Racial and Ethnic Disparities in Emergency General Surgery Outcomes Among Older Adult Patients.

INTRODUCTION: Racial and ethnic disparities in emergency general surgery (EGS) patients have been well described in the literature. Nonetheless, the burden of these disparities, specifically within the more vulnerable older adult population, is relatively unknown. This study aims to investigate racial and ethnic disparities in clinical outcomes among older adult patients undergoing EGS. METHODS: This retrospective analysis used data from 2013 to 2019 American College of Surgeons National Surgery Quality Improvement Program database. EGS patients aged 65 y or older were included. Patients were categorized based on their self-reported race and ethnicity. The primary outcomes evaluated were in-hospital mortality, 30-d mortality, and overall morbidity. Multivariable logistic regression was performed to examine the relationship between race/ethnicity and postoperative outcomes while adjusting for relevant factors including age, comorbidities, functional status, preoperative conditions, and surgical procedure. RESULTS: A total of 54,132 patients were included, of whom 79.8% identified as non-Hispanic White, 9.5% as non-Hispanic Black (NHB), 5.8% as Hispanic, and 4.2% as non-Hispanic Asian. After risk adjustment, compared to non-Hispanic White patients, NHB, non-Hispanic Asian, and Hispanic patients had decreased odds of 30-d mortality. For 30-d readmission and reoperation, differences among groups were comparable. However, NHB patients had significantly increased odds of overall morbidity (adjusted odds ratio, 1.18; 95% confidence interval: 1.10-1.26; P < 0.001) and postoperative complications including sepsis, venous thromboembolism, and unplanned intubation. Hispanic ethnicity was associated with lower odds of postoperative myocardial infarction and stroke. CONCLUSIONS: Among older adult patients undergoing emergency general surgery, minority patients experienced higher morbidity rates, but paradoxical disparities in mortality were detected. Further research is necessary to identify the cause of these disparities and develop targeted interventions to eliminate them.

Debunking the "Obesity Paradox": Obesity Is Associated With Adverse Outcomes in Emergency General Surgery.

INTRODUCTION: Obesity is increasingly prevalent both nationwide and in the emergency general surgery (EGS) population. While previous studies have shown that obesity may be protective against mortality following EGS procedures, the association between body mass index (BMI) and postoperative outcomes, as well as intraoperative decision-making, remains understudied. METHODS: The National Surgical Quality Improvement Program 2015-2019 database was used to identify all adult patients undergoing an open abdominal or abdominal wall procedure for EGS conditions. Our outcomes included 30-d postoperative mortality, composite 30-d morbidity, delayed fascial closure, reoperation, operative time, and hospital length of stay (LOS). Multivariable logistic regression models were used to explore the association between BMI and each outcome of interest while adjusting for patient demographics, comorbidities, laboratory tests, preoperative and intraoperative variables. RESULTS: We identified 78,578 patients, of which 3121 (4%) were categorized as underweight, 23,661 (30.1%) as normal weight, 22,072 (28.1%) as overweight, 14,287 (18.2%) with class I obesity, 7370 (9.4%) with class II obesity, and 8067 (10.3%) with class III obesity. Class III obesity was identified as a risk factor for 30-d postoperative morbidity (adjusted odds ratio 1.14, 95% CI, 1.03-1.26, P < 0.01). An increase in obesity class was also associated with a stepwise increase in the risk of undergoing delayed fascial closure, experiencing a prolonged operative time, and having an extended LOS. CONCLUSIONS: Obesity class was associated with an increase in delayed fascial closure, longer operative time, higher reoperation rates, and extended hospital LOS. Further studies are needed to explore how a patient's BMI impacts intraoperative factors, influences surgical decision-making, and contributes to hospital costs.

Open Abdomen in Elderly Patients With Surgical Sepsis: Predictors of Mortality.

