Clinical efficiency of robot system assisted unicompartmental knee arthroplasty for treatment of knee osteoarthritis in elderly patients

(1. Department of Anesthesiology, ;2. Department of Nursing, Third Medical Center, Chinese PLA General Hospital, Beijing 100039, China;3. Department of Orthopedics, First Medical Center, Chinese PLA General Hospital, Beijing 100853, China)

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    Objective To compare the clinical effectiveness of robot system assisted unicompartmental knee arthroplasty and traditional surgery in the treatment of knee osteoarthritis in the elderly patients. Methods A total of 78 elderly patients with knee osteoarthritis admitted to Chinese PLA General Hospital from January 2018 to June 2020 were prospectively recruited in this study. They were randomly divided into observation group (n=39) and the control group (n=39), with the former group undergoing robot system-assisted UKA and the latter traditional surgery. Their perioperative data, visual analogue scale (VAS) scores at 8,16, 24 h after surgery, and knee society score (KSS) at 6 months postoperatively were collected and compared between the 2 groups. Results The observation group had significantly longer operation time [(155±22) vs (135±22) min] and shorter use time of intraoperative tourniquet [(27±10) vs (40±9) min], and obviously less total blood loss on the second day after operation [(476±290) vs (536±215) ml] when compared with the control group (all P<0.05). The VAS scores at 8 and 16 h after surgery were (3.2±1.2) and (1.8±0.8) points in the observation group and (4.6±1.4) and (2.3±1.1) points in the control group, and significant differences were seen between the 2 groups (all P<0.05). But no such difference was observed in the score at 24 h [(1.1±0.3) vs (1.2±0.5) points, P>0.05]. At 6 months postoperatively, statistical differences were seen in the KSS score [(78±11) vs (90±6)points] and functional score [(70±16) vs (79±12)points] between 2 groups (both P<0.05). Conclusion Robot system-assisted UKA can provide excellent precision and safety through a minimally invasive approach, and promote postoperative knee function recovery in patients.

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  • Received:November 02,2020
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  • Online: July 28,2021
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