What should be done if pulse oximetry is below 94% in an allergic reaction?

When pulse oximetry readings fall below 94% during an allergic reaction, administering supplemental oxygen is the correct response. This level indicates that the patient may not be receiving adequate oxygenation, which can occur due to respiratory compromise commonly associated with allergic reactions, particularly anaphylaxis. Providing supplemental oxygen helps to increase the oxygen saturation levels in the blood, improving tissue oxygenation and potentially stabilizing the patient's condition until further intervention can be provided or transport occurs.

In cases of an allergic reaction, particularly if there's concern for airway edema or anaphylaxis, oxygen support is crucial to prevent further complications and support the patient's respiratory function. While immediate transport or epinephrine administration may also be necessary based on the severity of the reaction, the first step in addressing low oxygen saturation is to ensure that the patient is getting sufficient oxygen.

The other options, while important in their own contexts, do not specifically address the immediate need created by a low pulse oximetry reading. Administering epinephrine and performing CPR may be critical in unrelated life-threatening scenarios, but in this case, the priority is to provide supplemental oxygen to ensure the patient maintains adequate oxygen levels.