Exhalation condensate collection system for a patient ventilator

• US 5,826,575 A
• Filed: 03/13/1997
• Issued: 10/27/1998
• Est. Priority Date: 03/13/1997
• Status: Expired due to Term

• Current Assignee: Nellcor Puritan Bennett Incorporated (Medtronic Plc)
• Original Assignee: Nellcor Puritan Bennett Incorporated (Medtronic Plc)
• Inventors: Lall, Suresh
• Primary Examiner(s): Weiss, John G.
• Assistant Examiner(s): SRIVASTAVA, VIRENDRA KUMAR
• Application Number:
  US08/816,719
• Time in Patent Office: 593 Days
• Field of Search: 128/205.12, 128/204.21, 128/719, 128/203.12, 128/206.21, 128/205.27
• US Class Current: 128/205.12
• 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 16/0808 Condensation traps
• CPC Class Codes: A61M 16/1065 in the expiratory path

Abstract

The ventilator exhalation gas condensate collection and drainage system includes an exhalation filter and a fluid collector vial. Exhalation breathing gas flows through the collector vial for collection of condensate from the exhalation breathing gas. The exhalation filter includes a locking ring that can be turned to secure or release the fluid collector vial. A drain port on the collector vial can be connected to a drain tube, or can be capped by a drain port cap. A clamp on the tube can be unclamped to drain liquid from the collector vial. The collector vial includes a maximum fill line, to indicate when the collector vial should be emptied.

Claims

1. An exhalation condensate collection system for a patient ventilator having a ventilator airway for supplying breathing gas to a patient, comprising:

a collector vial adapted to be removably attached to the ventilator airway for receiving fluid condensate from breathing gas, said collector vial having a drain port for removal of fluid condensate from said collector vial; and

an exhalation filter an inlet adapted to be connected to the ventilator airway for receiving breathing gas from the ventilator airway and in fluid communication with the collector vial, said exhalation filter including a filter housing, and a rotatable locking ring mounted to said filter housing for securing said fluid collector vial to the filter housing, said filter housing including a baffle in the inlet side of said filter housing to deflect the flow of exhaled gas away from said filter and into said collector vial.

2. The exhalation condensate collection system of claim 1, wherein the filter housing has a conical connector for attaching an exhalation limb of a ventilator breathing circuit.

3. The exhalation condensate collection system of claim 1, wherein said locking ring can be turned to lock or unlock the fluid collector vial in any position on the filter housing.

4. The exhalation condensate collection system of claim 1, wherein said collector vial further comprises a drain port cap for sealing said drain port.

5. The exhalation condensate collection system of claim 1, wherein said collector vial includes a maximum fill line to indicate when the collector vial should be emptied.

6. The exhalation condensate collection system of claim 1, wherein said collector vial further comprises a drain tube connected in fluid communication with said drain port for draining fluid condensate from said collector vial.

7. The exhalation condensate collection system of claim 6, further comprising a clamp disposed on said drain tube, whereby when said collector vial is to be emptied, said clamp on said drain tube can be unclamped to drain fluid condensate from the collector vial.

8. An exhalation condensate collection system for a patient ventilator having a ventilator airway for supplying breathing gas to a patient, comprising:

an exhalation filter having an inlet for receiving breathing gas from the ventilator airway and an outlet, said inlet including a baffle to direct breathing gas away from said filter into a collector vial, and an interior chamber for receiving breathing gas from the collector vial; and

a collector vial removably attached to said exhalation filter for receiving breathing gas and fluid condensate from said ventilator airway and for collecting fluid condensate form breathing gas, said collector vial having a drain port for removal of fluid condensate from said collector vial.

9. The exhalation condensate collection system of claim 8, wherein said exhalation filter comprises a filter housing, and further comprising a rotatable locking ring mounted to said filter housing for securing said fluid collector vial to the filter housing.

10. The exhalation condensate collection system of claim 9, wherein the filter housing has a conical inlet connector adapted to be connected in fluid communication with the ventilator airway for attaching an exhalation limb of a ventilator breathing circuit.

11. The exhalation condensate collection system of claim 9, wherein said locking ring can be turned to lock or unlock the fluid collector vial in any position on the filter housing.

