Correct option is B
Explanation: The correct answer is placing the infant in a knee-chest (squatting) position, which is the most immediate nursing intervention during a hypercyanotic spell in Tetralogy of Fallot.
Information Booster:
· Knee-chest position increases systemic vascular resistance.
· Reduces right-to-left shunting.
· Improves pulmonary blood flow and oxygenation.
· Common in “Tet spells” triggered by crying or feeding.
Additional Knowledge: (a) Oxygen may be given but is not the most immediate or effective first step. (c) CPR is not indicated unless cardiac arrest occurs. (d) Echocardiogram/defibrillator is not an emergency first-line intervention in a Tet spell.
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