65 results on '"Papaconstantinou HT"'
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2. Endovascular repair of a blunt traumatic axillary artery injury presenting with limb-threatening ischemia.
- Author
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Papaconstantinou HT, Fry DM, Giglia J, Hurst J, and Edwards JD
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- 2004
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3. Operative Time Accuracy in the Era of Electronic Health Records: Addressing the Elephant in the Room.
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Elsaqa M, El Tayeb MM, Yano S, and Papaconstantinou HT
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- Humans, Operative Time, Pilot Projects, Time Factors, Personnel Staffing and Scheduling, Electronic Health Records
- Abstract
Goal: Accurate prediction of operating room (OR) time is critical for effective utilization of resources, optimal staffing, and reduced costs. Currently, electronic health record (EHR) systems aid OR scheduling by predicting OR time for a specific surgeon and operation. On many occasions, the predicted OR time is subject to manipulation by surgeons during scheduling. We aimed to address the use of the EHR for OR scheduling and the impact of manipulations on OR time accuracy., Methods: Between April and August 2022, a pilot study was performed in our tertiary center where surgeons in multiple surgical specialties were encouraged toward nonmanipulation for predicted OR time during scheduling. The OR time accuracy within 5 months before trial (Group 1) and within the trial period (Group 2) were compared. Accurate cases were defined as cases with total length (wheels-in to wheels-out) within ±30 min or ±20% of the scheduled duration if the scheduled time is ≥ or <150 min, respectively. The study included single and multiple Current Procedural Terminology code procedures, while procedures involving multiple surgical specialties (combo cases) were excluded., Principal Findings: The study included a total of 8,821 operations, 4,243 (Group 1) and 4,578 (Group 2), (p < .001). The percentage of manipulation dropped from 19.8% (Group 1) to 7.6% (Group 2), (p < .001), while scheduling accuracy rose from 41.7% (Group 1) to 47.9% (Group 2), (p = .0001) with a significant reduction of underscheduling percentage (38.7% vs. 31.7%, p = .0001) and without a significant difference in the percentage of overscheduled cases (15% vs. 17%, p = .22). Inaccurate OR hours were reduced by 18% during the trial period (2,383 hr vs. 1,954 hr)., Practical Applications: The utilization of EHR systems for predicting OR time and reducing manipulation by surgeons helps improve OR scheduling accuracy and utilization of OR resources., Competing Interests: The authors declare no conflicts of interest., (Copyright © 2024 Foundation of the American College of Healthcare Executives.)
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- 2024
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4. Using an Educational Intervention to Map our Surgical Teams' Function, Emotional Intelligence, Communication and Conflict Styles.
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White BAA, Fleshman JW, Picchioni A, Hammonds KP, Gentry L, Bird ET, Arroliga AC, and Papaconstantinou HT
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- Child, Humans, Leadership, Health Personnel, Emotional Intelligence, Patient Care Team, Communication, Surgeons
- Abstract
Objective: The leadership team invited surgical team members to participate in educational sessions that created self and other awareness as well as gathered baseline information about these topics: communication, conflict management, emotional intelligence, and teamwork., Design: Each educational session included an inventory that was completed to help participants understand their own characteristics and the characteristics of their team members. The results from these inventories were aggregated, relationships were identified, and the intervention was evaluated., Setting: A level 1 trauma center, Baylor Scott and White Health, in central Texas; a 636-bed tertiary care main hospital and an affiliated children's hospital., Participants: An open invitation for all surgical team members yielded 551 interprofessional OR team members including anesthesia, attending physicians, nursing, physician assistants, residents, and administration., Results: Surgeons' communication styles were individual focused, while other team members were group focused. The most common conflict management mode for surgical team members on average was avoiding, and the least common was collaborating. Surgeons primarily used competing mode for conflict management, with avoiding coming in a close second. Finally, the 5 dysfunctions of a team inventory revealed low accountability scores, meaning the participants struggled with holding team members accountable., Conclusions: Helping team members understand their own and others' strengths and blind spots will help create opportunity for more purposeful and clear communication. Additionally, this knowledge should improve efficiency and safety in the high-stakes environment of the operating room., (Copyright © 2023 Association of Program Directors in Surgery. Published by Elsevier Inc. All rights reserved.)
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- 2023
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5. Moving beyond teamwork in the operating room to facilitating mutual professional respect.
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Lin MW, Papaconstantinou HT, and White BAA
- Abstract
Psychological safety enables the interpersonal risk-taking necessary for providing safer patient care in the operating room (OR). Limited studies look at psychological safety in the OR from the perspectives of each highly specialized team member. Therefore, we investigated each member's perspective on the factors that influence psychological safety in the OR. Interviews were conducted with operative team members of a level 1 trauma center in central Texas. The interviews were transcribed, de-identified, and coded by two investigators independently, and thematic analysis was performed. Responses were collected from 21 participants representing all surgical team roles (attending surgeons, attending anesthesiologists, circulating nurses, nurse anesthetists, scrub techs, and residents). Circulating nurse responses were redacted for confidentiality (n = 1). Six major themes influencing psychological safety in the OR were identified. Psychological safety is essential to better, safer patient care. Establishing a climate of mutual respect and suspended judgment in an OR safe for learning will lay the foundation for achieving psychological safety in the OR. Team exercises in building rapport and mutual understanding are important starting points., (Copyright © 2022 Baylor University Medical Center.)
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- 2022
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6. Closing the educational gap in surgery: Teaching team communication and conflict management.
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Adair White BA, Picchioni A, Gentry L, Malek AJ, Mrdutt MM, Fleshman JW, Bird ET, Arroliga AC, and Papaconstantinou HT
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- Humans, Patient Care Team, Operating Rooms, Communication, Interprofessional Relations
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- 2022
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7. Initial Outcomes of a Novel Irrigating Wound Protector for Reducing the Risk of Surgical Site Infection in Elective Colectomies.
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Malek AJ, Stafford SV, Papaconstantinou HT, and Thomas JS
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- Adult, Aged, Aged, 80 and over, Colectomy adverse effects, Colectomy economics, Elective Surgical Procedures adverse effects, Elective Surgical Procedures economics, Elective Surgical Procedures instrumentation, Female, Humans, Length of Stay, Male, Middle Aged, Retrospective Studies, Surgical Wound Infection economics, Surgical Wound Infection epidemiology, Surgical Wound Infection etiology, Texas epidemiology, Colectomy instrumentation, Surgical Wound Infection prevention & control
- Abstract
Background: Surgical site infection (SSI) rates in elective colorectal surgery remain high due to intraoperative exposure of colonic bacteria at the surgical site. We aimed to evaluate 30-day SSI outcomes of a novel wound retractor that combines barrier protection with continuous wound irrigation in elective colorectal resection., Materials and Methods: A retrospective single-center cohort-matched analysis included all patients undergoing elective colorectal resection utilizing the novel irrigating wound protector (IWP) from April 2015 to July 2019. A control cohort of patients who underwent the same procedures with a standard wound protector over the same time period were also identified. Patients from both groups were matched for procedure type, procedure approach, pathology requiring operation, age, sex, race, body mass index, diabetes, smoker status, hypertension, presence of disseminated cancer, current steroid or immunosuppressant use, wound classification, and American Society of Anesthesiologist classification. SSI frequency, SSI subtype (superficial, deep, or organ space), hospital length of stay (LOS) and associated procedure were tabulated through 30 postoperative days. Fisher's exact test and number needed to treat (NNT) were used to compare SSI rates and estimate cost between both groups., Results: The IWP group had 41 patients. The control group had 82 patients. Control-matched variables were similar for both groups. 30-day SSI rates were significantly lower in the IWP group (P=0.0298). length of stay was significantly shorter in the IWP group (P=0.0150). The NNT for the IWP to prevent one episode of SSI was 8.2 patients., Conclusions: The novel IWP device shows promise to reducing the risk of SSI in elective colorectal surgery., (Copyright © 2021. Published by Elsevier Inc.)
- Published
- 2021
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8. Resident-Championed Quality Improvement Provides Value: Confronting Prolonged Mechanical Ventilation.
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Malek AJ, Isbell CL, Mrdutt MM, Zamin SA, Allen EM, Coulson SE, Regner JL, and Papaconstantinou HT
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- Case-Control Studies, Female, Hospital Mortality, Humans, Length of Stay statistics & numerical data, Longitudinal Studies, Male, Middle Aged, Patient Discharge statistics & numerical data, Postoperative Complications epidemiology, Retrospective Studies, Risk Assessment, Risk Factors, Surgeons organization & administration, Time Factors, Internship and Residency organization & administration, Postoperative Care education, Postoperative Complications therapy, Quality Improvement organization & administration, Respiration, Artificial statistics & numerical data, Surgeons education
- Abstract
Background: The Quality In-Training Initiative (QITI) provides hands-on quality improvement education for residents. As our institution has ranked in the bottom quartile for prolonged mechanical ventilation (PMV) according to the National Surgical Quality Improvement Program (NSQIP), we sought to illustrate how our resident-led QITI could be used to determine perioperative contributors to PMV., Materials and Methods: The Model for Improvement framework (developed by Associates in Process Improvement) was used to target postoperative ventilator management. However, baseline findings from our 2016 NSQIP data suggested that preoperative patient factors were more likely contributing to PMV. Subsequently, a retrospective one-to-one case-control study was developed, comparing preoperative NSQIP risk calculator profiles for PMV patients to case-matched patients for age, sex, procedure, and emergent case status. Chart review determined ventilator time, 30-d outcomes, and all-cause mortality., Results: Forty-five patients with PMV (69% elective) had a median ventilator time of 134 h (interquartile range 87-254). The NSQIP calculator demonstrated increased preoperative risk percentages in PMV patients when compared to case-matched patients for any complication (includes PMV), predicted length of stay, and death (all P < 0.05). Thirty-day outcomes were worse for the PMV group in categories for sepsis, pneumonia, unplanned reoperation, 30-d mortality, rehab facility discharge, and length of stay (all P < 0.05). All-cause mortality was also significantly higher for PMV patients (P < 0.05)., Conclusions: Resident-led QITI projects enhance resident education while exposing opportunities for improving care. Preoperative patient factors play a larger-than-anticipated role in PMV at our institution. Ongoing efforts are aimed toward preoperative identification and optimization of high-risk patients., (Copyright © 2020 Elsevier Inc. All rights reserved.)
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- 2020
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9. Preoperative Frailty and Surgical Outcomes Across Diverse Surgical Subspecialties in a Large Health Care System.
