Physiological influences on continuous finger and simultaneous intra-arterial blood pressure

Lal, SKL; Henderson, RJ; Cejnar, M; Hart, MG; Hunyor, SN

Physiological influences on continuous finger and simultaneous intra-arterial blood pressure

Lal, SKL

Henderson, RJ Cejnar, M Hart, MG Hunyor, SN

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Publication Type:: Journal Article
Citation:: Hypertension, 1995, 26 (2), pp. 307 - 314
Issue Date:: 1995-01-01

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Field	Value	Language
dc.contributor.author	Lal, SKL https://orcid.org/0000-0002-0911-0850	en_US
dc.contributor.author	Henderson, RJ	en_US
dc.contributor.author	Cejnar, M	en_US
dc.contributor.author	Hart, MG	en_US
dc.contributor.author	Hunyor, SN	en_US
dc.date.issued	1995-01-01	en_US
dc.identifier.citation	Hypertension, 1995, 26 (2), pp. 307 - 314	en_US
dc.identifier.issn	0194-911X	en_US
dc.identifier.uri	http://hdl.handle.net/10453/15645
dc.description.abstract	Because of the clinical and experimental utility of continuous finger blood pressure measurements and the need for accuracy, we tested the performance of a new hydraulic device in 22 consecutive hypertensive subjects during physiological and pharmacological interventions. Ipsilateral brachial intra-arterial pressure was monitored during rest, Valsalva's maneuver, static handgrip, and mental arithmetic and after sublingual glyceryl trinitrate. In excess of 40 000 blood pressure values were analyzed. Average bias (intra-arterial minus finger blood pressure) was 8.2±17.0 mm Hg (mean±SD, P=NS) for systolic and 2.8±10.4 mm Hg (P=NS) for diastolic pressure. Two-way ANOVA of biases with subject and task factors showed a subject effect (P<.001). Intersubject and intrasubject standard deviations of bias were 13.8 and 9.8 mm Hg systolic and 8.7 and 5.7 diastolic, respectively. Linear drift (millimeters of mercury per minute) of finger pressure was greater (P<.001) for systolic than diastolic pressure during static exercise and math and after glyceryl trinitrate. Coefficients of determination for blood pressure ranged from 0.4±0.3 to 0.8±0.3 during the tasks. We conclude that (1) noninvasive finger blood pressure faithfully follows intra-arterial changes but with clinically relevant offsets, (2) this technique is best suited for assessing pressure changes, (3) physiological and pharmacological interventions do not consistently affect finger pressure accuracy, (4) many reports of finger blood pressure measuring devices are based on direct readings obtained with inadequate system response characteristics, and (5) the tested instrument falls short of the standards requirements (bias ≤5±8 mm Hg) for devices that measure intermittently.	en_US
dc.relation.ispartof	Hypertension	en_US
dc.relation.isbasedon	10.1161/01.HYP.26.2.307	en_US
dc.subject.classification	Cardiovascular System & Hematology	en_US
dc.subject.mesh	Fingers	en_US
dc.subject.mesh	Arteries	en_US
dc.subject.mesh	Humans	en_US
dc.subject.mesh	Observer Variation	en_US
dc.subject.mesh	Blood Pressure Determination	en_US
dc.subject.mesh	Valsalva Maneuver	en_US
dc.subject.mesh	Blood Pressure	en_US
dc.subject.mesh	Aged	en_US
dc.subject.mesh	Middle Aged	en_US
dc.subject.mesh	Male	en_US
dc.title	Physiological influences on continuous finger and simultaneous intra-arterial blood pressure	en_US
dc.type	Journal Article
utslib.citation.volume	2	en_US
utslib.citation.volume	26	en_US
utslib.for	1103 Clinical Sciences	en_US
utslib.for	1102 Cardiorespiratory Medicine and Haematology	en_US
utslib.for	1117 Public Health and Health Services	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Life Sciences
pubs.organisational-group	/University of Technology Sydney/Strength - CHT - Health Technologies
utslib.copyright.status	closed_access
pubs.issue	2	en_US
pubs.publication-status	Published	en_US
pubs.volume	26	en_US

Abstract:

Because of the clinical and experimental utility of continuous finger blood pressure measurements and the need for accuracy, we tested the performance of a new hydraulic device in 22 consecutive hypertensive subjects during physiological and pharmacological interventions. Ipsilateral brachial intra-arterial pressure was monitored during rest, Valsalva's maneuver, static handgrip, and mental arithmetic and after sublingual glyceryl trinitrate. In excess of 40 000 blood pressure values were analyzed. Average bias (intra-arterial minus finger blood pressure) was 8.2±17.0 mm Hg (mean±SD, P=NS) for systolic and 2.8±10.4 mm Hg (P=NS) for diastolic pressure. Two-way ANOVA of biases with subject and task factors showed a subject effect (P<.001). Intersubject and intrasubject standard deviations of bias were 13.8 and 9.8 mm Hg systolic and 8.7 and 5.7 diastolic, respectively. Linear drift (millimeters of mercury per minute) of finger pressure was greater (P<.001) for systolic than diastolic pressure during static exercise and math and after glyceryl trinitrate. Coefficients of determination for blood pressure ranged from 0.4±0.3 to 0.8±0.3 during the tasks. We conclude that (1) noninvasive finger blood pressure faithfully follows intra-arterial changes but with clinically relevant offsets, (2) this technique is best suited for assessing pressure changes, (3) physiological and pharmacological interventions do not consistently affect finger pressure accuracy, (4) many reports of finger blood pressure measuring devices are based on direct readings obtained with inadequate system response characteristics, and (5) the tested instrument falls short of the standards requirements (bias ≤5±8 mm Hg) for devices that measure intermittently.

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http://hdl.handle.net/10453/15645