The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 26, 1998
Filed:
Dec. 26, 1996
Applicant:
Inventors:
Koichi Itoigawa, Aichi, JP;
Hitoshi Iwata, Aichi, JP;
Assignee:
Kabushiki Kaisha Tokai Rika Denki Seisakusho, Aichi-Ken, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61B / ;
U.S. Cl.
CPC ...
600488 ; 600485 ; 600561 ;
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.