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Mrdutt MM, Papaconstantinou HT, Robinson BD, Bird ET, and Isbell CL
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- Adolescent, Adult, Aged, Aged, 80 and over, Female, Frail Elderly, Frailty diagnosis, Frailty economics, Hospital Costs statistics & numerical data, Humans, Length of Stay economics, Length of Stay statistics & numerical data, Logistic Models, Male, Middle Aged, Patient Readmission economics, Patient Readmission statistics & numerical data, Postoperative Complications economics, Postoperative Complications epidemiology, Postoperative Complications etiology, Prognosis, Retrospective Studies, Risk Assessment, Risk Factors, Texas, Young Adult, Elective Surgical Procedures, Frailty complications
- Abstract
Background: Frailty is an emerging risk factor for surgical outcomes; however, its application across large populations is not well defined. We hypothesized that frailty affects postoperative outcomes in a large health care system., Study Design: Frailty was prospectively measured in elective surgery patients (January 2016 to June 2017) in a health care system (4 hospitals/901 beds). Frailty classifications-low (0), intermediate (1 to 2), high (3 to 5)-were assigned based on the modified Hopkins score. Operations were classified as inpatient (IP) vs outpatient (OP). Outcomes measured (30-day) included major morbidity, discharge location, emergency department (ED) visit, readmission, length of stay (LOS), mortality, and direct-cost/patient., Results: There were 14,530 elective surgery patients (68.1% outpatient, 31.9% inpatient) preoperatively assessed (cardiothoracic 4%, colorectal 4%, general 29%, oral maxillofacial 2%, otolaryngology 8%, plastic surgery 13%, podiatry 6%, surgical oncology 5%, transplant 3%, urology 24%, vascular 2%). High frailty was found in 3.4% of patients (5.3% IP, 2.5% OP). Incidence of major morbidity, readmission, and mortality correlated with frailty classification in all patients (p < 0.05). In the IP cohort, length of stay in days (low 1.6, intermediate 2.3, high 4.1, p < 0.0001) and discharge to facility increased with frailty (p < 0.05). In the OP cohort, ED visits increased with frailty (p < 0.05). Frailty was associated with increased direct-cost in the IP cohort (low, $7,045; intermediate, $7,995; high, $8,599; p < 0.05)., Conclusions: Frailty affects morbidity, mortality, and health care resource use in both IP and OP operations. Additionally, IP cost increased with frailty. The broad applicability of frailty (across surgical specialties) represents an opportunity for risk stratification and patient optimization across a large health care system., (Copyright © 2019 American College of Surgeons. Published by Elsevier Inc. All rights reserved.)
- Published
- 2019
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10. Impact of a Novel Surgical Wound Protection Device on Observed versus Expected Surgical Site Infection Rates after Colectomy Using the National Surgical Quality Improvement Program Risk Calculator.
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Papaconstantinou HT, Birnbaum EH, Ricciardi R, Margolin DA, Moesinger RC, Lichliter WE, Thomas JS, and Bergamaschi R
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- Adult, Aged, Aged, 80 and over, Female, Humans, Male, Middle Aged, Prospective Studies, Treatment Outcome, Colectomy adverse effects, Colectomy methods, Surgical Wound Infection epidemiology, Surgical Wound Infection prevention & control, Therapeutic Irrigation methods
- Abstract
Background: Surgical site infection (SSI) remains a persistent and morbid problem in colorectal surgery. A novel surgical device that combines barrier surgical wound protection and continuous surgical wound irrigation was evaluated in a cohort of elective colorectal surgery patients. A retrospective analysis was performed comparing rates of SSI observed in a prospective cohort study with the predicted rate of SSI using the American College of Surgeons (ACS) National Surgical Quality Improvement Program (NSQIP) Risk Calculator., Patients and Methods: A prospective multi-center study of colectomy patients was conducted using a study device for surgical site retraction and protection, as well as irrigation of the incision. Patients were followed for 30 days after the surgical procedure to assess for SSI. After completion of the study, patients' characteristics were inserted into the ACS-NSQIP Risk Calculator to determine the predicted rate of SSI for the given patient population and compared with the observed rate in the study., Results: A total of 108 subjects were enrolled in the study. The observed rate of SSI in the prospective study using the novel device was 3.7% (4/108). The predicted rate of SSI in the same patient population utilizing the ACS-NSQIP Risk Calculator was estimated to be 9.5%. This demonstrated a 61% difference (3.7% vs. 9.5%, p = 0.04) in SSI from the NSQIP predicted rate with the use of the irrigating surgical wound protection and retraction device., Conclusions: These data suggest the use of a novel surgical wound protection device seems to reduce the rate of SSIs in colorectal surgery.
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- 2019
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11. A Novel Wound Retractor Combining Continuous Irrigation and Barrier Protection Reduces Incisional Contamination in Colorectal Surgery.
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Papaconstantinou HT, Ricciardi R, Margolin DA, Bergamaschi R, Moesinger RC, Lichliter WE, and Birnbaum EH
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- Aged, Bacteria isolation & purification, Digestive System Surgical Procedures adverse effects, Elective Surgical Procedures adverse effects, Elective Surgical Procedures instrumentation, Female, Humans, Male, Middle Aged, Pilot Projects, Prospective Studies, Surgical Instruments adverse effects, Surgical Wound Infection etiology, Therapeutic Irrigation, Colon surgery, Digestive System Surgical Procedures instrumentation, Rectum surgery, Surgical Wound microbiology, Surgical Wound Infection prevention & control
- Abstract
Background: Surgical site infection (SSI) remains a persistent and morbid problem in colorectal surgery. Key to its pathogenesis is the degree of intraoperative bacterial contamination at the surgical site. The purpose of this study was to evaluate a novel wound retractor at reducing bacterial contamination., Methods: A prospective multicenter pilot study utilizing a novel wound retractor combining continuous irrigation and barrier protection was conducted in patients undergoing elective colorectal resections. Culture swabs were collected from the incision edge prior to device placement and from the exposed and protected incision edge prior to device removal. The primary and secondary endpoints were the rate of enteric and overall bacterial contamination on the exposed incision edge as compared to the protected incision edge, respectively. The safety endpoint was the absence of serious device-related adverse events., Results: A total of 86 patients were eligible for analysis. The novel wound retractor was associated with a 66% reduction in overall bacterial contamination at the protected incision edge compared to the exposed incision edge (11.9 vs. 34.5%, P < 0.001), and 71% reduction in enteric bacterial contamination (9.5% vs. 33.3%, P < 0.001). The incisional SSI rate was 2.3% in the primary analysis and 1.2% in those that completed the protocol. There were no adverse events attributed to device use., Conclusions: A novel wound retractor combining continuous irrigation and barrier protection was associated with a significant reduction in bacterial contamination. Improved methods to counteract wound contamination represent a promising strategy for SSI prevention (NCT 02413879).
- Published
- 2018
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12. Impact of complications on length of stay in elective laparoscopic colectomies.
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Mrdutt MM, Isbell CL, Thomas JS, Shaver CN, Essani R, Warrier R, and Papaconstantinou HT
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- Adolescent, Adult, Aged, Aged, 80 and over, Female, Humans, Laparoscopy, Male, Middle Aged, Retrospective Studies, United States epidemiology, Young Adult, Colectomy statistics & numerical data, Length of Stay, Postoperative Complications epidemiology
- Abstract
Background: Length of hospital stay (LOS) is an indirect measure of surgical quality and a surrogate for cost. The impact of postoperative complications on LOS following elective colorectal surgery is not well defined. The purpose of this study is to determine the contribution of specific complications towards LOS in elective laparoscopic colectomy patients., Materials and Methods: American College of Surgeon's National Surgical Quality Improvement Program database (2011-2014) was queried for patients undergoing elective laparoscopic partial colectomy with primary anastomosis. Demographics, specific 30 d postoperative complications and LOS, were evaluated. A negative binomial regression adjusting for demographic variables and complications was performed to explore the impact of individual complications on LOS, significance set at P < 0.05., Results: A total of 42,365 patients were evaluated, with an overall median LOS 4.0 d (interquartile range, 3.0-5.0). Unplanned reoperation and pneumonia each increase LOS by 50%; superficial surgical site infections (SSIs), organ space SSI sepsis, urinary tract infection, ventilation >48 h, pulmonary embolism, and myocardial infarction each increase LOS by at least 25% (P < 0.0001). When accounting for additional LOS and rate of complications, unplanned reoperation, bleeding requiring transfusion within 72 h, and superficial SSIs were the highest impact complications., Conclusions: In laparoscopic colectomy, each complication uniquely impacts LOS, and therefore cost. Utilizing this model, individual hospitals can implement pathways targeting specific complication profiles to improve care and minimize health care cost., (Copyright © 2017 Elsevier Inc. All rights reserved.)
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- 2017
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13. NSQIP-Based Quality Improvement Curriculum for Surgical Residents.
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Mrdutt MM, Isbell CL, Regner JL, Hodges BR, Munoz-Maldonado Y, Thomas JS, and Papaconstantinou HT
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- Clinical Competence, Humans, Retrospective Studies, Curriculum, General Surgery education, Internship and Residency, Quality Improvement
- Abstract
Background: General surgery training has historically lacked a standardized approach to resident quality improvement (QI) education aside from traditional morbidity and mortality conference. In 2013, the ACGME formalized QI as a component of residency training. Our residency chose the NSQIP Quality In-Training Initiative (QITI) as the foundation for our QI training. We hypothesized that a focused curriculum based on outcomes would produce change in culture and improve the quality of patient care., Study Design: Quality improvement curriculum design and implementation were retrospectively reviewed. Institutional NSQIP data pre-, during, and post-curriculum implementation were reviewed for improvement., Results: A QITI project committee designed a 2-year curriculum, with 3 parts: didactics, focused on methods of data collection, QI processes, and techniques; review of current institutional performance, practice, and complication rates; and QI breakout groups tasked with creating "best practice" guidelines addressing common complications in our NSQIP semi-annual reports. Educational presentations were given to the surgical department addressing reduction of cardiac complications, pneumonia, surgical site infections (SSIs), and urinary tract infections (UTIs). Twenty-four residents completed both years of the QITI curriculum. National NSQIP decile ranks improved in known high outlier areas: cardiac complications, ninth to fourth decile; pneumonia, eighth to first decile; SSIs, tenth to second decile; and UTIs, eighth to third decile. Pneumonia and SSI rates demonstrated statistical improvement after curriculum implementation (p < 0.003)., Conclusions: Implementing a QITI curriculum with a full resident complement is feasible and can positively affect surgical morbidity and nationally benchmarked performance. Resident QI education is essential to future success in delivering high quality surgical care., (Copyright © 2017 American College of Surgeons. Published by Elsevier Inc. All rights reserved.)
