REDUCED-PRESSURE SURGICAL WOUND TREATMENT SYSTEMS AND METHODS

• US 20090299257A1
• Filed: 05/29/2009
• Published: 12/03/2009
• Est. Priority Date: 05/30/2008
• Status: Active Grant

• Current Assignee: Solventum Intellectual Properties Company (Solventum Corp.)
• Original Assignee: KCI Licensing Incorporated (3M Company)
• Inventors: Cavanaugh, Matthew Francis II, Long, Justin Alexander, Barta, Eric Woodson, Wilkes, Robert Peyton, Yao, Li, Kazala, Richard Marvin JR., Randolph, Larry Tab
• Granted Patent: US 9,572,719 B2
• Time in Patent Office: Days
• US Class Current: 602/53
• CPC Class Codes: A61F 13/00 Bandages or dressings radioactive dressings A61N5/1029; Absorbent pads
• CPC Class Codes: A61F 13/00059 provided with visual effects, e.g. printed or colored
• CPC Class Codes: A61F 13/01017 synthetic, e.g. polymer based
• CPC Class Codes: A61F 13/01029 made of multiple layers
• CPC Class Codes: A61F 13/01034 characterised by a property
• CPC Class Codes: A61F 13/01038 Flexibility, stretchability or elasticity
• CPC Class Codes: A61F 13/0209 comprising superabsorbent material
• CPC Class Codes: A61F 13/022 having more than one layer with different fluid retention characteristics
• CPC Class Codes: A61F 13/0223 characterized by parametric properties of the fluid retention layer, e.g. absorbency, wicking capacity, liquid distribution
• CPC Class Codes: A61F 13/0243 characterised by the properties of the skin contacting layer, e.g. air-vapor permeability
• CPC Class Codes: A61F 13/0289 manufacturing of adhesive 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 15/008 Appliances for wound protecting, e.g. avoiding contact between wound and bandage corn plasters A61F13/063
• CPC Class Codes: A61F 2013/00131 elasticity distribution
• CPC Class Codes: A61F 2013/00136 anisotropy
• CPC Class Codes: A61F 2013/00174 possibility of applying pressure
• CPC Class Codes: A61F 2013/00182 with transparent part
• CPC Class Codes: A61F 2013/00246 in a special way pervious to air or vapours
• CPC Class Codes: A61F 2013/0028 applying of mechanical pressure; passive massage
• CPC Class Codes: A61F 2013/00536 for draining or irrigating wounds
• CPC Class Codes: A61F 2013/0054 : for deep wounds
• CPC Class Codes: A61F 2013/00748 : with hydrocolloids or superabsorbers
• CPC Class Codes: A61H 1/008 : Apparatus for applying pressure or blows almost perpendicular to the body or limb axis, e.g. chiropractic devices for repositioning vertebrae, correcting deformation
• CPC Class Codes: A61L 15/60 : Liquid-swellable gel-forming materials, e.g. super-absorbents
• 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 1/915 : Constructional details of the pressure distribution manifold
• CPC Class Codes: A61M 1/916 : specially adapted for deep wounds
• CPC Class Codes: A61M 1/917 : specially adapted for covering whole body parts
• CPC Class Codes: A61M 2205/70 : with testing or calibration facilities
• CPC Class Codes: A61M 2207/00 : Methods of manufacture, assembly or production
• CPC Class Codes: A61M 2210/1007 : Breast; mammary
• CPC Class Codes: A61M 2210/1021 : Abdominal cavity
• CPC Class Codes: Y10T 29/49 : Method of mechanical manufacture
• CPC Class Codes: Y10T 29/49826 : Assembling or joining

Abstract

A reduced-pressure system for treating tissue, such as damaged subcutaneous tissue, includes a shaped dressing bolster for placing on the patient'"'"'s epidermis and substantially sized to overlay the damaged subcutaneous tissue. The system further includes a sealing subsystem for providing a fluid seal over the shaped dressing bolster and a portion of the patient'"'"'s epidermis, and a reduced-pressure subsystem for delivering a reduced pressure to the sealing subsystem. The reduced-pressure system may develop a force, which may include a vertical force that is realized at tissue site deeper than the epidermis or a closing force directed towards the incision. The shaped dressing bolster is shaped to evenly distribute the force. Other methods and systems are included.

Claims

1. A reduced-pressure system for treating subcutaneous damaged tissue, the reduced-pressure system comprising:

a shaped dressing bolster having an oblique extremity and formed from a medical bolster material, the shaped dressing bolster for placing on the patient'"'"'s epidermis and substantially sized to overlay the damaged subcutaneous tissue;

an over-drape for providing a fluid seal over the shaped dressing bolster and a portion of the patient'"'"'s epidermis;

a reduced-pressure source;

a reduced-pressure interface coupled to the drape, the reduced-pressure interface for delivering reduced pressure to the shaped dressing bolster;

a reduced-pressure delivery conduit for fluidly coupling the reduced-pressure source and the reduced-pressure interface; and

wherein the shaped dressing bolster has the characteristic of generating and evenly distributing a radial, compressive force when placed under reduced pressure.

