Evaluation of critical care burden following traumatic injury from two randomized controlled trials.

Trauma resuscitation practices have continued to improve with new advances targeting prehospital interventions. The critical care burden associated with severely injured patients at risk of hemorrhage has been poorly characterized. We aim to describe the individual and additive effects of multiorgan failure (MOF) and nosocomial infection (NI) on delayed mortality and resource utilization. A secondary analysis of harmonized data from two large prehospital randomized controlled trials (Prehospital Air Medical Plasma (PAMPer) Trial and Study of Tranexamic Acid during Air and Ground Medical Prehospital Transport (STAAMP) Trial) was conducted. Only those patients who survived beyond the first 24 hours post-injury and spent at least one day in the ICU were included. Patients were stratified by development of MOF only, NI only, both, or neither and diagnosis of early (≤ 3 days) versus late MOF (> 3 days). Risk factors of NI and MOF, time course of these ICU complications, associated mortality, and hospital resource utilization were evaluated. Of the 869 patients who were enrolled in PAMPer and STAAMP and who met study criteria, 27.4% developed MOF only (n = 238), 10.9% developed NI only (n = 95), and 15.3% were diagnosed with both MOF and NI (n = 133). Patients developing NI and/or MOF compared to those who had an uncomplicated ICU course had greater injury severity, lower GCS, and greater shock indexes. Early MOF occurred in isolation, while late MOF more often followed NI. MOF was associated with 65% higher independent risk of 30-day mortality when adjusting for cofounders (OR 1.65; 95% CI 1.04-2.6; p = 0.03), however NI did not significantly affect odds of mortality. NI was individually associated with longer mechanical ventilation, ICU stay, hospital stay, and rehabilitation requirements, and the addition of MOF further increased the burden of inpatient and post-discharge care. MOF and NI remain common complications for those who survive traumatic injury. MOF is a robust independent predictor of mortality following injury in this cohort, and NI is associated with higher resource utilization. Timing of these ICU complications may reveal differences in pathophysiology and offer targets for continued advancements in treatment.

High Dimensional Multiomics Reveals Unique Characteristics of Early Plasma Administration in Polytrauma Patients With TBI.

OBJECTIVES: The authors sought to identify causal factors that explain the selective benefit of prehospital administration of thawed plasma (TP) in traumatic brain injury (TBI) patients using mediation analysis of a multiomic database. BACKGROUND: The Prehospital Air Medical Plasma (PAMPer) Trial showed that patients with TBI and a pronounced systemic response to injury [defined as endotype 2 (E2)], have a survival benefit from prehospital administration of TP. An interrogation of high dimensional proteomics, lipidomics and metabolomics previously demonstrated unique patterns in circulating biomarkers in patients receiving prehospital TP, suggesting that a deeper analysis could reveal causal features specific to TBI patients. METHODS: A novel proteomic database (SomaLogic Inc., aptamer-based assay, 7K platform) was generated using admission blood samples from a subset of patients (n=149) from the PAMPer Trial. This proteomic dataset was combined with previously reported metabolomic and lipidomic datasets from these same patients. A 2-step analysis was performed to identify factors that promote survival in E2-TBI patients who had received early TP. First, features were selected using both linear and multivariate-latent-factor regression analyses. Then, the selected features were entered into the causal mediation analysis. RESULTS: Causal mediation analysis of observable features identified 16 proteins and 41 lipids with a high proportion of mediated effect (>50%) to explain the survival benefit of early TP in E2-TBI patients. The multivariate latent-factor regression analyses also uncovered 5 latent clusters of features with a proportion effect >30%, many in common with the observable features. Among the observable and latent features were protease inhibitors known to inhibit activated protein C and block fibrinolysis (SERPINA5 and CPB2), a clotting factor (factor XI), as well as proteins involved in lipid transport and metabolism (APOE3 and sPLA(2)-XIIA). CONCLUSIONS: These findings suggest that severely injured patients with TBI process exogenous plasma differently than those without TBI. The beneficial effects of early TP in E2-TBI patients may be the result of improved blood clotting and the effect of brain protective factors independent of coagulation.

Best case/worst case for the trauma ICU: Development and pilot testing of a communication tool for older adults with traumatic injury.

