22 results on '"Iwuchukwu C"'
Search Results
2. Abstract No. 457 Initial experience of treating hepatocellular carcinoma with concomitant nivolumab and liver-directed therapies
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Magny, S., primary, Iwuchukwu, C., additional, Synder, C., additional, and Chao, C., additional
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- 2021
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3. Abstract No. 459 Malfunctioning tunneled dialysis catheters: analysis of factors associated with catheters requiring exchange
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Magny, S., primary, Iwuchukwu, C., additional, Synder, C., additional, and Chao, C., additional
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- 2021
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4. Abstract No. 7 Experience with radioembolization for hepatocellular carcinoma complicated by portal vein tumor thrombus
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Magny, S., primary, Iwuchukwu, C., additional, Synder, C., additional, and Chao, C., additional
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- 2021
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5. Abstract No. 458 Initial review of the Mynx control vascular closure device: comparison with the Vascade vascular closure device
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Magny, S., primary, Iwuchukwu, C., additional, Synder, C., additional, and Chao, C., additional
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- 2021
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6. Abstract No. 440 Effectiveness of epinephrine containing lidocaine in decreasing bleeding complications after tunnel dialysis catheter placement
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Iwuchukwu, C., primary, von Plato, M., additional, Suzuki-Han, A., additional, and Park, S., additional
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- 2020
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7. Fungal and Mycotoxin Contamination of Stored Maize in Kogi, Northcentral Nigeria: An Implication for Public Health
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Akoma, O. N., primary, Ezeh, C. C., primary, Chukwudozie, K. I., primary, Iwuchukwu, C. C., primary, and Apeh, D. O., primary
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- 2019
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8. Perceptions and barriers of telehealth services among trauma and acute care surgery patients
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Grenn E. Emily, Dickson Anna, Mason Jack, Robert O'Brien, Matthew Kutcher, Matthew Morris, and Iwuchukwu Chinenye
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Telemedicine ,Telehealth ,Trauma ,Acute care surgery ,Perceptions of telehealth ,Surgical quality ,Surgery ,RD1-811 - Abstract
Background: Patients admitted to tertiary centers are often transferred from long distances and thus follow-up care presents a significant challenge for these patients. The use of telehealth in outpatient visits has been shown to decrease travel costs and increase patient satisfaction, but many studies were performed in urban settings and did not address usability limitations for patients in rural settings. The purpose of the study was to understand the patient-perceived feasibility of utilizing telehealth in a large rural referral trauma center and assess patient's perceptions of telehealth. Prior studies on utilization of telehealth have been done at mostly urban locations and a true understanding of internet availability and accessibility for patients living in rural areas will enable successful implementation and utilization of telehealth in this population. Methods: We administered a brief questionnaire to patients >16 years old admitted to a single Level 1 academic trauma center's Trauma and Acute Care Surgery services prior to discharge or at the first clinic visit from June 2021 to December 2021. All patients who were eligible and able to complete the questionnaire were approached for voluntary participation in the study. Consent was obtained by the research staff and the questionnaire was completed independently by the participants. Results: 77 participants completed the questionnaire, 45 (58%) were male, 30 (39%) were female and 2 (3%) were missing and the mean age was 42 years (S.D =17.6). 46 (61%) were Black, 23 (32%) were White and 5 (7%) did not report a race. Regarding insurance status, 30 (40%) had commercial insurance, 8 (11%) had Medicare, 19 (25%) had Medicaid and 18 (24%) were uninsured. 87% of patients reported access to internet at home, and 87% use a smartphone as their primary device for internet access. 86% felt comfortable using telehealth at home. More than half of the respondents (59%) agreed or strongly agreed to use telehealth for their next health care provider visit. 16 (21%) of the respondents strongly agree that telehealth will improve the care they receive from their healthcare professional (HCP), 11(15%) of the respondents strongly disagree telehealth would decrease the care they receive from their HCP, and 14 (19%) of the respondents strongly agree that telehealth would provide faster access to an HCP. 9 (12%) of the respondents strongly agree that they would receive the same quality of care with telehealth compared to an office visit while 17 (23%) disagree. Blacks were more likely to report negative perceptions of telehealth compared to Whites patients. Conclusion: Majority of our patients were willing to utilize telehealth for their next health care provider visit and had access to internet. Telehealth is very feasible in rural locations inlight of a concern for internet availability and accessibility and offers attractive options for patients. However, there are still some disparities in perceptions such as the quality of care received being equivocal to an office visit that might be a significant barrier to utilization. Such perceptions may be improved with increased familiarization and education on telehealth services.
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- 2022
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9. 1010 Plaque burden as a determinant of coronary endothelial function
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Roth Marguerite, Iwuchukwu Chizor, Siddiqi Saadi, Han Jing, Borges Andressa, Jain Hitender, Reichek Nathaniel, and Cao Jane
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Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Published
- 2008
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10. Letters to the editor.
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Iwuchukwu C
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- 2010
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11. Short-Term and Long-Term Fluvastatin Inhibit Effects of Thrombospondin-1 on Human Vascular Smooth Muscle Cells.
