Botulinum Toxin type A injection Versus Lidocaine Injection for Myofascial Pain Involving upper Trapezius

승모근 근막동통에 대한 보툴리눔 독소와 리도카인 주사의 치료효과 비교

  • Ahn, Sung-Woo (Department of Oral Medicine, College of Dentistry, Dankook University) ;
  • Park, Eun-Hee (Department of Oral Medicine, College of Dentistry, Dankook University) ;
  • Kim, Mee-Eun (Department of Oral Medicine, College of Dentistry, Dankook University)
  • 안성우 (단국대학교 치과대학 구강내과학교실) ;
  • 박은희 (단국대학교 치과대학 구강내과학교실) ;
  • 김미은 (단국대학교 치과대학 구강내과학교실)
  • Published : 2005.09.30

Abstract

The purpose of this double-blind study was to evaluate clinical effects of botulinum toxin type A (BTX-A) injection on myofascial pain syndrome (MPS) involving upper trapezius and compare with those of lidocaine injection. 21 patients presenting with active TrP1 and/or TrP2 in the upper trapezius over 6 months were selected for this study. The subjects were randomly divided into two groups; one group injected with BTX-A (15 unit of $Botox^{(R)}$ / 0.3 ml per trigger point (TrP)) and the other group injected with 0.5% lidocaine (0.3 ml /TrP). The clinical effects were evaluated by VAS and PPT at baseline, 2, 4, 6 and 8 weeks after treatment. BTX-A group showed persistent decrease of VAS values and increase of PPT values following treatment. While there was no significant difference in VAS values between BTX-A and lidocaine groups (p=0.347), there was significant difference in PPT values after treatment between two groups (p=0.000). The subjects received BTX-A showed noticeable improvement in PPT values after treatment, suggesting more reliable effect of BTX-A injection compared with lidocaine injection. The results of this study support that the direct injection of BTX-A to a TrP is an effective and safe treatment for MPS involving upper trapezius.

근막동통(myofascial pain syndrome, MPS)은 근막발통점에 의해 야기되는 지각, 운동 및 자율신경계의 증상으로 발통점이 자극되면 이환부에 동통을 발생할 뿐 아니라 연관통, 연관압통, 운동신경장애, 자율신경반응을 야기할 수 있다. 본 연구는 근막동통의 다양한 치료법 중에서 botulinum toxin type A(BTX-A)의 주사의 효과를 국소마취제인 lidocaine의 주사효과와 비교하였다. 상부 승모근에 6개월 이상 활동성 발통점을 가진 21명의 환자를 선정한 다음, 무작위로 두 군으로 나누어 한 군(BTX-A 주사군, n=12)에는 발통점에 BTX-A(15 unit of $Botox^{(R)}$ / 0.3 ml per trigger point (TrP))를 주사하고 다른 군(lidocaine 주사군, n=9)에는 0.5% lidocaine (0.3 ml /TrP)를 주사하였다. 두 군 모두 주사는 1 회만 시행하였으며 운동요법이나 물리치료 및 약물치료는 시행하지 않았다. 주사 후 동통의 변화를 관찰하기 위하여 주사 전 및 주사 후 2 주, 4 주, 6 주, 8 주에 주관적 동통척도인 VAS와 압력통각역치(PPT)를 측정하였으며 실험은 이중맹검으로 시행되었다. 실험결과, BTX-A 주사군은 주사 후 8 주의 시간이 경과되는 동안 VAS가 지속적으로 감소하였으며 PPT는 지속적으로 증가하였으나 lidocaine 주사군에서는 VAS의 감소만이 관찰되었다. 즉, 주관적인 동통척도에 있어서는 BTX-A 주사군과 lidocaine 주사군 사이에 유의한 통계학적 차이가 나타나지 않고(p=0.347), 두 군 모두 시간경과에 따라 동통이 감소하는 양상을 보여주었다. 그러나 PPT의 경우에는 BTX-A 주사군에서만 감소하여 두 군 사이에 유의한 통계학적 차이가 관찰되었다(p=0.000). 본 연구의 결과에 따르면 상부승모근 발통점에 대한 BTX-A 주사는 효과적이고 신뢰할 만한 치료법이라고 생각된다.

Keywords

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