Hyperventilation should generally be avoided during mechanical ventilatory support. Exceptions to this rule include:
I.trying to calm an agitated patient.II.failure of other methods to reduce intracranial pressure
III.hypokalemia causing cardiac arrhythmias

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Quizplus · Accepted Answer

Hyperventilation should generally be avoided during mechanical ventilatory support, as it can lead to complications such as hypocapnia, decreased cerebral blood flow, and respiratory alkalosis. However, there are some exceptions to this rule. One of these exceptions is when other methods to reduce intracranial pressure have failed, and hyperventilation can be used as a last resort to decrease cerebral blood flow and intracranial pressure. Another exception is when a patient is hypokalemic and experiencing cardiac arrhythmias, and hyperventilation can be used to lower the plasma potassium level by promoting alkalosis and shifting potassium from the extracellular to the intracellular space. Calming an agitated patient is not a valid reason to use hyperventilation during mechanical ventilatory support.

Hyperventilation Should Generally Be Avoided During Mechanical Ventilatory Support