Is Use of Warning Lights and Sirens Associated With Increased Risk of Ambulance Crashes? A Contemporary Analysis Using National EMS Information System (NEMSIS) Data.

STUDY OBJECTIVE: We compare reported crash rates for US ambulances responding to or transporting patients from a 911 emergency scene with or without lights and sirens. Our null hypothesis is that there will be no difference in the rate of ambulance crashes whether lights and sirens are used. METHODS: For this retrospective cohort study, we used the 2016 National EMS Information System data set to identify 911 scene responses and subsequent patient transports by transport-capable emergency medical services (EMS) units. We used the system's "response mode to scene" and "transport mode from scene" fields to determine lights and sirens use. We used the "type of response delay" and "type of transport delay" fields to identify responses and transports that were delayed because of a crash involving the ambulance. We calculated the rate of crash-related delays per 100,000 responses or transports and used multivariable logistic regression with clustered (by agency) standard errors to calculate adjusted odds ratios (AORs) (with 95% confidence intervals [CIs]) for the association between crash-related delays and lights and sirens use for responses and transports separately. RESULTS: Among 19 million included 911 scene responses, the response phase crash rate was 4.6 of 100,000 without lights and sirens and 5.4 of 100,000 with lights and sirens (AOR 1.5; 95% CI 1.2 to 1.9). For the transport phase, the crash rate was 7.0 of 100,000 without lights and sirens and 17.1 of 100,000 with lights and sirens (AOR 2.9; 95% CI 2.2 to 3.9). Excluding responses and transports with only partial lights and sirens use did not meaningfully alter the results (response AOR 1.5, 95% CI 1.2 to 1.9; transport AOR 2.8, 95% CI 2.1 to 3.8). CONCLUSION: Ambulance use of lights and sirens is associated with increased risk of ambulance crashes. The association is greatest during the transport phase. EMS providers should weigh these risks against any potential time savings associated with lights and sirens use.

Effect of mobile phone proliferation on crash notification times and fatality rates.

INTRODUCTION: The purpose of this study was to evaluate whether increased proliferation of mobile telephones has been associated with decreased MVC notification times and/or decreased MVC fatality rates in the United States (US). METHODS: We used World Bank annual mobile phone market penetration data and US Fatality Analysis Reporting System (FARS) fatal MVC data for 1994-2014. For each year, phone proliferation was measured as mobile phones per 100 population. FARS data were used to calculate MVC notification time (time EMS notified - time MVC occurred) in minutes, and to determine the MVC fatality rate per billion vehicle miles traveled (BVMT). We used basic vector auto-regression modeling to explore relationships between changes in phone proliferation and subsequent changes in median and 90th percentile MVC notification times, as well as MVC fatality rates. RESULTS: From 1994 to 2014, larger year-over-year increases in phone proliferation were associated with larger decreases in 90th percentile notification times for MVCs occurring during daylight hours (p=0.004) and on the national highway system (p=0.046) two years subsequent, and crashes off the national highway system three years subsequent (p=0.023). There were no significant associations between changes in phone proliferation and subsequent changes in median crash notification times, nor with subsequent changes in MVC fatality rates. CONCLUSION: Between 1994 and 2014 increased mobile phone proliferation in the U.S. was associated with shorter 90th percentile EMS notification times for some subgroups of fatal MVCs, but not with decreases in median notification times or overall MVC fatality rates.

Prehospital endotracheal intubation vs extraglottic airway device in blunt trauma.

OBJECTIVE: The objective of the study is to compare outcomes in blunt trauma patients managed with prehospital insertion of an extraglottic airway device (EGD) vs endotracheal intubation (ETI). The null hypothesis was that there would be no difference in mortality for the 2 groups. METHODS: This is a retrospective study of blunt trauma patients with Glasgow Coma Scale score less than or equal to 8 transported by ground emergency medical services directly from the scene of injury to a single urban level 1 trauma center. Patients managed with only noninvasive airway techniques were excluded, leaving patients undergoing either EGD placement or ETI. Outcomes included in-emergency department (ED) traumatic arrest and hospital mortality. Multivariable logistic regression was used to control for the potential confounding effects of demographic and clinical variables. For all analyses, P < .05 was used to establish statistical significance. RESULTS: In bivariate analysis, patients managed with EGD were more likely than those managed with ETI to have an in-ED traumatic arrest (36.5% vs 17.1%; P = .005), but eventual hospital mortality did not significantly differ between the 2 groups (75.7% vs 67.1%; P = .228). After controlling for demographic and clinical characteristics, patients managed with EGD were no more likely than patients managed with ETI to experience traumatic arrest in the ED (adjusted odds ratio, 1.67; 95% confidence interval, 0.72-3.89), and there was also no difference in overall hospital mortality (adjusted odds ratio, 0.912; 95% confidence interval, 0.36-2.30). CONCLUSION: In this preliminary, retrospective analysis, we found no difference in overall survival among trauma patients managed with prehospital EGD and those managed with prehospital ETI.

The difficult airway in trauma: What you need to know.

