30 results on '"Randhawa SK"'
Search Results
2. Patient, Facility and Surgical Factors Associated with Significant Delays to Esophagectomy and Subsequent Poor Outcomes: An Analysis of 16,486 Cases.
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Stuart CM, Dyas AR, Yee EJ, Thielen O, Bronsert MR, Mungo B, McCarter MD, Randhawa SK, David EA, Michell JD, and Meguid RA
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Objective: Delays to definitive surgery in esophageal cancer may be associated with disease progression and worsened survival. The objective of this study was to perform a national assessment for predictors of delay to esophagectomy and to assess for their impact on oncologic and survival outcomes., Methods: The National Cancer Database, 2010-2020, was queried for patients with locally advanced esophageal adenocarcinoma (Stage I-III). Patients were divided into upfront and post-neoadjuvant chemoradiation (nCRT) cohorts. The primary outcome was time-to-surgery. Time-to-surgery was examined as a continuous and categorical variable, where patients were divided into timely and delayed cohorts (96 days for upfront cohort; 56 days for post-nCRT cohort)., Results: Of 16,486 patients, 4,066 (24.7%) underwent upfront surgery and 12,420 (75.3%) post-nCRT surgery. In the upfront surgery group, median [interquartile range] time-to-surgery was 61 [40-96] days. Risk-adjusted predictors of delay included lack of insurance, lowest quartile of education, biopsy-based staging or surgical staging and robotic-assisted approach. In the post-nCRT cohort time-to-surgery was 55 [44-70] days. Risk-adjusted predictors of delay included Hispanic ethnicity, Medicaid or other government-based insurance, lowest quartile of educational status, and robotic approach. In the upfront surgery group, patients who had delayed surgery had increased odds of pathologic upstaging (1.31, 95% confidence interval 1.06-1.61). In the post-nCRT group, patients with surgical delay had increased odds of 90-day mortality (1.27, 95% confidence interval 1.06-1.51)., Conclusions: Following risk-adjustment for patient, oncologic, facility and surgical characteristics, there were several predictors of increased time to esophagectomy associated with consequences of upstaging and survival., (Copyright © 2024. Published by Elsevier Inc.)
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- 2024
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3. Risk-adjusted discrete increases in length of stay by complication following anatomic lung resection: an analysis of 32 133 cases across the USA.
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Stuart CM, Bronsert MR, Dyas AR, Mott NM, Healy GL, Anioke T, Henderson WG, Randhawa SK, David EA, Mitchell JD, and Meguid RA
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- Humans, Male, Female, Middle Aged, United States epidemiology, Aged, Risk Factors, Retrospective Studies, Length of Stay statistics & numerical data, Postoperative Complications epidemiology, Postoperative Complications etiology, Pneumonectomy adverse effects
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Objectives: Prior studies have associated morbidity following anatomic lung resection with prolonged postoperative length of stay; however, each complication's individual impact on length of stay as a continuous variable has not been studied. The purpose of this study was to determine the risk-adjusted increase in length of stay associated with each individual postoperative complications following anatomic lung resection., Methods: Patients who underwent anatomic lung resection cataloged in the prospectively collected American College of Surgeons National Surgical Quality Improvement Program participant use file, 2005-2018, were targeted. The association between preoperative characteristics, postoperative complications and length of stay in days was tested. A negative binomial model adjusting for the effect of preoperative characteristics and 18 concurrent postoperative complications was used to generate incidence rate ratios. This model was fit to generate risk-adjusted increases in length of stay by complication., Results: Of 32 133 patients, 5065 patients (15.8%) experienced at least one post-operative complication. The most frequent complications were pneumonia (n = 1829, 5.7%), the need for transfusion (n = 1794, 5.6%) and unplanned reintubation (n = 1064, 3.3%). The occurrence of each of the 18 individual complications was associated with significantly increased length of stay. This finding persisted after risk-adjustment, with the greatest risk-adjusted increases being associated with prolonged ventilation (+17.4 days), followed by septic shock (+17.2 days), acute renal failure (+16.5 days) and deep surgical site infection (+13.2 days)., Conclusions: All 18 postoperative complications studied following anatomic lung resection were associated with significant risk-adjusted increases in length of stay, ranging from an increase of 17.4 days with prolonged ventilation to 2.6 days following the need for transfusion., (© The Author(s) 2024. Published by Oxford University Press on behalf of the European Association for Cardio-Thoracic Surgery. All rights reserved.)
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- 2024
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4. Analyzing the impact of the Coronavirus disease 2019 pandemic on initial oncologic presentation and treatment of non-small cell lung cancer in the United States.
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Dyas AR, Bronsert MR, Stuart CM, Thomas MB, Schulick RD, Franco SR, Gleisner A, Randhawa SK, David EA, Mitchell JD, and Meguid RA
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- Humans, Male, Female, Retrospective Studies, United States epidemiology, Aged, Middle Aged, Neoplasm Staging, SARS-CoV-2, Pandemics, Pneumonectomy statistics & numerical data, COVID-19 epidemiology, COVID-19 therapy, Carcinoma, Non-Small-Cell Lung therapy, Carcinoma, Non-Small-Cell Lung epidemiology, Carcinoma, Non-Small-Cell Lung pathology, Lung Neoplasms therapy, Lung Neoplasms epidemiology, Lung Neoplasms pathology
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Background: A significantly lower rate of non-small cell lung cancer (NSCLC) screening, greater health care avoidance, and changes to oncologic recommendations were some consequences of the Coronavirus disease 2019 (COVID-19) pandemic affecting the medical environment. We sought to determine how the health care environment during the COVID-19 pandemic affected the oncologic treatment of patients diagnosed with non-small cell lung cancer (NSCLC)., Methods: This was a retrospective cohort study evaluating patients with NSCLC in the National Cancer Database (2019-2020). Patients were divided into prepandemic (2019) and pandemic (2020) cohorts, and patient, oncologic, and treatment variables were compared. Multivariable logistic regression was performed to control for the impact of demographic characteristics on oncologic variables and the impact of oncologic variables on treatment variables., Results: The study population comprised 250,791 patients, including 114,533 patients (45.7%) in the pandemic cohort. There were 15% fewer new NSCLC diagnoses during the pandemic compared with prepandemic. Patients diagnosed during the pandemic had more advanced clinical TNM stage on presentation (P < .0001) and were more likely to have tumors in overlapping lobes or in a main bronchus (P = .0002). They were less likely to receive cancer treatment (P < .0001) and to undergo primary resection (P < .0001) and more likely to receive adjuvant systemic therapy (P = .004) and a combination of palliative treatment regimens (P < .0001). After risk adjustment, all these differences remained statistically significant (P < .05)., Conclusions: The COVID-19 pandemic was associated with increased clinical stage at presentation for patients with NSCLC, which impacted subsequent treatment strategies. However, treatment differed minimally when controlling for cancer stage. Future studies will examine the impact of these differences on overall survival and cancer-free survival., Competing Interests: Conflict of Interest Statement E.A.D. reports honoraria from Astra Zeneca. R.A.M. reports consulting fees from Medtronic (payments made to institution). The other authors have no conflicts of interest to report. The Journal policy requires editors and reviewers to disclose conflicts of interest and to decline handling or reviewing manuscripts for which they may have a conflict of interest. The editors and reviewers of this article have no conflicts of interest., (Copyright © 2023 The American Association for Thoracic Surgery. Published by Elsevier Inc. All rights reserved.)
