# US 12,005,179 B2 · Printed absorbent for use in wound fluid collection canisters > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,005,179 B2 - Document ID: US12005179B2 - Status: Granted - Kind: B2 - Application number: 17/424,465 - Filed: 2020-02-04 - Published: 2022-03-10 - Granted: 2024-06-11 - Earliest claimed: 2019-02-08 - Assignees: Solventum Intellectual Properties Company - Applicants: Solventum Intellectual Properties Company - Inventors: Christopher B. Locke; Timothy M. Robinson - Web page: https://patentgrep.com/patent/US12005179B2 ## CPC - A61M 1/882: {Draining devices provided with means for releasing antimicrobial or gelation agents in the drained fluid} - A61M 1/60: {Containers for suction drainage, adapted to be used with an external suction source (containers not adapted for subjection to vacuum A61M1/69)} - A61M 1/98: {Containers specifically adapted for negative pressure wound therapy} - A61M 1/982: {with means for detecting level of collected exudate} - 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 A canister for a wound therapy includes a canister body and a plurality of superabsorbent projections. The canister body is configured to contain wound exudate collected from a wound side. The plurality of superabsorbent projections are fixed to and extend from at least a portion of an interior surface of the canister, and may be formed in a plurality of shapes or patterns comprising circles, squares, hoops/halos, a range of lines, or any combination of said shapes. ## Claims ### Claim 1 A canister for fluid collection, the canister comprising: a canister body configured to contain wound exudate collected from a wound site; and a plurality of superabsorbent projections fixed to and extending from at least a portion of an interior surface of the canister body, wherein the superabsorbent projections comprise a polymer in the form of granules and are configured to dissociate from the interior surface of the canister body while remaining intact such that the superabsorbent projections do not break down to individual granules, wherein the superabsorbent projections comprise a flexible plasticized hydrophilic polymer matrix having a substantially continuous internal structure. ### Claim 2 (depends on 1) The canister of claim 1, wherein the superabsorbent projections are configured to swell upon absorbing the wound exudate and dissociate from the interior surface of the canister body. ### Claim 3 (depends on 1) The canister of claim 1, wherein the interior surface of the canister comprises a rough surface finish to aid in adhering of the superabsorbent projections to the interior surface. ### Claim 4 (depends on 1) The canister of claim 1, wherein the superabsorbent projections are non-contiguous. ### Claim 5 (depends on 1) The canister of claim 1, wherein the superabsorbent projections are printed onto the interior surface of the canister by screen printing, gravure printing, or by x-y plotter printing. ### Claim 6 (depends on 1) The canister of claim 1, wherein the granules are contained in a water soluble carrier polymer. ### Claim 7 (depends on 1) The canister of claim 1, wherein the interior surface is coated with an adhesive film prior to application of the superabsorbent projections. ### Claim 8 (depends on 7) The canister of claim 7, wherein the adhesive film comprises one of a viscose, cyanoacrylate, polyacrylate, gel-like UV-curing, or polyvinyl alcohol. ### Claim 9 (depends on 1) The canister of claim 1, wherein the superabsorbent projections are distributed in a non-uniform pattern on the interior surface of the canister body. ### Claim 10 A method of making a canister for fluid collection comprising: providing a canister body configured to contain wound exudate collected from a wound site; preparing a slurry comprising a superabsorbent material, wherein the slurry comprises a polymer in the form of granules; and applying the slurry onto an interior surface of the canister body in the form of a plurality of superabsorbent projections, wherein the superabsorbent projections are configured to dissociate from the interior surface of the canister body while remaining intact such that the superabsorbent projections do not break down to individual granules, wherein the superabsorbent projections comprise a flexible plasticized hydrophilic polymer matrix having a substantially continuous internal structure. ### Claim 11 (depends on 10) The method of claim 10, wherein the plurality of superabsorbent projections are operable to absorb would exudate collected in the canister. ### Claim 12 (depends on 11) The method of claim 11, wherein the superabsorbent projections are configured to swell and dissociate from the interior surface of the canister body upon absorbing the wound exudate. ### Claim 13 (depends on 10) The method of claim 10, further comprising applying a rough surface finish to the interior surface of the canister to aid in adhering of the superabsorbent projections to the interior surface. ### Claim 14 (depends on 10) The method of claim 10, wherein the granules are contained in a water soluble carrier polymer. ### Claim 15 (depends on 10) The method of claim 10, wherein the interior surface is coated with an adhesive film prior to application of the superabsorbent projections, and the adhesive film comprises one of a viscose, cyanoacrylate, polyacrylate, gel-like UV-curing, or polyvinyl alcohol.