Citation

Morrison JJ, Dickson EJ, Jansen JO, Midwinter MJ. J. Emerg. Trauma Shock 2012; 5(3): 233-237.

Affiliation

Academic Department of Military Surgery and Trauma, Royal Centre for Defence Medicine, Birmingham Research Park, Vincent Drive, Edgbaston, Birmingham B15 2SQ, UK.

Copyright

(Copyright © 2012, INDO-US Emergency and Trauma Collaborative, Publisher Medknow Publications)

DOI

10.4103/0974-2700.99690

PMID

22988401

Abstract

BACKGROUND: An assessment of hemodynamic stability is central to surgical decision-making in the management of battlefield ballistic torso trauma (BBTT). AIMS: To analyse the utility of admission physiological parameters in characterising hemodynamic stability. SETTINGS AND DESIGN: A retrospective analysis of consecutive admissions, with BBTT, to forward surgical facility in Afghanistan. MATERIALS AND METHODS: The cohorts' admission physiology, need for operative intervention, and mortality data were collected retrospectively. The cohort was divided into patients requiring surgery for Life-Threatening Torso Hemorrhage (LTTH) and those not requiring immediate surgery (non-LTTH). STATISTICAL ANALYSIS: Parameters were compared using two sample t tests, Mann-Whitney, Fisher's exact, and Chi-square tests. Receiver operator characteristic curves were used to identify significant parameters and determine optimum cut-off values. RESULTS: A total of 103 patients with isolated BBTT were identified: 44 in the LTTH group and 59 in the non-LTTH group. The mean New Injury Severity Score ± Standard Deviation (NISS±SD) was 28±14 and 13±12, respectively. The heart rate, systolic blood pressure (SBP), pulse pressure, shock index (SI=heart rate/SBP) and base excess were analysed. SI correlated best with the need for surgical torso hemorrhage control, P<0.05. An optimal cut-off of 0.9 was identified, producing a positive and negative predictive value of 81% and 82%, respectively. CONCLUSIONS: Shock index (SI) is a useful parameter for helping military surgeons triage BBTT, identifying patients requiring operative torso hemorrhage control. SI performance requires a normal physiological response to hypovolemia, and thus should always be considered in clinical context.

Language: en