Medicant delivery device

Abstract

An example medical instrument for creating tracks within target tissue. Medicants could be injected into these tracks for diffusion into the surrounding tissue. An exemplary medical device includes a first tissue penetrating device, a second tissue penetrating device and a handle. The handle includes a first component connected to the first tissue penetrating device and a second component connected to the second tissue penetrating device. When the second component is at a first position relative to the first component, the second tissue penetrating device is in a non-track creation configuration. When the second component is at a second position relative to the first component, the second tissue penetrating device is in a track creation configuration. The second tissue penetrating device is slidably received within the first tissue penetrating device.

What is claimed is: 
     
         1 . A medical device comprising:
 a first tissue penetrating device;   a second tissue penetrating device configured to extend from the first penetrating device, in an extended state the second tissue penetrating device forms a coil, in a retracted state the second tissue penetrating device conforms to the first tissue penetrating device; and   a handle comprising:
 a first component connected to the first tissue penetrating device; 
 a second component connected to the second tissue penetrating device; and 
 a fluid delivery component configured to allow fluid to pass into the first tissue penetrating device, 
 wherein when the second component is at a first position relative to the first component, the second tissue penetrating device is in an undeployed configuration, 
 wherein when the second component is at a second position relative to the first component, the second tissue penetrating device is in a deployed configuration. 
   
     
     
         2 . The medical device of  claim 1 , wherein the first and second tissue penetrating devices are configured to repeatedly allow the second tissue penetrating device to extend from and retract into the first tissue penetrating device. 
     
     
         3 . A method comprising:
 a) inserting a hollow needle into a target;   b) deploying a coil from within the hollow needle;   c) retracting the coil back into the hollow needle; and   d) advancing medicant solution through the hollow needle to the target.   
     
     
         4 . The method of  claim 3 , further comprising:
 before d) performing the following one or more times;
 at least one of retracting or advancing the hollow needle into a different location of the target; and 
 repeating b) and c). 
   
     
     
         5 . The method of  claim 3 , wherein the coil is in a non-coiled configuration when within the hollow needle.