BACKGROUND: "Best Case/Worst Case" (BC/WC) is a communication tool to support shared decision making in older adults with surgical illness. We aimed to adapt and test BC/WC for use with critically ill older adult trauma patients. METHODS: We conducted focus groups with 48 trauma clinicians in Wisconsin, Texas, and Oregon. We used qualitative content analysis to characterize feedback and adapted the tool to fit this setting. Using rapid sequence iterative design, we developed an implementation tool kit. We pilot tested this intervention at two trauma centers using a pre-post study design with older trauma patients in the intensive care unit (ICU). Main outcome measures included study feasibility, intervention acceptability, quality of communication, and clinician moral distress. RESULTS: BC/WC for trauma patients uses a graphic aid to document major events over time, illustrate plausible scenarios, and convey uncertainty. We enrolled 86 of 116 eligible patients and their surrogates (48 pre/38 postintervention). The median patient age was 72 years (51-95 years) and mean Geriatric Trauma Outcome Score was 126.1 (±30.6). We trained 43 trauma attendings and trauma fellows to use the intervention. Ninety-four percent could perform essential tool elements after training. The median end-of-life communication score (scale 0-10) improved from 4.5 to 6.6 (p = 0.006) after intervention as reported by family and from 4.1 to 6.0 (p = 0.03) as reported by nurses. Moral distress did not change. However, there was improvement (less distress) reported by physicians regarding "witnessing providers giving false hope" from 7.34 to 5.03 (p = 0.022). Surgeons reported the tool put multiple clinicians on the same page and was useful for families, but tedious to incorporate into rounds. CONCLUSION: BC/WC trauma ICU is acceptable to clinicians and may support improved communication in the ICU. Future efficacy testing is threatened by enrollment challenges for severely injured older adults and their family members. LEVEL OF EVIDENCE: Therapeutic, level III.

Multi-omic analysis in injured humans: Patterns align with outcomes and treatment responses.

Trauma is a leading cause of death and morbidity worldwide. Here, we present the analysis of a longitudinal multi-omic dataset comprising clinical, cytokine, endotheliopathy biomarker, lipidome, metabolome, and proteome data from severely injured humans. A "systemic storm" pattern with release of 1,061 markers, together with a pattern suggestive of the "massive consumption" of 892 constitutive circulating markers, is identified in the acute phase post-trauma. Data integration reveals two human injury response endotypes, which align with clinical trajectory. Prehospital thawed plasma rescues only endotype 2 patients with traumatic brain injury (30-day mortality: 30.3 versus 75.0%; p = 0.0015). Ubiquitin carboxy-terminal hydrolase L1 (UCHL1) was identified as the most predictive circulating biomarker to identify endotype 2-traumatic brain injury (TBI) patients. These response patterns refine the paradigm for human injury, while the datasets provide a resource for the study of critical illness, trauma, and human stress responses.

Association of the Risk of a Venous Thromboembolic Event in Emergency vs Elective General Surgery.

Importance: Trauma patients have an increased risk of venous thromboembolism (VTE), partly because of greater inflammation. However, it is unknown if this association is present in patients who undergo emergency general surgery (EGS). Objectives: To investigate whether emergency case status is independently associated with VTE compared with elective case status and to test the hypothesis that emergency cases would have a higher risk of VTE. Design, Setting, and Participants: This retrospective cohort study used the American College of Surgeons National Surgical Quality Improvement Program database from January 1, 2005, to December 31, 2016, for all cholecystectomies, ventral hernia repairs (VHRs), and partial colectomies (PCs) to obtain a sample of commonly encountered emergency procedures that have elective counterparts. Emergency surgeries were then compared with elective surgeries. The dates of analysis were January 1 to 31, 2019. Main Outcomes and Measures: The primary outcome was VTE at 30 days. A multivariable analysis controlling for age, sex, body mass index, bleeding disorder, disseminated cancer, laparoscopy approach, and surgery type was performed. Results: There were 604 537 adults undergoing surgical procedures over 12 years (mean [SD] age, 55.3 [16.6] years; 61.4% women), including 285 847 cholecystectomies, 158 500 VHRs, and 160 190 PCs. The rate of VTE within 30 days was 1.9% for EGS and 0.8% for elective surgery, a statistically significant difference. Overall, 4607 patients (0.8%) had deep vein thrombosis, and 2648 patients (0.4%) had pulmonary embolism. A total of 6624 VTEs (1.1%) occurred in the cohort. As expected, when VTE risk was examined by surgery type, the risk increased with invasiveness (0.5% for cholecystectomy, 0.8% for VHR, and 2.4% for PC; P < .001). On multivariable analysis, EGS was independently associated with VTE (odds ratio [OR], 1.70; 95% CI, 1.61-1.79). Also associated with VTE were open surgery (OR, 3.38; 95% CI, 3.15-3.63) and PC (OR, 1.86; 95% CI, 1.73-1.99). Conclusions and Relevance: In this cohort study, emergency surgery and increased invasiveness appeared to be independently associated with VTE compared with elective surgery. Further study on methods to improve VTE chemoprophylaxis is highly recommended for emergency and more extensive operations to reduce the risk of potentially lethal VTE.

