Objective
To evaluate the utility of pre-operative transtympanic electrically evoked auditory brainstem responses and post-operative neural response telemetry in auditory neuropathy spectrum disorder patients.
Methods
Four auditory neuropathy spectrum disorder patients who had undergone cochlear implantation and used it for more than one year were studied. All four patients underwent pre-operative transtympanic electrically evoked auditory brainstem response testing, intra-operative and post-operative (at 3, 6 and 12 months after switch-on) neural response telemetry, and out-patient cochlear implant electrically evoked auditory brainstem response testing (at 12 months).
Results
Patients with better waveforms on transtympanic electrically evoked auditory brainstem response testing showed superior performance after one year of implant use. Neural response telemetry and electrically evoked auditory brainstem response measures improved in all patients.
Conclusion
Inferences related to cochlear implantation outcomes can be based on the waveform of transtympanic electrically evoked auditory brainstem responses. Robust transtympanic electrically evoked auditory brainstem responses suggest better performance. Improvements in electrically evoked auditory brainstem responses and neural response telemetry over time indicate that electrical stimulation is favourable in auditory neuropathy spectrum disorder patients. These measures provide an objective way to monitor changes and progress in auditory pathways following cochlear implantation.
Background
The occurrence of retained ear mould impression material is rare and can lead to complications. The current case report describes one such complication, where the silicone impression material used to take the impression of the ear canal flowed into the middle ear through the pre-existing tympanic membrane perforation. Five days later, the patient presented with worsened hearing and blood-tinged discharge from the ear. Ear microscopy revealed a greenish foreign body in the middle ear.
Case report
The foreign body was removed by tympanotomy and the perforation repaired using a temporalis fascia graft. A hearing aid was prescribed after ensuring that the perforation had healed.
Conclusion
It is essential that the audiologist perform a basic otological examination before prescribing a hearing aid and preparing an ear mould. A clinical approach algorithm for audiologists, for prior to taking an impression, is suggested.
The lesions of pinna are not uncommon. Pinna, a delicate, vulnerable structure is more liable for trauma. The present study aimed to examine the various types of benign lesions of pinna and management with appropriate intervention. Materials and Methods : This prospective study was conducted for a period of 2 years in Department of ENT of our medical college Hospital, Bengaluru, Karnataka, India. A total of 140 subjects were examined in this study from ENT out patient department. The patients with various benign lesions of pinna were included in this study. A detailed clinical history regarding onset, predisposing factors and associated conditions were collected. Routine blood and urine examination were done. Depending on the type of lesion patients were managed conservatively or surgically. Results: A total of 140 subjects were examined in this study. Majority of the patients were in the age group of 21-30 years. i.e. 61(44%) patients, followed by 29(21%) were in the 31-40 years. Most of the patients presented with Keloid, 56(39%), 42 (32%) cases were Pseudocyst of auricle, 37(26%) were Perichondritis, Herpes Zoster Oticus and sebaceous cyst were observed in 2 cases each, followed by a case of Neurofibroma. Keloid was more predominant in females than males. Pseudocyst of auricle and Perichondritis were little more in males than female subjects. Keloid was unilateral in 43(77%) patients and bilateral in 13(23%) cases. Trauma is the predisposing factor in most of the cases, followed by ear piercing/iatrogenic. Keloid patients were managed with complete excision of the lesion followed by intralesional triamcinolone. Pseudocyst auricle was observed in 42 patients, its prevalence was more in males. Trauma is the main pre-disposing factor. Pseudocyst auricle was managed by aspiration, and by window procedure. Perichondritis was observed in 37 cases, again trauma was the main predisposing factor observed in 54% cases followed by ear piercing/iatrogenic in 27% cases. In addition, 78% cases were managed by incision and drainage and 22% cases were managed conservatively with broad spectrum antibiotics. Recurrence in 5% cases of keloid, 29% cases of pseudocyst of auricle was observed after complete excision and aspiration respectively. Conclusion: Our study results conclude that various benign lesions of pinna such as keloid, pseudocyst of auricle, perichondritis, Herpes Zoster Oticus, sebaceous cyst, and neurofibroma of pinna can be managed conservatively or surgically. Trauma is the most important predisposing factor in majority of the lesions. Diabetes Mellitus plays a pivotal role in the prognosis of perichondritis and Herpes Zoster Oticus.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.