12. The exhalation condensate collection system of claim 8, wherein said collector vial further comprises a drain port cap for sealing said drain port.

13. The exhalation condensate collection system of claim 8, wherein said collector vial includes a maximum fill line to indicate when the collector vial should be emptied.

14. The exhalation condensate collection system of claim 8, wherein said collector vial further comprises a drain tube connected in fluid communication with said drain port for draining said fluid condensate from said collector vial.

15. The exhalation condensate collection system of claim 14, further comprising a clamp disposed on said drain tube, whereby when said collector vial is to be emptied, said clamp on said drain tube can be unclamped to drain fluid condensate from the collector vial.

16. The exhalation condensate collection system of claim 9, wherein said filter housing includes a plurality of bottom key flanges, and said rotatable locking ring is disposed on the bottom key flanges of the filter housing.

17. The exhalation condensate collection system of claim 16, wherein said collector vial has a top key flange, said filter housing includes a pair of adjacent bottom key flanges, and said top key flange interfits with said pair of adjacent bottom key flanges of the filter housing.

18. The exhalation condensate collection system of claim 9, wherein said locking ring has a plurality of tabs generally extending perpendicularly from the locking ring for securing the fluid collector vial to the filter housing.

19. The exhalation condensate collection system of claim 18, wherein said collector vial comprises a plurality of elongated locking flanges having lower inclined sliding surfaces adapted to slidably interfit with said plurality of tabs of said locking ring.

20. An exhalation condensate collection system for a patient ventilator having a ventilator airway for supplying breathing gas to a patient, comprising:

an exhalation filter having an inlet connected to the ventilator airway for receiving breathing gas from the ventilator airway and an outlet, said inlet including a baffle to direct said breathing gas away from said filter, said exhalation filter including a filter housing; and

a fluid collector vial, a rotatable locking ring mounted to said filter housing for securing said fluid collector vial to the filter housing, said filter housing including a plurality of bottom key flanges, and said rotatable locking ring being disposed on the bottom key flanges of the filter housing, said collector vial being removably attached to said exhalation filter by said locking ring for receiving breathing gas and fluid condensate from the inlet of the filter and for collecting fluid condensate from breathing gas, said collector vial having a drain port for removal of fluid condensate from said collector vial.

21. An exhalation condensate collection system for a patient ventilator having a ventilator airway for supplying breathing gas to a patient, comprising:

an exhalation filter having an inlet connected to the ventilator airway for receiving breathing gas from the ventilator airway and an outlet, said inlet including a baffle to direct breathing gas away from the filter, said exhalation filter including a filter housing; and

a collector vial having a top key flange, the filter housing including a pair of adjacent bottom key flanges, said top key flange intermitting with said pair of adjacent bottom key flanges of the filter housing, the filter housing having a rotatable locking ring mounted to said filter housing for securing the fluid collector vial to the filter housing, said rotatable locking ring being disposed on the bottom key flanges of said filter housing, said collector vial being removably attached to said exhalation filter by said locking ring for receiving breathing gas and fluid condensate from the inlet of said filter and for collecting fluid condensate from breathing gas, said collector vial having a drain port for removal of fluid condensate from the collector vial.

22. An exhalation condensate collection system for a patient ventilator having a ventilator airway for supplying breathing gas to a patient, comprising:

an exhalation filter having an inlet for receiving breathing gas from the ventilator airway and an outlet, said outlet including a baffle to direct said breathing gas away from said filter; and

a collector vial removably attached to said exhalation filter for receiving breathing gas and fluid condensate from said ventilator airway and for collecting fluid condensate from breathing gas, said exhalation filter having a rotatable locking ring mounted to the filter housing for securing the fluid collector vial to the filter housing, said locking ring having a plurality of tabs generally extending perpendicularly from the locking ring for securing the fluid collector vial to the filter housing, and said collector vial having a drain port for removal of fluid condensate from said collector vial, wherein said collector vial comprises a plurality of elongated locking flanges having lower inclined sliding surfaces adapted to slidably interfit with said plurality of tabs of said locking ring.