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pubmed:abstractText |
Reliance on traditional vital signs (TVS), particularly in older patients, to identify life-threatening shock after injury may be unreliable. Shock index (SI), defined as heart rate divided by systolic blood pressure (SBP), may be a better indicator of early shock after injury than TVS. Multiplying age by SI (age x SI) may be better in older injured patients. We hypothesized that age x SI would be a better predictor of 48-hour mortality in old patients (age, >55 years) compared with TVS, whereas for young patients (age, <or=55 years), SI would be a better predictor than TVS.
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