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Maier K, Helkin A, Stein JJ, Yuan HL, Seymour K, Ryabtsev B, Iwuchukwu C, and Gahtan V
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- Humans, Time Factors, Cells, Cultured, src-Family Kinases metabolism, Proto-Oncogene Proteins c-fos metabolism, Proto-Oncogene Proteins c-fos genetics, Enzyme Activation, Phosphatidylinositol 3-Kinases metabolism, Phosphorylation, Focal Adhesion Kinase 1 metabolism, Extracellular Signal-Regulated MAP Kinases metabolism, Fluvastatin pharmacology, Thrombospondin 1 metabolism, Thrombospondin 1 genetics, Fatty Acids, Monounsaturated pharmacology, Mevalonic Acid pharmacology, Mevalonic Acid metabolism, Muscle, Smooth, Vascular drug effects, Muscle, Smooth, Vascular metabolism, Muscle, Smooth, Vascular pathology, Hydroxymethylglutaryl-CoA Reductase Inhibitors pharmacology, Myocytes, Smooth Muscle drug effects, Myocytes, Smooth Muscle metabolism, Myocytes, Smooth Muscle pathology, Cell Movement drug effects, Signal Transduction drug effects, Indoles pharmacology
- Abstract
Introduction: Vascular smooth muscle cells are important in intimal hyperplasia. Thrombospondin-1 is a matricellular protein involved in the vascular injury response. Statins are cholesterol lowering drugs that have beneficial cardiovascular effects. Statis have been shown to inhibit smooth muscle migration through the mevalonate pathway. This effect is thought to be mediated by small G protein Ras and Rho turnover which requires many hours. While many patients undergoing treatment for vascular disease are on statins, many are not. Thus immediate pretreatment with statins before surgery may be beneficial. We hypothesized that statins have effects independent of the mevalonate pathway and thus have an immediate effect., Methods: Human vascular smooth muscle cells were pretreated for 20 h (long-term) or 20 min (short-term) with fluvastatin, or mevalonolactone plus fluvastatin. Thrombospondin-1-induced migration, activation of p42/p44 extracellular signal-regulated kinase, c-Src, focal adhesion kinase and PI3 kinase was determined. The effect of fluvastatin on thrombospondin-1-induced expression of THBS1 , FOS , HAS2 and TGFB2 was examined., Results: Both treatments inhibited thrombospondin-1-induced chemotaxis back to the control group. Mevalonolactone reversed the long-term statin effect by increasing migration but had no effect on the short-term statin response. p42/p44 extracellular signal-regulated kinase was activated by thrombospondin-1 and both treatments augmented activation. Neither treatment affected c-Src activity, but both inhibited focal adhesion kinase and PI3 kinase activity. Only long-term statin treatment inhibited THBS1 expression while both treatments inhibited FOS and TGFB2 expression. Neither treatment affected HAS2 . FOS knockdown inhibited thrombospondin-1-induced HAS2 but not TGFβ2 gene expression., Conclusion: Long-term fluvastatin inhibited thrombospondin-1-induced chemotaxis through the mevalonate pathway while short-term fluvastatin inhibited chemotaxis through an alternate mechanism. Short-term stains have immediate effects independent of the mevalonate pathway. Acute local treatment with statins followed by longer term therapy may limit the vascular response to injury., Competing Interests: Declaration of Conflicting InterestsThe author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
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- 2025
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12. Implementing Shared Decision-Making for Multiple Sclerosis: The MS-SUPPORT Tool.
