An embodiment includes an apparatus for carpel tunnel syndrome surgery. The apparatus comprises: a shaft including a shaft proximal end, a shaft distal end, and a shaft long axis, wherein the shaft distal end comprises a raised edge； a linkage included within the shaft； a blade coupled to a distal end of the linkage； wherein (a)(i) an axis parallel to the shaft long axis intersects the raised edge but does not intersect the shaft, (a)(ii) the raised edge is curvilinear, (a)(iii) the raised edge includes a first lateral edge portion, a second lateral edge portion, and a middle edge portion between the first and second lateral edge portions； and (a)(iv) the first and second lateral edge portions are both proximal to the middle edge portion. Other embodiments are described herein.
