Apparatuses and methods for negative pressure wound therapy

• US 9,050,398 B2
• Filed: 06/22/2011
• Issued: 06/09/2015
• Est. Priority Date: 12/22/2010
• Status: Active Grant

• Current Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Original Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Inventors: Armstrong, Ed, Blackburn, Iain Michael, Emmerson, Robert, Mosholder, Michael B.
• Primary Examiner(s): Zalukaeva, Tatyana
• Assistant Examiner(s): Townsend, Guy K
• Application Number:
  US13/381,884
• Publication Number:
  US 20130310809A1
• Time in Patent Office: 1,448 Days
• Field of Search: 604/543
• US Class Current: 1/1
• 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: A61M 1/71 Suction drainage systems containers therefor A61M1/60, A61M1/64; negative pressure wound therapy systems A61M1/90
• CPC Class Codes: A61M 1/784 by filtering, sterilising or disinfecting the exhaust air, e.g. swellable filter valves
• CPC Class Codes: A61M 1/912 Connectors between dressing and drainage tube
• CPC Class Codes: A61M 1/913 having a bridging element for transferring the reduced pressure from the connector to the dressing
• CPC Class Codes: A61M 1/915 Constructional details of the pressure distribution manifold
• CPC Class Codes: A61M 1/964 having venting means on or near the dressing
• CPC Class Codes: A61M 2039/1027 Quick-acting type connectors
• CPC Class Codes: A61M 2205/7518 bacterial
• CPC Class Codes: A61M 2205/7536 allowing gas passage, but preventing liquid passage, e.g. liquophobic, hydrophobic, water-repellent membranes
• CPC Class Codes: A61M 2205/7563 with means preventing clogging of filters
• CPC Class Codes: A61M 2210/04 Skin
• CPC Class Codes: A61M 39/10 Tube connectors; Tube couplings A61M39/02 takes precedence; connecting needles to syringes or hubs A61M5/34; connecting catheter tubes to hubs A61M25/0014
• CPC Class Codes: A61M 39/1011 Locking means for securing connection; Additional tamper safeties A61M39/16 takes precedence
• CPC Class Codes: F16L 21/00 Joints with sleeve or socket F16L13/00, F16L15/00, F16L17/00, F16L19/00, F16L25/0027, F16L27/00, F16L37/00 take precedence ; specially adapted to be made of plastics or to be used with pipes made of plastics F16L47/06; specially adapted for pipes of brittle material F16L49/02
• CPC Class Codes: F16L 37/08 in which the connection between abutting or axially overlapping ends is maintained by locking members F16L37/22 - F16L37/26 take precedence

Abstract

Disclosed herein are several embodiments of a reduced pressure appliance and methods of using the same in the treatment of wounds. Some embodiments are directed to improved fluidic connectors or suction adapters for connecting to a wound site, for example using softer, kink-free conformable suction adapters. Certain embodiments are directed to connectors used to connect fluid passage tube used in transmitting negative pressure to a fabric channel used in a suction adapter.

Claims

1. A negative pressure wound treatment system comprising:

a conduit configured to deliver negative pressure to the wound from a source of negative pressure;

a suction adapter configured to deliver negative pressure to the wound, wherein the suction adapter comprises an elongate fluid channel having a proximal end and a distal end and an elongate 3D knitted or 3D fabric material extending between the proximal and distal ends; and

a connector configured to securely attach to a proximal portion of the 3D knitted or 3D fabric material, the connector comprising;

a hollow cylindrical body,

a central channel extending through the body, and

two distally extending projections, each projection further comprising at least one barb located thereon, the barbs configured to be pushed into and be retained within a proximal portion of the 3D knitted or 3D fabric material,

wherein a proximal end of the body is configured to be press-fit with an inner or outer surface of the conduit to create a fluidic connection between the 3D knitted or 3D fabric material and the conduit.

2. The system of claim 1, wherein the connector further comprises two distally extending projections, each projection further comprising at least one barb located thereon, the barbs configured to attach to upper and lower portions of the 3D knitted or 3D fabric material.

3. The system of claim 1, wherein the connector comprises a central distally extending projection configured to extend into the 3D knitted or 3D fabric material.

4. The system of claim 3, wherein the central projection further comprises at least one barb.

5. The system of claim 1, wherein the connector comprises at least one opening configured to receive a pin or other locking device, and wherein the pin is pushed through at least a portion of the 3D knitted or 3D fabric material.

6. The system of claim 1, wherein the connector comprises at least one lip configured to be pushed into and secured inside the conduit.

7. The system of claim 1, wherein the connector comprises at least one flexible line and one corresponding cavity configured to receive the at least one line, the line being configured to loop into a proximal portion of the 3D knitted or 3D fabric material.

8. The system of claim 7, wherein the line further comprises at least one barb.

9. The system of claim 1, wherein the connector is configured to remain attached to the 3D knitted or 3D fabric material when subjected to a pulling force of less than 20 kg.

10. The system of claim 1, wherein the suction adapter comprises a top layer and a bottom layer constructed of a liquid-impermeable material disposed over and under the elongate fluid channel, and wherein the top and bottom layers are sealed together with the connector so as to create a fluid-tight seal when the connector is connected to the conduit.

11. A connector for connecting a fluid passage tube to a fabric channel, comprising:

a body having a proximal end and a distal end;

at least one member extending distally from the body, the at least one member configured to extend into the fabric channel;

wherein the proximal end of the body is configured to be press-fit with an inner or outer surface of the fluid passage tube; and

wherein the at least one member comprises at least one flexible line, and wherein the line comprises a tapered tip configured to loop through the fabric channel and be received in and securely connected to a cavity formed in the connector.

12. A negative pressure wound treatment system comprising:

a conduit configured to deliver negative pressure to the wound from a source of negative pressure;

a suction adapter configured to deliver negative pressure to the wound, wherein the suction adapter comprises an elongate fluid channel having a proximal end and a distal end and an elongate 3D knitted or 3D fabric material extending between the proximal and distal ends; and

a connector configured to create a fluidic connection between the 3D knitted or 3D fabric material and the conduit, the connector comprising two distally extending projections spaced apart from one another, each projection further comprising at least one barb located thereon, the barbs configured to be pushed into and be retained within a proximal portion of the 3D knitted or 3D fabric material.

13. The negative pressure wound treatment system of claim 12, wherein the connector comprises a hollow cylindrical body and a central channel extending through the body, wherein a proximal end of the body is configured to be press-fit with an inner surface of the conduit, and wherein the two distally extending projections extend from a distal end of the body.