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Col NF, Solomon AJ, Alvarez E, Pbert L, Ionete C, BerriosMorales I, Chester J, Kutz C, Iwuchukwu C, Livingston T, Springmann V, Col HV, and Ngo LH
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- Adult, Humans, Female, Male, Decision Making, Shared, Quality of Life, Multiple Sclerosis drug therapy, Physicians
- Abstract
Background: Disease modifying therapies (DMTs) offer opportunities to improve the course of multiple sclerosis (MS), but decisions about treatment are difficult. People with multiple sclerosis (pwMS) want more involvement in decisions about DMTs, but new approaches are needed to support shared decision-making (SDM) because of the number of treatment options and the range of outcomes affected by treatment. We designed a patient-centered tool, MS-SUPPORT, to facilitate SDM for pwMS. We sought to evaluate the feasibility and impact of MS-SUPPORT on decisions about disease modifying treatments (DMTs), SDM processes, and quality-of-life., Methods: This multisite randomized controlled trial compared the SDM intervention (MS-SUPPORT) to control (usual care) over a 12-month period. English-speaking adults with relapsing MS were eligible if they had an upcoming MS appointment and an email address. To evaluate clinician perspectives, participants' MS clinicians were invited to participate. Patients were referred between November 11, 2019 and October 23, 2020 by their MS clinician or a patient advocacy organization (the Multiple Sclerosis Association of America). MS-SUPPORT is an online, interactive, evidence-based decision aid that was co-created with pwMS. It clarifies patient treatment goals and values and provides tailored information about MS, DMTs, and adherence. Viewed by patients before their clinic appointment, MS-SUPPORT generates a personalized summary of the patient's treatment goals and preferences, adherence, DMT use, and clinical situation to share with their MS clinician. Outcomes (DMT utilization, adherence, quality-of-life, and SDM) were assessed at enrollment, post-MS-SUPPORT, post-appointment, and quarterly for 1 year., Results: Participants included 501 adults with MS from across the USA (84.6% female, 83% white) and 34 of their MS clinicians (47% neurologists, 41% Nurse Practitioners, 12% Physician Assistants). Among the 203 patients who completed MS-SUPPORT, most (88.2%) reported they would recommend it to others and that it helped them talk to their doctor (85.2%), understand their options (82.3%) and the importance of taking DMTs as prescribed (82.3%). Among non-users of DMTs at baseline, the probability ratio of current DMT use consistently trended higher over one-year follow-up in the MS-SUPPORT group (1.30 [0.86-1.96]), as did the cumulative probability of starting a DMT within 6-months, with shorter time-to-start (46 vs 90 days, p=0.24). Among the 222 responses from 34 participating clinicians, more clinicians in the MS-SUPPORT group (vs control) trended towards recommending their patient start a DMT (9 of 108 (8%) vs 5 of 109 (5%), respectively, p=0.26). Adherence (no missed doses) to daily-dosed DMTs was higher in the MS-SUPPORT group (81.25% vs 56.41%, p=.026). Fewer patients forgot their doses (p=.046). The MS-SUPPORT group (vs control) reported 1.7 fewer days/month of poor mental health (p=0.02)., Conclusions: MS-SUPPORT was strongly endorsed by patients and is feasible to use in clinical settings. MS-SUPPORT increased the short-term probability of taking and adhering to a DMT, and improved long-term mental health. Study limitations include selection bias, response bias, social desirability bias, and recall bias. Exploring approaches to reinforcement and monitoring its implementation in real-world settings should provide further insights into the value and utility of this new SDM tool., Competing Interests: Declaration of Competing Interest Funding for this research was provided by EMD Serono Inc., USA, an affiliate of Merck KGaA, Darmstadt, Germany, through MS-LINK, a scientific consortium with a mission to improve patient outcomes by advancing MS science to generate actionable real-world data and patient-centered solutions. Further research supported by MS-LINK is designed to close existing scientific gaps identified by the MS community to advance discovery, care, and outcomes for patients with MS. NC: reports research grants and payment for participation in Advisory Board from EMD Serono, Inc., an affiliate of Merck KGaA, Darmstadt, Germany, during the conduct of the study; grants from Pfizer, grants from Biogen, grants from Edwards Lifesciences, LLC, and grants from MSAA (Multiple Sclerosis Association of America). EA: reports consultation or advisory fees for Alexion, Biogen, Celgene/BMS, EMD Serono/Merck, Genentech/Roche, Horizon, Motric Bio, Novartis, Sanofi, and TG Therapeutics; and funding or grants from: Biogen, Genentech/Roche, Novartis, TG Therapeutics, Patient-Centered Outcomes Research Institute, National Multiple Sclerosis Society, National Institutes of Health, and Rocky Mountain MS Center, LP: has nothing to disclose. CI: (Carolina) has received research support from Riccio Neuroscience Fund and compensation from Sanofi Genzyme and Bristol Myers Squibb for advisory board participation. IBM: has nothing to disclose. AJS: reports funding by NIH/NINDS K02NS109340; compensation for consulting or advisory boards from EMD Serono, Genentech, Biogen, Alexion, Celgene, Octave Bioscience, and Greenwich Biosciences, compensation for nonpromotional speaking from EMD Serono, and research support from Biogen; and participated in contracted research with Biogen, Novartis, Actelion, and Genentech. CK: Consultant for EMD Serono, Biogen, Genzyme, BMS, Amgen, Teva, and Alexion. TL: is an employee of EMD Serono, Inc., Rockland, MA, USA, an affiliate of Merck KGaA, Darmstadt, Germany, JC: reports personal fees from EMD Serono, Inc., an affiliate of Merck KGaA, Darmstadt, Germany, Biogen, Allergan, and Biohaven, CIw (Crystal): has nothing to disclose. HC: has nothing to disclose. LN: has nothing to disclose., (Copyright © 2023 The Author(s). Published by Elsevier B.V. All rights reserved.)
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- 2023
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13. Racial, Gender, and Neighborhood-Level Disparities in Pediatric Trauma Care.
