Vaginal pessary: a culprit for intraperitoneal bladder perforation.

Vaginal pessaries are widely considered to be a safe and effective non-surgical management option for women with pelvic organ prolapse. Complications may occur, and are more frequent with improper care and certain device designs and materials. It is imperative to provide information to patients about potential complications. We present the case of a woman in her 70s who presented to the Emergency Department with increasing groin and abdominal pain following a vaginal pessary insertion 2 days prior for grade 3 vaginal vault prolapse. On presentation, her abdomen was markedly distended with guarding. Laboratory investigations showed a significant acute kidney injury with a metabolic acidosis. An initial non-contrast CT showed fluid and inflammatory changes surrounding the bladder, and bladder perforation was suspected. A subsequent CT cystogram showed extravasation of contrast from the bladder into the peritoneal cavity, in keeping with an intraperitoneal bladder rupture. The patient underwent an emergency bladder repair in theatre.

Distinctive Pathology Associated With Focal Stenosis of the Main Pancreatic Duct Secondary to Remote Trauma: A Long-term Complication of Seat Belt Pancreatitis.

The radiologic finding of focal stenosis of the main pancreatic duct is highly suggestive of pancreatic cancer. Even in the absence of a mass lesion, focal duct stenosis can lead to surgical resection of the affected portion of the pancreas. We present four patients with distinctive pathology associated with non-neoplastic focal stenosis of the main pancreatic duct. The pathology included stenosis of the pancreatic duct accompanied by wavy, acellular, serpentine-like fibrosis, chronic inflammation with foreign body-type giant cell reaction, and calcifications. In all cases, the pancreas toward the tail of the gland had obstructive changes including acinar drop-out and interlobular and intralobular fibrosis. Three of the four patients had a remote history of major motor vehicle accidents associated with severe abdominal trauma. These results emphasize that blunt trauma can injure the pancreas and that this injury can result in long-term complications, including focal stenosis of the main pancreatic duct. Pathologists should be aware of the distinct pathology associated with remote trauma and, when the pathology is present, should elicit the appropriate clinical history.

Trauma to the solid abdominal organs: The missed dark box of colonoscopy.

Colonoscopy is an integral part of the lower bowel care and is generally considered a potentially safe diagnostic and therapeutic procedure performed as a daycare outpatient procedure. Colonoscopy is associated with different complications that are not limited to adverse events related to the bowel preparation solutions used, the sedatives used, but to the procedure related as well including bleeding and perforation. Injuries to the extra-luminal abdominal organs during colonoscopy are uncommon, however, serious complications related to the procedure have been reported infrequently in the literature. Life threatening injuries to the spleen, liver, pancreas, mesentery, and urinary bladder have been reported as early as in mid-1970s. These injuries should not be overlooked by clinicians and endoscopists. Steadily increasing abdominal pain, abdominal distension, and hemodynamic instability in absence of rectal bleeding should raise the possibility of severe organ injury. Splenic and hepatic injury following colonoscopy are usually serious and may be life threatening. Although conservative management may help, yet they usually need interventional radiology or surgical intervention. Acute pancreatitis following colonoscopy is usually mild and is mostly managed conservatively. The mechanism of abdominal organ injuries during colonoscopy is not fully understood, however many risk factors have been identified, which can be classified as- organ related, procedure related, and local abdominal factors. Difficult colonoscopy and prior intra-abdominal adhesions are probably the most relevant risk factors for these injuries. Left lateral position, avoidance of looping and excessive force during the procedure would probably reduce the risk of such injuries.

To the point: Utility of laparoscopy for operative management of stabbing abdominal trauma.

