FLEXIBLE LOW COMPLIANCE EXTENSION TUBING FOR BALLOON INFLATION

摘要

A controlled volume inflation-deflation device to inflate a balloon to occlude a blood vessel by dialing a knob that locks at rotational positions to locate a plunger at equally spaced locations within a syringe of the inflation-deflation device. The inflation-deflation device includes a releasable latch to lock the proximal and distal housings together to hold the plunger forward for occlusion, and to separate and hold the proximal and distal housings to retract the plunger for perfusion. When the inflation-deflation device is returned to the latched position, the balloon is re-inflated to its previous occlusive diameter. Also, an extension tube made of a lower modulus outer material co-extruded over and miscible with a higher modulus inner material may be used to produce a suitably low compliance extension tube for the inflation-deflation device. The balloon may have tapered ends and a cylindrical center portion so that it increases by more equal increments in outer diameter in response to incremental equal increases in inflation volume.

主权项

1. A method comprising:
advancing a catheter percutaneously through a blood vessel to a region of interest, the catheter having a proximal end, a distal end, and an exterior surface at or adjacent the distal end of the catheter axially coupled to a balloon; locating a plunger at a first location in a syringe tube having a fluid output coupled to a fluid input of the catheter; then pushing a button to unlock the plunger position in the syringe tube; then
a) rotating a knob of the syringe to push the plunger to a second location in the syringe tube to inflate the balloon to an inflation diameter;b) reading a pressure display to determine a pressure in the syringe;c) testing for occlusion of the blood vessel at the region of interest; if the occlusion is not attained, repeating a), b) and c) to attain occlusion; and performing a treatment of the blood vessel at the region of interest.