Wound treatment apparatus and method

• US 10,413,644 B2
• Filed: 06/08/2016
• Issued: 09/17/2019
• Est. Priority Date: 04/28/2004
• Status: Active Grant

• Current Assignee: Smith & Nephew PLC
• Original Assignee: Smith & Nephew PLC
• Inventors: Blott, Patrick Lewis, Hartwell, Edward Yerbury, Lee-Webb, Julian, Nicolini, Derek
• Primary Examiner(s): Su, Susan S
• Application Number:
  US15/177,305
• Publication Number:
  US 20160354535A1
• Time in Patent Office: 1,196 Days
• CPC Class Codes: A61F 13/00063 comprising medicaments or additives, e.g. odor control, PH control, debriding, antimicrobic drug delivery dressings A61K9/70; chemical aspect of the additives A61L15/00
• CPC Class Codes: A61F 13/02 Adhesive bandages or dressings
• CPC Class Codes: A61F 13/05 specially adapted for use with sub-pressure or over-pressure therapy, wound drainage or wound irrigation, e.g. for use with negative-pressure wound therapy [NPWT]
• CPC Class Codes: A61F 2007/0069 with return means
• CPC Class Codes: A61F 2007/0075 using a Peltier element, e.g. near the spot to be heated or cooled
• CPC Class Codes: A61F 2013/00174 possibility of applying pressure
• CPC Class Codes: A61F 2013/00221 biodegradable, non-irritating
• CPC Class Codes: A61F 2013/00357 implanted wound fillings or covers membranes for covering bone defects A61F2/2846
• CPC Class Codes: A61F 2013/00536 for draining or irrigating wounds
• CPC Class Codes: A61F 2013/0054 for deep wounds
• CPC Class Codes: A61F 7/034 Flameless
• CPC Class Codes: A61M 1/71 Suction drainage systems containers therefor A61M1/60, A61M1/64; negative pressure wound therapy systems A61M1/90
• 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 1/915 Constructional details of the pressure distribution manifold
• CPC Class Codes: A61M 1/916 specially adapted for deep wounds
• CPC Class Codes: A61M 1/92 with liquid supply means
• CPC Class Codes: A61M 1/964 having venting means on or near the dressing
• CPC Class Codes: A61M 1/966 having a pressure sensor on or near the dressing
• CPC Class Codes: A61M 2205/364 by chemical reaction
• CPC Class Codes: A61M 2205/3653 by Joule effect, i.e. electric resistance
• CPC Class Codes: A61M 2205/368 : by electromagnetic radiation, e.g. IR waves
• CPC Class Codes: A61M 2205/3686 : microwaves
• 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 3/0283 : with at least two inner passageways, a first one for irrigating and a second for evacuating suction-irrigation systems A61M1/77; aspiration tips with fluid supply means A61M1/85; for negative pressure wound therapy A61M1/92
• 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
• CPC Class Codes: A61M 5/14 : Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
• CPC Class Codes: A61M 5/44 : having means for cooling or heating the devices or media
• CPC Class Codes: A61N 2005/0645 : Applicators worn by the patient
• CPC Class Codes: A61N 2005/0659 : infrared
• CPC Class Codes: A61N 5/025 : Warming the body, e.g. hyperthermia treatment
• CPC Class Codes: A61N 5/0616 : Skin treatment other than tanning
• CPC Class Codes: A61N 5/0625 : Warming the body, e.g. hyperthermia treatment

Abstract

An apparatus and method for aspirating, irrigating and/or cleansing wounds is provided. The apparatus and method include one or more of the following: simultaneous aspiration and irrigation of the wound, supplying of thermal energy to fluid circulated through the wound; supplying physiologically active agents to the wound; a biodegradable scaffold in contact with the wound bed; and application of stress or flow stress to the wound bed.

Claims

1. A system for delivering fluid to a wound dressing, the system comprising:

a negative pressure source configured to be coupled to a wound dressing;

a fluid flow device configured to be in fluid communication with the wound dressing, the fluid flow device configured to control flow of fluid to the wound dressing;

a reservoir configured to be coupled to the negative pressure source and configured to be in fluid communication with the wound dressing;

a vent connected to the reservoir;

a valve configured to be positioned between the wound dressing and the reservoir; and

a pressure sensor configured to be positioned coupled to the wound dressing, the pressure sensor configured to send a control signal when the pressure sensor detects a predetermined pressure at the wound dressing,

wherein the negative pressure source is configured to apply negative pressure to a wound by cycling between a first negative pressure level and a second negative pressure level, the vent is configured to bleed the reservoir, the valve is configured to restrict fluid flow to the reservoir, and the fluid flow device is configured to deliver fluid to the wound dressing responsive to the control signal from the pressure sensor, the fluid flow device configured to deliver fluid to the wound in a plurality of fluid supply cycles, each fluid supply cycle supplying a volume of fluid with a time period between fluid supply cycles.

2. The system of claim 1, wherein the fluid flow device is a pump.

3. The system of claim 2, wherein the pump is a variable-speed pump.

4. The system of claim 1, wherein the fluid flow device is a peristaltic pump.

5. The system of claim 1, wherein the fluid flow device is a centrifugal pump.

6. The system of claim 1, wherein the fluid flow device is a valve.

7. The system of claim 1, wherein the fluid flow device is a motorized valve.

8. The system of claim 1, wherein the predetermined pressure is approximately 0.9 atm.

9. The system of claim 1, wherein the predetermined pressure is a negative pressure of no more than 0.9 atm.

10. The system of claim 1, wherein the fluid comprises thermal energy.

11. A system for delivering fluid to a wound dressing, the system comprising:

a negative pressure source configured to aspirate fluid from a wound dressing, the negative pressure source configured to apply negative pressure to a wound by cycling between a first negative pressure level and a second negative pressure level;

a fluid movement device configured to be in fluid communication with the wound dressing, the fluid movement device comprising a control device configured to control flow through the fluid movement device;

a collection vessel configured to be coupled to the negative pressure source and configured to be in fluid communication with the wound dressing;

a vent connected to the collection vessel and configured to bleed fluid from the collection vessel;

a valve configured to be positioned between the wound dressing and the collection vessel, the valve configured to regulate fluid flow from the wound to the collection vessel; and

a pressure sensor configured to be coupled to the wound dressing, the pressure sensor configured to send a control signal when the pressure sensor detects a predetermined pressure under the wound dressing,

wherein the control device is configured to control delivery of fluid by the fluid movement device to the wound dressing responsive to the control signal from the pressure sensor, the control device configured to control delivery of fluid by the fluid movement device such that fluid is supplied to the wound in a plurality of fluid cycles, each fluid cycle supplying a volume of fluid with a time period between fluid supply cycles.

12. The system of claim 11, wherein the fluid movement device comprises a pump.

13. The system of claim 12, wherein the pump comprises a variable-speed pump.

14. The system of claim 11, wherein the fluid movement device comprises a peristaltic pump.

15. The system of claim 11, wherein the fluid movement device comprises a centrifugal pump.

16. The system of claim 11, wherein the fluid movement device comprises a valve.

17. The system of claim 11, wherein the fluid movement device comprises a motorized valve.

18. The system of claim 11, wherein the predetermined pressure is approximately 0.9 atm.

19. The system of claim 11, wherein the predetermined pressure is a negative pressure of no more than 0.9 atm.