- Published
- 2017
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14. Development and Validation of a Methodology to Reduce Mortality Using the Veterans Affairs Surgical Quality Improvement Program Risk Calculator.
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Keller DS, Kroll D, Papaconstantinou HT, and Ellis CN
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- Databases, Factual, Hospitals, Veterans organization & administration, Humans, Postoperative Care methods, Prospective Studies, Quality Indicators, Health Care statistics & numerical data, ROC Curve, Referral and Consultation organization & administration, Retrospective Studies, Risk Assessment, Tertiary Healthcare, United States, Elective Surgical Procedures mortality, Health Status Indicators, Hospitals, Veterans standards, Postoperative Care standards, Quality Improvement organization & administration, Referral and Consultation standards, Veterans Health
- Abstract
Background: To identify patients with a high risk of 30-day mortality after elective surgery, who may benefit from referral for tertiary care, an institution-specific process using the Veterans Affairs Surgical Quality Improvement Program (VASQIP) Risk Calculator was developed. The goal was to develop and validate the methodology. Our hypothesis was that the process could optimize referrals and reduce mortality., Study Design: A VASQIP risk score was calculated for all patients undergoing elective noncardiac surgery at a single Veterans Affairs (VA) facility. After statistical analysis, a VASQIP risk score of 3.3% predicted mortality was selected as the institutional threshold for referral to a tertiary care center. The model predicted that 16% of patients would require referral, and 30-day mortality would be reduced by 73% at the referring institution. The main outcomes measures were the actual vs predicted referrals and mortality rates at the referring and receiving facilities., Results: The validation included 565 patients; 90 (16%) had VASQIP risk scores greater than 3.3% and were identified for referral; 60 consented. In these patients, there were 16 (27%) predicted mortalities, but only 4 actual deaths (p = 0.007) at the receiving institution. When referral was not indicated, the model predicted 4 mortalities (1%), but no actual deaths (p = 0.1241)., Conclusions: These data validate this methodology to identify patients for referral to a higher level of care, reducing mortality at the referring institutions and significantly improving patient outcomes. This methodology can help guide decisions on referrals and optimize patient care. Further application and studies are warranted., (Copyright © 2017 American College of Surgeons. All rights reserved.)
- Published
- 2017
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15. The emerging role of microdialysis in diabetic patients undergoing amputation for limb ischemia.
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Liasis L, Malietzis G, Galyfos G, Athanasiou T, Papaconstantinou HT, Sigala F, Zografos G, and Filis K
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- Aged, Aged, 80 and over, Diabetes Mellitus, Type 1 complications, Diabetes Mellitus, Type 2 complications, Diabetic Angiopathies surgery, Female, Follow-Up Studies, Humans, Ischemia physiopathology, Lower Extremity, Male, Microcirculation physiology, Predictive Value of Tests, Plastic Surgery Procedures, Amputation, Surgical, Diabetes Mellitus, Type 1 physiopathology, Diabetes Mellitus, Type 2 physiopathology, Diabetic Angiopathies physiopathology, Ischemia surgery, Microdialysis trends
- Abstract
Lower limb ischemia in diabetic patients is a result of macro- and microcirculation dysfunction. Diabetic patients undergoing limb amputation carry high mortality and morbidity rates, and decision making concerning the level of amputation is critical. Aim of this study is to evaluate a novel microdialysis technique to monitor tissue microcirculation preoperatively and predict the success of limb amputation in such patients. Overall, 165 patients with type 2 diabetes mellitus undergoing lower limb amputation were enrolled. A microdialysis catheter was placed preoperatively at the level of the intended flap for the stump reconstruction, and the levels of glucose, glycerol, lactate and pyruvate were measured for 24 consecutive hours. Patients were then amputated and monitored for 30 days regarding the outcome of amputation. Failure of amputation was defined as delayed healing or stump ischemia. Patients were divided into two groups based on the success of amputation. There was no difference between the two groups regarding gender, ASA score, body mass index, comorbidities, diagnostic modality used, level of amputation, as well as glucose, glycerol, and pyruvate levels. However, local concentrations of lactate were significantly different between the two groups and lactate/pyruvate (L/P) ratio was independently associated with failed amputation (threshold defined at 25.35). Elevated preoperative tissue L/P ratio is independently associated with worse outcomes in diabetic patients undergoing limb amputation. Therefore, preoperative tissue L/P ratio could be used as a predicting tool for limb amputation's outcome, although more clinical data are needed to provide safer conclusions., (© 2016 by the Wound Healing Society.)
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- 2016
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16. Enhancing surgical safety using digital multimedia technology.
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Dixon JL, Mukhopadhyay D, Hunt J, Jupiter D, Smythe WR, and Papaconstantinou HT
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- Female, Humans, Male, Medical Errors prevention & control, Multimedia statistics & numerical data, Operating Rooms organization & administration, Pilot Projects, Preoperative Care, Prospective Studies, Safety Management methods, United States, Checklist, Patient Care Team organization & administration, Patient Safety, Quality Assurance, Health Care, Surgical Procedures, Operative methods, Time Out, Healthcare organization & administration
- Abstract
Background: The purpose of this study was to examine whether incorporating digital and video multimedia components improved surgical time-out performance of a surgical safety checklist., Methods: A prospective pilot study was designed for implementation of a multimedia time-out, including a patient video. Perceptions of the staff participants were surveyed before and after intervention (Likert scale: 1, strongly disagree to 5, strongly agree)., Results: Employee satisfaction was high for both time-out procedures. However, employees appreciated improved clarity of patient identification (P < .05) and operative laterality (P < .05) with the digital method. About 87% of the respondents preferred the digital version to the standard time-out (75% anesthesia, 89% surgeons, 93% nursing). Although the duration of time-outs increased (49 and 79 seconds for standard and digital time-outs, respectively, P > .001), there was significant improvement in performance of key safety elements., Conclusion: The multimedia time-out allows improved participation by the surgical team and is preferred to a standard time-out process., (Copyright © 2015 Elsevier Inc. All rights reserved.)
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- 2016
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17. Colorectal cancer implant in an external hemorrhoidal skin tag.
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Liasis L and Papaconstantinou HT
- Abstract
External hemorrhoidal skin tags are generally benign. Colorectal cancer metastases to the squamous epithelium of perianal skin tags without other evidence of disseminated disease is a very rare finding. We present the case of a 61-year-old man with metastasis to an external hemorrhoidal skin tag from a midrectal primary adenocarcinoma. This case report highlights the importance of close examination of the anus during surgical planning for colorectal cancers. Abnormal findings of the perianal skin suggesting an implant or metastatic disease warrant biopsy, as distal spread and seeding can occur. In our patient, this finding appropriately changed surgical management.
- Published
- 2016
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18. Surgeons' perspective of a newly initiated electronic medical record.
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Frazee R, Harmon L, and Papaconstantinou HT
- Abstract
The American Recovery and Reinvestment Act mandates "meaningful use" of an electronic health record (EHR) to receive current financial incentives and to avoid future financial penalties. Surgeons' ongoing adoption of an EHR nationally will be influenced by the early experiences of institutions that have made the transition from paper to electronic records. We conducted a survey to query surgeons at our institution regarding their perception of the EHR 3 months after institutional implementation. A total of 59 surveys were obtained from 24 senior staff and 35 residents. Results showed that surgeons believed the EHR was more effective as a billing tool than as a form of clinical documentation and believed the billing was more complete and accurate with the EHR. Surgeons also expressed concern that the EHR would negatively impact patient satisfaction, but in spite of this, they indicated that their personal quality of life was not negatively impacted.
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- 2016
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19. Methicillin-Resistant Staphylococcus aureus Colonization and Empyema: Does it Matter?
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Dixon JL, Papaconstantinou HT, Pruszynski J, Rascoe PA, and Reznik SI
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- Adult, Female, Humans, Incidence, Male, Middle Aged, Retrospective Studies, Carrier State microbiology, Empyema, Pleural epidemiology, Empyema, Pleural microbiology, Methicillin-Resistant Staphylococcus aureus isolation & purification, Staphylococcal Infections complications, Staphylococcal Infections microbiology
- Abstract
Background: The relation between MRSA colonization and empyema culture results is unknown. We hypothesized that MRSA-colonized patients would be more likely to develop MRSA empyema, and sought to determine if MRSA culture positive empyema had an effect on clinical management or patient outcomes., Methods: The medical records of patients with a diagnosis of empyema from 2007-2010 were retrospectively reviewed for demographics, MRSA colonization status, comorbidities, culture results, clinical management, and discharge disposition. The relationship between MRSA colonization status and culture results was analyzed by bivariate testing. Logistic regression was utilized to determine relations between empyema culture results, comorbidities, and clinical course., Results: Of 147 patients identified with empyema, 16 (10.8%) were MRSA colonized. Colonized patients had substantially higher rates of MRSA-positive empyema cultures (75% vs. 4.6%; p<0.001). A greater percentage of the MRSA-positive empyema patients 66.7% were managed with tube thoracostomy alone, compared with culture positive patients with an organism other than MRSA and those with negative cultures (39% and 34% respectively; p=0.043). Neither empyema culture results nor colonization status were substantial risk factors for poor discharge (skilled nursing facility, long-term care hospital, or death)., Conclusions: MRSA-colonized patients hospitalized with empyema are highly likely to have cultures positive for MRSA.
- Published
- 2015
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20. Patients' Perspectives of Surgical Safety: Do They Feel Safe?
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Dixon JL, Tillman MM, Wehbe-Janek H, Song J, and Papaconstantinou HT
- Abstract
Background: Increased focus on reducing patient harm has led to surgical safety initiatives, including time-out, surgical safety checklists, and debriefings. The perception of the lay public of the surgical safety process is largely unknown., Methods: A 20-question survey focused on perceptions of surgical safety practice was distributed to a random sample of patients following elective operations requiring hospitalization. Responses were measured by a 7-point Likert scale. Qualitative feedback was obtained through nonphysician-moderated sessions. Participation was voluntary and anonymous., Results: Surveys were distributed to 345 patients of whom 102 (29.5%) responded. Overall, patients felt safe as evidenced by scores for the questions "I felt safe the day of my surgery" (6.53 ± 0.72) and "Mistakes rarely happen during surgery" (5.39 ± 1.51). Patients undergoing their first surgery and patients with higher income levels were associated with a significant decrease in specific safety perceptions. Qualitative feedback sessions identified the physician-patient relationship as the most important factor positively influencing patient safety perceptions., Conclusion: Current surgical safety practice is perceived positively by our patients; however, patients still identify physician-patient interactions, relationships, and trust as the most positive factors influencing their perception of the safety environment.
