Optical Tracker And Surgical Device With An Optical Tracker

A surgical device comprising:

• a shaft defining a longitudinal axis, the shaft having a first shaft portion configured to be inserted into a patient and a second shaft portion configured to be located outside the patient when the first shaft portion is inserted in the patient;
• an actuation member actuatable relative to the first shaft portion;
• an operation member operable relative to the second shaft portion, the operation member being configured to actuate the actuation member when being operated;
• and
• an optical tracker coupled with the operation member so that operation of the operation member causes the optical tracker to rotate relative to the shaft,
• wherein the optical tracker comprises a plurality of markers arranged in a pattern that defines, from a given viewing direction, distinctive arrangements of the markers in different rotational states of the optical tracker relative to a longitudinal axis of the optical tracker.

A system comprising:

• a shaft defining a longitudinal axis, the shaft having a first shaft portion configured to be inserted into a patient and a second shaft portion configured to be located outside the patient when the first shaft portion is inserted in the patient;
• an actuation member actuatable relative to the first shaft portion;
• an operation member operable relative to the second shaft portion, the operation member being configured to actuate the actuation member when being operated;
• an optical tracker coupled with the operation member so that operation of the operation member causes the optical tracker to rotate relative to the shaft;
• and
• an implant configured to be actuated by the actuation member from a first actuation state to a second actuation state,
• wherein the optical tracker comprises a plurality of markers arranged in a pattern that defines, from a given viewing direction, distinctive arrangements of the markers in different rotational states of the optical tracker relative to a longitudinal axis of the optical tracker.