BACKGROUND: Algorithms for managing penetrating abdominal trauma are conflicting or vague regarding the role of laparoscopy. We hypothesized that laparoscopy is underutilized among hemodynamically stable patients with abdominal stab wounds. METHODS: Trauma Quality Improvement Program data (2016-2019) were used to identify stable (SBP ≥110 and GCS ≥13) patients ≥16yrs with stab wounds and an abdominal procedure within 24hr of admission. Patients with a non-abdominal AIS ≥3 or missing outcome information were excluded. Patients were analyzed based on index procedure approach: open, therapeutic laparoscopy (LAP), or LAP-conversion to open (LCO). Center, clinical characteristics and outcomes were compared according to surgical approach and abdominal AIS using non-parametric analysis. RESULTS: 5984 patients met inclusion criteria with 7 â€‹% and 8 â€‹% receiving therapeutic LAP and LCO, respectively. The conversion rate for patients initially treated with LAP was 54 â€‹%. Compared to conversion or open, therapeutic LAP patients had better outcomes including shorter ICU and hospital stays and less infection complications, but were younger and less injured. Assessing by abdominal AIS eliminated ISS differences, meanwhile LAP patients still had shorter hospital stays. At time of admission, 45 â€‹% of open patients met criteria for initial LAP opportunity as indicated by comparable clinical presentation as therapeutic laparoscopy patients. CONCLUSIONS: In hemodynamically stable patients, laparoscopy remains infrequently utilized despite its increasing inclusion in current guidelines. Additional opportunity exists for therapeutic laparoscopy in trauma, which appears to be a viable alternative to open surgery for select injuries from abdominal stab wounds. LEVEL OF EVIDENCE: Prognostic and Epidemiological; Level IV.

Development and Validation of a Novel Hollow Viscus Injury Prediction Score for Abdominal Seatbelt Sign: A Pacific Coast Surgical Association Multicenter Study.

BACKGROUND: High-quality CT can exclude hollow viscus injury (HVI) in patients with abdominal seatbelt sign (SBS) but performs poorly at identifying HVI. Delay in diagnosis of HVI has significant consequences necessitating timely identification. STUDY DESIGN: This multicenter, prospective observational study conducted at 9 trauma centers between August 2020 and October 2021 included adult trauma patients with abdominal SBS who underwent abdominal CT before surgery. HVI was determined intraoperatively and physiologic, examination, laboratory, and imaging findings were collected. Least absolute shrinkage and selection operator- and probit regression-selected predictor variables and coefficients were used to assign integer points for the HVI score. Validation was performed by comparing the area under receiver operating curves (AUROC). RESULTS: Analysis included 473 in the development set and 203 in the validation set. The HVI score includes initial systolic blood pressure <110 mmHg, abdominal tenderness, guarding, and select abdominal CT findings. The derivation set has an AUROC of 0.96, and the validation set has an AUROC of 0.91. The HVI score ranges from 0 to 17 with score 0 to 5 having an HVI risk of 0.03% to 5.36%, 6 to 9 having a risk of 10.65% to 44.1%, and 10 to 17 having a risk of 58.59% to 99.72%. CONCLUSIONS: This multicenter study developed and validated a novel HVI score incorporating readily available physiologic, examination, and CT findings to risk stratify patients with an abdominal SBS. The HVI score can be used to guide decisions regarding management of a patient with an abdominal SBS and suspected HVI.

[Intra-abdominal vascular injuries after blunt abdominal trauma]. / Intraabdominelle Gefäßverletzungen nach stumpfem Bauchtrauma.

Vascular injuries and hemorrhaging are serious potential complications in the management of patients with blunt abdominal trauma. The treatment depends on the extent and localization and can range from surveillance to endovascular treatment up to open surgery. The keys to success include the focused assessment with sonography for trauma (FAST) management and timely decision making. Abdominal vascular trauma continues to be a difficult problem and open and endovascular techniques continue to evolve in order to address this complex disease process.

Iatrogenic ureteral injury during colorectal surgery has a significant impact on patient outcomes: a French multicentric retrospective cohort study.

AIM: The long-term urological sequelae after iatrogenic ureteral injury (IUI) during colorectal surgery are not clearly known. The aims of this work were to report the incidence of IUI and to analyse the long-term consequences of urological late complications and their impact on oncological results of IUI occurring during colorectal surgery through a French multicentric experience (GRECCAR group). METHOD: All the patients who presented with IUI during colorectal surgery between 2010 and 2019 were retrospectively included. Patients with ureteral involvement needing en bloc resection, delayed ureteral stricture or noncolorectal surgery were not considered. RESULTS: A total of 202 patients (93 men, mean age 63 ± 14 years) were identified in 29 centres, corresponding to 0.32% of colorectal surgeries (n = 63 562). Index colorectal surgery was mainly oncological (n = 130, 64%). IUI was diagnosed postoperatively in 112 patients (55%) after a mean delay of 11 ± 9 days. Intraoperative diagnosis of IUI was significantly associated with shorter length of stay (21 ± 22 days vs. 34 ± 22 days, p < 0.0001), lower rates of postoperative hydronephrosis (2% vs. 10%, p = 0.04), anastomotic complication (7% vs. 22.5%, p = 0.002) and thromboembolic event (0% vs. 6%, p = 0.02) than postoperative diagnosis of IUI. Delayed chemotherapy because of IUI was reported in 27% of patients. At the end of the follow-up [3 ± 2.6 years (1 month-13 years)], 72 patients presented with urological sequalae (36%). Six patients (3%) required a nephrectomy. CONCLUSION: IUI during colorectal surgery has few consequences for the patients if recognized early. Long-term urological sequelae can occur in a third of patients. IUI may affect oncological outcomes in colorectal surgery by delaying adjuvant chemotherapy, especially when the ureteral injury is not diagnosed peroperatively.

