Restraints are intentional restrictions of a person's movement and are used as a last resort to prevent harm. They include physical, chemical, and environmental measures. Nurses must get a doctor's order and consent before using the least restrictive restraint for the shortest time. They must monitor the restrained person closely every 15 minutes for safety and comfort, and document their care every two hours. While restraints may protect from harm, evidence does not support their effectiveness and alternative approaches are often safer and less traumatic.