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Cannulae designed for cardiopulmonary bypass procedures. These cannulae typically consist of a 20 Fr, 30 cm long tube with an end hole (some include side holes); they are usually inserted via the left femoral vein. Cardiac bypass vena caval cannulae can divert blood from the vena cava into external tubing and a pump, bypassing the heart and lungs completely; they are mostly used in cardiac surgery and in some cardioplasty procedures.
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