?:definition
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Clamps designed for grasping and/or compressing a cannula without damaging it. These clamps are available in several sizes and configurations according to the cannula to be clamped and the procedure to be performed; they are frequently a flexible plastic mechanism that may be operated by a spring and attached to the cannula. Some cannula clamps are available as an integral part of a specialized device (e.g., a cannula attached to a hemodialysis fistula needle). Cannula clamps are used mainly in procedures (e.g., cardiopulmonary bypass surgery, hemodialysis procedures, oral surgery) that require a temporary closing of the cannula (i.e., the cannula is no longer patent).
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