Final answer:
For a patient with a percutaneous tracheostomy (PCT), the appropriate oxygen delivery device is a tracheostomy collar, which is designed to fit around the tracheostomy and provide oxygen directly.
Step-by-step explanation:
The correct oxygen delivery device for a client with a percutaneous tracheostomy (PCT) would be a tracheostomy collar. This device is specifically designed to deliver humidified oxygen directly to the tracheostomy tube, making it the most suitable choice compared to other options like the simple mask, face tent, or nasal cannula, which are not compatible with a tracheostomy. The tracheostomy collar fits around the neck, and over the tracheostomy site, and provides a stable method to deliver oxygen when a patient has a tracheostomy.