INTRODUCTION: Elderly patients are frequently presenting with emergency surgical conditions. The open abdomen technique is widely used in abdominal emergencies needing rapid control of intrabdominal contamination. However, specific predictors of mortality identifying candidates for comfort care are understudied. METHODS: The 2013-2017 the American College of Surgeons-National Surgical Quality Improvement Program database was queried for emergent laparotomies performed in geriatric patients with sepsis or septic shock in whom fascial closure was delayed. Patients with acute mesenteric ischemia were excluded. The primary outcome was 30-d mortality. Univariable analysis, followed by multivariable logistic regression, was performed. Mortality was computed for combinations of the five predictors with the highest odds ratios (OR). RESULTS: A total of 1399 patients were identified. The median age was 73 (69-79) y, and 54.7% were female. 30-d mortality was 50.6%. In the multivariable analysis, the most important predictors were as follows: American Society of Anesthesiologists status 5 (OR = 4.80, 95% confidence interval [CI], 1.85-12.49 P = 0.002), dialysis dependence (OR = 2.65, 95% CI 1.54-4.57, P < 0.001), congestive hearth failure (OR = 2.53, 95% CI 1.52-4.21, P < 0.001), disseminated cancer (OR = 2.61, 95% CI 1.55-4.38, P < 0.001), and preoperative platelet count of <100,000 cells/µL (OR = 1.87, 95% CI 1.15-3.04, P = 0.011). The presence of two or more of these factors resulted in over 80% mortality. The absence of all these risk factors results in a survival rate of 62.1%. CONCLUSIONS: In elderly patients, surgical sepsis or septic shock requiring an open abdomen for surgical management is highly lethal. The presence of several combinations of preoperative comorbidities is associated with a poor prognosis and can identify patients who can benefit from timely initiation of palliative care.

Preventable Morbidity and Mortality Among Non-trauma Emergency Surgery Patients: The Role of Personal Performance and System Flaws in Adverse Events.

BACKGROUND: Preventable morbidity and mortality among emergency surgery patients is not adequately analyzed. We aim to describe and classify preventable complications and deaths in this population. METHODS: The medical records and quality control documents of patients with emergency, non-trauma, surgical disease admitted between September 1, 2006, and August 31, 2018, and recorded to have a preventable or potentially preventable morbidity and mortality were reviewed. The primary outcome was a classification of the complications and deaths by a panel of experts, as attributable to issues of personal performance or system deficiencies. RESULTS: One hundred and fifty patients were identified (127 complications and 23 deaths). The most commonly encountered preventable complications were surgical-site infection (17%), bleeding (13%), injury to adjacent structures (12%), and anastomotic leak (8%). The majority of complications seemed to stem from personal performance (97%), due to either technical or judgment issues, and only 3% were linked with system flaws, either in the form of communication or inadequate protocols. Alcohol use disorder and duration of operation were different between patients with preventable adverse events related to technical issues and patients related to judgment issues; furthermore, more patients who experienced judgment issues died during hospital stay (p <0.05). CONCLUSION: Among emergency surgery patients, who suffer preventable complications and deaths, issues related to personal performance are more frequent than system flaws. Whereas the effort to improve systems should be unwavering, the emphasis on the surgeon's personal responsibility to avoid preventable complications should not be derailed.

Validation of Artificial Intelligence-Based POTTER Calculator in Emergency General Surgery Patients Undergoing Laparotomy: Prospective, Bi-Institutional Study.

