Improvement of muscle strength in osteoarthritic knee patients after intraarticular knee injection of hyaluronan |
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Authors: | Tang Simon F T Chen Carl P C Chen Max J L Hong Wei-Hsien Yu Tung-Yang Tsai Wen-Chung |
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Institution: | Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital, Taiwan. |
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Abstract: | OBJECTIVE: The objective of this study was to investigate whether the knee concentric and eccentric muscle strengths can be improved in patients with bilateral knee osteoarthritis after intraarticular hyaluronan injections. DESIGN: A total of 25 patients with bilateral knee osteoarthritis and with a radiographic Ahlb?ck grading scale of I or II participated in this study. One session of intraarticular knee injection of hyaluronan was given to both knees (weekly intraarticular knee hyaluronan injections for a total of 5 wks). Knee concentric and eccentric muscle strengths were recorded between 10 and 90 degrees of knee flexion. The recordings were done on two angular velocities, 80 and 240 degrees/sec. This study took place in a tertiary medical center with a gait laboratory and a KIN-COM isokinetic dynamometer. RESULTS: An increase in concentric and eccentric muscle strength adjusted for body weight (P < 0.01) was observed in both knees, ranging between 5.1% and 27.7%. CONCLUSION: The decreased knee muscle contraction strength (concentric and eccentric) can be improved in knee osteoarthritis patients with an Ahlb?ck grading scale of I or II after five weekly intraarticular knee injections of hyaluronan. |
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