[Problems of expert assessment in gunshot injuries caused by shots from special weapon]. / Problemy ekspertnoi otsenki ognestrel'nykh povrezhdenii, prichinennykh vystrelami iz oruzhiya spetsial'nogo naznacheniya.

Forensic examination of a gunshot injury is the most difficult problem of domestic and foreign forensic medicine. A large amount of knowledge and practical observations on damage from standard samples of handguns has been accumulated. The emergence of new unique samples of special-purpose weapons requires forensic physicians and forensic experts to conduct a complex of morphological, spectral, forensic chemical, medico-forensic, radiological and other special laboratory studies of damage caused by such weapons. The article presents a case of forensic medical examination commission with the issue solution of differential diagnosis of causing a mortal fire wound injuries by a specific sample of special-purpose handgun.

National Trends and Cost Burden of Surgically Treated Gunshot Wounds in the US.

BACKGROUND: Gun violence remains a major burden on the US healthcare system, with annual cost exceeding $170 billion. Literature on the national trends in cost and survival of gun violence victims requiring operative interventions is lacking. STUDY DESIGN: All adults admitted with a diagnosis of gunshot wound requiring operative intervention were identified using the 2005-2016 National Inpatient Sample. The ICD Injury Severity Score, a validated prediction tool, was used to quantify the extent of traumatic injuries. Survey-weighted methodology was used to provide national estimates. Hospitalizations exceeding the 66th percentile of annual cost were considered as high-cost tertile. Multivariable logistic regressions with stepwise forward selection were used to identify factors associated with mortality and high-cost tertile. RESULTS: During the study period, 262,098 admissions met inclusion criteria with a significant increase in annual frequency and decrease in ICD Injury Severity Scores. A decline in mortality (8.6% to 7.6%; parametric test of trend = 0.03) was accompanied by increasing mean cost ($25,900 to $33,000; nonparametric test of trend < 0.001). After adjusting for patient and hospital characteristics, head and neck (adjusted odds ratio 31.2; 95% CI, 11.0 to 88.4; p < 0.001), vascular operations (adjusted odds ratio 24.5; 95% CI, 19.2 to 31.1; p < 0.001), and gastrointestinal (adjusted odds ratio 27.8; 95% CI, 17.2 to 44.8; p < 0.001) were independently associated with high-cost tertile designation compared with patients who did not undergo these operations. CONCLUSIONS: During the past decade, the increase in gun violence and severity has resulted in higher cost. Operations involving selected surgical treatments incurred higher in-hospital cost. Given the profound economic and social impact of surgically treated gunshot wounds, policy and public health efforts to reduce gun violence are imperative.

Lower extremity vascular injuries caused by firearms have a higher risk of amputation and death compared with non-firearm penetrating trauma.

OBJECTIVE: Firearm injuries have traditionally been associated with worse outcomes compared with other types of penetrating trauma. Lower extremity trauma with vascular injury is a common presentation at many centers. Our goal was to compare firearm and non-firearm lower extremity penetrating injuries requiring vascular repair. METHODS: We analyzed the National Inpatient Sample from 2010 to 2014 for all penetrating lower extremity injuries requiring vascular repair based on International Classification of Diseases, Ninth Revision codes. Our primary outcomes were in-hospital lower extremity amputation and death. RESULTS: We identified 19,494 patients with lower extremity penetrating injuries requiring vascular repair-15,727 (80.7%) firearm injuries and 3767 (19.3%) non-firearm injuries. The majority of patients were male (91%), and intent was most often assault/legal intervention (64.3%). In all penetrating injuries requiring vascular repair, the majority (72.9%) had an arterial injury and 43.8% had a venous injury. Location of vascular injury included iliac (19.3%), femoral-popliteal (60%), and tibial (13.2%) vascular segments. Interventions included direct vascular repair (52.1%), ligation (22.1%), bypass (19.4%), and endovascular procedures (3.6%). Patients with firearm injuries were more frequently younger, black, male, and on Medicaid, with lower household income, intent of assault or legal action, and two most severe injuries in the same body region (P < .0001 for all). Firearm injuries compared with non-firearm injuries were more often reported to be arterial (75.5% vs 61.9%), to involve iliac (20.6% vs 13.7%) and femoral-popliteal vessels (64.7% vs 39.9%), to undergo endovascular repair (4% vs 2.1%), and to have a bypass (22.5% vs 6.5%; P < .05 for all). Firearm-related in-hospital major amputation (3.3% vs 0.8%; P = .001) and mortality (7.6% vs 4.2%; P = .001) were higher compared with non-firearm penetrating trauma. Multivariable analysis showed that injury by a firearm source was independently associated with postoperative major amputation (odds ratio, 4.78; 95% confidence interval, 2.07-11.01; P < .0001) and mortality (odds ratio, 1.74; 95% confidence interval, 1.14-2.65; P = .01). CONCLUSIONS: Firearm injury is associated with a higher rate of amputation and mortality compared with non-firearm injuries of the lower extremity requiring vascular repair. These data can continue to guide public health discussions about morbidity and mortality from firearm injury.

