Effect Of Postoperative Drainage On Functional Rehabilitation After Medial Monocondylar Replacement Of Knee Osteoarthritis

Objective:Retrospective analysis of the effect of postoperative drainage on functional rehabilitation after unicompartmental knee arthroplasty(UKA).Methods:A total of 52 patients with medial compartment osteoarthritis of the knees underwent unicompartmental knee arthroplasty with Oxford III UKA system between July 2013 and December 2018 were included in this study,and the patients were divided into drainage group and non-drainage group.We recorded and analyzed gender,age,body mass index(BMI),HSS score and range of motion(ROM).In the drainage group,there were 9 males and 18 females,with an average age of(68.5±6.3)years;in the non-drainage group,there were 8 males and 17 females,with an average age of(69±7.4)years.The early functional rehabilitation after knee surgery were evaluated based on assessment of first straight-leg raising,90-120°ROM and independent ambulation time,postoperative HSS score and VAS score.The effect of drainage on postoperative functional recovery in the early stage were assessed.Results:Postoperative rehabilitation guidance and follow-up were conducted for 1 year.Compared with group without drainage after UKA,The drainage group performed better in early procedure with statistical significance.No statistic difference were observed between the two groups in over three months VAS score and HSS score.Conclusion:The intra-articular pressure could be decrease by Drainage and may be beneficial to early joint activity of knee,nevertheless,it has little effect on functional recovery three months after surgery.