Final answer:
The client should use an abduction splint between the legs for the first six weeks post-surgery.
Step-by-step explanation:
The client should use an abduction splint between the legs for the first six weeks post-surgery when lying on the nonoperative side or supine. An abduction splint helps to maintain proper hip alignment, prevent hip dislocation, and promote healing. It is a device that keeps the legs spread apart and prevents adduction, which is the crossing of the legs towards the midline of the body.