Isokinetic Strength Test of Muscle Strength and Motor Function in Total Knee Arthroplasty

Abstract

ObjectiveTo use isokinetic strength testing system to test and analyze the relationship between changes in muscle strength before and after knee replacement in patients undergoing total knee arthroplasty (TKA).MethodsA total of 200 patients with advanced knee osteoarthritis treated from June 2018 to June 2019 were selected for TKA. The patient's isokinetic muscle strength test was performed in the first, third, and the sixth month before and after the operation. The knee hamstring peak torque (PT value), quadriceps peak torque (PT value), and total work were mainly measured. The knee joint was evaluated at the hospital for special surgery score, range of motion and other knee function standards, and then healthy limbs and normal people were tested with the same method. Statistical data was used to analyze and deal with the data, evaluate the muscle strength and motor function changes with time progressing, then compare the differences to the healthy limb. From P < 0.05, we can see that the differences have some statistical significance. The influences that TKA has on motor function changes of lower limbs were also observed.ResultsAmong the 200 subjects, 162 completed all follow‐up tests, and the remaining 38 were lost to follow‐up for various reasons. The rate of loss of follow‐up was approximately 19%. The isokinetic muscle strength test system and the knee joint function scoring standard were used to record the knee joint muscle strength and function changes before and after knee joint replacement. Statistical analysis was performed to show the knee joint hamstring muscle force and quadriceps muscle strength and joint mobility in the first month after the surgery. The knee joint muscle strength and joint mobility were significantly improved after the third month after the surgery, but there were still some differences compared with normal people. The knee function index was significantly improved in the sixth month after operation (P < 0.05), and there were no significant differences compared with normal people.ConclusionsKnee joint strength and knee function after TKA are significantly improved compared with preoperative function, which is of great significance for the treatment of knee osteoarthritis. The constant velocity muscle strength test system has the advantages of safety, accuracy, repeatability and easy operation. It is a good method to evaluate the knee joint's muscle strength and function after the knee joint replacement.

The Effect of Tourniquet Application on the Morphology and Function of Quadriceps in Patients Undergoing Total Knee Arthroplasty: A Study Protocol for a Single Blind Randomized Controlled Trial

“…Additionally, we include three tests of rehabilitation department. Isokinetic muscle strength proved to be valid in assessment of muscle function in TKA [42,43] . Three-dimensional gait analysis is a useful clinical test to evaluate gait abnormality which can be captured by cameras placed around a walkway [44] .…”

The effect of tourniquet application on the morphology and function of quadriceps in patients undergoing total knee arthroplasty: study protocol for a single-blind randomized controlled trial

“…Additionally, we include three tests of rehabilitation department. The isokinetic muscle strength test has been proved to be valid in the assessment of muscle strength in TKA patients [37,38]. Three-dimensional gait analysis is a useful clinical test to evaluate gait abnormality which can be captured by cameras placed around a walkway [39].…”

Is Continuous Locking Suture with Braided Suture Sufficient for Arthrotomy Repair in the Conventional TKR? A Randomized Controlled Trial Study

“…First, the QS measurement protocol used in this study was slightly different from the previous studies. Due to the evaluation of the QS recovery after arthrotomy repair and the prevention of suture breakage, our study was designed to use HHD and assess QS in 30 o knee exion with the earliest follow-up visit as 2 weeks, whereas the previous studies on QS recovery after TKR were performed using various measurement tools (such as isokinetic dynamometer, electromechanical dynamometer, or chair-xed dynamometer) and testing in knee positions varying from 30 o to 75 o knee exion with the earliest follow-up visit at 1 month [9,15,21,26]. Moreover, the reliability of the QS assessment in some patients might be affected by the knee pain as the mean VAS at 2 weeks postoperatively was 2.9 ± 18 in the CLS group and 2.2 ± 1.4 in the IHM group (Fig.…”