- Published
- 2015
21. Concurrent chart review provides more accurate documentation and increased calculated case mix index, severity of illness, and risk of mortality.
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Frazee RC, Matejicka AV 2nd, Abernathy SW, Davis M, Isbell TS, Regner JL, Smith RW, Jupiter DC, and Papaconstantinou HT
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- Costs and Cost Analysis, Hospital Mortality trends, Humans, Insurance, Health, Reimbursement statistics & numerical data, Reproducibility of Results, Retrospective Studies, Risk Factors, Trauma Severity Indices, United States epidemiology, Diagnosis-Related Groups organization & administration, Documentation standards, Electronic Health Records, Risk Assessment methods, Trauma Centers organization & administration
- Abstract
Background: Case mix index (CMI) is calculated to determine the relative value assigned to a Diagnosis-Related Group. Accurate documentation of patient complications and comorbidities and major complications and comorbidities changes CMI and can affect hospital reimbursement and future pay for performance metrics., Study Design: Starting in 2010, a physician panel concurrently reviewed the documentation of the trauma/acute care surgeons. Clarifications of the Centers for Medicare and Medicaid Services term-specific documentation were made by the panel, and the surgeon could incorporate or decline the clinical queries. A retrospective review of trauma/acute care inpatients was performed. The mean severity of illness, risk of mortality, and CMI from 2009 were compared with the 3 subsequent years. Mean length of stay and mean Injury Severity Score by year were listed as measures of patient acuity. Statistical analysis was performed using ANOVA and t-test, with p < 0.05 for significance., Results: Each year demonstrated an increase in severity of illness, risk of mortality, and CMI compared with baseline values (p < 0.05). Length of stay was not significantly different, reflecting similar patient populations throughout the study. Injury Severity Score decreased in 2011 and 2012 compared with 2009, reflecting a lower level of injury in the trauma population., Conclusions: A concurrent documentation review significantly increases severity of illness, risk of mortality, and CMI scores in a trauma/acute care service compared with pre-program levels. These changes reflect more accurate key word documentation rather than a change in patient acuity. The increased scores might impact hospital reimbursement and more accurately stratify outcomes measures for care providers., (Copyright © 2015 American College of Surgeons. Published by Elsevier Inc. All rights reserved.)
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- 2015
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22. Redundancy and variability in quality and outcome reporting for cardiac and thoracic surgery.
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Dixon JL, Papaconstantinou HT, Hodges B, Korsmo RS, Jupiter D, Shake J, Sareyyupoglu B, Rascoe PA, and Reznik SI
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Health care is evolving into a value-based reimbursement system focused on quality and outcomes. Reported outcomes from national databases are used for quality improvement projects and public reporting. This study compared reported outcomes in cardiac and thoracic surgery from two validated reporting databases-the Society of Thoracic Surgeons (STS) database and the National Surgical Quality Improvement Program (NSQIP)-from January 2011 to June 2012. Quality metrics and outcomes included mortality, wound infection, prolonged ventilation, pneumonia, renal failure, stroke, and cardiac arrest. Comparison was made by chi-square analysis. A total of 737 and 177 cardiac surgery cases and 451 and 105 thoracic surgery cases were captured by the STS database and NSQIP, respectively. Within cardiac surgery, there was a statistically significant difference in the reported rates of prolonged ventilation, renal failure, and mortality. No significant differences were found for the thoracic surgery data. In conclusion, our data indicated a significant discordance in quality reporting for cardiac surgery between the NSQIP and the STS databases. The disparity between databases and duplicate participation strongly indicates that a unified national quality reporting program is required. Consolidation of reporting databases and standardization of morbidity definitions across all databases may improve participation and reduce hospital cost.
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- 2015
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23. Small bowel intussusception causing a postoperative bowel obstruction following laparoscopic low anterior resection in an adult.
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Hussain AS, Warrier R, and Papaconstantinou HT
- Abstract
Adult intussusception usually presents with nonspecific symptoms such as abdominal pain, bloating, nausea, vomiting, and a change in bowel habits. Although postoperative intussusception has been described in the pediatric population, there has been little description of it in the adult population. Postoperative intussusception has unique challenges, as hydrostatic reduction may compromise bowel anastomoses. Surgery is the universal treatment in these patients. In adults, delay in diagnosis and definitive treatment may be a direct result of common symptomatology between postoperative ileus and intussusception. We present a case of an adult patient who underwent laparoscopic low anterior resection for rectal cancer and developed a small bowel intussusception causing obstruction requiring surgery. To our knowledge, this is the first report of a small bowel intussusception masquerading as a postoperative ileus in an adult. While most postoperative delayed bowel function is attributed to ileus, abscess formation, or anastomotic leak, other uncommon etiologies, including intussusception, may occur and are important to include in the differential diagnosis.
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- 2014
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24. Surgical safety checklist and operating room efficiency: results from a large multispecialty tertiary care hospital.
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Papaconstantinou HT, Smythe WR, Reznik SI, Sibbitt S, and Wehbe-Janek H
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- Female, Humans, Male, Texas, Checklist, Operating Rooms standards, Patient Safety standards, Quality Assurance, Health Care methods, Tertiary Care Centers standards
- Abstract
Background: The Surgical Safety Checklist (SSC) improves patient safety and outcomes; however, barriers to effective use include the perceived negative impact on operating room (OR) efficiency. The purpose of this study was to determine the effect of SSC implementation on OR efficiency., Methods: All operations at our large multispecialty tertiary care hospital were reviewed for 1-year pre- and 1-year post-SSC implementation. OR efficiency included operating room time, operation time, first starts on time, same-day cancellations, and OR disposable cost., Results: A total of 35,570 operations were reviewed: 17,204 pre-SSC and 18,366 post-SSC. There was no difference between groups for operating room time (P = .93), operation time (P = .66), first starts on time (P = .15), and same-day cancellations (P = .57). The mean OR disposable cost was significantly lower ($70/operation) for the post-SSC group (P < .01)., Conclusions: The implementation of an SSC does not negatively impact OR efficiency and should not be considered a barrier to effective use. Our data suggest that SSC use can reduce overall cost per surgical procedure., (Copyright © 2013 Elsevier Inc. All rights reserved.)
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- 2013
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25. Surgical Safety Checklist compliance: a job done poorly!
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Sparks EA, Wehbe-Janek H, Johnson RL, Smythe WR, and Papaconstantinou HT
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- Humans, Retrospective Studies, Checklist standards, Guideline Adherence, Patient Safety, Surgical Procedures, Operative standards
- Abstract
Background: The Surgical Safety Checklist (SSC) has been introduced as an effective tool for reducing perioperative mortality and complications. Although reported completion rates are high, objective compliance is not well defined. The purpose of this retrospective analysis is to determine SSC compliance as measured by accuracy and completion, and factors that can affect compliance., Study Design: In September 2010, our institution implemented an adaptation of the World Health Organization's SSC in an effort to improve patient safety and outcomes. A tool was developed for objective evaluation of overall compliance (maximum score 40) that was an aggregate score of completion and accuracy (20 each). Random samples of SSCs were analyzed at specific, predefined, time points throughout the first year after implementation. Procedure start time, operative time, and case complexity were assessed to determine association with compliance., Results: A total of 671 SSCs were analyzed. The participation rate improved from 33% (95 of 285) at week 1 to 94% (249 of 265) at 1 year (p < 0.0001, chi-square test). Mean overall compliance score was 27.7 (± 5.4 SD) of 40 possible points (69.3% ± 13.5% of total possible score; n = 671) and did not change over time. Although completion scores were high (16.9 ± 2.7 out of 20 [84.5% ± 13.6%]), accuracy was poor (10.8 ± 3.4 out of 20 [54.1% ± 16.9%]). Overall compliance score was significantly associated with case start-time (p < 0.05), and operative time and case complexity showed no association., Conclusions: Our data indicate that although implementation of an SSC results in a high level of overall participation and completion, accuracy remained poor. Identification of barriers to effective use is needed, as improper checklist use can adversely affect patient safety., (Copyright © 2013 American College of Surgeons. Published by Elsevier Inc. All rights reserved.)
- Published
- 2013
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26. Surgical care improvement project and surgical site infections: can integration in the surgical safety checklist improve quality performance and clinical outcomes?
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Tillman M, Wehbe-Janek H, Hodges B, Smythe WR, and Papaconstantinou HT
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- Academic Medical Centers standards, Anti-Bacterial Agents therapeutic use, Follow-Up Studies, Health Care Surveys, Hospital Mortality, Humans, Hypothermia mortality, Operating Rooms, Perioperative Care standards, Risk Factors, Surgical Wound Infection drug therapy, Surgical Wound Infection mortality, Temperature, Checklist standards, Outcome and Process Assessment, Health Care, Quality Assurance, Health Care, Quality Improvement, Surgical Wound Infection prevention & control
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Introduction: The World Health Organization Surgical Safety Checklist (SSC) has been shown to decrease surgical site infections (SSI). The Surgical Care Improvement Project (SCIP) SSI reduction bundle (SCIP Inf) contains elements to improve SSI rates. We wanted to determine if integration of SCIP measures within our SSC would improve SCIP performance and patient outcomes for SSI., Methods: An integrated SSC that included perioperative SCIP Inf measures (antibiotic selection, antibiotic timing, and temperature management) was implemented. We compared SCIP Inf compliance and patient outcomes for 1-y before and 1-y after SSC implementation. Outcomes included number of patients with initial post-anesthesia care unit temperature <98.6°F and SSI rates according to our National Surgical Quality Improvement Program data., Results: Implementation of a SCIP integrated SSC resulted in a significant improvement in antibiotic infusion timing (92.7% [670/723] versus 95.4% [557/584]; P < 0.05), antibiotic selection (96.2% [707/735] versus 98.7% [584/592]; P < 0.01), and temperature management (93.8% [723/771] versus 97.7% [693/709]; P < 0.001). Furthermore, we found a significant reduction in number of patients with initial post-anesthesia care unit temperature <98.6°F from 9.7% (982/10,126) to 6.9% (671/9676) (P < 0.001). Institutional SSI rates decreased from 3.13% (104/3319) to 2.96% (107/3616), but was not significant (P = 0.72). SSI rates according to specialty service were similar for all groups except colorectal surgery (24.1% [19/79] versus 11.5% [12/104]; P < 0.05)., Conclusion: Implementation of an integrated SSC can improve compliance of SSI reduction strategies such as SCIP Inf performance and maintenance of normothermia. This did not, however, correlate with an improvement in overall SSI at our institution. Further investigation is required to determine other factors that may influence SSI at an institutional level., (Copyright © 2013 Elsevier Inc. All rights reserved.)
