CORRECTED FORMULA FOR ESTIMATING PERIPHERAL-BLOOD FLOW BY IMPEDANCE PLETHYSMOGRAPHY

Authors
JINDAL GD NERURKAR SN PEDNEKAR SA BABU JP BHUTA AC DESHPANDE AK
Citation
Gd. Jindal et al., CORRECTED FORMULA FOR ESTIMATING PERIPHERAL-BLOOD FLOW BY IMPEDANCE PLETHYSMOGRAPHY, Medical & biological engineering & computing, 32(6), 1994, pp. 625-631
Citations number
16
Categorie Soggetti
Engineering, Biomedical","Computer Science Interdisciplinary Applications
Journal title
Medical & biological engineering & computing → ACNP
ISSN journal
01400118
Volume
32
Issue
6
Year of publication
1994
Pages
625 - 631
Database
ISI
SICI code
0140-0118(1994)32:6<625:CFFEPF>2.0.ZU;2-1
Abstract
In this paper, the limitations of the conventional formula for the com putation of peripheral blood flow from impedance plethysmograms are hi ghlighted, and a correction to the formula is suggested. A conductivit y cell experiment is described to show the dependence of the value of the blood flow index (BFI), obtained from the conventional formula, on the mean resistivity of the cell. It is also shown that the value of the corrected BFI is independent of the mean resistivity. Anomalies ob served in the amplitude of systolic waves in impedance plethysmograms of patients with oedema are explained.