# US 12,109,366 B2 · Urinary catheter extension tube > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,109,366 B2 - Document ID: US12109366B2 - Status: Granted - Kind: B2 - Application number: 17/236,837 - Filed: 2021-04-21 - Published: 2021-10-28 - Granted: 2024-10-08 - Earliest claimed: 2020-04-22 - Assignees: Dentsply Ih AB - Applicants: Dentsply Ih AB - Inventors: Frida Iselau; Heikki Sojakka - Web page: https://patentgrep.com/patent/US12109366B2 ## CPC - A61M 25/0023: {by the form of the lumen, e.g. cross-section, variable diameter} - A61M 27/00: Drainage appliance for wounds or the like {, i.e. wound drains, implanted drains} ({negative pressure wound therapy devices A61M1/90;} implements for holding wound open A61B17/02 {; middle ear drainage A61F11/202}) - A61L 29/043: {Polysaccharides} - A61L 29/049: {Mixtures of macromolecular compounds} - A61M 25/0045: {multi-layered, e.g. coated (coating materials A61L29/08)} - A61M 25/002: {Packages specially adapted therefor (combined with means for introducing catheters, e.g. dispensers, A61M25/0113); catheter kit packages (for surgical articles A61B50/30)} - A61M 2025/0025: {having a collapsible lumen} - A61M 2210/1089: Urethra - 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)} - A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K) ## Abstract An extension tube for a urinary catheter comprises a tubular body with an inlet opening, an outlet opening and an internal lumen extending between the inlet opening and the opening. The tubular body comprising at least a first layer, which first layer includes natural and/or regenerated cellulose fibers, and preferably to a large extent, such as at least 40 wt %. The tubular body is further arranged to be compressible into a compacted, preferably generally flat, storage state, and to be expandable into an expanded, tubular use state. ## Claims ### Claim 1 An extension tube for a urinary catheter, comprising a tubular body with an inlet opening, an outlet opening and an internal lumen extending between said inlet opening and said outlet opening, wherein the tubular body has a length in the range of 30-70 cm and, in an erected state, a maximum cross-sectional extension in the range of 0.5-3 cm, said tubular body comprising at least a first layer, said first layer including natural and/or regenerated cellulose fibers, and wherein the tubular body is arranged to be compressible into a generally flat compacted storage state, and to be expandable into an expanded, tubular use state, wherein the tubular body has a plurality of longitudinally extending fold lines, extending along an axial direction of the tubular body, wherein the tubular body is arranged to remain intact and stable during a flow of water or urine through the internal lumen for at least 5 minutes. ### Claim 2 (depends on 1) The extension tube of claim 1, wherein said first layer includes at least 40 wt % of natural and/or regenerated cellulose fibers. ### Claim 3 (depends on 1) The extension tube of claim 1, wherein said first layer includes at least 70 wt % of natural and/or regenerated cellulose fibers. ### Claim 4 (depends on 1) The extension tube of claim 1, wherein said first layer includes at least 90 wt % of natural and/or regenerated cellulose fibers. ### Claim 5 (depends on 1) The extension tube of claim 1, wherein said first layer is made primarily of natural cellulose fibers. ### Claim 6 (depends on 5) The extension tube of claim 5, wherein the first layer is made of paper. ### Claim 7 (depends on 1) The extension tube of claim 1, wherein said first layer comprises regenerated cellulose fibers. ### Claim 8 (depends on 7) The extension tube of claim 7, wherein the regenerated cellulose fibers are viscose. ### Claim 9 (depends on 1) The extension tube of claim 1, wherein the tubular body is formed by the first layer as a single layer. ### Claim 10 (depends on 1) The extension tube of claim 1, wherein the tubular body comprises at least one additional layer, said additional layer forming a laminated construction with said first layer. ### Claim 11 (depends on 1) The extension tube of claim 1, wherein at least two of the plurality of longitudinally extending fold lines are arranged oppositely to each other, separated by the same circumferential distance along the tubular body in both directions. ### Claim 12 (depends on 1) The extension tube of claim 1, wherein at least one of the plurality of fold lines is provided with a crease, to form a creased fold line. ### Claim 13 (depends on 1) The extension tube of claim 1, wherein the tubular body, in the erected use state, has a polygonal cross-section. ### Claim 14 (depends on 1) The extension tube of claim 1, wherein the tubular body, when in the erected use state, has a quadrilateral cross-section. ### Claim 15 (depends on 14) The extension tube of claim 14, wherein the tubular body, when in the erected use state, has a cross-section formed as a parallelogram. ### Claim 16 (depends on 1) The extension tube of claim 1, wherein the tubular body has a length in the range of 40-60 cm. ### Claim 17 (depends on 1) The extension tube of claim 1, wherein the extension tube is provided with markings indicating a length along the axial direction of the extension tube. ### Claim 18 (depends on 1) The extension tube of claim 1, wherein the tubular body, in an erected state, has a maximum cross-sectional extension in the range of 1-2.5 cm. ### Claim 19 (depends on 1) An extension tube assembly, comprising: an extension tube in accordance with claim 1, wherein the extension tube is arranged in a compacted state in a roll; and an extension tube dispenser for housing said roll, and comprising a cutter for severing a length of dispensed extension tube from said roll. ### Claim 20 (depends on 1) The extension tube of claim 1, wherein the material forming the extension tube has a surface weight in the range of 50-180 g/m2. ### Claim 21 (depends on 1) The extension tube of claim 1, wherein the tubular body further comprises a flange extending along the full length of the tubular body and protruding away from the internal lumen. ### Claim 22 (depends on 1) The extension tube of claim 1, further comprising friction enhancing elements arranged on an internal side of the extension tube to increase the friction between the extension tube and a therein introduced catheter.