One-year mortality in geriatric trauma patients: Improving upon the geriatric trauma outcomes score utilizing the social security death index.

BACKGROUND: Geriatric Trauma Outcomes Score (GTOS) predicts in-patient mortality in geriatric trauma patients and has been validated in a prospective multicenter trial and expanded to predict adverse discharge (GTOS II). We hypothesized that these formulations actually underestimate the downstream sequelae of injury and sought to predict longer-term mortality in geriatric trauma patients. METHODS: The Parkland Memorial Hospital Trauma registry was queried for patients 65 years or older from 2001 to 2013. Patients were then matched to the Social Security Death Index. The primary outcome was 1-year mortality. The original GTOS formula (variables of age, Injury Severity Score [ISS], 24-hour transfusion) was tested to predict 1-year mortality using receiver operator curves. Significant variables on univariate analysis were used to build an optimal multivariate model to predict 1-year mortality (GTOS III). RESULTS: There were 3,262 patients who met inclusion. Inpatient mortality was 10.0% (324) and increased each year: 15.8%, 1 year; 17.8%, 2 years; and 22.6%, 5 years. The original GTOS equation had an area under the curve of 0.742 for 1-year mortality. Univariate analysis showed that patients with 1-year mortality had on average increased age (75.7 years vs. 79.5 years), ISS (11.1 vs. 19.1), lower GCS score (14.3 vs. 10.5), more likely to require transfusion within 24 hours (11.5% vs. 31.3%), and adverse discharge (19.5% vs. 78.2%; p < 0.0001 for all). Multivariate logistic regression was used to create the optimal equation to predict 1-year mortality: (GTOSIII = age + [0.806 × ISS] + 5.55 [if transfusion in first 24 hours] + 21.69 [if low GCS] + 34.36 [if adverse discharge]); area under the curve of 0.878. CONCLUSION: Traumatic injury in geriatric patients is associated with high mortality rates at 1 year to 5 years. GTOS III has robust test characteristics to predict death at 1 year and can be used to guide patient centered goals discussions with objective data. LEVEL OF EVIDENCE: Prognostic, level III.

Uncertain Patency of Covered Stents Placed for Traumatic Axillosubclavian Artery Injury.

BACKGROUND: Traumatic axillosubclavian artery injuries (ASAIs) are uncommon but devastating. There is increasing acceptance of covered stent use for ASAIs. However, epidemiologic and long-term outcomes data are limited. We investigated national trends in ASAI management and our institutional outcomes after emergent covered stent placement and open surgical repairs for ASAIs. STUDY DESIGN: A review of the National Trauma Data Bank from 2010 to 2012 was performed for epidemiologic data. International Classification of Diseases and procedure codes were used to identify ASAIs and therapy type. A single-center, retrospective review of consecutive patients with ASAIs between January 2010 and August 2014 was also performed. RESULTS: National Trauma Data Bank review included 511,286 patients with 520 ASAIs, yielding an incidence of 0.1%. Endovascular therapy was used in 76 patients (14.7%) vs open repair in 280 patients (53.8%). Nonoperative or unknown treatment was used in 164 (31.5%). From 2010 to 2012, endovascular interventions increased from 11.3% to 17.2% (p < 0.05). Endovascular therapy was used more frequently in blunt compared with penetrating trauma (59.2% vs 40.8%; p < 0.005). Our institutional review identified 10 ASAIs treated with covered stents with a median follow-up of 117 days (interquartile range 13 to 447 days) and 70% lost to follow-up. No treatment-related mortality or amputation occurred. Stent occlusion occurred in 30% at a median of 132 days (interquartile range 30 to 223 days). Three patients with ASAIs were initially treated with open surgery, 2 died and the third required ligation. CONCLUSIONS: Covered stents are being used increasingly for ASAIs nationwide, despite variable reports of durability. Follow-up is poor in urban trauma centers and might be responsible for the variable patency. Population-based efforts to improve compliance among trauma patients can help improve covered stent patency in ASAI.

