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Limb restraints are commonly used in critical care settings primarily to prevent patients from inadvertently removing life-sustaining devices such as endotracheal tubes, which is referred to as self-extubation. In critical care, maintaining the airway is essential, and patients who may be agitated, confused, or unable to comprehend their medical situation pose a risk of pulling out their tubes, resulting in immediate complications such as respiratory failure.

Limb restraints are specifically effective in restricting movements of the arms and legs, providing healthcare workers with a balance between patient safety and comfort. Using these restraints allows care teams to monitor patient activity and intervene promptly if necessary.

Chest restraints and vest restraints can restrict movement but may not specifically target the concern of preventing self-extubation as effectively as limb restraints. Bed rails, while helpful in maintaining safety and preventing falls, do not physically restrict the arms or legs and will not prevent a patient from reaching up to remove an endotracheal tube. Therefore, limb restraints are the most appropriate choice in this context for managing the risk of self-extubation in critically ill patients.