Capnographic Sampling Catheter

• US 20080262369A1
• Filed: 12/28/2005
• Published: 10/23/2008
• Est. Priority Date: 12/28/2004
• Status: Abandoned Application

• Current Assignee: Oridion Medical (1987) Ltd. (Medtronic Plc)
• Original Assignee: Oridion Medical (1987) Ltd. (Medtronic Plc)
• Inventors: Colman, Joshua Lewis, Levitsky, Gershon
• Application Number:
  US11/793,782
• Publication Number:
  US 20080262369A1
• Time in Patent Office: Days
• US Class Current: 600/532
• CPC Class Codes: A61B 5/097 Devices for facilitating collection of breath or for directing breath into or through measuring devices
• CPC Class Codes: A61M 16/042 with separate conduits for in-and expiration gas, e.g. for limited dead volume
• CPC Class Codes: A61M 16/0461 Nasoendotracheal tubes
• CPC Class Codes: A61M 16/0484 at the distal end
• CPC Class Codes: A61M 16/0486 Multi-lumen tracheal tubes
• CPC Class Codes: A61M 16/085 Gas sampling
• CPC Class Codes: A61M 16/10 Preparation of respiratory gases or vapours
• CPC Class Codes: A61M 2202/0208 Oxygen
• CPC Class Codes: A61M 2230/432 partial CO2 pressure (P-CO2)

Abstract

The present invention seeks to provide a system for analyzing the exhaled breath of a subject, including a gas analyzer, sensitive to at least one component of the exhaled breath and a gas sampling catheter having a first end and a second end, the first end being in fluid flow communication with the gas analyzer, wherein the gas sampling catheter has a plurality of exhaled breath sampling holes formed therein.

Claims

1. A system for analyzing the exhaled breath of a subject, comprising:

a gas analyzer, sensitive to at least one component of said exhaled breath; and

a gas sampling catheter having a first end and a second end, said first end being in fluid flow communication with said gas analyzer, said gas sampling catheter having a plurality of exhaled breath sampling holes formed therein in the vicinity of said second end.

2. A system according to claim 1, wherein different ones of said plurality of sampling holes are disposed at different longitudinal positions along said gas sampling catheter.

3. A system according to claim 1, wherein different ones of said plurality of sampling holes are disposed at different circumferential positions around said gas sampling catheter.

4. A system according to claim 1 and also comprising a suction element, configured to remove fluid from said gas sampling catheter.

5. A system according to claim 1 and wherein said plurality of sampling holes are disposed in a generally helical pattern.

6. A system according to claim 1 and wherein said second end of said gas sampling catheter is sealed.

7. A system according to claim 1 and wherein said first end of said gas sampling catheter is directly connected to said gas analyzer, thereby forming said fluid flow communication therebetween.

8. A system according to claim 1 and wherein said first end of said gas sampling catheter is connected to said gas analyzer by means of a breath conduit.

9. A system according to claim 4 and wherein said gas sampling catheter is fitted with a suction port, said suction port being adapted to connect to said suction element.

10. A system according to claim 1 and wherein said gas sampling catheter has at least one circumferential protrusion formed therearound

11. A system according to claim 1 and also comprising:

an oxygen delivery tube mounted onto said gas sampling catheter, thereby forming a multi-lumen tube therewith; and

an oxygen source connected to said oxygen delivery tube for supply of oxygen thereto.

12. A gas sampling catheter comprising a catheter tube being formed with a plurality of exhaled breath sampling holes.

13. A gas sampling catheter according to claim 12, wherein different ones of said plurality of sampling holes are disposed at different longitudinal positions along said catheter tube.

14. A gas sampling catheter according to claim 12 wherein different ones of said plurality of sampling holes are disposed at different circumferential positions around said catheter tube.

15. A gas sampling catheter according to claim 12 and wherein said plurality of sampling holes are disposed in a generally helical pattern.

16. A gas sampling catheter according to claim 12 and wherein one end of said catheter tube is sealed.

17. A gas sampling catheter according to claim 12 and wherein said catheter tube has at least one circumferential protrusion formed therearound.

18. A gas sampling catheter according to claim 13 wherein different ones of said plurality of sampling holes are disposed at different circumferential positions around said catheter tube.

19. A gas sampling catheter according to claim 13 and wherein said plurality of sampling holes are disposed in a generally helical pattern.

20. A gas sampling catheter according to claim 13 and wherein one end of said catheter tube is sealed.