Ph-measuring device used in an endoscope

• US 3,888,237 A
• Filed: 10/15/1973
• Issued: 06/10/1975
• Est. Priority Date: 10/15/1973
• Status: Expired due to Term

• Current Assignee: Toshiyuki Mori
• Original Assignee: Toshiyuki Mori
• Inventors: Mori, Toshiyuki
• Primary Examiner(s): Howell, Kyle L.
• Application Number:
  US05/406,292
• Time in Patent Office: 603 Days
• Field of Search: 128/2E,2.1E,6,8 204/195B,195G
• US Class Current: 600/350
• CPC Class Codes: A61B 1/00098 Deflecting means for inserted tools
• CPC Class Codes: A61B 1/00165 with light-conductive means, e.g. fibre optics A61B1/07 takes precedence
• CPC Class Codes: A61B 1/00177 for 90 degrees side-viewing
• CPC Class Codes: A61B 1/018 for receiving instruments
• CPC Class Codes: A61B 1/2736 Gastroscopes
• CPC Class Codes: A61B 5/14539 for measuring pH

Abstract

In an endoscope provided with a channel permitting the passage of forceps, a device to measure the PH of an abdominal liquid which comprises a glass electrode brought into contact with an abdominal liquid to measure its PH; a thin flexible tube fitted at one end to the glass electrode to bring said electrode to the desired abdominal liquid whose PH is to be measured and a lead having one end connected to the glass electrode and the opposite end extended to the outside through the flexible tube.

Claims

1. In an endoscope provided with an elongated forceps channel (22), a PH-measuring device (10) comprising:

an elongated flexible tubular member (16) including an elongated flexible tube (18) and an elongated flexible tubular metal coil (17) extending along and in the flexible tube (18), said tubular member (16) being inserted into the elongated forceps channel (22) and extendable at one end into a body cavity;

a glass electrode (11) coupled to said one end of the elongated tubular metal coil (17) so as to be extendable into a body cavity and adapted to contact with matter in said body to indicate a potential corresponding to the PH of said body matter which is to be examined; and

an elongated electrical lead (20) passing through said elongated tubular metal coil (17) and connected at one end to the glass electrode (11) and at the other end adapted to be connected to an external potential measuring device through the flexible tubular member (16).

2. Apparatus according to claim 1 wherein said flexible tube is made of soft material.

3. Apparatus according to claim 1 wherein the glass electrode is wrapped in a protective covering bored with a large number of through holes.

4. Apparatus according to claim 3 wherein the covering is a metal net.

5. Apparatus according to claim 1 wherein the glass electrode includes a PH-measuring glass sphere filled with a solution of electrolyte, a glass tube connected at one end to the glass sphere and at the other end to the elongated flexible tubuLar member and a reference electrode immersed in the electrolyte solution filled in the glass sphere and directly connected to the electrical lead.

6. Apparatus according to claim 5 which further comprises a protective tube surrounding the glass tube for its protection.