2. The system of claim 1 wherein the shaped dressing bolster comprises a reticulated foam having a density greater than 25.6 kg/m³.

6. The system of claim 1 wherein the radial, compressive force is realized at a tissue site deeper than the epidermis.

7. The system of claim 1 wherein the extremity of the shaped dressing bolster has a trapezoidal shape in cross-section.

8. The system of claim 1 wherein the shaped dressing bolster has an arcuate shape in at least two orthogonal cross-sectionals.

9. The system of claim 1 wherein the shaped dressing bolster further comprises a plurality of lateral notches.

10. The system of claim 1 wherein the shaped dressing bolster further comprises a longitudinal notch.

11. The system of claim 1 wherein the shaped dressing bolster further comprises a plurality of lateral notches and a longitudinal notch.

12. The system of claim 1

wherein the shaped dressing bolster comprises a reticulated foam having a density greater than 25.6 kg/m³;

wherein the extremity of the shaped dressing bolster has a trapezoidal shape in cross-section; and

wherein the shaped dressing bolster further comprises a plurality of lateral notches.

22. The system of claim 1 wherein the shaped dressing bolster comprises a super-absorbent material.

27. The system of claim 1 wherein the over-drape extends over the shaped bolster and wherein the over-drape comprises an anisotropic material.

29. The system of claim 1:

wherein the over-drape extends over the shaped dressing bolster and extends beyond the shaped dressing bolster to form a drape extension, and

further comprising an inner layer coupled to at least a portion of the drape extension on a inward-facing surface and coupled to at least a portion of the shaped dressing bolster on a inward-facing surface, and the inner layer formed with a treatment-area aperture.

30. The system of claim 1 wherein the shaped dressing bolster has the characteristic of developing a radial, compressive force and a closing force directed towards the incision when placed under reduced pressure.

31. The system of claim 1 that does not include a drain.

3-5. -5. (canceled)

13-21. -21. (canceled)

23-26. -26. (canceled)

28. (canceled)

32. A reduced-pressure system for treating damaged subcutaneous tissue in a peri-incisional region of a patient after a surgical procedure, the reduced-pressure system comprising:

a shaped dressing bolster for deploying on the patient'"'"'s epidermis and substantially sized to overlay the damaged subcutaneous tissue and an associated incision, the shaped dressing bolster comprising a medical bolster material having a shaped extremity operable to evenly distribute a compressive force and wherein the shaped dressing bolster has a first surface and a second, inward-facing surface;

wherein the shaped extremity comprises a medical bolster material having an oblique surface;

a sealing subsystem for providing a fluid seal over the shaped dressing bolster and a portion of the patient'"'"'s epidermis;

a reduced-pressure subsystem operable to deliver reduced pressure to the sealing subsystem;

an inner layer having a first surface and a second, inward-facing surface, and formed with a treatment-area aperture, and wherein the first surface of the inner layer is coupled at least in part to the second surface of the shaped dressing bolster; and

wherein the shaped dressing bolster, sealing subsystem, and reduced-pressure subsystem are operable to develop a compressive force realized at a tissue site deeper than the epidermis and an inward force directed toward the incision and substantially within the plane of the epidermis.

33-41. -41. (canceled)

42. A method of treating a damaged subcutaneous tissue on a patient, the method comprising:

positioning a shaped dressing bolster over the damaged subcutaneous tissue, wherein the shaped dressing bolster has an oblique extremity and is formed from a medical bolster material;

deploying an over-drape over the shaped dressing bolster and a portion of the patient'"'"'s epidermis to provide a fluid seal;

providing a reduced-pressure source;

coupling a reduced-pressure interface to the over-drape;

fluidly coupling a reduced-pressure delivery conduit to the reduced-pressure source and to the reduced-pressure interface;

activating the reduced-pressure source to provide reduced pressure to the shaped dressing bolster to develop a compressive force and a closing force.

43. The method of claim 42 wherein the shaped dressing bolster comprises a reticulated foam having a density greater than 25.6 kg/m³.

44. The method of claim 42 wherein the shaped dressing bolster comprises a reticulated foam having a density greater than 32.0 kg/m³.

46. The method of claim 42 wherein the step of positioning a shaped dressing bolster over the damaged subcutaneous tissue includes the step of deploying the shaped dressing bolster at least partially over intact epidermis.

45. (canceled)