Trends in Firearm Injuries Among Children and Teenagers in the United States.

BACKGROUND: Gun violence among children and teenagers in the United States occurs at a magnitude many times that of other industrialized countries. The trends of injury in this age group relative to the adult population are not well studied. This study seeks to measure trends in pediatric firearm injuries in the United States. METHODS: Data from the National Trauma Data Bank (2010-2016) were used in selecting patients evaluated for firearm injury. Patients were classified as children and teenagers (<20 y) or adults (≥20 y). Changes in the proportion of firearm injuries among children and teenagers relative to the overall population (pediatric component) were determined using trend analyses. RESULTS: There were 240,510 firearm injuries with children and teenagers accounting for 45,075 of these injuries (pediatric component of 18.7%). Pediatric firearm injury was mostly among males (87.4%), Blacks (60.7%), and victims of assault (76.0%). The pediatric component of firearm injuries decreased from 21.7% in 2010 to 18.2% in 2016 (P-trend < 0.001). Although there was a decrease from 22.7% to 17.6% in the pediatric component of assault (P-trend < 0.001), there was an increase from 8.7% to 10.1% in the pediatric component of self-inflicted injuries (P-trend = 0.028). Substratification by race/ethnicity showed decrease in the pediatric component of firearm injuries among all groups (P-trend < 0.001) except Whites (P-trend = 0.847). CONCLUSIONS: Despite reductions in the pediatric component of firearm injuries, there remains a significant burden of injury in this group. Continued public health efforts are necessary to ensure safety and reduce firearm injuries among children and teenagers in the United States.

The Effect of Opioid Dependence on Firearm Injury Treatment Outcomes: A Nationwide Analysis.

BACKGROUND: Both the opioid and gun violence epidemics are recurrent public health issues in the United States. We sought to determine the effect of opioid dependence on gunshot injury treatment outcomes. MATERIALS AND METHODS: Using the 2016 National Readmission Database, patients were included if they had a principal diagnosis of firearm injury. Opioid dependence was identified using appropriate International Classification of Diseases, 10th Revision, Clinical Modification codes. The primary outcome was 30-day all-cause readmission. Secondary outcomes were in-hospital and 1-year mortality, resource utilization, and most common reasons for admission and readmission. Confounders were adjusted for using multivariate regression analysis. RESULTS: A total of 31,303 patients were included, 695 of whom were opioid dependent. Opioid-dependent patients were more likely to be young (35.1 y, range: 33.4-36.7 y) and male (89.9%) compared with patients without opioid dependence. Opioid dependence was associated with higher 30-day readmission rates (adjusted odds ratio [aOR]: 1.67, 95% confidence interval [CI]: 1.12-2.50, P = 0.01). However, opioid dependence was associated with lower in-hospital (aOR: 0.16, CI: 0.07-0.38, P < 0.01) and 1-year (aOR: 0.15, CI: 0.06-0.38, P < 0.01) mortality, longer mean length of stay (adjusted mean difference [aMD]: 2.09 d, CI: 0.43-3.76, P = 0.03), and total hospitalization costs (aMD: $6,318, CI: $ 257-$12,380, P = 0.04). Both groups had similar total hospitalization charges (aMD: $$10,491, CI: -$12,618-$33,600, P-value = 0.37). CONCLUSIONS: Opioid dependence leads to higher rates of 30-day readmission and resource utilization among patients with firearm injuries. However, the in-hospital and 1-year mortality rates are lower among patients with opioid dependence secondary to lower injury acuity.

