Apparatus and method for treatment of ethmoid sinusitis
First Claim
1. An apparatus, wherein the apparatus comprises:
- (a) a first cutting member, wherein the first cutting member comprises a helical blade and an engagement portion, wherein at least a portion of the helical blade is configured to be advanced through a sinus wall of a patient, wherein the engagement portion projects distally from at least a portion of the helical blade and is configured to engage the sinus wall and thereby resist further advancement of the helical blade; and
(b) a second cutting member coaxially positioned about the first cutting member, wherein the second cutting member comprises a sharp distal edge, wherein the second cutting member is operable to translate distally relative to the first cutting member to selectively cover at least a portion of the helical blade.
1 Assignment
0 Petitions
Accused Products
Abstract
An apparatus may be used to form an opening in a sinus wall. The apparatus comprises a first cutting member and a second cutting member. The first cutting member comprises a helical blade. The second cutting member is slidably disposed about the first cutting member. The second cutting member comprises a sharp distal edge. An outer sheath is slidably disposed about the first and second cutting member. The sheath may be retracted to uncover the helical blade. The second cutting member may be advanced over the first cutting member to form a circular opening in the sinus wall. The sheath may include an obliquely angled distal edge. A cleaning instrument may be used to clean debris from the first cutting member.
843 Citations
20 Claims
-
1. An apparatus, wherein the apparatus comprises:
-
(a) a first cutting member, wherein the first cutting member comprises a helical blade and an engagement portion, wherein at least a portion of the helical blade is configured to be advanced through a sinus wall of a patient, wherein the engagement portion projects distally from at least a portion of the helical blade and is configured to engage the sinus wall and thereby resist further advancement of the helical blade; and (b) a second cutting member coaxially positioned about the first cutting member, wherein the second cutting member comprises a sharp distal edge, wherein the second cutting member is operable to translate distally relative to the first cutting member to selectively cover at least a portion of the helical blade. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. 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 an engagement portion; (b) advancing the helical flight through the sinus wall; (c) engaging the engagement portion with the sinus wall thereby resisting further advancement of the helical blade through the sinus wall; and (d) 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. - View Dependent Claims (18, 19)
-
-
20. An apparatus comprising:
-
(a) a first cutting member, wherein the first cutting member comprises a shaft and a helical blade positioned about the shaft; (b) a second cutting member coaxially positioned about the first cutting member, wherein the second cutting member comprises a sharp distal edge, wherein the second cutting member is operable to translate relative to the first cutting member to selectively cover at least a portion of the helical blade; and (c) a cleaning member including a notch with at least one cleaning edge extending therealong, wherein the notch is sized to receive the shaft, and wherein the notch is smaller than the helical blade such that the at least one cleaning edge is configured to scrape along the helical blade for removing a tissue debris from the helical blade, wherein the notch is open in a longitudinal direction and a transverse direction such that the notch is configured to receive the helical blade from the transverse and the longitudinal directions.
-
Specification