Severe pain and the inability to use his right arm

Steven, a football player, complained of severe pain and the inability to use his right arm and shoulder after having been tackled during a game. What would you guess might be his problem?

A nurse is instructing the patient care assistants (PCAs) on transfer techniques. For patients needing to be slid toward the head of the bed, the nurse tells the PCAs to use a draw sheet under the patient’s torso. She tells them to avoid pulling on their hands or arms. Based on your knowledge of the shoulder joint, explain why pulling on the extremities should be avoided.