Dual lumen microcatheter

Abstract

The present disclosure relates to the field of endovascular treatment. More particularly, the present invention is a tool designed to implement an endovascular treatment by the implementation of two or more lumens on a microcatheter and/or having a side hole in a single lumen. The present invention ameliorates the medical difficulty associated with making a good plug to prevent reflux of liquid embolic along catheter and maximize distal penetration, usually in treatment of arteriovenous malformations (AVM) and arteriovenous fistulas (AVF).

1 - 26 . (canceled) 
     
     
         27 . An intravascular catheter adapted to deliver liquid embolics, the catheter comprising at least a primary proximal end hole and a secondary proximal end hole, a primary distal hole at a distal end of said catheter in communication with a dedicated separate primary lumen in communication with the primary proximal hole, and a secondary distal hole proximal to said distal end of said catheter and proximal of the primary distal hole and in communication with a dedicated separate secondary lumen in communication with the secondary proximal hole, the secondary lumen ends proximal of the primary lumen, wherein the secondary distal hole is a side hole in communication with the secondary lumen and configured for exit of the liquid embolics flowing through the secondary lumen to form a plug around the catheter. 
     
     
         28 . The catheter of  claim 27 , further including a luer-lock disposed at a proximal end of at least one of said at least two dedicated separate lumens at one of at least two proximal end holes. 
     
     
         29 . The catheter of  claim 27 , wherein said secondary distal hole is disposed approximately between 5 mm and 30 mm proximal to said primary distal hole. 
     
     
         30 . The catheter of  claim 27 , further including a balloon, the balloon disposed proximal of the side hole, and an additional lumen to inflate and deflate the balloon, wherein the balloon is in position proximal to said secondary distal hole to arrest flow of the liquid embolics while forming a plug. 
     
     
         31 . The catheter of  claim 30 , further comprising a radiopaque marker on the balloon. 
     
     
         32 . The catheter of  claim 27 , wherein the catheter is enclosed in an intermediate catheter, said intermediate catheter acting as a support catheter for delivery of said catheter therethrough. 
     
     
         33 . The catheter of  claim 32 , wherein the intermediate catheter has a balloon disposed thereon to arrest flow while forming the plug. 
     
     
         34 . The catheter of  claim 27 , further comprising a second side hole proximal of the secondary distal hole. 
     
     
         35 . The catheter of  claim 34 , wherein the catheter is enclosed in an intermediate catheter, said intermediate catheter acting as a support catheter for delivery of said catheter therethrough. 
     
     
         36 . The catheter of  claim 35 , wherein the intermediate catheter has a balloon disposed thereon to arrest flow while forming the plug. 
     
     
         37 . The catheter of  claim 27 , further comprising a radiopaque marker at the distal end of the catheter. 
     
     
         38 . The catheter of  claim 34 , further comprising a radiopaque marker at the distal end of the catheter. 
     
     
         39 . The catheter of  claim 27 , further comprising a radiopaque marker at the site of the side hole. 
     
     
         40 . The catheter of  claim 27 , wherein the liquid embolics is a tissue adhesive. 
     
     
         41 . A method of using the catheter of  claim 27 , comprising injecting the liquid embolics for arteriovenous malformation or arteriovenous fistula treatment. 
     
     
         42 . A method of using the catheter of  claim 27 , comprising injecting the liquid embolics to arrest flow of blood during thrombectomy to minimize instances of distal emboli. 
     
     
         43 . A method of using the catheter of  claim 27 , comprising inflating a balloon to temporarily stop flow during formation of the plug. 
     
     
         44 . A method of using the catheter of  claim 32 , comprising injecting the liquid embolics for arteriovenous malformation or arteriovenous fistula treatment. 
     
     
         45 . A method of using the catheter of  claim 32 , comprising injecting the liquid embolics to arrest flow of blood during thrombectomy to minimize instances of distal emboli. 
     
     
         46 . The catheter of  claim 27 , further comprising a balloon on the catheter. 
     
     
         47 . The catheter of  claim 27 , further comprising a detachment site capable of detaching a portion of the catheter between the detachment site and the distal end of the catheter. 
     
     
         48 . The catheter of  claim 47 , further comprising a balloon proximal of the detachment site. 
     
     
         49 . The catheter of  claim 27 , wherein the catheter is devoid of a balloon. 
     
     
         50 . The catheter of  claim 27 , in combination with an intermediate catheter through which the catheter is delivered. 
     
     
         51 . The catheter of  claim 27 , in combination with an intermediate catheter through which the catheter is delivered, the intermediate catheter having a balloon mounted thereon. 
     
     
         52 . The catheter of  claim 50 , further comprising a detachment site capable of detaching a portion of the catheter between the detachment site and the distal end of the catheter. 
     
     
         53 . The catheter of  claim 51 , further comprising a detachment site capable of detaching a portion of the catheter between the detachment site and the distal end of the catheter.