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- 2024
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5. Dietary Commensal Wrestles Iron from Tumor Microenvironment to Activate Antitumoral Macrophages.
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Lee AH, Randhawa SK, and Meisel M
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- Humans, Animals, Iron metabolism, CD8-Positive T-Lymphocytes immunology, Macrophages immunology, Macrophages metabolism, Macrophages drug effects, Macrophage Activation drug effects, Macrophage Activation immunology, Neoplasms immunology, Neoplasms microbiology, Neoplasms pathology, Lactobacillus plantarum, Mice, Tumor-Associated Macrophages immunology, Tumor-Associated Macrophages metabolism, Tumor-Associated Macrophages drug effects, Diet, Tumor Microenvironment immunology, Tumor Microenvironment drug effects
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The microbiome dictates the response to cancer immunotherapy efficacy. However, the mechanisms of how the microbiota impacts therapy efficacy remain poorly understood. In a recent issue of Nature Immunology, Sharma and colleagues elucidate a multifaceted, macrophage-driven mechanism exerted by a specific strain of fermented food commensal plantarum strain IMB19, LpIMB19. LpIMB19 activates tumor macrophages, resulting in the enhancement of cytotoxic cluster differentiation 8 (CD8) T cells. LpIMB19 administration led to an expansion of tumor-infiltrating CD8 T cells and improved the efficacy of anti-PD-L1 therapy. Rhamnose-rich heteropolysaccharide, a strain-specific cell wall component, was identified as the primary effector molecule of LplMB19. Toll-like receptor 2 signaling and the ability of macrophages to sequester iron were both critical for rhamnose-rich heteropolysaccharide-mediated macrophage activation upstream of the CD8 T-cell effector response and contributed to tumor cell apoptosis through iron deprivation. These findings reveal a well-defined mechanism connecting diet and health outcomes, suggesting that diet-derived commensals may warrant further investigation. Additionally, this work emphasizes the importance of strain-specific differences in studying microbiome-cancer interactions and the concept of "nutritional immunity" to enhance microbe-triggered antitumor immunity., (©2024 American Association for Cancer Research.)
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- 2024
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6. Strict compliance to a thoracic enhanced recovery after surgery protocol is associated with improved outcomes compared with partial compliance: A prospective cohort study.
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Stuart CM, Dyas AR, Chanes N, Bronsert MR, Kelleher AD, Bata KE, Henderson WG, Randhawa SK, David EA, Mitchell JD, and Meguid RA
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- Humans, Prospective Studies, Female, Male, Middle Aged, Aged, Postoperative Complications epidemiology, Postoperative Complications etiology, Pneumonectomy adverse effects, Pneumonectomy methods, Length of Stay statistics & numerical data, Clinical Protocols, Guideline Adherence statistics & numerical data, Enhanced Recovery After Surgery
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Background: Benefits of thoracic enhanced recovery after surgery programs have been described. However, there is ongoing discussion on the importance of full protocol compliance. The objective of this study was to determine whether strict adherence to an enhanced recovery after surgery protocol leads to further improvement in outcomes compared with less strict compliance., Methods: This was a multihospital prospective cohort study of all consecutive anatomic lung resection patients on the thoracic enhanced recovery after surgery pathway from May 2021 to March 2023, with comparison with a historical control from January 2019 to April 2021. Compliance to 5 key protocol elements was tracked. Patients were grouped into high- and low-compliance cohorts, defined as adherence to 4-5/5 or 0-3/5 elements, respectively. The primary outcome was overall morbidity; secondary outcomes included cardiac, respiratory, and infectious morbidity and length of stay., Results: Of the 960 patients, 429 (44.7%) were enhanced recovery after surgery patients and 531 (55.3%) were in the historical control group. Across all patients, 250 (26.0%) were considered high compliance and 710 (74.0%) were considered low compliance. After adjustment for enhanced recovery after surgery status and confounders, the association between high compliance and improved outcomes persisted for all but infectious morbidity. Compared with low compliance, high compliance was associated with decreased odds of any morbidity (0.41 [95% CI, 0.22-0.77]), cardiac morbidity (0.31 [0.11-0.91]), respiratory morbidity (0.46 [0.23-0.90]) and decreased length of stay (0.38 [0.18-0.87])., Conclusion: Enhanced recovery after surgery protocols improve outcomes after anatomic lung resection. Increasing compliance to individual elements (>80%) further improves patient outcomes. Continued efforts should be directed at increasing compliance to individual protocol elements., (Copyright © 2024 Elsevier Inc. All rights reserved.)
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- 2024
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7. Robotic-assisted ectopic mediastinal parathyroidectomy: a single institution experience and operative review for the thoracic surgeon.
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Stuart CM, Chanes N, Dyas AR, Albuja Cruz MB, Raeburn CD, McIntyre RC Jr, Randhawa SK, David EA, Mitchell JD, and Meguid RA
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Background: Parathyroidectomy remains the only definitive cure for primary hyperparathyroidism (PHPT). In rare cases, ectopic hyperfunctioning glands are located in the mediastinum, necessitating a thoracic surgical approach. The objective of this project was to review a single high-volume institutional experience of this presentation, with specific attention to the use of a robotic-assisted thoracic surgery (RATS) approach., Methods: This was a single-center, 5-year retrospective cohort study. All patients who underwent RATS mediastinal mass resection (MMR) for PHPT at the University of Colorado Anschutz Medical Campus were targeted for inclusion. Patient cases were reviewed for demographics, history, operative data, laboratory values, and postoperative course., Results: Eight patients underwent RATS-MMR for PHPT between 2018-2023. Median [interquartile range] operative time was 178 [138-213] minutes, and length of stay was 2.0 [1.5-2.0] days. One patient experienced post-operative chylothorax requiring dietary modification. There were no other 30-day complications or readmissions. Final pathology confirmed intrathymic parathyroid tissue in all patients. All patients achieved cure of PHPT., Conclusions: The robotic-assisted approach has low morbidity and associated hospital length of stay and can be safely used to cure PHPT. As this is a rare pathology with an infrequently utilized surgical approach, it is important to critically discuss the diagnostic evaluation and operative course, aimed at educating the thoracic surgeon who may encounter and assist in the management of these patients., Competing Interests: Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at https://jtd.amegroups.com/article/view/10.21037/jtd-23-1920/coif). J.D.M. serves as an unpaid editorial board member of Journal of Thoracic Disease from April 2022 to March 2024. J.D.M. reports that he consults for Intuitive, Inc. C.M.S. receives salary support, in part, by the National Institutes of Health, under Ruth L. Kirschstein National Research Service Award T32CA17468. R.A.M. reports that he consults for Medtronic, Inc. The other authors have no conflicts of interest to declare., (2024 Journal of Thoracic Disease. All rights reserved.)
