Eustachian Tube Function in Adults with Ventilation Tubes Inserted for Otitis Media with Effusion

Area of Science:

• Otolaryngology
• Medical Engineering
• Physiology

Background:

• Chronic otitis media with effusion (COME) often necessitates ventilation tube (VT) insertion.
• Eustachian tube dysfunction (ETD) is a common underlying factor in COME.
• Understanding eustachian tube function (ETF) in patients with VTs is crucial for effective management.

Purpose of the Study:

• To investigate eustachian tube function (ETF) in adults treated with ventilation tubes (VT) for chronic otitis media with effusion (COME).
• To assess both passive and active components of ETF in this patient cohort.
• To identify potential limitations in current management strategies for ETD.

Main Methods:

• Enrolled 17 adult subjects with at least one VT.
• Collected detailed patient history and assessed risk factors via questionnaires.
• Performed nasopharyngeal video endoscopy and eustachian tube function tests, including the forced response test (FRT) and inflation-deflation test (IDT), alongside various nasopharyngeal maneuvers.

Main Results:

• Subjects exhibited significantly high opening pressures (580±333 daPa) and low closing pressures (138±192 daPa) during FRT.
• Most participants showed minimal or weak active ETF during FRT and IDT.
• Nasopharyngeal maneuvers did not significantly alter middle-ear pressures, indicating severe obstructive ETD.

Conclusions:

• Adults with VTs for COME commonly present with abnormal ETF, characterized by impaired passive opening and weak active muscular function.
• Management strategies focusing solely on passive ETF properties may be insufficient for resolving ETD.
• Further research into treatments that address both passive and active ETF components is warranted.