External Cooling Coupled to Reduced Extremity Pressure Device
TBMG-11367
10/01/2011
- Content
Although suited astronauts are currently cooled with a Liquid Cooled Ventilation Garment (LCVG), which can remove up to 85 percent of body heat, their effectiveness is limited because cooling must penetrate layers of skin, muscle, fat, bone, and tissue to reach the bloodstream, where its effect is prominent. Vasoconstriction further reduces the effectiveness by limiting arterial flow when exposed to cold (the frostbite response), resulting in a time constant on the order of 20 minutes from application to maximum effect. This delay can be crucial in severe exposure to hypo- or hyper-thermic conditions, compromising homeostasis.
- Citation
- "External Cooling Coupled to Reduced Extremity Pressure Device," Mobility Engineering, October 1, 2011.