Which of the following step is least useful in the management of TOF: March 2010

Ans. C: Administer 100% oxygen Palliative treatment consists of anastomosis of a systemic aery with pulmonary aery so as to increase the pulmonary blood flow and thus increase the amount of oxygenated blood reaching the systemic circulation. Definitive treatment consists of Modified Blalock-Taussig shunt, which consists of subclan aery to pulmonary aery anastomosis using a Goretex graft. Humidified oxygen is used only in anoxic spells.