- Published
- 2013
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27. House Staff Quality Council: One Institution's Experience to Integrate Resident Involvement in Patient Care Improvement Initiatives.
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Dixon JL, Papaconstantinou HT, Erwin JP 3rd, McAllister RK, Berry T, and Wehbe-Janek H
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Background: Residents and fellows perform a large portion of the hands-on patient care in tertiary referral centers. As frontline providers, they are well suited to identify quality and patient safety issues. As payment reform shifts hospitals to a fee-for-value-type system with reimbursement contingent on quality outcomes, preventive health, and patient satisfaction, house staff must be intimately involved in identifying and solving care delivery problems related to quality, outcomes, and patient safety. Many challenges exist in integrating house staff into the quality improvement infrastructure; these challenges may ideally be managed by the development of a house staff quality council (HSQC)., Methods: Residents and fellows at Scott & White Memorial Hospital interested in participating in a quality council submitted an application, curriculum vitae, and letter of support from their program director. Twelve residents and fellows were selected based on their prior quality improvement experience and/or their interest in quality and safety initiatives., Results: In only 1 year, our HSQC, an Alliance of Independent Academic Medical Centers National Initiative III project, initiated 3 quality projects and began development of a fourth project., Conclusion: Academic medical centers should consider establishing HSQCs to align institutional quality goals with residency training and medical education.
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- 2013
28. Quick Response codes for surgical safety: a prospective pilot study.
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Dixon JL, Smythe WR, Momsen LS, Jupiter D, and Papaconstantinou HT
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- Health Care Surveys, Humans, Patient Care Team organization & administration, Patient Care Team standards, Patient Identification Systems methods, Pilot Projects, Prospective Studies, Safety Management methods, Checklist, Outcome Assessment, Health Care, Patient Identification Systems organization & administration, Patient Safety, Safety Management organization & administration, Surgery Department, Hospital organization & administration
- Abstract
Background: Surgical safety programs have been shown to reduce patient harm; however, there is variable compliance. The purpose of this study is to determine if innovative technology such as Quick Response (QR) codes can facilitate surgical safety initiatives., Methods: We prospectively evaluated the use of QR codes during the surgical time-out for 40 operations. Feasibility and accuracy were assessed. Perceptions of the current time-out process and the QR code application were evaluated through surveys using a 5-point Likert scale and binomial yes or no questions., Results: At baseline (n = 53), survey results from the surgical team agreed or strongly agreed that the current time-out process was efficient (64%), easy to use (77%), and provided clear information (89%). However, 65% of surgeons felt that process improvements were needed. Thirty-seven of 40 (92.5%) QR codes scanned successfully, of which 100% were accurate. Three scan failures resulted from excessive curvature or wrinkling of the QR code label on the body. Follow-up survey results (n = 33) showed that the surgical team agreed or strongly agreed that the QR program was clearer (70%), easier to use (57%), and more accurate (84%). Seventy-four percent preferred the QR system to the current time-out process., Conclusions: QR codes accurately transmit patient information during the time-out procedure and are preferred to the current process by surgical team members. The novel application of this technology may improve compliance, accuracy, and outcomes., (Copyright © 2013 Elsevier Inc. All rights reserved.)
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- 2013
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29. Implementation of a surgical safety checklist: impact on surgical team perspectives.
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Papaconstantinou HT, Jo C, Reznik SI, Smythe WR, and Wehbe-Janek H
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Background: The World Health Organization (WHO) surgical safety checklist has been shown to decrease mortality and complications and has been adopted worldwide. However, system flaws and human errors persist. Identifying provider perspectives of patient safety initiatives may identify strategies for improvement. The purpose of this study was to determine provider perspectives of surgical safety checklist implementation in an effort to improve initiatives that enhance surgical patients' safety., Methods: In September 2010, a WHO-adapted surgical safety checklist was implemented at our institution. Surgical teams were invited to complete a checklist-focused questionnaire 1 month before and 1 year after implementation. Baseline and follow-up results were compared., Results: A total of 437 surgical care providers responded to the survey: 45% of providers responded at baseline and 64% of providers responded at follow-up. Of the total respondents, 153 (35%) were nurses, 104 (24%) were anesthesia providers, and 180 (41%) were surgeons. Overall, we found an improvement in the awareness of patient safety and quality of care, with significant improvements in the perception of the value of and participation in the time-out process, in surgical team communication, and in the establishment and clarity of patient care needs. Some discordance was noted between surgeons and other surgical team members, indicating that barriers in communication still exist. Overall, approximately 65% of respondents perceived that the checklist improved patient safety and patient care; however, we found a strong negative perception of operating room efficiency., Conclusion: Implementation of a surgical safety checklist improves perceptions of surgical safety. Barriers to implementation exist, but staff feedback may be used to enhance the sustainability and success of patient safety initiatives.
- Published
- 2013
30. Re: Traumatic abdominal wall hernia classifications.
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Liasis L, Tierris I, Fotini L, Clark CC, and Papaconstantinou HT
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- Humans, Abdominal Injuries, Hernia, Ventral, Herniorrhaphy methods, Practice Guidelines as Topic
- Published
- 2013
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31. The novel BH3 α-helix mimetic JY-1-106 induces apoptosis in a subset of cancer cells (lung cancer, colon cancer and mesothelioma) by disrupting Bcl-xL and Mcl-1 protein-protein interactions with Bak.
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Cao X, Yap JL, Newell-Rogers MK, Peddaboina C, Jiang W, Papaconstantinou HT, Jupitor D, Rai A, Jung KY, Tubin RP, Yu W, Vanommeslaeghe K, Wilder PT, MacKerell AD Jr, Fletcher S, and Smythe RW
- Subjects
- Animals, Apoptosis, Cell Line, Tumor, Colonic Neoplasms metabolism, Humans, Lung Neoplasms drug therapy, Lung Neoplasms metabolism, Mesothelioma metabolism, Mice, Molecular Dynamics Simulation, Molecular Mimicry, Protein Structure, Secondary, Protein Structure, Tertiary, Xenograft Model Antitumor Assays, Antineoplastic Agents pharmacology, Benzamides pharmacology, Colonic Neoplasms pathology, Lung Neoplasms pathology, Mesothelioma pathology, Myeloid Cell Leukemia Sequence 1 Protein metabolism, bcl-2 Homologous Antagonist-Killer Protein metabolism, bcl-X Protein metabolism, para-Aminobenzoates pharmacology
- Abstract
Background: It has been shown in many solid tumors that the overexpression of the pro-survival Bcl-2 family members Bcl-2/Bcl-xL and Mcl-1 confers resistance to a variety of chemotherapeutic agents. We designed the BH3 α-helix mimetic JY-1-106 to engage the hydrophobic BH3-binding grooves on the surfaces of both Bcl-xL and Mcl-1., Methods: JY-1-106-protein complexes were studied using molecular dynamics (MD) simulations and the SILCS methodology. We have evaluated the in vitro effects of JY-1-106 by using a fluorescence polarization (FP) assay, an XTT assay, apoptosis assays, and immunoprecipitation and western-blot assays. A preclinical human cancer xenograft model was used to test the efficacy of JY-1-106 in vivo., Results: MD and SILCS simulations of the JY-1-106-protein complexes indicated the importance of the aliphatic side chains of JY-1-106 to binding and successfully predicted the improved affinity of the ligand for Bcl-xL over Mcl-1. Ligand binding affinities were measured via an FP assay using a fluorescently labeled Bak-BH3 peptide in vitro. Apoptosis induction via JY-1-106 was evidenced by TUNEL assay and PARP cleavage as well as by Bax-Bax dimerization. Release of multi-domain Bak from its inhibitory binding to Bcl-2/Bcl-xL and Mcl-1 using JY-1-106 was detected via immunoprecipitation (IP) western blotting.At the cellular level, we compared the growth proliferation IC50s of JY-1-106 and ABT-737 in multiple cancer cell lines with various Bcl-xL and Mcl-1 expression levels. JY-1-106 effectively induced cell death regardless of the Mcl-1 expression level in ABT-737 resistant solid tumor cells, whilst toxicity toward normal human endothelial cells was limited. Furthermore, synergistic effects were observed in A549 cells using a combination of JY-1-106 and multiple chemotherapeutic agents. We also observed that JY-1-106 was a very effective agent in inducing apoptosis in metabolically stressed tumors. Finally, JY-1-106 was evaluated in a tumor-bearing nude mouse model, and was found to effectively repress tumor growth. Strong TUNEL signals in the tumor cells demonstrated the effectiveness of JY-1-106 in this animal model. No significant side effects were observed in mouse organs after multiple injections., Conclusions: Taken together, these observations demonstrate that JY-1-106 is an effective pan-Bcl-2 inhibitor with very promising clinical potential.
- Published
- 2013
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32. Noncosmetic benefits of single-incision laparoscopic sigmoid colectomy for diverticular disease: a case-matched comparison with multiport laparoscopic technique.
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Vasilakis V, Clark CE, Liasis L, and Papaconstantinou HT
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- Adult, Aged, Aged, 80 and over, Female, Humans, Length of Stay, Male, Middle Aged, Pain Measurement, Pain, Postoperative physiopathology, Postoperative Care, Colectomy methods, Colon, Sigmoid surgery, Diverticulum surgery, Laparoscopy methods
- Abstract
Background: Single-incision laparoscopic (SIL) colectomy has gained significant momentum with anticipated benefit of improved cosmesis. Feasibility and safety of SIL colectomy have been shown; however, benefits are not well defined. The purpose of this study is to directly compare outcomes of SIL sigmoid colectomy for diverticular disease with standard multiport laparoscopic (LAP) technique., Methods: SIL sigmoid colectomy cases performed for diverticular disease between August 2009 and July 2011 were case matched for age, gender, body mass index, American Society of Anesthesiologists score, previous abdominal operation, and need to mobilize the splenic flexure and compared with an equal number of LAP cases. Data analyzed included operative time, estimated blood loss, procedure conversion, incision length, length of hospital stay (LOS), 30-d hospital readmission, and postoperative pain scores., Results: Twenty patients were analyzed in each group with no significant differences found in the six case-matching criteria. Operative time, conversions, estimated blood loss, surgical site infection, and hospital readmissions were similar. The mean incision length for both groups was 5cm (P=0.72). LOS was 3.7d for the SIL group, which was >1d shorter than that for the LAP group (5.0d; P<0.05). Pain score at post-anesthesia care unit discharge and total amount of narcotic pain medication delivered in the post-anesthesia care unit was significantly less in the SIL group (P<0.05), as was maximum visual analog scale pain score on postoperative day 1 and postoperative day 2 (P≤0.01)., Conclusions: SIL sigmoid colectomy is associated with noncosmetic benefits, including a reduction in early postoperative pain and decreased LOS. These findings may be related to reduced abdominal wall trauma., (Copyright © 2013 Elsevier Inc. All rights reserved.)
