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Mandibular Nerve Block Treatment for Trismus Associated With Hypoxic-Ischemic Encephalopathy
  1. Hiroshi Takemura, M.D.,
  2. Yutaka Masuda, M.D.,
  3. Ryo Yatsushiro, M.D.,
  4. Norimasa Yamamoto, M.D. and
  5. Akiyoshi Hosoyamada, M.D.
  1. From the Department of Anesthesiology, Showa University School of Medicine, Tokyo, Japan.
  1. Reprint requests: Hiroshi Takemura, M.D., Department of Anesthesiology, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8666, Japan. E-mail:


Background and Objectives We describe the use of mandibular nerve block for the management of bilateral trismus associated with hypoxic-ischemic encephalopathy.

Case Report The patient was a 65-year-old man with bilateral trismus due to hypoxic-ischemic encephalopathy. Despite his impaired consciousness, we performed fluoroscopically guided bilateral mandibular nerve block. The bilateral symptoms were sufficiently improved, without obvious side effects, by injecting a local anesthetic near the right mandibular nerve and a neurolytic near the left mandibular nerve.

Conclusions Mandibular nerve block may be an effective treatment for patients with bilateral trismus due to ischemic-encephalopathy, even when consciousness is impaired.

  • Mandibular nerve block
  • Trismus
  • Encephalopathy

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  • This study was performed at the Department of anesthesiology, Showa University School of Medicine.

    Presented at the Japan Society of Pain Clinicians Annual Meeting, Takasaki, Japan, July 1999.