Title:
PRESSURE SENSOR FOR EXTRACORPOREAL CIRCULATING CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2007/123156
Kind Code:
A1
Abstract:
A pressure sensor (1) for an extracorporeal circulating circuit comprising
a liquid chamber (6), a pressure measuring means (7), and a liquid flow path (8);
wherein the liquid chamber (6) comprises a reference surface (10) not deformed
by a pressure in the extracorporeal circulating circuit, a deforming surface
(20) disposed separated from the reference surface (10) and deformed at least
partially by a pressure in the extracorporeal circulating circuit, a first connection
surface (11) that joins the deforming surface (20) with the reference surface
(10) to form a closed liquid-tight space inside them and is not deformed by a pressure
in the extracorporeal circulating circuit, a liquid inflowing port (40) provided
in the side surface of the first connection surface (11), and a liquid outflowing
port (41) disposed away by ½ to less than one round from the inflowing port
(40) in the flowing direction of liquid introduced along the inner periphery
of the side surface of the first connection surface (11); the pressure measuring
means (7) measures the deformation amount of the deforming surface (20), and
is disposed outside the liquid chamber (6); and the liquid flow path (8) is liquid-tightly
connected with the liquid inflowing port (40) so that liquid to be introduced
into the liquid chamber (6) flows in along the inner periphery of the side surface
of the first connection surface (11).
Inventors:
KOUDA, Masaaki (1-2 Yurakucho 1-chome, Chiyoda-k, Tokyo 40, 1008440, JP)
幸田 真明 (〒40 東京都千代田区有楽町一丁目１番２号 旭化成株式会社内 Tokyo, 1008440, JP)
幸田 真明 (〒40 東京都千代田区有楽町一丁目１番２号 旭化成株式会社内 Tokyo, 1008440, JP)
Application Number:
JP2007/058446
Publication Date:
November 01, 2007
Filing Date:
April 18, 2007
Export Citation:
Assignee:
ASAHI KASEI MEDICAL CO., LTD. (9-1 Kandamitoshirocho, Chiyoda-ku Tokyo, 82, 1018482, JP)
旭化成メディカル株式会社 (〒82 東京都千代田区神田美土代町９番地１ Tokyo, 1018482, JP)
KOUDA, Masaaki (1-2 Yurakucho 1-chome, Chiyoda-k, Tokyo 40, 1008440, JP)
旭化成メディカル株式会社 (〒82 東京都千代田区神田美土代町９番地１ Tokyo, 1018482, JP)
KOUDA, Masaaki (1-2 Yurakucho 1-chome, Chiyoda-k, Tokyo 40, 1008440, JP)
International Classes:
G01L19/00; A61M1/14
Attorney, Agent or Firm:
ASAMURA, Kiyoshi et al. (Room 331, New Ohtemachi Bldg.2-1, Ohtemachi 2-chome,Chiyoda-k, Tokyo 04, 1000004, JP)
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