Current Burden of Gunshot Wound Injuries at Two Los Angeles County Level I Trauma Centers.

BACKGROUND: Gunshot wound (GSW) injuries present a unique surgical challenge. This study explored the financial and clinical burdens of GSW patients across 2 Los Angeles County Level I trauma centers over the last 12 years, and compared them with other forms of interpersonal injury (OIPI). STUDY DESIGN: This was a retrospective study of patients presenting as those with GSW and OIPI (defined as combined stab wound or blunt assault), between January 1, 2006 and March 30, 2018, at LAC+USC Medical Center (LAC+USC) and Harbor UCLA Medical Center (HUCLA). Demographic and clinical variables were assessed for GSW patients and compared with victims of OIPI. RESULTS: There were 17,871 patients who met inclusion criteria. There was a significant difference in mortality for patients with GSW vs OIPI (11% vs 2%, p < 0.001). The odds ratio for GSW patients requiring operation was twice as high as those suffering OIPI (odds ratio [OR] 2.0, 95% CI 1.8 to 2.2). The odds ratio for GSW patients requiring ICU admission was 20% higher than that for OIPI patients (OR 1.23, 95% CI 1.11 to 1.36). Gunshot wound patients experienced a longer median length of stay vs OIPI patients (3 days vs 2 days, p < 0.001). The median hospital charge per admission for GSW was twice that of OIPI (GSW $12,612 vs OIPI $6,195; p < 0.001). CONCLUSIONS: When compared with OIPI, GSW patients arrived more severely injured and required more operations, more ICU admissions, and longer hospital stays. Patients with GSW incurred significantly higher hospital charges and had a significantly higher mortality rate. Gunshot wound injury is a unique public health concern requiring comprehensive, nation-wide, contemporary study.

Gunshot Injuries to the Extremity: Is Immediate General Surgery Presence Needed?

Gunshot wounds (GSW) are becoming increasingly prevalent in urban settings. GSW to the trunk mandate full trauma activation and immediate surgeon response because of the high likelihood of operative intervention. Extremity GSW proximal to the knee/elbow also require full trauma activation based on American College of Surgeons Committee on trauma standards. However, whether isolated extremity GSW require frequent operative intervention is unclear. We evaluated GSW at our Level I trauma center from January 2012 to December 2016. Demographic data and injury patterns were abstracted from the trauma registry and charts. The number of GSW increased yearly but the age, gender, Injury Severity Score and injury pattern did not change (P = ns, not shown). There were 504 GSW that included an extremity and 194 (38%) involved multiple body regions. There were 310 GSW (62%) isolated to an extremity and 176 were proximal to the elbow/knee. If proximal GSW had an Emergency Department systolic blood pressure <90 mm Hg, 53 per cent underwent vascular repair, 12 per cent had soft tissue repair, and 29 per cent required no operation. If proximal GSW had an Emergency Department blood pressure >90 mm Hg, 57 per cent underwent orthopedic repair, 22 per cent required no surgery, and only 13 per cent required vascular repair (P < 0.01). In the absence of other criteria for full trauma activation such as shock, the need for the immediate presence of a general surgeon to perform emergency surgery for a GSW isolated to the extremity is low.

Sex Differences in Early Cardiovascular and All-Cause Hospitalization Outcomes After Surviving Firearm Injury.