Outcomes of vascular trauma associated with an evolution in the use of endovascular management.

OBJECTIVE: The availability of endovascular techniques has led to a paradigm shift in the management of vascular injury. Although previous reports showed trends towards the increased use of catheter-based techniques, there have been no contemporary studies of practice patterns and how these approaches differ by anatomic distributions of injury. The objective of this study is to provide a temporal assessment of the use of endovascular techniques in the management of torso, junctional (subclavian, axillary, iliac), and extremity injury and to evaluate any association with survival and length of stay. METHODS: The American Association for the Surgery of Trauma (AAST) Prospective Observational Vascular Injury Treatment registry (PROOVIT) is the only large multicenter database focusing specifically on the management of vascular trauma. Patients in the AAST PROOVIT registry from 2013 to 2019 with arterial injuries were queried, and radial/ulnar, and tibial artery injuries were excluded. The primary aim was to evaluate the frequency in use of endovascular techniques over time and by body region. A secondary analysis evaluated the trends for junctional injuries and compared the mortality between those treated with open vs endovascular repair. RESULTS: Of the 3249 patients included, 76% were male, and overall treatment type was 42% nonoperative, 44% open, and 14% endovascular. Endovascular treatment increased an average of 2% per year from 2013 to 2019 (range, 17%-35%; R2 = .61). The use of endovascular techniques for junctional injuries increased by 5% per year (range, 33%-63%; R2 = .89). Endovascular treatment was more common for thoracic, abdominal, and cerebrovascular injuries, and least likely in upper and lower extremity injuries. Injury severity score was higher for patients receiving endovascular repair in every vascular bed except lower extremity. Endovascular repair was associated with significantly lower mortality than open repair for thoracic (5% vs 46%; P < .001) and abdominal injuries (15% vs 38%; P < .001). For junctional injuries, endovascular repair was associated with a non-statistically significant lower mortality (19% vs 29%; P = .099), despite higher injury severity score (25 vs 21; P = .003) compared with open repair. CONCLUSIONS: The reported use of endovascular techniques within the PROOVIT registry increased more than 10% over a 6-year period. This increase was associated with improved survival, especially for patients with junctional vascular injuries. Practices and training programs should account for these changes by providing access to endovascular technologies and instruction in the catheter-based skill sets to optimize outcomes in the future.

Injuries incurred from minimally invasive access for abdominal surgery.

BACKGROUND: Injuries during initial port placement in minimally invasive abdominal surgery are rare but can cause major morbidity. We aimed to characterize the incidence, consequence, and risk factors for injury occurring on initial port placement. METHODS: This is a retrospective review of a General Surgery quality collaborative database with supplementary input from the Morbidity and Mortality conference database at our institution between 6/25/2018 and 6/30/2022. Patient characteristics, operative details, and postoperative course were assessed. Cases with an injury on entry were compared to cases without an injury to identify risk factors for injury. RESULTS: 8844 minimally invasive cases were present between the two databases. Thirty-four injuries (0.38%) occurred during initial port placement. Seventy-one percent of injuries were bowel injuries (full or partial thickness) and the majority (79%) of injuries were recognized during the index operation. Median surgeon experience for the cases with an injury was 9 years (IQR 4.25-14.5) compared to 12 years of experience for all surgeons contributing to the database (p = 0.004). Previous laparotomy was also significantly correlated with the rate of injury on entry (p = 0.012). There was no significant difference in the rate of injury based on method of entry (cut-down: 19 (55.9%), optical entry without Veress: 10 (29.4%), Veress followed by optical entry: 5 (14.7%), p = 0.11). BMI > 30 kg/m2 (injury: 16/34 vs no injury: 2538/8844, p = 0.847) was not associated with an injury. Fifty-six percent (19/34) of patients with an injury on initial port placement required laparotomy at some point in their hospital course. CONCLUSIONS: Injuries are rare during initial port placement for minimally invasive abdominal surgery. In our database, history of a previous laparotomy was a significant risk factor for an injury and appears to be more consequential than commonly implicated factors such as technique, patient body habitus, or surgeon experience.