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- 2024
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8. The Effect of Laparoscopic Gastric Ischemic Preconditioning Prior to Esophagectomy on Anastomotic Stricture Rate and Comparison with Esophagectomy-Alone Controls.
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Stuart CM, Mott NM, Dyas AR, Byers S, Gergen AK, Mungo B, Stewart CL, McCarter MD, Randhawa SK, David EA, Mitchell JD, and Meguid RA
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- Humans, Male, Female, Middle Aged, Case-Control Studies, Aged, Follow-Up Studies, Stomach surgery, Stomach blood supply, Prognosis, Constriction, Pathologic etiology, Retrospective Studies, Anastomotic Leak etiology, Anastomotic Leak prevention & control, Esophagectomy adverse effects, Ischemic Preconditioning methods, Laparoscopy adverse effects, Laparoscopy methods, Esophageal Neoplasms surgery, Anastomosis, Surgical adverse effects, Postoperative Complications prevention & control, Postoperative Complications etiology, Esophageal Stenosis etiology, Esophageal Stenosis prevention & control
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Background: Benign anastomotic stricture is a recognized complication following esophagectomy. Laparoscopic gastric ischemic preconditioning (LGIP) prior to esophagectomy has been associated with decreased anastomotic leak rates; however, its effect on stricture and the need for subsequent endoscopic intervention is not well studied., Methods: This was a case-control study at an academic medical center using consecutive patients undergoing oncologic esophagectomies (July 2012-July 2022). Our institution initiated an LGIP protocol on 1 January 2021. The primary outcome was the occurrence of stricture within 1 year of esophagectomy, while secondary outcomes were stricture severity and frequency of interventions within the 6 months following stricture. Bivariable comparisons were performed using Chi-square, Fisher's exact, or Mann-Whitney U tests. Multivariable regression controlling for confounders was performed to generate risk-adjust odds ratios and to identify the independent effect of LGIP., Results: Of 253 esophagectomies, 42 (16.6%) underwent LGIP prior to esophagectomy. There were 45 (17.7%) anastomotic strictures requiring endoscopic intervention, including three patients who underwent LGIP and 42 who did not. Median time to stricture was 144 days. Those who underwent LGIP were significantly less likely to develop anastomotic stricture (7.1% vs. 19.9%; p = 0.048). After controlling for confounders, this difference was no longer significant (odds ratio 0.46, 95% confidence interval 0.14-1.82; p = 0.29). Of those who developed stricture, there was a trend toward less severe strictures and decreased need for endoscopic dilation in the LGIP group (all p < 0.20)., Conclusion: LGIP may reduce the rate and severity of symptomatic anastomotic stricture following esophagectomy. A multi-institutional trial evaluating the effect of LGIP on stricture and other anastomotic complications is warranted., (© 2024. Society of Surgical Oncology.)
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- 2024
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9. Representation of women among cardiothoracic surgery editorial boards: Trends over the past 2 decades.
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Stuart CM, Mott NM, Mungo AH, Meguid RA, Mitchell JD, Randhawa SK, Rove JY, and David EA
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Objective: The objective of this study was to examine representation of women on the editorial boards of cardiothoracic surgery-focused journals over the past 2 decades to identify changes over time compared with women cardiothoracic surgeon and trainee representation, and to highlight additional opportunities for improvement., Methods: The editorial boards of 2 high-impact cardiothoracic surgery journals were reviewed from 2000 to 2023. Data on editorial board positions, including editors-in-chief, associate/deputy editors, feature editors, and general members of the editorial board were abstracted. The proportion of women editors was assessed. Data were compared with publicly available information from the Association of American Medical Colleges on physician specialty by sex., Results: Of 3460 editorial positions, 332 (9.6%) were held by women. Women occupied 2.2% (1 out of 45) of editor-in-chief positions, 13.2% (78 out of 592) of senior editor positions, 11.5% (33 out of 287) of feature editor positions, and 8.3% (221 out of 2663) of general editorial board positions. The proportion of women holding any editorial board position significantly increased from 2.4% in 2000 to 18.2% in 2023 (P = .01). Overall, editorial board representation increased at a rate of 0.7% ± 1.3% per year, not significantly different from the growth of practicing women cardiothoracic surgeons at 0.3% ± 0.5% per year (P = .584)., Discussion: Representation of women on the editorial boards of cardiothoracic surgery-focused journals has increased commensurate with the increasing proportion of practicing women cardiothoracic surgeons, although remains at 16%. Work remains to continue the recruitment of women to cardiothoracic surgery as well as to identify the key elements that can support them in positions of leadership., Competing Interests: Conflict of Interest Statement The authors reported no conflicts of interest. The Journal policy requires editors and reviewers to disclose conflicts of interest and to decline handling or reviewing manuscripts for which they may have a conflict of interest. The editors and reviewers of this article have no conflicts of interest., (Copyright © 2024 The American Association for Thoracic Surgery. Published by Elsevier Inc. All rights reserved.)
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- 2024
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10. Anatomic Lung Resection Outcomes After Implementation of a Universal Thoracic ERAS Protocol Across a Diverse Health Care System.
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Dyas AR, Stuart CM, Bronsert MR, Kelleher AD, Bata KE, Cumbler EU, Erickson CJ, Blum MG, Vizena AS, Barker AR, Funk L, Sack K, Abrams BA, Randhawa SK, David EA, Mitchell JD, Weyant MJ, Scott CD, and Meguid RA
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- Humans, Female, Male, Aged, Prospective Studies, Middle Aged, Clinical Protocols, Length of Stay statistics & numerical data, Enhanced Recovery After Surgery, Pneumonectomy methods, Postoperative Complications epidemiology, Postoperative Complications prevention & control
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Objective: We sought to evaluate how implementing a thoracic enhanced recovery after surgery (ERAS) protocol impacted surgical outcomes after elective anatomic lung resection., Background: The effect of implementing the ERAS Society/European Society of Thoracic Surgery thoracic ERAS protocol on postoperative outcomes throughout an entire health care system has not yet been reported., Methods: This was a prospective cohort study within one health care system (January 2019-March, 2023). A thoracic ERAS protocol was implemented on May 1, 2021 for elective anatomic lung resections, and postoperative outcomes were tracked using the electronic health record and Vizient data. The primary outcome was overall morbidity; secondary outcomes included individual complications, length of stay, opioid use, chest tube duration, and total cost. Patients were grouped into pre-ERAS and post-ERAS cohorts. Bivariable comparisons were performed using independent t -test, χ 2 , or Fisher exact tests, and multivariable logistic regression was performed to control for confounders., Results: There were 1007 patients in the cohort; 450 (44.7%) were in the post-ERAS group. Mean age was 66.2 years; most patients were female (65.1%), white (83.8%), had a body mass index between 18.5 and 29.9 (69.7%), and were ASA class 3 (80.6%). Patients in the postimplementation group had lower risk-adjusted rates of any morbidity, respiratory complication, pneumonia, surgical site infection, arrhythmias, infections, opioid usage, ICU use, and shorter postoperative length of stay (all P <0.05)., Conclusions: Postoperative outcomes were improved after the implementation of an evidence-based thoracic ERAS protocol throughout the health care system. This study validates the ERAS Society/European Society of Thoracic Surgery guidelines and demonstrates that simultaneous multihospital implementation can be feasible and effective., (Copyright © 2024 Wolters Kluwer Health, Inc. All rights reserved.)