- Published
- 2013
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33. Traumatic abdominal wall hernia: Is the treatment strategy a real problem?
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Liasis L, Tierris I, Lazarioti F, Clark CC, and Papaconstantinou HT
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- Abdominal Wall, Humans, Abdominal Injuries complications, Abdominal Injuries diagnosis, Abdominal Injuries surgery, Hernia, Ventral diagnosis, Hernia, Ventral etiology, Hernia, Ventral surgery, Herniorrhaphy methods, Practice Guidelines as Topic
- Published
- 2013
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34. The impact of MRSA colonization on surgical site infection following major gastrointestinal surgery.
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Ramirez MC, Marchessault M, Govednik-Horny C, Jupiter D, and Papaconstantinou HT
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- Adolescent, Adult, Aged, Aged, 80 and over, Female, Humans, Incidence, Length of Stay statistics & numerical data, Linear Models, Logistic Models, Male, Middle Aged, Multivariate Analysis, Odds Ratio, Preoperative Care, Retrospective Studies, Risk Factors, Staphylococcal Infections epidemiology, Surgical Wound Infection epidemiology, Young Adult, Digestive System Surgical Procedures mortality, Methicillin-Resistant Staphylococcus aureus isolation & purification, Nasal Mucosa microbiology, Staphylococcal Infections microbiology, Surgical Wound Infection microbiology
- Abstract
Purpose: The purpose of this study is to determine whether methicillin-resistant Staphylococcus aureus (MRSA) colonization affects surgical site infections (SSI) after major gastrointestinal (GI) operations., Methods: We retrospectively reviewed the charts of all patients undergoing major GI surgery from December 2007 to August 2009. All patients were tested for MRSA colonization and grouped according to results (MRSA+, methicillin-sensitive S. aureus [MSSA]+, and negative). Data analyzed included demographics, incidence of SSI, and wound culture results., Results: A total of 1,137 patients were identified; 78.9 % negative, 14.7 % MSSA+, and 6.4 % MRSA+. The mean age was 59.5 years, 44.5 % of the patients were men, and 47.9 % of the patients underwent colorectal operation. SSI was identified in 101 (8.9 %) patients and was higher in the MRSA+ group than the negative and MSSA+ groups (13.7 vs. 9.4 vs. 4.2 %; p < 0.05). Although MRSA colonization had an odds ratio of 1.43 for developing an SSI, it was not a significant independent risk factor. However, the MRSA+ group was strongly associated with MRSA cultured from the wound when SSI was present (70 vs. 8.5 %; p < 0.0001)., Conclusions: MRSA colonization is not an independent risk factor for SSI following major GI operations; however, it is strongly predictive of MRSA-associated SSI in these patients. Preoperative MRSA nasal swab test with decolonization may reduce the incidence of MRSA-associated SSI after major GI surgery.
- Published
- 2013
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35. Rectal prolapse in the elderly: trends in surgical management and outcomes from the American College of Surgeons National Surgical Quality Improvement Program database.
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Clark CE 3rd, Jupiter DC, Thomas JS, and Papaconstantinou HT
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- Aged, Aged, 80 and over, Databases, Factual, Digestive System Surgical Procedures methods, Female, Humans, Length of Stay statistics & numerical data, Logistic Models, Male, Operative Time, Postoperative Complications epidemiology, Quality Improvement, Treatment Outcome, Digestive System Surgical Procedures trends, Laparoscopy trends, Perineum surgery, Rectal Prolapse surgery, Rectum surgery
- Abstract
Background: Full thickness rectal prolapse (FTRP) is managed with an abdominal or perineal operation. Traditionally, the approach has been determined by patient age and comorbidities. Our aim was to determine operative trends and outcomes for repair of FTRP in elderly patients using the American College of Surgeons National Surgical Quality Improvement Program (ACS NSQIP) database., Study Design: We queried the ACS NSQIP database from 2006 to 2009 for patients with FTRP who were 70 years of age or older. Patients were grouped according to type of surgical repair: laparoscopic (LR), open (OR), or perineal (PR) technique. We reviewed demographics, operative trends of surgical technique, and short-term outcomes for each group., Results: A total of 816 patients were analyzed; 596 (73%) PR, 130 (16%) OR, and 90 (11%) LR patients. Patients who received OR and LR had lower mean American Society of Anesthesiologists (ASA) scores than PR patients (2.6, 2.5, and 2.7, respectively, p < 0.001). The percentage of LR and OR procedures decreased as age increased by decade; the inverse was seen for PR (p < 0.001). The distribution of operative techniques has not changed from year to year. Length of stay was significantly shorter for LR (3.77 days) and PR (3.44 days) patients vs OR patients (6.23 days) (p = 0.01). Complication rates were 2.22%, 8.72%, and 12.31% for LR, PR, and OR, respectively (p = 0.021). Open surgery was the only factor associated with an increased complication rate, with an odds ratio of 6.29 (95% CI 1.38 to 28.6, p < 0.02)., Conclusions: Despite the appeal of perineal proctectomy in the elderly and debilitated patient, the approach to FTRP is slowly evolving in the era of laparoscopic surgery. Laparoscopic repair of FTRP in the elderly is associated with improved short-term outcomes when compared with OR and PR., (Copyright © 2012 American College of Surgeons. Published by Elsevier Inc. All rights reserved.)
- Published
- 2012
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36. The evidence for single-incision laparoscopic colectomy: is it time to adopt?
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Clark CE, Liasis L, and Papaconstantinou HT
- Subjects
- Colectomy education, Colectomy instrumentation, Colectomy trends, Colonic Neoplasms surgery, Equipment Design, Forecasting, Humans, Treatment Outcome, Colectomy methods, Laparoscopy methods
- Abstract
Laparoscopic colorectal surgery has advantages over open surgery including shorter postoperative length of hospital stay, early return of bowel function, decreased complications and reduced postoperative pain. Innovative minimally invasive surgery techniques such as single-incision laparoscopic surgery (SIL) have emerged to further enhance outcomes of conventional laparoscopy. This technique uses a single small incision for access of all instruments and specimen extraction. This concept has been proposed to improve cosmesis and enhance recovery. Technological advances have been introduced to overcome the challenges of co-axial instrument movement and collision that is inherent to SIL surgery. The application of SIL techniques to colorectal surgery is in its infancy, but gaining significant momentum. Early case reports and series have shown feasibility and safety. Emerging comparative studies of SIL colectomy to standard laparoscopic techniques are providing evidence of equivalency with potential benefit in outcomes such as reduced early postoperative pain and shortened length of hospital stay. The application of the SIL platform to robotics and transanal surgery demonstrates the broadening scope of this innovative field. However, we must be cognizant of the impact on surgeon training and resident education. In this review we present the current evidence supporting the application of SIL to colorectal surgery.
- Published
- 2012
37. Single-incision versus standard multiport laparoscopic colectomy: a multicenter, case-controlled comparison.
- Author
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Champagne BJ, Papaconstantinou HT, Parmar SS, Nagle DA, Young-Fadok TM, Lee EC, and Delaney CP
- Subjects
- Adolescent, Adult, Aged, Aged, 80 and over, Case-Control Studies, Colitis, Ulcerative surgery, Crohn Disease surgery, Diverticulitis, Colonic surgery, Feasibility Studies, Female, Gastrointestinal Hemorrhage surgery, Humans, Length of Stay, Male, Middle Aged, Pain, Postoperative etiology, Postoperative Complications etiology, Young Adult, Colectomy methods, Colonic Diseases surgery, Colonic Neoplasms surgery, Colonic Polyps surgery, Laparoscopy methods
- Abstract
Objective: The aim of this study was to compare single-incision laparoscopic colectomy (SILC) to multiport laparoscopic colectomy (MLC) when performed by experienced laparoscopic surgeons., Background: Recent case reports and single institution series have demonstrated the feasibility of SILC. Few comparative studies for MLC and SILC have been reported., Methods: Patients from 5 institutions undergoing SILC were entered into an IRB approved database from November 2008 to March 2010. SILC patients were matched with those undergoing MLC for gender, age, disease, surgery, BMI, and surgeon. The primary endpoint was length of stay and secondary endpoints included operative time, conversion, complications and postoperative pain scores., Results: Three hundred thirty patients (SILC = 165, MLC = 165) were evaluated. Operative time (135 ± 45 min vs. 133 ± 56 min; P = 0.85) and length of stay (4.6 ± 1.6 vs. 4.3 ± 1.4; P = 0.35) were not significantly different. Maximum postoperative day one pain scores were significantly less for SILC (4.9 vs. 5.6; P = 0.005). Eighteen (11%) patients undergoing SILC were converted to multiport laparoscopy. There was no statistical difference between groups for conversions to laparotomy, complications, re-operations, or re-admissions., Conclusions: SILC is feasible when performed on select patients by surgeons with extensive laparoscopic experience. Outcomes were similar to MLC, except for a reduction in peak pain score on the first postoperative day. Prospective randomized trials should be performed before incorporation of this technology into routine surgical care.
- Published
- 2012
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38. Single-incision laparoscopic colectomy for cancer: assessment of oncologic resection and short-term outcomes in a case-matched comparison with standard laparoscopy.
