Final answer:
Arm boards should be placed at no more than a 90-degree angle to the operating table in a medical setting to ensure patient safety.
Step-by-step explanation:
When arm boards are used during medical procedures, they should be placed at no more than a 90-degree angle to the table to prevent injury to the patient. Placing arm boards at an excessive angle can increase the risk of pressure on the nerves in the arms, and can lead to complications like neuropathies. It is crucial to follow this guideline to ensure patient safety and comfort during the procedure.