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Middle Ear Pressure Changes during Balloon Eustachian Tuboplasty
Matthew E Smith1,2, James R Tysome2
11 University of Cambridge, Cambridge, UK.
Summary
Balloon eustachian tuboplasty (BET) in cadavers shows middle ear pressures remain within physiologic limits. Routine myringotomy before BET is likely unnecessary for adults, simplifying the procedure.
Area of Science:
- Otolaryngology
- Surgical Innovation
- Anatomy and Physiology
Background:
- Balloon eustachian tuboplasty (BET) is a treatment for eustachian tube dysfunction.
- Surgeons may perform myringotomy before BET due to concerns about middle ear (ME) pressure changes and potential otic barotrauma.
Purpose of the Study:
- To investigate middle ear pressure changes during BET in human cadavers.
- To determine if myringotomy is necessary before BET to prevent barotrauma.
Main Methods:
- Human cadaver investigation of BET using the Bielefeld balloon catheter.
- Recording of ME pressures during catheter insertion, inflation, deflation, and removal.
- Assessment of residual pressures 15 seconds after each stage.
Main Results:
- BET induced positive ME pressures during insertion (max 26 daPa) and inflation (max 99 daPa).
- Negative pressures were observed during deflation (max -46 daPa) and removal (max -42 daPa).
- Observed ME pressures were within the normal physiologic range for adults.
Conclusions:
- BET in adult cadavers generates ME pressures within normal physiologic limits.
- Routine myringotomy prior to BET in adults is not indicated based on these findings.
- This study suggests a potential simplification of the BET procedure.
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