MULTI-STAGE BALLOON CATHETER

摘要

A multistage balloon catheter that uses a single lumen to inflate a balloon in stages is disclosed. A fluid port provides fluid communication from an inflation lumen in the balloon catheter to the inner volume of a distal balloon. The distal balloon expands as fluid in delivered to the inner volume of the distal balloon. Once inflated, the pressure continues to rise until a threshold pressure is exceeded. A pressure sensitive inflation valve provides fluid communication into an inner volume of a second balloon disposed at least partially proximal to the distal balloon. The pressure sensitive valve allows fluid communication into the second balloon once the threshold pressure is reached in the first balloon thereby inflating the second balloon.

主权项

1. A balloon catheter assembly comprising:
a catheter having a proximal end and a distal end; a first balloon disposed at a distal portion of the catheter, the first balloon having a first interior volume; a second balloon disposed at least partially proximal to the first balloon, the second balloon having a second interior volume; a pressure actuated inflation valve operably coupled to the second balloon, the pressure actuated inflation valve providing fluid communication through the inflation valve to the second interior volume when a threshold fluid pressure is exceeded in the first balloon; and a lumen extending from the proximal end of the catheter to the distal end of the catheter, the lumen being in fluid communication with the first interior volume.