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Phenol block for cervical dystonia: effects and side effects
Naoyuki Takeuchi1, Takayo Chuma, Yukio Mano
1Department of Rehabilitation Medicine, Hokkaido University Graduate School of Medicine, North 14 West 5, Sapporo 060-0814, Japan. naoyuki@med.hokudai.ac.jp
Archives of Physical Medicine and Rehabilitation
|July 9, 2004
Summary
Phenol block injections effectively improved cervical dystonia (CD) symptoms in patients refractory to other treatments. While temporary sensory disturbances occurred, the treatment
Area of Science:
- Neurology
- Medical Interventions
Background:
- Cervical dystonia (CD) is a neurological disorder causing involuntary neck muscle contractions.
- Many CD cases are refractory to conventional oral medications and rehabilitation therapies.
Purpose of the Study:
- To evaluate the efficacy and safety of 2% phenol nerve blocks for treating refractory cervical dystonia.
- To assess the impact of phenol blocks on patient-reported outcomes and side effects.
Main Methods:
- A case series design was employed, involving 16 patients with idiopathic and refractory CD.
- Electromyography-guided 2% phenol nerve blocks were administered.
- Neurological assessments using the Tsui score were conducted pre- and post-treatment, with side effect monitoring.
Main Results:
- Significant improvement in neck movement and position was observed post-phenol block (P=.0002).
- Four patients experienced temporary sensory disturbances in the neck, which resolved within 3 months.
- The therapeutic effects of the phenol block persisted beyond the duration of sensory side effects.
Conclusions:
- 2% phenol nerve blocks offer a viable treatment option for cervical dystonia refractory to standard therapies.
- The procedure demonstrates a favorable benefit-risk profile, with manageable side effects.
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