Hanyang Med Rev.  2016 May;36(2):131-135. 10.7599/hmr.2016.36.2.131.

Microvascular Decompression for Tinnitus

• Ko Y

• KMID: 2164672
• DOI: http://doi.org/10.7599/hmr.2016.36.2.131

Abstract

Tinnitus had been considered a surgically incurable disease, given the failure of several treatment methods. Jannetta reported that tinnitus is one of the hyperactive diseases of the cranial nerve along with hemifacial spasm and trigeminal neuralgia (TGN). Microvascular decompression (MVD) of the eighth cranial nerve was introduced to treat medically intractable tinnitus. Intraoperative monitoring of brainstem auditory evoked potential (BAEP) was able to reduce postoperative complication rates. Less than 1 ms of latency delay and a 40% decrease in amplitude of wave V of the brainstem evoked potential is a landmark of monitoring during surgery. Less than 6 years of duration of tinnitus, normal BAEP before surgery, no accompanying dizziness before surgery and a loop-type offending artery are effective factors for good surgical results of MVD.

Keyword

Tinnitus; Surgery; Microvascular Decompression; Brainstem Auditory Evoked Potential

MeSH Terms

Arteries
Brain Stem
Cranial Nerves
Dizziness
Evoked Potentials
Evoked Potentials, Auditory, Brain Stem
Hemifacial Spasm
Microvascular Decompression Surgery*
Monitoring, Intraoperative
Postoperative Complications
Tinnitus*
Trigeminal Neuralgia
Vestibulocochlear Nerve

Figure

• 

  Fig. 1 Intraoperative finding: An artery (asterisk) was displaced from the eighth cranial nerve, which is discolored at the portion (arrow) being compressed by an artery.

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