PMC9107369_01
(a) PTA on the 1st postoperative day after tympanoplasty type I on the right and ETD on both sides. Regular BC threshold on the right. (b) PTA on day 5 postoperative tympanoplasty type I right and ETD bilateral. BC drop of 10-20 dB pantonal right. (c) No response when examining the cVEMP. (d) vHIT of the lateral semicircular canal. Right gain of 0.18, left 1.03.
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fig1
The postoperative PTA showed a regular bone conduction on the right side (Figure 1(a)). A bone conduction (BC) drop of 10-20 dB on the right side was found in the PTA (Figure 1(b)). In the examination of the cervical vestibular evoked myogenic potentials (cVEMP), no response was detected (Figure 1(c)). The video head impulse test (vHIT) of the lateral semicircular canal was abnormal (Figure 1(d)).
(a) PTA on the 1st postoperative day after tympanoscopy with round window coverage on the right. Increase of the BC threshold of 5-15 dB pantonal. (b) PTA 3 weeks after tympanoscopy with round window coverage on the right. Complete regression of the BC threshold on the right. (c) Presence of a response when examining the cVEMP. (d) vHIT of the right lateral semicircular canal. Increase of gain up to 0.58.
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PMC9107369_01_CRIOT2022-5978757.002.jpg
fig2
On the 1st postoperative day, the PTA showed an increase of the bone conduction (BC) threshold of 5-15 dB pantonal (Figure 2(a)) and a subjective significant improvement of the dizziness symptoms. Even three weeks after the tympanoscopy with round window coverage on the right side, the BC threshold had completely regressed in the PTA (Figure 2(b)), a response in cVEMP was detected (Figure 2(c)) and a clear increase of the gain up to 0.58 of the lateral semicircular canal (SCC) on the right side was shown in the vHIT (Figure 2(d)).