The year in burns 2013.

Approximately 3415 research articles were published with burns in the title, abstract, and/or keyword in 2013. We have continued to see an increase in this number; the following reviews articles selected from these by the Editor of one of the major journals (Burns) and colleagues that in their opinion are most likely to have effects on burn care treatment and understanding. As we have done before, articles were found and divided into the following topic areas: epidemiology of injury and burn prevention, wound and scar characterization, acute care and critical care, inhalation injury, infection, psychological considerations, pain and itching management, rehabilitation and long-term outcomes, and burn reconstruction. The articles are mentioned briefly with notes from the authors; readers are referred to the full papers for details.

Application of the Berlin definition in PROMMTT patients: the impact of resuscitation on the incidence of hypoxemia.

BACKGROUND: Acute lung injury following trauma resuscitation remains a concern despite recent advances. With the use of the PROMMTT study population, the risk of hypoxemia and potential modifiable risk factors are studied. METHODS: Patients with survival for 24 hours or greater with at least one intensive care unit day were included in the analysis. Hypoxemia was categorized using the Berlin definition for adult respiratory distress syndrome: none (PaO2-to-FIO2 ratio [P/F] > 300 mm Hg), mild (P/F, 201-300 mm Hg), moderate (P/F, 101-200 mm Hg) or severe (P/F ≤ 100 mm Hg). The cohort was dichotomized into those with none or mild hypoxemia and those with moderate or severe injury. Early resuscitation was defined as that occurring 0 hour to 6 hours from arrival; late resuscitation was defined as that occurring 7 hours to 24 hours. Multivariate logistic regression models were developed controlling for age, sex, mechanisms of injury, arrival physiology, individual Abbreviated Injury Scale (AIS) scores, blood transfusions, and crystalloid administration. RESULTS: Of the patients 58.7% (731 of 1,245) met inclusion criteria. Hypoxemia occurred in 69% (mild, 24%; moderate, 28%; severe, 17%). Mortality was highest (24%) in the severe group. During early resuscitation (0-6 h), logistic regression revealed age (odd ratio [OR], 1.02; 95% confidence interval [CI], 1.00-1.04), chest AIS score (OR, 1.31; 95% CI, 1.10-1.57), and intravenously administered crystalloid fluids given in 500 mL increments (OR, 1.12; 95% CI, 1.01-1.25) as predictive of moderate or severe hypoxemia. During late resuscitation, age (OR, 1.02; 95% CI, 1.00-1.04), chest AIS score (OR, 1.33; 95% CI, 1.11-1.59), and crystalloids given during this period (OR, 1.05; 95% CI, 1.01-1.10) were also predictive of moderate-to-severe hypoxemia. Red blood cell, plasma, and platelet transfusions (whether received during early or late resuscitation) failed to demonstrate an increased risk of developing moderate/severe hypoxemia. CONCLUSION: Severe chest injury, increasing age, and crystalloid-based resuscitation, but not blood transfusions, were associated with increased risk of developing moderate-to-severe hypoxemia following injury.

Increasing time to operation is associated with decreased survival in patients with a positive FAST examination requiring emergent laparotomy.

