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Arterial oxygen desaturation during apnea in humans.
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för teknik, fysik och matematik.
1998 (Engelska)Ingår i: Undersea & Hyperbaric Medicine, ISSN 1066-2936, Vol. 25, nr 1, s. 21-25Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

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 of21 subjects performed five apneas in air and five apneas with face immersion in 10°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

Ort, förlag, år, upplaga, sidor
1998. Vol. 25, nr 1, s. 21-25
Nyckelord [en]
desaturation during apnea
Nationell ämneskategori
Mikrobiologi Idrottsvetenskap Fysiologi
Identifikatorer
URN: urn:nbn:se:miun:diva-2407Lokalt ID: 1606OAI: oai:DiVA.org:miun-2407DiVA, id: diva2:27439
Tillgänglig från: 2008-09-30 Skapad: 2008-09-30 Senast uppdaterad: 2018-01-12Bibliografiskt granskad

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Schagatay, Erika

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