Ethmoidotomy system and implantable spacer devices having therapeutic substance delivery capability for treatment of paranasal sinusitis
Substance delivering spacer devices may comprise expandable reservoirs that are implantable in paranasal sinuses and other cavities, openings and passageways of the body to maintain patency and to provide sustained local delivery of a therapeutic or diagnostic substance. Also provided are sinus penetrator devices and systems for performing ethmoidotomy procedures or for creating other openings in the walls of paranasal sinuses or other anatomical structures.
1. A method for treating sinusitis, the method comprising:
obtaining or providing a substance eluting reservoir, said reservoir being inflatable from a non-expanded configuration to an expanded configuration and, when in said expanded configuration, having a side wall, proximal and distal tapers and a plurality of openings, the reservoir being mounted on a shaft that has a lumen through which the steroid may be introduced into the reservoir;
inserting the reservoir into a paranasal sinus or ostium of a paranasal sinus while the reservoir is in the non-expanded configuration; and
introducing a steroid through the shaft lumen and into the reservoir while the reservoir is positioned within the paranasal sinus or ostium of a paranasal sinus thereby inflating the reservoir to the expanded configuration and causing steroid to pass through the openings of the reservoir at a rate that is effective to treat the sinusitis;
wherein the method further comprises shortening the shaft so that the shaft does not protrude out of the patient's nose.
2. A method according to claim 1 , wherein introducing the steroid comprises introducing a Triamcinolone Acetonide suspension.
3. A method according to claim 2 wherein the reservoir delivers a dose of approximately 100 μg Triamcinolone Acetonide per day.
4. A method according to claim 1 , wherein the steroid is in the form of a suspension and wherein the method further comprises adding additional liquid to the reservoir.
5. A method according to claim 1 , wherein the method further comprises adding additional steroid to the reservoir.
6. A method according to claim 1 , wherein introducing the steroid comprises introducing the steroid in solution form.
7. A method according to claim 6 , wherein the steroid solution comprises at least one steroid dissolved in at least one cyclodextrin.
8. A method according to claim 1 , wherein the openings are formed in the side wall of the reservoir.
9. A method according to claim 1 wherein a surgical opening is created to access an ethmoid sinus and wherein the reservoir is inserted, while in the non-expanded configuration, through that surgical opening and into the ethmoid sinus.
10. A method according to claim 1 wherein the reservoir is inserted, while in the non-expanded configuration, through or into an ostium of a frontal, maxillary or sphenoid sinus.
11. A method according to claim 1 wherein the shortening of the shaft so that the shaft does not protrude out of the patient's nose occurs after the steroid has been introduced into the reservoir.
12. A method according to claim 1 wherein the reservoir remains in place for a period of days following introduction of the steroid into the reservoir.
13. A method according to claim 1 wherein the reservoir is constructed and the amount of steroid introduced is such that steroid will continue to pass through the openings of the reservoir at a rate that is effective to treat the sinusitis for 28 days.