Why should a nurse support a client's left arm on a pillow after a stroke?

Supporting the client's left arm on a pillow after a stroke is primarily aimed at preventing shoulder subluxation. Following a stroke, there can be weakness or paralysis on one side of the body, which can lead to improper joint alignment. The shoulder joint may become unstable due to muscle weakness and lack of support, increasing the risk of subluxation—a condition where the upper arm bone partially dislocates from the shoulder socket.

By using a pillow, the nurse helps maintain proper positioning of the arm and shoulder, providing necessary support that helps to stabilize the joint. This also reduces the strain on the surrounding muscles, tendons, and ligaments, which may be compromised due to the neurological impact of the stroke.

While promoting circulation, providing comfort, and reducing edema are important considerations in stroke care, the direct prevention of shoulder subluxation through proper arm support is the primary reason for placing the arm on a pillow. Ensuring that the joint remains in a stable position is crucial for maintaining optimal function and preventing further complications.