Abstract: An ultrasonic surgical instrument includes a proximal portion forming a socket attached to an ultrasonic vibration generating device and a distal portion. The instrument extends from the proximal portion to the distal portion along a main longitudinal axis and also includes a fluid channel. The distal portion includes a cutting portion, a fluid port and one or two radial bumps extending radially outwardly. The radial projections have a longitudinal position corresponding substantially to the longitudinal position of the cutting portion, whereby the radial bump provides a mark and/or a tactile location point beneath the skin for the surgeon for use in rhinoplasty or jaw surgery.