Occlusion balloon catheter with external inflation lumen

Abstract

Catheters such as guide catheters can be configured to provide distal occlusion, while still providing sufficient interior lumen space for device delivery. Such catheters can also provide a desired level of flexibility, yet can include sufficient column support. A catheter can include an elongate shaft with a lumen, an inflatable compliant balloon disposed over the distal region of the shaft, and an external inflation component.

1 . A balloon catheter having a distal region and a proximal region, the balloon catheter comprising:
 an elongate shaft extending from the distal region to the proximal region and defining a working lumen therebetween, the elongate shaft having a proximal end, a distal end, an inner surface, and an outer surface;   a hub assembly coupled to the proximal end of the elongate shaft, wherein the working lumen is in fluid communication with a lumen of the hub assembly;   an inflatable balloon disposed about a portion of the outer surface of the distal region of the elongate shaft such that the shaft extends through the balloon; and   an inflation component having an inner surface, an outer surface, and an inflation lumen in fluid communication with the balloon, wherein the inflation component is disposed longitudinally along the outer surface of the elongate shaft such that the outer surface of the inflation component is disposed adjacent the outer surface of the elongate shaft;   wherein the inflation component includes a proximal segment and a distal segment, the proximal segment including a metallic hypotube and the distal segment including a polymer tube.   
   
   
       2 . The catheter of  claim 1 , wherein the inflation component extends from the proximal region of the elongate shaft to the balloon, the inflation component having a distal end disposed within the balloon. 
   
   
       3 . The catheter of  claim 1 , wherein the polymer tube is a reinforced braided polymer tube. 
   
   
       4 . The catheter of  claim 1 , wherein the polymer tube is made of an elastic material. 
   
   
       5 . The catheter of  claim 1 , wherein the metallic hypotube is made of nitinol. 
   
   
       6 . The catheter of  claim 1 , wherein the inflation lumen has a smaller diameter than a diameter of the elongate shaft. 
   
   
       7 . The catheter of  claim 1 , wherein the inflation component is attached to the outer surface of the elongate shaft by shrinking a thin wall of polymer around the inflation component and elongate shaft. 
   
   
       8 . The catheter of  claim 1 , wherein a proximal end of the inflation component comprises a sealing member configured to reversibly seal the inflation lumen. 
   
   
       9 . The catheter of  claim 8 , wherein the sealing member is a valve. 
   
   
       10 . A balloon catheter having a distal region and a proximal region, the balloon catheter comprising:
 an elongate shaft extending from the distal region to the proximal region and defining a working lumen therebetween, the elongate shaft having a distal end, an inner surface, and an outer surface;   an inflatable balloon disposed about a portion of the outer surface of the distal region of the elongate shaft such that the elongate shaft extends through the balloon; and   an inflation component including a sleeve having an annular wall defined by an inner surface and an outer surface, wherein the radial distance between the inner surface of the sleeve and the outer surface of the sleeve defines a thickness of the annular wall;   wherein the sleeve is disposed longitudinally about the outer surface of the elongate shaft and extends from the proximal region of the elongate shaft to the inflatable balloon, wherein the inner surface of the sleeve is spaced from the outer surface of the elongate shaft defining an annular inflation lumen in fluid communication with the balloon.   
   
   
       11 . The catheter of  claim 10 , wherein a distal end of the balloon is attached to the distal region of the elongate shaft and a proximal end of the balloon is attached to a distal end of the sleeve. 
   
   
       12 . The catheter of  claim 11 , wherein the sleeve is a single layer polymer, the sleeve being attached to an inflation hub at a proximal end of the sleeve. 
   
   
       13 . The catheter of  claim 10 , wherein the annular inflation lumen has a diameter of about 0.002 inches at the distal end of the sleeve. 
   
   
       14 . The catheter of  claim 10 , wherein the annular inflation lumen has a diameter of about 0.004 inches at a proximal end of the sleeve. 
   
   
       15 . A guide catheter assembly comprising:
 an elongate shaft including a proximal end, a distal end, an outer surface, and an inner surface defining a lumen extending between the proximal end and the distal end;   an inflation component having a proximal end, a distal end, and an inflation lumen extending therebetween, wherein the inflation component is disposed longitudinally adjacent to the outer surface of the elongate shaft;   an inflatable balloon including a proximal end and a distal end, the proximal end of the balloon disposed about both the outer surface of the elongate shaft and the outer surface of the inflation component, the distal end of the balloon disposed about the outer surface of the elongate shaft; and   wherein the inflation lumen of the inflation component is in fluid communication with an interior of the inflatable balloon.   
   
   
       16 . The guide catheter assembly of  claim 15 , further comprising:
 a first hub assembly configured to be coupled to the proximal end of the elongate shaft, wherein when the first hub assembly is coupled to the proximal end of the elongate shaft, the lumen of the elongate shaft is in fluid communication with a lumen of the first hub assembly; and   a second hub assembly configured to be coupled to the proximal end of the inflation component, wherein when the second hub assembly is configured to deliver an inflation media for inflating the balloon.   
   
   
       17 . The guide catheter assembly of claim of  claim 16 , wherein a proximal end of the inflation component includes a sealing member configured to reversibly seal the inflation lumen, wherein the second hub assembly is configured to pierce the sealing member. 
   
   
       18 . The guide catheter assembly of  claim 15 , wherein the inflation component includes a proximal segment and a distal segment extending distal of the proximal segment, wherein the proximal segment includes a metallic hypotube and the distal segment includes a polymer tube extending distal of the metallic hypotube. 
   
   
       19 . The guide catheter assembly of claim of  claim 15 , wherein the polymer tube is a reinforced braided polymer tube. 
   
   
       20 . The guide catheter assembly of claim of  claim 15 , wherein the inflation component has a smaller diameter than a diameter of the elongate shaft.