Resuscitator with carbon dioxide detector

• US 5,456,249 A
• Filed: 01/05/1994
• Issued: 10/10/1995
• Est. Priority Date: 10/15/1991
• Status: Expired due to Term

• Current Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Original Assignee: Gilbert M. Kirk
• Inventors: Kirk, Gilbert M.
• Primary Examiner(s): Asher, Kimberly L.
• Application Number:
  US08/177,438
• Time in Patent Office: 643 Days
• Field of Search: 128/200.24, 128/202.22, 128/204.18, 128/205.12, 128/205.13, 128/205.17, 128/205.23-205.25, 128/205.28 , 128/202.27-203.11, 128/203.28, 128/203.29, 128/207.12, 128/207.16
• US Class Current: 128/205.13
• 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 16/0816 Joints or connectors
• CPC Class Codes: A61M 16/106 in a path
• CPC Class Codes: A61M 16/12 by mixing different gases
• 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 resuscitator is provided with an integral carbon dioxide detector for indicating the presence of carbon dioxide in a patient. The carbon dioxide detector is a conventional pH sensitive chromogenic compound that is positioned in the breathing circuit to permit a rapid indication. Additionally, a unique plug is provided for sealing the indicator from the atmosphere while in storage to prevent contamination and degredation of the indicator compound.

Claims

1. A resuscitator comprising:

a flexible container for supplying gas to a patient having outlet and inlet openings;

a regulator having a respiratory passageway for passing both fresh and exhaled gases fixed at one end to said outlet opening and having an inhalation port, an exhalation port and a viewing window;

a control valve located in said respiratory passageway over said outlet opening for controlling fresh gas flow to a patient through said inhalation port;

means for detecting carbon dioxide in exhaled gas from said patient, said detecting means located in said respiratory passageway adjacent to said viewing window such that said detecting means is exposed to fresh and exhaled gasses so as to provide an indication of the condition of the patient on each breath;

a plug for isolating said carbon dioxide detector from the atmosphere; and

scavenging means associated with said plug for absorbing carbon dioxide.

2. The resuscitator of claim 1 further comprising valve means located between said inhalation and exhalation ports for preventing the mixing of said fresh and exhaled gasses.

3. The resuscitator of claim 1 wherein said scavenging means is soda lime.

4. A resuscitator comprising:

a flexible container for supplying gas to a patient having outlet and inlet openings;

a control valve housing fixed to said outlet opening of said container having an inhalation port, an exhalation port and a viewing window;

a control valve located in said housing over said outlet opening for controlling flow of fresh gas to a patient through said inhalation port;

means for detecting carbon dioxide in exhaled gas from said patient prior to entering said exhalation port and located in said viewing window of said housing such that said detecting means is exposed to both fresh and exhaled gas;

sealing means affixed to said exhalation port for preventing said carbon dioxide detector from being exposed to fresh gas during storage of said resuscitator; and

scavenging means associated with said sealing means for absorbing carbon dioxide.

5. The resuscitator of claim 4 wherein said sealing means is a plug.

6. A resuscitator comprising:

a flexible container for supplying gas to a patient;

a regulator, fixed to said flexible container, having a respiratory passageway, an inhalation port, an exhalation port and a viewing window;

a control valve, located in said respiratory passageway of said regulator and communicating with said flexible container, for controlling fresh gas flow to a patient through said inhalation port; and

means for detecting carbon dioxide in exhaled gas from said patient, said detecting means located in said respiratory passageway adjacent to said viewing window such that said detecting means is exposed to fresh and exhaled gasses;

a plug for isolating said carbon dioxide detector from the atmosphere; and

scavenging means associated with said plug for absorbing carbon dioxide.

7. The resuscitator of claim 6 further comprising valve means located between said inhalation and exhalation ports for preventing the mixing of said fresh and stale gasses.

8. The resuscitator of claim 6 wherein said scavenging means is soda lime.