The removal of orthopaedic casts involves the use of an oscillating power equipment termed a "cast saw." A cast saw cuts material by rapidly oscillating or vibrating the blade back and forth over a very small angle, as opposed to a circular saw with a rotating blade. A cast spreader is usually used in conjunction with this instrument. When used over bony prominences, the Cast Saw Devices blade can lacerate the skin even if it frequently makes contact with the patient's skin without actually cutting it. Because of the design, soft tissues like skin can slide back and forth with the blade of the saw as it cuts through hard materials like plaster or fibreglass while distributing shear forces and avoiding injury. It is customary to practice a cast saw demonstration before using one. Routine process taking the cast off.
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