Active clinical trials for "Hearing Loss, Sensorineural"

The aim of this study is to understand how audiometric, cognitive and electrophysiological results relate to sentence recognition score in adults using currently a Nucleus cochlear implant.

The purpose of this study is to determine the true incidence of long QT (LQT) amongst a large cohort of subjects diagnosed with unilateral (right/left) or bilateral sensorineural hearing loss.

Do adults and children over 7 years of age with unilateral or assymetric hearing loss benefit from cochlear implantation on the worst hearing side.

This study aims to understand how to manipulate the electrical stimulation from the cochlear implant to maximize hearing stimulation and minimize facial stimulation. It is know from animal data that the hearing and facial nerves have different sensitivities to things like electrical pulse shape, its pattern, and its duration. It is very unclear however if this applies to human cochlear implant patients, and what the optimal parameters are to selectively stimulate the hearing nerve in humans. The outcomes of this study will be used to more selectively program some patients with severe facial nerve cross stimulation and to inform the development of new types of implant stimulation.

The objective of this multisite study is to evaluate the performance of the Nucleus Freedom cochlear implant system in a large population of sequentially implanted pediatric subjects.

This study will try to identify and understand the genetic factors that lead to an inner ear malformation called "enlarged vestibular aqueducts", that can be associated with hearing loss. Patients with sensorineural hearing loss with or without inner ear malformations and their parents and siblings may be eligible for this study. Participants and their immediate family members, may undergo some or all of the following tests and procedures: Medical and family history, including questions about hearing, balance and other ear-related issues, and review of medical records. Routine physical examination. Blood draw or buccal swab (brushing inside the cheek to collect cells) - Tissue is collected for DNA analysis to look for changes in genes that may be related to hearing loss. Hearing tests - The subject listens for tones emitted through a small earphone. Balance test (VEMP) to see if balance functions of the inner ear are associated with the hearing loss Electrodes will be placed behind your ear and at the base of your neck. From a reclining position, you will be asked to raise your head while clicking sounds are played into your ears. - Ultrasound tests - An inner ear malformation called EVA (enlargement of the vestibular aqueduct) indicates that a genetic disorder called Pendred syndrome may be the cause. Because thyroid abnormalities are also associated with Pendred syndrome, an ultrasound examination of the thyroid gland may be done. Computed tomography (CT) and magnetic resonance imaging (MRI) scans - These tests show the structure of the inner ear. For CT, the subject lies still for a short time while X-ray images are obtained. For MRI, the patient lies on a stretcher that is moved into a cylindrical machine with a strong magnetic field. The magnetic field and radio waves produce images of the inner ear. The radio waves cause loud thumping noises that can be muffled by the use of earplugs.

This study will try to identify the genetic causes of hereditary hearing loss or balance disorders. People with a hearing or balance disorder that affects more than one family member may be eligible for this study. They and their immediate family members may undergo some or all of the following procedures: Medical and family history, including questions about hearing, balance and other ear-related issues, and review of medical records. Routine physical examination. Blood draw or buccal swab (brushing inside the cheek to collect cells) - Tissue is collected for DNA analysis to look for changes in genes that may be related to hearing loss. Hearing tests - The subject listens for tones emitted through a small earphone. Balance tests to see if balance functions of the inner ear are associated with the hearing loss In one test the subject wears goggles and watches moving lights while cold or warm air is blown into the ears. A second test involves sitting in a spinning chair in a quiet, dark room. Photograph - A photograph may be taken as a record of eye shape and color, distance between the eyes, and hair color. Computed tomography (CT) and magnetic resonance imaging (MRI) scans - These tests show the structure of the inner ear. For CT, the subject lies still for a short time while X-ray images are obtained. For MRI, the patient lies on a stretcher that is moved into a cylindrical machine with a strong magnetic field. The magnetic field and radio waves produce images of the inner ear. The radio waves cause loud thumping noises that can be muffled by the use of earplugs.

Introduction: Surgical site infections associated with the cochlear implant can have serious consequences. Although advances in surgical techniques reduce these complications, it may be necessary to remove a device that works as a last resort as a result of ongoing infection. The removal of these devices, which are very expensive, increases the cost and takes the chance of hearing patients with this device. Therefore, it is very important to identify patients with a tendency to cochlear implant infection before surgery and to prevent these infections from occurring. Neutrophil/ lymphocyte ratio (NLR) and platelet/ lymphocyte ratio (PLR) are indicative of systemic inflammation and have a prognostic value in relation to mortality and morbidity in many diseases. The aim of this study was to identify patients with post-operative implant infection tendency in patients to be implanted with cochlear implant and to plan treatment for possible infections before cochlear implant, to reduce cost by preventing removal of implanted cochlear implant due to infection and to prevent the patient's chance of hearing through the cochlear implant from disappearing due to infection. Methods: In this retrospective study, 13 patients with cochlear implant infection were included. Preoperative NLR was calculated by dividing the neutrophil (NEU) value by the lymphocyte (LYM) value and preoperative PLR was calculated by dividing the NEU value by the LYM value.

This study focuses on the genetics and metabolism of Donnai-Barrow Syndrome (DBS).

The accurate assessment of auditory status is critical for planning treatment for Veterans with hearing loss to include medical and audiological management. Current physiologic tests of auditory function in the standard clinical audiological test battery for Veterans have limited sensitivity in detecting some middle-ear disorders, and do not include a direct test of cochlear function. Recent studies have shown promise for new wide-bandwidth (WB) tests of absorbance for improved sensitivity in the assessment of middle-ear function including acoustic reflex testing. The addition of WB tests of cochlear function included in the WB test battery provides an opportunity to improve audiological diagnosis of a range of hearing disorders in Veterans. The automation provided by the WB test battery could provide additional benefits in reducing the duration of the evaluation, leaving more time for evaluation of test findings and counseling. Results from this study may lead to the improvement of audiological care for Veterans with hearing loss.