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    The effect of the severity of COVID-19 on the sequelae of the audiovestibular system
    (Sage Publications Inc, 2023) Aydin, Sukru; Koca, Cigdem Firat; Celik, Turgut; Kelles, Mehmet; Yasar, Seyma; Oguzturk, Saadet
    Objectives: The neurotropic and neuroinvasive properties of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) have been described. It remains unknown how SARS-CoV-2 affects the audiovestibular system when it causes mild or severe disease. In this study, the sequelae effect of SARS-CoV-2 on the audiovestibular systems of different patient groups was investigated using objective and subjective test batteries. Methods: In this present study, we evaluated vestibulocochlear functions of patients who previously had Coronavirus Disease-2019 (COVID-19) with pure tone audiometry, ocular vestibular-evoked myogenic potential (o-VEMP), and cervical vestibular-evoked myogenic potential (c-VEMP) tests to identify possible sequelae by comparing them with the control group. Results: We found that the amplitude of p13-n23 was lower in both groups of patients than in the control group (p < 0.001). In the results of the left ear c-VEMP, the amplitude of p13-n23 was statistically different between the outpatient, inpatient, and control groups. The amplitude of p13-n23 was lower in both groups of patients than in the control group (p < 0.001). In the evaluation of the o-VEMP in the left ear, we observed a statistically significant difference in the latency of n10 (p = 0.006) and the amplitude of n10-p15 (p < 0.001) between the groups. The n10 latency was prolonged in both groups of patients compared to the control group and there was no statistically significant difference between groups of patients. Furthermore, the amplitude of n10-p15 was lower in both groups of patients compared to the control group and there were no statistically demonstrable differences between the groups of patients. Conclusions: In conclusion, our results suggest that SARS-CoV-2 may affect the vestibulocochlear system. But we could not find a direct relationship according to the severity of the disease.
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    Vitamin D: A Factor affecting the Success of Type 1 Tympanoplasty
    (Sage Publications Inc, 2025) Kelles, Mehmet; Guler, Yavuz; Guler, Rukiye
    Objectives: Vitamin D (VD) plays role in wound healing and protection against infections. The relationship between plasma VD level and the outcomes of Type 1 tympanoplasty (T1T) has not been studied before. Methods: A total of 101 patients with chronic otitis media scheduled for T1T were divided into four groups in relation with their VD levels as severe insufficiency, insufficiency, mild-to-modest deficiency and optimal VD level groups. Graft success, hearing improvement and postoperative infection rates were compared among the groups in 12-month follow-up period. Results: The graft success rate (P = 0.014) and air-bone gap gain (P = 0.004) were significantly higher, and postoperative infection rate was significantly lower (P < 0.001) in optimal VD level group. Conclusion: 25-OH VD deficiency should be considered as a factor for failure in T1T. VD replacement may increase success of tympanoplasty in patients with low preoperative serum VD levels.