Document Detail

Coefficient-Free Blood Pressure Estimation Based on Pulse Transit Time-Cuff Pressure Dependence.
MedLine Citation:
PMID:  23372068     Owner:  NLM     Status:  Publisher    
Oscillometry is a popular technique for automatic estimation of blood pressure (BP). However, most of the oscillometric algorithms rely on empirical coefficients for systolic and diastolic pressure evaluation that may differ in various patient populations, rendering the technique unreliable. A promising complementary technique for automatic estimation of BP, based on the dependence of pulse transit time (PTT) on cuff pressure (CP) (PTTCP mapping), has been proposed in the literature. However, a theoretical grounding for this technique and a nonparametric BP estimation approach are still missing. In this paper, we propose a novel coefficient-free BP estimation method based on PTTCP dependence. PTT is mathematically modeled as a function of arterial lumen area under the cuff. It is then analytically shown that PTTCP mappings computed from various points on the arterial pulses can be used to directly estimate systolic, diastolic, and mean arterial pressure without empirical coefficients. Analytical results are cross-validated with a pilot investigation on 10 healthy subjects where 150 simultaneous ECG and oscillometric BP recordings are analyzed. The results are encouraging whereby the mean absolute errors of the proposed method in estimating systolic and diastolic pressures are 5.31 mmHg and 4.51 mmHg, respectively, relative to the Food and Drug Administration (FDA)-approved Omron monitor. Our work thus shows promise towards providing robust and objective BP estimation in a variety of patients and monitoring situations.
M Forouzanfar; S Ahmad; I Batkin; H Dajani; V Groza; M Bolic
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-28
Journal Detail:
Title:  IEEE transactions on bio-medical engineering     Volume:  -     ISSN:  1558-2531     ISO Abbreviation:  IEEE Trans Biomed Eng     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-2-1     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0012737     Medline TA:  IEEE Trans Biomed Eng     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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