Electrogustometric assessment of taste after otologic surgery in children.
OBJECTIVE
Long term taste dysfunction after otologic surgery has never been characterized in children. The aim of this study is to determine the rates of gustatory dysfunction in normal and postotologic surgery in children.


METHODS
Cross-sectional study.


METHODS
One hundred sixty children visiting a tertiary pediatric otolaryngology clinic, 4 to 18 years of age, were recruited. Surgical groups included patients who had undergone tympanoplasty, combined approach mastoidectomy, modified radical mastoidectomy, and unilateral and bilateral cochlear implantation. They were then tested using a Rion TR-06 electrogustometer (Sensonics, Inc., Haddon Heights, NJ) using a standardized protocol to assess chorda tympani nerve function. An abnormal gustometry result was defined as any recording of > or =16 dB or a difference of 6 dB between ears.


RESULTS
The control group had a 9% (5/61) abnormal electrogustometric threshold rate. Rates of dysfunction after surgery were: tympanoplasty (27%, 4/15), combined approach mastoidectomy (30%, 11/29), modified radical mastoidectomy (50%, 4/8). Unilateral cochlear implantation yielded a 26% (7/27) per ear risk of dysfunction, whereas bilateral cochlear implantation had a 5% (2/40) per ear risk.


CONCLUSIONS
There is a 9% baseline level of electrogustometric abnormality in the pediatric population, which suggests a subclinical level of gustatory dysfunction. Normal electrogustometry was found in 50% of children after modified radical mastoidectomy, suggesting a degree of neural regenerative capacity. Finally, cochlear implantation, using newer surgical techniques (in the bilateral cochlear implant group) has a low risk for causing gustatory dysfunction, reducing concerns over the safety profile of bilateral cochlear implantation.
Leung
Randy M
RM
Department of Otolaryngology-Head and Neck Surgery, Hospital for Sick Children, University of Toronto, 555 University Avenue, Toronto, Ontario, Canada. randy.leung@utoronto.ca
Ramsden
James
J
Gordon
Karen
K
Allemang
Brooke
B
Harrison
Brittany J
BJ
Papsin
Blake C
BC
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D019929:Cochlear Implantation; D003430:Cross-Sectional Studies; D004568:Electrodiagnosis; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008416:Mastoid / Q000601:surgery; D013506:Otologic Surgical Procedures; D011183:Postoperative Complications / Q000175:diagnosis / Q000453:epidemiology; D013651:Taste Disorders / Q000175:diagnosis* / Q000453:epidemiology*; D014433:Tympanoplasty