ABSTRACT: Airway evaluation and management is generally the first priority for treatment of trauma patients from the prehospital setting throughout their hospital stay. Delay in recognition of an airway problem, or inability to oxygenate or ventilate due to an inadequate airway, will lead to rapid death. Therefore, all clinicians involved in the care of trauma patients should have adequate knowledge of current best practices for airway evaluation and management. In addition, trauma providers should develop and maintain the skills needed to perform various airway maneuvers to establish and maintain an adequate airway. While elective airway management has the luxury of time for thorough airway evaluation, the airway management in the trauma setting does not allow this same opportunity. For this reason, all trauma airways should be presumed to be a difficult airway and teams should prepare accordingly. This review will summarize the best practices for airway evaluation and management for trauma patients from the prehospital setting through the emergency department.

Temporal changes in the prehospital management of trauma patients: 2014-2021.

INTRODUCTION: Aggressive prehospital interventions (PHI) in trauma may not improve outcomes compared to prioritizing rapid transport. The aim of this study was to quantify temporal changes in the frequency of PHI performed by EMS. METHODS: Retrospective chart review of adult patients transported by EMS to our trauma center from January 1, 2014 to 12/31/2021. PHI were recorded and annual changes in their frequency were assessed via year-by-year trend analysis and multivariate regression. RESULTS: Between the first and last year of the study period, the frequency of thoracostomy (6% vs. 9%, p â€‹= â€‹0.001), TXA administration (0.3% vs. 33%, p â€‹< â€‹0.001), and whole blood administration (0% vs. 20%, p â€‹< â€‹0.001) increased. Advanced airway procedures (21% vs. 12%, p â€‹< â€‹0.001) and IV fluid administration (57% vs. 36%, p â€‹< â€‹0.001) decreased. ED mortality decreased from 8% to 5% (p â€‹= â€‹0.001) over the study period. On multivariate regression, no PHI were independently associated with increased or decreased ED mortality. CONCLUSION: PHI have changed significantly over the past eight years. However, no PHI were independently associated with increased or decreased ED mortality.

Racial and Ethnic Disparity in Prehospital Pain Management for Trauma Patients.

BACKGROUND: Although evidence suggests that racial and ethnic minority (REM) patients receive inadequate pain management in the acute care setting, it remains unclear whether these disparities also occur during the prehospital period. The aim of this study is to assess the impact of race and ethnicity on prehospital analgesic use by emergency medical services (EMS) in trauma patients. STUDY DESIGN: Retrospective chart review of adult trauma patients aged 18 to 89 years old transported by EMS to our American College of Surgeons-verified level 1 trauma center from 2014 to 2020. Patients who identified as Black, Asian, Native American, or Other for race and/or Hispanic or Latino or Unknown for ethnicity were considered REM. Patients who identified as White, non-Hispanic were considered White. Groups were compared in univariate and multivariate analysis. The primary outcome was prehospital analgesic administration. RESULTS: A total of 2,476 patients were transported by EMS (47% White and 53% REM). White patients were older on average (46 years vs 38 years; p < 0.001) and had higher rates of blunt trauma (76% vs 60%; p < 0.001). There were no differences in Injury Severity Score (21 vs 20; p = 0.22). Although REM patients reported higher subjective pain rating (7.2 vs 6.6; p = 0.002), they were less likely to get prehospital pain medication (24% vs 35%; p < 0.001), and that difference remained significant after controlling for baseline characteristics, transport method, pain rating, prehospital hypotension, and payor status (adjusted odds ratio [95% CI], 0.67 [0.47 to 0.96]; p = 0.03). CONCLUSIONS: Patients from racial and ethnic minority groups were less likely to receive prehospital pain medication after traumatic injury than White patients. Forms of conscious and unconscious bias contributing to this inequity need to be identified and addressed.

A multicenter investigation of the hemodynamic effects of induction agents for trauma rapid sequence intubation.

BACKGROUND: Several options exist for induction agents during rapid sequence intubation (RSI) in trauma patients, including etomidate, ketamine, and propofol. These drugs have reported variable hemodynamic effects (hypotension with propofol and sympathomimetic effects with ketamine) that could affect trauma resuscitations. The purpose of this study was to compare the hemodynamic effects of these three induction agents during emergency department RSI in adult trauma. We hypothesized that these drugs would display a differing hemodynamic profile during RSI. METHODS: We performed a retrospective (2014-2019), multicenter trial of adult (≥18 years) trauma patients admitted to eight ACS-verified Level I trauma centers who underwent emergency department RSI. Variables collected included systolic blood pressure (SBP) and pulse before and after RSI. The primary outcomes were change in heart rate and SBP before and after RSI. RESULTS: There were 2,092 patients who met criteria, 85% received etomidate (E), 8% ketamine (K), and 7% propofol (P). Before RSI, the ketamine group had a lower SBP (E, 135 vs. K, 125 vs. P, 135 mm Hg, p = 0.04) but there was no difference in pulse (E, 104 vs. K, 107 vs. P, 105 bpm, p = 0.45). After RSI, there were no differences in SBP (E, 135 vs. K, 130 vs. P, 133 mm Hg, p = 0.34) or pulse (E, 106 vs. K, 110 vs. P, 104 bpm, p = 0.08). There was no difference in the average change of SBP (E, 0.2 vs. K, 5.2 vs. P, -1.8 mm Hg, p = 0.4) or pulse (E, 1.7 vs. K, 3.5 bpm vs. P, -0.96, p = 0.24) during RSI. CONCLUSION: Contrary to our hypothesis, there was no difference in the hemodynamic effect for etomidate versus ketamine versus propofol during RSI in trauma patients. LEVEL OF EVIDENCE: Therapeutic, Level IV.