Title:	The effect of wrist cuff width on oscillometric blood pressure waveforms
Authors:	Jílek, Jiří Štork, Milan
Citation:	Electroscope. 2008, č. 3.
Issue Date:	2008
Publisher:	Západočeská univerzita v Plzni, Fakulta elektrotechnická
Document type:	článek article
URI:	http://147.228.94.30/images/PDF/Rocnik2008/cislo3_2008/r2c3c1.pdf http://hdl.handle.net/11025/457
ISSN:	1802-4564
Keywords:	měření krevního tlaku;šířka manžety;oscilometrická metoda
Keywords in different language:	oscilometric method;wrist cuff width;blood pressure measurement
Abstract in different language:	Accuracy of blood pressure (BP) measurement with any method is affected by cuff size. Narrow cuff overestimates BP and wide cuff underestimates BP. Wrist cuff oscillometric BP monitors typically use narrow cuffs with bladders about 6 cm wide. The segment of the radial artery compressed by the wrist cuff presents a hydraulic resistance (Rc) to blood flow during BP measurement. Narrow cuff presents smaller Rc than wide cuff. Changes in Rc alter the amplitude envelope of oscillometric waveforms. Narrow cuff allows blood flow under the cuff and into the hand sooner than wide cuff. The objective of this study was to demonstrate that narrow cuff alters the amplitude envelope in a manner that results in increased BP values when characteristic ratio algorithm is used. A specialized experimental system was used to acquire wrist oscillometric BP data from a narrow (6 cm) cuff and from a wide (10 cm) cuff. Data were acquired from 10 volunteers in sitting position. The results confirmed the objective of the study. All narrow cuff BPs were higher than either the reference BPs or wide cuff BPs. Wide cuff algorithmic BPs were similar to the reference BPs. Wider wrist cuffs appear to be desirable for improved accuracy and reliability of wrist BP monitors.
Rights:	Copyright © 2007-2010 Electroscope. All Rights Reserved.
Appears in Collections:	Číslo 3 (2008) Články / Articles (KAE) Číslo 3 (2008)

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