Venous thromboembolism after penetrating femoral and popliteal artery injuries: an opportunity for increased prevention

Background: Trauma patients with penetrating vascular injuries have a higher rate of venous thromboembolism (VTE). The objective of this study was to determine the risk of VTE formation in penetrating femoral and popliteal vascular injuries and the effects of endovascular management of these injuries. Methods: A retrospective study of Pennsylvania Trauma Outcome Study registry was conducted during a 5-year period (2013-2017). All adult patients with a penetrating mechanism with femoral/popliteal vascular injuries were studied. Primary outcome was incidence of VTE in patients with isolated arterial injuries versus combined arterial/venous injuries. Secondary endpoints were intensive care unit (ICU) length of stay (LOS), hospital LOS and mortality. Statistical comparisons were accomplished using Fisher\u27s exact tests, and parametric two-sample t-tests or non-parametric Wilcoxon rank-sum tests for categorical and continuous variables, respectively. Results: Of the 865 patients with penetrating extremity vascular injuries, 207 had femoral or popliteal artery injuries. Patients with isolated arterial injuries (n=131) had a significantly lower deep venous thrombosis (DVT) rate compared with those with concurrent venous injuries (n=76) (3.1% vs. 13.2%, p=0.008). There were 14 patients in the study who developed DVTs. Among the four patients with isolated femoral or popliteal arterial injuries who had developed DVTs, three had an open repair. Among patients with isolated arterial injuries, those with DVT spend significantly more time on the ventilator (median=2 vs. 0, p=0.0020) compared with patients without DVT. Patients with DVT also had longer stay in the hospital (median=17.5 vs. 8, p=0.0664) and in the ICU (median=3 vs. 1, p=0.0585). Conclusions: Risk of DVT exists in patients with penetrating isolated femoral and popliteal artery trauma. Open repair was associated with significantly higher DVT rates in isolated arterial injuries. Level of evidence: Level IV therapeutic care/management

Early VTE Prophylaxis in Severe Traumatic Brain Injury: A Propensity Score Weighted EAST Multi-Center Study

BACKGROUND: Patients with TBI are at high risk of venous thromboembolism events (VTE). We hypothesized that early chemical VTE prophylaxis initiation (≤24 hours of a stable head CT) in severe TBI would reduce VTE without increasing risk of intracranial hemorrhage expansion (ICHE). METHODS: A retrospective review of adult patients ≥18 years of age with isolated severe TBI (AIS ≥ 3) who were admitted to 24 level 1 and level 2 trauma centers from January 1, 2014 to December 31 2020 was conducted. Patients were divided into those who did not receive any VTE prophylaxis (NO VTEP), who received VTE prophylaxis ≤24 hours after stable head CT (VTEP ≤24) and who received VTE prophylaxis \u3e24 hours after stable head CT (VTEP\u3e24). Primary outcomes were VTE and ICHE. Covariate balancing propensity score weighting was utilized to balance demographic & clinical characteristics across three groups. Weighted univariate logistic regression models were estimated for VTE & ICHE with patient group as predictor of interest. RESULTS: Of 3,936 patients, 1,784 met inclusion criteria. Incidences of VTE was significantly higher in the VTEP\u3e24 group, with higher incidences of DVT in the group. Higher incidences of ICHE were observed in the VTEP≤24 and VTEP\u3e24 groups. After propensity score weighting, there was a higher risk of VTE in patients in VTEP \u3e24 compared to those in VTEP≤24 ( [OR] = 1.51; [95%CI] = 0.69-3.30; p = 0.307), however was not significant. Although, the No VTEP group had decreased odds of having ICHE compared to VTEP≤24 (OR = 0.75; 95%CI = 0.55-1.02, p = 0.070), the result was not statistically significant. CONCLUSIONS: In this large multi-center analysis, there were no significant differences in VTE based on timing of initiation of VTE prophylaxis. Patients who never received VTE prophylaxis had decreased odds of ICHE. Further evaluation of VTE prophylaxis in larger randomized studies will be necessary for definitive conclusions. LEVEL OF EVIDENCE: level III, Therapeutic Care Management

The impact of COVID-19 infection on outcomes after injury in a state trauma system.