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- 2024
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11. Perioperative hypothermia in robotic-assisted thoracic surgery: Incidence, risk factors, and associations with postoperative outcomes.
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Stuart CM, Dyas AR, Bronsert MR, Abrams BA, Kelleher AD, Colborn KL, Randhawa SK, David EA, Mitchell JD, and Meguid RA
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- Humans, Male, Female, Retrospective Studies, Risk Factors, Incidence, Middle Aged, Aged, Postoperative Complications epidemiology, Postoperative Complications etiology, Treatment Outcome, Risk Assessment, Time Factors, Robotic Surgical Procedures adverse effects, Hypothermia epidemiology, Hypothermia etiology, Pneumonectomy adverse effects, Pneumonectomy methods
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Objective: Inadvertent perioperative hypothermia has been associated with poor surgical outcomes. The purpose of this study was to evaluate the incidence and associated postoperative complications of inadvertent perioperative hypothermia in patients undergoing robotic-assisted thoracic surgery lung resections., Methods: This was a single-center, retrospective cohort study evaluating all consecutive patients who underwent robotic-assisted thoracic surgery lung resection between January 1, 2021, and November 30, 2022. Temperatures were measured at 5 time points: preprocedure unit, anesthesia induction, 30 minutes postinduction, extubation, and recovery room arrival. Temperature changes were calculated at each interval. Adjusted and unadjusted comparison was performed between those who experienced varying levels of inadvertent perioperative hypothermia (Hypothermia I: <36 °C, Hypothermia II: <35.5 °C, and Hypothermia III: <35 °C) and those who did not., Results: A total of 313 patients were included, and 201 (64.2%) lobectomies, 50 (16.0%) segmentectomies, and 62 (19.8%) wedge resections were performed. Across all patients, 291 (93.0%) had a temperature less than 36 °C, 195 (62.3%) had a temperature less than 35.5 °C, and 100 (31.9%) had a temperature less than 35.0 °C. Patients experienced significant temperature change at all intervals (P < .001), with the greatest loss occurring during the preprocedure interval (between leaving preprocedure unit and anesthesia induction). On adjusted analysis, patients who experienced inadvertent perioperative hypothermia less than 35.5 °C were older (odds ratio, 1.03; 95% CI, 1.01-1.05), had lower body mass index (odds ratio, 0.95; 95% CI, 0.87-0.98), and had increasing operative time (odds ratio, 1.00; 95% CI, 1.00-1.01). Patients who experienced inadvertent perioperative hypothermia had higher risk-adjusted rates of overall morbidity and infectious postoperative complications., Conclusions: The majority of patients undergoing robotic-assisted thoracic surgery lung resections experience some degree of inadvertent perioperative hypothermia and have associated increased rates of 30-day morbidity. Structured and interval-specific interventions should be implemented to decrease rates of inadvertent perioperative hypothermia and subsequent complications., Competing Interests: Conflict of Interest Statement R.A.M. consults for Medtronic. J.D.M. consults for Intuitive. All other authors reported no conflicts of interest. The Journal policy requires editors and reviewers to disclose conflicts of interest and to decline handling or reviewing manuscripts for which they may have a conflict of interest. The editors and reviewers of this article have no conflicts of interest., (Copyright © 2023 The American Association for Thoracic Surgery. Published by Elsevier Inc. All rights reserved.)
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- 2024
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12. The association between patient preoperative disposition and outcomes after diagnostic lung biopsy.
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Dyas AR, Stuart CM, Fei Y, Cotton JL, Colborn KL, Weyant MJ, Randhawa SK, David EA, Mitchell JD, Scott CD, and Meguid RA
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Background: Surgical diagnostic lung biopsy (DLB) is performed to guide the management of pulmonary disease with unclear etiology. However, the utilization of surgical DLB in critically ill patients remains unclear. The purpose of this study was to determine if patient preoperative disposition impacts complication rates after DLB., Methods: This was retrospective cohort study using electronic health record (EHR) data at one academic institution [2013-2021]. Patients who underwent DLB were identified using current procedural terminology (CPT) codes and cohorted based on preoperative disposition. The primary outcome was 30-day mortality; secondary outcomes were overall morbidity, individual complications, and changes to medical therapy. Complication rates were compared using chi-squared tests, Fisher's exact tests, or analysis of variance (ANOVA). Multivariable logistic regression was performed to generate risk-adjusted odds ratios (ORs) for each complication., Results: Of 285 patients, 238 (83.5%) presented from home, 26 (9.1%) from inpatient floor units, and 21 (7.4%) from intensive care units (ICUs). Patients requiring ICU had the highest 30-day rates of mortality, overall morbidity, and all individual complications (all P<0.05). After risk adjustment, non-ICU inpatients had higher odds of postoperative ventilator use, prolonged ventilation, and ICU need than outpatients (all P<0.05). Preoperative ICU disposition was associated with increased OR of 30-day mortality [OR, 70.92; 95% confidence interval (CI): 5.55-906.32] and overall morbidity (OR, 7.27; 95% CI: 1.93-27.42) compared to patients with other preoperative dispositions. There were no differences in changes to medical therapy between the cohorts., Conclusions: Patients requiring ICU before DLB had significantly higher risk-adjusted rates of mortality and postoperative complications than outpatients and other inpatients. A clear benefit from tissue diagnosis should be defined prior to performing DLB on critically ill patients., Competing Interests: Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at https://jtd.amegroups.com/article/view/10.21037/jtd-23-1724/coif). The authors have no conflicts of interest to declare., (2024 Journal of Thoracic Disease. All rights reserved.)
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- 2024
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13. National trends in technique use for esophagectomy: Does primary surgeon specialty matter?