BACKGROUND: The POTTER calculator, a widely used interpretable artificial intelligence (AI) risk calculator, has been validated in population-based studies and shown to predict outcomes in emergency general surgery (EGS) patients better than surgeons. We sought to prospectively validate POTTER. STUDY DESIGN: Patients undergoing an emergency exploratory laparotomy for non-trauma indications at two Academic Medical Centers between June 2020 and March 2022 were included. POTTER preoperative risk calculations and postoperative outcomes were systematically recorded. POTTER's performance in predicting 30-day postoperative mortality, septic shock, respiratory failure, bleeding, and pneumonia was assessed using the c-statistic methodology. RESULTS: A total of 361 patients were included. The median age was 63 years (IQR: 51-72), 45.4% were females, and the overall mortality and morbidity were 24.1% and 51.4%, respectively. POTTER predicted mortality accurately with a c-statistic of 0.90. POTTER also accurately predicted the occurrence of individual postoperative complications, with c-statistics ranging between 0.80 and 0.89. CONCLUSION: This is the first prospective validation of the AI-enabled POTTER calculator. The superior accuracy, user-friendliness, and interpretability of POTTER make it a useful bedside tool for preoperative patient and family counseling.

Traumatic lower extremity amputation as a risk factor for venous thromboembolism.

BACKGROUND: This study aimed to evaluate whether lower extremity (LE) amputation among civilian casualties is a risk factor for venous thromboembolism. METHODS: All patients with severe LE injuries (AIS ≥3) derived from the ACS-TQIP (2013-2020) were divided into those who underwent trauma-associated amputation and those with limb salvage. Propensity score matching was used to mitigate selection bias and confounding and compare the rates of pulmonary embolism (PE) and deep vein thrombosis (DVT). RESULTS: A total of 145,667 patients with severe LE injuries were included, with 3443 patients requiring LE amputation. After successful matching, patients sustaining LE amputation still experienced significantly higher rates of PE (4.2% vs. 2.5%, p â€‹< â€‹0.001) and DVT (6.5% vs. 3.4%, p â€‹< â€‹0.001). A sensitivity analysis examining patients with isolated major LE trauma similarly showed a higher rate of thromboembolic complications, including higher incidences of PE (3.2% vs. 2.0%, p â€‹= â€‹0.015) and DVT (4.7% vs. 2.6%, p â€‹< â€‹0.001). CONCLUSIONS: In this nationwide analysis, traumatic lower extremity amputation is associated with a significantly higher risk of VTE events, including PE and DVT.

Emergency general surgery in older adult patients: Factors associated with fragmented care.

BACKGROUND: Care fragmentation has been shown to lead to increased morbidity and mortality. We aimed to explore the factors related to care fragmentation after hospital discharge in geriatric emergency general surgery patients, as well as examine the association between care fragmentation and mortality. METHODS: We designed a retrospective study of the Nationwide Readmissions Database 2019. We included patients ≥65 years old admitted with an emergency general surgery diagnosis who were discharged alive from the index admission. The primary outcome was 90-day care fragmentation, defined as an unplanned readmission to a non-index hospital. Multivariable logistic regression was performed, adjusting for patient and hospital characteristics. RESULTS: A total of 447,027 older adult emergency general surgery patients were included; the main diagnostic category was colorectal (22.6%), and 78.2% of patients underwent non-operative management during the index hospitalization. By 90 days post-discharge, 189,622 (24.3%) patients had an unplanned readmission. Of those readmitted, 20.8% had care fragmentation. The median age of patients with care fragmentation was 76 years, and 53.2% were of female sex. Predictors of care fragmentation were living in rural counties (odds ratio 1.76, 95% confidence interval: 1.57-1.97), living in a low-income ZIP Code, discharge to intermediate care facility (odds ratio 1.28, 95% confidence interval: 1.22-1.33), initial non-operative management (odds ratio 1.17, 95% confidence interval: 1.12-1.23), leaving against medical advice (odds ratio 2.60, 95% confidence interval: 2.29-2.96), and discharge from private investor-owned hospitals (odds ratio 1.18, 95% confidence interval: 1.10-1.27). Care fragmentation was significantly associated with higher mortality. CONCLUSION: The burden of unplanned readmissions in older adult patients who survive an emergency general surgery admission is underestimated, and these patients frequently experience care fragmentation. Future directions should prioritize evaluating the impact of initiatives aimed at alleviating the incidence and complications of care fragmentation in geriatric emergency general surgery patients.

