# US 10,500,035 B2 · Pancreatic stent with drainage feature > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,500,035 B2 - Document ID: US10500035B2 - Status: Granted - Kind: B2 - Application number: 15/819,428 - Filed: 2017-11-21 - Published: 2018-04-05 - Granted: 2019-12-10 - Earliest claimed: 2014-10-09 - Assignees: Boston Scientific Scimed, Inc. - Applicants: Boston Scientific Scimed, Inc. - Inventors: Kevin Walsh; Gary Trendel; Paul Mannion - Web page: https://patentgrep.com/patent/US10500035B2 ## CPC - A61F 2/04: Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts (A61F2/18, A61F2/20 take precedence; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95) - A61F 2/07: Stent-grafts - A61F 2/885: {comprising a coil including a plurality of spiral or helical sections with alternate directions around a central axis} - A61F 2/90: characterised by a net-like or mesh-like structure - A61M 27/002: {Implant devices for drainage of body fluids from one part of the body to another (intraocular A61F9/00781; middle ear A61F11/202)} - A61F 2002/041: {Bile ducts} - A61F 2002/072: {Encapsulated stents, e.g. wire or whole stent embedded in lining} - A61F 2240/00: Manufacturing or designing of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof - A61F 2240/001: Designing or manufacturing processes - A61F 2240/005: Templates - 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 A pancreatic stent includes a main body convertible between a compressed configuration for delivery and an expanded configuration once deployed, the main body including an inner surface defining a stent lumen and an outer surface. A plurality of drainage features are formed within the outer surface of the main body, the plurality of drainage features permitting placement of the pancreatic stent within a patient's pancreas without blocking side branches of the pancreas. ## Claims ### Claim 1 A medical stent comprising: a main body convertible between a compressed configuration for delivery and an expanded configuration once deployed, the main body including an inner surface defining a stent lumen and an outer surface; a plurality of drainage features formed within the outer surface of the main body and at least partly formed by the outer surface of the main body, the plurality of drainage features permitting placement of the medical stent within a patient's body structure without blocking side branches of the body structures; wherein the main body includes an expandable metal framework; and a polymeric layer over the expandable metal framework creating the outer surface of the main body; wherein the outer surface is non-uniform and includes high spots forming peaks of the plurality of drainage features. ### Claim 2 (depends on 1) The medical stent of claim 1, wherein the expandable metal framework and the polymeric layer in combination are convertible between the compressed configuration and the expanded configuration. ### Claim 3 (depends on 1) The medical stent of claim 1, wherein the expandable metal framework comprises a braided metal structure. ### Claim 4 (depends on 3) The medical stent of claim 3, wherein the braided metal structure comprises nitinol. ### Claim 5 (depends on 1) The medical stent of claim 1, wherein in the compressed configuration, the medical stent has a diameter of at least 2 millimeters. ### Claim 6 (depends on 3) The medical stent of claim 3, wherein in the expanded configuration, the medical stent has a diameter in the range of about 4 to about 24 millimeters. ### Claim 7 A medical stent comprising: an expandable metal support structure that is convertible between a compressed configuration for delivery and an expanded configuration once deployed; a polymeric covering disposed over the expandable metal support structure and defining an outer surface of the medical stent, the polymeric covering expandable with the expandable metal support structure; and a plurality of drainage features formed in the medical stent and at least partly formed by the outer surface of the medical stent, the plurality of drainage features permitting placement of the medical stent within a patient's body structure without blocking side branches of the body structure; wherein the expandable metal support structure comprises a braided metal stent formed having a high-low pattern in at least some adjoining windings. ### Claim 8 (depends on 7) The medical stent of claim 7, wherein the polymeric covering conforms to the high-low pattern in at least some of the adjoining windings to partly form the plurality of drainage features. ### Claim 9 (depends on 7) The medical stent of claim 7, wherein the braided metal stent is formed from nitinol wire. ### Claim 10 (depends on 7) The medical stent of claim 7, wherein the high-low pattern is formed by braiding the braided metal stent on a mandrel having a high-low pattern formed on an outer surface of the mandrel. ### Claim 11 (depends on 7) The medical stent of claim 7, wherein at least some of the plurality of drainage features extend helically about the medical stent. ### Claim 12 A medical stent comprising: a drainage feature defined by a valley between first and second peaks; an expandable metal support structure including a first, second, and third wire, the first wire following the first peak at least partially around a circumference of the medical stent, the second wire following the second peak at least partially around the circumference of the medical stent, and the third wire following the valley at least partially around the circumference of the medical stent; and a polymeric covering disposed at least over the first and second wires of the expandable metal support structure to form the first and second peaks of the drainage feature. ### Claim 13 (depends on 12) The medical stent of claim 12, wherein the expandable metal support and the polymeric covering in combination are convertible between a compressed configuration for delivery and an expanded configuration once deployed. ### Claim 14 (depends on 13) The medical stent of claim 13, wherein in the compressed configuration, the medical stent has a diameter of at least 2 millimeters. ### Claim 15 (depends on 14) The medical stent of claim 14, wherein in the expanded configuration, the medical stent has a diameter in the range of about 4 to about 24 millimeters. ### Claim 16 (depends on 12) The medical stent of claim 12, wherein the first, second and third wires extend in a helical direction along the expandable metal support structure. ### Claim 17 (depends on 1) The medical stent of claim 1, wherein the plurality of drainage features include a valley defined between adjacent peaks extending helically about the medical stent, wherein the valley and peaks are defined by a high-low pattern in a braided structure of the expandable metal framework. ### Claim 18 (depends on 17) The medical stent of claim 17, wherein the valley is located at the same radial distance as an outer diameter of the main body between adjacent drainage features. ### Claim 19 (depends on 7) The medical stent of claim 7, wherein the plurality of drainage features include a valley defined between adjacent peaks extending helically about the medical stent, wherein the valley and peaks are defined by the high-low pattern. ### Claim 20 (depends on 19) The medical stent of claim 19, wherein the valley is located at the same radial distance as an outer diameter of the expandable metal support structure between adjacent drainage features.