The ethmoid sinuses are located between the eyes and the bridge of the nose. They are key to treating most sinus infections because all the other sinuses drain through or next to them. So, if the ethmoid sinuses are blocked, the infection can spread to the other sinuses.
An ethmoidectomy removes infected tissue and bone in the ethmoid sinuses that blocks natural drainage. The surgeon views the ethmoid sinuses with an endoscope, a thin flexible tube with a very small camera and light at the end of it. Another special instrument called a microdebrider is used, this has a tiny curved rotating tip that helps the surgeon remove the tissue.
The doctor should be asked for a detailed explanation of the benefits and risks of the procedure, as well as their experience performing this kind of surgery.