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Arterial oxygen desaturation during apnea in humans

Andersson, Johan (author)
Lund University,Lunds universitet,Biologiska institutionen,Naturvetenskapliga fakulteten,Department of Biology,Faculty of Science
Schagatay, Erika (author)
Mittuniversitetet,Institutionen för teknik, fysik och matematik (-2008)
 (creator_code:org_t)
1998
1998
English.
In: Undersea & Hyperbaric Medicine. - 1066-2936. ; 25:1, s. 5-21
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • We studied the effect of the human diving response, defined as bradycardia and reduced peripheral blood flow, on arterial hemoglobin desaturation. We induced a diving response of different magnitudes by using apnea in air and apnea with face immersion. Each of 21 subjects performed five apneas in air and five apneas with face immersion in 10 degrees C water. Periods of apnea in both conditions were of the same duration in any individual subject (average: 126.4 s) and the order of air and water was equally distributed among subjects. Heart rate, skin capillary blood flow, arterial blood pressure, arterial hemoglobin oxygen saturation during apneas, and end-tidal fractions of CO2 after apneas were recorded with non-invasive methods. The bradycardia and capillary blood flow reduction during apnea in air (7.8 and 37.7% change from control, respectively) were significantly potentiated by face immersion (13.6 and 55.9%, respectively). Arterial hemoglobin desaturated more during apnea in air (2.7%) compared to during apnea with face immersion (1.4%). We conclude that the potentiation of the human diving response with face immersion in cold water leads to a smaller decrease in arterial hemoglobin saturation, which may reflect an oxygen-conserving effect.

Subject headings

MEDICIN OCH HÄLSOVETENSKAP  -- Medicinska och farmaceutiska grundvetenskaper -- Fysiologi (hsv//swe)
MEDICAL AND HEALTH SCIENCES  -- Basic Medicine -- Physiology (hsv//eng)
NATURVETENSKAP  -- Biologi -- Mikrobiologi (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences -- Microbiology (hsv//eng)
MEDICIN OCH HÄLSOVETENSKAP  -- Hälsovetenskap -- Idrottsvetenskap (hsv//swe)
MEDICAL AND HEALTH SCIENCES  -- Health Sciences -- Sport and Fitness Sciences (hsv//eng)

Keyword

Adolescent
Adult
Apnea/blood
Blood Pressure
Diving/physiology
Heart Rate/physiology
Humans
Immersion/physiopathology
Male
Oxygen Consumption
Vasoconstriction
desaturation during apnea
Organism biology
Sports
Physiology

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art (subject category)
ref (subject category)

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By the author/editor
Andersson, Johan
Schagatay, Erika
About the subject
MEDICAL AND HEALTH SCIENCES
MEDICAL AND HEAL ...
and Basic Medicine
and Physiology
NATURAL SCIENCES
NATURAL SCIENCES
and Biological Scien ...
and Microbiology
MEDICAL AND HEALTH SCIENCES
MEDICAL AND HEAL ...
and Health Sciences
and Sport and Fitnes ...
Articles in the publication
Undersea & Hyper ...
By the university
Lund University
Mid Sweden University

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