A drill bit for drilling into bone, including at least a first, second and third longitudinally extending substantially straight flute blades, wherein the drill bit has an extrapolated outer profile established by rotation of the first, second and third flute blades 360 degrees about a longitudinal axis thereof, the extrapolated outer profile includes a first surface having tangents more perpendicular than parallel to the longitudinal axis, and the extrapolated outer profile includes a second surface having tangents more parallel than perpendicular to the longitudinal axis.

A drill bit for drilling into bone, including at least a first, second and third longitudinally extending substantially straight flute blades, wherein the drill bit has an extrapolated outer profile established by rotation of the first, second and third flute blades 360 degrees about a longitudinal axis thereof, the extrapolated outer profile includes a first surface having tangents more perpendicular than parallel to the longitudinal axis, and the extrapolated outer profile includes a second surface having tangents more parallel than perpendicular to the longitudinal axis.

Described herein is a method for treating a narrowed region of a lumen in the ear or nose of a patient. The method includes advancing a catheter within the lumen such that a distal end of the catheter is positioned proximate to the narrowed region, filling a fillable member to expand the fillable member within the lumen, and generating at least one shock wave from at least one shock wave emitter. The at least one shock wave creates one or more fractures in a bony structure of the narrowed region of the lumen that dilate the narrowed region.

Described herein is a device for treating a narrowed region of a lumen in the ear or nose of a patient, the device comprising: an elongated tube; at least one shock wave emitter, the at least one shock wave emitter configured to generate at least one shock wave along a working direction; at least one imaging sensor oriented to capture images along the working direction; and a fillable member sealed to a distal end of the elongated tube and surrounding the at least one shock wave emitter and the at least one imaging sensor, the fillable member fillable with a conductive fluid.

A lighted surgical instrument has an instrument body defining a proximal portion, a distal portion, and a mid-portion extending between the proximal portion and the distal portion. The proximal portion includes a base adapted to receive a light source and a linear section defining a first axis, while the distal portion has a linear section defining a second axis and terminating in a functional tip, with the second axis of the distal portion is parallel to but offset from the first axis of the proximal portion. The linear section of the proximal portion may have a cross-sectional shape of a Reuleaux triangle. The instrument body is capable of functioning as a light pipe, such that light introduced into the base of the proximal portion will be transmitted to the functional tip of the instrument by internal reflection.

The present disclosure relates to a device that can guide perpendicular drilling and simultaneously measure flatness of an insertion surface through a locking protrusion by rotating the device in bone conduction implantation. According to the present disclosure, it is possible to measure flatness and guide perpendicular boring with a constant force even without using a separate flatness measurer in surgery. Further, it is also possible to guide drilling using a spacer having a smaller diameter by using an assistant guide member.