PLURAL-PARAMETER CATHETER AND PARAMETER MEASURING INSTRUMENT

摘要

PROBLEM TO BE SOLVED: To apply a diphasic membrane to the outside wall of a catheter having plural parameter sensors. SOLUTION: At least part of the wall in the chamber of the plural-parameter catheter 1 for measuring the plural parameters in an organism in the patient's blood having a long extending tube having a front end hollow chamber 5 possessing a front end 3 in-vivo is delineated by the diphasic membrane. The diphasic membrane consists of a layer of a microporous hydrophobic material having the micropores filled with a hydrophilic material. The hydrophilic material forms a gel to provide the passages of the ions bonded with water when hydrated. The chamber has plural sensors 7, 8, 9, 10 successively mounted from the front end.