A nurse is preparing to apply a thigh-length sequential compression device for a client who is postoperative. Which of the following actions should the nurse take?

A. Wrap the sleeve loosely around the client's lower leg: The sleeve should fit snugly but comfortably to ensure effective compression. Wrapping it too loosely reduces efficacy in promoting venous return and preventing deep vein thrombosis. Proper fit is essential for device function and patient safety. B. Measure the circumference of the client's upper leg: Measuring the thigh circumference ensures the correct sleeve size is selected, which is crucial for effective compression and prevention of pressure injury. Accurate sizing allows the device to deliver appropriate pressure without causing discomfort or circulatory compromise. C. Turn on the mechanical unit prior to applying the sleeve: The device should remain off until the sleeve is properly positioned on the client. Activating it beforehand may result in improper inflation, skin injury, or ineffective compression. Turning it on too early can also startle the client and reduce comfort. D. Position the client prone to apply the device: The client should be supine or with legs slightly elevated when applying a thigh-length sequential compression device. Prone positioning is unnecessary, uncomfortable, and can complicate proper sleeve placement. Supine positioning facilitates correct alignment and device effectiveness.