HKUMed introduces the latest robotic arm for joint replacement surgery

2020-06-28

The Department of Orthopaedics and Traumatology, LKS Faculty of Medicine of the University of Hong Kong (HKUMed) introduces the latest robotic arm for joint replacement surgery. The Queen Mary Hospital is the first public hospital utlizing the technology in Hong Kong. As of May this year, 161 robotic arm surgery. have been completed, including 79 total knee replacements, 35 single knee replacements, and 47 total hip replacements. Surgical planning is done on three-dimensional CT scans which enable accurate patient-specific planning. Bone removal is under haptic control by the robotic arm thus improving precision and reducing outliers. Implant placement in total hip replacement is also controlled by the robotic arm.

For instance, in a hip replacement surgery, the accuracy of placing a prosthesis with a robotic arm is 98% higher than that of traditional surgery by about 80%. According to the experience of the HKUMed, the length of hospitalization of patients with traditional surgery is about 5 to 6 days, and the revision rate within 5 years is 7%. The use of robotic arms to improve accuracy can reduce tissue damage near the patients' joints and shorten the hospitalization time to 4 to 5 days, the renovation rate will be reduced to 3%. The robotic arm was introduced from the US, costs about HK$15 million for each. Queen Mary Hospital performs about 500 joint replacement surgery each year and about 40% of these surgeries will use robotic arms in the coming future. Priority will be given to young patients who undergo joint replacement surgery for the first time.

(Source: The University of Hong Kong, Ming Pao )

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