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Hypothermia
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Created 30 Jan 2013
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Peter Menzel Photography
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![Hypothermia: The annual Snow Bath at the Winter Carnival in Quebec, Canada. Onlookers gather to cheer on these snow bathers. Seventy-five courageous men and women brave the cold. Their only protection: a bathing suit. Three quick dips in the snow interrupted with a short break out of the cold are part of the program. Ice Palace seen in the background. [1988]](https://m.psecn.photoshelter.com/img-get2/I0000cCxBdv3UxwQ/fit=180x180/fill=/g=G0000ZmLIF8Rk4jU/I0000cCxBdv3UxwQ.jpg)
![Hypothermia: The annual Snow Bath at the Winter Carnival in Quebec, Canada. Onlookers gather to cheer on these snow bathers. Seventy-five courageous men and women brave the cold. Their only protection: a bathing suit. Three quick dips in the snow interrupted with a short break out of the cold are part of the program. Ice Palace seen in the background. [1988]](https://m.psecn.photoshelter.com/img-get2/I0000puIDDsCKEGA/fit=180x180/fill=/g=G0000ZmLIF8Rk4jU/I0000puIDDsCKEGA.jpg)
![Hypothermia Research: Research on exercise in cold water, part of an assessment of exercise regimes for victims of multiple sclerosis (MS). Here, at the University of Minnesota Hypothermia laboratory in Duluth, a volunteer rides an exercise bicycle while immersed in cold water at a temperature of 50 degrees Fahrenheit. A variety of probes measure his vital functions, skin & core body temperatures. The tube connected to his mouth delivers a monitored air supply. People afflicted by MS need regular exercise, but the rise in body temperature this provokes often causes uncontrollable shaking. Exercise in cold water helps counter this effect. MODEL RELEASED [1988] .Hypothermia is a medical condition in which the victim's core body temperature has dropped to significantly below normal and normal metabolism begins to be impaired. This begins to occur when the core temperature drops below 35 degrees Celsius (95 degrees Fahrenheit). If body temperature falls below 32 °C (90 °F), the condition can become critical and eventually fatal. Body temperatures below 27 °C (80 °F) are almost uniformly fatal, though body temperatures as low as 14 °C (57.5 °F) have been known to be survivable. [[http://encycl.opentopia.com/term/Hypothermia]]](https://m.psecn.photoshelter.com/img-get2/I00005WBciDHKB6c/fit=180x180/fill=/g=G0000ZmLIF8Rk4jU/I00005WBciDHKB6c.jpg)
![Hypothermia Research: Research on exercise in cold water, part of an assessment of exercise regimes for victims of multiple sclerosis (MS). Here, at the University of Minnesota Hypothermia laboratory in Duluth, a volunteer rides an exercise bicycle while immersed in cold water at a temperature of 50 degrees Fahrenheit. A variety of probes measure his vital functions, skin & core body temperatures. The tube connected to his mouth delivers a monitored air supply. People afflicted by MS need regular exercise, but the rise in body temperature this provokes often causes uncontrollable shaking. Exercise in cold water helps counter this effect. MODEL RELEASED [1988]](https://m.psecn.photoshelter.com/img-get2/I0000r6eQEbM6pOk/fit=180x180/fill=/g=G0000ZmLIF8Rk4jU/I0000r6eQEbM6pOk.jpg)
