A patient who was involved in a motor vehicle crash has had a tracheostomy placed to allow for continued mechanical ventilation. How should the nurse interpret the following arterial blood gas results: pH 7.48, PaO₂ 85 mm Hg, PaCO₂ 32 mm Hg, and HCO₃ 25 mEq/L?

Choice A reason: Encouraging the patient to engage in strenuous exercise to improve circulation is not appropriate for someone with thrombocytopenia. Strenuous exercise can increase the risk of injury and bleeding, which is particularly dangerous for patients with a low platelet count.

Choice B reason: Instructing the patient to use an electric razor for shaving is the most appropriate intervention. Thrombocytopenia increases the risk of bleeding, and using an electric razor instead of a traditional blade helps minimize the risk of cuts and subsequent bleeding.

Choice C reason: Teaching the patient to use a water pick for oral hygiene is not recommended for thrombocytopenia patients. Water picks can cause bleeding of the gums, which is a concern for individuals with low platelet counts. Using a soft-bristled toothbrush is safer.

Choice D reason: Requesting an order for subcutaneous heparin to prevent blood clots is not advisable for a thrombocytopenia patient without specific medical indication. Heparin is an anticoagulant, and administering it to someone with low platelets can exacerbate the risk of bleeding.

Choice A reason: While elevated bilirubin levels can indicate liver dysfunction and lead to jaundice, they are not the primary cause of hepatic coma. Bilirubin is a byproduct of red blood cell breakdown and its accumulation can cause yellowing of the skin and eyes.

Choice B reason: Calcium levels, whether high or low, can affect neuromuscular function and cardiac health, but they are not directly associated with causing hepatic coma. Hypercalcemia or hypocalcemia can present with various symptoms, but not typically with hepatic coma.

Choice C reason: Elevated ammonia levels are directly associated with hepatic coma. In patients with severe liver dysfunction, the liver cannot efficiently convert ammonia (a byproduct of protein metabolism) into urea for excretion. The accumulation of ammonia in the blood can cross the blood-brain barrier and lead to encephalopathy, resulting in confusion, altered mental status, and potentially hepatic coma.

Choice D reason: Sodium levels can affect neurological function, particularly with conditions like hypernatremia or hyponatremia. However, these imbalances are not the primary cause of hepatic coma. The direct link to hepatic coma is through elevated ammonia levels.