The Evolution of Trauma in Los Angeles County Over More Than a Decade.

OBJECTIVE: Explore trends in trauma incidence and mortality rates in Los Angeles County. DESIGN: Data for patients treated at Los Angeles County trauma centers from 2000 to 2011 were analyzed for this study. Age-adjusted incidence and mortality rates were calculated by gender, race, injury type, injury severity, and mechanism of injury. Trends were assessed using linear regression to determine the annual percentage change (APC). RESULTS: There were 223 773 patients included. The trauma incidence rate increased by 14.6% driven by an increase in blunt injury of 5.4% annually (P < .05). Penetrating injury decreased at -6.9% APC (P < .01). Mortality rate decreased at -11.5% APC (P < .01), with reduction in both blunt (-6.8% APC [P < .01]) and penetrating injuries (-16.7% APC [P < .01]). The trends in mortality persisted with stratification by age, gender, race, and injury severity score. CONCLUSION: In this mature trauma system, the trauma incidence increased slightly from 2000 to 2011, while the mortality steadily declined. Public health officials in other areas could perform a similar self-evaluation to describe and monitor injury events and trends in their jurisdictions, a reassessment of priority and trauma system resource allocation, which will directly benefit the regional population.

Should we still use motor vehicle intrusion as a sole triage criterion for the use of trauma center resources?

BACKGROUND: Motor vehicle intrusion (MVI) is one of the field triage criteria recommended by the American College of Surgeons Committee of Trauma (ACS-COT) and Centers for Disease Control and Prevention (CDC). However, the evidence supporting its validity is scarce. The purpose of this study was to evaluate the validity of this criterion and assess its impact on overtriage or undertriage. PATIENTS AND METHODS: This was a retrospective study based on the Los Angeles County Trauma and Emergency Medicine Information System (TEMIS) Trauma database. Included in the analysis were patients with MVI as the sole criterion for trauma center triage. Physiological characteristics, severity of injury, and outcomes of the MVI patients were compared between different age groups. Further, a logistic regression model was used to identify factors significantly associated with the need for trauma center resources. RESULTS: During the period 2002-2012, a total of 10,554 trauma patients involved in motor vehicle crashes had documentation of MVI. A subgroup of 3998 patients (37.9%) did not meet any other criteria that require immediate transportation to a designated trauma center. Only 0.7% of these patients had hypotension and 0.1% had deterioration of the Glasgow Coma Scale on admission to the emergency room. Overall, 18.8% of patients required trauma center resources defined as intubation in the emergency room, certain surgical procedures, in-hospital death, or intensive care unit admission. Age ≥65 years, male gender, prehospital heart rate >100/min, and systolic blood pressure <110 mmHg were significantly associated with the need for trauma center resources. CONCLUSIONS: The MVI itself did not appear to be a strong indicator for the use of trauma center resources and is associated with excessive overtriage. However, age >65 years, systolic blood pressure <110 mmHg, and heart rate >100/min were significant predictors for the need of trauma center resources. The MVI criterion should be refined for better utilization of trauma center resources.

Compliance With Evidence-Based Guidelines and Interhospital Variation in Mortality for Patients With Severe Traumatic Brain Injury.

IMPORTANCE: Compliance with evidence-based guidelines in traumatic brain injury (TBI) has been proposed as a marker of hospital quality. However, the association between hospital-level compliance rates and risk-adjusted clinical outcomes for patients with TBI remains poorly understood. OBJECTIVE: To examine whether hospital-level compliance with the Brain Trauma Foundation guidelines for intracranial pressure monitoring and craniotomy is associated with risk-adjusted mortality rates for patients with severe TBI. DESIGN, SETTING, AND PARTICIPANTS: All adult patients (N = 734) who presented to a regional consortium of 14 hospitals from January 1, 2009, through December 31, 2010, with severe TBI (ie, blunt head trauma, Glasgow Coma Scale score of <9, and abnormal intracranial findings from computed tomography of the head). Data analysis took place from December 2013 through January 2015. We used hierarchical mixed-effects models to assess the association between hospital-level compliance with Brain Trauma Foundation guidelines and mortality rates after adjusting for patient-level demographics, severity of trauma (eg, mechanism of injury and Injury Severity Score), and TBI-specific variables (eg, cranial nerve reflexes and findings from computed tomography of the head). MAIN OUTCOMES AND MEASURES: Hospital-level risk-adjusted inpatient mortality rate and hospital-level compliance with Brain Trauma Foundation guidelines for intracranial pressure monitoring and craniotomy. RESULTS: Unadjusted mortality rates varied by site from 20.0% to 50.0% (median, 42.6; interquartile range, 35.5-46.2); risk-adjusted rates varied from 24.3% to 56.7% (median, 41.1; interquartile range, 36.4-47.8). Overall, only 338 of 734 patients (46.1%) with an appropriate indication underwent placement of an intracranial pressure monitor and only 134 of 335 (45.6%) underwent craniotomy. Hospital-level compliance ranged from 9.6% to 65.2% for intracranial pressure monitoring and 6.7% to 76.2% for craniotomy. Despite widespread variation in compliance across hospitals, we found no association between hospital-level compliance rates and risk-adjusted patient outcomes (Spearman ρ = 0.030 [P = .92] for ICP monitoring and Spearman ρ = -0.066 [P = .83] for craniotomy). CONCLUSIONS AND RELEVANCE: Hospital-level compliance with evidence-based guidelines has minimal association with risk-adjusted outcomes in patients with severe TBI. Our results suggest that caution should be taken before using compliance with these measures as independent quality metrics. Given the complexity of TBI care, outcomes-based metrics, including functional recovery, may be more accurate than current process measures at determining hospital quality.

Intracranial pressure monitoring and inpatient mortality in severe traumatic brain injury: A propensity score-matched analysis.

