The protective effect of Ginkgo biloba extract against experimental cisplatin ototoxicity: animal research using distortion product otoacoustic emissions

2012 ◽  
Vol 126 (11) ◽  
pp. 1097-1101 ◽  
Author(s):  
B Cakil ◽  
F Suren Basar ◽  
S Atmaca ◽  
S Kurnaz Cengel ◽  
A Tekat ◽  
...  
Keyword(s):  
Cell Membrane ◽  
Protective Effect ◽  
Ginkgo Biloba ◽  
Otoacoustic Emissions ◽  
Calcium Content ◽  
Otoacoustic Emission ◽  
Albino Rats ◽  
Distortion Product Otoacoustic Emission ◽  
Free Oxygen Radical ◽  
Distortion Product

AbstractBackground:Cisplatin, an effective therapeutic agent for various human cancers, has dose-limiting side effects of ototoxicity and nephrotoxicity. Cisplatin ototoxicity is thought to result from increased amounts of toxic free radicals or cell membrane changes leading to increased intracellular calcium content. Ginkgo biloba extract prevents lipid peroxidation, decreases intracellular free oxygen radical levels, regulates the cell membrane calcium transport mechanism and prevents cell death. This study aimed to investigate the protective effect of Ginkgo biloba extract against cisplatin-induced ototoxicity in rats.Methods:Twenty Wistar albino rats with normal hearing (confirmed by distortion product otoacoustic emission testing prior to cisplatin application) were randomly allocated to two groups. Both groups received a single intraperitoneal dose of cisplatin (12 mg/kg). Group two also received daily intraperitoneal doses of Ginkgo biloba extract (100 mg/kg) for 10 days. Distortion product otoacoustic emission measurements were repeated on days 10 and 17 and signal-to-noise ratios were compared.Results:Compared with group one, group two had significantly better distortion product otoacoustic emission results at 3, 4, 6 and 8 kHz on days 10 and 17.Conclusion:These findings suggest that Ginkgo biloba extract protects the inner ear against cisplatin-induced ototoxicity.

Prevention of gentamicin ototoxicity with N-acetylcysteine and vitamin A

2016 ◽  
Vol 130 (5) ◽  
pp. 440-446 ◽  
Author(s):  
I Aladag ◽  
M Guven ◽  
M Songu
Keyword(s):  
Vitamin A ◽  
Protective Effect ◽  
Otoacoustic Emissions ◽  
Otoacoustic Emission ◽  
Distortion Product Otoacoustic Emission ◽  
Signal To Noise ◽  
Distortion Product ◽  
Intratympanic Gentamicin ◽  
Gentamicin Ototoxicity ◽  
Significant Protective Effect

AbstractObjective:To investigate the use of systemic N-acetylcysteine and vitamin A in the prevention of gentamicin ototoxicity in rats.Methods:Forty-two Wistar rats were divided into four groups according to treatment: intratympanic saline, intratympanic gentamicin, intraperitoneal vitamin A after intratympanic gentamicin, and intraperitoneal N-acetylcysteine after intratympanic gentamicin. Signal-to-noise ratio and distortion product otoacoustic emissions were evaluated in all groups.Results:N-acetylcysteine had a significant protective effect at 1.5, 2, 3, 4, 6 and 8 kHz, whilst vitamin A had a significant protective effect at 2, 3, 4 and 6 kHz, as determined by the distortion product otoacoustic emission measurements. According to the signal-to-noise measurements, N-acetylcysteine had a significant protective effect at 1.5, 2, 3, 4, 6 and 8 kHz, whilst vitamin A had a significant protective effect at 3, 6 and 8 kHz.Conclusion:Gentamicin-induced hearing loss in rats may be prevented by the concomitant use of vitamin A and N-acetylcysteine. Specifically, N-acetylcysteine appeared to have a more protective effect than vitamin A for a greater range of noise frequencies.

Effect of mastoid drilling on hearing of the contralateral ear

2013 ◽  
Vol 127 (10) ◽  
pp. 952-956 ◽  
Author(s):  
A Goyal ◽  
P P Singh ◽  
A Vashishth
Keyword(s):  
Hearing Loss ◽  
High Frequency ◽  
Otoacoustic Emissions ◽  
Pure Tone Audiometry ◽  
Otoacoustic Emission ◽  
Prospective Clinical Study ◽  
Distortion Product Otoacoustic Emission ◽  
High Frequencies ◽  
Distortion Product ◽  
Contralateral Ear

AbstractObjectives:This study aimed to: understand the effect that high intensity noise associated with drilling (during otological surgery) has on hearing in the contralateral ear; determine the nature of hearing loss, if any, by establishing whether it is temporary or persistent; and examine the association between hearing loss and various drill parameters.Methods:A prospective clinical study was carried out at a tertiary centre. Thirty patients with unilateral cholesteatoma and normal contralateral hearing were included. Patients were evaluated pre-operatively and for five days following surgery using high frequency pure tone audiometry, and low and high frequency transient evoked and distortion product otoacoustic emission testing.Results:The findings revealed statistically significant changes in distortion product otoacoustic emissions at high frequencies (p = 0.016), and in transient evoked otoacoustic emissions at both low and high frequencies (p = 0.035 and 0.021, respectively). There was a higher statistical association between otoacoustic emission changes and cutting burrs compared with diamond burrs.Conclusion:Drilling during mastoid surgery poses a threat to hearing in the contralateral ear due to noise and vibration conducted transcranially.

The Effects of Body Position on Distortion-Product Otoacoustic Emission Testing

2004 ◽  
Vol 15 (08) ◽  
pp. 566-573 ◽  
Author(s):  
Carlie Driscoll ◽  
Joseph Kei ◽  
Jenny Shyu ◽  
Natasha Fukai
Keyword(s):  
Otoacoustic Emissions ◽  
Signal To Noise Ratio ◽  
Body Position ◽  
Otoacoustic Emission ◽  
Clinical Results ◽  
Distortion Product Otoacoustic Emission ◽  
Position Effects ◽  
Distortion Product ◽  
Emission Testing ◽  
Common Clinical Practice

Otoacoustic emissions are frequently acquired from patients in a variety of body positions aside from the standard, seated orientation. Yet little knowledge is available regarding whether these deviations will produce nonpathological changes to the clinical results obtained. The present study aimed to describe the effects of body position on the distortion-product otoacoustic emissions of 60 normal-hearing adults. With particular attention given to common clinical practice, the Otodynamics ILO292, and the measurement parameters of amplitude, signal-to-noise ratio, and noise were utilized. Significant position-related effects and interactions were revealed for all parameters. Specifically, stronger emissions in the mid frequencies and higher noise levels at the extreme low and high frequencies were produced by testing subjects while lying on their side compared with the seated position. Further analysis of body position effects on emissions is warranted, in order to determine the need for clinical application of position-dependent normative data.

The relationship between tinnitus pitch and parameters of audiometry and distortion product otoacoustic emissions

2017 ◽  
Vol 131 (11) ◽  
pp. 1017-1025 ◽  
Author(s):  
H Keppler ◽  
S Degeest ◽  
I Dhooge
Keyword(s):  
Hearing Loss ◽  
Otoacoustic Emissions ◽  
Otoacoustic Emission ◽  
Homeostatic Plasticity ◽  
Distortion Product Otoacoustic Emissions ◽  
Chronic Tinnitus ◽  
Distortion Product Otoacoustic Emission ◽  
Frequency Range ◽  
Distortion Product ◽  
The Relationship

AbstractObjectives:Chronic tinnitus is associated with reduced auditory input, which results in changes in the central auditory system. This study aimed to examine the relationship between tinnitus pitch and parameters of audiometry and distortion product otoacoustic emissions. For audiometry, the parameters represented the edge frequency of hearing loss, the frequency of maximum hearing loss and the frequency range of hearing loss. For distortion product otoacoustic emissions, the parameters were the frequency of lowest distortion product otoacoustic emission amplitudes and the frequency range of reduced distortion product otoacoustic emissions.Method:Sixty-seven patients (45 males, 22 females) with subjective chronic tinnitus, aged 18 to 73 years, were included.Results:No correlation was found between tinnitus pitch and parameters of audiometry and distortion product otoacoustic emissions. However, tinnitus pitch fell mostly within the frequency range of hearing loss.Conclusion:The current study seems to confirm the relationship between tinnitus pitch and the frequency range of hearing loss, thus supporting the homeostatic plasticity model.

Comparison of distortion product otoacoustic emissions and pure tone audiometry in occupational screening for auditory deficit due to noise exposure

2015 ◽  
Vol 129 (12) ◽  
pp. 1174-1181 ◽  
Author(s):  
N Wooles ◽  
M Mulheran ◽  
P Bray ◽  
M Brewster ◽  
A R Banerjee
Keyword(s):  
Otoacoustic Emissions ◽  
Pure Tone ◽  
Noise Exposure ◽  
Outer Hair Cell ◽  
Cell Function ◽  
Pure Tone Audiometry ◽  
Otoacoustic Emission ◽  
Distortion Product Otoacoustic Emissions ◽  
Distortion Product Otoacoustic Emission ◽  
Distortion Product

AbstractObjective:To examine whether distortion product otoacoustic emissions can serve as a replacement for pure tone audiometry in longitudinal screening for occupational noise exposure related auditory deficit.Methods:A retrospective review was conducted of pure tone audiometry and distortion product otoacoustic emission data obtained sequentially during mandatory screening of brickyard workers (n = 16). Individual pure tone audiometry thresholds were compared with distortion product otoacoustic emission amplitudes, and a correlation of these measurements was conducted.Results:Pure tone audiometry threshold elevation was identified in 13 out of 16 workers. When distortion product otoacoustic emission amplitudes were compared with pure tone audiometry thresholds at matched frequencies, no evidence of a robust relationship was apparent. Seven out of 16 workers had substantial distortion product otoacoustic emissions with elevated pure tone audiometry thresholds.Conclusion:No clinically relevant predictive relationship between distortion product otoacoustic emission amplitude and pure tone audiometry threshold was apparent. These results do not support the replacement of pure tone audiometry with distortion product otoacoustic emissions in screening. Distortion product otoacoustic emissions at frequencies associated with elevated pure tone audiometry thresholds are evidence of intact outer hair cell function, suggesting that sites distinct from these contribute to auditory deficit following ototrauma.

scholarly journals Peran Ginkgo biloba terhadap pencegahan gangguan dengar sensorineural pada terapi sisplatin penderita tumor ganas

2015 ◽  
Vol 44 (2) ◽  
pp. 96 ◽  
Author(s):  
Raden Mohamad Krisna Barata ◽  
Muhammad Thaufiq Siddiq Boesoirie ◽  
Ratna Anggraeni Soepardi Poerwana
Keyword(s):  
Hearing Loss ◽  
Sensorineural Hearing Loss ◽  
Ginkgo Biloba ◽  
Malignant Tumors ◽  
Otoacoustic Emission ◽  
Ginkgo Biloba Extract ◽  
Sensorineural Hearing ◽  
Egb 761 ◽  
Distortion Product Otoacoustic Emission ◽  
Distortion Product

