# US 11,305,052 B2 · Suction-based medical dressing and method of dermal irrigation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,305,052 B2 - Document ID: US11305052B2 - Status: Granted - Kind: B2 - Application number: 16/377,216 - Filed: 2019-04-07 - Published: 2020-10-08 - Granted: 2022-04-19 - Earliest claimed: 2019-04-07 - Applicants: Steven Simpson - Inventors: Steven Simpson - Web page: https://patentgrep.com/patent/US11305052B2 ## CPC - A61M 3/0287: {with an external liquid collector} - A61F 13/023: {wound covering film layers without a fluid retention layer} - 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 1/71: {Suction drainage systems (containers therefor A61M1/60, A61M1/64; negative pressure wound therapy systems A61M1/90)} - A61M 1/84: {Drainage tubes; Aspiration tips (for negative pressure wound therapy A61M1/90; for surgical cutting instruments A61B17/32)} - A61M 1/85: {with gas or fluid supply means, e.g. for supplying rinsing fluids or anticoagulants (for negative pressure wound therapy A61M1/92, A61M1/94; combined with tracheal tubes A61M16/0463; dental instruments with combined rinsing and aspirating A61C17/0208)} - A61M 1/918: {for multiple suction locations} - A61M 1/92: {with liquid supply means} - A61M 1/964: {having venting means on or near the dressing} - A61F 15/008: {Appliances for wound protecting, e.g. avoiding contact between wound and bandage (corn plasters A61F13/063)} - A61F 2013/00174: {possibility of applying pressure} - 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)} - 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) ## Abstract A suction-based medical dressing assembly and method of dermal irrigation provides a flexible tube that is fluidly coupled to at least two bifurcated tube portions defined by a plurality of apertures. The tube has a proximal end opening for discharging ambient fluid. The length of the bifurcated tube portions is surrounded by an absorbent gauze material covered substantially with an occlusive sheet material, and having an adhesive strip thereon. A vacuum assembly creates a negative pressure in the tubes. The ambient fluid is absorbed by the absorbent material, and the negative pressure sucks the fluid through the apertures in the bifurcated tube portions for discharge through the opening in the tube. In operation, a patient applies the adhesive side of the occlusive device to the skin where liquid removal is desired and activates the vacuum-inducing source, thereby causing fluid runoff from the patient to be effectively removed for disposal. ## Claims ### Claim 1 A suction-based dressing assembly comprising: a flexible tube: defining a tube channel and having a proximal tube end defining a proximal tube opening fluidly coupled to the tube channel; and having a bifurcated portion with at least two bifurcated tube portions each spanning outwardly from a joint and each defining a bifurcated tube channel fluidly coupled to the tube channel and each of the at least two bifurcated tube portions including a distal tube end, the at least two bifurcated tube portions defining a plurality of apertures thereon fluidly coupled to each respective bifurcated tube channel; an absorbent porous material surrounding the plurality of apertures on one of the at least two bifurcated tube portions and an absorbent porous material surrounding the plurality of apertures on another of the at least two bifurcated tube portions; an occlusive sheet material disposed on the one of the at least two bifurcated tube portions, at least partially surrounding the absorbent porous material on at least two sides thereof, and having a bottom surface with an adhesive strip disposed thereon; an occlusive sheet material disposed on the another of the at least two bifurcated tube portions, at least partially surrounding the absorbent porous material on at least two sides thereof, and having a bottom surface with an adhesive strip disposed thereon; and a vacuum assembly coupled to the proximal tube end of the tube channel and operably configured to induce negative pressure within the tube channel and the bifurcated tube channel, the at least two bifurcated tube portions defining an open space between outer surfaces of the absorbent porous material surrounding each of the at least two bifurcated tube portions and spanning from the joint of the at least two bifurcated tube portions for flanking a target irrigation area on a user's skin, the open space disposed for receiving ambient liquid over the target irrigation area thereby causing, with the induced negative pressure within the tube channel and the bifurcated tube channel by the vacuum assembly, ambient fluid absorption through the plurality of apertures and into the tube channel and the bifurcated tube channel. ### Claim 2 (depends on 1) The suction-based dressing