BACKGROUND: Although intracranial pressure (ICP) monitoring in severe traumatic brain injury (TBI) is recommended by the Brain Trauma Foundation, the benefits remain controversial. We sought to determine the impact of ICP monitor placement on inpatient mortality within a regional trauma system after correcting for selection bias through propensity score matching. METHODS: Data were collected on all severe TBI cases presenting to 14 trauma centers during the 2-year study period (2009-2010). Inclusion criteria were as follows: blunt injury, Glasgow Coma Scale (GCS) score of 8 or lower in the emergency department, and abnormal intracranial findings on head computed tomography (CT). Two separate multivariate logistic regression models were used to predict ICP monitor placement and inpatient mortality after controlling for demographics, severity of injury, comorbidities, and TBI-specific variables (GCS score, pupil reactivity, international normalized ratio, and nine specific head CT findings). To account for selection bias, we developed a propensity score-matched model to estimate the "true" effect of ICP monitoring on in-hospital mortality. RESULT: A total of 844 patients met inclusion criteria; 22 died on arrival to the emergency department. Inpatient mortality was 38.8%; 46.0% of the patients underwent ICP monitor placement. Unadjusted mortality rates were significantly lower in the ICP monitoring group (30.7% vs. 45.7%, p < 0.001). ICP monitor placement was positively associated with CT findings of subdural hematoma, intraparenchymal contusion, and mass effect and negatively associated with age, alcoholism, and elevated international normalized ratio. After adjusting for selection bias via propensity score matching, ICP monitor placement was associated with an 8.3 percentage point reduction in the risk-adjusted mortality rate. CONCLUSION: ICP monitor placement occurred in only 46% of eligible patients but was associated with significantly decreased mortality after adjusting for baseline risk profile and the propensity to undergo monitoring. As the individual impact of ICP monitoring may vary, future efforts must determine who stands to benefit from invasive monitoring techniques. LEVEL OF EVIDENCE: Therapeutic/care management study, level III.

Re-examining outcomes after unsuccessful out-of-hospital resuscitation in the era of field termination of resuscitation guidelines and regionalized post-resuscitation care.

BACKGROUND: Dismal prognosis after failed out-of-hospital resuscitation has previously been demonstrated. Changes in resuscitation and post-resuscitation care may affect patient outcomes. We describe characteristics and outcomes of patients with out-of-hospital cardiac arrest (OOHCA) transported to specialty cardiac centers after failure of out-of-hospital interventions. METHODS: In Los Angeles (LA) County, patients with non-traumatic OOHCA with return of spontaneous circulation (ROSC) are transported to specialized cardiac care centers. Outcomes are reported to a registry maintained by the LA County Emergency Medical Services (EMS) Agency. We report patient characteristics and outcomes for the subset of patients treated at these specialty centers in whom initial ROSC was achieved in the ED. The primary outcome was neurologically intact survival, defined by a cerebral performance category (CPC) score of 1 or 2. RESULTS: 105 patients transported to the SRC after failure to achieve ROSC with out-of-hospital resuscitation were successfully resuscitated in the ED. The median age was 68 years (IQR 57-78); 74 (70%) were male. The presenting rhythm was ventricular fibrillation or ventricular tachycardia in 40 patients (38%) and 86 (82%) were witnessed. Twenty-two patients (21%) survived to hospital discharge. Of the 103 patients with known CPC scores, 13 (13% [95% CI 7-21%]) survived to hospital discharge with a CPC score of 1 or 2. No patient who survived with good neurologic outcome met criteria for termination of resuscitation in the field. CONCLUSION: Failure of out-of-hospital resuscitation is not universally predictive of poor neurologic outcome.

Survival and neurologic outcome after out-of-hospital cardiac arrest: results one year after regionalization of post-cardiac arrest care in a large metropolitan area.

BACKGROUND: Post-resuscitation care of cardiac arrest patients at specialized centers may improve outcome after out-of-hospital cardiac arrest (OOHCA). This study describes experience with regionalized care of resuscitated patients. METHODS: Los Angeles (LA) County established regionalized cardiac care in 2006. Since 2010, protocols mandate transport of nontraumatic OOHCA patients with field return of spontaneous circulation (ROSC) to a STEMI Receiving Center (SRC) with a hypothermia protocol. All SRC report outcomes to a registry maintained by the LA County Emergency Medical Services (EMS) Agency. We report the first year's data. The primary outcome was survival with good neurologic outcome, defined by a Cerebral Performance Category (CPC) score of 1 or 2. RESULTS: The SRC treated 927 patients from April 2011 through March 2012 with median age 67; 38% were female. There were 342 patients (37%) who survived to hospital discharge. CPC scores were unknown in 47 patients. Of the 880 patients with known CPC scores, 197 (22%) survived to hospital discharge with a CPC score of 1 or 2. The initial rhythm was VF/VT in 311 (34%) patients, of whom 275 (88%) were witnessed. For patients with an initial shockable rhythm, 183 (59%) survived to hospital discharge and 120 (41%) had survival with good neurologic outcome. Excluding patients who were alert or died in the ED, 165 (71%) patients with shockable rhythms received therapeutic hypothermia (TH), of whom 67 (42%) had survival with good neurologic outcome. Overall, 387 patients (42%) received TH. In the TH group, the adjusted OR for CPC 1 or 2 was 2.0 (95%CI 1.2-3.5, p = 0.01), compared with no TH. In contrast, the proportion of survival with good neurologic outcome in the City of LA in 2001 for all witnessed arrests (irrespective of field ROSC) with a shockable rhythm was 6%. CONCLUSION: We found higher rates of neurologically intact survival from OOHCA in our system after regionalization of post-resuscitation care as compared to historical data.