Accession Number : ADA309362

Title :   Use of a Cool Vest to Reduce Heat Strain During Shipboard Firefighting.

Descriptive Note : Final rept.,

Corporate Author : NAVAL HEALTH RESEARCH CENTER SAN DIEGO CA

Personal Author(s) : Bennett, B. L. ; Hagan, R. D. ; Huey, K. A. ; Williams, F.

PDF Url : ADA309362

Report Date : NOV 1994

Pagination or Media Count : 24

Abstract : The use of a 6-pack (12 lb) cool vest (CV) can reduce heat strain in personnel wearing firefighting ensemble (FFE) and exercising in air temperatures under 37.80c (1000F). However, the 6-pack CV does not fit comfortably under the FFE Thus, the purpose of this study was to determine the effectiveness of a 5 lb 4- pack cool vest (CV), compared to no vest (NV), to reduce heat strain in personnel performing firefighting activities during fire tests aboard the Sx-USS Shadwell (LSD-15), Mobile, AL. Eight males served as subjects. Measurements included rectal (Tre) skin temperatures from the chest (Tch) upper arm (Tua), thigh (Th), and calf (Tca), and heart rate (HR) - Air temperatures in the fire space averaged 12O0C (2480F). For all subjects, dressing in FFE and execution of pre firefighting activities led to gradual increases in HR, Tre, and skin temperatures. During actual firefighting, HR, Tre, and skin temperatures rose rapidly in all subjects. However, wearing CV was associated with smaller increases (p<.02) in Tre and Tch. Our findings indicate that the use of a 5 lb 4-pack CV has the potential to reduce heat strain and increase firefighting stay time of naval personnel during training and actual shipboard firefighting.

Descriptors :   *SHIPBOARD, *FIRE FIGHTING, *HIGH HUMIDITY, *HEAT STRESS(PHYSIOLOGY), *FIRE PROTECTIVE CLOTHING, *VESTS, TEST AND EVALUATION, STRESS STRAIN RELATIONS, TEMPERATURE, NAVAL PERSONNEL, PERFORMANCE(HUMAN), ATMOSPHERIC TEMPERATURE, STRAIN(MECHANICS), COOLING, TIME, MALES, FIRES, HEART RATE, SKIN(GENERAL), HEAT TOLERANCE.

Subject Categories : Stress Physiology
      Marine Engineering
      Protective Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE