Patent ID: 11883160
Assignee: CHINA NATIONAL INSTITUTE OF STANDARDIZATION
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A

Claim 3:
4. The positioning method of the FRCS based on the rigid upper arm model according to claim 3, wherein, step 3 comprises:
step 31: determining three marking points M1, M2 and M3 on the skin surface of the human upper arm, and vertical vectors {right arrow over (R1)}, {right arrow over (R2)}, and {right arrow over (R3)} respectively from the marking points M1, M2 and M3 to the reference axis vector being translated to make a start point of each of the vertical vectors be located at a midpoint MD of the medial and lateral epicondylar points of the humerus;
step 32: determining a center of a circle where an end point of each of the vertical vectors is located after a translation (represented by mark O), a displacement from the midpoint MD of the medial and lateral epicondyle points of the humerus to the center O being {right arrow over (Dpm)} denoting a displacement from the reference axis vector to the central axis vector.