INTRODUCTION: Focused assessment with sonography for trauma (FAST) is commonly used to facilitate the timely diagnosis of life-threatening hemorrhage in injured patients. Most patients with positive findings on FAST require laparotomy. Although it is assumed that an increasing time to operation (T-OR) leads to higher mortality, this relationship has not been quantified. This study sought to determine the impact of T-OR on survival in patients with a positive FAST who required emergent laparotomy. METHODS: We retrospectively analyzed patients from the PRospective Observational Multicenter Major Trauma Transfusion (PROMMTT) study who underwent laparotomy within 90 minutes of presentation and had a FAST performed. Cox proportional hazards models including Injury Severity Score (ISS), age, base deficit, and hospital site were created to examine the impact of increasing T-OR on in-hospital survival at 24 hours and 30 days. The impact of time from the performance of the FAST examination to operation (TFAST-OR) on in-hospital mortality was also examined using the same model. RESULTS: One hundred fifteen patients met study criteria and had complete data. Increasing T-OR was associated with increased in-hospital mortality at 24 hours (hazard ratio [HR], 1.50 for each 10-minute increase in T-OR; confidence interval [CI], 1.14-1.97; p = 0.003) and 30 days (HR, 1.41; CI, 1.18-2.10; p = 0.002). Increasing TFAST-OR was also associated with higher in-hospital mortality at 24 hours (HR, 1.34; CI, 1.03-1.72; p = 0.03) and 30 days (HR, 1.40; CI, 1.06-1.84; p = 0.02). CONCLUSION: In patients with a positive FAST who required emergent laparotomy, delay in operation was associated with increased early and late in-hospital mortality. Delays in T-OR in trauma patients with a positive FAST should be minimized.

Clinical examination in complement with computed tomography scan: an effective method for identification of cervical spine injury.

OBJECTIVE: The purpose of this study was to prospectively evaluate a protocol that assesses the efficacy and sensitivity of clinical examination in complement with computed tomographic (CT) scan in screening for cervical spine (c-spine) injury. METHODS: During the 26-month period from March 2005 to May 2007, blunt trauma patients older than 13 years were prospectively entered into a study protocol. If patients were awake and alert with Glasgow Coma Score (GCS) >or=14, clinical examination of the neck was performed. Clinical examination was performed regardless of distracting injuries. If the patient had no complaints of pain or tenderness, the cervical collar was removed. Patients with complaints of c-spine pain or tenderness and patients with GCS score <14 underwent CT scanning for evaluation of the entire c-spine. RESULTS: One thousand six hundred eighty seven patients were prospectively assessed for blunt c-spine injury. Fourteen hundred thirty-nine patients had GCS score >or=14, 897 (62%) of which had a negative clinical examination of the c-spine and subsequently had cervical collars removed. Two patients (0.2%) whose clinical examination results disclosed nothing abnormal were later found to have a c-spine injury. Five hundred forty-two patients with GCS score >or=14 had a positive c-spine clinical examination, of which 134 (24%) were diagnosed with c-spine injury. One hundred thirty-three (99%) c-spine injuries were identified by CT scan. The c-spine injury missed by CT scan was a radiologic misinterpretation. For patients with c-spine injury with GCS score >or=14, both sensitivities of clinical examination and CT scan were 99%. Two hundred forty-eight patients had GCS score <14, of which 5 (2.0%) were diagnosed with c-spine injury. CT scan identified all c-spine injuries for patients with GCS score <14. CONCLUSIONS: In awake and alert blunt trauma patients, clinical examination is a sensitive screening method for c-spine injury. Clinical examination allows for the majority of blunt trauma patients to have their c-spines cleared safely without radiologic screening. Clinical examination in complement with CT scan is a sensitive and an effective method for identification of c-spine injury in awake and alert patients with symptoms of c-spine injury. CT scan is the sensitive and effective test for screening and diagnosis of c-spine injury in blunt trauma patients with altered mental status.

Anatomic location of penetrating lower-extremity trauma predicts compartment syndrome development.

