Surgical electrical tool, activation unit and calibration method therefor

摘要

A sterilizable surgical power tool and an operating unit for the surgical power tool are described. The operating unit includes a hermetically sealed metal capsule for arrangement in the region of a housing of the surgical power tool, the capsule having a contact surface for a finger on an outer face. A force sensor which is in force-transmitting connection to the contact surface is arranged inside the capsule. At least one electrical contact leads out of the capsule. The capsule may be a low-cost standard transistor housing.

主权项

1. A method of calibrating a force sensor for a surgical tool, comprising the steps:
providing the surgical tool with the force sensor for use in a surgical procedure; detecting activation of the surgical tool during the surgical procedure; detecting an expiry of a predetermined time interval when the surgical tool is inactive during the surgical procedure; measuring an output signal of the force sensor as a response to the detection of the expiry of the predetermined time interval when the surgical tool is inactive; and utilizing the measured output signal of the force sensor as a zero signal for a next activation of the surgical tool.