Fluid Delivery and Treatment Device and Method of Use

Abstract

A medical device system is provided herein which has an elongated, flexible hollow member with an expandable infusion segment attached at the most distal end of the device. The device has a plurality of fluid infusion ports on the expandable infusion segment for delivering an intended fluid to a target site in a body lumen. Additionally, a method is provided herein for infusing an intended fluid to a target site within a body lumen.

1 . A method comprising:
 inserting a catheter into a hollow anatomical structure, the catheter comprising:
 a plurality of expandable arms; wherein each of the plurality of expandable arms comprise:
 an infusion lumen; and 
 at least one infusion port; 
 
   advancing the catheter and the plurality of expandable arms towards a target site;   expanding the plurality of expandable arms to a first diameter; and   delivering a first amount of fluid through the infusion lumen and the infusion port of each of the plurality of expandable arms; wherein the fluid is configured to be delivered towards an undesirable material at the target site.   
     
     
         2 . The method of  claim 1 , wherein the catheter comprises a single catheter lumen in fluid communication with the infusion lumen of each of the plurality of expandable arms. 
     
     
         3 . The method of  claim 1 , wherein the one infusion ports are configured to be skived. 
     
     
         4 . The method of  claim 1 , further comprising the step of:
 manipulating the plurality of expandable arms; wherein the plurality of expandable arms are configured to mechanically disrupt the undesirable material.   
     
     
         5 . The method of  claim 1 , wherein the plurality of expandable arms are configured to form a twist-shaped expandable infusion segment. 
     
     
         6 . The method of  claim 1 , further comprising the step of:
 adjusting the plurality of expandable arms to a second diameter, wherein the second diameter is different than the first diameter.   
     
     
         7 . The method of  claim 1 , further comprising the step of:
 delivering a second amount of fluid through the at least one infusion port.   
     
     
         8 . A method comprising:
 inserting a catheter into a hollow anatomical structure, the catheter comprising:
 a plurality of expandable arms comprised of a shape memory metal; 
   wherein each of the plurality of expandable arms further comprise:
 a dedicated infusion lumen; and 
 at least one infusion port; wherein the at least one infusion port is configured to be on an outer surface of the plurality of expandable arms; 
   placing the catheter and the plurality of expandable arms at a first position of a target site;   expanding the plurality of expandable arms to a first diameter;   delivering a first amount of fluid through the infusion port of each of the plurality of expandable arms; wherein the fluid is configured to be delivered towards an undesirable material at the target site; and   placing the catheter and the plurality of expandable arms at a second position of the target site.   
     
     
         9 . The method of  claim 8 , wherein the fluid is configured to soften the undesirable material for removal from the hollow anatomical structure. 
     
     
         10 . The method of  claim 9 , wherein the fluid is a thrombolytic. 
     
     
         11 . The method of  claim 10 , further comprising the step of:
 aspirating the undesirable material from the hollow anatomical structure.   
     
     
         12 . The method of  claim 11 , wherein the shape memory metal is nitinol. 
     
     
         13 . The method of  claim 12 , further comprising the step of:
 rotating the plurality of expandable arms around a longitudinal axis of the catheter to mechanically disrupt the undesirable material.   
     
     
         14 . The method of  claim 13 , further comprising the step of:
 directing the fluid exiting the at least one infusion port in a direction substantially perpendicular from the longitudinal axis of the catheter.   
     
     
         15 . The method of  claim 14 , wherein the catheter comprises a single catheter lumen in fluid communication with the infusion lumen of each of the plurality of expandable arms. 
     
     
         16 . A method comprising:
 inserting a catheter into a vessel, the catheter comprising:
 a plurality of expandable arms; wherein each of the plurality of expandable arms comprise:
 an infusion lumen; and 
 at least one infusion port; 
 
   advancing the catheter and the plurality of expandable arms towards a thrombus material;   expanding the plurality of expandable arms to a first diameter inside the thrombus material; and   delivering a first amount of fluid through the infusion lumen and the infusion port of each of the plurality of expandable arms; wherein the fluid is configured to be delivered into the thrombus material.   
     
     
         17 . The method of  claim 16 , wherein the at least one infusion port is a skive-shaped port along an outer surface of one of the plurality of expandable arms. 
     
     
         18 . The method of  claim 17 , further comprising the step of:
 simultaneously manipulating the plurality of expandable arms while delivering fluid to the thrombus material.   
     
     
         19 . The method of  claim 18 , wherein the plurality of expandable arms form a helical shaped expandable infusion segment. 
     
     
         20 . The method of  claim 19 , wherein the catheter comprises a single catheter lumen in fluid communication with the infusion lumen of each of the plurality of expandable arms.