Patience is key: Association of surgical timing with clinical outcomes in elderly patients with sigmoid volvulus.

BACKGROUND: Current guidelines for sigmoid volvulus recommend endoscopy as a first line of treatment for decompression, followed by colectomy as early as possible. Timing of the latter varies greatly. This study compared early (≤2 days) versus delayed (>2 days) sigmoid colectomy. METHODS: 2016-2019 NRD database was queried to identify patients aged ≥65 years admitted for sigmoid volvulus who underwent sequential endoscopic decompression and sigmoid colectomy. Outcomes included mortality, complications, hospital length of stay, readmissions, and hospital costs. RESULTS: 842 patients were included, of which 409 (48.6 â€‹%) underwent delayed sigmoid colectomy. Delayed sigmoid colectomy was associated with reduced cardiac complications (1.1 â€‹% vs 0.0 â€‹%, p â€‹= â€‹0.045), reduced ostomy rate (38.3 â€‹% vs 29.4 â€‹%, p â€‹= â€‹0.013), an increased overall length of stay (12 days vs 8 days, p â€‹< â€‹0.001) and increased overall costs (27,764 dollar vs. 24,472 dollar, p â€‹< â€‹0.001). CONCLUSION: In geriatric patient with sigmoid volvulus, delayed surgical resection after decompression is associated with reduced cardiac complications and reduced ostomy rate, while increasing overall hospital length of stay and costs.

Lost in transition: Impact of interhospital transfer on outcomes after emergency general surgery in the older adult population.

BACKGROUND: Emergency general surgery performed among patients over 65 years of age represents a particularly high-risk population. Although interhospital transfer has been linked to higher mortality in emergency general surgery patients, its impact on outcomes in the geriatric population remains uncertain. We aimed to establish the effect of interhospital transfer on postoperative outcomes in geriatric emergency general surgery patients. METHODS: Emergency general surgery patients 65 years and older were identified with American College of Surgeons National Surgical Quality Improvement Program 2013 to 2019. Patients were categorized based on admission source as either directly admitted or transferred from an outside hospital inpatient unit or emergency department. The primary outcomes evaluated were in-hospital mortality, 30-day mortality, and overall morbidity. Propensity score matching was used to control for confounders, including age, race, comorbidities, and preoperative conditions. Kaplan-Meier survival analysis and the log-rank test were used to compare 30-day survival in the matched cohort. RESULTS: Among the 88,424 patients identified, 13,872 (15.7%) were transfer patients. The median age was 74, and 53% were of female sex. Transfer patients had higher rates of comorbidities and preoperative conditions, including a higher prevalence of preoperative sepsis (21.8% vs 19.3%, P < .001) and ventilator dependence (6.4% vs 2.6%, P < .001). After propensity score-matched analysis, transferred patients exhibited higher rates of in-hospital mortality, 30-day mortality, and overall morbidity. Transfer patients were also less likely to be discharged home and more likely to be discharged to an acute care facility. Kaplan-Meier survival analysis confirmed a poorer 30-day survival in transferred patients. CONCLUSION: Interhospital transfer independently contributed to overall mortality and morbidity amongst geriatric emergency general surgery patients. Further investigation into improved coordination between hospitals, tailored care plans, and comprehensive risk assessments are needed to help mitigate the observed differences in outcomes.

The Not-So-Distant Future or Just Hype? Utilizing Machine Learning to Predict 30-Day Post-Operative Complications in Laparoscopic Colectomy Patients.

