DEVICES FOR INJECTION AND DOSING

摘要

Injection devices are provided which include a handpiece capable of housing a cartridge containing an injectable composition, and a head coupled to the handpiece and housing a plurality of retractable needles and a dosing mechanism. Methods of treating skin surfaces are also provided.

主权项

1. A dermal filler injection device comprising:
a housing including an interior space for containing a cartridge; a trigger coupled to the housing; a head in communication with the interior space and including plurality of dosing chambers, and a plurality of retractable needles coupled thereto; wherein the device is structured such that operation of the trigger initially causes the needle to be moved from a retracted position to an extended position and subsequently causes a dose of fluid contained in the dosing chamber to be ejected from the needle when the needle is in the extended position; the device further structured to cause retraction of the needles after the dosing; and a mechanism capable of filling each dosing chamber between subsequent injections.