assembly according to claim 1, wherein: the occlusive sheet material on each of the at least two bifurcated tube portions at least partially surround three sides of the absorbent porous material. ### Claim 3 (depends on 2) The suction-based dressing assembly according to claim 2, wherein: the occlusive sheet material is adhesively coupled to the absorbent porous material on the three sides thereof to form a U-shaped channel shaped and sized to receive the absorbent porous material, wherein the absorbent porous material is gauze. ### Claim 4 (depends on 2) The suction-based dressing assembly according to claim 2, wherein the at least two bifurcated tube portions each further comprise: a first end directly coupled together to define the joint interposed between the proximal tube end of the flexible tube and the distal tube end of each of the at least two bifurcated tube portions; and a bifurcated tube length separating the joint and the distal tube end, the U-shaped channel of the occlusive sheet material spanning at least 50% of the bifurcated tube length. ### Claim 5 (depends on 4) The suction-based dressing assembly according to claim 4, wherein: the U-shaped channel of the occlusive sheet material spans at least 75% of the bifurcated tube length and is of a polymeric material. ### Claim 6 (depends on 4) The suction-based dressing assembly according to claim 4, wherein: the adhesive strip is of a polymeric material and spans an occlusive sheet material length separating the entire U-shaped channel. ### Claim 7 (depends on 1) The suction-based dressing assembly according to claim 1, wherein: the distal tube end defines a distal tube opening fluidly coupled to the bifurcated tube channel. ### Claim 8 (depends on 1) The suction-based dressing assembly according to claim 1, wherein: the bifurcated portion of the flexible tube is of an oblong shape. ### Claim 9 (depends on 1) The suction-based dressing assembly according to claim 1, wherein: the at least two bifurcated tube portions each further comprise: a first end directly coupled together to define a joint interposed between the proximal tube end of the flexible tube and the distal tube end of each of the least two bifurcated tube portions; and a bifurcated tube length separating the joint and the distal tube end, the occlusive sheet material spanning at least 50% of the bifurcated tube length. ### Claim 10 (depends on 9) The suction-based dressing assembly according to claim 9, wherein the occlusive sheet further comprises: a bottom wall portion including the bottom surface and an inner surface; a sidewall portion directly coupled to the bottom wall portion to form a continuously watertight joint and including an inner surface; and an upper wall portion directly coupled to the sidewall portion and including an inner surface, the inner surfaces of the bottom wall portion, the sidewall portion, and the upper wall portion surrounding at least 50% of a circumference defined by the absorbent porous material spanning at least 50% of the bifurcated tube length. ### Claim 11 (depends on 1) The suction-based dressing assembly according to claim 1, wherein: the bifurcated tube channel fluidly couples to the tube channel at a joint. ### Claim 12 (depends on 1) The suction-based dressing assembly according to claim 1, wherein: the vacuum assembly comprises a vacuum pump inducing pressure between 5 to 12 pounds per square inch. ### Claim 13 A suction-based dressing assembly comprising: a flexible tube: defining a tube channel and having a proximal tube end defining a proximal tube opening fluidly coupled to the tube channel; and including a distal tube end and defining a plurality of apertures thereon fluidly coupled to the tube channel; an absorbent porous material surrounding the plurality of apertures; an occlusive sheet material having a bottom wall portion with a bottom surface, a sidewall portion directly coupled to the bottom wall portion, and an upper wall portion directly coupled to the sidewall portion to collectively serve as a watertight joint to prevent fluid from seeping therethrough and forming a U-shaped channel exposing the absorbent porous material thereon to an ambient environment and partially surrounding the absorbent porous material only with the bottom wall portion, the sidewall portion, and the upper wall portion, the bottom surface of the occlusive sheet material with an adhesive strip disposed thereon and spanning an occlusive sheet material length, the adhesive strip being operable to adhere to a user's skin, the flexible tube operably configured to be flexed and adhered to the user's skin with the adhesive strip on the occlusive sheet material and with the exposed absorbent porous material to flank a target irrigation area on the user's skin and define an open space between outer surfaces of