BACKGROUND: Complex machine learning (ML) models have revolutionized predictions in clinical care. However, for laparoscopic colectomy (LC), prediction of morbidity by ML has not been adequately analyzed nor compared against traditional logistic regression (LR) models. METHODS: All LC patients, between 2017 and 2019, in the National Surgical Quality Improvement Program (NSQIP) were identified. A composite outcome of 17 variables defined any post-operative morbidity. Seven of the most common complications were additionally analyzed. Three ML models (Random Forests, XGBoost, and L1-L2-RFE) were compared with LR. RESULTS: Random Forests, XGBoost, and L1-L2-RFE predicted 30-day post-operative morbidity with average area under the curve (AUC): .709, .712, and .712, respectively. LR predicted morbidity with AUC = .712. Septic shock was predicted with AUC ≤ .9, by ML and LR. CONCLUSION: There was negligible difference in the predictive ability of ML and LR in post-LC morbidity prediction. Possibly, the computational power of ML cannot be realized in limited datasets.

Evaluating the impact of timing to rib fixation in patients with traumatic brain injury: A nationwide analysis.

BACKGROUND: Early surgical stabilization of rib fractures (SSRF) is associated with improved inpatient outcomes in patients with multiple rib fractures. However, there is still a paucity of data examining the optimal timing of SSRF in patients with concomitant traumatic brain injury (TBI). This study aimed to assess whether earlier SSRF was associated with improved outcomes in patients with multiple rib fractures and TBI. METHODS: We performed a retrospective analysis of the American College of Surgeons Trauma Quality Improvement Program 2017-2020, including adult patients with TBI and multiple rib fractures who had undergone SSRF. The outcomes were post-procedural length of stay (LOS), hospital LOS, intensive care unit (ICU) LOS, in-hospital mortality, ventilator days, and tracheostomy rate. Multilevel mixed-effects regression analyses accounting for patient, injury, and hospital characteristics as well as institutional SSRF volume were used to assess the association between timing to SSRF and the outcomes of interest. As a sensitivity analysis, propensity-score matching was performed to compare patients who underwent early (<72 hours) versus late SSRF (≥72 hours). RESULTS: Of 1,041 patients included in this analysis, 430 (41.3%) underwent SSRF within the first 72 hours from admission. Delay to SSRF was associated with an increase in post-procedural LOS (partial regression coefficient (ß) = 0.011; p = 0.036; 95% confidence interval [CI], 0.001-0.023), longer hospital LOS (ß = 0.053; p < 0.001; 95% CI, 0.042-0.064), prolonged ICU LOS (ß = 0.032; p < 0.001; 95% CI, 0.025-0.038), and more ventilator days (ß = 0.026, p < 0.001; 95% CI, 0.020-0.032). CONCLUSION: In patients with concurrent multiple rib fractures and TBI, a delay in SSRF is associated with an increase in postprocedural LOS, hospital LOS, ICU LOS, and ventilator days. These findings suggest that the early patient selection and implementation of SSRF may play a beneficial role in patients presenting with concomitant TBI and multiple rib fractures. LEVEL OF EVIDENCE: Therapeutic/Care Management; Level IV.

Revisiting abdominal closure in mesenteric ischemia: is there an association with outcome?

PURPOSE: Current guidelines advocate liberal use of delayed abdominal closure in patients with acute mesenteric ischemia (AMI) undergoing laparotomy. Few studies have systematically examined this practice. The goal of this study was to evaluate the effect of delayed abdominal closure on postoperative morbidity and mortality in patients with AMI. METHODS: We performed a retrospective cohort study of the ACS-NSQIP 2013-2017 registry. We included patients with a diagnosis of AMI undergoing emergency laparotomy. Patients were divided into two groups based on the type of abdominal closure: (1) delayed fascial closure (DFC) when no layers of the abdominal wall were closed and (2) immediate fascial closure (IFC) if deep layers or all layers of the abdominal wall were closed. Propensity score matching was performed based on comorbidities, pre-operative, and operative characteristics. Univariable analysis was performed on the matched sample. RESULTS: The propensity-matched cohort consisted of 1520 patients equally divided into the DFC and IFC groups. The median (IQR) age was 68 (59-77), and 836 (55.0%) were female. Compared to IFC, the DFC group showed increased in-hospital mortality (38.9% vs. 31.6%, p = 0.002), 30-day mortality (42.4% vs. 36.3%, p = 0.012), and increased risk of respiratory failure (59.5% vs. 31.2%, p < 0.001). CONCLUSIONS: The delayed fascial closure technique was associated with increased mortality compared to immediate fascial closure. These findings do not support the blanket incorporation of delayed closure in mesenteric ischemia care or its previously advocated liberal use.

