During induction of general anesthesia, administration of oxygen with high concentration of nitrous oxide and halothane hastens the uptake of halothane, this is known as

During induction ofgeneral anesthesia, when a large volume of a gas (nitrous oxide) is taken up from alveoli into pulmonary capillary blood, the concentration of gases remaining in the alveoli is increased. This results in effects known as the second gas effect. These effects occur because of the contraction of alveolar volume associated with the uptake of the nitrous oxide. this effect makes speed of induction fast