title: Trauma team activation and the impact on mortality.
abstract: BACKGROUND
  Trauma centers use injury mechanism, physiology, and anatomic criteria to determine the extent of trauma team activation (TTA). We examined whether physiologic variables in our three-tier TTA system stratified patients appropriately by injury severity and mortality.
  
  
  METHODS
  The trauma registry at our Level I trauma center was retrospectively reviewed for full (level 1 or L1), partial (level 2 or L2), and limited (level 3) adult TTA. Data were collected on age, injury severity score (ISS), hospital length of stay, systolic blood pressure (SBP), heart rate, respiratory rate (RR), Glasgow coma score (GCS), and intubation status. Penetrating injuries, traumatic arrests, and interfacility transfers were excluded. Data are median (25%75%). Statistical analysis included hazard ratios (HzR), Kruskal-Wallis, chi, and survival analyses. The p value overall was <0.05, and pair wise was <0.05 versus L1.
  
  
  RESULTS
  There were 494 adult TTAs for blunt injury from the scene out of 1,969 admissions. Variables associated with mortality (HzR; 95% confidence interval) by univariate analysis include SBP <90 (9.4; 4.2, 21.2), RR >29 or <10 (17.8; 4.8, 66.0), intubation status (4.5; 2.3, 8.9), and GCS <8 (9.7; 4.8, 19.9). When combined in a multivariate model to evaluate multiple predictors simultaneously, SBP <90 and GCS <8 appear to be the strongest predictors of mortality (RR and intubation were not significant in the presence of SBP and GCS). The three-tier system identified patients with increased ISS and early (< or =4 weeks) mortality risk. There was a statistically significant difference in survival between L1 and L2 at 38 days, but not for >38 days (p = 0.739).
  
  
  CONCLUSIONS
  TTA criteria selected patients with greater ISS and early mortality, but impact on long-term survival may not be appreciated. Full TTA criteria for blunt injury may be limited to GCS <8, SBP <90, RR >29 or <10, and intubation status.
authors: Department of Surgery, Milton S. Hershey Medical Center, Hershey, Pennsylvania 17033, USA. rcherry@psu.edu
authors: Robert A
authors: RA
authors: Cherry
authors: Tonya S
authors: TS
authors: King
authors: Daniel E
authors: DE
authors: Carney
authors: Patrick
authors: P
authors: Bryant
authors: Robert N
authors: RN
authors: Cooney
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D002423:Cause of Death; D003422:Critical Care / Q000458:organization & administration*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010348:Patient Care Team / Q000458:organization & administration*; D011336:Probability; D016016:Proportional Hazards Models; D012042:Registries; D012189:Retrospective Studies; D016019:Survival Analysis; D014193:Trauma Centers / Q000458:organization & administration*; D016896:Treatment Outcome; D014218:Triage / Q000379:methods; D014947:Wounds and Injuries / Q000175:diagnosis / Q000401:mortality* / Q000628:therapy