Electronystagmographic changes in pupils with profound hearing loss

The vestibular dysfunction is significantly present in profound sensory neural hearing loss and the acquired causes of deafness showed the higher abnormality of the vestibular system and postnatal acquired hearing loss is the most affected group

effects of treatment with praziquantel on hearing

Praziquantel is a commonly used broad spectrum antihelminthic drug. It has totally replaced the antimonial compounds in the treatment of schistosomiasis. In this work 109 patients were included to study the audiometric changes produced by the drug in the routine treatment regimen for schistosomiasis. Pretreatment pure tone audiograms were obtained for all patients on air and bone conduction. They were then repeated after 24 hours of treatment, one week and one month after treatment. Eight patients out of 109 developed marked significant changes in their audiogram, defined as more than 15 dB from previous readings. The results concluded that praziquantel treatment can cause mild audiometric changes mainly in the higher frequencies for a transient period which was followed by a return to normal hearing. Full audiological assessment to all patients undergoing treatment with praziquantel is highly recommended

Assessment of hearing in traffic men in Ismailia

280 policemen working in Ismailia Governorate were subjected to audiological evaluation to detect the effects of traffic noise on their hearing thresholds. 115 of them were traffic-men and 155 were controls. The results showed marked decrease of hearing at 4 KHz in different age groups of traffic-men, especially between 31-40 years which was statistically significant compared with the control group. The left ear was affected more than the right ear at all ages and in both groups. The duration of exposure to noise was directly related to the degree of hearing loss in the first ten years of work. Reduction of the duration of exposure is recommended

Change of acoustic features of voice before and after hearing aid fitting

This study included 19 patients with sensorineural hearing loss and one patient with mixed hearing loss. Acoustic analysis of sustained phonation of 3 vowels /a/, /i/, and /u/ was done using computerized speech laboratory manufactured by KAY before and after hearing and fitting. The analysis included average pitch, jitter and shimmer. There was a decrease in average pitch in most cases of /a/ and /u/ vowels and increase in most cases of /i/ vowel. As regards jitter there was increase in most cases of /i/ and /u/ vowels and decrease in most cases of /a/ vowel. Shimmer showed increase in most cases of the three vowels. It was suggested that these changes are mainly due to the effect of the improved auditory feedback after fitting