Patent ID: 8721591

Claim:
A method for improving drainage from an ethmoid sinus having an ostium and one or more adjacent ethmoid air cells in a human or animal subject, said method comprising the steps of: A) inserting a guide through the ostium and into the ethmoid sinus; B) advancing an enlarging device over the guide to a position within the ostium and using that enlarging device to enlarge the ostium; C) advancing a penetrating device into the ethmoid sinus via the enlarged ostium and using that penetrating device to form an opening between the ethmoid sinus and an ethmoid air cell; D) advancing a guide from the ethmoid sinus, through the formed opening and into the ethmoid air cell; and E) advancing an enlarging device over the guide of step D to a position within the formed opening and using the enlarging device to enlarge the formed opening.