# US 9,750,857 B2 · Systems and methods for treating a tissue site with reduced pressure involving a reduced-pressure interface having a multi-lumen conduit for contacting a manifold

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- Number: US 9,750,857 B2
- Document ID: US9750857B2
- Status: Granted
- Kind: B2
- Application number: 14/678,698
- Filed: 2015-04-03
- Published: 2015-10-01
- Granted: 2017-09-05
- Earliest claimed: 2011-07-26
- Assignees: KCI Licensing, Inc.
- Applicants: KCI Licensing, Inc.
- Inventors: Aidan Marcus Tout; Christopher Brian Locke
- Web page: https://patentgrep.com/patent/US9750857B2

## CPC

- 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]
- A61M 1/00: Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems (catheters A61M25/00; tube connectors, tube couplings, valves or branch units specially adapted for medical use A61M39/00; devices for taking samples of blood A61B5/15; filters implantable into blood vessels A61F2/01)
- A61M 1/73: {comprising sensors or indicators for physical values}
- A61M 1/912: {Connectors between dressing and drainage tube}
- A61M 1/915: {Constructional details of the pressure distribution manifold}
- A61M 1/966: {having a pressure sensor on or near the dressing}
- A61M 25/00: Catheters; Hollow probes (dilators A61M29/00; {peritoneal catheters A61M1/285; tracheal tubes A61M16/04; for drainage A61M27/00; for uterus, vagina or rectum A61M31/00} ; for measuring or testing A61B; {materials for catheters A61L29/00})
- A61F 2013/00174: {possibility of applying pressure}
- A61F 2013/00536: {for draining or irrigating wounds}
- A61F 2013/0054: {for deep wounds}
- A61M 1/96: {Suction control thereof}
- A61M 2205/3344: Measuring or controlling pressure at the body treatment site
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}

## Abstract

Systems and methods for a reduced-pressure interface for connecting a multi-lumen conduit to a distribution manifold. The interface includes a housing having a flange portion and a cavity wall portion. The cavity wall portion forms a cavity having a tissue-facing cavity opening. The interface further includes an attachment device, a conduit port, and a multi-lumen conduit. The attachment device is coupled to a tissue-facing side of the flange portion for coupling the housing to a sealing member. The conduit includes a distal end and a proximal whereby the distal end extends through a conduit aperture and past the cavity wall portion into the cavity. The conduit further includes a primary lumen and a plurality of sensing lumens. The primary lumen and the plurality of sensing lumens extend from the proximal end of the conduit to the distal end. The conduit is adapted to contact the distribution manifold.

## Claims

### Claim 1

A system for treating a tissue site, comprising:
a distribution manifold for placing proximate to the tissue site;
a sealing member for covering the distribution manifold;
a reduced-pressure interface for coupling to the sealing member and comprising a housing forming a cavity adapted to collapse;
a reduced-pressure source; and
a multi-lumen conduit comprising at least one sensing lumen configured to be drawn into contact with the distribution manifold.

### Claim 2 (depends on 1)

The system of claim 1, wherein the multi-lumen conduit further comprises a primary lumen for delivering reduced pressure, and wherein the primary lumen comprises a central lumen and the at least one sensing lumen comprises a peripheral lumen.

### Claim 3 (depends on 2)

The system of claim 2, wherein a distal end of the primary lumen and a distal end of the at least one sensing lumen contact the distribution manifold.

### Claim 4 (depends on 1)

The system of claim 1, wherein the cavity of the reduced-pressure interface is fluidly coupled to the distribution manifold through an aperture in the sealing member.

### Claim 5 (depends on 1)

The system of claim 1, wherein the housing is adapted to collapse when exposed to a pressure (Pc) in the cavity that is less than a threshold pressure (Pt).

### Claim 6 (depends on 1)

The system of claim 1, further comprising an instrumentation unit fluidly coupled to the at least one sensing lumen, wherein the instrumentation unit includes a pressure sensor and a microprocessor, wherein the microprocessor is configured to process a pressure signal from the pressure sensor.

### Claim 7 (depends on 1)

The system of claim 1, wherein the reduced-pressure interface further comprises:
a cutting element at least temporarily coupled to the housing proximate to a tissue-facing opening, the cutting element adapted to form an aperture in the sealing member if the housing collapses.

### Claim 8 (depends on 7)

The system of claim 7, wherein the cutting element is formed from a water soluble material.

### Claim 9 (depends on 7)

The system of claim 7, wherein the distribution manifold has a thickness greater than T when under the influence of reduced pressure at an operating level, wherein the cutting element has a piercing length (Lp), wherein Lp<T, and wherein the cutting element creates an aperture in the distribution manifold.

### Claim 10

A method for treating a tissue site, comprising:
disposing a distribution manifold proximate to the tissue site;
covering the distribution manifold with a sealing member to form a sealed space in which the distribution manifold is disposed;
coupling a reduced-pressure interface to the sealing member, wherein the reduced-pressure interface comprises a semi-rigid material forming a cavity adapted to collapse;
fluidly coupling a first conduit and a second conduit to the cavity;
collapsing the cavity to dispose an end of the second conduit in contact with the distribution manifold; and
delivering reduced pressure through the first conduit to the cavity.

### Claim 11 (depends on 10)

The method of claim 10, further comprising monitoring levels of the reduced pressure through the second conduit.

### Claim 12 (depends on 10)

The method of claim 10, wherein collapsing the cavity comprises applying reduced pressure through the reduced-pressure interface to pull a portion of the distribution manifold into the cavity such that the distribution manifold contacts the second conduit.

### Claim 13 (depends on 10)

The method of claim 10, wherein collapsing the cavity comprises manually applying a driving force to an exterior of the reduced-pressure interface.

### Claim 14 (depends on 10)

The method of claim 10, wherein the semi-rigid material is adapted to collapse when under reduced pressure less than a threshold pressure (Pt).

### Claim 15 (depends on 10)

The method of claim 10, wherein fluidly coupling the first conduit and the second conduit to the cavity comprises:
driving a cutting member through the sealing member to create an aperture in the sealing member; and
dissolving the cutting member causing the second conduit to contact the distribution manifold through the aperture in the sealing member.