How much pressure do you need? A typical wet/dry vac can be reversed by moving the hose from the intake to the outflow port.

BTW...since this procedure is called angioplasty for heart patients, would this then be a "mastioplasty" or an "angiomasty"? <img src="http://www.catsailor.com/forums/images/graemlins/smile.gif" alt="" />