Devices and methods for approximating the cross-sectional profile of vasculature having branches

Abstract

This disclosure is related to devices and related methods for isolating a treatment region in a human body from fluid pressure. In various embodiments, an implantable device for isolating a treatment region in a human body from fluid pressure comprises a first elongated segment, and a second elongated segment, and one or more branch segments in fluid communication with one of the first elongated segment and the second elongated segment. The elongated segments have a combined cross section that is substantially conformable to an intraluminal cross section of a body lumen into which they are implanted. A method of installing an implantable medical device into the body of a patient comprises deploying a first elongated segment, deploying a second elongated segment, and deploying one or more branch segments in a target region of a vasculature.

What is claimed is: 
     
         1 . A device comprising:
 a first elongated segment having two opposing ends including a first end and a second end ,the first elongated segment defining a first primary lumen extending between the first end and the second end and comprising a first subsegment and a second subsegment, the first and second subsegments being separately insertable into a body lumen and joinable together during subsequent deployment in the body lumen;   a second elongated segment having two opposing ends including a first end and a second end, the first elongated segment defining a second primary lumen extending between the first end and the second end and comprising a first subsegment and a second subsegment, the first and second subsegments being separately insertable into the body lumen and joinable together during subsequent deployment in the body lumen, a combined cross section of the first elongated segment and second elongated segment being substantially conformable to an intraluminal cross section of the body lumen;   wherein the first and second elongated segments can be positioned and implanted in a longitudinally displaced configuration such that the first end of the first elongated segment is longitudinally displaced from the first end of the second elongated segment; and   a first branch segment engaged to a first side opening in one of the first and second subsegments of the first elongated segment, the first branch segment having a first branch lumen in fluid communication with the first primary lumen.   
     
     
         2 . The device of  claim 1 , wherein a separate cross section of at least one of the first elongated segment and the second elongated segment substantially conforms to another elongated segment in the body lumen. 
     
     
         3 . The device of  claim 1 , wherein the first branch segment anchors the device within the body lumen. 
     
     
         4 . The device of  claim 1 , wherein the first branch segment is engaged to one of the first elongated segment and the second elongated segment by insertion through a fenestration in one of the first subsegment and the second subsegment. 
     
     
         5 . The device of  claim 4 , wherein the first branch segment is further engaged by insertion through an internal branch support. 
     
     
         6 . The device of  claim 1 , wherein the first branch segment is elastically deformable to provide an undeployed device diameter suitable for insertion into the body lumen. 
     
     
         7 . The device of  claim 1 , further comprising a second branch segment attached to a second side opening in one of the first subsegment and the second subsegment of the second elongated segment, the second branch segment having a second branch lumen in fluid communication with the second primary lumen. 
     
     
         8 . The device of  claim 7 , further comprising a third branch segment attached to a third side opening in one of the first subsegment and the second subsegment of the first elongated segment, the third branch segment having a third branch lumen in fluid communication with the first primary lumen. 
     
     
         9 . The device of  claim 8 , further comprising a fourth branch segment attached to a fourth side opening in one of the first subsegment and the second subsegment of the second elongated segment, the fourth branch segment having a fourth branch lumen in fluid communication with the second primary lumen. 
     
     
         10 . The device of  claim 1 , further comprising an nth branch segment attached to an nth side opening in one of the first elongated segment and the second elongated segment, the nth branch segment having an nth branch lumen in fluid communication with one of the first primary lumen and the second primary lumen. 
     
     
         11 . The device of  claim 1 , wherein the device comprises PTFE, or
 wherein the device comprises ePTFE, or   wherein the device comprises an anchor, or   wherein the device comprises an open stent region, or   wherein the device is reconstrainable.   
     
     
         12 . The device of  claim 1 , wherein the first elongated segment and the second elongated segment each have a first end and a second end, and wherein the respective second ends can be displaced from each other within the body lumen. 
     
     
         13 . The device of  claim 1 , wherein the device further comprises a connector configured to maintain at least a portion of an outer surface of one of the first elongated segment and the second elongated segment in proximity to an adjacent peripheral surface so as to reduce fluid flow into an area between the outer surface and the adjacent peripheral surface. 
     
     
         14 . The device of  claim 13 , wherein the connector comprises an anchor. 
     
     
         15 . The device of  claim 13 , wherein the adjacent peripheral surface comprises an end of one of the first elongated segment and the second elongated segment. 
     
     
         16 . An implantable endovascular system comprising:
 a first elongated segment having a first end and a second end opposite the first end, the first elongated segment defining a first primary lumen extending between the first and second ends, and the first elongated segment comprising a first subsegment and a second subsegment, the first and second subsegments of the first elongated segment being separately insertable into a body lumen and joinable together during subsequent deployment in the body lumen; and   a second elongated segment having a first end and a second end opposite the first end, the second elongated segment defining a second primary lumen extending between the first and second ends, and the second elongated segment comprising a first subsegment and a second subsegment, the first and second subsegments of the second elongated segment being separately insertable into the body lumen,   wherein the first and second elongated segments are implantable laterally adjacent with one another such that a cross section of the first elongated segment and a cross-section of the second elongated segment are configured to be positioned adjacent to one another to form a combined cross-section that is substantially conformable to an intraluminal cross section of the body lumen, wherein the second subsegment of the first elongated segment and the second subsegment of the second elongated segment are each configured to be positioned independently relative to each other; and   wherein the first and second elongate segments are implantable in a longitudinally displaced configuration from one another such that the first end of the first elongated segment is longitudinally offset from the first end of the second elongated segment.   
     
     
         17 . The system of  claim 16 , further comprising a first branch segment engaged to a first side opening in one of the first and second subsegments of the first elongated segment, the first branch segment having a first branch lumen in fluid communication with the first primary lumen. 
     
     
         18 . The system of  claim 16 , further comprising means for joining the first and second elongated segments together subsequent to deployment in the body lumen.