国产“鸿鹄”膝关节置换手术机器人的早期临床研究

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Abstract Objective To evaluate the surgical accuracy of the robot assisted orthopedic surgery system，“Skywalker” system，and verify the early clinical osteotomy effect，so as to provide experimental basis for system improvement and clinical use.Methods The clinical data of 5 patients who received total knee arthroplasty assisted by “Skywalker” arthroplasty robot in the joint surgery department of the ninth people's hospital affiliated to medical college of Shanghai Jiaotong university from June to September 2020 were retrospectively analyzed.There were 2 males and 3 females with the age of(68.4±4.7)years (range：64~76 years) with a BMI of (27.1±3.3)kg/m².The “Skywalker” surgical robot system was used for preoperative planning of knee arthroplasty.During the surgery，the robot arm reached the designated position，and the osteotomy was performed by the surgeon.The difference between the preoperative planned osteotomy and the actual osteotomy was evaluated，and the lower limb alignment angle before and after the surgery was measured.Results The actual error is the difference between the actual osteotomy amount and the expected osteotomy amount，and the absolute value of the actual error can be taken as the judgment standard of the error.There were 6 absolute errors in 6 sites including the medial and lateral condyles of the distal femur，the medial and lateral posterior condyles of the femur and the medial and lateral sides of the tibial plateau.73.3% of the absolute errors were between 0~1 mm(22/30)，16.7% were between 1~2 mm(5/30)，and 6.7% were between 2~3 mm(2/30).The absolute error of the lateral tibial plateau in one patient was 3.1mm.The lower limb alignment angle in 5 patients tended to 180°more than before，and the mean angle errors between preoperative planned angles and postoperative angles of lower limb alignment angle，coronal femoral component angle，and coronal tibial component angle were less than 1°.The operation process of 5 patients was smooth，and no postoperative complications such as surgical site infection，deep vein thrombosis and vascular nerve injury were observed.Conclusion “Skywalker” system has good osteotomy accuracy and stability and is expected to assist joint surgeons to achieve better results of intraoperative osteotomy and postoperative reconstruction of lower limb alignment in clinical use in the future.

Key words： surgical robot total knee arthroplasty knee osteoarthritis

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