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Dyas AR, Mungo B, Bronsert MR, Stuart CM, Mungo AH, Mitchell JD, Randhawa SK, David E, Stewart CL, McCarter MD, and Meguid RA
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- Humans, Esophagectomy adverse effects, Esophagectomy methods, Anastomotic Leak surgery, Postoperative Complications epidemiology, Postoperative Complications etiology, Postoperative Complications surgery, Retrospective Studies, Minimally Invasive Surgical Procedures adverse effects, Minimally Invasive Surgical Procedures methods, Treatment Outcome, Specialties, Surgical, Surgeons, Esophageal Neoplasms surgery
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Background: Cardiothoracic surgeons and general surgeons (including surgical oncologists) perform most esophagectomies. The purpose of this study was to explore whether specialty-driven differences in surgical techniques and the use of minimally invasive surgical approaches exist and are associated with postoperative outcomes after esophagectomy., Methods: This was a retrospective review of the American College of Surgeons National Surgical Quality Improvement Program esophagectomy-targeted participant user file (2016-2018). Patients who underwent esophagectomy were sorted into cardiothoracic and general surgeon cohorts based on surgeon specialty. Perioperative characteristics and postoperative outcomes were compared using the χ
2 analysis or independent t test. Multivariable logistic regression controlling for perioperative variables was performed to generate risk-adjusted rates of postoperative outcomes compared by surgical specialty., Results: Of 3,247 patients included, 1,792 (55.2%) underwent esophagectomy by cardiothoracic surgeons and 1,455 (44.5%) by general surgeons as the primary surgeon. Cardiothoracic surgeons were more likely to use traditional minimally invasive surgical (P = .0004) or open approaches (P < .0001) and less likely to use robotic (P = .04) or a hybrid robotic and traditional approaches (P < .0001). Cardiothoracic surgeons performed more Ivor Lewis esophagectomies and fewer transhiatal and McKeown esophagectomies (P < .0001). After risk adjustment, there were no differences in rates of postesophagectomy complications, such as anastomotic leaks or positive margins, between cardiothoracic surgeons and general surgeons (all P > .05). However, cardiothoracic surgeons were more likely than general surgeons to treat anastomotic leaks with surgery rather than procedural interventions (odds ratio = 1.76; 95% confidence interval, 1.24-2.52)., Conclusion: Cardiothoracic surgeons and general surgeons use minimally invasive surgical subtypes differently when performing esophagectomy. However, there were no risk-adjusted differences in postoperative complications when compared by surgical subspecialty. Esophagectomy is being performed safely by surgeons with different specialties and training pathways., (Copyright © 2023 Elsevier Inc. All rights reserved.)- Published
- 2024
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14. The Effect of Social Vulnerability on Initial Stage and Treatment for Non-Small Cell Lung Cancer.
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Stuart CM, Dyas AR, Bronsert MR, Velopulos CG, Randhawa SK, David EA, Mitchell JD, and Meguid RA
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- Humans, Male, Female, Social Vulnerability, Databases, Factual, Carcinoma, Non-Small-Cell Lung epidemiology, Carcinoma, Non-Small-Cell Lung therapy, Lung Neoplasms epidemiology, Lung Neoplasms therapy
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Objective: The Social Vulnerability Index (SVI) is a composite metric for social determinants of health. The objective of this study was to determine if SVI influences stage at presentation for non-small cell lung cancer (NSCLC) patients and subsequent therapies., Materials and Methods: NSCLC patients from our local contribution to the National Cancer Database (2011-2021) were grouped into low SVI (<75 %ile) and high SVI (>75 %ile) cohorts. Demographics, cancer-related variables, and treatment modalities were compared. Multivariable logistic regression was performed to control for the impact of demographics on cancer presentation and for the impact of oncologic variables on treatment outcomes., Results: Of 1,662 NSCLC patients, 435 (26 %) were defined as high SVI. Compared to the 1,227 (74 %) low SVI patients, highly vulnerable patients were more likely to be male (53.3 % vs 46.0 %, p = 0.009), non-White (17.2 % vs 9.7 %, p < 0.0001), have comorbidities (29.4 % vs 23.1 %, p = 0.009) and present at a higher AJCC clinical T, M and overall stage (all p < 0.05). These findings persisted on multivariable analysis, with highly vulnerable patients having 1.5x the odds (95 %CI: 1.23-1.86, p < 0.001) of presenting at more advanced stage. Patients with high SVI were less likely to be recommended for and receive surgery (40.9 % vs 53.2 %, p < 0.001), and this finding persisted after controlling for stage at presentation (OR 1.37, 95 %CI 1.04-1.80)., Conclusions: Highly vulnerable patients present at a more advanced clinical stage and are less likely to be recommended and receive surgery, even after controlling for stage at presentation. Further investigation into these findings is warranted to achieve more equitable oncologic care., Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Christina M Stuart reports that this work was supported by the National Institutes of Health, under Ruth L. Kirschstein National Research Service Award T32CA17468., (Copyright © 2023 Elsevier B.V. All rights reserved.)
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- 2024
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15. Timing of recovery of quality of life after robotic anatomic lung resection.
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Dyas AR, Colborn KL, Stuart CM, McCabe KO, Barker AR, Sack K, Randhawa SK, Mitchell JD, and Meguid RA
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- Humans, Prospective Studies, Patient Reported Outcome Measures, Lung, Quality of Life, Robotic Surgical Procedures methods
- Abstract
Patient-reported outcomes (PROs) are an underreported aspect of surgical recovery. The purpose of our study was to track PROs after robotic anatomic lung to determine the timing to recovery of baseline patient baseline quality of life. This was a prospective cohort study at an academic medical center (4/2021-12/2022). Patients who underwent robotic anatomic lung resection were asked to complete PROMIS-29 surveys at the preoperative clinic visit, postoperative clinic visit, 30 days and 90 days postoperatively via in-person and email-based electronic surveys. The PROPr score, a summary of health-related quality of life, and mental and physical health z-scores were estimated for each patient using published methods and compared by postoperative timing. 75 patients completed the preoperative survey and at least one postoperative survey; 56 completed postoperative clinic surveys, 54 completed 30-day postoperative surveys, and 40 completed 90-day postoperative surveys. All three PROMIS scores decreased between the preoperative and first postoperative visit (all p < 0.05). PROPr scores increased over time but remained significantly worse than baseline by 90 days (-0.08 difference between 90 days and preoperative, p = 0.02). While PROMIS summary z-scores for physical health remained - 0.29 lower at 90 days postoperatively, this did not reach statistical significance (p = 0.06). Mental health scores returned to baseline by 90 days postoperatively (p = 0.41). While some PROs returned to baseline by 90 days postoperatively, overall quality-of-life scores remained significantly below preoperative baselines. These findings are important to share with patients during the informed consent process to achieve patient centered care more effectively., (© 2024. The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature.)
- Published
- 2024
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16. Quality Review Committee Audit Improves Thoracic Enhanced Recovery After Surgery Protocol Compliance.
