Patent ID: 7727186

Claim:
A method for treating sinusitis and/or a disorder of a nasal cavity in a patient, the method comprising: advancing a catheter through a nostril of the patient to position an anterior occluder of the catheter at a first position in the nostril and a posterior occluder of the catheter at a second position posterior to the first position, wherein the catheter extends between the anterior and posterior occluders; expanding the posterior and anterior occluders to form fluid tight seals with tissue of the patient at the first and second positions; passing a substance through the catheter into an area of the patient between the fluid tight seals; collapsing the occluders; performing a treatment on at least one of a paranasal sinus, a paranasal sinus ostium or a nasal cavity using a treatment device; removing the catheter from the patient; advancing a guide device into the nostril; advancing a balloon dilation catheter over or through the guide to position a balloon of the balloon dilation catheter in a paranasal sinus ostium; expanding the balloon to expand the ostium; deflating the balloon; and removing the balloon dilation catheter from the patient.