What position is recommended for a hypoxic cyanotic infant with Tetralogy of Fallot during a spell?

What position is recommended for a hypoxic cyanotic infant with Tetralogy of Fallot during a spell?

• A. Prone
• B. Supine With Legs Extended
• C. Knee-Chest
• D. Lateral Decubitus

Answer: (C)

During a cyanotic spell in Tetralogy of Fallot, the goal is to increase blood flow to the lungs by reducing the right-to-left shunt across the ventricular septal defect. The knee-chest position achieves this by increasing systemic vascular resistance, which makes it more difficult for blood to shunt from the right ventricle to the aorta. As a result, more blood is directed toward the lungs through the pulmonary arteries, improving oxygenation and relieving the spell. This position is a classic first-line nonpharmacologic maneuver for a hypoxic cyanotic infant with TOF. Other positions don’t reliably raise systemic vascular resistance to the same degree or redirect blood flow to the lungs, so they’re less effective in this acute scenario.

During a cyanotic spell in Tetralogy of Fallot, the goal is to increase blood flow to the lungs by reducing the right-to-left shunt across the ventricular septal defect. The knee-chest position achieves this by increasing systemic vascular resistance, which makes it more difficult for blood to shunt from the right ventricle to the aorta. As a result, more blood is directed toward the lungs through the pulmonary arteries, improving oxygenation and relieving the spell. This position is a classic first-line nonpharmacologic maneuver for a hypoxic cyanotic infant with TOF. Other positions don’t reliably raise systemic vascular resistance to the same degree or redirect blood flow to the lungs, so they’re less effective in this acute scenario.