Arrangement for passive gas sampling

• US 20040094154A1
• Filed: 10/16/2003
• Published: 05/20/2004
• Est. Priority Date: 11/20/2002
• Status: Abandoned Application

• Current Assignee: Maquet Critical Care AB (Getinge AB)
• Original Assignee: Siemens-Elema AB (Siemens AG)
• Inventors: Hallback, Magnus, Castor, Rolf
• Application Number:
  US10/686,981
• Publication Number:
  US 20040094154A1
• Time in Patent Office: Days
• US Class Current: 128/204.22
• 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 16/08 Bellows; Connecting tubes having means for taking samples G01N1/22; Water traps; Patient circuits
• CPC Class Codes: A61M 16/085 Gas sampling
• CPC Class Codes: A61M 2016/102 Measuring a parameter of the content of the delivered gas
• CPC Class Codes: A61M 2230/43 Composition of exhalation

Abstract

An arrangement for passive gas sampling of a breathing gas in a breathing system has an element disposed in a tube for the passive diversion of a portion of the flow of breathing gas to a measurement chamber.

Claims

1. An arrangement for passive gas sampling of a breathing gas, comprising:

a tube adapted to receive a flow of breathing gas in an interior of the tube;

a measurement chamber in fluid communication with the interior of the tube; and

an element disposed in said interior of said tube for passively diverting a portion of said flow of breathing gas to said measurement chamber.

2. An arrangement as claimed in claim 1 wherein said element comprises a generally triangular element portion having a tip and a base, said tip being disposed closer to said measurement chamber than said base, said generally triangular element portion having a curved central axis proceeding between said base and said tip and having a cross-section orthogonal to said central axis that is flat at said base and is curved with a decreasing radius of curvature proceeding along said central axis between said base and said tip.

3. An arrangement as claimed in claim 2 wherein said element comprises a generally rectangular element portion disposed adjacent to said base of said generally triangular element portion.

4. An arrangement as claimed in claim 1 wherein said element has a T-shape with a stem and crosspiece, said stem being oriented toward said measurement chamber.

5. An arrangement for passive gas sampling of a breathing gas in a breathing system, comprising:

a housing;

a measurement chamber disposed in said housing;

said housing having a first connection adapted to receive an inspiration flow, a second connection adapted to discharge an expiration flow, and a third connection adapted to discharge the inspiration flow and to receive the expiration flow; and

said housing having a flow path therein configured so that said first connection and said third connection conduct the inspiration flow and the expiration flow along a substantially straight path toward said measurement chamber.