The modified curette will consist of two segments joined by a Nano17 6-axis force sensor. (Image 1) The force sensor is integrated into the shaft of the instrument (a standard neurosurgical ring curette) and insulated from the shaft with two polyetherimide (also known as ULTEM) disks so that no current can be transmitted from the force sensor to the curette. The sensor is held to the shaft by medical grade adhesive and set screws.