Pulmonary O2 diffusing capacity at exercise by a modified rebreathing method
Deutscher übersetzter Titel: | Lungendiffusionskapazität für O2 bei körperlicher Belastung mit einer modifizierten Rückatmungsmethode gemessen |
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Autor: | Veicsteinas, A.; Magnussen, H.; Meyer, M.; Cerretelli, P. |
Erschienen in: | European journal of applied physiology |
Veröffentlicht: | 35 (1976), 1, S. 79-88, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource Elektronische Ressource (online) |
Sprache: | Englisch |
ISSN: | 1439-6319, 0301-5548 |
DOI: | 10.1007/BF00444659 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU197800024120 |
Quelle: | BISp |
Abstract des Autors
The rebreathing technique for the measurement of the pulmonary O2 diffusing capacity, DO2, previously developed for resting conditions (Cerretelli et al., J. appl. Physiol. 37, 526 -532 (1974) has been modified for application to exercise and simplified to one rebreathing maneuver only. The changes consist: 1) in administering in the course of a normoxic exercise a priming breath of an O2 free mixture just before the onset of rebreathing in order to achieve rapidly the appropriate starting PO2 values on the linear part of the O2 dissociation curve as required by the method; 2) in calculating mixed venous blood O2 tension by extrapolation of the alveolar to mixed venous blood PO2 equilibration curve, instead of determining it separately. While the mean Do2 value of 21 measurements on 5 subjects at rest was 30 ml/min. Torr - 1 3 (S.E.), in 2 subjects exercising on a bicycle ergometer, DO2 was found to increase from a restingvalue of about 32 ml/min/Torr to 107 ml/min/Torr for an eightfold increase of O2 uptake. The validity and the applicability of the method are critically discussed.