Engagement catheter devices, systems, and methods to use the same under suctional tissue engagement

Abstract

Engagement catheter devices, systems, and methods to use the same under suctional tissue engagement. A method of the present disclosure comprises the steps of engaging a targeted tissue under suction/vacuum using an engagement catheter, delivering a substance to, into, or through the targeted tissue from within a lumen of the engagement catheter, and injecting a fluid within a different lumen of the engagement catheter to flush the catheter and target tissue area with the fluid, and subsequently suctionally removing the injected fluid from the target area and lumens of the engagement catheter.

1 . A method for flushing area of targeted tissue:
 applying a suction or vacuum through a first lumen of an engagement catheter having a skirt or suction cup coupled thereto and contacting a targeted tissue with the skirt or suction cup such that the targeted tissue is suctionally attached;   delivering a substance to, into, or through the targeted tissue such that some substance remains on the side of the targeted tissue engaged by the engagement catheter;   introducing a fluid through a second lumen of the engagement catheter, such that the introduced fluid contacts the escaped substance; and   suctionally removing the fluid and the remaining substance through the first lumen of the engagement catheter.   
     
     
         2 . The method of  claim 1 , wherein the step of introducing a fluid through a second lumen is performed while the skirt or suction cup is suctionally attached to the targeted tissue. 
     
     
         3 . The method of  claim 1 , wherein suction is applied through the entire procedure. 
     
     
         4 . The method of  claim 1 , wherein the step of introducing a fluid through the second lumen further comprises the step of providing a continuous flow of fluid; and
 the step of suctionally removing the fluid and escaped substance is performed simultaneously with the step of providing a continuous flow of fluid.   
     
     
         5 . The method of  claim 1 , wherein the wherein the step of introducing a fluid through the second lumen further comprises the step of providing an intermittent flow of fluid. 
     
     
         6 . The method of  claim 1 , wherein the introduced fluid is introduced at or near the targeted tissue to flush the environment within the skirt or suction cup. 
     
     
         7 . The method of  claim 1 , wherein the first lumen is disposed radially outside the second lumen. 
     
     
         8 . The method of  claim 1 , wherein the first wherein the second lumen is disposed radially outside the first lumen. 
     
     
         9 . The method of  claim 1 , wherein the second lumen is ring shaped. 
     
     
         10 . The method of  claim 1 , wherein the engagement catheter comprises multiple vacuum ports at a distal end, wherein the vacuum ports are connected to the first lumen. 
     
     
         11 . A method for flushing area of targeted tissue:
 contacting a targeted tissue with a skirt or suction cup coupled to distal end of an engagement catheter;   applying a suction or vacuum through a first lumen of an engagement catheter such that a targeted tissue is suctionally attached to the skirt or suction cup;   delivering a substance to, into, or through the targeted tissue such that some of the substance remains on the side of the targeted tissue engaged by the engagement catheter, wherein said remaining substance is escaped substance;   flushing a fluid through a second lumen of the engagement catheter into the environment within the skirt or suction cup, such that the introduced fluid contacts the escaped substance; and   suctionally removing the escaped substance through the first lumen of the engagement catheter.   
     
     
         12 . The method of  claim 11 , wherein the step of flushing a fluid through a second lumen is performed while the skirt or suction cup is suctionally attached to the targeted tissue. 
     
     
         13 . The method of  claim 12 , wherein the introduced fluid is introduced at or near the targeted tissue to flush the environment within the skirt or suction cup. 
     
     
         14 . The method of  claim 13 , wherein the step of introducing a fluid through the second lumen further comprises the step of providing a continuous flow of fluid; and
 the step of suctionally removing the fluid and escaped substance is performed simultaneously with the step of providing a continuous flow of fluid.   
     
     
         15 . The method of  claim 13 , wherein the wherein the step of introducing a fluid through the second lumen further comprises the step of providing an intermittent flow of fluid. 
     
     
         16 . The method of  claim 12 , wherein the first wherein the first lumen is disposed within the second lumen. 
     
     
         17 . The method of  claim 12 , wherein the first wherein the second lumen is disposed within the first lumen. 
     
     
         18 . A method for flushing an escaped substance from a target tissue:
 contacting a targeted tissue with a skirt or suction cup coupled to an engagement catheter having a first lumen, wherein a vacuum is applied through the first lumen such that the skirt or suction cup forms a reversible seal with the targeted tissue;   delivering a substance to, into, or through the targeted tissue, wherein after delivery an escaped substance is present within the engagement catheter;   introducing a fluid through a second lumen of the engagement catheter such that the fluid contacts the escaped substance; and   removing the introduced fluid and escaped substance from the environment of the skirt or suction cup using the vacuum applied through the first lumen.   
     
     
         19 . The method of  claim 17 , wherein the step of delivering a substance is performed in the second lumen. 
     
     
         20 . The method of  claim 19 , wherein the second lumen is disposed concentrically within the first lumen.