A nurse is testing a client for conduction deafness by performing the Weber’s test. Which of the following actions should the nurse take when performing this test?
A.
Place the base of a vibrating tuning fork on the top of the client’s head.
B.
Count how many seconds a client can hear a tuning fork after it has been struck.
C.
Place the base of a vibrating tuning fork on the client’s mastoid process.
D.
Move a vibrating tuning fork in front of the client’s ear canals one after the other.
The correct answer and Explanation is :
The correct answer is A. Place the base of a vibrating tuning fork on the top of the client’s head.
Explanation
Weber’s test is a simple and quick bedside test used to evaluate hearing loss and differentiate between conductive and sensorineural hearing loss. The test involves a vibrating tuning fork, which is typically a 512 Hz fork, placed on the midline of the patient’s forehead or on the top of the head.
- Mechanism: When the tuning fork vibrates, it generates sound waves that travel through the bones of the skull. Because the fork is placed in the midline, the sound should ideally be perceived equally in both ears if the hearing is normal.
- Interpreting Results:
- Conductive Hearing Loss: If a patient has conductive hearing loss (e.g., due to earwax blockage, otitis media), they will hear the sound louder in the affected ear. This occurs because the sound vibrations are better transmitted through bone than through air.
- Sensorineural Hearing Loss: Conversely, if there is sensorineural hearing loss (e.g., due to damage to the cochlea or auditory nerve), the sound will lateralize to the better hearing ear.
- Incorrect Options:
- B: Counting seconds is not part of Weber’s test. This method is more associated with Rinne’s test, which compares air and bone conduction.
- C: Placing the tuning fork on the mastoid process is part of Rinne’s test, which assesses bone conduction.
- D: Moving a tuning fork in front of the ear canals pertains to testing air conduction and is not part of Weber’s test.
In summary, placing the tuning fork on the top of the client’s head (option A) is the appropriate action to perform Weber’s test, providing crucial information about the type of hearing loss the client may be experiencing.