Patent ID: 8894614

Claim:
A system comprising: (a) a dilation catheter, comprising: (i) a catheter shaft having a proximal portion and a distal portion that is more flexible than the proximal portion, (ii) a dilator disposed along the distal portion of the catheter shaft and having a length of at least about 12 mm to about 24 mm so as to have sufficient length to extend through the frontal sinus ostium and substantially all of the frontal recess, and (iii) a guidewire lumen extending from an open proximal end of the catheter shaft to an open distal end of the catheter shaft, wherein the guidewire lumen is configured to accommodate a guidewire and enable the dilation catheter to slide along the guidewire; and (b) a guide having a proximal portion and a distal portion, wherein the distal portion of the guide is sized to fit and stop within or adjacent to the frontal recess; wherein the dilator is configured to be advanced relative to the guide to position the dilator within the frontal sinus ostium and frontal recess such that a single expansion of the dilator will result in dilation of the frontal sinus ostium and substantially all of the adjacent frontal recess.