Open abdominal vacuum pack technique for the management of severe abdominal complications after cytoreductive surgery in ovarian cancer.

INTRODUCTION: The aim of this study was to evaluate the indications and management of grade III-IV postoperative complications in patients requiring vacuum-assisted open abdomen after debulking surgery for ovarian carcinomatosis. METHODS: Retrospective study of prospectively collected data from patients who underwent a cytoreductive surgery by laparotomy for an epithelial ovarian cancer that required postoperative management of an open abdomen. An abdominal vacuum-assisted wound closure (VAWC) was applied in cases of abdominal compartmental syndrome (ACS) or intra-abdominal hypertension, to prevent ACS. The fascia was closed with a suture or a biologic mesh. The primary aim was to achieve primary fascial closure. Secondary outcomes considered included complications of cytoreductive surgery (CRS) and open abdominal wounds (hernia, fistula). RESULTS: Two percent of patients who underwent CRS required VAWC during the study's patient inclusion period. VAWC indications included: (i) seven cases of gastro-intestinal perforation, (ii) three necrotic enterocolitis, (iii) two intestinal ischemia, (iv) three anastomotic leakages and (v) four intra-abdominal hemorrhages. VAWC was used to treat indications (i) to (iv) (which represented 73.7% of cases), to prevent compartmental syndrome. Primary fascia closure was achieved in 100% of cases, in four cases (21.0%) a biologic mesh was used. Median hospital stay was 65 days (range: 18-153). Four patients died during hospitalization, three of these within 30 days of VAWC completion. CONCLUSION: VAWC for managing open abdominal wounds is a reliable technique to treat surgical post-CRS complications in advanced ovarian cancer and reduces the early post-operative mortality in cases presenting with severe complications.

Acute abdominal aortic injury during posterior lumbar fusion surgery: A case report.

INTRODUCTION: Vascular injury is a serious complication during lumbar fusion surgery, leading to massive blood loss and life-threatening circulatory failure. In this study, we report on a patient with abdominal aorta injury at L2-L3 level during lumbar fusion surgery via posterior approach. Fortunately, our patient was successfully managed with prompt intervention. PATIENT CONCERNS: A 73-year-old female was admitted to our department of low back and bilateral leg pain with claudication for over 6 months. DIAGNOSIS: L2-S1 spinal canal stenosis, with abdominal aorta injury at the L2-L3 level during lumbar fusion surgery via a posterior approach. INTERVENTIONS: L2-S1 decompression and fusion via a posterior approach was employed for spinal canal stenosis. Transluminal angioplasty with stent placement was successfully performed to stop the bleeding. OUTCOMES: During the procedure, it was decided that staunching the active bleeding was necessary and attention should be paid to the vital signs and blood pressure. Vascular surgical intervention was immediately scheduled when the blood pressure dropped. After stent placement, hemodynamic parameters stabilized. CONCLUSION: In this case report we review the prevalent sites, predisposing risk factors, diagnosis, and treatment of acute abdominal aortic injury during posterior lumbar fusion surgery, in view of our case findings. Although the incidence of vascular injury during lumbar fusion surgery is low, it is often easily overlooked. Consequently, during surgery, physicians should always be alert to the risk of vascular injury and master its clinical characteristics. Once injury is suspected, active and effective measures should promptly be taken for diagnosis and treatment to avoid serious adverse consequences.

Excluding Hollow Viscus Injury for Abdominal Seat Belt Sign Using Computed Tomography.

