Document Detail

Influence of arrhythmias on accuracy of non-invasive blood pressure monitors.
MedLine Citation:
PMID:  9717605     Owner:  NLM     Status:  MEDLINE    
PURPOSE: To compare the accuracy of non-invasive blood pressure (NIBP) monitors in response to common cardiac arrhythmias. METHODS: Simulated signals of normal sinus rhythm (NSR), premature ventricular contractions (PVCs), atrial fibrillation (AF) and missed beats (MB) were generated from a Cufflink (Dynatech Nevada) NIBP simulator. Using these signals, the Critikon 1846SX (C1846), Critikon 845xt (C845). Critikon Vital Signs (CVIT), and Hewlett Packard M1008a (HP1008) were studied at a standard dynamic blood pressure of 120/90/80 mmHg, in order to compare monitor accuracy and signal response times. RESULTS: The C845 monitors most closely estimated a simulated SBP of 120 mmHg, although SBP was greater during PVCs and AF than NSR (P < 0.05). The Critikon 1846, Critikon Vital Signs, and Hewlett Packard systematically underestimated SBP during these arrhythmias, but variability was modest, as reflected by small coefficients of variation (< 2% for SBP) with all monitor types. In general, MAP and DBP were less sensitive to the effects of these arrhythmias. Finally, missed beats prolonged signal response times with all four monitor types (P < 0.05), whereas PVCs and AF did not alter this parameter. CONCLUSIONS: This study demonstrates the extent to which the accuracy of NIBP monitors is altered by common cardiac arrhythmias. Differences in the electromechanical characteristics of these devices may help to explain the observed similarities and discrepancies.
M J Cleland; B Pham; D R Miller
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Canadian journal of anaesthesia = Journal canadien d'anesthésie     Volume:  45     ISSN:  0832-610X     ISO Abbreviation:  Can J Anaesth     Publication Date:  1998 Jul 
Date Detail:
Created Date:  1998-11-24     Completed Date:  1998-11-24     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  8701709     Medline TA:  Can J Anaesth     Country:  CANADA    
Other Details:
Languages:  eng     Pagination:  699-705     Citation Subset:  IM    
Department of Biomedical Engineering, Ottawa General Hospital, Ontario, Canada.
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MeSH Terms
Arrhythmias, Cardiac / physiopathology*
Atrial Fibrillation / physiopathology
Blood Pressure / physiology*
Blood Pressure Monitors*
Computer Simulation
Ventricular Premature Complexes / physiopathology

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

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