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Dyas AR, Kelleher AD, Cumbler EU, Barker AR, McCabe KO, Bata KE, Abrams BA, Randhawa SK, Mitchell JD, and Meguid RA
- Subjects
- Humans, Postoperative Complications, Guideline Adherence, Advisory Committees, Pain, Postoperative, Length of Stay, Enhanced Recovery After Surgery
- Abstract
Introduction: Compliance with thoracic Enhanced Recovery After Surgery (ERAS) protocols is critical to achieving their maximum benefits. We sought to examine utilization of quality review meetings as a method to improve protocol compliance through identification and resolution of barriers with compliance., Methods: A multidisciplinary committee implemented a thoracic ERAS protocol for anatomic lung resections across five hospitals within our health system. Compliance data at one institution were tracked for 4 mo after initiation of the ERAS protocol; a quality review meeting was held at one hospital, and two additional months of compliance data were recorded. Outcomes of interest were compliance changes to five protocol elements. Pathway elements deferred due to "mindful deviation" were excluded. Chi-square and Fisher's exact tests were used to compare compliance differences., Results: We included 81 patients: 53 patients before the quality review meeting and 28 after. There were 405 compliance opportunities; 68 (17%) were excluded for mindful deviation, leaving 337 (83%) for inclusion. Overall compliance improved from 53% before to 84% after the quality review meeting. Compliance to avoiding intraoperative urinary catheters, placing chest tubes to water seal in postanesthesia care unit, liberal chest tube removal, and postoperative multimodal pain regimen use improved after the quality review meeting (P values <0.05). Use of preoperative pain bundles was not significantly different (87% versus 96%, P = 0.25)., Conclusions: Conducting a quality review meeting significantly improved ERAS protocol element use at our intervention healthcare region. This methodology should be considered at other institutions implementing surgical protocols., (Copyright © 2023 Elsevier Inc. All rights reserved.)
- Published
- 2024
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17. Social vulnerability is associated with post-operative morbidity following robotic-assisted lung resection.
- Author
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Stuart CM, Dyas AR, Byers S, Velopulos CG, Randhawa SK, David EA, Mitchell JD, and Meguid RA
- Abstract
Background: The social vulnerability index (SVI) is a neighborhood-based metric used to determine an individual's susceptibility to socioeconomic hardship, with high SVI indicating high susceptibility. SVI has previously been associated with surgical outcomes. We aimed to determine if SVI influences morbidity following robotic-assisted lung resection., Methods: This was a retrospective cohort study at one academic medical center (1/1/2021-11/30/2022). Patients undergoing robotic-assisted lung resection were grouped into low (<75
th percentile) and high (≥75th percentile) SVI cohorts. The primary outcome was 30-day overall morbidity; secondary outcomes were individual 30-day post-operative outcomes. Univariate analysis was performed using Chi-squared or Mann-Whitney- U tests, and multivariable logistic regression was performed to generate risk-adjusted odds ratios (ORs) of postoperative complications., Results: We included 320 patients, of which 40 patients (12.5%) in the high-SVI group and 280 (87.5%) in the low-SVI group. High SVI patients were more likely to be non-Caucasian and of Hispanic ethnicity, but there were no other differences in perioperative characteristics (all P>0.05). High SVI patients were more likely to experience a post-operative complication (42.5% vs. 24.6%, P=0.017), surgical site infection (SSI) (12.5% vs. 4.3%, P=0.047), hemothorax (5.0% vs. 0.0%, P=0.015), intensive care need (15.0% vs. 4.6%, P=0.021), sepsis (10.0% vs. 1.1%, P=0.006) and unplanned reoperation (5.0% vs. 0.4%, P=0.042). After risk-adjustment, the association of increased overall morbidity with high SVI persisted (OR =2.53; 95% confidence interval: 1.19-5.35)., Conclusions: High SVI was associated with increased risk-adjusted odds of morbidity after robotic-assisted lung resection. Highly vulnerable patients should be allocated perioperative resources to help mitigate the increased risk of these complications., Competing Interests: Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at https://jtd.amegroups.com/article/view/10.21037/jtd-23-1122/coif). C.M.S. reports that she receives associated grant funding from the National Institutes of Health, under Ruth L. Kirschstein National Research Service Award T32CA17468. J.D.M. reports that he performs consulting for Intuitive Surgical, Inc. R.A.M. reports that he consults for Medtronic, Inc. The other authors have no conflicts of interest to declare., (2023 Journal of Thoracic Disease. All rights reserved.)- Published
- 2023
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18. Lung recovery utilizing thoracoabdominal normothermic regional perfusion during donation after circulatory death: The Colorado experience.
- Author
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Cain MT, Park SY, Schäfer M, Hay-Arthur E, Justison GA, Zhan QP, Campbell D, Mitchell JD, Randhawa SK, Meguid RA, David EA, Reece TB, Cleveland JC Jr, and Hoffman JRH
- Abstract
Objective: Donation after circulatory death (DCD) procurement and transplantation after thoracoabdominal normothermic regional perfusion (TA-NRP) remains a novel technique to improve cardiac and hepatic allograft preservation but may be complicated by lung allograft pulmonary edema. We present a single-center series on early implementation of a lung-protective protocol with strategies to mitigate posttransplant pulmonary edema in DCD lung allografts after TA-NRP procurement., Methods: Data from all lung transplantations performed using a TA-NRP procurement strategy from October 2022 to April 2023 are presented. Donor management consisted of key factors to reduce lung allograft pulmonary edema: aggressive predonation and early posttransplant diuresis, complete venous drainage at TA-NRP initiation, and early pulmonary artery venting upon initiation of systemic perfusion. Donor and recipient characteristics, procurement characteristics such as TA-NRP intervals, and 30-day postoperative outcomes were assessed., Results: During the study period, 8 lung transplants were performed utilizing TA-NRP procurement from DCD donors. Donor ages ranged from 16 to 39 years and extubation time to declaration of death ranged from 10 to 90 minutes. Time from declaration to TA-NRP initiation was 7 to 17 minutes with TA-NRP perfusion times of 49 to 111 minutes. Median left and right allograft warm ischemia times were 55.5 minutes (interquartile range, 46.5-67.5 minutes) and 41.0 minutes (interquartile range, 39.0-53.0 minutes, respectively, with 2 recipients supported with cardiopulmonary bypass or venoarterial extracorporeal membrane oxygenation during implantation. No postoperative extracorporeal membrane oxygenation was required. There were no pulmonary-related deaths; however, 1 patient died from complications of severe necrotizing pancreatitis with a normal functioning allograft. All patients were extubated within 24 hours. Index intensive care unit length of stay ranged from 3 to 11 days with a hospital length of stay of 13 to 37 days., Conclusions: Despite concern regarding quality of DCD lung allografts recovered using the TA-NRP technique, we report initial success using this procurement method. Implementation of strategies to mitigate pulmonary edema can result in acceptable outcomes following lung transplantation. Demonstration of short- and long-term safety and efficacy of this technique will become increasingly important as the use of TA-NRP for thoracic and abdominal allografts in DCD donors expands., Competing Interests: The authors reported no conflicts of interest. The Journal policy requires editors and reviewers to disclose conflicts of interest and to decline handing manuscripts for which they may have a conflict of interest. The editors and reviewers of this article have no conflicts of interest., (© 2023 The Author(s).)
- Published
- 2023
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19. ASO Author Reflections: Gastric Ischemic Preconditioning Prior to Esophagectomy: Laparoscopic Gastric Ischemic Preconditioning.
