SRT (Stapedial Reflexes Threshold) Test impedance-hearing-test, hearing-aid, digital-hearing-aid, widex-hearing-aid, widex-bd, Widex-Hearing-Center, SRT test,
Purpose of the SRT Test
Evaluate Middle Ear Function: It helps determine how well the stapedial reflex is working, which can provide insights into middle ear and auditory nerve function.
Diagnose Hearing Disorders: It can assist in diagnosing conditions that affect the auditory pathway, such as acoustic neuromas or other neural disorders.
Assess Reflex Pathway Integrity: The test evaluates the integrity of the auditory reflex pathway, including the middle ear, auditory nerve, and central auditory pathways.
How the SRT Test is Performed
Preparation: The patient is seated in a soundproof room. Headphones or insert earphones are used to deliver sound stimuli to each ear.
Sound Stimulation: Sounds at various intensities are played into the ear. These sounds are usually low-frequency tones or narrowband noise.
Reflex Measurement: The test measures the reflexive contraction of the stapedius muscle in response to these sounds. This contraction helps protect the inner ear from loud noises.
Threshold Determination: The lowest sound intensity level that triggers the stapedial reflex is recorded. This is known as the reflex threshold.
Results and Interpretation
Normal Reflex: A normal stapedial reflex indicates that the auditory and reflex pathways are functioning correctly.
Absent or Abnormal Reflex: An absent or abnormal reflex can suggest issues such as:
Middle Ear Disorders: Fluid, infection, or ossicular chain problems.
Auditory Nerve Damage: Problems with the auditory nerve or central auditory pathways.
Neurological Conditions: Conditions affecting the central nervous system.
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