Resuscitator bag exhaust port with CO.sub.2 indicator

• US 5,749,358 A
• Filed: 10/10/1996
• Issued: 05/12/1998
• Est. Priority Date: 10/10/1996
• Status: Expired due to Term

• Current Assignee: Nellcor Puritan Bennett Incorporated (Medtronic Plc)
• Original Assignee: Nellcor Puritan Bennett Incorporated (Medtronic Plc)
• Inventors: Colburn, Joel, Good, Robert J.
• Primary Examiner(s): Millin, V.
• Assistant Examiner(s): SRIVASTAVA, VIRENDRA KUMAR
• Application Number:
  US08/729,618
• Time in Patent Office: 579 Days
• Field of Search: 128/205.28, 128/205.23, 128/202.28, 128/202.29, 128/203.11, 128/205.13, 128/204.18, 128/204.22, 128/207.14, 128/205.24
• US Class Current: 128/205.23
• CPC Class Codes: A61M 16/0078 Breathing bags
• CPC Class Codes: A61M 16/0084 self-reinflatable by elasticity, e.g. resuscitation squeeze bags
• CPC Class Codes: A61M 16/085 Gas sampling
• CPC Class Codes: A61M 16/20 Valves specially adapted to medical respiratory devices
• CPC Class Codes: A61M 16/208 Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves
• CPC Class Codes: A61M 16/209 Relief valves
• CPC Class Codes: A61M 2016/0413 with detectors of CO2 in exhaled gases
• CPC Class Codes: A61M 2230/432 partial CO2 pressure (P-CO2)

Abstract

A carbon dioxide indicator in an exhaust port of a resuscitator assembly. The carbon dioxide indicator is preferably in a removable insert for ease of maintenance and replacement. Breath-to-breath indications are provided by either exposing the indicator to the ambient air at the exhaust port, or diverting a portion of the fresh air or gases provided to the patient.

Claims

1. A resuscitator for supplying gas to a patient, comprising:

a flexible container having inlet and outlet openings;

a regulator coupled to said outlet opening and providing a passageway from said flexible container to said patient;

an exhaust housing in fluid communication with said regulator, said housing having an exhaust port end and a regulator end, said regulator end adjacent said regulator, said exhaust port exhausting into ambient air, said exhaust port including at least a portion which is transparent; and

a carbon dioxide indicator mounted in said exhaust port adjacent said transparent portion.

2. The resuscitator of claim 1 wherein said exhaust port includes a PEEP port, said carbon dioxide indicator being mounted in said PEEP port.

3. The resuscitator of claim 1 wherein said carbon dioxide indicator is embedded on paper.

4. The resuscitator of claim 1 wherein said regulator is configured to isolate said exhaust port from fresh gases from said flexible container, and further comprising a passageway between said regulator and said exhaust port to divert a fraction of said fresh gases to said exhaust port to clear said carbon dioxide indicator.

5. The resuscitator of claim 4 wherein said fraction of fresh gases diverted is 50% or less.

6. The resuscitator of claim 1 further comprising a removable seal around said exhaust port for shielding said carbon dioxide indicator from ambient light prior to use.

7. The resuscitator of claim 6 wherein said removable seal includes an inner tubular portion for extending into said exhaust port, such that a portion of said exhaust port is shielded on both the outside and inside.

8. The resuscitator of claim 1 further comprising:

a generally cylindrical insert removably inserted into said exhaust port, said insert including at least one member for retaining said carbon dioxide indicator.

9. The resuscitator of claim 8 wherein said insert has a tapered shape to allow a press fit into said exhaust port, and further comprising a plurality of said members for retaining said indicator, said members being attached to an inside of said insert and extending substantially parallel to an inside surface of said insert.

10. The resuscitator of claim 1 wherein said exhaust port includes an inner portion surrounding a tube extending from said flexible container into said regulator and an outer, PEEP port portion, said carbon dioxide indicator being mounted in said inner portion.

11. A resuscitator for supplying gas to a patient, comprising:

a flexible container having inlet and outlet openings;

a regulator coupled to said outlet opening and providing a passageway from said flexible container to said patient, said regulator being configured to isolate said exhaust port from fresh gases from said flexible container;

an exhaust port housing in fluid communication with said regulator, said housing having an exhaust port end and a regulator end, said regulator end adjacent said regulator, said exhaust port exhausting into ambient air, said exhaust port including an outer PEEP port;

a carbon dioxide indicator mounted in said PEEP port;

a generally cylindrical insert removably inserted into said PEEP port, said insert including at least one member for retaining said carbon dioxide indicator paper; and

a passageway between said regulator and said exhaust port to divert 50% or less of said fresh gases to said exhaust port to clear said carbon dioxide indicator.

12. The resuscitator of claim 11 further comprising a removable seal around said exhaust port for shielding said carbon dioxide indicator from ambient light prior to use.

13. The resuscitator of claim 12 wherein said removable seal includes an inner tubular portion for extending into said exhaust port, such that a portion of said exhaust port is shielded on both the outside and inside.

14. The resuscitator of claim 11 wherein said insert has a tapered shape to allow a press fit into said exhaust port, and further comprising a plurality of said members for retaining said indicator, said members being attached to an inside of said insert and extending substantially parallel to an inside surface of said insert.

15. A method for providing a breath-to-breath indication of carbon dioxide detection in a resuscitator, comprising the steps of:

providing a resuscitator having a resuscitator bag, a regulator connected to said bag, and an exhaust port housing in fluid communication with said regulator, said housing having an exhaust port end and a regulator end, said regulator end adjacent said regulator, said exhaust port exhausting into ambient air;

inserting a carbon dioxide indicator into said exhaust port; and

sealing said carbon dioxide indicator from ambient light and moisture.