BACKGROUND: Compartment syndrome of the lower extremity can be a difficult diagnosis to make with serious consequences if diagnosis and intervention is delayed. Identifying patients who are more likely to develop this syndrome can help prevent the associated complications. The purpose of this study was to evaluate whether the anatomic location of the penetrating lower-extremity injuries can predict development of compartment syndrome. METHODS: A retrospective chart review was performed of all patients admitted for a minimum of 23 hours to the University of South Alabama trauma center for penetrating lower-extremity trauma during the 8-year period from July 1998 through June 2006. Patients were entered in the study if wound trajectory was confined to the lower extremity between the inguinal ligament and the ankle. Injuries were categorized as above knee (AK) or below knee (BK), and whether the injury was in the proximal or distal half of the extremity segment. Clinical examination or compartmental pressures were used to diagnose BK compartment syndrome. RESULTS: A total of 321 patients sustained 393 lower-extremity injuries during the study period, of which 255 (65%) were AK and 138 (35%) were BK. Thirty-one (8%) lower extremities developed BK compartment syndrome with 29 (94%) secondary to penetrating injuries of the BK segment. All BK injuries that developed compartment syndrome were located in the proximal half of the BK segment. Eighteen (7%) AK injuries underwent BK 4-compartment fasciotomy, 16 (6%) of which were prophylactic after surgical intervention for AK vascular injury. Two patients (1%) developed postoperative BK compartment syndrome after superficial femoral vein ligation. All AK injuries that underwent fasciotomy sustained vascular injuries requiring surgical intervention. No BK compartment syndromes occurred in any patients with expectantly managed AK or distal BK injuries. CONCLUSIONS: Injuries to the proximal half of the BK segment are the most common cause for the development of compartment syndrome from penetrating injuries of the lower extremity. Development of BK compartment syndrome because of penetrating AK injury is rare without an associated surgically significant vascular injury. Observational admission for compartment syndrome development in patients with penetrating injury to the AK segment or distal BK segment is unnecessary.

Does increased emergency medical services prehospital time affect patient mortality in rural motor vehicle crashes? A statewide analysis.

BACKGROUND: Fatality rates from rural vehicular trauma are almost double those found in urban settings. It has been suggested that increased prehospital time is a factor that adversely affects fatality rates in rural vehicular trauma. By linking and analyzing Alabama's statewide prehospital data, emergency medical services (EMS) prehospital time was assessed for rural and urban vehicular crashes. METHODS: An imputational methodology permitted linkage of data from police motor vehicle crash (MVC) and EMS records. MVCs were defined as rural or urban by crash location using the United States Census Bureau criteria. Areas within Alabama that fell outside the Census Bureau definition of urban were defined as rural. Prehospital data were analyzed to determine EMS response time, scene time, and transport time in rural and urban settings. RESULTS: Over a 2-year period from January 2001 through December 2002, data were collected from EMS Patient Care Reports and police crash reports for the entire state of Alabama. By using an imputational methodology and join specifications, 45,763 police crash reports were linked to EMS Patient Care Reports. Of these, 34,341 (75%) were injured in rural settings and 11,422 (25%) were injured in urban settings. A total of 714 mortalities were identified, of which 611 (1.78%) occurred in rural settings and 103 (.90%) occurred in urban settings (P < .0001). When mortalities occurred, the mean EMS response time in rural settings was 10.67 minutes and 6.50 minutes in urban settings (P < .0001). When mortalities occurred, the mean EMS scene time in rural settings was 18.87 minutes and 10.83 minutes in urban settings (patients who were dead on scene and extrication patients were excluded from both settings) (P < .0001). When mortalities occurred, the mean EMS transport time in rural settings was 12.45 minutes and 7.43 minutes in urban settings (P < .0001). When mortalities occurred, the overall mean prehospital time in rural settings was 42.0 minutes and 24.8 minutes in urban settings (P < .0001). The mean EMS response time for rural MVCs with survivors was 8.54 minutes versus a mean of 10.67 minutes with mortalities (P < .0001). The mean EMS scene time for rural MVCs with survivors was 14.81 minutes versus 18.87 minutes with mortalities (patients who were dead on scene and extrication patients were excluded) (P = .0014). CONCLUSIONS: Based on this statewide analysis of MVCs, increased EMS prehospital time appears to be associated with higher mortality rates in rural settings.

On-scene intravenous line insertion adversely impacts prehospital time in rural vehicular trauma.