- Author
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Papaconstantinou HT and Thomas JS
- Subjects
- Adult, Aged, Aged, 80 and over, Colonic Neoplasms pathology, Disease-Free Survival, Female, Humans, Length of Stay, Lymph Node Excision, Male, Middle Aged, Minimally Invasive Surgical Procedures methods, Neoplasm Recurrence, Local pathology, Retrospective Studies, Time Factors, Treatment Outcome, Colectomy methods, Colonic Neoplasms surgery, Laparoscopy methods
- Abstract
Purpose: To compare single-incision laparoscopic (SIL) with multiport laparoscopic (LAP) colectomy in patients with colon cancer to assess oncologic resection and 1-year outcomes., Methods: We compared patients who underwent SIL colectomy for colon cancer with an equal number of case-matched LAP colectomy patients based on age, gender, body mass index (BMI), American Society of Anesthesiologists (ASA) score, previous abdominal operations, and operation type. Results of oncologic resection included lymph node (LN) yield and margins. One-year outcomes included cancer recurrence and death., Results: Twenty-six patients were identified for SIL and LAP colectomy groups with no differences in case matching (age, P = .70; gender, P > .99; BMI, P = .74; ASA score, P > .99; previous abdominal operation, P > .99; and operation-type, P > .99). Oncologic resection was similar for both groups. Mean LN yield was 17 (P = .88). There were no positive margins and 2 (8%) patients had proximal/distal margin of <5 cm in each group. The mean follow-up was 13 and 21 months for the SIL and LAP groups, respectively (P < .001), with 2(8%) recurrences in each group, and no port-site recurrences or deaths. Disease-free survival at 1 year was 92% for both groups., Conclusion: These data suggest that SIL colectomy for cancer provides equivalent oncologic resection and 1-year outcomes compared with a standard LAP technique. Further studies are required to determine long-term oncologic outcomes, including recurrence and survival rates., (Copyright © 2011 Mosby, Inc. All rights reserved.)
- Published
- 2011
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39. Single-incision laparoscopic right colectomy: a case-matched comparison with standard laparoscopic and hand-assisted laparoscopic techniques.
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Papaconstantinou HT, Sharp N, and Thomas JS
- Subjects
- Adult, Aged, Aged, 80 and over, Colonic Diseases mortality, Colonic Diseases pathology, Female, Humans, Length of Stay, Male, Middle Aged, Pain, Postoperative epidemiology, Retrospective Studies, Surgical Wound Infection epidemiology, Treatment Outcome, Colectomy adverse effects, Colectomy methods, Colonic Diseases surgery, Laparoscopy adverse effects, Laparoscopy methods
- Abstract
Background: Single-incision laparoscopic (SIL) colectomy is an advance in minimally invasive colorectal surgical techniques. Feasibility and safety of SIL colectomy has been reported; however, benefits and outcomes are not well-defined. The purpose of this study was to compare outcomes of SIL right colectomy with multiport laparoscopic (LAP) and hand-assisted laparoscopic (HAL) techniques., Methods: SIL right colectomy cases performed between August 2009 and April 2010 were case-matched for age, sex, body mass index, American Society of Anesthesiologists score, previous abdominal surgery, and pathology to an equivalent number of LAP and HAL right colectomy cases. Data analyzed included operative time, procedure conversion, incision length, length of hospital stay, 30-day hospital readmission, surgical site infection and maximum postoperative pain score., Results: Twenty-nine patients were analyzed in each of 3 groups (SIL, LAP, and HAL). The mean age (p = 0.96), body mass index (p = 0.48), American Society of Anesthesiologists score (p = 0.74), and rate of previous abdominal operation (p = 0.95) were similar, and sex and pathology were identical among groups. Operative time and conversion rates were similar. The incision length for SIL (4.5 cm) and LAP (5.1 cm) groups was similar, and both were significantly shorter than HAL group (7.2 cm; p < 0.001). Length of hospital stay was 3.4 days for the SIL group and was more than 1-day shorter than LAP and HAL groups (p < 0.05). Postoperative surgical site infection and hospital readmission were similar among groups. Maximum pain score on postoperative days 1 and 2 was significantly lower in SIL group (p < 0.05)., Conclusions: SIL right colectomy can improve patient recovery through a decrease in early postoperative pain and shorter length of hospital stay when compared with established laparoscopic techniques., (Copyright © 2011 American College of Surgeons. Published by Elsevier Inc. All rights reserved.)
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- 2011
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40. Robot-assisted posterior retroperitoneoscopic adrenalectomy.
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Ludwig AT, Wagner KR, Lowry PS, Papaconstantinou HT, and Lairmore TC
- Subjects
- Aged, Aged, 80 and over, Demography, Dissection, Female, Humans, Male, Middle Aged, Time Factors, Adrenalectomy methods, Retroperitoneal Space surgery, Robotics methods
- Abstract
Background and Purpose: Minimally invasive adrenalectomy is the preferred surgical approach for small, benign adrenal neoplasms. Posterior retroperitoneoscopic adrenalectomy is associated with potential surgical advantages. We sought to investigate the feasibility and early outcomes for robot-assisted posterior adrenalectomy, which has not been previously reported., Patients and Methods: Patients were selected for adrenalectomy based on standard clinical indications. The study was conducted under a protocol approved by the Institutional Review Board. Patients with adrenal masses larger than 7.0 cm, or with a body mass index (BMI) greater than 40, were excluded. Patient demographics, clinical and pathologic data, operative times, and patient outcomes were collected prospectively., Results: Six consecutive patients underwent robot-assisted posterior retroperitoneoscopic adrenalectomy (RAPRA) between June 23, 2009 and January 21, 2010. Five women and one man, ages 45 to 75 years (mean 55.5 years), with a mean BMI of 30, were included. There were three right adrenal tumors and three left adrenal tumors. Mean operative time was 121 minutes with a mean robot time of 57 minutes for the five patients in whom the entire adrenal dissection was performed robotically. There was essentially no morbidity and no mortality., Conclusion: This study represents the first report of RAPRA, and demonstrates the feasibility of performing this procedure with good patient outcomes.
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- 2010
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41. Management of serrated adenomas and hyperplastic polyps.
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Bauer VP and Papaconstantinou HT
- Abstract
The benign serrated architecture of the hyperplastic polyp has now been recognized in morphologically similar lesions with potential for transformation to colorectal carcinoma: the sessile serrated adenoma (SSA), traditional serrated adenoma (TSA), and mixed polyp. These represent a group of serrated polyps with potential to evolve into colorectal cancer through a different molecular pathway than the traditional adenoma-carcinoma sequence, called the serrated pathway. Genetic characteristics involve a defect in apoptosis caused by BRAF and K-ras mutations that create distinct histologic characteristics of atypia in serrated architectural distortion of the crypts. An evidence-based algorithm for the clinical management of this polyp has yet to be determined. Current recommendations suggest these lesions be managed similar to conventional adenomas. The histology of serrated polyps is reviewed, as well as the common characteristics, and implications for treatment and surveillance.
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- 2008
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42. Management of the malignant polyp.
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Ramirez M, Schierling S, Papaconstantinou HT, and Thomas JS
- Abstract
In the United States, the prevalence of adenomatous polyps found during colonoscopic evaluation ranges from 25 to 41%, and of these, 2 to 5% contain invasive malignancy. The management of the malignant polyp continues to be challenging. Endoscopic resection by polypectomy has been shown to be sufficient for management of certain polyps containing cancer; however, it is important to keep in mind that polypectomy does not remove the lymph node drainage basin and may be an inadequate resection for some adenocarcinoma containing polyps that have specific histologic features. Depth of invasion has been shown to correlate with the risk of lymph node metastasis. Other unfavorable histologic features include lymphovascular invasion, poor differentiation, inability to assess margin (piecemeal resection), and positive resection margin (< 2 mm); these are important factors to consider in management. For these patients formal oncologic surgical resection is indicated. Traditional open or laparoscopic procedures are routinely used for colectomy in these patients. Following polypectomy or segmental colectomy, surveillance of these patients is critical, and can lead to excellent long-term outcomes.
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- 2008
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43. Perineal wound complications after abdominoperineal resection.
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Wiatrek RL, Thomas JS, and Papaconstantinou HT
- Abstract
Perineal wound complications following abdominoperineal resection (APR) is a common occurrence. Risk factors such as operative technique, preoperative radiation therapy, and indication for surgery (i.e., rectal cancer, anal cancer, or inflammatory bowel disease [IBD]) are strong predictors of these complications. Patient risk factors include diabetes, obesity, and smoking. Intraoperative perineal wound management has evolved from open wound packing to primary closure with closed suctioned transabdominal pelvic drains. Wide excision is used to gain local control in cancer patients, and coupled with the increased use of pelvic radiation therapy, we have experienced increased challenges with primary closure of the perineal wound. Tissue transfer techniques such as omental pedicle flaps, and vertical rectus abdominis and gracilis muscle or myocutaneous flaps are being used to reconstruct large perineal defects and decrease the incidence of perineal wound complications. Wound failure is frequently managed by wet to dry dressing changes, but can result in prolonged hospital stay, hospital readmission, home nursing wound care needs, and the expenditure of significant medical costs. Adjuvant therapies to conservative wound care have been suggested, but evidence is still lacking. The use of the vacuum-assisted closure device has shown promise in chronic soft tissue wounds; however, experience is lacking, and is likely due to the difficulty in application techniques.
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- 2008
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44. Occult perineal endometrioma diagnosed by endoanal ultrasound and treated by excision: a report of 3 cases.
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McCormick JT, Read TE, Akbari RP, Sklow B, Papaconstantinou HT, Geyer S, O'Keefe L, and Caushaj PF
- Subjects
- Adult, Anus Diseases pathology, Anus Diseases surgery, Diagnosis, Differential, Endometriosis pathology, Episiotomy, Female, Humans, Pain etiology, Perineum, Premenopause, Time Factors, Treatment Outcome, Anal Canal diagnostic imaging, Anus Diseases diagnostic imaging, Endometriosis diagnostic imaging, Endosonography methods
- Abstract
Background: Isolated perineal endometrioma is a rare entity and often causes diagnostic uncertainty., Cases: Three premenopausal women, none with a prior history of endometriosis, presented with vague perineal pain 3-6 months following obstetric delivery with episiotomy. The latency periods between the onset of symptoms and definitive diagnosis were 3 months, 18 months and 3 years despite multiple physician evaluations in the interim. Patient presentation and management were virtually identical in all cases. Detailed questioning revealed that the pain was located adjacent to the episiotomy incision and waxed and waned with menses. Physical examination revealed a vague fullness adjacent to the episiotomy incision. Endoanal ultrasound revealed a mass of mixed echogenicity adjacent to the external anal sphincter. Transperineal exploration revealed a tumor with the gross appearance of an endometrioma, which was confirmed histologically. Excision of the mass with preservation of the anal sphincter muscle resulted in resolution of symptoms in all patients without the need for hormonal manipulation. No patient suffered diminution of fecal continence., Conclusion: Occult perineal endometriosis should be considered when a woman presents with cyclic pain in the perineum following delivery and episiotomy. Endoanal ultrasound can assist with the diagnosis. Transperineal excision with sparing of the anal sphincter can be curative, without compromising continence.
