# US 8,771,219 B2 · Gastrointestinal implant with drawstring > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,771,219 B2 - Document ID: US8771219B2 - Status: Granted - Kind: B2 - Application number: 13/252,609 - Filed: 2011-10-04 - Published: 2012-02-02 - Granted: 2014-07-08 - Earliest claimed: 2003-12-09 - Assignees: GI Dynamics, Inc. - Applicants: John C. Meade; Andy H. Levine; David A. Melanson; Ronald B. Lamport; John F. Cvinar - Inventors: John C. Meade; Andy H. Levine; David A. Melanson; Ronald B. Lamport; John F. Cvinar - Web page: https://patentgrep.com/patent/US8771219B2 ## CPC - A61F 5/0089: {Instruments for placement or removal} - A61B 17/221: Gripping devices in the form of loops or baskets {for gripping calculi or similar types of obstructions (surgical snare instruments A61B17/32056)} - 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 5/0076: {preventing normal digestion, e.g. Bariatric or gastric sleeves} - A61B 1/00089: {Hoods} - A61B 1/018: for receiving instruments - A61B 2017/00296: {mounted on an endoscope} - A61B 2017/00336: {with a protective sleeve, e.g. retractable or slidable} - A61B 2017/00349: {Needle-like instruments having hook or barb-like gripping means, e.g. for grasping suture or tissue (A61B17/06066 takes precedence)} - A61B 2017/22035: {for retrieving or repositioning foreign objects} - A61B 2017/2215: {having an open distal end} - A61B 2017/347: {Locking means, e.g. for locking instrument in cannula} - 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) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A gastrointestinal implant device includes a flexible, floppy sleeve, open at both ends, that extends into the duodenum. The device further includes a collapsible anchor coupled to the proximal portion of the sleeve. The device further includes a drawstring that is threaded through a proximal end of the anchor, and barbs that extend from the exterior surface of the anchor. The collapsible anchor can be a wave anchor. The drawstring can be used to collapse at least a proximal portion of the implant device. This is useful in removing or repositioning the implant device. ## Claims ### Claim 1 A method of repositioning an implantable device within a natural bodily lumen, the method comprising: engaging a drawstring on the implantable device with a grasper disposed at a distal end of an elongated member within an inner tube; positioning a distal end of the inner tube and grasper disposed therein within an interior portion of the implantable device; drawing the grasper into a distal portion of the inner tube, when the drawstring is engaged by the grasper, to pull the drawstring with the grasper and radially collapse at least a proximal portion of the implantable device; advancing a retrieval hood over at least a proximal portion of the implantable device when collapsed; and moving the implantable device within the natural bodily lumen. ### Claim 2 (depends on 1) The method of claim 1, wherein engaging the drawstring further comprises grasping the drawstring with a retrieval hook disposed at the distal end of the elongated member. ### Claim 3 (depends on 1) The method of claim 1, further comprising using a fluoroscope to confirm that the distal end of the inner tube and grasper disposed therein, have been positioned within the interior portion of the implantable device. ### Claim 4 (depends on 1) The method of claim 1, wherein drawing the grasper further comprises using a fluoroscope to confirm that the implantable device has been radially collapsed. ### Claim 5 (depends on 1) The method of claim 1, wherein drawing the grasper further comprises rotating the elongated member with the grasper disposed at the distal end of the elongated member. ### Claim 6 (depends on 1) The method of claim 1, wherein the retrieval hood is coupled to a distal end of an outer tube. ### Claim 7 (depends on 6) The method of claim 6, wherein the outer tube is an insertion tube of an endoscope. ### Claim 8 (depends on 1) The method of claim 1, wherein the retrieval hood is flared. ### Claim 9 (depends on 6) The method of claim 6, wherein advancing the retrieval hood further comprises pushing the outer tube over at least a proximal portion of the collapsed implantable device. ### Claim 10 (depends on 1) The method of claim 1, wherein moving the implantable device comprises removing the implantable device from the natural bodily lumen. ### Claim 11 A method of repositioning an implantable device within a natural bodily lumen, the method comprising: engaging a drawstring disposed on the implantable device with a grasper disposed at a distal end of an elongated member; positioning the distal end of an inner tube and grasper disposed therein, within an interior portion of the implantable device; collapsing radially at least a proximal portion of the implantable device by pulling the drawstring with the grasper; and moving the implantable device within the natural bodily lumen. ### Claim 12 (depends on 11) The method of claim 11, wherein engaging the drawstring further comprises grasping the drawstring with a retrieval hook disposed at the distal end of the elongated member. ### Claim 13 (depends on 11) The method of claim 11, wherein engaging the drawstring further comprises drawing the grasper into a distal portion of the inner tube when the drawstring is engaged by the grasper. ### Claim 14 (depends on 11) The method of claim 11, wherein positioning further comprises using a fluoroscope to confirm that the distal end of the inner tube and grasper disposed therein, have been positioned within the interior portion of the implantable device. ### Claim 15 (depends on 11) The method of claim 11, wherein collapsing radially further comprises using a fluoroscope to confirm that the implantable device has been radially collapsed. ### Claim 16 (depends on 11) The method of claim 11, wherein collapsing radially further comprises rotating the elongated member with the grasper disposed at the distal end of the elongated member. ### Claim 17 (depends on 11) The method of claim 11, wherein moving the implantable device first comprises advancing a retrieval hood over at least a proximal portion of the collapsed implantable device. ### Claim 18 (depends on 17) The method of claim 17, wherein the retrieval hood is coupled to a distal end of an outer tube. ### Claim 19 (depends on 18) The method of claim 18, wherein the outer tube is an insertion tube of an endoscope. ### Claim 20 (depends on 17) The method of claim 17, wherein the retrieval hood is flared. ### Claim 21 (depends on 18) The method of claim 18, wherein advancing the retrieval hood further comprises pushing the outer tube over at least a proximal portion of the collapsed implantable device. ### Claim 22 (depends on 11) The method of claim 11, wherein moving the implantable device comprises removing the implantable device from the natural bodily lumen.