Isovolumic Phelobotomy

It appears there may be a misunderstanding or a typo in your question. "Isovolumic phlebotomy" doesn't appear to be a recognized medical procedure or term. Phlebotomy typically refers to the process of drawing blood from a patient for diagnostic testing or therapeutic purposes.

If you meant to ask about a different medical procedure or term related to blood or phlebotomy, please provide additional context or clarify your question, and I'd be happy to assist you further.