Effect of periphral vessel congestion on diastolic blood pressure measurements with auscultatory method

Open Access
Publisher Website
Google Scholar
Abstract
The venous pressure distal to the cuff began to increase soon after the cuff pressure decreased up to the intra-arterial systolic pressure and reached the maximum level. Then arterial pressure distal to the cuff increased above the venous pressure. When the venous pressure distal to the cuff and the cuff pressure balanced, the venous under the cuff opened and the return flow of the venous restarted. After that the venous pressure followed by the cuff pressure. In this case, the maximum level of the venous pressure exceeded the intra-arterial diastolic pressure. Korotkoff sounds disappeared a few seconds before the cuff pressure decreased up to the intra-arterial diastolic pressure. In contrast, Korotkoff sounds disappeared just when the cuff pressure reached the intra-arterial diastolic pressure during deflation at a rate of 5.5 mmHg/sec. These results suggest that diastolic auscultatory blood pressure is overestimated because of forearm congestion and elevation in peripheral artery and venous pressure on the side where a cuff is wrapped, especially during cuff deflation at a slow rate.

This publication has 0 references indexed in Scilit: