Evaluation of Subjective and Objective Voice Characteristics in Patients With Bulimia Nervosa.

OBJECTIVE: The present study aims to examine subjectively and objectively the voice changes in bulimia nervosa (BN) patients at different stages of treatment. METHOD: The study was conducted with a study group including 10 patients followed up with a diagnosis of BN and a control group consisting of 10 healthy participants of a similar age group without eating disorders. The Reflux Symptom Index (RFS) was used for stroboscopic evaluation. The fundamental frequency (F0), jitter, shimmer, and noise-to-harmonics ratio were determined during acoustic voice analysis. Maximum phonation time was analyzed. A subjective evaluation was performed using the Voice Handicap Index-10 (VHI-10). RESULTS: Jitter, shimmer, VHI-10 score, and RFS values showed a statistically significant difference in the patient and control groups (P < 0.05). The mean values of jitter, shimmer, VHI-10 score, and RFS were higher in the patient group than in the control group. Maximum phonation time did not differ between groups (P > 0.05) Age and F0 (Hz) values showed no statistically significant difference in the patient and control groups (P > 0.05). CONCLUSIONS: In BN patients, the laryngopharyngeal reflux mechanism causes negative effects on vocal cord examination and acoustic sound analysis parameters, leading to subjective dissatisfaction.

Efficacy of Kinesio taping on Mutational Falsetto: A Double Blind, Randomized, Sham-controlled Trial.

OBJECTIVES: This study aimed to assess the efficacy of Kinesio taping on male patients with mutational falsetto undergoing voice therapy. DESIGN: Double blind, randomized, sham-controlled clinical trial. PARTICIPANTS: Interviews were conducted with thirty seven mutational falsetto patients. Included 32 participants were randomized and divided into two groups. Two were dropped out due to irregular attendance, 30 participants were included in final analysis. INTERVENTIONS: The study group was treated with voice therapy and applications of three different therapeutic Kinesio taping techniques with seven Kinesio tapes four times over two weeks, and the control group was treated with voice therapy, and applied to sham Kinesio taping. OUTCOME MEASURES: The values of fundamental frequency, jitter, shimmer, noise-harmonic ratio, maximum phonation time, Voice Handicap Index-10 scores, and Grade-Roughness-Breathiness-Asthenia-Strain Scale scores were recorded at the baseline and after the two weeks. RESULTS: There were significant differences between the study group and the control group with respect to the values of fundamental frequency (P = 0.011), jitter (P = 0.041), shimmer (P = 0.036), noise-harmonic ratio (P = 0.003), maximum phonation time (P ≤ 0.001), Voice Handicap Index-10 scores (P = 0.036), and Grade-Roughness-Breathiness-Asthenia-Strain Scale scores (P = 0.007; P ≤ 0.021; P = 0.022; P = 0.002; P = 0.021, respectively) at the end of the study. CONCLUSIONS: The study demonstrated that Kinesio taping with voice therapy is an efficient and effective technique for treating mutational falsetto patients.

Assessment of the Clinical Use of Vestibular Evoked Myogenic Potentials and the Video Head Impulse Test in the Diagnosis of Early-Stage Parkinson's Disease.

OBJECTIVES: To explore the usefulness of vestibular tests including "vestibular evoked myogenic potentials" (VEMPs) and the video head impulse test (vHIT) in the early diagnosis of "idiopathic Parkinson's disease" (PD). MATERIALS AND METHODS: The study involved 80 participants including 40 patients (24 males, 16 females; age average 63.20 ± 7.94 years) with PD and 40 healthy individuals (18 males and 22 females; age average of 60.36 ± 7.68 years). The Modified Hoehn and Yahr (H&Y) scale was used to measure how Parkinson's symptoms progress and the level of disability. Patients with PD underwent cVEMPs, oVEMPs, and vHIT and the results were compared with those of 40 age-matched healthy control (HC) subjects. vHIT results and VEMP responses were registered in all patients and HCs. RESULTS: One-sided absent cVEMP responses were found in 6 (15%) patients with PD and 8 (20%) patients had bilaterally absent responses. Five (12.5%) patients had 1-sided absent oVEMP responses and it was bilateral in 6 (15%). Patients with PD had significantly shorter cVEMP P1, N1 latency, lower cVEMP amplitudes, and oVEMP amplitudes than the HC group. The cVEMP and oVEMP amplitude asymmetry ratio was significantly higher in the PD group (P < .05). Evaluation of vHIT results and vestibular-ocular reflex (VOR) gain between the groups revealed that anterior canal and posterior canal VOR gains results were remarkably lower in the PD group than in the HCs (P < .05). There was no difference in right and left lateral canal VOR gains between the groups (P > .05). CONCLUSION: The results of this study suggest that cVEMP and vHIT can be used to evaluate the vestibular system in patients with early-stage Parkinson's disease.

Evaluation of the Swallowing and Voice Functions in Ankylosing Spondylitis Patients.

This study aimed to evaluate the swallowing and voice functions in patients with ankylosing spondylitis. Thirty patients with ankylosing spondylitis (Group 1) and 30 healthy individuals (Group 2) were included in the study. Following the laryngoscopic evaluation of the patients, the fiberoptic endoscopic evaluation of swallowing was performed, and then, the penetration-aspiration score was determined. The participants were asked to fill the eating assessment tool form. Voice recordings obtained to evaluate sound disorders were measured acoustically and analyzed using the PRAAT program. In terms of swallowing, the penetration-aspiration score obtained as a result of the flexible endoscopic swallowing assessment and eating assessment tool score was found to be higher in Group 1 than in Group 2, and a statistically significant difference was noted (p ≤ 0.001). When analyzing the maximum phonation time (p < 0.001) and fundamental frequency (p = 0.408) values in phonation evaluation, a statistically significant difference was found between the two groups. Group 1 showed a deterioration in terms of jitter (p = 0.040) and shimmer (p = 0.007) compared to Group 2, and a statistically significant difference was noted. There was no statistically significant difference in the harmonic/noise ratio (mean ± standard deviation) between the two groups (p = 0.051). Swallowing and voice functions significantly affect quality of life. Therefore, approaches aimed to improve the associated symptoms have become increasingly important. In patients with ankylosing spondylitis, swallowing quality and phonation ability may be negatively affected. These patients should be monitored for hidden or overt food aspiration.Trial Registry: https://clinicaltrials.gov/ct2/show/NCT04437394.

A Review of the Quality of Life after Therapeutic Maneuvers in Patients with Benign Paroxysmal Positional Vertigo.

INTRODUCTION: Benign paroxysmal positional vertigo (BPPV) is a common cause of peripheral vestibular disturbances. Particle repositioning or liberatory maneuvers provide relief of symptoms in the majority of patients. However, studies mainly focus on success. This study aims to review the conditions that may have an impact on residual dizziness or recurrence following therapeutic maneuvers in patients with BPPV. MATERIALS AND METHODS: A review of the literature about the analysis of quality of life after therapeutic maneuvers was conducted. Three hundred and seven articles after search in the PubMed database were classified into eight main groups after exclusion of those that are not suitable to predetermined criteria. RESULTS: Thirty-eight articles for residual dizziness in BPPV, eighty-three articles for the duration of BPPV, forty articles for the type of canal involvement, forty-three articles for the impact of age, one hundred and nine articles for the gender difference, forty-seven articles for co-morbid conditions, one hundred and twenty-four articles for medication and sixty-eight articles for vestibular exercises in BPPV were selected. CONCLUSION: VEMP abnormality is a reliable indicator to demonstrate the risk of recurrence. Duration of dizziness has no significant impact on recurrence. But the length of duration is important for residual dizziness. Vestibular rehabilitation or medication alone has no place in treatment but may help to reduce the symptoms in addition to maneuver. Self-perceived evaluation of balance after therapeutic maneuvers is recommended for the selection of those who need rehabilitation or additional medication.

Efficacy of Low Mandible Maneuver on Mutational Falsetto.

OBJECTIVES: Mutational falsetto (MF) is a functional voice disorder involving failure to transition from the high-pitched voice of childhood to the lower-pitched voice of adolescence and adulthood. The low mandible maneuver (LMM) is used by professional singers to relax the larynx and expand the resonance space. It relaxes suprahyoid muscles and pushes the larynx backwards, so it can be used as a therapy for MF. MATERIAL AND METHODS: The data of 20 MF patients treated by the LMM were analyzed in this study. All of the patients were asked to complete the Voice Handicap Index-10 (VHI-10) before the first session, and again 2 weeks after the second visit. The Grade-Roughness-Breathiness-Asthenia-Strain (GRBAS) scale scores and fundamental frequency (F0) were analyzed for each patient. RESULTS: All except 1 patient reported that they completed the exercises without difficulty; the patient who did not perform the exercises cited reasons other than their difficulty. Only 2 patients failed to transition from MF to a lower-pitched voice. The GRBAS scale scores (all parameters) differed significantly between the first and second sessions. The VHI-10 score also changed, i.e., self-perceived voice quality was improved significantly, as was the F0. CONCLUSIONS: Our results showed that the LMM is an efficient and rapid technique for treating MF patients and shows high patient compliance.

Analysis of snoring to determine the site of obstruction in obstructive sleep apnea syndrome.

BACKGROUND: The aim of this study was to integrate the physical findings of drug-induced sleep endoscopy with snoring sound analysis in patients with obstructive sleep apnea/hypopnea syndrome (OSAS) and to compare the findings with previously published data. METHODS: This was a prospective, non-randomized study. Participants were all candidates for surgical treatment of OSAS and formed three groups, retropalatal (RP) obstructions, retrolingual (RL) obstructions, and multilevel (ML) obstructions. At the time of DISE, recordings of concurrent snoring sounds were made. Mean pitch frequency, peak sound frequency, and fundamental frequency (Fo) components were determined. RESULTS: A total of 55 participants had mean age 46.2 ± 7.3 years, mean BMI 30.0 ± 3.7 kg/m2, and included 11 women (20%). Differences in mean pitch frequency, Fo, and peak sound frequency were all statistically significant between the RP and RL (p = 0.001), between ML and RL (p = 0.025) but were not significantly different between RP and ML. Mean pitch frequency of RP was lower than RL, and ML frequency was between RL and RP. The sound analysis graphics revealed RP waves with sharp peaks and lower frequencies and RL with smooth curves and higher frequencies. ML showed irregular patterns. Mean pitch frequency of RL was always above 400 Hz, whereas RP was below this value. CONCLUSIONS: It is feasible to apply sound analysis to determine the site of obstruction during DISE. Combining the data may help surgeons make more accurate assessments of the pattern of the disease.

Video head impulse testing in patients with benign paroxysmal positional vertigo.

BACKGROUND: Vestibulo-ocular reflex (VOR) function is expected to be normal in patients with benign paroxysmal positional vertigo (BPPV) during sudden head rotations. AIM: The aim of this study is to analyze VOR by video head impulse test (vHIT) in patients with BPPV in order to determine the potential value of clinical application of vHIT in BPPV. MATERIAL AND METHOD: Sixty patients with BPPV were included for the study from out-patient admissions. The main outcome measures were the gain of VOR, gain asymmetry, and refixation saccades. Fifteen healthy subjects with no history of dizziness were selected as normal control. RESULTS: Mean VOR gain during lateral head impulse in patients with geotropic type LC BPPV was 0.85 ± 0.22. Mean VOR gain during lateral head impulse in patients with ageotropic type LC BPPV was 0.78 ± 0.16. Fourteen patients with PC BPPV (35%; 40/13) had low gain during ipsilesional head impulses. Seven patients had low gain during counterlesional head impulses. Mean VOR gain during vertical head impulse in patients with PC BPPV was 0.73 ± 0.24. Nine patients with posterior canal BPPV (25%; 9/40) and 2 patients with LC BPPV (11%; 2/18) had corrective saccades. None of the results showed significant difference in comparison to control group. CONCLUSION AND SIGNIFICANCE: VHIT analysis demonstrated that VOR function was normal on the BPPV side.

A novel Turkish instrument for assessing quality of life in chronic otitis media ­translation and validation of Zurich chronic middle ear inventory

Background/aim: The Zurich Chronic Middle Ear Questionnaire (ZCMEI-21) is a newly-developed German-language questionnaire. The purpose of this study was to analyze the quality of life (QoL) of chronic otitis media (COM) patients and translate, transculturally adapt, and validate the ZCMEI-21 into Turkish. Materials and methods: Based on internationally accepted guidelines, the ZCMEI-21 was translated into Turkish. To assess its validity, the total score of the ZCMEI-21-Tur was compared to the scores taken from the original validation study and a question that was directly related to the health-related QoL (HRQoL), as well as the general criterion EQ-5D-5L. Questionnaires were completed by healthy volunteers and the results were evaluated statistically. Results: A total of 80 COM patients and 40 healthy volunteers were prospectively enrolled in this study. Regarding internal consistency, the questionnaire showed a Cronbach α of 0.94, which indicated high internal consistency. Moreover, internal consistency was also determined to be excellent for the Cronbach α of the individual subscales, as follows: ear sign symptoms, 0.79; hearing, 0.83; psychosocial impact, 0.91, and medical resources, 0.84. Conclusions: The ZCMEI-21 was translated into Turkish and validated. Therefore, the ZCMEI-21-Tur was suitable for use in assessing HRQoL in adult patients with COM.

[Short term olfactory memory and olfactory function after inhalation anesthetic agents: a randomized clinical trial]. / Memória olfativa de curta duração e função olfativa após anestésicos inalatórios: estudo clínico randomizado.

BACKGROUND AND OBJECTIVES: This clinical trial aimed to evaluate the effects of two different inhalation anesthetic agents on postoperative olfactory memory and olfactory function in patients who underwent micro laryngeal surgery. METHODS: This randomized prospective controlled study consisted of 102 consecutive patients with a voice disorder. The patients underwent micro laryngeal surgery for voice disorders under general anesthesia. Patients who did not meet inclusion criteria and/or declined to participate (n=34) were excluded from the study. Patients were divided into two groups. Four patients from Group 1 and four patients from Group 2 were lost to follow-up. Group 1 (n=30) received sevoflurane, and Group 2 (n=30) received desflurane during anesthesia. We compared the results by performing the pre-op and post-op Connecticut Chemosensory Clinical Research Center Olfactory test. RESULTS: Thirty-three patients (55%) were male and 27 (45%) were female. The mean age was 48.18±13.88 years (range: 19-70 years). Preoperative and postoperative olfactory functions did not show a significant difference within the groups postoperatively (p> 0.05). Preoperative and postoperative olfactory memory showed a significant decrease 3hours after the surgery (p <0.05). CONCLUSIONS: Olfactory functions and memory were not affected by desflurane in the early postoperative period. Although sevoflurane did not affect olfactory functions, it had a temporary negative effect on olfactory memory in the early postoperative period.

The impact of platelet-rich fibrin (PRF) on olfactory function and pain after septoplasty operations.

BACKGROUND: We aimed to investigate the effect of platelet-rich fibrin (PRF) on olfactory function and pain score in patients who underwent septoplasty. METHODS: This prospective randomized observational study was performed between 2018 January and 2019 April with 148 patients who had septoplasty operation. Patients were divided two groups and 74 patients were placed in group 1 to which PRF was applied after the completion of septoplasty whereas 67 patients were put in group 2 which did not undergo PRF. Sniffin' Sticks test was applied to all patients at pre-op, post-op 1-week, 6-week, and 6-month. Pain scores of patients were measured with visual analogue scale at 1 and 3 week. RESULTS: The distribution of patients according to pre-op olfactory function (normo-hypo-anosmia), there was no significant differences statistically (p > 0.05). When we compared the 1-week post-op results of Sniffin' Sticks test of patients, we found differences between the groups (p < 0.05). It was observed in the early postoperative period that according to the Sniffin' Sticks test scores, the results of the PRF group were better than those of the non-PRF group. At 6-week and 6-month, between the groups; there was no differences in terms of olfactory function. When we looked at the pain score of patients at 1 and 3 week after septoplasty; significant differences were obtained between groups. CONCLUSION: The application of PRF to the mucosal surface after the completion of septoplasty, has positive effect on olfactory function and pain especially in the early postoperative period. During the healing process, it was observed that prf maintained better odor functions. It is a minimally invasive technique with low risks and satisfactory clinical results.

Short term olfactory memory and olfactory function after inhalation anesthetic agents: a randomized clinical trial / Memória olfativa de curta duração e função olfativa após anestésicos inalatórios: estudo clínico randomizado

Abstract Background and objectives: This clinical trial aimed to evaluate the effects of two different inhalation anesthetic agents on postoperative olfactory memory and olfactory function in patients who underwent micro laryngeal surgery. Methods: This randomized prospective controlled study consisted of 102 consecutive patients with a voice disorder. The patients underwent micro laryngeal surgery for voice disorders under general anesthesia. Patients who did not meet inclusion criteria and/or declined to participate (n = 34) were excluded from the study. Patients were divided into two groups. Four patients from Group 1 and four patients from Group 2 were lost to follow-up. Group 1 (n = 30) received sevoflurane, and Group 2 (n = 30) received desflurane during anesthesia. We compared the results by performing the pre-op and post-op Connecticut Chemosensory Clinical Research Center Olfactory test. Results: Thirty-three patients (55%) were male and 27 (45%) were female. The mean age was 48.18 ± 13.88 years (range: 19‒70 years). Preoperative and postoperative olfactory functions did not show a significant difference within the groups postoperatively (p > 0.05). Preoperative and postoperative olfactory memory showed a significant decrease 3 hours after the surgery (p < 0.05). Conclusions: Olfactory functions and memory were not affected by desflurane in the early postoperative period. Although sevoflurane did not affect olfactory functions, it had a temporary negative effect on olfactory memory in the early postoperative period.

Resumo Introdução e objetivos: O estudo avaliou o efeito pós-operatório de dois agentes anestésicos inalatórios distintos na memória olfativa de curta duração e na função olfativa em pacientes submetidos à microcirurgia de laringe. Método: O estudo prospectivo controlado randomizado avaliou, consecutivamente, 102 pacientes com alteração vocal submetidos à microcirurgia de laringe sob anestesia geral. Trinta e quatro pacientes não obedeceram aos critérios de inclusão e/ou não aceitaram participar do estudo e foram excluídos. Os pacientes foram divididos em dois grupos. Quatro pacientes do Grupo 1 e quatro do Grupo 2 foram perdidos durante o seguimento. O Grupo 1 (n = 30) recebeu sevoflurano durante a anestesia e o Grupo 2 (n = 30), desflurano. Comparamos resultados pré e pós-operatórios de memória olfativa e funções olfativas, realizando o Connecticut Chemosensory Clinical Research Center Olfactory test. Resultados: Foram incluídos um total de 33 (55%) homens e 27 (45%) mulheres. A idade média foi 48,18 ± 13,88 anos (variação: 19-70 anos). As funções olfativas pré e pós-operatórias não apresentaram diferença estatisticamente significante dentro dos grupos no pós-operatório (p > 0,05). A memória olfativa pré e pós-operatória não mostrou diminuição estatisticamente significante quando avaliada três horas após a cirurgia (p< 0,05). Conclusões: Memória e funções olfativas não foram alteradas pelo desflurano no pós-operatório imediato. Embora o sevoflurano não tenha alterado as funções olfativas, causou efeito temporário negativo na memória olfativa no pós-operatório imediato.

The Effect of Gastric Helicobacter pylori Colonization on Nasal Functions.

The aim of this study is to investigate the effect of gastric Helicobacter pylori colonization on nasal functions. The study enrolled patients (n = 100) who underwent endoscopy for gastroesophageal reflux disease. Patients with laryngopharyngeal reflux (LPR) were identified by Reflux Symptom Index (RSI) and Reflux Finding Score (RFS). Patients were divided into 2 groups: LPR (+) (n = 64) H pylori (+), RSI > 13, RFS > 7; LPR (-) (n = 36) H pylori (+), RSI < 13, RFS < 7. Visual analog scale (VAS), sinonasal outcome test-22 (SNOT-22), peak nasal inspiratory flowmeter (PNIF), mucociliary clearance (MCC), and olfactory tests were used to evaluate the nasal functions. The average VAS for nasal obstruction, PNIF, and MCC did not differ significantly between the LPR (+) and LPR (-) groups (P > .05). However, the average olfactory test scores were lower in the LPR (+) patients than the LPR (-) patients (P < .05). Also, the SNOT-22 scores were significantly higher in LPR (+) patients than in LPR (-) (P < .01). Nasal functions and symptom scores were also evaluated according to the H pylori grading. The PNIF, MCC, SNOT-22, and olfactory test results deteriorated as the gastric mucosal H pylori colonization increased (P < .05). In conclusion, nasal functions differed between LPR disease and GERD only, while the density of H pylori colonization in the gastric mucosa had an effect on nasal function.

Comparison of Olfactory Function and Quality of Life With Different Surgical Techniques for Nasal Septum Deviation.

OBJECTIVE: To assess the nasal functions, nasal resistance, olfactory function, and quality of life in different surgical techniques for nasal septum deviation STUDY DESIGN:: Randomized controlled trial. METHODS: This prospective controlled study was carried out on patients who underwent septoplasty. Patients participating in the study were divided into 2 groups; group 1: classic septoplasty (n: 25) and group 2: extracorporeal septoplasty (n: 14). The sinonasal outcome test-22 (SNOT-22), peak nasal flowmetry, and Connecticut Chemosensory Clinical Research Center test were applied to all patients before and 8 weeks after surgery. Surgical outcomes also assessed to evaluate complications 6 months after surgery. RESULT: In total, 39 (27 males, 12 females) patients diagnosed with nasal septum deviation were included in this study. A septoplasty was performed in all patients: 25 of them (18 males, 7 females; mean age = 29.4 [range, 23-50] years) underwent classic septoplasties and 14 (9 males, 5 females; mean age = 31.3 [range, 23-50] years) underwent extracorporeal septoplasties. Airway openness was achieved in all patients. As a result, the SNOT-22 scores, peak nasal inspiratory flowmeter results, and smell function scores showed significant improvements (P < 0.001). CONCLUSION: All corrective surgical methods for a septum deviation have positive effects on nasal airflow, quality of life, and olfaction. The rates of complications were not significantly different between 2 treatment groups.

Assessment of Resonant Voice Therapy in the Treatment of Vocal Fold Nodules.

OBJECTIVE: This study aimed to evaluate objective and subjective changes in the voices of adults with vocal fold nodules who received resonant voice therapy. METHODS: Twenty-six female patients who had bilateral vocal fold nodules and 30 healthy women were included in the study. Patients were treated with vocal hygiene education and resonant voice therapy. Voice records were obtained for acoustic and aerodynamic analysis. Fundamental frequency, jitter, shimmer, and noise-to-harmonic ratio were analyzed for acoustic analysis. Maximum phonation time was used for aerodynamic evaluation. Voice Handicap Index 10 was completed by patients for subjective assessment. After 8 weeks of therapy analyses were repeated. RESULTS: Stroboscopic analysis revealed that 14 patients had total and 9 had partial regression. Fundamental frequency increased from 152.27 ± 28.34 to 199.56 ± 11.25 in study group and this was statistically significant. Jitter, shimmer, and noise-to-harmonic ratio improvements were also significant. Voice Handicap Index scores decreased from 22.25 ± 3.82 to 8.92 ± 5.48 and this was statistically significant. CONCLUSION: Our finding that resonant voice therapy improved objective and subjective parameters of vocal function in patients with vocal fold nodules indicates that it is an effective treatment for VFNs and should be considered a therapeutic option.

Comparison of the Effects of Cigarette Smoking on Male and Female Vocal Folds.

