A switch for selectively directing fluid to either one of two catheters and for inflating a "manually" inflatable balloon of one of the catheters when fluid is directed to that catheter. The switch includes a valve mechanism that is operatively linked with a balloon inflation mechanism such that ...http://www.google.com/patents/US5755686?utm_source=gb-gplus-sharePatent US5755686 - Antegrade/retrograde switch for cardioplegia cannulae