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Stuart CM, Gergen AK, Byers S, Vigneshwar N, Madsen H, Johnson J, Oase K, Garduno N, Marsh M, Pratap A, Mitchell JD, David EA, Randhawa SK, Meguid RA, McCarter MD, and Stewart CL
- Subjects
- Humans, Esophagectomy, Stomach surgery, Ischemic Preconditioning, Laparoscopy, Esophageal Neoplasms surgery
- Published
- 2023
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- View/download PDF
20. Esophagram should be performed to diagnose esophageal perforation before inter-hospital transfer.
- Author
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Madsen HJ, Stuart CM, Wojcik BM, Dyas AR, Hunt A, Helmkamp LJ, Gergen AK, Weyant MJ, Randhawa SK, Mitchell JD, and Meguid RA
- Abstract
Background: Early recognition of esophageal perforation may prevent morbidity and mortality, and accurate diagnostic imaging facilitates triage. Stable patients with suspected perforation may be transferred to higher levels of care before appropriate work-up and diagnosis confirmation. We reviewed patients transferred for esophageal perforation to critically analyze the diagnostic workflow., Methods: We performed a retrospective review of patients transferred to our tertiary care institution from 2015-2021 for suspected esophageal perforation. Demographics, referring site characteristics, diagnostic studies, and management were analyzed. Bivariate comparisons were performed using Wilcoxon-Mann-Whitney tests for continuous variables and chi-squared or Fisher's exact tests for categorical variables., Results: Sixty-five patients were included. Etiology of suspected perforation was spontaneous in 53.8% and iatrogenic in 33.8%. Most patients were transferred within 24 hours from time of suspected perforation (66.2%). Transferring sites included seven states and were 101-300 miles (32.3%) or >300 miles (26.2%) away. CT imaging was obtained in 96.9% before transfer, most commonly demonstrating pneumomediastinum (46.2%). Only 21.5% of patients had an esophagram before transfer. Following transfer, 36.9% (n=24) were ultimately not found to have esophageal perforation, demonstrated by negative arrival esophagram in 79.1%. In patients with confirmed perforation (n=41), 58.5% had surgery, 26.8% endoscopic intervention, and 14.6% supportive care., Conclusions: After transfer a proportion of patients were ultimately found to not have esophageal perforation, typically demonstrated by negative esophagram upon arrival. We conclude that a recommendation of performing esophagram at the presenting site, when possible, may prevent unnecessary transfers, and will likely reduce costs, conserve resources, and decrease management delays., Competing Interests: Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at https://jtd.amegroups.com/article/view/10.21037/jtd-22-1798/coif). The authors have no conflicts of interest to declare., (2023 Journal of Thoracic Disease. All rights reserved.)
- Published
- 2023
- Full Text
- View/download PDF
21. Lung cancer survivors' views on telerehabilitation following curative intent therapy: a formative qualitative study.
- Author
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Ha DM, Nunnery MA, Klocko RP, Haverhals LM, Bekelman DB, New ML, Randhawa SK, Stevens-Lapsley JE, Studts JL, Prochazka AV, and Keith RL
- Subjects
- Humans, Lung, Telerehabilitation methods, Cancer Survivors, Telemedicine, Lung Neoplasms therapy
- Abstract
Objectives: To inform personalised home-based rehabilitation interventions, we sought to gain in-depth understanding of lung cancer survivors' (1) attitudes and perceived self-efficacy towards telemedicine; (2) knowledge of the benefits of rehabilitation and exercise training; (3) perceived facilitators and preferences for telerehabilitation; and (4) health goals following curative intent therapy., Design: We conducted semi-structured interviews guided by Bandura's Social Cognitive Theory and used directed content analysis to identify salient themes., Setting: One USA Veterans Affairs Medical Center., Participants: We enrolled 20 stage I-IIIA lung cancer survivors who completed curative intent therapy in the prior 1-6 months. Eighty-five percent of participants had prior experience with telemedicine, but none with telerehabilitation or rehabilitation for lung cancer., Results: Participants viewed telemedicine as convenient, however impersonal and technologically challenging, with most reporting low self-efficacy in their ability to use technology. Most reported little to no knowledge of the potential benefits of specific exercise training regimens, including those directed towards reducing dyspnoea, fatigue or falls. If they were to design their own telerehabilitation programme, participants had a predominant preference for live and one-on-one interaction with a therapist, to enhance therapeutic relationship and ensure correct learning of the training techniques. Most participants had trouble stating their explicit health goals, with many having questions or concerns about their lung cancer status. Some wanted better control of symptoms and functional challenges or engage in healthful behaviours., Conclusions: Features of telerehabilitation interventions for lung cancer survivors following curative intent therapy may need to include strategies to improve self-efficacy and skills with telemedicine. Education to improve knowledge of the benefits of rehabilitation and exercise training, with alignment to patient-formulated goals, may increase uptake. Exercise training with live and one-on-one therapist interaction may enhance learning, adherence, and completion. Future work should determine how to incorporate these features into telerehabilitation., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)
- Published
- 2023
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22. Development of a universal thoracic enhanced recover after surgery protocol for implementation across a diverse multi-hospital health system.
- Author
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Dyas AR, Kelleher AD, Erickson CJ, Voss JA, Cumbler EU, Lambert-Kerzner A, Vizena AS, Robinson-Chavez C, Kee BL, Barker AR, Fuller MS, Miller SA, McCabe KO, Cook KM, Randhawa SK, Mitchell JD, and Meguid RA
- Abstract
Background: Implementation of enhanced recovery after surgery (ERAS) pathways for patients undergoing anatomic lung resection have been reported at individual institutions. We hypothesized that an ERAS pathway can be successfully implemented across a large healthcare system including different types of hospital settings (academic, academic-affiliated, community)., Methods: An expert panel with representation from each hospital within a healthcare system was convened to establish a thoracic ERAS pathway for patients undergoing anatomic lung resection and to develop tools and analytics to ensure consistent application. The protocol was translated into an order set and pathway within the electronic health record (EHR). Iterative implementation was performed with recording of the processes involved. Barriers and facilitators to implementation were recorded., Results: Development and implementation of the protocol took 13 months from conception to rollout. Considerable change management was needed for consensus and incorporation into practice. Facilitators of change included peer accountability, incorporating ERAS care elements into the EHR, and conducting case reviews with timely feedback on protocol deviations. Barriers included institutional cultural differences, agreement in defining mindful deviation from the ERAS protocol, lack of access to specific coded data, and resource scarcity caused by the COVID-19 pandemic. Support from the hospital system's executive leadership and institutional commitment to quality improvement helped overcome barriers and maintain momentum., Conclusions: Development and implementation of a health-system wide thoracic ERAS protocol for anatomic lung resections across a six-hospital health system requires a multidisciplinary team approach. Barriers can be overcome though multidisciplinary team engagement and executive leadership support., Competing Interests: Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at https://jtd.amegroups.com/article/view/10.21037/jtd-22-518/coif). The authors have no conflicts of interest to declare., (2022 Journal of Thoracic Disease. All rights reserved.)
- Published
- 2022
- Full Text
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23. One-Year Survival Worse for Lung Retransplants Relative to Primary Lung Transplants.
