Comparison of Regeneration of the Chorda Tympani Nerve and Gustatory Function Recovery After Severing the Nerve Between Pediatric and Adult Patients

Saito, Takehisa; Yamada, Tetsuji; Okamoto, Masayuki; Narita, Norihiko

doi:10.1097/mao.0b013e3182713997

Cited by 18 publications

(16 citation statements)

References 25 publications

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“…There was also no difference in the rate of patients with an elevated EGM threshold between pediatric and adult groups regardless of preservation or sectioning of the CTN. These results indicate that taste function of pediatric patients was damaged as much that of adult patients by CTN manipulation during middle ear surgery, contrary to the reports of Leung et al, Saito et al, and Sone et al Six months after surgery, the rates of pediatric patients with taste symptoms and increased EGM thresholds were lower than those of adult patients in both the CTN‐preserved and CTN‐sectioned groups. This suggests that taste function of pediatric patients caused by CTN manipulation was more likely to improve than that of adult patients, as in previous reports .…”

Section: Discussioncontrasting

confidence: 85%

“…In their study, the results of pediatric patients were not compared with those of adult patients. Saito et al reported that 45% of adult patients complained of a taste disorder, whereas there were no complaints of a taste disorder in any pediatric patients after the CTN was sectioned during middle ear surgery. In addition, they reported that when sectioned nerve ends were put together (end‐to‐end anastomosis), the incidence of CTN regeneration detected during the second surgery was 58.1% in pediatric patients and 31.1% in adult patients, and there was a significant difference between the two groups.…”

Section: Discussionmentioning

confidence: 99%

“…In the three previous studies concerning the surgical changes of CTN function, only taste function was measured as the CTN function. The present study is the first to investigate the change and the prognosis of somatosensory function in pediatric patients in comparison with that in adult patients.…”

Section: Discussionmentioning

confidence: 99%

“…The score of scale out was defined as 36 dB. The criteria for a significantly increased EGM threshold were >16 dB or a difference of >6 dB between the two sides.…”

Section: Methodsmentioning

confidence: 99%

“…They reported that somatosensory function deteriorated on the affected side after middle ear surgery . It is generally thought that pediatric patients complain of postoperative taste function less frequently than adult patients . Postoperative taste function was also considered to be less common in pediatric patients than in adult patients.…”

Section: Introductionmentioning

confidence: 99%

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Earlier recovery of lingual dysfunction after middle ear surgery in pediatric versus adult patients

et al. 2019

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Objectives It is generally thought that the recovery of damaged chorda tympani nerve (CTN) function after middle ear surgery is different in pediatric patients from that in adult patients. The purpose of this study was to investigate the changes and the progress of taste and somatosensory functions of the tongue after middle ear surgery in pediatric patients compared with those of adult patients. Study Design Prospective study. Methods Fifty‐nine pediatric patients and 106 adult patients underwent middle ear surgery. Taste and somatosensory functions of the anterior tongue, the so‐called CTN functions, were assessed using electrogustometry (EGM), a 2‐point discriminator, an electrostimulator, and a questionnaire before and 2 weeks and 6 months after surgery. Results Two weeks after surgery, there was no significant difference in the incidence of dysgeusia and abnormal EGM thresholds between the patient groups. The incidence of tongue numbness was significantly lower in pediatric patients than in adult patients regardless of CTN manipulation. Although the lingual somatosensory thresholds of adult patients were significantly increased, those of pediatric patients were not increased. Six months after surgery, the incidences of dysgeusia and an abnormal EGM threshold were lower in pediatric patients than in adult patients. Tongue numbness disappeared, and the thresholds of lingual somatosensory tests returned to normal in most pediatric patients. Conclusion Not only taste function but also lingual somatosensory function was damaged after middle ear surgery even in pediatric patients. Pediatric patients complained of tongue numbness less frequently and showed earlier recovery than adult patients. Level of Evidence 2 Laryngoscope, 130:1016–1022, 2020

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Section: Discussioncontrasting

confidence: 85%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…The score of scale out was defined as 36 dB. The criteria for a significantly increased EGM threshold were >16 dB or a difference of >6 dB between the two sides.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Earlier recovery of lingual dysfunction after middle ear surgery in pediatric versus adult patients

et al. 2019

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Assessment of Taste Function

Zhu

Hummel

2021

Handbook of Experimental Pharmacology

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Comparison of sequential same-day middle ear surgeries: bilateral mastoidectomy, unilateral mastoidectomy with contralateral tympanoplasty, and bilateral tympanoplasty

Kim

Lee

Park

et al. 2014

Eur Arch Otorhinolaryngol

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We evaluated the advantages and outcomes of performing bilateral simultaneous middle ear surgery for chronic otitis media. For comprehensive analysis, we compared three subgroups, bilateral mastoidectomy (MM), unilateral mastoidectomy with contralateral tympanoplasty (MT), and bilateral tympanoplasty (TT). A total of 176 ears of 85 patients with chronic otitis media or cholesteatoma underwent bilateral same-day surgery. The side with worse hearing was chosen for the first operation. In the absence of any intra-operative complications, the contralateral operation was then performed. Results of hearing tests did not differ significantly among the three groups except for gained decibels in the TT versus MT groups (P = 0.033). The correlation between pre-operative sound-field audiometry (SFA) and postoperative SFA was statistically significant. These results indicate that low frequency hearing was recovered immediately, but middle and high frequencies recovered later. Temporary taste change differed statistically among the three groups (P = 0.006). There were significantly more revision cases during the postoperative period in the groups that included mastoidectomy (MM group, MT group) (P = 0.035). Bilateral simultaneous middle ear surgery provides good hearing outcomes, reduces costs and operation times, and has a low incidence of complications. The results of our study may be helpful in guiding the otologist's decision when performing bilateral middle ear surgery.

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Comparison of Regeneration of the Chorda Tympani Nerve and Gustatory Function Recovery After Severing the Nerve Between Pediatric and Adult Patients

Abstract: Chronic inflammation may not severely affect the CTN in pediatric patients, resulting in higher incidences of CTN regeneration and gustatory function recovery after severing the nerve, compared with those in adult patients.

Cited by 18 publications

References 25 publications

Earlier recovery of lingual dysfunction after middle ear surgery in pediatric versus adult patients

Earlier recovery of lingual dysfunction after middle ear surgery in pediatric versus adult patients

Assessment of Taste Function

Comparison of sequential same-day middle ear surgeries: bilateral mastoidectomy, unilateral mastoidectomy with contralateral tympanoplasty, and bilateral tympanoplasty

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