the exposed absorbent porous material; a vacuum assembly coupled to the proximal tube end of the tube channel and operably configured to induce negative pressure within the tube channel causing ambient fluid absorption through the plurality of apertures and into the tube channel; and whereby the fluid is operably configured to be drawn from the open space between outer surfaces of the exposed absorbent porous material and on the user's skin, through the exposed absorbent porous material, and through the tube channel for discharge through the proximal tube opening. ### Claim 14 (depends on 13) The suction-based dressing assembly according to claim 13, further comprising: a bifurcated portion on the flexible tube with at least two bifurcated tube portions each defining a bifurcated tube channel fluidly coupled to the tube channel, having a distal end located thereon, and defining the plurality of apertures fluidly coupled to each respective bifurcated tube channel, the absorbent porous material surrounding the plurality of apertures on one of the at least two bifurcated tube portions, an absorbent porous material surrounding the plurality of apertures on another of the at least two bifurcated tube portions, and separate pieces of occlusive sheet material, each with the bottom wall portion, the sidewall portion, and the upper wall portion coupled the respective the respective absorbent porous material. ### Claim 15 (depends on 14) The suction-based dressing assembly according to claim 14, wherein: the occlusive sheet material is adhesively coupled to the absorbent porous material on the three sides thereof to form a U-shaped channel shaped and sized to receive the absorbent porous material. ### Claim 16 (depends on 13) The suction-based dressing assembly according to claim 13, wherein: the adhesive strip comprises a polymeric material, the adhesive strip separating the entire U-shaped channel. ### Claim 17 (depends on 13) The suction-based dressing assembly according to claim 13, wherein: the at least two bifurcated tube portions each further comprise: a first end directly coupled together to define a joint interposed between the proximal tube end of the flexible tube and the distal tube end of each of the least two bifurcated tube portions; and a bifurcated tube length separating the joint and the distal tube end, the occlusive sheet material spanning at least 50% of the bifurcated tube length. ### Claim 18 (depends on 17) The suction-based dressing assembly according to claim 17, wherein: the occlusive sheet further comprises: the bottom wall portion including the bottom surface and an inner surface; the sidewall portion directly coupled to the bottom wall portion to form a continuously watertight joint and including an inner surface; and the upper wall portion directly coupled to the sidewall portion and including an inner surface, the inner surfaces of the bottom wall portion, the sidewall portion, and the upper wall portion surrounding at least 50% of a circumference defined by the absorbent porous material spanning at least 50% of the bifurcated tube length. ### Claim 19 (depends on 17) The suction-based dressing assembly according to claim 17, wherein: the bifurcated tube channel fluidly couples to the tube channel at a joint. ### Claim 20 A method of dermal irrigation with suction-based dressing assembly, comprising: applying a dermal irrigation procedure to a target irrigation area of the skin; connecting a vacuum assembly to a proximal tube end of a tube, the tube being in fluid communication with at least two bifurcated tube portions having a plurality of apertures; covering a substantial length of the bifurcated tube portions with an absorbent gauze material; at least partially surrounding the absorbent gauze material on at least two sides with an occlusive sheet material to expose the absorbent porous material to an ambient environment, the occlusive sheet material having an adhesive strip on a bottom surface; adhering the adhesive strip of the occlusive sheet material to the skin at or near the target irrigation area to define an open space between outer surfaces of the exposed absorbent material with the target irrigation area of the skin between the open space between outer surfaces of the exposed absorbent material; actuating the vacuum assembly to induce negative pressure within the tube and the bifurcated tube; absorbing, through the exposed absorbent gauze material, ambient fluid residue from the dermal irrigation; sucking the ambient fluid through the apertures in the bifurcated tube, whereby the negative pressure causes the ambient fluid to absorb through the absorbent gauze material, the plurality of apertures, and into the bifurcated tube; and discharging the ambient fluid through a proximal tube opening in the proximal tube end of the tube.