Patent ID: 8715307

Claim:
A device for performing an incision in a region of interest of a patient, the device comprising: a housing having an elongate slot at one end thereof; a blade arranged to be biased in a retracted position within the housing in a pre-operating position and a post-operating position; a guide having a cam having an arcuate profile having a curved valley portion of a substantially central portion of the profile for guiding the blade through a pre-determined cutting path, and for guiding the blade from the pre-operating position through an operating position to the post-operating position; and a plate including: a blade holder for holding the blade, the blade holder having a guide protrusion arranged to engage with the guide in the operating position; a bias configured to enact an inward force on the blade holder so as to bias the blade towards the retracted position to retain the blade within the housing in the pre-operating position and the post-operating position; and a trigger for triggering the blade to extend through the elongate slot in the operating position to make the incision, wherein the blade is guided through the pre-determined cutting path of the blade by contact of the guide protrusion with the arcuate profile of the guide to make the incision having a parabolic shape; wherein the blade holder is connected to the trigger through the bias and the blade, the bias and the trigger are configured to rotate about a point on the housing when the trigger is depressed, wherein the blade is rotated through the pre-determined cutting path.