Low-molecular-weight heparin is superior to unfractionated heparin in lowering the risk of venous thromboembolism after traumatic lower extremity amputation.

BACKGROUND: Patients undergoing lower extremity amputation after trauma are at high risk of venous thromboembolism. Practice variations persist regarding the optimal pharmacologic agent for venous thromboembolism prophylaxis in this patient population. We aimed to compare the efficacy of unfractionated heparin versus low-molecular-weight heparin in preventing venous thromboembolism. METHODS: Using the 2013 to 2019 American College of Surgeons Pediatric Trauma Quality Improvement Program database, all trauma patients (≥18) who underwent lower limb amputation and received venous thromboembolism thromboprophylaxis in the form of unfractionated heparin or low-molecular-weight heparin were included. We excluded patients who died within 24 hours of admission or those who received no thromboprophylaxis. The primary outcome was the rate of venous thromboembolism. Multivariable logistic regression was used to evaluate the independent relationship between the type of pharmacologic prophylaxis and the risk of venous thromboembolism. RESULTS: A total of 4,103 patients who underwent lower extremity amputation were identified. Patients were primarily young (median age 43 years) with blunt injuries (83%). The overall rate of venous thromboembolism was 8.6%. Most (77%) patients received low-molecular-weight heparin-based prophylaxis. Compared with patients without venous thromboembolism, the venous thromboembolism cohort had a greater injury severity score (19 vs 13, P < .001), had more patients undergoing above-the-knee amputation (48% vs 36%, P < .001), and less frequently received low-molecular-weight heparin (64% vs 78%, P < .001). Multivariable analysis showed that low-molecular-weight heparin was associated with a significantly lower venous thromboembolism rate than unfractionated heparin (odds ratio: 0.65 [0.51-0.83], P < .001). CONCLUSION: Thromboprophylaxis with low-molecular-weight heparin was found to be superior to unfractionated heparin in lowering the risk of venous thromboembolism among traumatic amputees and should be the preferred pharmacologic agent in this patient population prone to venous thromboembolism.

Complicated Abdominal Wall Hernias in the Elderly: Time Is Life and Comorbidities Matter.

BACKGROUND: Abdominal wall hernias represent a common problem that can present as surgical emergencies with increased morbidity and mortality. The data examining outcomes in elderly patients with hernia emergencies is scant. METHODS: The 2007-2017 ACS-NSQIP database was queried. Patients ≥65 years old with a diagnosis of acute complicated abdominal wall hernia were included. Univariable and multivariable analyses were used to identify independent predictors of 30-day mortality and surgical site infection (SSI). RESULTS: Main predictors of 30-day mortality were admission from nursing home or chronic care facility (OR = 1.62, 95% CI: 1.10-2.38, P = .014), transfer from outside ED (OR = 1.81, 95% CI: 1.31-2.51, P < .001), days from admission to operation (OR = 1.05, 95% CI: 1.02-1.08, P = .002), recent significant weight loss (OR = 1.95, 95% CI: 1.12-3.37, P = .018), pre-operative septic shock (OR = 4.13, 95% CI: 2.44-6.99, P < .001), ventilator dependence (OR = 2.50, 95% CI: 1.29-4.81, P = .006), and ASA status. When compared to open repair, laparoscopic repair emerged as protective against SSI (OR = .34, 95% CI: .17-.66, P = .001). Bowel resection (OR = 2.15, 95% CI: 1.63-2.84, P < .001) and increasing wound class were risk factors for SSI. CONCLUSION: In the elderly patient presenting with an acute complicated abdominal wall hernia, time to surgery is crucial for survival, and comorbidities influence outcome. Laparoscopy is an option in management due to its decreased risk of surgical site infection without increased mortality, whenever patient factors are favorable for this approach.