BACKGROUND: The COVID-19 pandemic reshaped the health care system in 2020. COVID-19 infection has been associated with poor outcomes after orthopedic surgery and elective, general surgery, but the impact of COVID-19 on outcomes after trauma is unknown. METHODS: We conducted a retrospective cohort study of patients admitted to Pennsylvania trauma centers from March 21 to July 31, 2020. The exposure of interest was COVID-19 (COV+) and the primary outcome was inpatient mortality. Secondary outcomes were length of stay and complications. We compared demographic and injury characteristics between positive, negative, and not-tested patients. We used multivariable regression with coarsened exact matching to estimate the impact of COV+ on outcomes. RESULTS: Of 15,550 included patients, 8,170 (52.5%) were tested for COVID-19 and 219 (2.7%) were positive (COV+). Compared with COVID-19-negative (COV-) patients, COV+ patients were similar in terms of age and sex, but were less often white (53.5% vs. 74.7%, p \u3c 0.0001), and more often uninsured (10.1 vs. 5.6%, p = 0.002). Injury severity was similar, but firearm injuries accounted for 11.9% of COV+ patients versus 5.1% of COV- patients (p \u3c 0.001). Unadjusted mortality for COV+ was double that of COV- patients (9.1% vs. 4.7%, p \u3c 0.0001) and length of stay was longer (median, 5 vs. 4 days; p \u3c 0.001). Using coarsened exact matching, COV+ patients had an increased risk of death (odds ratio [OR], 6.05; 95% confidence interval [CI], 2.29-15.99), any complication (OR, 1.85; 95% CI, 1.08-3.16), and pulmonary complications (OR, 5.79; 95% CI, 2.02-16.54) compared with COV- patients. CONCLUSION: Patients with concomitant traumatic injury and COVID-19 infection have elevated risks of morbidity and mortality. Trauma centers must incorporate an understanding of these risks into patient and family counseling and resource allocation during this pandemic. LEVEL OF EVIDENCE: Level II, Prognostic Study

Early VTE Prophylaxis in Severe Traumatic Brain Injury: A Propensity Score Weighted EAST Multicenter Study

BACKGROUND: Patients with traumatic brain injury (TBI) are at high risk of venous thromboembolism events (VTE). We hypothesized that early chemical VTE prophylaxis initiation (≤24 hours of a stable head CT) in severe TBI would reduce VTE without increasing risk of intracranial hemorrhage expansion (ICHE). METHODS: A retrospective review of adult patients 18 years or older with isolated severe TBI (Abbreviated Injury Scale score, ≥ 3) who were admitted to 24 Level I and Level II trauma centers from January 1, 2014 to December 31 2020 was conducted. Patients were divided into those who did not receive any VTE prophylaxis (NO VTEP), who received VTE prophylaxis ≤24 hours after stable head CT (VTEP ≤24) and who received VTE prophylaxis \u3e24 hours after stable head CT (VTEP\u3e24). Primary outcomes were VTE and ICHE. Covariate balancing propensity score weighting was utilized to balance demographic and clinical characteristics across three groups. Weighted univariate logistic regression models were estimated for VTE and ICHE with patient group as predictor of interest. RESULTS: Of 3,936 patients, 1,784 met inclusion criteria. Incidences of VTE was significantly higher in the VTEP\u3e24 group, with higher incidences of DVT in the group. Higher incidences of ICHE were observed in the VTEP≤24 and VTEP\u3e24 groups. After propensity score weighting, there was a higher risk of VTE in patients in VTEP \u3e24 compared with those in VTEP≤24 (odds ratio, 1.51; 95% confidence interval, 0.69-3.30; p = 0.307), however was not significant. Although, the No VTEP group had decreased odds of having ICHE compared with VTEP≤24 (odds ratio, 0.75; 95% confidence interval, 0.55-1.02, p = 0.070), the result was not statistically significant. CONCLUSION: In this large multi-center analysis, there were no significant differences in VTE based on timing of initiation of VTE prophylaxis. Patients who never received VTE prophylaxis had decreased odds of ICHE. Further evaluation of VTE prophylaxis in larger randomized studies will be necessary for definitive conclusions. LEVEL OF EVIDENCE: Therapeutic Care Management; Level III

Outcomes after ultramassive transfusion in the modern era: An Eastern Association for the Surgery of Trauma multicenter study

