KSVP

SEP (short-latency auditory evoked potentials) is an objective test of hearing in a child and an adult in a state of natural or medicated sleep, lasting about 60 minutes.

CVEPs are used to diagnose various types of deafness, tinnitus, disorders in the development of the auditory system in children and other hearing-related diseases. These are special electrical signals that arise in the human brain in response to sound stimuli. They are recorded using electroencephalography (EEG) and allow one to assess the functional state of the auditory system, as well as identify possible pathologies and hearing disorders.

INDICATIONS FOR KSVP

• there was a suspicion of a retrocochlear disorder in the auditory analyzer system;
• organ neuropathy was diagnosed;
• there is a decrease in hearing acuity;
• an objective assessment of the hearing threshold is needed;
• it is difficult for the child to speak due to delayed speech development;
• before choosing a corrective hearing aid.

CONTRAINDICATIONS TO KSVP

• sulfur plugs;
• history of epilepsy;
• mental disorders;
• presence of electrical pacemakers;
• skin damage at the site where the electrodes are installed.

HOW IS THE STUDY OF KSVP CONDUCTED?

Children are examined primarily while they sleep, so that their movements do not distort the brain’s response to sound waves. The process lasts up to 2.5 hours, from the moment the child goes to sleep. The study using the KSVP method in adult patients takes less time: up to 40 minutes. Patients are examined at rest.

The analysis technique is completely painless. The doctor attaches electrodes to the prepared areas of skin behind the ears and on the forehead. The areas are treated with alcohol and a special paste. Sounds are supplied through soft earbuds, as well as through a bone vibrator. Registration of CVEP is carried out on broadband click pulses, as well as on frequency pulses from 500 to 4000 Hz. The patient does not feel anything during the examination.