Importance: Abdominal seat belt sign (SBS) has historically entailed admission and observation because of the diagnostic limitations of computed tomography (CT) imaging and high rates of hollow viscus injury (HVI). Recent single-institution, observational studies have questioned the utility of this practice. Objective: To evaluate whether a negative CT scan can safely predict the absence of HVI in the setting of an abdominal SBS. Design, Setting, and Participants: This prospective, observational cohort study was conducted in 9 level I trauma centers between August 2020 and October 2021 and included adult trauma patients with abdominal SBS. Exposures: Inclusion in the study required abdominal CT as part of the initial trauma evaluation and before any surgical intervention, if performed. Results of CT scans were considered positive if they revealed any of the following: abdominal wall soft tissue contusion, free fluid, bowel wall thickening, mesenteric stranding, mesenteric hematoma, bowel dilation, pneumatosis, or pneumoperitoneum. Main Outcomes and Measures: Presence of HVI diagnosed at the time of operative intervention. Results: A total of 754 patients with abdominal SBS had an HVI prevalence of 9.2% (n = 69), with only 1 patient with HVI (0.1%) having a negative CT (ie, none of the 8 a priori CT findings). On bivariate analysis comparing patients with and without HVI, there were significant associations between each of the individual CT scan findings and the presence of HVI. The strongest association was found with the presence of free fluid, with a more than 40-fold increase in the likelihood of HVI (odds ratio [OR], 42.68; 95% CI, 20.48-88.94; P < .001). The presence of free fluid also served as the most effective binary classifier for presence of HVI (area under the receiver operator characteristic curve [AUC], 0.87; 95% CI, 0.83-0.91). There was also an association between a negative CT scan and the absence of HVI (OR, 41.09; 95% CI, 9.01-727.69; P < .001; AUC, 0.68; 95% CI, 0.66-0.70). Conclusions and Relevance: The prevalence of HVI among patients with an abdominal SBS and negative findings on CT is extremely low, if not zero. The practice of admitting and observing all patients with abdominal SBS should be reconsidered when a high-quality CT scan is negative, which may lead to significant resource and cost savings.

Management of the open abdomen: A systematic review with meta-analysis and practice management guideline from the Eastern Association for the Surgery of Trauma.

BACKGROUND: Multiple techniques describe the management of the open abdomen (OA) and restoration of abdominal wall integrity after damage-control laparotomy (DCL). It is unclear which operative technique provides the best method of achieving primary myofascial closure at the index hospitalization. METHODS: A writing group from the Eastern Association for the Surgery of Trauma performed a systematic review and meta-analysis of the current literature regarding OA management strategies in the adult population after DCL. The group sought to understand if fascial traction techniques or techniques to reduce visceral edema improved the outcomes in these patients. The Grading of Recommendations Assessment, Development and Evaluation methodology was utilized, meta-analyses were performed, and an evidence profile was generated. RESULTS: Nineteen studies met inclusion criteria. Overall, the use of fascial traction techniques was associated with improved primary myofascial closure during the index admission (relative risk, 0.32) and fewer hernias (relative risk, 0.11.) The use of fascial traction techniques did not increase the risk of enterocutaneous fistula formation nor mortality. Techniques to reduce visceral edema may improve the rate of closure; however, these studies were very limited and suffered significant heterogeneity. CONCLUSION: We conditionally recommend the use of a fascial traction system over routine care when treating a patient with an OA after DCL. This recommendation is based on the benefit of improved primary myofascial closure without worsening mortality or enterocutaneous fistula formation. We are unable to make any recommendations regarding techniques to reduce visceral edema. LEVEL OF EVIDENCE: Systematic Review and Meta-Analysis; Level IV.

[Measures for preventing bile duct injuries during difficult cholecystectomies-Bail-out procedures]. / Maßnahmen zur Vermeidung von Gallengangsläsionen bei schwieriger Cholezystektomie ­ Bail-out-Prozeduren.

BACKGROUND: Cholecystectomies can sometimes be very complex operations, which place high demands on the surgeon. OBJECTIVE: Are there preoperative and intraoperative procedures available for reducing the risk of intraoperative bile duct injuries during a complex cholecystectomy? RESULTS: The complexity of the operation should be estimated preoperatively. Extended diagnostic examinations, preoperative biliary stenting and the performance of the operation by an experienced surgeon may help to reduce the operative risk. In high-risk patients, postponing the cholecystectomy may be indicated. The timely intraoperative recognition of the impossibility to perform a regular cholecystectomy is of decisive importance. In this situation, so-called bail-out procedures, such as fundus-down cholecystectomy or subtotal cholecystectomy are warranted. Conversion from laparoscopic to open surgery is not always necessary. CONCLUSION: Bail-out procedures are useful to reduce the risk of bile duct injuries during complex cholecystectomy and can enable a safe completion of the operation.

