Final answer:
The oxygen delivery method indicated for a patient with a trach is the tracheostomy collar.
Step-by-step explanation:
The oxygen delivery method indicated for a patient with a trach is the tracheostomy collar. This device is specifically designed for patients with a tracheostomy tube. It consists of a small, lightweight collar that fits around the patient's neck and delivers oxygen directly to the tracheostomy tube. It is commonly used in hospitals and home care settings for patients who require long-term ventilation support.