Objective: To evaluate the effectiveness of balloon dilation (tuboplasty) of the Eustachian tube (BET) in active duty military personnel working in hyper- and hypobaric environments suffering from baro-challenge-induced ETD using functional outcomes. Methods: Military divers and aviators diagnosed with persistent baro-challenge-induced ETD resulting in disqualification from performing flight and dive duties and who elected for treatment with BET were included for analysis. Posttreatment follow-up assessments were undertaken at 1, 6, and 12 months. Outcome measures included successful hyperbaric chamber testing or return to the hyper- or hypobaric environment without significant baro-challenge-induced ETD symptoms and pre- and postdilation Eustachian Tube Dysfunction Questionnaire (ETDQ-7) scores. Results: Mean pretreatment duration of symptoms was 48 months (range: 3-120 months). Following treatment, 92% (12/13) of patients successfully returned to operational duties with resolution of limiting symptoms. Average return to duty time was 8.5 weeks (range: 6-24 weeks). The ETDQ-7 scores improved from a mean of 4.33 (2.57-6.57) predilation to 2.19 (1.00-4.43) postdilation ( Z = 2.73, W = 70, P = .0063). Mean duration of follow-up was 38 weeks (range: 13-70 weeks). Conclusion: Eustachian tube balloon dilation appears to be a safe and highly effective treatment option for baro-challenge-induced ETD in affected military divers and aviators who work in hyper- and hypobaric environments. Further study is needed to determine whether similar results can be achieved in more diverse subject populations and to assess long-term effectiveness.
Traumatic conductive hearing loss (TCHL) is most commonly attributed to tympanic membrane perforations, hemotympanum, or ossicular chain disruption. These complications are generally managed conservatively for up to 6 months with good hearing outcomes. We encountered a case of penetrating facial trauma leading to TCHL because of obstructive Eustachian tube dysfunction (OETD), which is not a previously described etiology for OETD and TCHL. A lysis of scar tissue surrounding the Eustachian tube with balloon dilation was performed in our patient, resulting in resolution of conductive hearing loss. In the absence of traditional signs of TCHL, providers should consider OETD as a potential cause of TCHL. We recommend visualization of the Eustachian tube orifice and balloon dilation if clinically indicated.
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