The present invention is directed to a blood aspiration system that is configured to enable various types of aspiration through a working lumen of a catheter. The blood aspiration system facilitates natural aspiration by providing a circuit between a patient's arterial and venous vasculature, and also...http://www.google.fr/patents/US7223253?utm_source=gb-gplus-shareBrevet US7223253 - Blood aspiration system and methods of use
