HANDHELD SURGICAL TOOL WITH AUTONOMOUS NAVIGATION

摘要

The handheld surgical tool comprises a handle (1), an instrument shaft (2) and a navigation device (3). The navigation device (3) comprises at least one sensor unit (31) for sensing positional data, a computing unit (33) configured to determine a position in space based on signals of the sensor unit (31), at least one set key (35) and a position memory (36) configured to store a data set for a position upon activation of the at least one set key (35). A comparator (4) is operatively connected to the position memory (36) and configured for comparing an actual position against a position stored in the position memory (36) in at least two different operation modes and for generation of a deviation signal, wherein a first operation mode differs from the second operation mode in that it is configured for a reduced comparison only which lacks at least one spatial dimension opposed to the second operation mode. A feedback device (5) is provided supplied with the deviation signal and being configured to indicate direction and preferably magnitude of any deviation.