SHIVERING CAPACITY AND PREDICTION OF SURVIVAL TIME

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Authors
  1. Tikuisis, P.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
Prediction models are recognized as an important decision aid in Search and Rescue operations. Differences in body types, severity of exposure, and clothing protection make the prediction of survival time multi-dimensional. While an algorithm can be designed to accept these differences, the validity of the prediction is contingent on the accuracy of the data used to calibrate the model. This is especially difficult in the case of survival time since reliable data are either not available or lack sufficient detail to adequately test the model. Despite these obstacles, a prediction model has been developed (Tikuisis and Frim 1994; Tikuisis and Keefe 1996) and is in use at Rescue Coordination Centres. To improve the model's predictive capability, knowledge of shivering capacity is required. In many situations (e.g., inadequate clothing and wet-cold exposure), the cold stress that confronts the casualty can be defended by the heat produced through shivering. Under this conditions, survival time depends on how long shivering can be sustained, which is poorly understood. The purpose of the present study was to measure shivering endurance. To advance "shivering fatigue", volunteer subjects conducted 5 h of high intensity mixed exercise prior to a stressful wet-cold exposure (10C air with 6 km * h 1(-) wind and a 10C shower for up to 4 h). TRUNCATED
Keywords
Survival time
Report Number
DCIEM-98-TM-45 — Technical Memorandum
Date of publication
01 Apr 1998
Number of Pages
17
DSTKIM No
98-02259
CANDIS No
509126
Format(s):
Hardcopy;Document Image stored on Optical Disk

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