![Hypothermia Research at the University of Minnesota Hypothermia laboratory in Duluth; volunteers immersed in cold water at a temperature of 53 degrees Fahrenheit (10 °C). A variety of probes measure their vital functions, skin & core body temperatures. MODEL RELEASED [1988]](https://m.psecn.photoshelter.com/img-get2/I0000rwCr63Li6qA/fit=180x180/fill=/g=G0000ZmLIF8Rk4jU/I0000rwCr63Li6qA.jpg)
![Hypothermia Research at the University of Minnesota Hypothermia laboratory in Duluth; Joan Bannister studying cold induced vasodilation in 35 degrees Fahrenheit (0 °C) water. Vasodilation is where blood vessels in the body become wider following the relaxation of the smooth muscle in the vessel wall. This will reduce blood pressure - since there is more room for the blood. MODEL RELEASED [1988]](https://m.psecn.photoshelter.com/img-get2/I0000ILwFLoOtbrk/fit=180x180/fill=/g=G0000ZmLIF8Rk4jU/I0000ILwFLoOtbrk.jpg)
![Hypothermia Research at the University of Minnesota Hypothermia laboratory in Duluth; volunteers in survival suit test immersed in cold water at a temperature of 53 degrees Fahrenheit (10 °C). A variety of probes measure their vital functions, skin & core body temperatures. MODEL RELEASED [1988]](https://m.psecn.photoshelter.com/img-get2/I0000cPZbAfoBw_w/fit=180x180/fill=/g=G0000ZmLIF8Rk4jU/I0000cPZbAfoBw_w.jpg)
![Hypothermia Research at the University of Minnesota Hypothermia laboratory in Duluth; volunteer lays still for shiver test as 30 °F air is blown on her. A variety of probes measure her vital functions, skin & core body temperatures. MODEL RELEASED [1988]](https://m.psecn.photoshelter.com/img-get2/I00008Qttpio33aw/fit=180x180/fill=/g=G0000ZmLIF8Rk4jU/I00008Qttpio33aw.jpg)
![Hypothermia Research at the University of Minnesota Hypothermia laboratory in Duluth; cold, fatigue, alcohol study with motorboat drive test on Lake Superior. The driver has been given measured amounts of alcohol and his reactions tested. MODEL RELEASED [1988]](https://m.psecn.photoshelter.com/img-get2/I0000jLB3fCnFJuI/fit=180x180/fill=/g=G0000ZmLIF8Rk4jU/I0000jLB3fCnFJuI.jpg)
![Hypothermia Research: Dr. Robert S. Pozos, Director of the Hypothermia Research Lab at the University of Minnesota Hypothermia in Duluth. (Blocks of ice brought in for photo.) MODEL RELEASED [1988]](https://m.psecn.photoshelter.com/img-get2/I0000Bkx5G4LSQ3c/fit=180x180/fill=/g=G0000ZmLIF8Rk4jU/I0000Bkx5G4LSQ3c.jpg)
![Hypothermia Research at the University of Minnesota Hypothermia laboratory in Duluth; volunteer immersed in cold water at a temperature of 53 degrees Fahrenheit (10 °C). A variety of probes measure his vital functions, skin & core body temperatures. MODEL RELEASED [1988]](https://m.psecn.photoshelter.com/img-get2/I0000hI7ECwJzeco/fit=180x180/fill=/g=G0000ZmLIF8Rk4jU/I0000hI7ECwJzeco.jpg)
![Hypothermia Research at the University of Minnesota Hypothermia laboratory in Duluth; volunteer, Brian Cress, warms up his body temperature after being immersed in cold water at a temperature of 53 degrees Fahrenheit (10 °C). A variety of probes measure his vital functions, skin & core body temperatures. MODEL RELEASED [1988]](https://m.psecn.photoshelter.com/img-get2/I0000h0uIzQyx5Zg/fit=180x180/fill=/g=G0000ZmLIF8Rk4jU/I0000h0uIzQyx5Zg.jpg)
![Hypothermia Research at the University of Minnesota Hypothermia laboratory in Duluth; US Coastguardsman wears a survival suit while laying on ice floating in Lake Superior for a survival suit test. Temperature of the water is about 45 degrees Fahrenheit. MODEL RELEASED [1988]](https://m.psecn.photoshelter.com/img-get2/I0000rBtYroPdmBQ/fit=180x180/fill=/g=G0000ZmLIF8Rk4jU/I0000rBtYroPdmBQ.jpg)