A client is admitted following a motor vehicle collision.
When assessing the client's level of consciousness, the nurse notes that the client no longer responds to commands.
The nurse initiates a painful stimulus and the client responds by pulling the arms inward with elbows and wrists flexed and extending the legs with the toes pointed downward.
Which action should the nurse implement?

The level of hypoxemia that the child may have experienced during the submersion depends on several factors, but the most important ones are:

• The **temperature of water**: Cold water can induce a diving reflex, which lowers the heart rate and oxygen consumption, and may protect the brain from hypoxic injury. Cold water can also cause laryngospasm, which prevents water aspiration but also impairs gas exchange.
• The **amount of time the child was submerged**: The longer the submersion, the more severe the hypoxemia and the higher the risk of brain damage and death. The survival rate decreases significantly after 5 minutes of submersion.

The other factors are less relevant or not directly related to the level of hypoxemia:

• The **weight of the child**: This may affect the buoyancy and the ability to float or swim, but not the oxygen consumption or gas exchange during submersion.
• The **oxygen concentration of the ambient air**: This may affect the pre-submersion oxygen saturation, but not the rate of oxygen depletion or gas exchange during submersion.
• The **witnessing of the fall into the pool**: This may affect the time to rescue and resuscitation, but not the level of hypoxemia during submersion.

Choice D rationale:

"Antiembolism stockings on, leg exercises performed hourly" indicates that activities to prevent postoperative venous stasis were performed correctly. This combination ensures both mechanical prophylaxis (antiembolism stockings) and physical activity (leg exercises) to prevent blood clots in postoperative patients.

Choice A rationale:

"Leg exercises not performed because of placement of antiembolism hose" is not the correct approach. Leg exercises should be encouraged even when antiembolism stockings are worn, as they have complementary benefits in preventing venous stasis.

Choice B rationale:

"Antiembolism stockings removed hourly during leg exercises" is not recommended. Antiembolism stockings should be worn continuously to be effective in preventing venous stasis.

Choice C rationale:

"Client demonstrates the ability to move all extremities well" is a good sign of the client's mobility but does not confirm that the specific activities to prevent postoperative venous stasis were performed correctly. The combination of stockings and leg exercises is more comprehensive.