The majority of the burden of firearm injury in the United States is on men as compared to women. There is limited evidence regarding sex differences in short-term hospitalization outcomes after surviving firearm injury. The risk of cardiovascular and all-cause hospital readmission, length of stay (LOS), and costs within 180 days after surviving an index firearm injury was compared between males and females. A claims-based, retrospective, cohort study was performed using Nationwide Readmission Database (2013-2014) to obtain a cohort of patients who survived an index hospitalization of firearm injury. The analysis was performed in August 2017. Cox proportional hazard regression models were used to estimate hazard ratio (HR) and 95% confidence intervals (95% CIs). Among 17,594 males and 2,289 females discharged alive after index firearm injury hospitalization, 14.4% and 13.2% were readmitted within 180 days. Within 180 days, the risk of cardiovascular readmission was 3.3 times greater among males versus females (HR = 3.34, 95% CI [1.18, 9.44]. Risk of all-cause readmission among males was greater at 90 days (HR = 1.40, 95% CI [1.04, 1.87]. Patients surviving a firearm injury have a substantial risk of subsequent hospitalizations. Cardiovascular readmissions are greater among males than females during the first 6 months after injury and may be indicative of a continuing long-term risk of health and patient outcomes that contributes to the overall burden of firearm injury.

Head injury assessment of non-lethal projectile impacts: A combined experimental/computational method.

The main objective of this study is to develop a methodology to assess this risk based on experimental tests versus numerical predictive head injury simulations. A total of 16 non-lethal projectiles (NLP) impacts were conducted with rigid force plate at three different ranges of impact velocity (120, 72 and 55m/s) and the force/deformation-time data were used for the validation of finite element (FE) NLP. A good accordance between experimental and simulation data were obtained during validation of FE NLP with high correlation value (>0.98) and peak force discrepancy of less than 3%. A state-of-the art finite element head model with enhanced brain and skull material laws and specific head injury criteria was used for numerical computation of NLP impacts. Frontal and lateral FE NLP impacts to the head model at different velocities were performed under LS-DYNA. It is the very first time that the lethality of NLP is assessed by axonal strain computation to predict diffuse axonal injury (DAI) in NLP impacts to head. In case of temporo-parietal impact the min-max risk of DAI is 0-86%. With a velocity above 99.2m/s there is greater than 50% risk of DAI for temporo-parietal impacts. All the medium- and high-velocity impacts are susceptible to skull fracture, with a percentage risk higher than 90%. This study provides tool for a realistic injury (DAI and skull fracture) assessment during NLP impacts to the human head.

The use of the anatomic 'zones' of the neck in the assessment of penetrating neck injury.

The traditional classification of neck injuries uses an anatomic description of Zones I through III. The objective of this article was to characterize the association between external wounds and the corresponding internal injuries after penetrating neck trauma to identify the clinical use of the anatomic zones of the neck. Patients who sustained penetrating neck trauma from December 2008 to March 2011 were analyzed. All patients underwent structured clinical examination documenting the external zone where the wound(s) were located. All internal injuries were then correlated with the external wounds. An internal injury was defined as "unexpected" if it was located outside the borders of the neck zone corresponding to the external wound. In total, 146 patients sustaining a penetrating neck injury were analyzed; 126 (86%) male. The mechanism of injury was stab wounds in 74 (51%) and gunshot wounds in 69 (47%). Mean age was 31 years (range, nine to 62 years). Thirty-seven (25%) patients sustained had a total of 50 internal injuries. There was a high incidence of noncorrelation between the location of the external injury and the internal structures that were damaged in patients with hard signs of vascular or aerodigestive injury. The use of the anatomic zones and their role in the workup of penetrating neck injury are questionable.

[The possibility of forensic medical assessment of the damage to clothes caused by a blank shots with the MP-79-9TM pistol].

The authors undertook an analysis of constructional features of standard blank and non-lethal cartridges for the MP-79-9TM pistol. The composition of gunshot products and the maximum distance over which they propagate have been determined. Special attention is given to the peculiarities of the damage caused to the target cloths (cotton and woolen) by blank rounds shot from different distances. A new chemical method was used for the first time to detect the particles of gunpowder on the victim's cloth; the possibility of its application for differential diagnostics of gunshot damages inflicted by blank and traumatic cartridges affected from different distances was estimated.

[The possibilities of forensic medical assessment of the wounds caused by discharges of 9 millimeter air rifles (pre-charge pneumatics)].