Timing and choice of systemic anticoagulation in the setting of extremity arterial injury repair.

PURPOSE: The role of perioperative anticoagulation in the setting of peripheral arterial injury remains unclear. We hypothesized that early initiation of anticoagulation is associated with a reduced amputation rate without increasing bleeding complications. METHODS: Using the 2016-2019 ACS-TQIP database, adult patients with upper and lower extremity vascular injuries who underwent open arterial repair and received anticoagulation were included. Patients were divided into two groups: (1) early venous thromboembolism prophylaxis (≤ 24 h) and (2) late prophylaxis (> 24 h) following arterial repair. The primary outcomes were the rates of limb amputation and bleeding complications. Multivariable logistic regression was used to estimate the impact of timing and type of anticoagulation on the rates of limb amputation and bleeding complications. RESULTS: 4379 patients were included, and 83.9% were males. 68.1% of patients received early anticoagulation, whereas 31.9% received late thromboprophylaxis. Low-molecular-weight heparin (LMWH) was used in 62.0% of patients, and unfractionated heparin (UFH) was administered in 34.3% of patients. Multivariable analysis showed that late initiation of thromboprophylaxis (OR = 1.69 [1.16-2.45], p = 0.006) and use of UFH (OR = 2.61 [1.80-3.79], p < 0.001) were associated with increased rate of amputation. Early initiation of anticoagulation (OR = 2.16 [1.63-2.85], p < 0.001) was associated with increased risk of bleeding complications requiring blood transfusions. Similarly, the use of UFH was associated with a higher rate of bleeding events compared to LWMH (OR = 2.61, [1.80-3.79], p < 0.001). CONCLUSION: Patients with the operative repair of arterial injuries receiving early perioperative anticoagulation demonstrated an improved limb salvage outcome than those who received late thromboprophylaxis. Our data also suggest that early initiation of prophylaxis may be associated with increased bleeding risk, which may be attenuated using LMWH compared to UFH.

Bowel Ischemia in COVID-19 Infection: One-Year Surgical Experience.

BACKGROUND: COVID-19 is a deadly multisystemic disease, and bowel ischemia, the most consequential gastrointestinal manifestation, remains poorly described. Our goal is to describe our institution's surgical experience with management of bowel ischemia due to COVID-19 infection over a one-year period. METHODS: All patients admitted to our institution between March 2020 and March 2021 for treatment of COVID-19 infection and who underwent exploratory laparotomy with intra-operative confirmation of bowel ischemia were included. Data from the medical records were analyzed. RESULTS: Twenty patients were included. Eighty percent had a new or increasing vasopressor requirement, 70% had abdominal distension, and 50% had increased gastric residuals. Intra-operatively, ischemia affected the large bowel in 80% of cases, the small bowel in 60%, and both in 40%. Sixty five percent had an initial damage control laparotomy. Most of the resected bowel specimens had a characteristic appearance at the time of surgery, with a yellow discoloration, small areas of antimesenteric necrosis, and very sharp borders. Histologically, the bowel specimens frequently have fibrin thrombi in the small submucosal and mucosal blood vessels in areas of mucosal necrosis. Overall mortality in this cohort was 33%. Forty percent of patients had a thromboembolic complication overall with 88% of these developing a thromboembolic phenomenon despite being on prophylactic pre-operative anticoagulation. CONCLUSION: Bowel ischemia is a potentially lethal complication of COVID-19 infection with typical gross and histologic characteristics. Suspicious clinical features that should trigger surgical evaluation include a new or increasing vasopressor requirement, abdominal distension, and intolerance of gastric feeds.