Gunshot-related lower extremity nerve injuries.

OBJECTIVE: The purpose of this study was to describe the frequency of nerve injury associated with lower extremity ballistic trauma, the associated skeletal and soft tissue injuries, and the rate of neurologic recovery. DESIGN AND SETTING: A retrospective review of an institutional trauma database was completed at a single level 1 trauma academic medical center. PATIENTS: This was an institutional review board approved retrospective cohort study of patients over 16 years of age presenting with ballistic-related traumatic injury to the lower extremities between May 2018 and May 2019. All patients identified with lower extremity ballistic trauma were included in this study. The rate of nerve palsy, associated skeletal injury, and operative fixation were recorded for each anatomic zone. Rates of associated concomitant vascular injury, fracture, and compartment syndrome were collected through a review of the electronic medical records. Chart review was performed to evaluate outcomes and nerve recovery. RESULTS: Twenty-one patients (21 extremities, 21/148, 14%) were diagnosed by attending physicians, fellowship-trained in orthopedic trauma, as having ballistic-related nerve injuries. Seventy-three percent of patients with a documented neurologic injury (11/15) demonstrated complete nerve recovery as measured by the MRC and sensory scale assessment at most recent follow-up, while the rest demonstrated no improvement in their neurologic deficits from presentation. The rate of associated vascular injury in patients with lower extremity nerve palsies was 38% (8/21). While the rate of vascular injury in the absence of neurologic injury was 3% (4/127). CONCLUSIONS: This series of lower extremity nerve injuries in a large sample of urban lower extremity ballistic trauma noted a high rate of concomitant nerve injuries. An associated diagnosis of a vascular injury appears to portend a higher risk of neurologic injury. Treating surgeons should have a high index of suspicion for associated vascular injury in patients presenting with a ballistic lower extremity nerve palsy.

Low-velocity, civilian firearm extremity injuries-review and update for radiologists.

Firearm injuries are a preventable epidemic in the USA. Extremities are commonly affected in gunshot injuries. Such injuries may be complex with concomitant osseous, soft tissue, and neurovascular components. The maximum wounding potential of a projectile is determined by its kinetic energy and the proportion of the kinetic energy that is transmitted to the target. Accurate assessment of ballistic injuries is dependent on utilizing the principles of wound ballistics, accurate bullet count, and ballistic trajectory analysis. The goals of this article are to review wound ballistics and the imaging evaluation of extremity civilian firearm injuries in the adult population, with emphasis on ballistic trajectory analysis, specific ballistic fracture patterns, and diffuse, secondary soft tissue ballistic injuries.

Injury and treatment patterns of ballistic pelvic fractures by anatomic location.

INTRODUCTION: Pelvic ballistic injuries threaten critical gastrointestinal, vascular, and urinary structures. We report the treatment patterns and injury profiles of ballistic pelvic fractures and the association between location of ballistic fractures of the pelvis and visceral injuries. METHODS: A prospectively collected database at an academic level I trauma center was reviewed for clinical and radiographic data on patients who sustained one or more ballistic fractures of the pelvis. Main outcomes compared included: procedures with orthopedic surgery, emergent surgery, concomitant intrapelvic injuries, and mortality. RESULTS: Eighty-six patients were included. Eight patients (9.3%) underwent surgical debridement with orthopedic surgery, no ballistic pelvic fractures required surgical stabilization. The anatomical locations of ballistic pelvic fractures included: 10 (14.7%) anterior ring, 13 (19.1%) posterior ring, 27 (39.7%) anterior column, and 18 (20.9%) posterior column. There was a statistically significant association between anterior ring and rectal injury. The association between anterior ring injury and bladder injury approached significance. CONCLUSIONS: This case series included 86 patients with a ballistic fracture of the pelvis, none requiring pelvic ring surgical stabilization. The unpatterned behavior of these injuries demands a high suspicion for visceral injury, with special attention to the rectum and bladder in the setting of anterior ring involvement. LEVEL OF EVIDENCE: IV.

Surgeon preferences regarding antibiotic prophylaxis for ballistic fractures.

