Document Detail

Precision and accuracy of a new device (CNAPTM) for continuous non-invasive arterial pressure monitoring: assessment during general anaesthesia.
MedLine Citation:
PMID:  20627878     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Continuous non-invasive arterial pressure measured with CNAP (CNAP) has been shown to be superior to intermittent oscillometric measurements during procedural sedation and spinal anaesthesia. We assessed the performance of CNAP during general anaesthesia by analysis of agreement with invasive measurements of arterial pressure (AP). METHODS: Eighty-eight patients undergoing elective abdominal surgery, cardio-, or neurosurgery were included in the study. Systolic, diastolic, and mean AP measured by an intra-arterial catheter in the radial artery (IAP) were compared with those obtained by CNAP from the same arm. Data were analysed to determine the precision (i.e. measurement error) and accuracy (i.e. systematic error) of beat-to-beat CNAP values with respect to IAP. Also, we compared the frequency of fast changes in AP (FCAP) and hypotension (IOH) by both methods. RESULTS: CNAP precision of 4.5, 3.1, and 3.2 mm Hg (systolic, diastolic, and mean AP, respectively) was not significantly different from IAP precision, and CNAP accuracy was +6.7, -5.6, and -1.6 mm Hg. The frequency of AP pairs having a difference within the calculated limits of agreement was 81%, 64%, and 76% for systolic, diastolic, and mean AP, respectively. The calculated limits of agreement were +/-17.6, +/-11.4, and +/-12.0 mm, Hg, respectively. CNAP and IAP detected simultaneously to 82.1% FCAP and to 84.6% IOH. CONCLUSIONS: CNAP provides real-time estimates of arterial pressure comparable with those generated by an invasive intra-arterial catheter system during general anaesthesia.
C Jeleazcov; L Krajinovic; T Münster; T Birkholz; R Fried; J Schüttler; J Fechner
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Publication Detail:
Type:  Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-07-13
Journal Detail:
Title:  British journal of anaesthesia     Volume:  105     ISSN:  1471-6771     ISO Abbreviation:  Br J Anaesth     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-08-18     Completed Date:  2010-10-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0372541     Medline TA:  Br J Anaesth     Country:  England    
Other Details:
Languages:  eng     Pagination:  264-72     Citation Subset:  IM    
Department of Anesthesiology, University of Erlangen-Nuremberg, Erlangen, Germany.
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MeSH Terms
Aged, 80 and over
Anesthesia, General*
Blood Pressure
Blood Pressure Determination / instrumentation,  methods
Blood Pressure Monitors*
Middle Aged
Monitoring, Intraoperative / instrumentation*,  methods
Oscillometry / methods
Prospective Studies
Radial Artery / physiology
Reproducibility of Results
Signal Processing, Computer-Assisted

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

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