Post-Traumatic Arteriovenous Fistula of Left Renal Vessels: Case Report of a Silent Complication for 23 Years.

Abdominal trauma leads rarely to severe renal injury such as acquired arterioveinous fistula. Here, we present the case of a 46-year-old man with a history of suicide attempt by a gunshot in the abdomen. At that time, explorative laparotomy was unremarkable. He consulted 23 years later for chronic left lumbar pain and was diagnosed with an arterioveinous fistula of left renal vessels with a-10-cm aneurysm of the left renal artery. We performed a left nephrectomy and endovascular clamping was the best option to manage this giant aneurysm in a hostile abdomen.

Be careful of splenic rupture caused by hit by a pitch during a baseball game: a case report.

BACKGROUND: To the best of our knowledge, splenic rupture caused by hit by a pitch (HBP) has not been previously reported. We present a patient who underwent emergency laparotomy for splenic rupture after being HBP during a baseball game. CASE PRESENTATION: A 41-year-old male was HBP in the left abdomen during his first at-bat during a baseball game. During the operation, vascular injury of the splenic hilum and a deeply extending parenchymal injury were observed, and splenectomy was performed. Histologic findings were consistent with splenic rupture. CONCLUSIONS: The patient's postoperative course was uneventful. Although extremely rare, the possibility of intra-abdominal organ injury should be considered in batters who are hit in the abdomen by a pitched baseball, as illustrated by our patient.

Left diaphragmatic rupture in vehicle trauma: Report of surgical treatment and complications of two consecutive cases.

BACKGROUND AND AIMS: Diaphragmatic ruptures are associated with blunt abdominal or thoracic trauma and often occur in car and motorbike accident with a high energy impact. CASE PRESENTATION: We report two cases of patients victims of car and motorbike accidents that were referred to the Emergency Department of our Hospital in August and September 2017 for a politrauma. The patients were both diagnosed with a left diaphragmatic rupture with herniation of the stomach in the chest, and decomposed fractures of the ribs. One of the two patients reported a large abdominal wound with loss of substance in the site of the impact. Both patients underwent to open emergency surgery with primary repair of the phrenic rupture. The post-operative course was characterized by the occurrence of complications such as respiratory distress and emothorax for one of the patients. CONCLUSION: Traumatic rupture of the diaphragm can be associated to blunt or penetrating abdominal trauma in car and motorbike accident with a prevalence of the left-sided lesions. In patients with politrauma an associate rupture of the diaphragm should be always suspected especially in motor accident where high energy impact can generate a traumatic laceration of the respiratory muscle. The treatment of associate thoracic wall fractures to prevent weaning and respiratory distress in intubated patient should be discussed.

Injuries Sustained During Incarceration Among Prisoners.

BACKGROUND: The U.S. prison population has increased substantially in recent years, and violent injury is common among prisoners. We sought to describe injury patterns and other characteristics of prisoners who presented to a trauma center after injury. Because penetrating trauma from an improvised weapon (e.g., shank) is frequent, we also sought to compare characteristics and outcomes of prisoners and non-prisoners who sustained an anterior abdominal stab or shank wound (AASW). METHODS: We analyzed injured adult prisoners who presented to a Level 1 trauma center between February, 2011, and April, 2017. We described characteristics of the injured prisoners and their hospitalizations. We compared prisoners who sustained an AASW to a random sample of non-prisoners with the same mechanism of injury using the chi-square test, Student's t-test, and logistic and Poisson regression. RESULTS: Of 14,461 hospitalized injured adults, 299 (2.0%) were injured while incarcerated. 185 (62%) encounters involved interpersonal violence and 36 prisoners (12%) presented with self-inflicted injuries. 98 (33%) had a psychiatric disorder. Among 33 prisoners and 66 non-prisoners who sustained an AASW, prisoners were less likely to have undergone a laparotomy [14/33 (42%) vs 44/66 (67%); RR 0.64 (95% CI 0.41-0.98)] or sustained an injury requiring operative intervention [2/33 (6%) vs 23/66 (35%); RR 0.17 (95% CI 0.04-0.69)]. CONCLUSIONS: Many injured prisoners have psychiatric illness, are involved in interpersonal violence, or harm themselves. Among hospitalized patients, abdominal stab/shank wounds sustained in prison are less likely to result in significant injuries or operative intervention than similar wounds in non-prisoners.