BACKGROUND: Scant evidence exists to support antibiotic use for low velocity ballistic fractures (LVBF). We therefore sought to define current practice patterns. We hypothesized that most surgeons prescribe antibiotics for LVBF, prescribing is not driven by institutional protocols, and that decisions are based on protocols utilized for blunt trauma. MATERIALS AND METHODS: A web-based questionnaire was emailed to the membership of the Orthopaedic Trauma Association (OTA). The questionnaire included demographic information and questions about LVBF treatment practices. Two hundred and twenty surgeons responded. One hundred and fifty-four (70 %) respondents worked at a Level-1 trauma center, 176 (80 %) had received fellowship education in orthopaedic trauma and 104 (47 %) treated at least 10 ballistic fractures annually. Responses were analyzed with SAS 9.3 for Windows (SAS Institute Inc, Cary, NC). RESULTS: One hundred eighty-six respondents (86 %) routinely provide antibiotics for LVBF. Those who did not were more apt to do so for intra-articular fractures (8/16, 50 %) and pelvic fractures with visceral injury (10/16, 63 %). Most surgeons (167, 76 %) do not believe the Gustilo-Anderson classification applies to ballistic fractures, and (20/29, 70 %) do not base their antibiotic choice on the classification system. Few institutions (58, 26 %) have protocols guiding antibiotic use for LVBF. CONCLUSIONS: Routine antibiotic use for LVBF is common; however, practice is not dictated by institutional protocol. Although antibiotic use generally follows current blunt trauma guidelines, surgeons do not base their treatment decisions the Gustilo-Anderson classification. Given the high rate of antibiotic use for LVBF, further study should focus on providing evidence-based treatment guidelines.

Socioeconomic status is associated with greater hazard of post-discharge mortality than race, gender, and ballistic injury mechanism in a young, healthy, orthopedic trauma population.

OBJECTIVES: To explore the utility of legacy demographic factors and ballistic injury mechanism relative to popular markers of socioeconomic status as prognostic indicators of 10-year mortality following hospital discharge in a young, healthy patient population with isolated orthopedic trauma injuries. METHODS: A retrospective cohort study was performed to evaluate patients treated at an urban Level I trauma center from January 1, 2003, through December 31, 2016. Current Procedure Terminology (CPT) codes were used to identify upper and lower extremity fracture patients undergoing operative fixation. Exclusion criteria were selected to yield a patient population of isolated extremity trauma in young, otherwise healthy individuals between the ages of 18 and 65 years. Variables collected included injury mechanism, age, race, gender, behavior risk factors, Area Deprivation Index (ADI), and insurance status. The primary outcome was post-discharge mortality, occurring at any point during the study period. RESULTS: We identified 2539 patients with operatively treated isolated extremity fractures. The lowest two quartiles of socioeconomic status (SES) were associated with higher hazard of mortality than the highest SES quartile in multivariable analysis (Quartile 3 HR: 2.2, 95% CI: 1.2-4.1, p = 0.01; Quartile 4 HR: 2.2, 95% CI: 1.1-4.3, p = 0.02). Not having private insurance was associated with higher mortality hazard in multivariable analysis (HR 2.0, 95% CI: 1.3-3.2, p = 0.002). The presence of any behavioral risk factor was associated with higher mortality hazard in univariable analysis (HR: 1.8, p < 0.05), but this difference did not reach statistical significance in multivariable analysis (HR: 1.4, 95%: 0.8-2.3, p = 0.20). Injury mechanism (ballistic versus blunt), gender, and race were not associated with increased hazard of mortality (p > 0.20). CONCLUSION: Low SES is associated with a greater hazard of long-term mortality than ballistic injury mechanism, race, gender, and medically diagnosable behavioral risk factors in a young, healthy orthopedic trauma population with isolated extremity injury.

Radial nerve transection after ballistic humeral shaft fractures: A retrospective cohort study.

