Methods for treating sinus diseases

A method for treating a sinus disease, the method comprising the steps of:

• (a) inserting a portion of a device into a nasal cavity of a patient through a nostril, the device comprising:
• a handle comprising a proximal end and a distal end;
• an inflation device at least partially disposed within the handle;
• a flexible tubular member extending from the handle, the flexible tubular member comprising an inflation lumen fluidly coupled to the inflation device, and a second lumen fluidly coupled to a medication port;
• and
• an expandable member attached to the flexible tubular member, the expandable member comprising a proximal end and a distal end, wherein the inflation lumen opens, via an inflation port, into the expandable member, wherein the medication port is disposed proximally of the proximal end of the expandable member;
• (b) expanding, using the inflation lumen, the expandable member adjacent to the patient's choana;
• (c) introducing an amount of medication into the nasal cavity, such that at least a portion of the medication enters an ostium of a paranasal sinus of the patient and enters the paranasal sinus and at least a portion of the medication remains in the paranasal sinus for a period of 5 minutes to 40 minutes.