Document Detail


A new probe for ankle systolic pressure measurement using photoplethysmography (PPG).
MedLine Citation:
PMID:  15771277     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
An automated method for ankle systolic pressure measurement, less operator dependent than the standard continuous wave (CW) Doppler technique, would imply an advantage both in patient measurements and in epidemiological studies. We present a new photoplethysmographic (PPG) probe that uses near-infrared light (880 nm) to detect pulsatory blood flow underneath the distal end of a standard pneumatic cuff. The probe is adapted to the anatomical conditions at the ankle, permitting recording of pressures in both ankle arteries separately. The validity of the equipment was tested with CW Doppler-derived systolic pressures and invasive blood pressure measurements for reference. In 20 healthy subjects, visual analysis of the PPG curves revealed a mean difference between CW Doppler and PPG measurements of -0.5 mmHg (SD 6.9). Corresponding results for the anterior and posterior tibial arteries separately were -1.8 mmHg (SD 6.2) and 0.9 mmHg (SD 7.3), respectively. A correct probe position was essential for the results. In direct recordings from the dorsalis pedis artery in 10 intensive care patients, PPG underestimated systolic pressure in the anterior tibial artery by 4.5 mmHg (SD 12.1). With further development, the PPG probe, integrated in the pneumatic cuff, may simplify measurements of ankle systolic pressures.
Authors:
B Jönsson; C Laurent; T Skau; L G Lindberg
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Publication Detail:
Type:  Clinical Trial; Comparative Study; Controlled Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't; Validation Studies    
Journal Detail:
Title:  Annals of biomedical engineering     Volume:  33     ISSN:  0090-6964     ISO Abbreviation:  Ann Biomed Eng     Publication Date:  2005 Feb 
Date Detail:
Created Date:  2005-03-17     Completed Date:  2005-07-19     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0361512     Medline TA:  Ann Biomed Eng     Country:  United States    
Other Details:
Languages:  eng     Pagination:  232-9     Citation Subset:  IM    
Affiliation:
Department of Cardiovascular Surgery and Anesthesia, University Hospital, Linköping, Sweden. bjorn.jonsson@lio.se
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Aged
Aged, 80 and over
Ankle / blood supply*,  physiopathology*
Blood Pressure / physiology*
Equipment Design
Equipment Failure Analysis
Female
Humans
Male
Middle Aged
Photoplethysmography / instrumentation*,  methods
Reproducibility of Results
Sensitivity and Specificity
Transducers*

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


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