Final answer:
The RT should continue the current oxygen therapy using portable equipment during the infant's transport to radiology, ensuring the same level of respiratory support with the proper oxygen concentration and humidity.
Step-by-step explanation:
An infant with a tracheostomy receiving a specific oxygen therapy requires transport to a different facility department. The most appropriate action for the respiratory therapist (RT) to take in this scenario is to continue the same therapy if the equipment is portable and can ensure the same oxygen concentration and humidification during the transport.
Transporting an infant within a medical facility requires maintaining the same level of respiratory support that they receive in their normal care setting. If the current therapy is not portable, an alternative method like a portable ventilator or a battery-powered aerosol system needs to be employed that can deliver the prescribed 30% oxygen. A simple mask might not be appropriate due to lack of humidity and inadequate oxygen concentration. Disconnecting the nebulizer is not safe, as it would interrupt the ongoing therapy. Increasing the oxygen concentration without medical indication could be harmful.