Abstract:
:Near-infrared finger photoplethysmograms were recorded and double-normalized pulse volumes (DNPV = DeltaV(b)/V(b); V(b) = total blood volume in the fingertip, DeltaV(b) = pulsatile component of V(b)) were calculated in ten subjects during, immersion of the contralateral hand in water at three different temperatures (44 degrees C, 22 degrees C, 11 degrees C). The DNPV from the left finger was compared beat-by-beat with cutaneous vascular resistance (CVR) derived by dividing mean blood pressure of the left third finger by cutaneous blood flow of the left fourth finger. The correlations overall at the three temperatures between log DNPV(LF) and log CVR(LF) (LF, low frequency component of DNPV and CVR) ranged from -0.89 to -0.96 among the subjects. After adjusting for a maximal extension of the vascular wall (DNPV(max)), the correlations became stronger. It was concluded that DNPV was a reliable and valid indicator of vascular tone in the finger.
journal_name
Eur J Appl Physioljournal_title
European journal of applied physiologyauthors
Tanaka G,Sawada Y,Yamakoshi Kdoi
10.1007/PL00013788keywords:
subject
Has Abstractpub_date
2000-01-01 00:00:00pages
148-54issue
1-2eissn
1439-6319issn
1439-6327pii
00810148.421journal_volume
81pub_type
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journal_title:European journal of applied physiology
pub_type: 杂志文章
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更新日期:2000-05-01 00:00:00
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