Surgery – Diagnostic testing – Cardiovascular
Patent
1996-12-26
1998-05-26
Bahr, Jennifer
Surgery
Diagnostic testing
Cardiovascular
600485, 600561, A61B 502
Patent
active
057556687
ABSTRACT:
A catheter provided with a catheter tube that is inserted into a human body. A sensor detects pressure acting on a distal end of the catheter tube when inserted into the human body and outputs an output signal indicating fluctuations of the pressure. A CPU judges whether the waveform of the output signal contains a regular component and an irregular component and separates the output signal into a regular component and an irregular component based on the judgment. Based on the separated irregular component, a judgment is made as to whether an obstruction is present within an insertion path of the catheter.
REFERENCES:
patent: 4722648 (1988-02-01), Ligtenberg
patent: 4809704 (1989-03-01), Sogawa
patent: 5178153 (1993-01-01), Einzig
patent: 5526820 (1996-06-01), Khoury
patent: 5564425 (1996-10-01), Tonokura
Itoigawa Koichi
Iwata Hitoshi
Bahr Jennifer
Gibson Roy
Kabushiki Kaisha Tokai Rika Denki Seisakusho
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