Decreased circulation time in the upper limb reduces the lag time of the finger pulse oximeter response
Authors:
- 1 January 1992
- journal article
- Published by Springer Nature in Canadian Journal of Anesthesia/Journal canadien d'anesthésie
- Vol. 39 (1) , 87-89
Abstract
To observe the influence of circulatory changes on the lag time of the pulse oximeter response, eight healthy patients scheduled for hand surgery were studied. After breath holding, the patients took a breath of oxygen and the time to an increase in SpO2 was measured before and after axillary brachial plexus block. It was found that the lag time with finger probe decreased from 28.6 ±7.1 sec to 15.8 ± 1.1 sec (mean ± SD) following brachial block (P < 0.01), There was no change in arterial blood pressure. The results suggest that the lag time of the finger pulse oximeter response is primarily determined by blood flow. Afin d’observer l’influence des changements circulatoires sur le temps de réponse du saturomètre, huit patients en santé devant subir une chirurgie de la main ont été étudiés. Après avoir retenu leur respiration, les patients ont pris une respiration sous oxygène et le temps d’attente jusqu’à l’observation d’une augmentation de la SpO2 a été mesuré avant et après le bloc du plexus axillaire. Il a été noté que le temps de réponse avec la pièce digitale diminuait (P < 0,01) de 28,6 ± 7,1 sec à 15,8 ±1,1 sec (moyenne ± ET) après le bloc axillaire. Il n’y avait aucun changement de la tension artérielle. Ces résultats suggèrent que le temps de réponse de la pièce digitale du saturomètre est principalement déterminé par le débit sanguin.Keywords
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