2024-03-29T07:39:07Z
https://niigata-u.repo.nii.ac.jp/oai
oai:niigata-u.repo.nii.ac.jp:00001956
2022-12-15T03:34:48Z
423:424:425
453:454
Automatic Correction of Left-Ventricular Pressure Waveform Using the Natural Observation Method
Automatic Correction of Left-Ventricular Pressure Waveform Using the Natural Observation Method
Hori, Jun-ichi
6379
Saitoh, Yoshiaki
6380
Kiryu, Tohru
6381
Iijima, Taizo
6382
automatic correction
natural observation method
catheter manometer system
left-ventricular pressure waveform
lushing device
The pressure waveforms indicated on a catheter manometer system are subject to serious distortion due to the resonance of the catheter itself, or the compliance of a particular transducer. Although several methods have been proposed for improving those characteristics, they have never been put into practice. We have focused on the transfer function of the catheter manometer, and made a pilot system, using the natural observation method. This method has been suggested as a means of studying the structure of the instantaneous waveform. In this manner, we were able to increase the bandwidth in the frequency domain and reduce the ringing in the time domain. Correction was performed automatically, using a step wave. Reproduction bf the waveform with a flushing device, was a task of equal simplicity, that allowed us to estimate the system parameters so that the response waveform became step-like. In the experiment, our system provided distortion-free left-ventricular pressure waveform measurements and exact evaluation of the cardiac pumping system. The values obtained came much closer to the original figures arrived at by the catheter-tip manometer system.
journal article
電子情報通信学会
1992-11
application/pdf
IEICE transactions on information and systems
6
E75-D
909
915
IEICE transactions on information and systems
AA10826272
09168532
https://niigata-u.repo.nii.ac.jp/record/1956/files/E75-D_6_909-915.pdf
eng
http://www.ieice.org/jpn/trans_online/
copyright@1992 IEICE