OBJECTIVE: To investigate effects of smoking cigarette on male and female larynges and compare them. METHOD: Eighteen adult Wistar Albino rats were included to study; 9 were male and 9 female. The exposure groups each contained 6 rats, and the control groups 3 rats. Six male constituted group 1 and 6 female constituted group 2. Group 1 and 3 were exposed to smoke. Group 2 and 4 were composed of 3 males and 3 females, respectively. Smoke from 10 cigarettes was delivered in each of the morning and afternoon daily for 1 month. At the end of 4 weeks, all rats were sacrificed and their larynges were evaluated histopathologically. RESULTS: Microscobic evaluation of epithelium of vocal folds revealed no significant difference between study groups. There was also no difference between study and control groups. Subepitelial tissue showed no difference between study groups but angiogenesis and inflammation were higher in study groups. Epithelial analysis of false vocal folds showed significant difference between study groups. Female epithelium showed more hyperplastic and metaplastic changes. CONCLUSION: Cigarette smoke damaged both the vocal folds and false vocal folds. The female false vocal folds were more susceptible to damage than the males.

Histopathological Analysis of the Effects of Corticosteroids on Vocal Cords: Experimental Study.

Local treatment with corticosteroids results in side effects involving the upper respiratory tract including candidiasis, sore throat, and dysphonia. Although these effects are well known, they have not been evaluated using a histopathological approach. This study investigated the histopathological aspects of steroid-induced dysphonia. A total of 16 female Wistar albino rats were divided into two groups. The eight rats in the experimental group were given an inhaled dose of mometasone furoate daily for 4 weeks. The control group was kept at room temperature for 4 weeks. The vocal cords were evaluated histopathologically using hematoxylin and eosin staining. Both groups had typical epithelial lining and basal membranes. Inflammation differed between the two groups (P = 0.024). There were no differences in squamous metaplasia and hyperplasia (P = 0.302 and 0.302, respectively). This study revealed that inhaled corticosteroids inhibit mucosal immunity, and may result in reversible mucosal changes.

The Effects of Exposure to Environmental Cigarette Smoke on the Vocal Folds of Rats.

OBJECTIVE: This study aimed to investigate histopathologically and immunohistochemically the effects of environmental smoke on the vocal folds. METHODS: This study examined 20 healthy Wistar albino rats, which were divided into four groups of five rats. Group 1 was exposed to smoke for 45 days and group 2 for 90 days. Groups 3 and 4 were the respective control groups. The rats in groups 1 and 3 were sacrificed on day 45 and those in groups 2 and 4 on day 90. The larynx specimens were stained with hematoxylin and eosin, and the inflammation, hyperplasia, and metaplasia were evaluated. Ki-67 staining was used for the immunohistochemical analysis. RESULTS: There was no significant difference in mononuclear cell infiltration between the experimental and control groups (group 1 vs. group 3 P = 0.20, group 2 and 4 P = 0.41) (Table 3), but there was a significant difference between the two experimental groups (P = 0.007). Mild and moderate hyperplasia was seen in groups 1 and 2, respectively. CONCLUSION: Environmental exposure to cigarette smoke has destructive effects on the vocal folds of rats.

Effects of intratympanic dexamethasone on noise-induced hearing loss: An experimental study.

AIM: Aim of the study was to evaluate the effect of intratympanic steroid treatment on hearing based on oto-acoustic emission. METHODS: A total of 16 healthy female Wistar albino rats weighing were used in this study. They were divided in to 2 groups and each group was exposed to noise at 110dB for 25min to induce acoustic trauma. Intratympanic dexamethasone was administered to the middle ears of animals in the experimental group on the same day as exposure to noise. The control group was given 0.09% saline solution. Distortion product otoacoustic emission measurements were performed on days 7 and 10. RESULTS: There were no differences between the emission results of two groups before treatment at 4004, 4761, 5652, 6726, and 7996Hz. There were significant group differences on measurement days 7 and 10 at all frequencies. CONCLUSION: Our study revealed a significant difference in DPOAE measurements on days 7 and 10 between the experimental and control groups. We detected a positive effect of dexamethasone on noise-induced hearing loss.