While doing Weber test by tuning fork assessment and checking for vibration sense. Which one of the following frequency tuning fork is commonly used for screening of hearing impairment?

Appeared in: NORCET -4 , 2023

Explanation

A 512-Hz tuning fork is the standard instrument recommended for both the Weber and Rinne tests to screen for hearing loss.
This frequency falls within the critical range of human speech, making the test clinically relevant.
It offers an ideal balance, providing a tone that sustains long enough for testing while minimizing the tactile vibration that could confuse the patient.
Using the 512 Hz fork allows for effective differentiation between conductive and sensorineural hearing loss.

Option A: This lower frequency produces significant tactile vibration, which the patient may feel rather than hear, leading to inaccurate test results for hearing.
Option B: This high frequency has a very short tone decay time, meaning the sound fades too quickly to be useful for comparing air and bone conduction or assessing lateralization in a bedside test.
Option D: Similar to 2056 Hz, this frequency is too high, and the sound does not last long enough for a reliable Weber or Rinne test.

Clinical Relevance

Nursing practice connection: Use the key finding related to Tuning Fork Frequency for Hearing Assessment to guide bedside assessment, documentation, and the next nursing action.
Using the correct 512 Hz tuning fork is crucial for accurately differentiating between conductive hearing loss (a problem with sound waves reaching the inner ear) and sensorineural hearing loss (a problem with the inner ear or auditory nerve).
An incorrect diagnosis based on a faulty test (e.g., using a 128 Hz fork) could delay appropriate referral to an audiologist or ENT specialist, impacting patient outcomes.
The Weber test is a quick, non-invasive screening tool that any nurse can perform to gather initial data about a patient's hearing status.

How to Approach the Question

This is a factual recall question about a standard clinical procedure.
First, identify the core of the question: the specific tool (tuning fork), its characteristic (frequency), and the specific test (Weber test for hearing).
Recall the standard frequencies used for different clinical tests. Remember that different frequencies have distinct purposes (e.g., hearing vs. vibration sense).
Evaluate the options. Recognize that 128 Hz is strongly associated with neurological vibration sense testing.
Consider the properties of sound. Higher frequencies tend to decay faster, making them less suitable for tests that require comparison over a few seconds.
This process of elimination points towards 512 Hz as the most logical choice for a hearing test.

Concept Tested & Keywords

QGWgTqxj9TKgvpQlEqfVVQ

E6 Medicine Macleod Clinical Examination 15e p. 206-208

E6 Medicine Harrison 22e Part 1 p. 289-291

Practise the full NORCET -4 , 2023

Attempt every question from this paper in a timed mock, then review the full solution for each one.