Bifurcated side-access intravascular stent graft

Abstract

A bifurcated intravascular stent graft comprises primary stent segments and a primary graft sleeve, forming a main fluid channel and having a side opening therethrough. An external graft channel formed on the primary graft sleeve has a first end communicating with the side opening and an open second end outside the primary graft sleeve, thereby providing a branch flow channel from the main channel out through the side opening and external graft channel. The primary stent segments and graft sleeve engage an endoluminal surface of a main vessel and form substantially fluid-tight seals. The stent graft further comprises a secondary stent graft, which may be positioned partially within the external graft channel, through the open second end thereof, and partially within a branch vessel. The secondary stent graft engages the inner surface of the external graft channel and the endoluminal surface of the branch vessel, thereby forming substantially fluid-tight seals.

1 . Prosthetic conduit system comprising:
 an expandable main conduit having a first open end, a second open end, a main conduit wall extending therebetween, an outer conduit surface, and an inner conduit surface;   an expandable secondary conduit having a first open end, a second open end, a secondary wall extending therebetween, and an attachment portion extending at an angle of less than 90 degrees from the secondary wall when in a deployed state; and   wherein at least a portion of the secondary conduit is sized to fit inside the main conduit.   
     
     
         2 . The prosthetic conduit system of  claim 1 , wherein the main conduit wall comprises at least one opening and at least a portion of the attachment secondary conduit portion extends through the at least one opening. 
     
     
         3 . The prosthetic conduit system of  claim 2 , wherein the main conduit includes an internal channel having an inner surface, an outer surface, a first open end located within the main conduit, and a second open end at the opening in the main conduit wall;
 an expandable secondary conduit having a first open end, a second open end, a secondary conduit wall extending therebetween, and an attachment portion extending at an angle of less than 90 degrees from the secondary conduit wall when in a deployed state; and   wherein at least a portion of the secondary conduit is sized to fit inside the internal channel and through the opening in the main conduit wall.   
     
     
         4 - 7 . (canceled) 
     
     
         8 . The prosthetic conduit system of  claim 3 , wherein the expandable main conduit is balloon expandable. 
     
     
         9 . The prosthetic conduit system of  claim 3 , wherein the expandable main conduit is self-expanding. 
     
     
         10 . (canceled) 
     
     
         11 . The prosthetic conduit system of  claim 3 , wherein the main conduit comprises a graft material. 
     
     
         12 . The prosthetic conduit system of  claim 3 , wherein the secondary conduit comprises a graft material. 
     
     
         13 . The prosthetic conduit system of  claim 11 , wherein the graft material comprises ePTFE. 
     
     
         14 . The prosthetic conduit system of  claim 12 , wherein in the graft material comprises ePTFE. 
     
     
         15 . The prosthetic conduit system of  claim 3 , wherein the expandable main conduit comprises a first stent segment at the first open end and a second stent segment at the second open end. 
     
     
         16 . The prosthetic conduit system of  claim 15 , wherein the first stent segment and the second stent segment comprise a single stent extending from the first open end to the second open end. 
     
     
         17 . The prosthetic conduit system of  claim 3 , wherein the attachment portion comprises a flange. 
     
     
         18 . The prosthetic conduit system of  claim 15 , wherein the first stent segment and the second stent segment comprise nitinol. 
     
     
         19 . The prosthetic conduit system of  claim 3 , wherein the expandable secondary conduit comprises a first stent segment at the first open end and a second stent segment at the second open end. 
     
     
         20 . The prosthetic conduit system of  claim 19 , wherein the first stent segment and the second stent segment comprise a single stent extending from the first open end to the second open end. 
     
     
         21 . The prosthetic conduit system of  claim 20 , wherein the first stent segment and the second stent segment comprise nitinol. 
     
     
         22 . Prosthetic conduit system comprising:
 an expandable main conduit having a first open end, a second open end, a main conduit wall extending therebetween, at least one opening through the main conduit wall, and an internal channel having an inner surface, an outer surface, a first open end located within the main conduit, and a second open end at the opening in the wall;   an expandable secondary conduit having a first open end, a second open end, a secondary conduit wall extending there between, and an attachment portion extending at an angle of less than 90 degrees from the secondary conduit wall when in a deployed state; and   wherein at least a portion of the secondary conduit is located inside the internal channel.   
     
     
         23 . The prosthetic conduit system of  claims 22 , wherein the attachment portion is in contact with the internal channel. 
     
     
         24 - 25 . (canceled) 
     
     
         26 . The prosthetic conduit system of  claim 22 , wherein the attachment portion is in contact with the first open end of the internal channel. 
     
     
         27 . (canceled) 
     
     
         28 . The prosthetic conduit system of  claim 22 , wherein the expandable main conduit is balloon expandable. 
     
     
         29 . The prosthetic conduit system of  claim 22 , wherein the expandable main conduit is self-expanding. 
     
     
         30 . (canceled) 
     
     
         31 . The prosthetic conduit system of  claim 22 , wherein the main conduit comprises a graft material. 
     
     
         32 . The prosthetic conduit system of  claim 22 , wherein the secondary conduit comprises a graft material. 
     
     
         33 . The prosthetic conduit system of  claim 31 , wherein the graft material comprises ePTFE. 
     
     
         34 . The prosthetic conduit system of  claim 32 , wherein in the graft material comprises ePTFE. 
     
     
         35 . The prosthetic conduit system of  claim 22 , wherein the expandable main conduit comprises a first stent segment at the first open end and a second stent segment at the second open end. 
     
     
         36 . The prosthetic conduit system of  claim 35 , wherein the first stent segment and the second stent segment comprise a single stent extending from the first open end to the second open end. 
     
     
         37 . The prosthetic conduit system of  claim 22 , wherein the attachment portion comprises a flange. 
     
     
         38 . The prosthetic conduit system of  claim 35 , wherein the first stent segment and the second stent segment comprise nitinol. 
     
     
         39 . The prosthetic conduit system of  claim 22 , wherein the expandable secondary conduit comprises a first stent segment at the first open end and a second stent segment at the second open end. 
     
     
         40 . The prosthetic conduit system of  claim 39 , wherein the first stent segment and the second stent segment comprise a single stent extending from the first open end to the second open end. 
     
     
         41 . The prosthetic conduit system of  claim 40 , wherein the first stent segment and the second stent segment comprise nitinol.