A nurse is caring for an infant whose screening test reveals a potential diagnosis of sickle cell disease. Which of the following tests should the nurse expect the provider to prescribe to distinguish whether the infant has sickle cell disease or sickle cell trait?

A. Initiate a 2 L/day fluid restriction: Fluid intake should be increased, not restricted, during a sickle cell crisis to help prevent dehydration and improve circulation.

B. Encourage exercise: Exercise is not recommended during a sickle cell crisis as it can worsen symptoms and lead to more complications.

C. Assist with administering a blood transfusion: Blood transfusions are a common treatment during a sickle cell crisis to help increase the number of healthy red blood cells and decrease the risk of further complications.

D. Withhold opioids to avoid dependence: Pain management is essential in a sickle cell crisis, and withholding opioids could lead to unnecessary suffering. Opioids should be given based on the severity of the pain.

A. Squatting increases the return of venous blood flow to the heart: Squatting increases systemic vascular resistance and venous return, which helps to increase oxygenation in children with Tetralogy of Fallot, as it reduces the right-to-left shunting and increases blood flow to the lungs.

B. Squatting in common resting position when a child is tachycardic: While squatting can be used to manage symptoms, this answer is misleading as squatting specifically helps in increasing blood flow and decreasing the symptoms of cyanosis in Tetralogy of Fallot, not just during tachycardia.

C. Squatting decreases arterial blood flow away from the heart: Squatting actually increases blood flow to the heart and lungs by increasing systemic vascular resistance.

D. Squatting increases the workload of the heart: Squatting helps reduce the workload on the heart in Tetralogy of Fallot by improving oxygenation and decreasing cyanosis.