Final answer:
The procedure described in the question is a surgical treatment for removing diseased tissue from the left ethmoid sinus.
Step-by-step explanation:
The procedure described in the question is a surgical treatment for removing diseased tissue from the left ethmoid sinus.
The surgeon used an intranasal approach, where topical agents were applied to shrink the blood vessels and local anesthesia was injected.
The middle turbinate was retracted to expose the sinus opening, and a small curette was used to locate and remove the diseased ethmoid cells.