Wound treatment apparatus

• US 6,800,074 B2
• Filed: 05/06/2002
• Issued: 10/05/2004
• Est. Priority Date: 11/29/1999
• Status: Expired due to Term

• Current Assignee: KCI Medical Resources Unlimited Company (3M Company)
• Original Assignee: Hill-Rom Services Incorporated (Baxter International Inc.)
• Inventors: Risk, James Robert Jr., Henley, Alan Wayne, Petrosenko, Robert, Sanderson, Ronald Leslie
• Primary Examiner(s): Calvert, John J.
• Assistant Examiner(s): TRUONG, LINH T
• Application Number:
  US10/129,677
• Publication Number:
  US 20020183702A1
• Time in Patent Office: 883 Days
• Field of Search: 604/319-323, 604/305-308
• US Class Current: 604/319
• CPC Class Codes: A61M 1/742 by changing the size of a vent A61M1/7411 takes precedence
• CPC Class Codes: A61M 1/743 by changing the cross-section of the line, e.g. flow regulating valves A61M1/7413 takes precedence
• CPC Class Codes: A61M 1/77 Suction-irrigation systems aspiration tips supplying fluids A61M1/85; specific for negative pressure wound therapy A61M1/92; combined with tracheal tubes A61M16/0463
• CPC Class Codes: A61M 1/784 by filtering, sterilising or disinfecting the exhaust air, e.g. swellable filter valves
• CPC Class Codes: A61M 1/882 Draining devices provided with means for releasing antimicrobial or gelation agents in the drained fluid
• CPC Class Codes: A61M 1/918 for multiple suction locations
• CPC Class Codes: A61M 1/92 with liquid supply means
• CPC Class Codes: A61M 1/962 having pumping means on the suction site, e.g. miniature pump on dressing or dressing capable of exerting suction
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• CPC Class Codes: A61M 27/00 Drainage appliance for wounds or the like , i.e. wound drains, implanted drains negative pressure wound therapy devices A61M1/90; implements for holding wound open A61B17/02 ; middle ear drainage A61F11/202
• CPC Class Codes: A61M 35/00 Devices for applying media, e.g. remedies, on the human body devices for handling toiletry or cosmetic substances A45D; absorbent pads, e.g. swabs, A61F13/15

Abstract

A control system for use with a vacuum bandage over a wound includes a vacuum pump, a waste canister operably coupled to the pump, and a fluid source. The canister is coupled to the bandage such that, when a vacuum is applied to the canister, the vacuum is applied to the bandage. The fluid source is coupled to the bandage to selectively introduce fluid into the wound.

Claims

1. For use with a bandage of the type which covers a wound and within which a vacuum is formed in a space above the wound, a wound treatment apparatus comprising:

a control system;

a vacuum pump;

a waste canister configured to be operably coupled to the pump;

a fluid source including a syringe configured to be coupled to the control system and having a plunger;

a drive associated with the fluid source, the drive being configured to drive the plunger to expel fluid from the syringe; and

a connector allowing operation of the control system when the syringe is coupled to the control system, and suspending operation of the control system when the syringe is removed from the control system.

2. The wound treatment apparatus of claim 1, wherein the drive comprises a motor and a plunger interface movable by the motor to drive the plunger.

3. The wound treatment apparatus of claim 1, wherein the motor is a stepper motor.

4. The wound treatment apparatus of claim 3, wherein the stepper motor is operatively coupled to a lead screw for rotating the lead screw, the lead screw also being operatively coupled to the plunger interface to move the plunger interface to drive the plunger.

5. The wound treatment apparatus of claim 4, comprising a sensor coupled to the drive to detect movement of the plunger.

8. The wound treatment apparatus of claim 1, comprising a hydrophobic filter coupled between the waste canister and the pump to block liquid flow from the waste canister toward the pump.

9. The wound treatment apparatus of claim 8, wherein the hydrophobic filter is positioned in the waste canister and coupled between the waste canister and the pump to block vacuum flow when the waste canister is full.

10. The wound treatment apparatus of claim 1, in which the waste canister and the fluid source are disposable accessories to be coupled to the control system.

11. The wound treatment apparatus of claim 1, comprising a sensor coupled with the waste canister to detect when the canister is full.

12. The wound treatment apparatus of claim 1, comprising two such vacuum pumps, two such waste canisters, two such fluid sources and two such drives for use with two such bandages, thereby allowing simultaneous operation of dual vacuum therapy and irrigation systems.

13. The wound treatment apparatus of claim 12, in which the control system is configured to allow independent operation of the dual systems.

6. For use with a bandage of the type which covers a wound and within which a vacuum is formed in a space above the wound, a control system comprising:

a vacuum pump;

a waste canister to be operably coupled to the pump;

a fluid source;

a drive associated with the fluid source;

the canister configured to be coupled to the bandage such that, when a vacuum is applied to the canister, the vacuum is applied to the bandage;

the fluid source configured to be coupled to the bandage such that, when the drive is energized, fluid is introduced into the wound,

a valve between the waste canister and the vacuum pump, the valve being adjustable to establish the level of vacuum in the canister; and

a vacuum regulator connected to the valve, the regulator being configured to define a maximum level of vacuum, the regulator comprising an air intake port to supply additional air to the pump.

7. The control system of claim 6, comprising a transducer coupled between the valve and the waste canister to measure pressure.

14. A controller for a vacuum bandage, the controller comprising:

a vacuum pump to be coupled to the bandage;

a syringe mount configured to hold a syringe of the type having a plunger for expelling fluid from the syringe to the bandage;

a drive for the plunger; and

a sensor providing feedback to the controller allowing operation of the controller when the syringe is coupled to the syringe mount, and suspending operation of the controller when the syringe is removed from the syringe mount.

15. The controller of claim 14, comprising a waste canister mount configured to hold a waste canister for receiving exudate from the bandage.

16. The controller of claim 14, comprising two such vacuum pumps, two such syringe mounts, and two such drives to allow simultaneous operation of dual vacuum therapy and irrigation systems.

17. The controller of claim 16, being configured to allow independent operation of the dual systems.

18. The controller of claim 17, comprising two such waste canister mounts.

19. A control system for a vacuum bandage, the control system comprising:

a housing comprising a pair of vacuum pumps, a pair of syringe mounts, a pair of syringe drives, and a pair of waste canister mounts;

a controller to provide independent operation of the vacuum pumps;

a pair of waste canisters each removably attached to one of the canister mounts, and in communication with the bandage and one of the vacuum pumps;

a pair of syringes each removably attached to one of the syringe mounts, and in communication with the bandage, and

a sensor providing feedback to the controller allowing operation of the controller when at least one of the syringes is coupled to one of the syringe mounts, and preventing operation of the controller when both syringes are not coupled to the syringe mounts.

20. The control system of claim 19, wherein the waste canisters and syringes are disposable.

21. The control system of claim 19, comprising a connector allowing operation of the controller when at least one of the canisters is coupled to one of the canister mounts, and suspending operation of the controller when both canisters are removed from the canister mounts.