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Dickens H, Rao U, Sarver D, Bruehl S, Kinney K, Karlson C, Grenn E, Kutcher M, Iwuchukwu C, Kyle A, Goodin B, Myers H, Nag S, Hillegass WB, and Morris MC
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- Male, Adult, Female, Humans, Child, United States, Retrospective Studies, Analgesics, Opioid, Patient Discharge, Healthcare Disparities, Aftercare, Emergency Medical Services
- Abstract
Background: Disparities in trauma outcomes and care are well established for adults, but the extent to which similar disparities are observed in pediatric trauma patients requires further investigation. The objective of this study was to evaluate the unique contributions of social determinants (race, gender, insurance status, community distress, rurality/urbanicity) on trauma outcomes after controlling for specific injury-related risk factors., Study Design: All pediatric (age < 18) trauma patients admitted to a single level 1 trauma center with a statewide, largely rural, catchment area from January 2010 to December 2020 were retrospectively reviewed (n = 14,398). Primary outcomes were receipt of opioids in the emergency department, post-discharge rehabilitation referrals, and mortality. Multivariate logistic regressions evaluated demographic, socioeconomic, and injury characteristics. Multilevel logistic regressions evaluated area-level indicators, which were derived from abstracted home addresses., Results: Analyses adjusting for demographic and injury characteristics revealed that Black children (n = 6255) had significantly lower odds (OR = 0.87) of being prescribed opioid medications in the emergency department compared to White children (n = 5883). Children living in more distressed and rural communities had greater odds of receiving opioid medications. Girls had significantly lower odds (OR = 0.61) of being referred for rehabilitation services than boys. Post hoc analyses revealed that Black girls had the lowest odds of receiving rehabilitation referrals compared to Black boys and White children., Conclusion: Results highlight the need to examine both main and interactive effects of social determinants on trauma care and outcomes. Findings reinforce and expand into the pediatric population the growing notion that traumatic injury care is not immune to disparities., (© 2022. W. Montague Cobb-NMA Health Institute.)
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- 2023
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14. Interventional Radiology Management of Adult Liver Transplant Complications.
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Naidu SG, Alzubaidi SJ, Patel IJ, Iwuchukwu C, Zurcher KS, Malik DG, Knuttinen MG, Kriegshauser JS, Wallace AL, Katariya NN, Mathur AK, and Oklu R
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- Adult, Constriction, Pathologic etiology, Humans, Portal Vein diagnostic imaging, Radiology, Interventional, Treatment Outcome, Liver Transplantation adverse effects, Portasystemic Shunt, Transjugular Intrahepatic, Thrombosis etiology, Vascular Diseases etiology, Venous Thrombosis
- Abstract
Liver transplant remains the definitive therapy for patients with end-stage liver disease. Outcomes have continued to improve, in part owing to interventions used to treat posttransplant complications involving the hepatic arteries, portal vein, hepatic veins or inferior vena cava (IVC), and biliary system. Significant hepatic artery stenosis can be treated with angioplasty or stent placement to prevent thrombosis and biliary ischemic complications. Hepatic arterioportal fistula and hepatic artery pseudoaneurysm are rare complications that can often be treated with endovascular means. Treatment of hepatic artery thrombosis can have mixed results. Portal vein stenosis can be treated with venoplasty or more commonly stent placement. The rarer portal vein thrombosis can also be treated with endovascular techniques. Hepatic venous outflow stenosis of the hepatic veins or IVC is amenable to venoplasty or stent placement. Complications of the bile ducts are the most encountered complication after liver transplant. When not amenable to endoscopic intervention, biliary stricture, bile leak, and ischemic cholangiopathy can be treated with percutaneous transhepatic cholangiography with biliary drainage and other interventions. New techniques have further improved care for these patients. Transsplenic portal vein recanalization has improved transplant candidacy for patients with chronic portal vein thrombosis. Spontaneous splenorenal shunt and splenic artery steal syndrome (nonocclusive hepatic artery hypoperfusion syndrome) remain complicated topics, and the role of endovascular embolization is developing. When patients have recurrence of cirrhosis after transplant, most commonly due to viral hepatitis, transjugular intrahepatic portosystemic shunt (TIPS) may be required to treat symptoms of portal hypertension. Online supplemental material is available for this article.
© RSNA, 2022.- Published
- 2022
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15. Social determinants of trauma care: Associations of race, insurance status, and place on opioid prescriptions, postdischarge referrals, and mortality.
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Grenn E, Kutcher M, Hillegass WB, Iwuchukwu C, Kyle A, Bruehl S, Goodin B, Myers H, Rao U, Nag S, Kinney K, Dickens H, and Morris MC
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- Adolescent, Adult, Female, Humans, Insurance Coverage, Male, Middle Aged, Patient Discharge, Prescriptions, Referral and Consultation, Retrospective Studies, Social Determinants of Health, Trauma Centers, Aftercare, Analgesics, Opioid
- Abstract
Background: Racial disparities in trauma care have been reported for a range of outcomes, but the extent to which these remain after accounting for socioeconomic and environmental factors remains unclear. The objective of this study was to evaluate the unique contributions of race, health insurance, community distress, and rurality/urbanicity on trauma outcomes after carefully controlling for specific injury-related risk factors., Methods: All adult (age, ≥18 years) trauma patients admitted to a single Level I trauma center with a statewide, largely rural, catchment area from January 2010 to December 2020 were retrospectively reviewed. Primary outcomes were mortality, rehabilitation referral, and receipt of opioids in the emergency department. Demographic, socioeconomic, and injury characteristics as well as indicators of community distress and rurality based on home address were abstracted from a trauma registry database., Results: Analyses revealed that Black patients (n = 13,073) were younger, more likely to be male, more likely to suffer penetrating injuries, and more likely to suffer assault-based injuries compared with White patients (n = 10,946; all p < 0.001). In adjusted analysis, insured patients had a 28% lower risk of mortality (odds ratio, 0.72; p = 0.005) and were 92% more likely to be referred for postdischarge rehabilitation than uninsured patients (odds ratio, 1.92; p = 0.005). Neither race- nor place-based factors were associated with mortality. However, post hoc analyses revealed a significant race by age interaction, with Black patients exhibiting more pronounced increases in mortality risk with increasing age., Conclusion: The present findings help disentangle the social determinants of trauma disparities by adjusting for place and person characteristics. Uninsured patients were more likely to die and those who survived were less likely to receive referrals for rehabilitation services. The expected racial disparity in mortality risk favoring White patients emerged in middle age and was more pronounced for older patients., Level of Evidence: Prognostic and epidemiological, Level III., (Copyright © 2021 Wolters Kluwer Health, Inc. All rights reserved.)
- Published
- 2022
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16. Application of the modified Nutrition Risk in Critically Ill score to nutritional risk stratification of trauma victims: A multicenter observational study.
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Iwuchukwu C, O'Keefe GE, Day AG, Jiang X, and Heyland DK
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- Adult, Aged, Aged, 80 and over, Critical Illness mortality, Critical Illness therapy, Female, Hospital Mortality, Humans, Intensive Care Units, Internationality, Male, Malnutrition epidemiology, Malnutrition mortality, Middle Aged, Prognosis, Retrospective Studies, Risk, Young Adult, Malnutrition therapy, Nutritional Status, Nutritional Support, Wounds and Injuries mortality, Wounds and Injuries therapy
- Abstract
Background: The modified Nutrition Risk in Critically Ill (mNUTRIC) score was developed to identify patients most likely to benefit from nutritional therapies and to stratify or select study subjects for clinical trials. The score is not validated in trauma victims in whom adequate nutritional support is important and difficult to achieve. We sought to determine whether a higher mNUTRIC score was associated with worse outcomes and whether caloric and protein intake improved outcome more in patients classified as high risk relative to those classified as low risk., Methods: We analyzed a prospectively collected database of patients from intensive care units globally. The primary outcome was 60-day hospital mortality, and the secondary outcome was time to discharge alive. We compared outcomes between high and low mNUTRIC score groups and also tested whether the association between outcome and nutrition intake was modified by the mNUTRIC score., Results: A total of 771 trauma patients were included. Most (585; 76%) had a low-risk mNUTRIC (0-4) score, and 186 (24%) had a high-risk (5-9) mNUTRIC score. The overall 60-day mortality was 13%. Patients in the high mNUTRIC group had a higher risk of death than those in the low mNUTRIC group (adjusted odds ratio, 2.6; 95% confidence interval, 1.7-4.2). Overall, there was no relationship between caloric or protein intake and clinical outcomes. However, patients in the high mNUTRIC group fared better with increasing caloric and protein intake, whereas subjects in the low mNUTRIC score group did not (p values for interaction with the mNUTRIC score for time to discharge alive was p = 0.014 for calories and was p = 0.004 for protein)., Conclusion: A high mNUTRIC score identifies trauma patients at higher risk for poor outcomes and those who may benefit from higher caloric and protein intake., Level of Evidence: Epidemiological/Prognostic, level III.
- Published
- 2020
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17. Management of a Penetrating Retrohepatic Vena Cava Injury.
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Han D, Mishra A, Batson S, Koller F, and Iwuchukwu C
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- Humans, Male, Tomography, X-Ray Computed, Vascular System Injuries diagnosis, Vascular System Injuries etiology, Vena Cava, Inferior surgery, Wounds, Penetrating complications, Wounds, Penetrating diagnosis, Young Adult, Laparotomy methods, Vascular Surgical Procedures methods, Vascular System Injuries surgery, Vena Cava, Inferior injuries, Wounds, Penetrating surgery
- Published
- 2020
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18. Expression-Based Cell Lineage Analysis in Drosophila Through a Course-Based Research Experience for Early Undergraduates.
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Olson JM, Evans CJ, Ngo KT, Kim HJ, Nguyen JD, Gurley KGH, Ta T, Patel V, Han L, Truong-N KT, Liang L, Chu MK, Lam H, Ahn HG, Banerjee AK, Choi IY, Kelley RG, Moridzadeh N, Khan AM, Khan O, Lee S, Johnson EB, Tigranyan A, Wang J, Gandhi AD, Padhiar MM, Calvopina JH, Sumra K, Ou K, Wu JC, Dickan JN, Ahmadi SM, Allen DN, Mai VT, Ansari S, Yeh G, Yoon E, Gon K, Yu JY, He J, Zaretsky JM, Lee NE, Kuoy E, Patananan AN, Sitz D, Tran P, Do MT, Akhave SJ, Alvarez SD, Asem B, Asem N, Azarian NA, Babaesfahani A, Bahrami A, Bhamra M, Bhargava R, Bhatia R, Bhatia S, Bumacod N, Caine JJ, Caldwell TA, Calica NA, Calonico EM, Chan C, Chan HH, Chang A, Chang C, Chang D, Chang JS, Charania N, Chen JY, Chen K, Chen L, Chen Y, Cheung DJ, Cheung JJ, Chew JJ, Chew NB, Chien CT, Chin AM, Chin CJ, Cho Y, Chou MT, Chow KK, Chu C, Chu DM, Chu V, Chuang K, Chugh AS, Cubberly MR, Daniel MG, Datta S, Dhaliwal R, Dinh J, Dixit D, Dowling E, Feng M, From CM, Furukawa D, Gaddipati H, Gevorgyan L, Ghaznavi Z, Ghosh T, Gill J, Groves DJ, Gurara KK, Haghighi AR, Havard AL, Heyrani N, Hioe T, Hong K, Houman JJ, Howland M, Hsia EL, Hsueh J, Hu S, Huang AJ, Huynh JC, Huynh J, Iwuchukwu C, Jang MJ, Jiang AA, Kahlon S, Kao PY, Kaur M, Keehn MG, Kim EJ, Kim H, Kim MJ, Kim SJ, Kitich A, Kornberg RA, Kouzelos NG, Kuon J, Lau B, Lau RK, Law R, Le HD, Le R, Lee C, Lee C, Lee GE, Lee K, Lee MJ, Lee RV, Lee SHK, Lee SK, Lee SD, Lee YJ, Leong MJ, Li DM, Li H, Liang X, Lin E, Lin MM, Lin P, Lin T, Lu S, Luong SS, Ma JS, Ma L, Maghen JN, Mallam S, Mann S, Melehani JH, Miller RC, Mittal N, Moazez CM, Moon S, Moridzadeh R, Ngo K, Nguyen HH, Nguyen K, Nguyen TH, Nieh AW, Niu I, Oh SK, Ong JR, Oyama RK, Park J, Park YA, Passmore KA, Patel A, Patel AA, Patel D, Patel T, Peterson KE, Pham AH, Pham SV, Phuphanich ME, Poria ND, Pourzia A, Ragland V, Ranat RD, Rice CM, Roh D, Rojhani S, Sadri L, Saguros A, Saifee Z, Sandhu M, Scruggs B, Scully LM, Shih V, Shin BA, Sholklapper T, Singh H, Singh S, Snyder SL, Sobotka KF, Song SH, Sukumar S, Sullivan HC, Sy M, Tan H, Taylor SK, Thaker SK, Thakore T, Tong GE, Tran JN, Tran J, Tran TD, Tran V, Trang CL, Trinh HG, Trinh P, Tseng HH, Uotani TT, Uraizee AV, Vu KKT, Vu KKT, Wadhwani K, Walia PK, Wang RS, Wang S, Wang SJ, Wiredja DD, Wong AL, Wu D, Xue X, Yanez G, Yang YH, Ye Z, Yee VW, Yeh C, Zhao Y, Zheng X, Ziegenbalg A, Alkali J, Azizkhanian I, Bhakta A, Berry L, Castillo R, Darwish S, Dickinson H, Dutta R, Ghosh RK, Guerin R, Hofman J, Iwamoto G, Kang S, Kim A, Kim B, Kim H, Kim K, Kim S, Ko J, Koenig M, LaRiviere A, Lee C, Lee J, Lung B, Mittelman M, Murata M, Park Y, Rothberg D, Sprung-Keyser B, Thaker K, Yip V, Picard P, Diep F, Villarasa N, Hartenstein V, Shapiro C, Levis-Fitzgerald M, Jaworski L, Loppato D, Clark IE, and Banerjee U
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- Animals, Brain, Eye, Gene Expression, Lymphatic System, Research, Students, Universities, Wings, Animal, Cell Lineage, Drosophila genetics
- Abstract
A variety of genetic techniques have been devised to determine cell lineage relationships during tissue development. Some of these systems monitor cell lineages spatially and/or temporally without regard to gene expression by the cells, whereas others correlate gene expression with the lineage under study. The G AL4 T echnique for R eal-time a nd C lonal E xpression (G-TRACE) system allows for rapid, fluorescent protein-based visualization of both current and past GAL4 expression patterns and is therefore amenable to genome-wide expression-based lineage screens. Here we describe the results from such a screen, performed by undergraduate students of the University of California, Los Angeles (UCLA) Undergraduate Research Consortium for Functional Genomics (URCFG) and high school summer scholars as part of a discovery-based education program. The results of the screen, which reveal novel expression-based lineage patterns within the brain, the imaginal disc epithelia, and the hematopoietic lymph gland, have been compiled into the G-TRACE Expression Database (GED), an online resource for use by the Drosophila research community. The impact of this discovery-based research experience on student learning gains was assessed independently and shown to be greater than that of similar programs conducted elsewhere. Furthermore, students participating in the URCFG showed considerably higher STEM retention rates than UCLA STEM students that did not participate in the URCFG, as well as STEM students nationwide., (Copyright © 2019 Olson et al.)
