TRIGGER ASSEMBLY FOR TYMPANOSTOMY TUBE DELIVERY DEVICE

摘要

A tympanostomy tube delivery device comprises a shaft assembly, a pressure equalization tube, and a trigger assembly. The shaft assembly comprises a cannula and a pusher operable to translate relative to the cannula. The pressure equalization tube is positioned within the shaft assembly. The pusher is operable to drive the pressure equalization tube out of the shaft assembly. The trigger assembly includes a pair of pushbuttons and a linkage. The pushbuttons are secured to the device via living hinges and are selectively pivotable. The linkage is configured to engage the delivery device to thereby selectively prevent actuation of the delivery device. The pivoting of one or both the pushbuttons is configured cause the linkage to collapse so as to disengage the delivery device and thereby actuate the delivery device.

主权项

1. An instrument, comprising:
(a) a shaft assembly, wherein the shaft assembly comprises a plurality of coaxially arranged shafts and a tympanostomy tube; (b) a handpiece body, wherein the shaft assembly extends distally from the handpiece body; (c) a drive assembly operable to drive the shafts of the shaft assembly in a predetermined sequence to deploy the tympanostomy tube; and (d) a trigger assembly operable to selectively activate the drive assembly, wherein the trigger assembly comprises:
(i) a trigger member, and(ii) a linkage, wherein the linkage includes a pair of pivoting links, wherein a first link of the pair of links is engaged with the drive assembly to thereby restrain movement of the drive assembly,wherein the trigger member is operable to pivot the links to thereby disengage the first link from the drive assembly.