Document Detail


Do the Finapres and Colin radial artery tonometer measure the same blood pressure changes following deflation of thigh cuffs?
MedLine Citation:
PMID:  14509303     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
A A Birch; S L Morris
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Physiological measurement     Volume:  24     ISSN:  0967-3334     ISO Abbreviation:  Physiol Meas     Publication Date:  2003 Aug 
Date Detail:
Created Date:  2003-09-25     Completed Date:  2004-04-28     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9306921     Medline TA:  Physiol Meas     Country:  England    
Other Details:
Languages:  eng     Pagination:  653-60     Citation Subset:  IM    
Affiliation:
Department of Medical Physics and Bioengineering, Mailpoint 29, Southampton General Hospital, Tremona Road, Southampton SO16 6YD, UK. tony.birch@suht.swest.nhs.uk
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MeSH Terms
Descriptor/Qualifier:
Blood Pressure / physiology*
Blood Pressure Determination / methods*,  standards
Blood Pressure Monitors
Cerebrovascular Circulation / physiology*
Homeostasis / physiology
Humans
Pulsatile Flow / physiology
Radial Artery / physiology*
Reproducibility of Results
Thigh / blood supply*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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