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KMID : 0361020000430070710
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Korean Journal of Otolaryngology - Head and Neck Surgery
2000 Volume.43 No. 7 p.710 ~ p.714
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Recovery Time of Auricular Sensation after the Retroauricular Incision
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Park Jin-Bok
Baek Sung-Hun
Joo Hyun-Joo
Kim Jong-Ok
Shim Woo-Young
Lee Won-Yong
Kim Chong-Ae
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Abstract
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Background and Objectives : When the great auricular nerve and lesser occipital nerve are transected via
retroacuricular incision in ear surgeries, postsurgical hypoesthesia and numbness of the ear can occur.
However, little attention has been paid to these symptoms and the morbidity associated with their
sacrifice, Therefore, in this study, we examined the recovery time of auricle sensation.
Material and Methods : Thirty patients who had received mastoidectomy with retroauricular incision
in Wallace Memorial Baptist Hospital from November 1998 to 1999 were included in this study. For these patients,
two point discrimination tests were performed by placing the sharp legs of a compass at the lower 1/3
portion of the auricular helix before and after the surgery at 1-week intervals until the postoperative
value became equal to the preoperative value. We also measured the minimal painful Ampere with the
electrical stimulator in the same area, and in triangular fossa and cavum concha before and after the
surgery while carrying out the two point discrimination study.
Results : With the two point discrimination test, the postoperative value became equal to the preoperative
value 17.23±1.88 weeks after the surgery. With the electrical stimulation which uses a Hilger stimulator, the time when postoperative value became equal to the preoperative value was found to be 17.7±2.03 weeks at the lower 1/3 portion of the helix, 20.13±2.16 weeks at triangular fossa and 20.66±1.64 weeks at cavum concha. The result of the two point
discrimination test was not statistically different from that of the electrical stimulation test using Hilger
facial nerve stimulator at the lower 1/3 portion of the helix(p<0.05).
Conclusions : We thought that Hilger stimulator may be useful in assessing the sensory recovery time, and we could measure the sensory recovery time at three positions of the auricle innervated by different nerves.
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KEYWORD
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Auricular sensory nerve, Two point discrimination, Recovery time, Hilger stimulator
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