# US 8,771,342 B2 · Methods for deploying stents in bifurcations > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,771,342 B2 - Document ID: US8771342B2 - Status: Granted - Kind: B2 - Application number: 12/555,501 - Filed: 2009-09-08 - Published: 2009-12-31 - Granted: 2014-07-08 - Earliest claimed: 2002-12-17 - Assignees: Boston Scientific Scimed, Inc. - Applicants: Gil Vardi - Inventors: Gil Vardi - Web page: https://patentgrep.com/patent/US8771342B2 ## CPC - A61M 25/09: Guide wires - A61F 2/856: Single tubular stent with a side portal passage - A61F 2/954: for placing stents or stent-grafts in a bifurcation - A61F 2/958: Inflatable balloons for placing stents or stent-grafts - A61M 25/01: Introducing, guiding, advancing, emplacing or holding catheters (A61M25/10 takes precedence) - A61M 25/09041: {Mechanisms for insertion of guide wires} - A61B 2017/00469: {for insertion of instruments, e.g. guide wire, optical fibre} - A61F 2250/0098: radio-opaque, e.g. radio-opaque markers - A61M 2025/018: {Catheters having a lateral opening for guiding elongated means lateral to the catheter} - 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)} - 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 method of deploying a stent in a bifurcation includes introducing two guidewires through the main vessel and using the two guidewires for guiding a dual lumen catheter carrying a stent first to an initial position proximal to the stent deployment position, retracting one wire, and projecting it from the catheter and through a side of the stent a branch guidewire into the second branch vessel, and then moving the catheter to the predetermined deployment position while guided by the main guidewire in the first branch vessel, and the branch guidewire in the second branch vessel. The stent is then expanded, and the catheter is removed with the stent remaining in its deployed position An alternative embodiment includes introducing one wire, advancing the system over the one wire and subsequently introducing the second wire. ## Claims ### Claim 1 A method of deploying a stent in a bifurcation of a main vessel which separates into first and second branch vessels, the method comprising: first, inserting a first guidewire into the main vessel such that the first guidewire extends across the bifurcation and into the first branch vessel; providing a stent delivery device including a main lumen for receiving the first guidewire, a branch lumen for receiving a second guidewire, and an expandable stent disposed thereon; after inserting the first guidewire into the main vessel, inserting the second guidewire into the branch lumen of the stent delivery device such that a distal end of the second guidewire is adjacent to a distal end of the branch lumen; after the second guidewire is inserted into the branch lumen, advancing the stent delivery device over the first guidewire through the main vessel to a position adjacent to the bifurcation; without retracting the second guidewire, advancing the second guidewire through the distal end of the branch lumen and into the second branch vessel; advancing the stent delivery device over the first guidewire and the second guidewire to a stent deployment position adjacent the bifurcation; and radially expanding the stent with at least a proximal end of the stent extending into the main vessel. ### Claim 2 (depends on 1) The method of claim 1, wherein a distal end of said stent extends into the first branch vessel in the stent deployment position. ### Claim 3 (depends on 1) The method of claim 1, further comprising: removing the stent delivery device. ### Claim 4 (depends on 3) The method of claim 3, wherein the stent delivery device further comprises an inflatable balloon around which the stent is positioned, and wherein the step of radially expanding the stent comprises inflating the balloon to radially expand the stent. ### Claim 5 (depends on 4) The method of claim 4, wherein the radial expansion of a proximal end and a distal end of the stent are done separately. ### Claim 6 (depends on 5) The method of claim 5, further comprising: deflating the balloon; and removing the balloon together with the stent delivery device. ### Claim 7 A method of deploying a stent in a bifurcation of a main vessel which separates into first and second branch vessels, the method comprising: first, inserting a first guidewire into the main vessel such that the first guidewire extends across the bifurcation and into the first branch vessel; providing a stent delivery device including a branch lumen for receiving the first guidewire, a main lumen for receiving a second guidewire, and an expandable stent disposed thereon, wherein the main lumen extends to a distal end of the stent delivery device; after inserting the first guidewire into the main vessel, inserting the second guidewire into the main lumen of the stent delivery device such that a distal end of the second guidewire is adjacent to a distal end of the main lumen; after the second guidewire is inserted into the main lumen, advancing the stent delivery device over the first guidewire through the main vessel to a position adjacent to the bifurcation; and without retracting the second guidewire, advancing the second guidewire through the distal end of the main lumen and into the second branch vessel. ### Claim 8 (depends on 7) The method of claim 7 further comprising advancing the stent delivery device over the first guidewire and the second guidewire to a stent deployment position adjacent to the bifurcation. ### Claim 9 (depends on 8) The method of claim 8 wherein a distal end of said stent extends into the first branch vessel and a proximal end of the stent extends into the main vessel in the stent deployment position. ### Claim 10 (depends on 8) The method of claim 8 further comprising: radially expanding the stent; and removing the stent delivery device. ### Claim 11 (depends on 10) The method of claim 10, wherein the stent delivery device further comprises an inflatable balloon around which the stent is positioned, and wherein the step of radially expanding the stent comprises inflating the balloon to radially expand the stent. ### Claim 12 (depends on 11) The method of claim 11, wherein the radial expansion of a proximal end and a distal end of the stent are done separately. ### Claim 13 (depends on 12) The method of claim 12, further comprising: deflating the balloon; and removing the balloon together with the stent delivery device. ### Claim 14 A method of deploying a stent in a bifurcation of a main vessel which separates into first and second branch vessels, the method comprising: first, inserting a first guidewire into the main vessel such that the first guidewire extends across the bifurcation and into one of the first branch vessel or the second branch vessel; providing a stent delivery device including a main guidewire lumen, a branch guidewire lumen, and an expandable stent disposed thereon, wherein the main guidewire lumen extends to a distal end of the stent delivery device; after inserting a first guidewire into the main vessel, inserting a second guidewire into either the main guidewire lumen or the branch guidewire lumen of the stent delivery device such that a distal end of the second guidewire is adjacent to a distal end of the respective lumen; after the second guidewire is inserted into either the main guidewire lumen or the branch guidewire lumen, advancing the stent delivery device over the first guidewire through the main vessel to a position adjacent to the bifurcation; without retracting the first guidewire or the second guidewire, advancing the second guidewire through the distal end of either the main guidewire lumen or the branch guidewire lumen and into the second branch vessel; advancing the stent delivery device over the first guidewire and the second guidewire to a stent deployment position adjacent the bifurcation; and radially expanding the stent with at least a proximal end of the stent extending into the main vessel. ### Claim 15 (depends on 1) The method of claim 1, wherein the second guidewire is not initially placed into the bifurcation, but is carried by the stent delivery device to the bifurcation during the step of advancing the stent delivery device over the first guidewire. ### Claim 16 (depends on 7) The method of claim 7, wherein the second guidewire is not initially placed into the bifurcation, but is carried by the stent delivery device to the bifurcation during the step of advancing the stent delivery device over the first guidewire. ### Claim 17 (depends on 14) The method of claim 14, wherein the second guidewire is not initially placed into the bifurcation, but is carried by the stent delivery device to the bifurcation during the step of advancing the stent delivery device over the first guidewire.