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PURPOSE: Limited data exist on the characteristics, risk factors, and management of blunt trauma pelvic fractures causing genitourinary (GU) and lower gastrointestinal (GI) injury. We sought to determine these parameters and elucidate independent risk factors. METHODS: The National Trauma Data Bank for years 2010-2014 was queried for pelvic fractures by ICD-9-CM codes. Exclusion criteria included age ≤ 17 years, penetrating injury, or incomplete records. Patients were divided into three cohorts: pelvic fracture, pelvic fracture with GU injury, and pelvic fracture with GU and GI injury. Between-group comparisons were made using stratified analysis. Multivariable logistic regression was used to determine independent risk factors for concomitant GI injury. RESULTS: In total, 180,931 pelvic fractures were found, 3.3% had GU, and 0.15% had GU and GI injury. Most common mechanism was vehicular collision. Injury severity score, pelvic AIS, and mortality were higher with combined injury (p < 0.001), leading to longer hospital and ICU stays and ventilator days (p < 0.001) with more frequent discharges to acute rehabilitation (p < 0.01). Surgical management of concomitant injuries involved both urinary (62%) and rectal repairs (81%) or diversions (29% and 46%, respectively). Male gender (OR = 2.42), disruption of the pelvic circle (OR = 6.04), pubis fracture (OR = 2.07), innominate fracture (OR = 1.84), and SBP < 90 mmgh (OR = 1.59) were the strongest independent predictors of combined injury (p < 0.01). CONCLUSION: Pelvic fractures with lower GU and GI injury represent < 1% of pelvic fractures. They are associated with more severe injuries and increased hospital resource utilization. Strongest independent predictors are disruption of the pelvic circle, male gender, innominate fracture, and SBP < 90mm Hg.

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BACKGROUND: Renal trauma may be managed differently in tiered trauma systems and among those who requireinterfaculty transfer. OBJECTIVE: To evaluate the initial management of renal trauma, assess patterns of management based on hospital trauma level designation and interfacility transfer status, and analyze management trends over time. DESIGN, SETTING, AND PARTICIPANTS: Retrospective cohort study of renal trauma from the National Trauma Data Bank 2010-2015. INTERVENTION: Nephrectomy, angioembolization, or nonoperative management. OUTCOMES MEASUREMENTS AND STATISTICAL ANALYSIS: We used generalized estimating equations to compare odds of each management outcome in patients transferred and directly admitted to a level I center, versus those directly admitted to a non-level I center, adjusting for vital signs, injury, demographic, and facility characteristics. We also used generalized estimating equations to examine linear time trends in management outcome, adjusting for injury characteristics. RESULTS AND LIMITATIONS: A total of 51798 renal trauma records were included: 44 838 low-grade (American Association for the Surgery of Trauma I-III) and 6359 high grade (IV-V) injuries. After adjusting for comorbidities, demographics, and hospital characteristics, odds of nephrectomy, angioembolization, and nonoperative management were similar in patients transferred or directly admitted to a level I center compared with those treated at a non-level I center. Changes in management over time demonstrated a decreased rate of nephrectomy (p=0.007) in high-grade injuries, while the rate of angioembolization remained constant (p=0.33). Study limitations include mortality prior to hospital transfer or arrival, and its retrospective nature. CONCLUSIONS: In this contemporary trauma analysis, outcomes of both low- and high-grade renal trauma are similar across patients managed in tiered trauma centers and those undergoing transfer, signifying dissemination of collective renal trauma management. The rate of nephrectomy has decreased for high-grade renal injury over our study period, suggesting new adoption of kidney-sparing management. PATIENT SUMMARY: Renal trauma is now managed similarly in tiered trauma centers and in patients requiring interfacility transfer. The rate of nephrectomy for high-grade renal injuries has decreased over time.

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BACKGROUND: Limited data exist on risk factors for the failure of nonoperative management of renal trauma. Our study objective was to determine the incidence, salvage procedure, and risk factors for failure of nonoperative management of renal trauma. METHODS: The National Trauma Data Bank research data sets for admission years 2010-2014 were queried for renal injury by Abbreviated Injury Score code. Patients were stratified by interventional therapy (renal procedure code <24 hours from admission) and nonoperative management (no surgical renal procedure <24 hours). Abbreviated Injury Score was converted to American Association for the Surgery of Trauma renal injury grade. Demographics, patient and injury characteristics were compared between groups using stratified analysis. Multivariable logistic regression models were used to determine variables that were associated with failure of nonoperative management. RESULTS: A review of 3,977,634 cases revealed 19,572 renal injuries that met study criteria. A total of 16.6% were managed with interventional therapy, and 83.4% were managed nonoperatively, of which 2.7% failed nonoperative management. Risk-adjusted multivariate regression indicated that penetrating injury (stab: odds ratio [OR], 1.61; 95% confidence interval [CI], 1.02-2.53 [p = 0.040]; and gunshot wound: OR, 1.40; 95% CI, 1.04-1.90 [p = 0.029]), highest abdominal injury grade for nonrenal organs (OR, 2.06; 95% CI, 1.65-2.57), and highest renal injury grade (OR, 1.85; 95% CI, 1.54-2.21) were associated with failure of nonoperative management (all p < 0.001). Increasing injury grades were associated with increasing risk of failing nonoperative management (Grade III: OR, 1.94; 95% CI, 1.35-2.90; Grade IV: OR, 9.79; 95% CI, 7.04-13.63; and Grade V: OR, 9.45; 95% CI, 6.02-14.86 [all p < 0.001]). CONCLUSIONS: Nonoperative management in the first 24 hours after fails in up to 2.7%. Renal injury grade, nonrenal abdominal injuries, and penetrating injuries predict for nonoperative management failure. Highest-grade renal injuries are at increased risk of failure. LEVEL OF EVIDENCE: Prognostic/epidemiologic study, level III; therapeutic study, level IV.

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PURPOSE: Motor vehicle collisions are the most common cause of blunt genitourinary trauma. We compared renal injuries with no protective device to those with seat belts and/or airbags using NTDB. Our primary end point was a decrease in high grade (grades III-V) renal injuries with a secondary end point of a nephrectomy rate reduction. MATERIALS AND METHODS: The NTDB research data sets for hospital admission years 2010, 2011 and 2012 were queried for motor vehicle collision occupants with renal injury. Subjects were stratified by protective device and airbag deployment. The AIS was converted to AAST renal injury grade and nephrectomy rates were evaluated. Intergroup comparisons were analyzed for renal injury grades, nephrectomy, length of stay and mortality using the chi-square test or 1-way ANOVA. The relative risk reduction of protective devices was determined. RESULTS: A review of 466,028 motor vehicle collisions revealed a total of 3,846 renal injuries. Injured occupants without a protective device had a higher rate of high grade renal injuries (45.1%) than those with seat belts (39.9%, p = 0.008), airbags (42.3%, p = 0.317) and seat belts plus airbags (34.7%, p <0.001). Seat belts (20.0%), airbags (10.5%) and seat belts plus airbags (13.3%, each p <0.001) decreased the nephrectomy rate compared to no protective device (56.2%). The combination of seatbelts and airbags also decreased total hospital length of stay (p <0.001) and intensive care unit days (p = 0.005). The relative risk reductions of high grade renal injuries (23.1%) and nephrectomy (39.9%) were highest for combined protective devices. CONCLUSIONS: Occupants of motor vehicle collisions with protective devices show decreased rates of high grade renal injury and nephrectomy. Reduction appears most pronounced with the combination of seat belts and airbags.

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