ADJUSTABLE VOLUME MANUAL RESUSCITATION BAG ASSEMBLY

• US 20110120472A1
• Filed: 09/04/2008
• Published: 05/26/2011
• Est. Priority Date: 09/07/2007
• Status: Active Grant

• Current Assignee: GaleMed Corporation
• Original Assignee: GaleMed Corporation
• Inventors: Chen, Lorence, Loescher, Thomas C., Lee, Gary C.J.
• Granted Patent: US 8,443,804 B2
• Time in Patent Office: Days
• US Class Current: 128/205.14
• CPC Class Codes: A61M 16/0075 Bellows-type
• CPC Class Codes: A61M 16/0084 self-reinflatable by elasticity, e.g. resuscitation squeeze bags
• CPC Class Codes: A61M 16/0875 Connecting tubes
• CPC Class Codes: A61M 16/20 Valves specially adapted to medical respiratory devices
• CPC Class Codes: A61M 16/209 Relief valves
• CPC Class Codes: A61M 2205/3379 Masses, volumes, levels of fluids in reservoirs, flow rates
• CPC Class Codes: A61M 2240/00 Specially adapted for neonatal use

Abstract

An adjustable volume control manual resuscitation bag assembly includes a resuscitation bag, a volume control knob, a traction assembly operating in response to adjustment of the control knob, and a follower assembly including a bag compression limiting member and a follower which are moved in response to operation of the traction assembly to adjust and limit the volume of gas delivered by compression of the bag.

Claims

1. A manual resuscitation bag assembly comprising:

(a) a manually compressible resuscitation bag comprising an enclosed interior chamber having a gas inlet/outlet port at a proximal end thereof, wherein said resuscitation bag is compressible to exhaust a volume of air in response to of an end of said bag;

(b) an axially movable volume adjustment assembly positioned in said interior chamber comprising a follower assembly including a bag compression stop member and a follower device rigidly secured thereto and extending proximally therefrom;

(c) an adjustable volume control member secured at or adjacent to the proximal end of said resuscitation bag and a traction assembly cooperating therewith and configured to contact and force movement of said follower assembly in response to adjustment of said volume control member; and

(d) a gas inlet/outlet pipe communicating with said interior chamber via said gas inlet/outlet port and configured to direct a volume of air from said resuscitation bag in response to compression thereof.

2. An assembly of claim 1 wherein said traction assembly includes a guide member comprising a plurality of shafts spaced apart to define one or more elongated slots, and wherein said follower device includes one or more flanges received in one or more of said slots, and wherein movement of said shafts forces movement of said follower device along said guide member.

3. An assembly of claim 1 wherein said traction assembly includes a stationary traction device configured to cooperate with said follower device to direct axial movement thereof.

4. An assembly of claim 3 wherein said follower device cooperates with said traction assembly and rotates in response to rotation of said volume control member, and wherein said follower device and said traction device contact one another and are configured to move said follower device axially in response to rotation of said guide member.

5. An assembly of claim 4 wherein said follower device includes a helical track, and wherein said traction member is configured to cooperate with said helical track to provide said axial movement of said follower device in response to rotation of said volume control member.

6. An assembly of claim 5 wherein said helical track comprises a helical recess, and wherein said traction member includes one or more lugs received in said helical recess.

7. An assembly of claim 6 wherein said follower device comprises a cylindrical sleeve, and wherein said helical track is formed along the interior of said cylindrical sleeve.

8. An assembly of claim 7 wherein said traction member comprises an elongated stationary shaft extending within said cylindrical sleeve, and whereby rotation of said volume control member causes rotation of said follower device and axial movement thereof along said traction member.

9. An assembly of claim 3 wherein said follower device comprises a cylindrical sleeve having a helical track formed along the exterior thereof, and wherein said traction assembly includes an elongated traction member extending along the exterior surface of said follower device and having one or more lugs received in said helical track.

10. An assembly of claim 9 wherein said elongated traction member is rotatable in response to rotation of said volume control member, and wherein said follower device moves axially along said guide member in response to rotation of said volume control member.

12. An assembly of claim 1 including a locking member configured for selectively locking said volume adjustment member.

14. An assembly of claim 1 including a flexible tube having a first end communicating with said gas inlet/outlet pipe and a patient connector attached to a second end thereof.

15. An assembly of claim 14 including a pressure relief valve cooperating with said gas inlet/outlet pipe.

16. An assembly of claim 14 including a one-way non-rebreathing valve cooperating with said patient connector.

17. An assembly of claim 1 wherein said resuscitation bag comprises a bellows bag compressible from the distal end thereof.

11. (canceled)

13. (canceled)

18. A manual resuscitation bag assembly comprising:

(a) a manually compressible resuscitation bag comprising an enclosed interior chamber having a gas inlet/outlet port at a proximal end thereof, wherein said resuscitation bag is compressible to exhaust a volume of air in response to compression of the distal end of said bag;

(b) a movable volume adjustment assembly positioned in said interior chamber comprising a component configured for limiting the axial compression of said bag, and wherein said volume adjustment assembly is movable along an axis extending between the distal and proximal ends of said resuscitation bag;

(c) a rotatable volume control member secured adjacent to the proximal end of said resuscitation bag;

(d) traction means cooperating with said volume control member and said volume adjustment assembly for moving said volume adjustment assembly along said axis for selectively limiting the manual compression of said resuscitation bag in response to rotation of said volume control member; and

(e) a gas inlet/outlet pipe communicating with said interior chamber via said gas inlet/outlet port and configured to direct a volume of air from said resuscitation bag in response to compression thereof.

19. An assembly of claim 18 wherein said traction means comprises a traction assembly configured to urge said volume adjustment assembly along said axis in response to rotation of said volume control member.

20. An assembly of claim 19 wherein said volume adjustment assembly comprises a follower member secured to a volume adjustment member whereby said volume adjustment member is moved to increase or decrease the compressible volume of said resuscitation bag in response to rotation of said volume control member.

21. (canceled)