A female 38 year old patient complained of mostly left hypoacusis for the past 4 years; mild bilateral tympanic membrane retraction was present. Audiometry disclosed moderate left conduction loss and slight right conduction loss; immitance testing revealed an A curve and absence of stapedian reflexes bilaterally. The diagnosis was otosclerosis and left stapedectomy was recommended. Perilymph gu...

Introduction: In order to achieve a higher success rate for tympanoplasty, different techniques have been developed, and a wide variety of grafting materials have been developed. One of the techniques currently receiving considerable attention involves not lifting the remaining of eardrum from the malleus and embedding the graft underneath in order to repair the eardrum correctly in its origina...

Combined hearing loss is an essential indication for implantable hearing systems. Depending on the bone conduction threshold, various options are available: Patients with mild sensorineural deafness usually benefit from transcutaneous BCI, while percutaneous BCI systems are recommended also for moderate hearing loss. For combined hearing loss with moderate and high-grade cochlear hearing loss, ...

Conduction in rat peripheral nerve has been monitored following the stimulated release of nitric oxide (NO) from diethylamine-NONOate (DEA-NONOate). Branches of the sciatic nerve were dissected, but left otherwise intact, and propagating signals recorded externally. At levels consistent with inflammation, NO exposure resulted in a complete loss of the compound action potential. Conduction was f...

The reverse conduction capability of MOSFETs is beneficial for the efficiency a three-phase inverter. In this article, analytical expressions in closed form are presented which allow to quickly evaluate losses, considering effect conduction, and blanking time both sinusoidal pulsewidth modulation operation with without third harmonic injection. losses silicon carbide MOSFET inverter suitable tr...

Unilateral Conductive or Mixed Hearing Loss Unilateral implantable bone conduction (bone-anchored) hearing aid may be considered medically necessary as an alternative to an air-conduction hearing aid in patients 5 years of age and older with a conductive or mixed hearing loss when ONE of the following medical criteria is met:  Congenital or surgically induced malformations (eg, atresia) of the...

Introduction: Hearing loss is fairly a common disorder which is usually treated with corticosteroids via systemic administration and/or intra-tympanic injection. This study aimed to compare the effectiveness of intra-tympanic injections of dexamethasone with its combination with hyaluronic acid in patients with sudden sensorineural hearing loss.   Materials and Methods: In this clinical trial, ...

The electrical conduction phenomena, dielectric response and microstructure have been discussed in sintered silicon nitride ceramics at different temperature and frequencies. Microstructure and phase of the sintered samples was investigated by Scanning Electron Microscope (SEM) and X-ray diffractometer (XRD). The electrical conductivity, dielectric constant and dielectric loss increases exponen...