Carbon dioxide detector

• US 4,691,701 A
• Filed: 07/28/1986
• Issued: 09/08/1987
• Est. Priority Date: 07/28/1986
• Status: Expired due to Fees

• Current Assignee: Williams R. Tudor
• Original Assignee: Williams R. Tudor
• Inventors: Williams, R. Tudor
• Primary Examiner(s): Cohen, Lee S.
• Application Number:
  US06/889,763
• Time in Patent Office: 407 Days
• Field of Search: 128/202.22, 128/207.14, 128/207.15, 128/716, 128/719, 422/85
• US Class Current: 128/207.14
• CPC Class Codes: A61M 16/04 Tracheal tubes catheters in general A61M25/00
• CPC Class Codes: A61M 16/0488 Mouthpieces; Means for guiding, securing or introducing the tubes guiding or introducing with laryngoscopes A61B1/267; holding devices on the body A61M25/02
• CPC Class Codes: A61M 2016/0413 with detectors of CO2 in exhaled gases

Abstract

A carbon dioxide detector for determining the correct location of an endotracheal tube following intubation of a patient. The detector includes a housing with a first tubular member for connection to a endotracheal tube or the like, a second tubular member for connection to an anaesthetic circuit and an indicator to indicate the presence of carbon dioxide in the detector. Preferably the indicator is in the form of a transparent disc which sealingly engages an aperture in the housing, the disc having a chemical substance which provides a colour change indication when exposed to carbon dioxide from a patient.

Claims

1. A carbon dioxide detector for use with an endotracheal tube or the like or an anaesthetic circuit comprising:

a housing having a first tubular member for connection to a endotracheal tube or the like;

a second tubular member for connection to said anaesthetic circuit, said first and second tubular members being in communication with the interior of said housing; and

means for indicating the presence of carbon dioxide in said detector comprising an aperture in said housing and in communication with said interior thereof and transparent disc means for sealingly engaging said aperture and thereby being in communication with said housing interior;

said disc means including a chemical substance which provides a colour change indication when exposed to carbon dioxide in said housing.

2. A detector according to claim 1 wherein said housing aperture has a circular collar and said disc means has an on/off snap fit on said collar.

3. A detector according to claim 1 wherein said disc means including surfaces sealing said chemical substance and a removable flap on at least one of said sealing surfaces to expose said substance to said housing aperture.

4. A detector according to claim 1 wherein said chemical substance is Hydrazine salt.

5. A detector according to claim 1 wherein said disc means is formed of litmus paper type material.

6. A detector according to claim 1 wherein said disc means is formed of a powder with a filter means on either side thereof for retaining said powder therebetween.