- Author
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Randhawa SK, Yang Z, Morkan DB, Yan Y, Chang SH, Hachem RR, Witt CA, Byers DE, Kulkarni HS, Guillamet RV, Kozower BD, Nava RG, Meyers BF, Patterson GA, Kreisel D, and Puri V
- Subjects
- Humans, Lung, Proportional Hazards Models, Retrospective Studies, Survival Rate, Treatment Outcome, Lung Transplantation
- Abstract
Background: Outcomes after lung retransplantation (LRT) remain inferior compared with primary lung transplantation (PLT). This study examined the impact of center volume on 1-year survival after LRT., Methods: Using the United Network for Organ Sharing database, the study abstracted patients undergoing PLT and LRT between January 2006 and December 2017, excluding combined heart-lung transplants and multiple retransplants. One-year survival rates after PLT and LRT were compared using propensity score matching. In the LRT cohort, multivariable Cox models with and without time-dependent coefficients were fitted to examine association between transplant center volume and 1-year survival. Center volume was categorized on the basis of inspection of restricted cubic splines., Results: A total of 20,675 recipients (PLT 19,853 [96.0%] vs LRT 822 [4.0%]) were included. One-year survival was lower for LRT recipients in the matched cohort (PLT 84.8% vs LRT 76.7%). There was steady improvement in 1-year survival after LRT (2006 to 2009 72.1% vs 2010 to 2013 76.6% vs 2014 to 2017 80.1%). Higher center volume was associated with better 1-year survival after LRT. This survival difference was noted in the initial 30 days after transplantation (intermediate vs low volume hazard ratio, 0.282 [95% confidence interval, 0.151 to 0.526]; high vs low volume hazard ratio, 0.406 [95% confidence interval, 0.224 to 0.737]), but it became insignificant after 30 days., Conclusions: Superior 1-year survival after LRT at higher-volume centers is predominantly the result of better 30-day outcomes. This finding suggests that LRT candidates may be referred to higher-volume centers for surgery., (Copyright © 2022 The Society of Thoracic Surgeons. Published by Elsevier Inc. All rights reserved.)
- Published
- 2022
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24. Disparities in Lung Transplantation.
- Author
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Randhawa SK, Roberts SH, and Puri V
- Subjects
- Humans, Lung, Retrospective Studies, Lung Transplantation, Quality of Life
- Abstract
Since the initial report of long-term survival after lung transplantation (LT) in 1983, there has been remarkable progress in the field and LT is now the gold-standard therapy for patients with end-stage lung disease. It confers a significant survival advantage and improves the quality of life in patients who often have few other treatment options. However, LT remains a complex undertaking and establishing and maintaining an LT program is resource intensive with multiple potential barriers. In this article, we focus on disparities in LT and the potential solutions to improving access to LT., Competing Interests: Disclosure The authors have nothing to disclose., (Copyright © 2021 Elsevier Inc. All rights reserved.)
- Published
- 2022
- Full Text
- View/download PDF
25. Single-stage tracheal transplantation-From bench to bedside.
- Author
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Randhawa SK and Patterson GA
- Subjects
- Humans, Trachea surgery, Tissue and Organ Procurement, Vascularized Composite Allotransplantation
- Published
- 2021
- Full Text
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26. Commentary: The changing risk paradigm in lung cancer: Are we opening Pandora's box?
- Author
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Randhawa SK and Puri V
- Subjects
- Asian People, Diagnostic Tests, Routine, Humans, Lung Neoplasms, Tomography, X-Ray Computed
- Published
- 2020
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27. Influence of Long Term Application of Butachlor on its Dissipation and Harvest Residues in Soil and Rice.
- Author
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Kaur P, Randhawa SK, Duhan A, and Bhullar MS
- Subjects
- Chromatography, High Pressure Liquid, Half-Life, Herbicides analysis, Kinetics, Oryza chemistry, Soil chemistry, Tandem Mass Spectrometry, Acetanilides analysis, Environmental Monitoring, Pesticide Residues analysis, Soil Pollutants analysis
- Abstract
The study delineates the effect of repeated application of butachlor to rice crop from 1997 onwards. Additionally, in 2014 and 2015, dissipation kinetics of butachlor in soil was studied under field and laboratory conditions. The average recovery of butachlor for soil, rice grain and rice straw ranged between 80.3%-93.2% and 82.8%-96.5% with quantification limit of 0.01 and 0.003 µg g
-1 for HPLC and GC-MS/MS, respectively. The dissipation of butachlor followed first order kinetics and half-life under long term field trials in rice soil varied from 15.2 to 19.29 days and 25.94 to 29.79 days under field and laboratory conditions, respectively. The residue of butachlor in soil, rice grain and straw samples at harvest over the years was below the quantification limit and no quantifiable amount of metabolites were present in soil at harvest suggestive of its safe application.- Published
- 2017
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28. Therapy: atenolol versus metoprolol tartrate--conflicting outcomes data.
- Author
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Randhawa SK and Elliott WJ
- Subjects
- Female, Humans, Male, Adrenergic beta-1 Receptor Antagonists administration & dosage, Atenolol administration & dosage, Kidney physiology, Metoprolol administration & dosage, Population Surveillance methods, Renal Insufficiency, Chronic drug therapy
- Published
- 2014
- Full Text
- View/download PDF
29. Mutagenicity of systemic organophosphate pesticides metasystox and rogor.
- Author
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Ladhar SS, Grover IS, and Randhawa SK
- Subjects
- Animals, Mutagenicity Tests, Rats, Salmonella typhimurium drug effects, Dimethoate toxicity, Mutation, Organothiophosphorus Compounds toxicity, Pesticides toxicity
- Abstract
Mutagenicity of metasystox and rogor could not be detected on the basis of tests employing Ames Salmonella/microsome assay even in the presence of wheat seedling or rat liver microsomal activation systems.
- Published
- 1990
30. Carbaryl-A selective genotoxicant.
- Author
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Grover IS, Ladhar SS, and Randhawa SK
- Abstract
Mutagenic effects of carbaryl, a contact insecticide with slight systemic properties, have been investigated employing histidine reversion assay in Salmonella typhimurium strains and in vivo chromosomal aberrations in root meristems of Allium cepa. A detailed investigation revealed that carbaryl did not enhance significantly the frequency of histidine revertants in any of the strains of Salmonella i.e. frameshift mutagen tester (TA98), base pair substitution tester strain (TA1535) and ochre mutant strain (TA102). The supplementation with S9 mix did not have any appreciable effect. S14 prepared from wheat seedlings also did not enhance the reversion frequency significantly. However, carbaryl induced both clastogenic and physiological types of chromosomal aberration. The spectrum of chromosomal aberrations included c-mitosis, stickiness, vagrant chromosomes, polyploidy multi-polarity, delayed anaphases, end to end joining of chromosomes, chromosome breaks, ring chromosomes and anaphase bridges. The frequency of chromosomal aberrations was reduced by transferring the carbaryl treated bulbs to distilled water for 24 and 48 h. Similarly, recovery in the mitotic index was noticed by such transfer. The differences between the two assays may be attributed to differences in the metabolism of the test organisms.
- Published
- 1989
- Full Text
- View/download PDF
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