Patent ID: 7458968

Claim:
A catheter for cooling or freezing neuroaxis structure targets, said catheter comprising: a. a catheter body having a proximal end and a distal end and a dorsal side and a ventral side wherein said catheter body is a tube having an interior and a septum formed in said tube interior, said septum dividing said tube interior into a dorsal chamber on said dorsal side and a ventral chamber on said ventral side and wherein neither chamber is disposed within the other chamber; b. an expandable portion located at the distal end of the dorsal chamber that can be transitioned from a first state to a second state in order to secure the distal end of said catheter body in position adjacent to a neuroaxis structure target; c. a delivery tube disposed within said ventral chamber for internally delivering a coolant fluid to the ventral chamber of said ventral side of said distal end of said catheter body and wherein said septum prevents said coolant from entering said dorsal side and returns said coolant fluid to said proximal end of said catheter body without said coolant fluid coming into direct contact with said neuroaxis structure targets; and d. wherein said cooling or freezing effect is adapted to be delivered to neuroaxis structure targets located on the ventral side of said catheter and not to tissues located on the dorsal side of said catheter and wherein the angle of said distal end of said catheter can be changed relative to the body of the catheter.