Does conductance catheter measurement system give consistent and reliable pressure-volume relations in rats

研究成果: Article同行評審

3 引文 斯高帕斯(Scopus)

摘要

The conductance catheter technique was developed in the 1980s to measure instantaneous ventricular conductance. After converting measured conductance to volume signals by use of the classic Baan conductance-to-volume equation, real-time pressurevolume (PV) relations can be obtained. A nonlinear conductance-to-volume conversion equation was proposed by Wei in 2005 to improve the accuracy of the conductance catheter system. This study tested the in vivo applicability of the nonlinear conversion equation, particularly focusing on the effect of deviation in catheter position. By altering catheter position, PV loops obtained by using the classic Baans equation and the nonlinear equation were compared. The comparison results show that the nonlinear equation indeed compensates for the errors introduced by catheter position deviation, and gives more consistent and reliable PV relations. Moreover, the effect of variations in blood resistivity was analyzed. To obtain consistent and reliable PV relations, the nonlinear equation is suggested for use, and changes in blood resistivity should be carefully monitored.

原文English
文章編號5719160
頁(從 - 到)1804-1813
頁數10
期刊IEEE Transactions on Biomedical Engineering
58
發行號6
DOIs
出版狀態Published - 2011 六月

All Science Journal Classification (ASJC) codes

  • Biomedical Engineering

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