Surface electromyography of lower limb muscles in knee osteoarthritis patients undergoing knee joint replacement

doi:10.3969/j.issn.2095-4344.2014.13.010

Abstract

Abstract:

BACKGROUND: It has still been controversial about the functional recovery of lower limb muscles in patients with knee osteoarthritis after knee joint replacement.
OBJECTIVE: To evaluate the function of lower limb muscles in patients with knee osteoarthritis after knee joint replacement.
METHODS: Lower limb muscles (rectus femoris muscle, tibialis anterior muscle, biceps femoris muscle, medial head of gastrocnemius muscle) of 25 patients with bilateral knee osteoarthritis after unilateral knee joint replacement were tested in flat land walking using surface electromyography (TELEMYO 2400R G2, USA). Before the surface electromyography, bilateral knee joint functions of the patients were evaluated using the Hospital for Special Surgery knee score.
RESULTS AND CONCLUSION: After knee replacement, the Hospital for Special Surgery knee score showed that the average score in replacement surgery side was 91.44 points and the excellent and good rate was 100%. The average score in non-replacement side was 54.52 points. Pain and joint function of replacement surgery side was improved significantly after surgery. There was no significant difference between knee joint replacement side and non-replacement side in the amplitude, the integral electromyography, the mean frequency, the median frequency (average, minimum, maximum) of rectus femoris muscle, tibialis anterior muscle and biceps femoris muscle (P > 0.05). The amplitude and the integral electromyography in the medial head of gastrocnemius muscle were significantly higher in the replacement side than those in the non-replacement side (P < 0.05). There was no significant difference in mean frequency and the median frequency in the medial head of gastrocnemius muscle between knee joint replacement side and non-replacement side (P > 0.05). These results indicated that the lower limb muscle function did not return to normal activity levels in patients after knee joint replacement, so the muscle exercise is especially valuable in the postoperative rehabilitation of these patients.

中国组织工程研究杂志出版内容重点：人工关节；骨植入物；脊柱；骨折；内固定；数字化骨科；组织工程

全文链接：

Key words: osteoarthritis, knee, knee joint, electromyography

CLC Number:

R318

Huang Ping, Liu Zhi-hong, Qi Jin, Chen Bo, Xu Jian-qiang, Deng Lian-fu. Surface electromyography of lower limb muscles in knee osteoarthritis patients undergoing knee joint replacement[J]. Chinese Journal of Tissue Engineering Research, 2014, 18(13): 2024-2029.

Figures/Tables 2

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