Characteristics of tympanogram in symptomatic Eustachian tube dysfunction

Area of Science:

• Otolaryngology
• Audiology
• Medical Diagnostics

Background:

• Symptomatic Eustachian tube dysfunction (SETD) can present with normal tympanograms.
• Identifying specific tympanometric characteristics in SETD is crucial for effective treatment selection.

Purpose of the Study:

• To characterize tympanograms in patients with symptomatic Eustachian tube dysfunction (SETD).
• To investigate the diagnostic value of tympanometric peak pressure (TPP) shifts in SETD.
• To assess the response to balloon dilation of the Eustachian tube (BDET) in SETD patients.

Main Methods:

• 124 SETD patients with type A tympanograms underwent balloon dilation of the Eustachian tube (BDET).
• Patients were grouped into effective and ineffective BDET response groups.
• TPP shifts, measured via Valsalva and Toynbee maneuvers, were analyzed pre- and postoperatively.
• Controls included unaffected ears and patients with sudden sensorineural hearing loss (SSHL) and Meniere's disease (MD).

Main Results:

• No significant difference in tympanometric peak pressure (TPP) was found between SETD, SSHL, MD, and healthy ears.
• TPP shifts were significantly reduced in affected SETD ears compared to unaffected ears at baseline.
• Following BDET, TPP shifts in SETD ears increased significantly, approaching levels seen in healthy ears.

Conclusions:

• A subset of SETD patients with type A tympanograms exhibit decreased TPP shifts.
• Reduced TPP shifts may indicate a favorable response to balloon dilation of the Eustachian tube (BDET).
• TPP shifts are a valuable indicator for identifying SETD patients who may benefit from BDET.