Final answer:
The primary reason a trochanter roll is placed alongside a hemiplegic patient's legs when positioning them in the supported Fowler's position is to reduce the risk of a fall while the side rails are down. Therefore, the correct option is C.
Step-by-step explanation:
The primary reason a trochanter roll is placed alongside a hemiplegic patient's legs when positioning them in the supported Fowler's position is to reduce the risk of a fall while the side rails are down.
This roll helps to prevent the legs from crossing or falling out to the side, which could lead to a fall or injury. It provides stability and support to the patient's legs, ensuring their safety while in a semi-sitting position.
By placing the trochanter roll alongside the patient's legs, it serves as a physical boundary and reminder for both the patient and caregivers to maintain proper positioning to prevent falls.