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Direct measurement of capillary blood pressure in the human lipIn this study, we developed and tested a new procedure for measuring microcirculatory blood pressures above heart level in humans. Capillary and postcapillary venule blood pressures were measured directly in 13 human subjects by use of the servonulling micropressure technique adapted for micropuncture of lip capillaries. Pressure waveforms were recorded in 40 separate capillary vessels and 14 separate postcapillary venules over periods ranging from 5 to 64 s. Localization and determination of capillary and postcapillary vessels were ascertained anatomically before pressure measurements. Capillary pressure was 33.2 +/- 1.5 (SE) mm Hg in lips of subjects seated upright. Repeated micropunctures of the same vessel gave an average coefficient of variation of 0.072. Postcapillary venule pressure was 18.9 +/- 1.6 mm Hg. This procedure produces a direct and reproducible means of measuring microvascular blood pressures in a vascular bed above heart level in humans.
Document ID
19930056553
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Parazynski, S. E.
(NASA Ames Research Center Moffett Field, CA, United States)
Tucker, B. J.
(NASA Ames Research Center Moffett Field, CA, United States)
Aratow, M.
(NASA Ames Research Center Moffett Field, CA, United States)
Crenshaw, A.
(NASA Ames Research Center Moffett Field, CA, United States)
Hargens, A. R.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 16, 2013
Publication Date
February 1, 1993
Publication Information
Publication: Journal of Applied Physiology
Volume: 74
Issue: 2
ISSN: 8750-7587
Subject Category
Aerospace Medicine
Accession Number
93A40550
Distribution Limits
Public
Copyright
Other

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