The data available from the forensic medical practice do not allow the comprehensive, objective, and reliable assessment of injuries to the human body and damages to the clothes inflicted by the shots from a 9 millimeter (.357) or higher-caliber pneumatic rifle equipped with the pre-charge pneumatic system. The use of bullets of specific structure and configuration for such weapons accounts for their marked influence on the morphological features and the extent of the resulting wounds. These peculiarities provide a basis for the objective differentiation between their injurious effects.

[The method for the qualitative assessment of certain characteristics of the bullet trajectory in case of the extremity gunshot wounds].

A method for the qualitative assessment of certain characteristics of the bullet trajectory in the case of a gunshot wound to an extremity is proposed to be used for the mathematical simulation of the mechanism of formation of such injuries.

Sturdivan's formula revisited: MRI assessment of anterior chest wall thickness for injury risk prediction of blunt ballistic impact trauma.

BACKGROUND: The thickness and composition of the chest wall are important quantities in multiparametric trauma models for the assessment of injury severity due to blunt ballistic chest impact. While ballistic parameters of non-penetrating projectiles can routinely be measured with high accuracy, data on the thickness of the anterior chest wall is unreliable. Therefore, it is the aim of this work to provide data on the thickness and composition of the anterior chest wall based on MRI examinations of healthy volunteers and to compare these measurements with different empirical estimation rules for the chest wall thickness. METHODS: The study encompassed consecutive male patients from an ongoing population-based cohort study. Each subject underwent standardized whole-body MRI (1.5Tesla). Thickness of total chest wall (CWT) and of adipose tissue (AT) were measured by two independent readers at ten anatomic locations on two cross-sectional planes over the centre of the left ventricle and over the tracheal bifurcation. For each subject, chest wall thickness was estimated based on ten different empirical estimation rules and percent errors were calculated. RESULTS: The study encompassed 250 male volunteers (average age 55.5 years, range 21-84 years, SD 13.6 years). Mean intraclass correlation coefficient of the two readers was 0.90 (range 0.59-1.0, SD 0.08). Average CWT was 31.2mm (range 17.3-51.6mm, SD 5.8mm) while average thickness of AT was 13.1mm (range 3.6-26.7mm, SD 4.6mm). Relative adiposity was 0.41 on average (range 0.19-0.61, SD 0.09). There was significant correlation between CWT and body weight and between CWT and body mass index. Sturdivan's approximation formula showed strong correlation with the measured values (percent error 3.58%, SD 16.26%). CONCLUSION: In this population, Sturdivan's equation formula which is based on the individual's body weight provides valid approximation values for the chest wall thickness and may be used for the optimal design of protective devices and personal body armor as well as for the development of anthropomorphic based test methodologies.

Missile injury to the pediatric brain in conflict zones.

OBJECT: This study was conducted both prospectively and retrospectively at one center over a period of 8 years. The population consisted of all patients with both an age 18 years or younger and a diagnosed penetrating missile injury (PMI) during the study interval. The authors analyzed factors determining outcome and demographic trends in this population, and they compared them with those in the more developed world. METHODS: Fifty-one patients were the victims of armed conflict, although no one was directly a party to any battle. This mechanism of injury is in strong opposition to data in the literature from developed countries, in which most missile injuries are the result of suicide or homicide or are even sports related. Moreover, all previous studies on the pediatric population have considered only injuries from gunshots, but authors of the current study have included injuries from other penetrating missiles as well. RESULTS: On cross tabulation analysis using the chi-square test, the factors shown to correlate with outcome included the Glasgow Coma Scale (GCS) score, pupillary abnormalities, patient age, hemodynamic status, and bihemispheric damage. On multinomial regression analysis, the two strongest predictors of death were GCS score and pupillary abnormalities. The GCS score and hemodynamic status were the strongest predictors of disability. CONCLUSIONS: There was no difference in the prognostic factors for PMI between developing or more developed countries. Glasgow Coma Scale score, pupillary abnormalities, and hemodynamic status were the strongest predictors of outcome. In conflict zones in developing countries the victims were mostly innocent bystanders, whereas in the more developed countries homicides and suicides were the leading etiological factors.

Imaging assessment of penetrating craniocerebral and spinal trauma.

Craniocerebral and spinal penetrating trauma, which may be either missile (most typically gun-related) or non-missile (most typically knife-related), is becoming an increasingly common presentation to the urban general and specialized radiology service in the UK. These injuries carry significant morbidity and mortality with a number of criteria for prognosis identifiable on cross-sectional imaging. Potential complications can also be pre-empted by awareness of certain neuroradiological features. Not all of these injuries are criminal in origin, however, a significant proportion will be, requiring, on occasion, provision of both ante-mortem and post-mortem radiological opinion to the criminal investigative procedure. This review aims to highlight certain imaging features of penetrating craniocerebral and spinal trauma including important prognostic, therapeutic, and forensic considerations.

[Factors affecting the morbidity and mortality of surgical management of vascular gunshot injuries: missed arterial injury and disregarded vein repair]. / Atesli silahla olusan vasküler yaralanmalarin cerrahisinde morbidite ve mortaliteyi etkileyen faktörler: Gözden kaçan arteryel yaralanma, ihmal edilmis ven tamiri.

BACKGROUND: The aim of this study was to establish the clinical course and importance of missed arterial injuries and disregarded venous repair after surgery for gunshot injuries. METHODS: This retrospective study was performed on the operative results of 275 shotgun vascular injury patients' presented to our clinic between January 1992 and December 2004. All patients were analyzed from their medical files and operative notes. The incidence of missed arterial injuries and ignored venous repair, localization and type of vascular complications, limb loss and mortality outcomes were documented. RESULTS: Seventy-five patients (27.27%) for a delayed diagnosis of a missed arterial injury and 91 patients (33.09%) for an ignored venous repair were treated. Complications of missed arterial injuries were determined as followings: false aneurysm n=43 (57.33%), arteriovenous fistula n=20 (26.66%), occlusion n=12 (16%). The missed vascular injury was most commonly observed in superficial femoral artery (n=20). The venous injury was present in 167 patients. Complications of disregarded venous repair were determined as venous edema and deep vein thrombosis. CONCLUSION: Missed arterial injuries and disregarded venous repairs during initial diagnosis or operation affect the morbidity and mortality in gunshot injury patients. After haemodynamic stabilization, gunshot patients should be evaluated by arteriography and venography to determine the anatomic localization of vascular injuries. All vascular continuity should be restored either by primary repair or by an autolog graft. All venous injuries located in popliteal and femoral area should be repaired.

"Awake" laparoscopy for the evaluation of equivocal penetrating abdominal wounds.

BACKGROUND: Diagnostic laparoscopy is useful for the assessment of equivocal penetrating abdominal wounds, and has become the modality of choice for the evaluation of such wounds at our institution. We hypothesised that, in appropriate patients, diagnostic "awake" laparoscopy (AL) could be performed under local anaesthesia in the emergency department (ED), allowing for expedited discharge and potential cost savings. METHODS: Selected haemodynamically stable patients with penetrating abdominal injury underwent AL. Suitability for AL was at the discretion of the attending surgeon. Identification of peritoneal penetration by AL led to exploratory laparotomy in the operating room. Patients with no evidence of peritoneal penetration were discharged from the ED (ALneg). These patients were matched to a cohort of 24 patients who underwent diagnostic laparoscopy in the OR which was negative for peritoneal penetration (DLneg). Length of stay and hospital charges were compared. RESULTS: Over a 30-month period, 15 patients underwent AL without complication. No peritoneal penetration was found in 11 patients. The remaining four patients underwent exploratory laparotomy, of which two were positive for intra-abdominal injury. Mean time to discharge was 7h in the ALneg group versus 18 h in the DLneg group (p=0.0003). Cost savings on hospital charges averaged 2227 US dollars per patient in the ALneg group compared with the DLneg group. CONCLUSIONS: AL may be safely performed in the ED, allowing for expedited patient discharge. Cost savings are achieved by the avoidance of charges inherent to diagnostic laparoscopy performed in the operating room.