Kwon Junbeom, Kim Hyoung Seop, Chang Won Hyuk, Park Chunung, Lee Sang Chul
Department of Rehabilitation Medicine and Research Institute of Rehabilitation Medicine, Yonsei University College of Medicine & Severance Hospital, Seoul, Korea.
Department of Physical Medicine and Rehabilitation, National Health Insurance Service Ilsan Hospital, Goyang, Korea.
Ann Rehabil Med. 2017 Aug;41(4):573-581. doi: 10.5535/arm.2017.41.4.573. Epub 2017 Aug 31.
To report the characteristics of myofascial trigger points (MTrPs) in the infraspinatus muscle and evaluate the therapeutic effect of trigger-point injections.
Medical records of 297 patients (221 women; age, 53.9±11.3 years) with MTrPs in the infraspinatus muscle were reviewed retrospectively. Because there were 83 patients with MTrPs in both infraspinatus muscles, the characteristics of total 380 infraspinatus muscles with MTrPs (214 one side, 83 both sides) were investigated. Specific characteristics collected included chief complaint area, referred pain pattern, the number of local twitch responses, and distribution of MTrPs in the muscle. For statistical analysis, the paired t-test was used to compare a visual analogue scale (VAS) before and 2 weeks after the first injection.
The most common chief complaint area of MTrPs in the infraspinatus muscle was the scapular area. The most common pattern of referred pain was the anterolateral aspect of the arm (above the elbow). Active MTrPs were multiple rather than single in the infraspinatus muscle. MTrPs were frequently in the center of the muscle. Trigger-point injection of the infraspinatus muscle significantly decreased the pain intensity. Mean VAS score decreased significantly after the first injection compared to the baseline (7.11 vs. 3.74; p<0.001).
Characteristics of MTrPs and the therapeutic effects of trigger-point injections of the infraspinatus muscle were assessed. These findings could provide clinicians with useful information in diagnosing and treating myofascial pain syndrome of the infraspinatus muscle.
报告冈下肌肌筋膜触发点（MTrP）的特征，并评估触发点注射的治疗效果。
回顾性分析297例（221例女性；年龄53.9±11.3岁）冈下肌存在MTrP患者的病历。由于有83例患者双侧冈下肌均存在MTrP，因此对总共380块存在MTrP的冈下肌（214块单侧，83块双侧）的特征进行了研究。收集的具体特征包括主要疼痛部位、牵涉痛模式、局部抽搐反应数量以及MTrP在肌肉中的分布。为进行统计分析，采用配对t检验比较首次注射前和注射后2周的视觉模拟评分（VAS）。
冈下肌MTrP最常见的主要疼痛部位是肩胛区。最常见的牵涉痛模式是手臂前外侧（肘部以上）。冈下肌中活跃的MTrP是多个而非单个。MTrP常位于肌肉中心。冈下肌触发点注射显著降低了疼痛强度。与基线相比，首次注射后VAS平均评分显著降低（7.11对3.74；p<0.001）。
评估了冈下肌MTrP的特征及触发点注射的治疗效果。这些发现可为临床医生诊断和治疗冈下肌肌筋膜疼痛综合征提供有用信息。
