Orange’s Cooley Anastomosis Clamp is designed for use in cardiothoracic surgical procedures in which an anastomotic connection is to be formed between two vessels and blood flow needs to be reduce significantly via clamping. This instrument features jaws that are calibrated at 5 mm intervals making them ideally suited to give accurate measurement information during a surgical procedures. Additionally, this clamp features a slightly looped, u-shaped clamp to provide optimal gripping capacity but also maintaining which hold consistently throughout the procedure.