On-line measurement of blood water concentration in the extracorporeal circulation of hemodialysis patients

Daniel Schneditz, Allen M. Kaufman, Nathan W. Levin

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

A noninvasive measuring system to monitor blood water concentration in the extracorporeal circulation of hemodialysis patients is presented. The technique is based on the evaluation of the velocity of sound in blood. A relation between blood water concentration, sample temperature, and relative difference of sample sound velocity to water sound velocity for blood, plasma, and ultrafiltrate samples was obtained. Relative changes in blood volume were determined from the changes in blood water concentration. The applicability of the method to evaluate blood volume and hemodynamic parameters such as cardiac output was investigated. Based on the measurement of these parameters, it is concluded that a feedback system to control the ultrafiltration as well as the dialysis procedure of the hemodialysis machines can be developed.

Original languageEnglish
Title of host publicationProceedings of the Annual Conference on Engineering in Medicine and Biology
PublisherPubl by IEEE
Pages1651-1652
Number of pages2
Editionpt 4
ISBN (Print)0780302168
StatePublished - 1991
EventProceedings of the 13th Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Orlando, FL, USA
Duration: 31 Oct 19913 Nov 1991

Publication series

NameProceedings of the Annual Conference on Engineering in Medicine and Biology
Numberpt 4
Volume13
ISSN (Print)0589-1019

Conference

ConferenceProceedings of the 13th Annual International Conference of the IEEE Engineering in Medicine and Biology Society
CityOrlando, FL, USA
Period31/10/913/11/91

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