An infant with tetralogy of Fallot is experiencing a tet spell involving cyanosis and dyspnea. In which position should the infant be placed?

A. Prone: Offers no circulatory or respiratory benefit during a tet spell. B. Knee-chest: This position increases systemic vascular resistance, reducing the right-to-left shunt and improving oxygenation. It’s the standard first response for a tet spell. C. Trendelenburg's: Can worsen respiratory distress and venous return; not used in cyanotic spells. D. Fowler's: May help breathing generally but is less effective than the knee-chest position for managing a tet spell.