How should the Rinne test be interpreted (positive vs negative) and what are the next steps based on the result?

Rinne Test Interpretation

A Rinne test is positive (normal) when air conduction is better than bone conduction, and negative (abnormal) when bone conduction is better than air conduction—indicating conductive hearing loss in that ear 1.

How to Perform the Test

Use a 256 or 512 Hz tuning fork (strike it on your covered elbow or knee, not on hard surfaces):

1. Place the vibrating fork on the mastoid bone
2. When the patient can no longer hear it, immediately move it to the ear canal entrance (tines directed toward the ear, not touching)
3. Ask if they can still hear the sound 1

Interpretation Algorithm

Normal/Positive Rinne:

• Air conduction > bone conduction (AC > BC)
• Sound heard better at the ear canal entrance
• Indicates either normal hearing OR sensorineural hearing loss (SNHL) 1

Abnormal/Negative Rinne:

• Bone conduction > air conduction (BC > AC)
• Sound heard better on the mastoid
• Indicates conductive hearing loss (CHL) in that ear 1

Critical caveat: The Rinne test has poor sensitivity for mild conductive losses. It typically only becomes negative when the air-bone gap exceeds 15-25 dB 2, 3. For gaps of 10-35 dB, only 27% of ears show a negative Rinne 4. This means you can miss significant conductive pathology with a falsely reassuring positive Rinne.

Tuning Fork Frequency Matters

Use 512 Hz as the standard 1, 5. While 256 Hz is more sensitive for detecting conductive loss, it has more false-positives due to vibrotactile responses 5. The 512 Hz fork provides the best balance of sensitivity and specificity 5.

Next Steps Based on Results

If Rinne is Negative (CHL suspected):

• Perform otoscopic examination to identify cerumen impaction, middle ear effusion, or tympanic membrane abnormalities 1
• Obtain formal audiometry to quantify the air-bone gap 1
• Treat reversible causes (cerumen removal, manage effusion)

If Rinne is Positive but hearing loss present:

• Combine with Weber test results to distinguish SNHL from normal hearing 1
• If Weber lateralizes to the opposite ear, suspect SNHL in the test ear 1
• Obtain urgent audiometry, especially if sudden onset (within 72 hours) 1
• Consider urgent ENT referral for sudden SNHL

Critical pitfall: A positive Rinne does NOT rule out conductive hearing loss—it only suggests the air-bone gap is likely less than 15-20 dB 2, 3. Always obtain formal audiometry when clinical suspicion for hearing loss exists, regardless of tuning fork results 1.

Technical Precision Points

• Hold the tuning fork at 0° or 180° relative to the ear canal—other angles can decrease amplitude by 10-35 dB and falsely alter results 6
• The test cannot reliably detect conductive losses with air-bone gaps less than 25-40 dB depending on frequency used 7
• Tuning fork tests are screening tools only and never replace audiometry 1