Weeping balloon catheter with drug delivery balloon in fluid communication with combination lumen

Abstract

A weeping balloon catheter includes a catheter having an elongate tubular body defining an inflation lumen and a combination lumen that terminates at an open distal end of the elongate tubular body. A dilation balloon is disposed at a distal end of the elongate tubular body and is in fluid communication with the inflation lumen. A drug delivery balloon is disposed at least partially over the dilation balloon and includes at least one drug release opening through an outer wall of the drug delivery balloon. The drug delivery balloon is in fluid communication with the combination lumen through a sidewall opening of the elongate tubular body.

What is claimed is: 
     
         1 . A weeping balloon catheter comprising:
 a catheter having an elongate tubular body that defines exactly two lumens, and a first lumen of the exactly two lumens terminates at an open distal end of the elongate tubular body;   a dilation balloon mounted on the elongate tubular body and in fluid communication with one of the exactly two lumens;   a drug delivery balloon disposed at least partially over the dilation balloon and including at least one drug release opening through an outer wall of the drug delivery balloon, and the drug delivery balloon being in fluid communication with an other one of the exactly two lumens.   
     
     
         2 . The weeping balloon catheter of  claim 1  wherein the first lumen is the other one of the exactly two lumens in fluid communication with the drug delivery balloon. 
     
     
         3 . The weeping balloon catheter of  claim 1  including a wire guide positioned in the first lumen. 
     
     
         4 . The weeping balloon catheter of  claim 3  wherein the wire guide includes a distal segment extending distally from the open distal end of the elongate tubular body; and a proximal segment positioned in the first lumen; and
 at least a portion of the distal segment has a larger diameter than the proximal segment positioned in the first lumen. 
 
     
     
         5 . The weeping balloon catheter of  claim 3  wherein the wire guide has a hollow interior that defines a portion of an infusion pathway. 
     
     
         6 . The weeping balloon catheter of  claim 1  wherein the first lumen is the other one of the exactly two lumens in fluid communication with the drug delivery balloon;
 a wire guide positioned in the first lumen; and 
 a seal connected to a proximal segment of the elongate tubular body and being in sealing contact with the wire guide. 
 
     
     
         7 . A weeping balloon catheter comprising:
 a catheter having an elongate tubular body that defines an inflation lumen and a combination lumen;   a dilation balloon mounted on the elongate tubular body in fluid communication with the inflation lumen;   a drug delivery balloon disposed at least partially over the dilation balloon and including at least one drug release opening through an outer wall of the drug delivery balloon, and the drug delivery balloon being in fluid communication with the combination lumen; and   a wire guide received in the combination lumen;   wherein the wire guide at least partially defines an infusion path to the drug delivery balloon, and the wire guide at least partially defines a reduced clearance distally from the infusion path to reduce leakage of a liquid from the infusion path out of an open distal end of the combination lumen.   
     
     
         8 . The weeping balloon catheter of  claim 7  wherein the wire guide includes a distal segment extending distally from the open distal end of the elongate tubular body; and a proximal segment positioned in the combination lumen; and
 at least a portion of the distal segment has a larger diameter than the proximal segment positioned in the combination lumen. 
 
     
     
         9 . The weeping balloon catheter of  claim 8  including a seal connected to a proximal segment of the elongate tubular body and being in sealing contact with the wire guide. 
     
     
         10 . The weeping balloon catheter of  claim 9  wherein the infusion path is defined partially by an outer surface of the wire guide. 
     
     
         11 . The weeping balloon catheter of  claim 7  wherein the wire guide has a hollow interior that defines a segment of the infusion path. 
     
     
         12 . The weeping balloon catheter assembly of  claim 7  wherein a segment of the infusion path is a side port defined by the elongate tubular body and fluidly connecting the combination lumen to the drug delivery balloon. 
     
     
         13 . A method of delivering a liquid to a target site, comprising the steps of:
 sliding a weeping balloon catheter over a wire guide to the target site;   inflating a dilation balloon of the weeping balloon catheter; and   moving a liquid along a surface of the wire guide, into a drug delivery balloon of the weeping balloon catheter, and to the target site through a drug release opening through an outer wall of the drug delivery balloon.   
     
     
         14 . The method of  claim 13  wherein the wire guide is received in a combination lumen of the weeping balloon catheter;
 reducing leakage of the liquid through an open distal end of the combination lumen with an interaction between the wire guide and a distal segment of the weeping balloon catheter. 
 
     
     
         15 . The method of  claim 13  wherein the moving step includes moving the liquid along an outer surface of the wire guide. 
     
     
         16 . The method of  claim 13  wherein the wire guide is received in a combination lumen of the weeping balloon catheter;
 wherein the wire guide includes a distal segment extending distally from the open distal end of the combination lumen, and a proximal segment positioned in the combination lumen; and 
 at least a portion of the distal segment has a larger diameter than the proximal segment positioned in the combination lumen. 
 
     
     
         17 . The method of  claim 13  wherein the inflating step is performed prior to the moving step. 
     
     
         18 . The method of  claim 17  wherein the moving step includes moving the liquid along an outer surface of the wire guide;
 the wire guide is received in a combination lumen of the weeping balloon catheter; 
 wherein the wire guide includes a distal segment extending distally from the open distal end of the combination lumen, and a proximal segment positioned in the combination lumen; and 
 at least a portion of the distal segment has a larger diameter than the proximal segment positioned in the combination lumen. 
 
     
     
         19 . The method of  claim 18  wherein the moving step includes moving the liquid from the combination lumen, through a side port and into the drug delivery balloon. 
     
     
         20 . The method of  claim 19  including a step of contacting a seal with the wire guide at a proximal fitting of the weeping balloon catheter.