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Behavior of oxygen saturation and blood filling in the venous capillary system of the biceps brachii muscle during a fatiguing isometric action

  • The objective of the study is to develop a better understanding of the capillary circulation in contracting muscles. Ten subjects were measured during a submaximal fatiguing isometric muscle action by use of the O2C spectrophotometer. In all measurements the capillary-venous oxygen saturation of hemoglobin (SvO2) decreases immediately after the start of loading and levels off into a steady state. However, two different patterns (type I and type II) emerged. They differ in the extent of deoxygenation (–10.37 ±2.59 percent points (pp) vs. –33.86 ±17.35 pp, P = .008) and the behavior of the relative hemoglobin amount (rHb). Type I reveals a positive rank correlation of SvO2 and rHb (? = 0.735, P <.001), whereas a negative rank correlation (? = –0.522, P <.001) occurred in type II, since rHb decreases until a reversal point, then increases averagely 13% above the baseline value and levels off into a steady state. The results reveal that a homeostasis of oxygen delivery and consumption during isometric muscle actions is possible. A roughThe objective of the study is to develop a better understanding of the capillary circulation in contracting muscles. Ten subjects were measured during a submaximal fatiguing isometric muscle action by use of the O2C spectrophotometer. In all measurements the capillary-venous oxygen saturation of hemoglobin (SvO2) decreases immediately after the start of loading and levels off into a steady state. However, two different patterns (type I and type II) emerged. They differ in the extent of deoxygenation (–10.37 ±2.59 percent points (pp) vs. –33.86 ±17.35 pp, P = .008) and the behavior of the relative hemoglobin amount (rHb). Type I reveals a positive rank correlation of SvO2 and rHb (? = 0.735, P <.001), whereas a negative rank correlation (? = –0.522, P <.001) occurred in type II, since rHb decreases until a reversal point, then increases averagely 13% above the baseline value and levels off into a steady state. The results reveal that a homeostasis of oxygen delivery and consumption during isometric muscle actions is possible. A rough distinction in two types of regulation is suggested.show moreshow less

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Metadaten
Author details:Silas DechORCiD, Frank N. BittmannORCiDGND, Laura V. SchaeferORCiDGND
URN:urn:nbn:de:kobv:517-opus4-460166
DOI:https://doi.org/10.25932/publishup-46016
ISSN:1866-8364
Title of parent work (German):Postprints der Universität Potsdam : Humanwissenschaftliche Reihe 618
Publication series (Volume number):Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe (618)
Publication type:Postprint
Language:English
Date of first publication:2020/04/14
Publication year:2020
Publishing institution:Universität Potsdam
Release date:2020/04/14
Tag:O2C spectrophotometer; hemoglobin amount; isometric muscle action; muscle oxygenation
Issue:618
Number of pages:11
First page:79
Last Page:87
Source:European Journal of Translational Myology, 30 (2020), 1, 79-87 DOI:10.4081/ejtm.2019.8800
Organizational units:Humanwissenschaftliche Fakultät
DDC classification:6 Technik, Medizin, angewandte Wissenschaften / 61 Medizin und Gesundheit / 610 Medizin und Gesundheit
Peer review:Referiert
Publishing method:Open Access
License (German):License LogoCC-BY-NC - Namensnennung, nicht kommerziell 4.0 International
External remark:Bibliographieeintrag der Originalveröffentlichung/Quelle
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