![]() Conclusion The eustachian tube, the tympanic cavity, and mastoid work together in a neural controlled feedback system in which various mechanisms concur for middle ear pressure regulation. The hyperoxic environment in hyperbaric oxygen therapy leads to ventilatory dysfunction of the eustachian tube, especially in monoplace chambers, where the patients are pressurized with 100% O2, favoring middle ear barotrauma. Data Synthesis Middle ear barotrauma occurs especially during the compression phase of hyperbaric oxygen therapy. Objective Describe up-to-date information on pathophysiology of middle ear barotrauma after hyperbaric oxygen therapy considering the physiology of pressure variation of the middle ear. Knowledge and understanding of its pathophysiology are crucial for an accurate diagnosis and proper decision making about treatment and prevention. Introduction Middle ear barotrauma is the most common side effect of hyperbaric oxygen therapy. Lima, Marco Antônio Rios Farage, Luciano Cury, Maria Cristina Lancia Bahamad, Fayez Update on Middle Ear Barotrauma after Hyperbaric Oxygen Therapy—Insights on Pathophysiology Copyright© Undersea and Hyperbaric Medical Society. ![]() This ABT device can provide objective feedback reflecting eardrum condition to the patient and the chamber operator during HBO₂ therapy. The analysis revealed significant differences at all points during pressurization (P⟨0.001), but no significant difference after pressure equalization was achieved. A one-way repeated measures analysis of variance contrast test was performed on eardrum admittance before pressurization versus during pressurization, and before pressurization versus after pressure equalization. ![]() After pressure equalization was achieved, eardrum admittance recovered to 95.595% of prepressurization levels. When the pressure increased to above 200 daPa, eardrum admittance decreased to 16.255% of prepressurization levels. Eardrum admittance values were measured according to pressure changes inside a hyperbaric oxygen chamber while the system was fitted to the subject. This study was conducted to test a novel technology that can be used to measure transmembrane pressures, and provide chamber attendants with real-time feedback regarding the patient's equalization status prior to the onset of pain or injury. Accordingly, a tympanometry-based ABT device was designed using eardrum admittance measurements to develop an objective method for preventing MEB, which causes pain and injury, and represents one of the principal reasons for patients to stop treatment. ![]() Decongestant nasal sprays and nasal steroids are used, but their efficacy is questionable to prevent middle ear barotrauma (MEB) during HBO₂ treatment. The middle ear space requires active equalization, and barotrauma of these tissues during HBO₂therapy constitutes the most common treatment-associated injury. In the present study, a tympanometry-based anti- barotrauma (ABT) device was designed using eardrum admittance measurements to develop an objective method of preventing barotrauma that occurs during hyperbaric oxygen (HBO₂) therapy. An anti- barotrauma system for preventing barotrauma during hyperbaric oxygen therapy.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |