Publications by authors named "Shawn Obi"

5 Publications

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Uptake of Total Mesorectal Excision and Total Mesorectal Excision Grading for Rectal Cancer: A Statewide Study.

Dis Colon Rectum 2020 01;63(1):53-59

Department of Surgery, Michigan Medicine, Ann Arbor, Michigan.

Background: Total mesorectal excision is associated with decreased local recurrence and improved disease-free survival following rectal cancer resection. The extent to which total mesorectal excision has been adopted in the United States is unknown.

Objective: We sought to assess trends in total mesorectal excision performance and grading in Michigan hospitals.

Design: This is a retrospective cohort study from the Michigan Surgical Quality Collaborative. Trends in total mesorectal excision performance and grade assignment were analyzed by using χ tests and linear regression.

Settings: Participating hospitals (initially 14 hospitals, now 38) abstracted medical records data for rectal cancer cases from 2007 to 2016.

Patients: Patients who underwent rectal cancer resection were included.

Main Outcome Measure: The main outcome measures were surgeon-documented total mesorectal excision performance and pathologist-reported total mesorectal excision grade.

Results: Of 510 rectal cancer cases, 367 (72.0%) had surgeon-reported total mesorectal excision performance and 78 (15.3%) had pathologist-reported total mesorectal excision grade. Between-hospital variability in total mesorectal excision performance ranged from 0% to 97% and total mesorectal excision grading ranged from 0% to 90%. Total mesorectal excision grading was associated with a higher likelihood of also having adequate lymph node assessment (88.5% versus 71.9%, p = 0.002). There has been a statistically significant trend toward an increase in total mesorectal excision grading in the original 14 hospitals (p = 0.001), but not in the complete cohort of all hospitals (p = 0.057).

Limitations: This is a retrospective cohort design with sampled rectal cancer cases. In addition, there is insufficient granularity to capture all factors associated with total mesorectal excision performance or grade assignment.

Conclusions: The rates of total mesorectal excision performance and grade assignment are widely variable throughout the state of Michigan. Overall, grade assignment remains very low. This suggests an opportunity for quality improvement projects to increase total mesorectal excision performance and grading, involving both the surgeons and pathologists for effective implementation. See Video Abstract at http://links.lww.com/DCR/B53. IMPLEMENTACIÓN DE LA ESCISIÓN MESORRECTAL TOTAL Y LA CLASIFICACIÓN POR ESCISIÓN MESORRECTAL TOTAL PARA EL CÁNCER RECTAL: UN ESTUDIO A NIVEL ESTATAL.: La escisión mesorrectal total se asocia con una menor recurrencia local y una mejor supervivencia libre de enfermedad después de la resección del cáncer rectal. Se desconoce hasta que punto se ha adoptado la escisión mesorrectal total en los Estados Unidos.Se intento evaluar las tendencias en el rendimiento y la clasificación de la escisión mesorrectal total en los hospitales de Michigan.Este es un estudio de cohorte retrospectivo de la "Michigan Surgical Quality Collaborative". Las tendencias en el rendimiento de la escisión mesorrectal total y la asignación de grado se analizaron mediante pruebas de chi-cuadrada y regresión lineal.Los hospitales participantes (inicialmente 14 hospitales, ahora 38) extrajeron datos de registros médicos de los casos de cáncer rectal desde 2007 hasta 2016.Pacientes que se sometieron a resección de cáncer rectal.Las principales medidas de resultado fueron el rendimiento de la escisión mesorrectal total documentado por el cirujano y el grado de escisión mesorrectal total informada por el patólogo.De 510 casos de cáncer rectal, 367 (72.0%) tenían un rendimiento de escisión mesorrectal total reportado por el cirujano y 78 (15.3%) tenían un grado de escisión mesorrectal total reportado por el patólogo. La variabilidad entre hospitales en el rendimiento de la escisión mesorrectal total varió del 0 al 97% y la clasificación de la escisión mesorrectal total varió del 0 al 90%. La clasificación de la escisión mesorrectal total se asoció con una mayor probabilidad de tener también una evaluación adecuada de los ganglios linfáticos (88.5% versus 71.9%, p = 0.002). Ha habido una tendencia estadísticamente significativa hacia un aumento en la clasificación de la escisión mesorrectal total en los 14 hospitales originales (p = 0.001), pero no en la cohorte completa de todos los hospitales (p = 0.057).Diseño de cohorte retrospectivo con casos de cáncer rectal muestreados. Además, no hay suficiente granularidad para capturar todos los factores asociados con el rendimiento de la escisión mesorrectal total o la asignación de grados.Las tasas de rendimiento de escisión mesorrectal total y asignación de grado son muy variables en todo el estado de Michigan. En general, la asignación de calificaciones sigue siendo muy baja. Esto sugiere una oportunidad para que los proyectos de mejora de la calidad aumenten el rendimiento y la clasificación de la escisión mesorrectal total, involucrando tanto a los cirujanos como a los patólogos para una implementación efectiva. Vea el resumen del video en http://links.lww.com/DCR/B53.
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http://dx.doi.org/10.1097/DCR.0000000000001526DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6895431PMC
January 2020

Conventional Epidural vs Transversus Abdominis Plane Block with Liposomal Bupivacaine: A Randomized Trial in Colorectal Surgery.

J Am Coll Surg 2018 07 1;227(1):78-83. Epub 2018 May 1.

Department of Surgery, Henry Ford Allegiance Health, Jackson, MI. Electronic address:

Background: Colorectal surgery is a focus of enhanced recovery protocols (ERP). The use of transversus abdominis plane (TAP) block for abdominal surgery has demonstrated effectiveness in ERP, however, no direct comparison of epidural vs TAP for nonanalgesic clinical factors has been published to date. The primary aim of this study was to compare epidural with TAP for length of stay in colorectal surgery.

Study Design: Patients undergoing open and laparoscopic colorectal surgery were prospectively randomized into epidural (n = 39) or TAP (n = 44) groups preoperatively. Anesthesiologists performed blocks in the preoperative area. A standardized ERP and discharge protocol were initiated on patients. Five patients unable to complete the ERP due to unrelated postoperative complications or technical factors were excluded from analysis.

Results: The study arms were statistically similar for demographic factors, operations, and intraoperative measures. Time to first flatus was equivalent in both groups (postoperative day 1.7 vs 1.9; p = 0.39). Length of stay was shorter with TAP (postoperative day 3.3 vs 2.8; p = 0.023). Postoperative nausea and vomiting rates were higher with TAP (14% vs 33%; p = 0.057). Urinary retention occurred with higher frequency with epidural (30% vs 15%; p = 0.11).

Conclusions: Transversus abdominis plane block was associated with a 0.5-day reduction in length of stay in a standardized ERP compared with epidural. Early indication favors TAP in patients with a history of postoperative urinary retention, as a trend of urinary retention was associated with epidural. Transversus abdominis plane block offers an effective alternative to epidural in colorectal surgery, regardless of operative approach.
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http://dx.doi.org/10.1016/j.jamcollsurg.2018.04.021DOI Listing
July 2018

Robot Assisted Repair of Acquired Abdominal Intercostal Hernias (AIH).

Spartan Med Res J 2017 Aug 24;2(1):5964. Epub 2017 Aug 24.

Henry Ford Allegiance General Surgeon, General Surgeon Teaching Facility, Jackson, M.

Abdominal intercostal hernia (AIH) is a rare clinical entity in which intra-abdominal visceral contents protrude through a defect between adjacent ribs. Most AIH are repaired via (an open or a laparoscopic) transabdominal approach or a thoracotomy. In this paper, the authors present two cases of AIH. Both cases of AIH developed in male patients after severe coughing episodes and demonstrated on computed tomography (CT) to include multiple abdominal viscera. In both cases, a robot-assisted laparoscopic hernia repair was performed utilizing Sepramesh and V-Lock suturing. To our knowledge, these are the first case reports of a robotic approach to repair of AIH. Both cases demonstrate the safety of this approach and expand on novel robotic approaches to ventral hernia repairs. Studies of longer term outcomes from this surgical approach are limited in the literature due to small number of cases and even fewer associated case reports.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7746031PMC
August 2017

Intraoperative Fluid Resuscitation Strategies in Pancreatectomy: Results from 38 Hospitals in Michigan.

Ann Surg Oncol 2016 09 26;23(9):3047-55. Epub 2016 Apr 26.

Department of Surgery, Henry Ford Health System, Detroit, MI, USA.

Background: Fluid administration practices may affect complication rates in some abdominal surgeries, but effects in patients undergoing pancreatectomy are not understood well. We sought to determine whether amount of intraoperative fluid administered to patients undergoing pancreatectomy is associated with postoperative complication rates and to determine whether hospitals vary in their fluid administration practices.

Methods: Data for 504 patients undergoing pancreatectomy at 38 hospitals between 2012 and 2015 were evaluated. The main exposure was intraoperative fluid administration (≤10, 10-15, >15 mL/kg/h). Mortality, complications, and length of stay were the main outcomes of interest. Patient-level associations between exposure and outcome were tested, with adjustment for potentially confounding patient and surgical factors, using random intercept, mixed-effects linear or logistic regression models. Hospitals were then categorized as having a restrictive, intermediate, or liberal resuscitation practice, and adjusted outcomes were compared.

Results: A total of 167 (33.1 %), 185 (36.7 %) and 152 (30.2 %) patients received restrictive, intermediate, or liberal fluid administration, respectively. Hospitals with more restrictive practices had significantly lower adjusted 30-day mortality than those with more liberal practices (2.7 vs. 6.6 %; P < 0.001). Hospitals with more restrictive practices had the lowest rates of severe (Grade 2 and 3) complications (15.4 % restrictive vs. 25.3 % intermediate vs. 44.3 % liberal; P < 0.001). More restrictive hospitals had decreased adjusted mean length of stay (9.5 days vs. 12.7 days intermediate vs. 11.6 days liberal; P < 0.001).

Conclusions: More restrictive intraoperative resuscitation practices in pancreatectomy are associated with decreased hospital-level mortality, severe complications, and length of stay.
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http://dx.doi.org/10.1245/s10434-016-5235-yDOI Listing
September 2016

Heparin-coated stents do not protect cancer patients from cardiac complications after noncardiac surgery.

Am Surg 2009 Jan;75(1):61-5

Department of Surgery, Loyola University Medical Center, Maywood, Illinois 60153, USA.

Previous studies regarding preoperative coronary stents and antithrombotic agents have excluded patients with cancer as a result of hypercoagulability. The objective of this study is to determine whether preoperative heparin-coated coronary stents are as safe in patients with cancer undergoing surgery as patients without cancer. Between February 2003 and February 2005, 29 patients had heparin-coated coronary stents placed before noncardiac surgery. The incidence of postoperative myocardial infarction (MI) and/or death was compared in patients with and without cancer, and outcomes were further evaluated based on preoperative antithrombotic status. Postoperative MI occurred in three of 13 (23%) patients with cancer compared with zero of 16 noncancer patients. Patients with cancer were 9.6 times more likely to have a postoperative MI resulting in death compared with noncancer patients. There was a positive correlation between patients having cancer and having a postoperative MI (r = 0.38, P = 0.044) and between patients with cancer being on antithrombotic medications during surgery and having a postoperative MI (r = 0.567, P = 0.044). After stent placement, patients with cancer undergoing surgery experienced a higher incidence of postoperative MI resulting in death compared with noncancer patients despite continued antithrombotic use. In these patients, alternatives to stenting should be considered to avoid perioperative cardiac complications.
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January 2009