A cardiovascular tourniquet and surgical method of applying the same is disclosed for use in support of a cannula operatively inserted into a blood vessel with a purse string suture. Ends of the suture are drawn to close the blood vessel around the cannula and then passed through a tubular member having...http://www.google.se/patents/US4535770?utm_source=gb-gplus-sharePatent US4535770 - Cardiovascular tourniquet
