Document Detail

Comparison of non-invasive and invasive blood pressure in aeromedical care.
MedLine Citation:
PMID:  23033983     Owner:  NLM     Status:  MEDLINE    
Blood pressure measurement is an essential physiological measurement for all critically ill patients. Previous work has shown that non-invasive blood pressure is not an accurate reflection of invasive blood pressure measurement. In a transport environment, the effects of motion and vibration may make non-invasive blood pressure less accurate. Consecutive critically ill patients transported by a dedicated aeromedical retrieval and critical care transfer service with simultaneous invasive and non-invasive blood pressure measurements were analysed. Two sets of measurements were recorded, first in a hospital environment before departure (pre-flight) and a second during aeromedical transport (in-flight). A total of 56 complete sets of data were analysed. Bland-Altman plots showed limits of agreement (precision) for pre-flight systolic blood pressure were -37.3 mmHg to 30.0 mmHg, and for pre-flight mean arterial pressure -20.5 mmHg to 25.0 mmHg. The limits of agreement for in-flight systolic blood pressure were -40.6 mmHg to 33.1 mmHg, while those for in-flight mean blood pressure in-flight were -23.6 mmHg to 24.6 mmHg. The bias for the four conditions ranged from 0.5 to -3.8 mmHg. There were no significant differences in values between pre-flight and in-flight blood pressure measurements for all categories of blood pressure measurement. Thus, our data show that non-invasive blood pressure is not a precise reflection of invasive intra-arterial blood pressure. Mean blood pressure measured non-invasively may be a better marker of invasive blood pressure than systolic blood pressure. Our data show no evidence of non-invasive blood pressures being less accurate in an aeromedical transport environment.
N McMahon; L A Hogg; A R Corfield; A D Exton
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Publication Detail:
Type:  Comparative Study; Journal Article     Date:  2012-10-03
Journal Detail:
Title:  Anaesthesia     Volume:  67     ISSN:  1365-2044     ISO Abbreviation:  Anaesthesia     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-11-07     Completed Date:  2013-01-17     Revised Date:  2013-04-22    
Medline Journal Info:
Nlm Unique ID:  0370524     Medline TA:  Anaesthesia     Country:  England    
Other Details:
Languages:  eng     Pagination:  1343-7     Citation Subset:  AIM; IM    
Copyright Information:
Anaesthesia © 2012 The Association of Anaesthetists of Great Britain and Ireland.
Emergency Medical Retrieval Service, Glasgow, UK.
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MeSH Terms
Air Ambulances*
Blood Pressure*
Blood Pressure Determination
Blood Pressure Monitors*
Critical Care / methods
Critical Illness
Monitoring, Ambulatory / instrumentation*,  methods
Reproducibility of Results
Sensitivity and Specificity
Comment In:
Anaesthesia. 2013 Feb;68(2):215-6   [PMID:  23298357 ]
Anaesthesia. 2013 Feb;68(2):214-5   [PMID:  23298356 ]
Anaesthesia. 2013 Apr;68(4):427   [PMID:  23488845 ]
Anaesthesia. 2013 Apr;68(4):427-8   [PMID:  23488844 ]

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