Latar belakang: Kemoterapi sisplatin adalah terapi yang sering diberikan untuk penderita tumor ganas yang mempunyai efek samping ototoksik dengan terbentuknya radikal bebas yang enyebabkan kematian sel rambut luar koklea sehingga terjadi gangguan dengar. Ginkgo biloba adalah antioksidan yang terbukti memiliki efek otoprotektif terhadap ototoksisitas akibat sisplatin dengan menghambat pembentukan radikal bebas. Tujuan: Mengetahui peran Ginkgo biloba terhadap pencegahan gangguan dengar sensorineural pada penderita tumor ganas dengan sisplatin. Metode: Penelitian ini merupakan penelitian uji klinis acak dengan sampel adalah semua penderita tumor ganas yang mendapat kemoterapi sisplatin di Rumah Sakit Hasan Sadikin pada bulan Oktober 2013 sampai Januari 2014. Sampel dibagi dua, kelompok perlakuan menjalani pengobatan kemoterapi sisplatin dengan tambahan ekstrak Ginkgo biloba (Egb 761) peroral 80 mg perhari sejak 1 hari sebelum kemoterapi selama 30 hari. Kelompok kontrol menjalani pengobatan kemoterapi sisplatin saja. Pemeriksaan fungsi pendengaran dilakukan dengan timpanometri, audiometri, dan Distortion Product Otoacoustic Emission (DPOAE) sebelum dan setelah kemoterapi sisplatin siklus pertama dan kedua. Hasil: Didapatkan total 40 data dari 20 pasien yang dibagi dalam dua kelompok. Kejadian gangguan dengar sensorineural setelah siklus pertama dengan pemeriksaan DPOAE didapatkan perbedaan yang bermakna (p=0,027). Kesimpulan: Pemberian terapi ekstrak Ginkgo biloba 80 mg peroral dapat mencegah gangguan dengar sensorineural akibat kemoterapi sisplatin pada penderita tumor ganas. Kata kunci: Sisplatin, Ginkgo biloba, ototoksik, gangguan dengar sensorineural, tumor ganas.ABSTRACTBackground: Chemotherapy with cisplatin is a treatment which often given to patients with malignant tumors with side effects of ototoxicity due to the formation of free radicals that caused cochlea outer hair cells death, causing hearing impairment. Ginkgo biloba is an antioxidant with otoprotective effect to cisplatin induced ototoxicity by inhibiting the formation of free radicals. Purpose:To find out the role of Ginkgo biloba against sensorineural hearing loss in patients with malignant tumors treated with cisplatin. Methods: This is a quasiexperimental clinical trial. The subject were all patients with malignant tumors who received cisplatin chemotherapy in Hasan Sadikin Hospital from October 2013 until January 2014. Sample was divided into 2 groups, the first group (treatment) are those who undergoing cisplatin chemotherapy treatment with additional Ginkgo biloba extract (EGb 761) 80 mg per day orally, started from 1 day prior chemotherapy for 30 days. The second group (control) is those who underwnet only cisplatin chemotherapy. Auditory function were assesed by tympanometry, audiometry and Distortion Product Otoacoustic Emission (DPOAE) examination before and after the first and second cycles cisplatin chemotherapy. Result: The data from right and left ear were analyzed separately, giving total 40 data from 20 patients divided in 2 groups. The incidence of sensorineural hearing loss after first cycle of chemotherapy with the DPOAE results showed significant differencess (p=0,027). Conclusion: Ginkgo biloba extract 80 mg perday orally could prevent cisplatin-induced ototoxicity in patients with malignancy. Keywords: Cisplatin, Ginkgo biloba, ototoxic, sensorineural hearing loss, malignant tumors.

scholarly journals Effect of Caffeine on Otoacoustic Emissions

2021 ◽  
Author(s):  
Kumar Sanish Drepath ◽  
Athira Rajan ◽  
Srikanth Nayak ◽  
Arya Vijay ◽  
Sathish Kumar
Keyword(s):  
Otoacoustic Emissions ◽  
Signal To Noise Ratio ◽  
Large Population ◽  
Otoacoustic Emission ◽  
Distortion Product Otoacoustic Emission ◽  
Caffeine Consumption ◽  
Coffee Intake ◽  
Distortion Product ◽  
Study Results ◽  
Before And After

Abstract Introduction Caffeine is consumed everyday in a variety of ways by a large population around the world, including coffee, tea, and soft drinks. Therefore, there is a significant need to explore the effects of caffeine on human auditory system. The present study aimed to investigate the effect of caffeine on cochlea using distortion product otoacoustic emission (DPOAE). Materials and Methods Thirty-three young adults were recruited for the study. The effect of caffeine on cochlea was assessed using DPOAE at frequencies between 1 to 10 kHz before and after caffeine consumption. Results The signal to noise ratio of DPOAE was compared before and after coffee intake, which revealed no significant differences. Conclusion The current study results suggest that caffeine has no effect on cochlear functioning.

Sign in / Sign up

Export Citation Format

Share Document