BACKGROUND: Despite the widespread institution of modern massive transfusion protocols with balanced blood product ratios, survival for patients with traumatic hemorrhage receiving ultramassive transfusion (UMT) (defined as ≥20 U of packed red blood cells [RBCs]) in 24 hours) remains low and resource consumption remains high. Therefore, we aimed to identify factors associated with mortality in trauma patients receiving UMT in the modern resuscitation era. METHODS: An Eastern Association for the Surgery of Trauma multicenter retrospective study of 461 trauma patients from 17 trauma centers who received ≥20 U of RBCs in 24 hours was performed (2014-2019). Multivariable logistic regression and Classification and Regression Tree analysis were used to identify clinical characteristics associated with mortality. RESULTS: The 461 patients were young (median age, 35 years), male (82%), severely injured (median Injury Severity Score, 33), in shock (median shock index, 1.2; base excess, -9), and transfused a median of 29 U of RBCs, 22 U of fresh frozen plasma (FFP), and 24 U of platelets (PLT). Mortality was 46% at 24 hours and 65% at discharge. Transfusion of RBC/FFP ≥1.5:1 or RBC/PLT ≥1.5:1 was significantly associated with mortality, most pronounced for the 18% of patients who received both RBC/PLT and RBC/FFP ≥1.5:1 (odds ratios, 3.11 and 2.81 for mortality at 24 hours and discharge; both p < 0.01). Classification and Regression Tree identified that age older than 50 years, low initial Glasgow Coma Scale, thrombocytopenia, and resuscitative thoracotomy were associated with low likelihood of survival (14-26%), while absence of these factors was associated with the highest survival (71%). CONCLUSION: Despite modern massive transfusion protocols, one half of trauma patients receiving UMT are transfused with either RBC/FFP or RBC/PLT in unbalanced ratios ≥1.5:1, with increased associated mortality. Maintaining focus on balanced ratios during UMT is critical, and consideration of advanced age, poor initial mental status, thrombocytopenia, and resuscitative thoracotomy can aid in prognostication. LEVEL OF EVIDENCE: Prognostic, level III

Early VTE prophylaxis in severe traumatic brain injury: A propensity score weighted EAST multicenter study.

BACKGROUND: Patients with traumatic brain injury (TBI) are at high risk of venous thromboembolism events (VTE). We hypothesized that early chemical VTE prophylaxis initiation (≤24 hours of a stable head CT) in severe TBI would reduce VTE without increasing risk of intracranial hemorrhage expansion (ICHE). METHODS: A retrospective review of adult patients 18 years or older with isolated severe TBI (Abbreviated Injury Scale score, ≥ 3) who were admitted to 24 Level I and Level II trauma centers from January 1, 2014 to December 31 2020 was conducted. Patients were divided into those who did not receive any VTE prophylaxis (NO VTEP), who received VTE prophylaxis ≤24 hours after stable head CT (VTEP ≤24) and who received VTE prophylaxis \u3e24 hours after stable head CT (VTEP\u3e24). Primary outcomes were VTE and ICHE. Covariate balancing propensity score weighting was utilized to balance demographic and clinical characteristics across three groups. Weighted univariate logistic regression models were estimated for VTE and ICHE with patient group as predictor of interest. RESULTS: Of 3,936 patients, 1,784 met inclusion criteria. Incidences of VTE was significantly higher in the VTEP\u3e24 group, with higher incidences of DVT in the group. Higher incidences of ICHE were observed in the VTEP≤24 and VTEP\u3e24 groups. After propensity score weighting, there was a higher risk of VTE in patients in VTEP \u3e24 compared with those in VTEP≤24 (odds ratio, 1.51; 95% confidence interval, 0.69-3.30; p = 0.307), however was not significant. Although, the No VTEP group had decreased odds of having ICHE compared with VTEP≤24 (odds ratio, 0.75; 95% confidence interval, 0.55-1.02, p = 0.070), the result was not statistically significant. CONCLUSION: In this large multi-center analysis, there were no significant differences in VTE based on timing of initiation of VTE prophylaxis. Patients who never received VTE prophylaxis had decreased odds of ICHE. Further evaluation of VTE prophylaxis in larger randomized studies will be necessary for definitive conclusions. LEVEL OF EVIDENCE: Therapeutic Care Management; Level III