It may sound weird but it is a widely accepted fact that the body does try to regulate bladder temperature. These are just a few of the hundreds of reputable sources that confirm this. It is not a trick.
Urination - people will have to urinate from cold diuresis. Vasoconstriction creates greater volume pressure in the blood stream. The kidneys pull off excess fluid to reduce the pressure. A full bladder results in body heat being used to keep urine warm rather than vital organs. Once the person has urinated, it precious body heat will be used to maintain the temperature of vital organs. So in the end urinating will help conserve heat. You will need to help the person urinate.
from:
Outdoor Action Guide to
Hypothermia And Cold Weather Injuries
http://www.princeton.edu/~oa/safety/hypocold.shtml
The hypothermic person will have to urinate from cold diuresis; a full bladder can mean additional heat loss. Urinating will conserve some heat. You will have to help the hypothermic person do this.
From
Treating Hypothermia
http://observe.arc.nasa.gov/nasa/earth/wind_chill/chill_hypo.html
The hypothermic person will have to urinate from cold diuresis; a full bladder can mean additional heat loss. Urinating will conserve some heat. You will have to help the hypothermic person do this.
From
Hypothermia
http://www.kcmo.org/health/factsheets/HypothermiaFactSheet.pdf
A full bladder results in body heat being used to keep urine warm rather than vital organs. Once the person has urinated, it precious body heat will be used to maintain the temperature of vital organs. So in the end urinating will help conserve heat.
From
United States Search and Rescue Task Force
Hypothermia and Cold Weather Injuries
http://www.ussartf.org/hypothermia_cold_weather_injuries.htm