INTRODUCTION: Radial nerve palsy following fracture of the humeral shaft is common. However, the incidence of nerve transection in the setting of ballistic trauma is unknown. The purpose of this study was to estimate the incidence of radial nerve transection after ballistic fracture of the humerus. METHODS: Patients presenting to an urban, level-1 trauma center with a ballistic fracture of the humeral shaft were retrospectively reviewed. Patient demographics, clinical exam on presentation, and operative data were reviewed to determine the incidence of radial nerve palsy on initial examination, the incidence of operative treatment, the incidence of how frequently the nerve was directly visualized, and the incidence of radial nerve transection. RESULTS: One-hundred and thirteen ballistic humeral shaft fractures were identified. Of these, 30 (26.5%) patients had a complete radial nerve palsy on exam. Of patients with a radial nerve palsy, on exam 20 were taken to the operating room and the nerve was visualized in 17 of those cases. There 2 were partially lacerated nerves and 12 nerves were completely transected. Thus, in patients with a complete nerve deficit on examination who underwent operative treatment with nerve exploration, the rate of nerve transection was 70.6%. The lower bound rate of nerve transection for all patients with radial nerve palsy (assuming all unexplored nerves were intact) was 40.0%. CONCLUSION: The rate of nerve transection in patients with humerus shaft fractures with associated radial nerve palsies is likely higher than the rate of nerve transection in similar injuries caused by blunt mechanisms. The authors recommend early exploration and fixation of these injuries.

Epidemiology of ballistic fractures in the United States: A 20-year analysis of the Firearm Injury Surveillance Study.

INTRODUCTION: Ballistic (i.e., gunshot-induced) fractures present unique treatment challenges and can be associated with high rates of complications and considerable morbidity. Large-scale epidemiologic data on these types of fractures are scarce. There is concern that gun-related violence may be on the rise, potentially increasing the burden of ballistic orthopaedic trauma, but there are few contemporary studies on the topic. The aim of this study, therefore, was to investigate the incidence and demographics of patients with ballistic fractures in the United States (US) over the last 20 years. MATERIALS AND METHODS: This descriptive epidemiology study retrospectively analyzed the Firearm Injury Surveillance Study to identify cases of ballistic fractures in the US from 2000 to 2019. Overall and annual numbers of fractures and fracture incidence rates (IRs), patient demographics, incident characteristics, and temporal trends were analyzed. Patients of all ages were included. Ballistic fractures were grouped by anatomic location for comparisons (non-spine axial, spine, upper extremity, lower extremity). RESULTS: An estimated N = 240,555 patients (n = 8,322 unweighted cases) sustained ballistic fractures over the 20-year study period for an overall IR of 39.2 per 1,000,000 person-years at-risk (PYR). Overall, lower extremity fractures accounted for the largest percentage of cases (45.9%; IR=18.8 PYR), followed by upper extremity fractures (32.8%; IR=13.4 PYR), non-spine axial fractures (16.1%; IR=6.6 PYR), and spine fractures (5.2%; IR=2.1 PYR). Diaphyseal femur fractures were the most common ballistic fractures overall. Nearly three-fourths (71.2%) of all cases occurred in males in the second through fourth decades. The most common injury intent was assault (71.8%) and a majority of patients (71.2%) required hospital admission. Accounting for population growth yielded a significantly increasing incidence of all ballistic fractures over the study period from 15.7 PYR in 2000 to 96.8 PYR in 2019 (average annual percent change=10.3, p < 0.00001). CONCLUSION: These data suggest that the nationwide burden of ballistic fractures in the US has increased significantly in the last two decades. Ballistic fractures are associated with significant morbidity and societal cost, and increasing injury rates highlight the need for future research aimed at better understanding the ideal treatment of these types of fractures and their outcomes.

Ballistic trauma patients have decreased early narcotic demand relative to blunt trauma patients: Blunt ballistic injury opioid use.

OBJECTIVES: Blunt and ballistic injuries are two common injury mechanisms encountered by orthopaedic traumatologists. However the intrinsic nature of these injures may necessitate differences in operative and post-operative care. Given the evolving opioid crisis in the medical community, considerable attention has been given to appropriate management of pain; particularly in orthopaedic patients. We sought to evaluate relative postoperative narcotic use in blunt injuries and ballistic injuries. DESIGN: Retrospective Cohort Study. SETTING: Academic Level-1 Trauma Center. PATIENTS: 96 Patients with blunt or ballistic fractures. INTERVENTION: Inpatient narcotic pain management after orthopaedic fracture management. MAIN OUTCOME MEASUREMENTS: Morphine equivalent units (MEU). RESULTS: Patients with blunt injuries had a higher MEU compared to ballistic injuries in the first 24 hours postoperatively (35.0 vs 29.5 MEU, p=0.02). There were no differences in opiate consumption 24-48 hours (34.8 vs 28.0 MEU), 48 hours - 7 days post op (28.4 vs 30.4 MEU) or the 24 hours before discharge (30.0 vs 28.6 MEU). On multivariate analysis, during the 24-48 hours and 24 hours before discharge timepoints total EBL was associated with increased opioid usage. During days 3-7 (p<0.001) and in the final 24 hours prior to discharge (p=0.012), the number of orthopaedic procedures was a predictor of opioid consumption. CONCLUSION: Blunt injuries required an increased postoperative narcotic consumption during the first 24 hours of inpatient stay following orthopedic fracture fixation. However, there was no difference at other time points. Immediate post-operative pain regimens may be decreased for patients with ballistic injuries. LEVEL OF EVIDENCE: III.

Disparities in follow-up care for ballistic and non-ballistic long bone lower extremity fractures.

OBJECTIVES: To describe differences in follow-up compliance and emergency department (ED) visits between ballistic and non-ballistic operative lower extremity fracture patients. DESIGN: Retrospective study. SETTING: Urban level 1 trauma center. PATIENTS/PARTICIPANTS: Patients age ≥18 years with ≥1 tibia or femur fractures treated with ORIF or intramedullary nailing (IMN) between September 1, 2013 and August 31, 2015. MAIN OUTCOME MEASURE: A compliance fraction calculated as ([number of attended follow-up visits] / [number of attended follow-up visits + number of missed follow-up visits]) and ED visits in the post-operative period. RESULTS: 612 patients were studied. Patients with ballistic lower extremity fractures had a younger mean age (30.8 years v. 41.6 years; p < 0.0001); a shorter length of stay (5.00 days v. 8.00 days; p < 0.0001); and were more likely to be male (92.6% v. 68%; p < 0.0001) and African-American (90.1% v. 63.1%; p < 0.0001) when compared to non-ballistic long bone injuries. Increased follow-up compliance (defined as a compliance fraction ≥0.75) was associated with having a non-ballistic fracture (OR 1.73, 1.13-2.64; p = 0.01), not having an ED visit (OR 2.08, 1.30-3.33; p = 0.002), and being female (OR 1.82, 1.27-2.61; p = 0.001). Increased ED utilization (≥ 1 ED visit) was associated with ballistic mechanism (OR 1.95, 1.20-3.16; p = 0.006), a low follow-up compliance fraction (OR 2.08, 1.30-3.33; p = 0.0019), homelessness (OR 3.91, 1.53-9.98; p = 0.006), and African-American race (OR 2.26, 1.26-4.05; p = 0.05). Scheduling a specific follow-up visit on the discharge summary did not predict higher compliance (OR 1.51, 0.98-2.33; p = 0.06). Conversely, the lack of a specific follow-up visit scheduled on the discharge summary did not predict ED utilization (OR 0.63, 0.34-1.17; p = 0.14). CONCLUSION: The results of this study demonstrate that increased utilization of the ED was associated with ballistic fractures, homelessness, decreased clinic compliance, and African American race. Furthermore, patients with non-ballistic injuries, women, and those without any ED visit were more likely to have higher outpatient clinic compliance.

Management of civilian ballistic fractures.

INTRODUCTION: The management of ballistic fractures, which are open fractures, has often been studied in wartime and has benefited from the principles of military surgery with debridement and lavage, and the use of external fixation for bone stabilization. HYPOTHESIS: In civilian practice, bone stabilization of these fractures is different and is not performed by external fixation. PATIENTS AND METHODS: Fifteen civilian ballistic fractures, Gustilo II or IIIa, two associated with nerve damage and none with vascular damage, were reviewed. After debridement and lavage, ten internal fixations and five conservative treatments were used. RESULTS: No superficial or deep surgical site infection was noted. Fourteen of the 15 fractures (93%) healed without reoperation. Eleven of the 15 patients (73%) regained normal function. DISCUSSION: Ballistic fractures have a bad reputation due to their many complications, including infections. In civilian practice, the use of internal fixation is not responsible for excessive morbidity, provided debridement and lavage are performed. Civilian ballistic fractures, when they are caused by low-velocity firearms, differ from military ballistic fractures. Although the principle of surgical debridement and lavage remains the same, bone stabilization is different and is similar to conventional open fractures.