- Published
- 2019
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19. Ventilator-associated events, not ventilator-associated pneumonia, is associated with higher mortality in trauma patients.
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Meagher AD, Lind M, Senekjian L, Iwuchukwu C, Lynch JB, Cuschieri J, and Robinson BRH
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- Female, Humans, Length of Stay statistics & numerical data, Male, Middle Aged, Quality Indicators, Health Care, Registries, Respiration, Artificial mortality, Retrospective Studies, Wounds and Injuries therapy, Pneumonia, Ventilator-Associated mortality, Respiration, Artificial adverse effects, Wounds and Injuries mortality
- Abstract
Background: Ventilator-associated events (VAE), using objective diagnostic criteria, are the preferred quality indicator for patients requiring mechanical ventilation (MV) for greater than 48 hours. We aim to identify the occurrence of VAE in our trauma population, the impact on survival, and length of stay, as compared to the traditional definition of ventilator-associated pneumonia (VAP)., Methods: This retrospective review included adult trauma patients, who were Washington residents, admitted between 2012 and 2017, and required at least 3 days of MV. Exclusions included patients with Abbreviated Injury Scale head score greater than 4 and burn related mechanisms of injury. We matched trauma registry data with our institutional, physician-adjudicated, and culture-confirmed ventilator event database. We compared the clinical outcomes of ventilator-free days, intensive care unit length of stay, hospital length of stay, and likelihood of death between VAE and VAP., Results: One thousand five hundred thirty-three trauma patients met criteria; 124 (8.1%) patients developed VAE, 114 (7.4%) patients developed VAP, and 63 (4.1%) patients met criteria for both VAE and VAP. After adjusted analyses, patients with VAE were more likely to die (hazard ratio [HR], 2.86; 95% confidence interval [CI], 1.44-5.68), than those with VAP, as well those patients with neither diagnosis (HR, 2.83; 95% CI, 1.83-4.38). Patients with VAP were no more likely to die (HR, 1.55; 95% CI, 0.91-2.68) than those with neither diagnosis. Patients with VAE had fewer ventilator-free days than those with VAP (HR, -2.71; 95% CI, -4.74 to -0.68)., Conclusion: Critically injured trauma patients who develop VAE are three times more likely to die and utilize almost 3 days more MV than those that develop VAP. The objective criteria of VAE make it a promising indicator on which quality indicator efforts should be focused. Future studies should be aimed at identification of modifiable risk factors for VAE and their impact on outcome, as these patients are at high risk for death., Level of Evidence: Retrospective cohort study, level III.
- Published
- 2019
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20. Can a Total Knee Arthroplasty Perioperative Surgical Home Close the Gap Between Primary and Revision TKA Outcomes?
- Author
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Iwuchukwu C, Wright D, Sofine A, and Schwarzkopf R
- Subjects
- Aged, Aged, 80 and over, Arthroplasty, Replacement, Knee economics, Cross-Sectional Studies, Female, Health Care Costs, Humans, Knee Joint surgery, Length of Stay economics, Male, Middle Aged, Prospective Studies, Reoperation, Treatment Outcome, United States, Arthroplasty, Replacement, Knee methods, Knee Prosthesis, Patient Satisfaction
- Abstract
Given the steady increase in the number of primary and revision total knee arthroplasties (TKAs) performed in the United States, we wanted to determine if an evidence-based TKA perioperative surgical home could close the perioperative morbidity gap between primary and revision TKAs. We conducted a prospective cross-sectional cohort study comparing outcomes of patients who had primary TKA (n = 235) with outcomes of patients who had revision TKA (n = 50). We measured several perioperative outcomes: length of stay, discharge disposition, 30-day readmission rate, and 30-day reoperation rate. Mean length of stay was 2.55 days for primary TKA and 2.92 days for revision TKA (P = .061). Eighty (34%) of the 235 primary TKA patients and 21 (41%) of the 51 revision TKA patients were discharged to a subacute nursing facility (P = .123). One primary TKA patient (0.4%) and 2 revision TKA patients (4%) were readmitted within 30 days after surgery (P = .081). None of the primary TKAs and 2 (4%) of the revision TKAs underwent reoperation (P = .993). There was no difference in perioperative outcomes between the primary and revision TKA groups in our Total Joint Replacement Perioperative Surgical Home (TJR-PSH) cohort. Advances in multidisciplinary co-management of TKA patients are highlighted in the TJR-PSH. The similarity in primary and revision TKA outcomes has significant implications regarding costs and potential increased patient satisfaction.
- Published
- 2016
21. Thrombospondin-1-induced vascular smooth muscle cell migration and proliferation are functionally dependent on microRNA-21.
