Apparatus and method for treatment of ethmoid sinusitis

A method of forming an opening in a sinus wall, the method comprising:

• (a) piercing a sinus wall by driving a rotating member through the sinus wall, wherein the rotating member includes a helical flight;
• and
• (b) driving a cutting member distally over the rotating member and through the sinus wall, wherein the rotating member is held stationary relative to the sinus wall during the act of driving the cutting member distally, wherein the act of driving the cutting member through the sinus wall forms an opening in the sinus wall.

A method of using a cleaning instrument to clean a cutting instrument, wherein the cleaning instrument comprises wall structure defining a notch, wherein the cutting instrument comprises a shaft having a helical flight, the method comprising:

• (a) positioning the shaft of the cutting instrument in the notch;
• and
• (b) rotating the cutting instrument relative to the cleaning instrument such that the shaft and the helical flight traverse the wall structure defining the notch, whereby the regions of the wall structure adjacent to the notch remove debris from the shaft and the helical flight as the shaft and the helical flight traverse the wall structure.