変形性股関節症における神経障害性疼痛と股関節機能

Neuropathic Pain and the Hip Function of Patients with Hip Osteoarthritis

　背景：本研究の目的は，変形性股関節症(変股症)患者の疼痛における神経障害性疼痛の頻度と機能障害の程度を調査することである．

　対象と方法：変股症患者89例94股を対象とし，神経障害性疼痛のスクリーニングツール(簡易調査票)と日本整形外科学会股関節機能判定基準(JOA hipスコア)を用いて評価した．

　結果：変股症患者の30%に神経障害性疼痛を認めた．簡易調査票とJOA hipスコアには有意な相関を認めた．

　まとめ：変股症の疼痛には，侵害受容性疼痛だけでなく神経障害性疼痛も含まれていた．また，神経障害性疼痛の股関節機能障害への関与が示唆された．

　Background：The aim of the present study was to investigate the relationships between neuropathic pain and the hip function of patients with hip osteoarthritis.

　Methods：The subjects of this study were 89 patients with osteoarthritis of the hip (94 hips).　The subjects were evaluated based on their neuropathic pain score (NP score) and the Japanese Orthopaedic Association hip rating score (JOA hip score).

　Results：According to the NP scores the subjects experienced moderate or severe neuropathic pain in 30% of the hips.　There was a significant correlation between the NP scores and the JOA hip scores.

　Conclusions：The results of this study suggest that hip-osteoarthritis-related pain can be attributed to both nociceptive pain and neuropathic pain.　The neuropathic pain may also affect hip function.