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Do the Finapres and Colin radial artery tonometer measure the same blood pressure changes following deflation of thigh cuffs?

Do the Finapres and Colin radial artery tonometer measure the same blood pressure changes following deflation of thigh cuffs?
Do the Finapres and Colin radial artery tonometer measure the same blood pressure changes following deflation of thigh cuffs?

The objective of this work was to determine if systematic differences exist between blood pressure time series measured by two non-invasive techniques. Cerebral blood flow autoregulation is often measured while a change in blood pressure is induced by deflation of thigh cuffs. To interpret the result a continuous measurement of arterial blood pressure is required. The Finapres is a non-invasive blood pressure monitor that is often used when assessing autoregulation but there is uncertainty about its reliability. A more recent device, the Colin tonometer, uses radial artery tonometry, which may prove to be a more reliable non-invasive method of obtaining a blood pressure waveform. Twenty healthy volunteers were recruited; blood pressure trends following cuff deflation were measured simultaneously with a Finapres and a Colin tonometer. A significant difference was found between the blood pressure waveforms measured with the two devices. The most striking difference was a slower recovery time measured with the Finapres (Wilcoxon signed rank test P < 0.001). Peripheral vasoaction may be distorting the measurement of blood pressure by the Finapres. This would account for the difference that exists between the techniques. Comparison with a direct arterial line would confirm which non-invasive measurement is more accurate.

Blood Pressure, Blood Pressure Determination, Blood Pressure Monitors, Cerebrovascular Circulation, Homeostasis, Humans, Pulsatile Flow, Radial Artery, Reproducibility of Results, Thigh, Comparative Study, Journal Article
0967-3334
653-660
Birch, A.A.
755f2236-4c0c-49b5-9884-de4021acd42d
Morris, S L
08253674-2438-42e3-b27d-fd0514ef5caa
Birch, A.A.
755f2236-4c0c-49b5-9884-de4021acd42d
Morris, S L
08253674-2438-42e3-b27d-fd0514ef5caa

Birch, A.A. and Morris, S L (2003) Do the Finapres and Colin radial artery tonometer measure the same blood pressure changes following deflation of thigh cuffs? Physiological Measurement, 24 (3), 653-660. (doi:10.1088/0967-3334/24/3/302).

Record type: Article

Abstract

The objective of this work was to determine if systematic differences exist between blood pressure time series measured by two non-invasive techniques. Cerebral blood flow autoregulation is often measured while a change in blood pressure is induced by deflation of thigh cuffs. To interpret the result a continuous measurement of arterial blood pressure is required. The Finapres is a non-invasive blood pressure monitor that is often used when assessing autoregulation but there is uncertainty about its reliability. A more recent device, the Colin tonometer, uses radial artery tonometry, which may prove to be a more reliable non-invasive method of obtaining a blood pressure waveform. Twenty healthy volunteers were recruited; blood pressure trends following cuff deflation were measured simultaneously with a Finapres and a Colin tonometer. A significant difference was found between the blood pressure waveforms measured with the two devices. The most striking difference was a slower recovery time measured with the Finapres (Wilcoxon signed rank test P < 0.001). Peripheral vasoaction may be distorting the measurement of blood pressure by the Finapres. This would account for the difference that exists between the techniques. Comparison with a direct arterial line would confirm which non-invasive measurement is more accurate.

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e-pub ahead of print date: 19 May 2003
Published date: August 2003
Keywords: Blood Pressure, Blood Pressure Determination, Blood Pressure Monitors, Cerebrovascular Circulation, Homeostasis, Humans, Pulsatile Flow, Radial Artery, Reproducibility of Results, Thigh, Comparative Study, Journal Article

Identifiers

Local EPrints ID: 427483
URI: https://eprints.soton.ac.uk/id/eprint/427483
ISSN: 0967-3334
PURE UUID: b30d0463-9270-428e-98ef-b9dcb91da0b3
ORCID for A.A. Birch: ORCID iD orcid.org/0000-0002-2328-702X

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Date deposited: 21 Jan 2019 17:30
Last modified: 20 Jul 2019 00:23

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Author: A.A. Birch ORCID iD
Author: S L Morris

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