Pancreatic stent drainage system

Abstract

The present invention relates to a medical device, for pancreas, equipped with drainage feature. The medical device includes a stent having an exterior surface, a proximal end and a distal end. The medical device further includes a drainage tube helically wrapped around the stent. The drainage tube includes an external surface, an internal surface, a proximal end, and a distal end. The external surface of the drainage tube is designed with a plurality of holes. The pluralities of holes are connected to the internal surface via a lumen. The plurality of holes can be configured to direct the fluid from side walls of pancreas and bring it out through lumen to avoid occlusion of the side walls in pancreas.

1 - 17 . (canceled) 
     
     
         18 . A medical device comprising:
 a stent having a proximal end, a distal end, a central region extending therebetween, and an outer and inner surface, wherein the stent defines a lumen extending therethrough;   a covering disposed on one or both of the outer and inner surface of at least a portion of the central region; and   a drainage tube having a proximal end, a distal end, an internal surface, and an external surface, the external surface having a plurality of drainage holes connecting to the internal surface, such that the plurality of holes are configured to contact the body lumen wall, wherein the drainage tube wraps around the outer surface of the stent.   
     
     
         19 . The medical device of  claim 18 , wherein the covering is disposed over some, but not all, of the central region. 
     
     
         20 . The medical device of  claim 18 , wherein the covering is disposed on the outer surface of the central region. 
     
     
         21 . The medical device of  claim 18 , wherein the covering is disposed on an inner surface of the central region. 
     
     
         22 . The medical device of  claim 18 , wherein the proximal end of the drainage tube is positioned adjacent to the proximal end of the stent. 
     
     
         23 . The medical device of  claim 18 , wherein the drainage tube helically wraps around the outer surface of the stent. 
     
     
         24 . The medical device of  claim 18 , wherein at least one of the distal and proximal ends of the stent is flared. 
     
     
         25 . A medical device comprising:
 a stent having a proximal end, a distal end, and an outer surface, wherein the stent defines a lumen extending therethrough; and   a drainage tube having a proximal end, a distal end, an internal surface, and an external surface, the external surface having a plurality of drainage holes connecting to the internal surface, such that the plurality of holes are configured to contact the body lumen wall, wherein the drainage tube wraps around the outer surface of the stent, wherein each drainage hole of the plurality of drainage holes is defined by an angular coordinate with respect to a central axis of the drainage tube.   
     
     
         26 . The medical device of  claim 25 , wherein the plurality of drainage holes are defined by the same angular coordinate. 
     
     
         27 . The medical device of  claim 25 , wherein at least two drainage holes of the plurality of drainage holes are defined by an angular coordinate different than the angular coordinate of the other drainage holes. 
     
     
         28 . The medical device of  claim 25 , wherein the drainage tube wraps around the outer surface of the stent. 
     
     
         29 . The medical device of  claim 28 , wherein the drainage tube helically wraps around the outer surface of the stent. 
     
     
         30 . The medical device of  claim 25 , wherein at least one of the distal and proximal ends of the stent is flared. 
     
     
         31 . A medical device comprising:
 a stent having a proximal end, a distal end, and an outer surface, wherein the stent defines a lumen extending therethrough; and   a drainage tube having a proximal end, a distal end, an internal surface, and an external surface, the external surface having a plurality of drainage holes connecting to the internal surface, wherein the drainage tube wraps around the outer surface of the stent, wherein the drainage tube has a length as it wraps around the outer surface.   
     
     
         32 . The medical device of  claim 31 , wherein the plurality of drainage holes are uniformly spaced along the length. 
     
     
         33 . The medical device of  claim 31 , wherein the plurality of drainage holes are non-uniformly spaced along the length. 
     
     
         34 . The medical device of  claim 31 , wherein the drainage tube wraps around the outer surface of the stent. 
     
     
         35 . The medical device of  claim 34 , wherein the drainage tube helically wraps around the outer surface of the stent. 
     
     
         36 . The medical device of  claim 31 , wherein at least one of the distal and proximal ends of the stent is flared.