- Author
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Stein JJ, Iwuchukwu C, Maier KG, and Gahtan V
- Subjects
- Cells, Cultured, Enzyme Activation, Extracellular Signal-Regulated MAP Kinases metabolism, Graft Occlusion, Vascular etiology, Graft Occlusion, Vascular metabolism, Humans, Hyaluronan Synthases, MicroRNAs antagonists & inhibitors, Phosphorylation, Cell Movement physiology, Cell Proliferation, Glucuronosyltransferase metabolism, MicroRNAs physiology, Myocytes, Smooth Muscle metabolism, Thrombospondin 1 physiology, Transforming Growth Factor beta2 metabolism
- Abstract
Objectives: Thrombospondin-1 (TSP-1) is a matricellular glycoprotein released from platelets at sites of arterial injury and is important in neointima development after balloon angioplasty. MicroRNAs are small noncoding RNAs that function by binding target gene mRNA and inhibiting protein translation. MicroRNA-21 (miR-21) is up-regulated after angioplasty, and inhibition of miR-21 leads to decreased intimal hyperplasia. In this study, we examined the effects of miR-21 inhibition on vascular smooth muscle cell (VSMC) processes., Methods: VSMCs were exposed to TSP-1 and miR-21 inhibitor for 20 minutes. TSP-1-induced migration was assessed with a modified Boyden microchemotaxis chamber and proliferation with calcein-AM fluorescence. Phosphorylated extracellular signaling kinase (ERK) 1/2 expression was determined by Western Blot and densitometry. Quantitative real-time polymerase chain reaction for TSP-1, hyaluronic acid synthase 2 (HAS2), and transforming growth factor beta 2 (TGFβ2) was performed. Statistical analysis was performed with analysis of variance (P < .05)., Results: Inhibition of miR-21 blocked TSP-1-induced VSMC migration, proliferation, and ERK 1/2 phosphorylation (P < .05) and had no effect on TSP-1-stimulated expression of genes for TSP-1, HAS2, or TGFβ2 (P > .05)., Conclusion: Acute inhibition of miR-21 led to a decrease in VSMC migration and proliferation caused by TSP-1. The decrease in TSP-1's activation of ERK 1/2 after acute miR-21 inhibition indicates an active role for miR-21 in TSP-1's cell signaling cascade. No effect on TSP-1-induced expression of the pro-stenotic genes thbs1, tgfb2, or has2, occurred after acute miR-21 inhibition. These data indicate that miR-21 directly modulates cell function and signaling pathways in ways other than inhibition of protein translation., (Copyright © 2014 Mosby, Inc. All rights reserved.)
- Published
- 2014
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22. Thrombospondin-1-induced smooth muscle cell chemotaxis and proliferation are dependent on transforming growth factor-β2 and hyaluronic acid synthase.
- Author
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Stein JJ, Iwuchukwu C, Maier KG, and Gahtan V
- Subjects
- Angioplasty, Balloon adverse effects, Cell Degranulation, Cell Proliferation, Enzyme Activation, Glucuronosyltransferase antagonists & inhibitors, Humans, Hyaluronan Synthases, Hymecromone pharmacology, Mitogen-Activated Protein Kinase 3 metabolism, Muscle, Smooth, Vascular cytology, Muscle, Smooth, Vascular metabolism, Muscle, Smooth, Vascular physiology, Myocytes, Smooth Muscle physiology, Signal Transduction, Transforming Growth Factor beta2 antagonists & inhibitors, Vascular System Injuries metabolism, Chemotaxis physiology, Glucuronosyltransferase metabolism, Myocytes, Smooth Muscle metabolism, Thrombospondin 1 metabolism, Transforming Growth Factor beta2 metabolism
- Abstract
Angioplasty causes local vascular injury, leading to the release of thrombospondin-1 (TSP-1), which stimulates vascular smooth muscle cell (VSMC) migration and proliferation, important steps in the development of intimal hyperplasia. Transforming growth factor beta 2 (TGF-β2) and hyaluronic acid synthase (HAS) are two pro-stenotic genes upregulated in VSMCs by TSP-1. We hypothesized that inhibition of TGF-β2 or HAS would inhibit TSP-1-induced VSMC migration, proliferation, and TSP-1 signaling. Our data demonstrate that Inhibition of either TGF-β2 or HAS inhibited TSP-1-induced VSMC migration and proliferation. Activation of ERK 1 was decreased by TGF-β2 inhibition and unaffected by HAS inhibition. TGF-β2 and HAS are not implicated in TSP-1-induced thbs1 expression, while they are each implicated in TSP-1-induced expression of their own gene. In summary, TSP-1-induced VSMC migration and proliferation rely on intact TGF-β2 signaling and HAS function. TSP-1 activation of ERK 1 is dependent on TGF-β2. These data further expand our understanding of the complexity of TSP-1 cellular signaling and the involvement of TGF-β2 and HAS.
- Published
- 2013
- Full Text
- View/download PDF
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