# US 2018/0021158 A1 · Stent graft with internal constraining mechanism > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0021158 A1 - Document ID: US20180021158A1 - Status: Published application - Kind: A1 - Application number: 15/216,023 - Filed: 2016-07-21 - Published: 2018-01-25 - Earliest claimed: 2016-07-21 - Assignees: Cook Medical Technologies LLC - Applicants: Cook Medical Technologies LLC - Inventors: Brandon J. Davis; Jarin A. Kratzberg; Blayne A. Roeder; Edwin E. Macatangay; Davorin K. Skender - Web page: https://patentgrep.com/patent/US20180021158A1 ## CPC - A61F 2/97: the outer sleeve being splittable - A61F 2/07: Stent-grafts - A61F 2002/061: {provided with means for allowing access to secondary lumens} - A61F 2002/067: {modular} - A61F 2002/075: {the stent being loosely attached to the graft material, e.g. by stitching} - A61F 2250/0039: differing in diameter - 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 stent graft assembly having a tubular body and a constraining patch attached to the interior surface of the tubular body. The constraining patch delineates a small passageway close to the inner surface of the tubular body. A cannula may extend through the passageway. ## Claims ### Claim 1 A stent graft assembly comprising: a tubular body having a first open end, a second open end, a main lumen between the first open end and the second open end, and an inner surface surrounding the main lumen; a patch disposed in the main lumen and attached to the inner surface and defining a longitudinally extending passageway between the inner surface and the patch, the patch having a first unattached end and a second unattached end; wherein the passageway is in fluid communication with the main lumen through the first unattached end and the second unattached end; wherein neither unattached end is in communication with an exterior of the graft, and wherein the patch is configured to temporarily constrain a portion of a medical instrument within the passageway. ### Claim 2 (depends on 1) The stent graft assembly of claim 1 wherein the tubular body comprises graft material having a sidewall and a fenestration in the sidewall. ### Claim 3 (depends on 2) The stent graft assembly of claim 2 wherein the patch is circumferentially offset from the fenestration. ### Claim 4 (depends on 2) The stent graft assembly of claim 2 wherein the tubular body has a posterior side and an anterior side, and wherein the patch extends at least partially around a circumference of the inner surface; and wherein the fenestration is on the posterior side and the patch is on the anterior side. ### Claim 5 (depends on 1) The stent graft assembly of claim 1 wherein the patch has at least two lateral edges and the patch is attached to the inner surface at the at least two lateral edges. ### Claim 6 (depends on 1) The stent graft assembly of claim 1 further comprising at least one stent ring. ### Claim 7 (depends on 6) The stent graft assembly of claim 6 wherein the stent is disposed at least partially over the patch and in a first configuration closes the passageway. ### Claim 8 (depends on 1) The stent graft assembly of claim 1 further comprising: a fenestration in the tubular body, wherein the first open end is a fluid inlet end and the patch is attached to the inner surface at the first open end. ### Claim 9 (depends on 1) The stent graft of claim 1, wherein the patch comprises a longitudinal tube of graft material having a first open end toward the stent graft first open and a second open end toward the stent graft second open end. ### Claim 10 A stent graft assembly comprising: a tubular body having a main lumen and an inner surface surrounding the main lumen; a patch disposed in the main lumen, the patch comprising a piece of material attached to the inner surface that forms a passageway that extends at least longitudinally along the patch and has a first open end and a second open end; wherein the passageway has a first configuration where a portion of the patch extends away from the inner surface and the passageway is open, and a second configuration where the patch lays flat against the inner surface and the passageway is closed. ### Claim 11 (depends on 10) The stent graft assembly according to claim 10 wherein the patch extends partially around a circumference of the inner surface. ### Claim 12 (depends on 10) The stent graft assembly according to claim 10 further comprising a stent ring disposed about the inner surface and at least partially over the patch. ### Claim 13 (depends on 12) The stent graft assembly according to claim 12 wherein the patch has at least one lateral edge aligned with a strut of the stent ring and wherein the patch is attached to the inner surface at the at least one lateral edge. ### Claim 14 (depends on 13) The stent graft assembly of claim 13 wherein the patch has at least two lateral edges and is attached to the inner surface at the at least two lateral edges. ### Claim 15 (depends on 10) The stent graft assembly of claim 10 wherein the passageway is configured to temporarily receive a medical instrument. ### Claim 16 (depends on 12) The stent graft assembly according to claim 12 wherein the patch is located between the stent ring and the inner surface. ### Claim 17 A stent graft assembly comprising: a tubular body having a main lumen and an inner surface surrounding the main lumen; a patch disposed in the main lumen and attached to the inner surface; the patch forming an constraining tube having a longitudinal constraining lumen extending therethrough, wherein the constraining tube has first and second open ends and wherein neither open end is exposed to an exterior of the tubular body. ### Claim 18 (depends on 17) The stent graft assembly according to claim 17 wherein the constraining tube has a frangible portion extending longitudinally therealong that is susceptible to breaking. ### Claim 19 (depends on 16) The stent graft assembly of claim 16 wherein the tubular body has a posterior side and an anterior side, where the constraining tube is on the anterior surface of the tubular body and further comprising a fenestration on the posterior surface of the tubular body. ### Claim 20 (depends on 17) The stent graft assembly of claim 17, including a delivery device for the stent graft wherein a portion of the delivery device is disposed in the constraining lumen.