Which change would NOT increase the rate of inhalational induction?

The choice that would not increase the rate of inhalational induction is the utilization of an inotropic infusion. Inotropic agents primarily influence the heart's contractility and cardiac output rather than the dynamics of inhalational anesthetic uptake and distribution.

Inhalational induction refers to the process of administering anesthesia agents through inhalation. Factors that typically increase the rate of induction include enhancing the agent's delivery to the alveoli and improving its absorption into the bloodstream. Increased alveolar ventilation, for example, raises the concentration gradient between the alveoli and the blood, leading to faster absorption of the anesthetic agent.

The substitution of Sevoflurane for Isoflurane is also relevant because Sevoflurane has a lower blood-gas partition coefficient, which means it is less soluble in blood compared to Isoflurane. This characteristic results in quicker delivery to the brain and, therefore, a faster induction of anesthesia.

Delivering anesthesia at different altitudes can affect the partial pressures of gases and potentially alter the anesthetic induction time, but these factors are more complex and variable.

Thus, using an inotropic infusion does not directly influence pulmonary ventilation or gas exchange and does not enhance inhalational induction rates like the other options do.