Exemplary embodiments are directed to providing a method of preparing an anatomical vessel contained within a tissue bundle for ligation, including positioning a cannula adjacent to the tissue bundle, wherein the positioning is non-penetrating, the cannula including a first extendable member, a second...http://www.google.com/patents/US20040059352?utm_source=gb-gplus-sharePatent US20040059352 - Doppler directed suture ligation device and method
