AUDIOMETRY (059 Flashcards
points of particular importance in Clinical History of AUDIOMETRY?
➢ Time and age of onset of hearing loss
➢ Illness, accident or other unusual circumstances at onset
➢ Concurrent symptoms: vestibular disturbances, pain or ‘fullness in ear’, headache, neurological disturbance, infection of ear or respiratory tract, tinnitus
Personal history questions for AUDIOMETRY?
• Acute infectious diseases
• Aural(Ear) infections
• Respiratory infections
• Noise exposure – Industrial (e.g. factory machine noise, road drills)
• Rock ‘n’ Roll (e.g. musicians etc.)
Drugs history questions for AUDIOMETRY?
Neomycin, Gentamycin & Streptomycin (Ototoxic drugs)
What are Ototoxic drugs?
Certain medications can damage the ear, resulting in hearing loss, ringing in the ear, or balance disorders. These drugs are considered ototoxic. There are more than 200 known ototoxic medications
Other Clinical History questions for AUDIOMETRY?
➢ Trauma to the head
➢ Family history
➢ Conditions in which disability is apparent, e.g. talking in groups, background noise
A test that is used to classify unilateral hearing loss?
Weber’s Test
How to conduct Weber’s Test?
This test is used to classify unilateral hearing loss.
The stem of a vibrating tuning fork is held at the midline of the skull and the tone is best heard in the affected ear in conductive loss, and in the non-affected ear in sensory-neural loss.
How to conduct Rinne’s Test?
➢ The tone of a tuning fork is alternately presented by air conduction 1 cm from the pinna and by bone conduction with the stem of the fork pressed firmly against the skull behind the ear (on the mastoid bone). The opposite ear should be masked.
➢ In normal (POSITIVE RINNE) response, air conduction is heard approximately twice as long as is bone conduction
➢ In an abnormal (NEGATIVE RINNE), bone conduction is heard longer than air conduction. Responses may be of any degree, as decreased positive or equal
Explain procedures of Pure Tone Audiometry (5 points)
How are Air conduction threshold measured?
Procedure of Bone conduction threshold measurement?
What is the Masking test?
➢ This test is carried out when there is unilateral hearing loss / asymmetrical loss
➢ The better ear cochlea is engaged with noise signal, to find out the exact hearing thresholds of the worse ear
What is Speech Testing?
➢ Using a variety of speech stimuli to assess hearing sensitivity of a person for discriminating & understanding speech
➢ Provides information on auditory receptive communication ability