- Published
- 2007
45. Bacterial colitis.
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Papaconstantinou HT and Thomas JS
- Abstract
Bacterial colitis results in an inflammatory-type diarrhea that is characterized by bloody, purulent, and mucoid stool. These diseases have been designated as bacterial hemorrhagic enterocolitis. Associated symptoms include fever, tenesmus, and severe abdominal pain. The pathologic changes range from superficial exudative enterocolitis to a transmural enterocolitis with ulceration. Common pathologic bacteria causing bacterial colitis include Campylobacter, Salmonella, Shigella, Escherichia, and Yersinia species. The primary source of transmission is fecal-oral spread and ingestion of contaminated food and water. Although detailed history and identification of specific risk factors assist in the diagnosis, definitive diagnosis requires bacterial identification. Therefore, the physician must be familiar with the disease pathophysiology, epidemiology, and specific diagnostic modalities for clinical diagnosis and management. Specific tests are used to detect enteric pathogens and include stool and rectal swab culture, histology, and identification of specific bacterial toxins. Although many of these bacterial colitis infections are self-limiting, antibiotics should be used for high-risk patients and patients with complicated disease.
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- 2007
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46. Identification of apoptotic genes mediating TGF-beta/Smad3-induced cell death in intestinal epithelial cells using a genomic approach.
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Cao Y, Chen L, Zhang W, Liu Y, Papaconstantinou HT, Bush CR, Townsend CM Jr, Thompson EA, and Ko TC
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- Animals, Apoptosis drug effects, Caspase 3 drug effects, Caspase 3 genetics, Cell Line, DNA Fragmentation, Intestinal Mucosa cytology, Intestinal Mucosa drug effects, Oligonucleotide Array Sequence Analysis, RNA genetics, RNA isolation & purification, Apoptosis physiology, Cell Death drug effects, Intestinal Mucosa physiology, Smad3 Protein physiology, Transforming Growth Factor beta pharmacology
- Abstract
Transforming growth factor (TGF)-beta-dependent apoptosis is important in the elimination of damaged or abnormal cells from normal tissues in vivo. Previously, we have shown that TGF-beta inhibits the growth of rat intestinal epithelial (RIE)-1 cells. However, RIE-1 cells are relatively resistant to TGF-beta-induced apoptosis due to a low endogenous Smad3-to-Akt ratio. Overexpression of Smad3 sensitizes RIE-1 cells (RIE-1/Smad3) to TGF-beta-induced apoptosis by altering the Smad3-to-Akt ratio in favor of apoptosis. In this study, we utilized a genomic approach to identify potential downstream target genes that are regulated by TGF-beta/Smad3. Total RNA samples were analyzed using Affymetrix oligonucleotide microarrays. We found that TGF-beta regulated 518 probe sets corresponding to its target genes. Interestingly, among the known apoptotic genes included in the microarray analyses, only caspase-3 was induced, which was confirmed by real-time RT-PCR. Furthermore, TGF-beta activated caspase-3 through protein cleavage. Upstream of caspase-3, TGF-beta induced mitochondrial depolarization, cytochrome c release, and cleavage of caspase-9, which suggests that the intrinsic apoptotic pathway mediates TGF-beta-induced apoptosis in RIE-1/Smad3 cells.
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- 2007
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47. Academic appointment and the process of promotion and tenure.
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Papaconstantinou HT and Lairmore TC
- Abstract
A critical component of a successful academic career is the understanding of institutional criteria and guidelines for academic appointment, promotion, and tenure. It is important to point out that these criteria and guidelines may vary from institution to institution; however, they are uniform for all clinical faculty within a single institution and do not differ from department to department. The purpose of this article is to provide the aspiring academic colon and rectal surgeon with a basic understanding of academic faculty appointments, promotion, and tenure.
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- 2006
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48. Salvage abdominoperineal resection after failed Nigro protocol: modest success, major morbidity.
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Papaconstantinou HT, Bullard KM, Rothenberger DA, and Madoff RD
- Subjects
- Adult, Aged, Anus Neoplasms drug therapy, Anus Neoplasms radiotherapy, Carcinoma, Squamous Cell drug therapy, Carcinoma, Squamous Cell radiotherapy, Female, Humans, Male, Middle Aged, Morbidity, Surgical Flaps, Survival Analysis, Treatment Failure, Anus Neoplasms surgery, Carcinoma, Squamous Cell surgery, Salvage Therapy
- Abstract
Objective: Chemotherapy and radiation (C-XRT) is the first-line therapy for epidermoid carcinomas of the anal canal (ECAC). Treatment failure occurs in up to 33% of patients. Salvage-abdominoperineal resection (APR) is the treatment of choice for locoregional failure but pre-operative radiation may increase wound complications. The purpose of this study was to evaluate patient survival and wound complications after salvage-APR for C-XRT failure., Methods: We reviewed the clinical records of all patients who failed initial C-XRT for ECAC diagnosed between 1992 and 2002. We evaluated patient demographics, treatment, tumour characteristics, survival and postoperative complications., Results: Nineteen patients were identified. The mean age at diagnosis was 55 years. Eight (42%) patients had persistent disease; 11 (58%) had tumour recurrence. APR was performed in 15 patients. Perineal wound complications occurred in 12 (80%) patients; half were major complications. Primary flap reconstruction at time of APR was performed in 5 (33%) patients; 2 experienced major wound complications. Overall-survival after salvage APR was 40% (6/15) and disease-free survival was 47% (7/15) at a median follow-up of 14 months (range 2-95 months). Recurrence after salvage-APR occurred in 7 (47%) patients at a median follow-up of 5 months (range 3-19 months). Kaplan-Meier survival analysis showed an advantage for recurrent over persistent disease with 2-year and 5-year survival rates of 75%vs 34% and 28%vs 0%, respectively., Conclusions: Failure of C-XRT for ECAC is associated with a poor prognosis. Although salvage APR may be curative in some patients, perineal wound complications are frequent and primary flap reconstruction is not reliable.
- Published
- 2006
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49. Screening methods for high-grade dysplasia in patients with anal condyloma.
- Author
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Papaconstantinou HT, Lee AJ, Simmang CL, Ashfaq R, Gokaslan ST, Sokol S, Huber PJ Jr, and Gregorcyk SG
- Subjects
- Adult, Biopsy, Female, Humans, Male, Mass Screening, Middle Aged, Risk Assessment, Sensitivity and Specificity, Anal Canal pathology, Anus Diseases pathology, Anus Neoplasms pathology, Condylomata Acuminata pathology, Papillomaviridae, Papillomavirus Infections pathology, Tumor Virus Infections pathology
- Abstract
Unlabelled: Human papilloma virus (HPV) is one of the most common sexually transmitted diseases in the United States. HPV infection can cause anal condylomas and is a risk factor for dysplasia. High-grade dysplasia may progress to squamous cell carcinoma. Currently, biopsy and histological examination are required to grade dysplasia. The purpose of this study is to determine whether anal cytology, morphological characteristics, and/or the presence of high-risk oncogenic HPV-types are effective noninvasive methods to detect high-risk anal condylomas., Patients and Methods: From November 2003 to June 2004, all patients with anal condyloma were prospectively evaluated for anal cytology, high-risk oncogenic HPV-types, and tissue biopsies. The Bethesda classification system was used to classify cytologic findings and histological examination, which were grouped as high-risk (HRL) and low-risk (LRL) lesions. Histology results served as true disease for all comparisons., Results: Forty-seven patients with anal condyloma were studied; 43 (91.5%) were men, and the mean age was 39 +/- 11 years. Histology showed 19 (40.5%) patients with HRL, and 28 (59.5%) patients with LRL. Cytology correctly identified 8 patients with HRL and 27 patients with LRL (sensitivity 42% and specificity 96%). High-risk oncogenic HPV-types were found in 84.2% of HRL and 39.3% of LRL (P = 0.0029). Combining cytology with oncogenic HPV-testing, the sensitivity of detecting HRL increased to 89%, and specificity decreased to 42%., Conclusion: Anal cytology alone is not accurate for detecting HRL in patients with anal condylomas. Combining oncogenic HPV-testing with cytology is more sensitive in detecting HRL in patients with anal condyloma, and therefore, a more effective screening tool.
- Published
- 2005
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50. De novo colorectal cancer: five-year survival is markedly lower in transplant recipients compared with the general population.
- Author
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Buell JF, Papaconstantinou HT, Skalow B, Hanaway MJ, Alloway RR, and Woodle ES
- Subjects
- Aged, Colorectal Neoplasms pathology, Heart Transplantation mortality, Humans, Kidney Transplantation mortality, Liver Transplantation mortality, Lung Transplantation mortality, Middle Aged, Neoplasm Staging, Survival Analysis, Time Factors, Colorectal Neoplasms mortality, Transplantation mortality
- Abstract
Introduction: The biological behavior of most solid tumors in transplant recipients has not been adequately compared to the general population. The purpose of the present study was to compare outcomes in de novo colorectal cancer (CRC) following solid organ transplantation to those observed in the general population (SEER) database., Methods: All transplant recipients with de novo CRC in the Israel Penn International Transplant Tumor Registry were identified and analyzed and the data were compared to CRC patients in the SEER National Cancer Institute (NCI) database., Results: One hundred and fifty transplant recipients with de novo CRC were identified, among which were 93 (62%) kidney, 29 (19.3%) heart, 27 (18%) liver, and 1 (0.7%) lung recipients. Median age of transplant recipients was 54 years, compared to a median age of 72 years for patients in the SEER NCI database. However, compared to patients from the SEER NCI database, recipients with Duke's A through C stage disease were noted to experience a significant decrease in 5-year survival. The results in Duke's C patients were particularly dismal., Conclusions: The early age at presentation of CRC in transplant recipients suggests that the development of de novo CRC may be effected by immunosuppression. Decreased 5-year survival rates in transplant recipients compared to the general population suggest that CRC in transplant patients is biologically more aggressive. These data cannot distinguish whether the lower survival rates are because the CRC are inherently biologically more aggressive or whether immunosuppression allows for more aggressive clinical behavior of CRC.
- Published
- 2005
- Full Text
- View/download PDF
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