| CPC A61B 17/00 (2013.01) [A61B 34/20 (2016.02); A61B 2017/00725 (2013.01); A61B 2034/2055 (2016.02); A61B 2034/207 (2016.02); A61B 2090/3983 (2016.02)] | 8 Claims |

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1. A calibration device, comprising:
a calibration member including:
a calibration body having a first side and a second side opposite to the first side; and
a calibration groove formed on the first side;
a handle having a grip portion, wherein the handle is adjacent to the first side and detachably disposed above the calibration groove, and a calibration opening is formed between the handle and the first side;
a fixing button movably arranged in the handle, wherein the fixing button has a fixing portion extending toward the calibration groove; and
a plurality of first markers disposed on the second side;
wherein, when the fixing button is pressed, a surgical instrument inserted into the calibration opening is held between the fixing portion and the calibration groove.
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