Fatality rates from rural vehicular trauma are almost double those found in urban settings. Increased emergency medical services (EMS) prehospital time has been implicated as one of the causative factors for higher rural fatality rates. Advanced Trauma Life Support guidelines suggest scene time should not be extended to insert an intravenous catheter (IV). The purpose of this study was to assess the association between intravenous line placement and motor vehicle crash (MVC) scene time in rural and urban settings. An imputational methodology using the National Highway Traffic Safety Administration Crash Outcome Data Evaluation System permitted linkage of data from police motor vehicle crash and EMS records. Intergraph GeoMedia software permitted this linked data to be plotted on digital maps for segregation into rural and urban groups. MVCs were defined as rural or urban by location of the accident using the U.S. Bureau of Census Criteria. Linked data were analyzed to assess for EMS time on-scene, on-scene IV insertion, on-scene IV insertion attempts, and patient mortality. Over a 2-year period from January 2001 through December 2002, data were collected from Alabama EMS patient care reports (PCRs) and police crash reports. A total of 45,763 police crash reports were linked to EMS PCRs. Of these linked crash records, 34,341 (75%) and 11,422 (25%) were injured in rural and urban settings, respectively. Six hundred eleven (1.78%) mortalities occurred in rural settings and 103 (0.90%) in urban settings (P < 0.005). There were 6273 (18.3%) on-scene IV insertions in the rural setting and 1,290 (11.3%) in the urban setting (P < 0.005). Mean EMS time on-scene when single IV insertion attempts occurred was 16.9 minutes in the rural setting and 14.5 minutes in the urban setting (P < 0.0001). When two attempts of on-scene IV insertion were made, mean EMS time on-scene in the rural setting (n = 891 [2.6%]) was 18.4 minutes and 15.7 minutes in the urban setting (n = 142 [1.2%; P < 0.005). Excluding dead on-scene patients, mean EMS time on-scene when mortalities occurred in rural and urban settings was 18.9 minutes and 10.8 minutes, respectively (P < 0.005). On-scene IV insertion occurred with significantly greater frequency in rural than urban settings. This incurs greater EMS time on-scene and prehospital time that may be associated with increased vehicular fatality rates in rural settings.

Increased rural vehicular mortality rates: roadways with higher speed limits or excessive vehicular speed?

OBJECTIVE: The purpose of this study was to assess whether higher roadway speed limits and excessive vehicular speed were contributing factors to increased rural vehicular mortality rates in the State of Alabama. METHODS: During a 2-year period from January 2001 through December 2002, data were collected from Alabama police crash reports and EMS patient care reports. Police crash reports and EMS patient care reports were linked utilizing an imputational methodology. Vehicular speeds were estimated speeds extracted from police crash reports. Vehicular speeding was defined as estimated speeds greater than posted speed limits. RESULTS: A total of 38,117 reports were linked. Of those, 30,260 (79%) and 7,857 (21%) were injured in rural and urban settings, respectively. The frequency of vehicular speeding was significantly higher in rural (18.8%) than in urban settings (9.4%) (p < 0.0001). At vehicular speeds less than 26 mph, mortality rates for occupants of speeding and nonspeeding vehicles were not significantly different in rural (1.68%, 0.82%) and urban (1.44%, 0.59%) settings (p = 0.78,1.0), respectively. On roads with posted speeds of 26 to 50 mph, mortality rates for occupants in speeding vehicles were not significantly different in rural (3.75%) and urban (2.23%) settings (p = 0.1360). For occupants of nonspeeding vehicles on roads with posted speeds of 26 to 50 mph, mortality rates were significantly greater in rural (0.72%) than in urban (0.35%) settings (p < 0.0032). On roads with posted speeds of 51 to 70 mph, mortality rates for occupants in speeding vehicles were not significantly different in rural (5.80%) and urban (4.95%) settings (p = 1.0). For occupants of nonspeeding vehicles on roads with posted speeds of 51 to 70 mph, mortality rates were significantly greater in rural (1.92%) than in urban (0.94%) settings (p = 0.01). CONCLUSIONS: Vehicular speeding occurs with significantly higher frequency in rural settings. This imparts a greater overall vehicular mortality rate. At higher rates of speed, mortality rates for travel above the posted speed limit are similar in rural and urban settings; however, mortality rates for travel within the posted speed limit are greater in rural settings. This suggests factors beyond higher and excessive vehicular speed impart higher rates in rural settings.