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Patulous Eustachian tube is a physical disorder. The exact causes may vary depending on the person and are often unknown. [5] Weight loss is a commonly cited cause of the disorder due to the nature of the Eustachian tube itself and is associated with approximately one-third of reported cases. [6]
Eustachian tube dysfunction can be caused by a number of factors. Some common causes include the flu, allergies, a cold, and sinus infections. [6] In patients with chronic ear disease such as cholesteatoma and chronic discharge, studies showed that they have obstructive pathology at the ear side of the Eustachian tube.
In humans and other tetrapods, both the middle ear and the ear canal are normally filled with air. Unlike the air of the ear canal, however, the air of the middle ear is not in direct contact with the atmosphere outside the body; thus, a pressure difference can develop between the atmospheric pressure of the ear canal and the middle ear.
During ascent internal over-pressure is normally passively released through the eustachian tube, but if this does not happen the volume expansion of middle ear gas will cause outward bulging, stretching and eventual rupture of the eardrum known to divers as reverse ear squeeze. This damage causes local pain and hearing loss. Tympanic rupture ...
The most common causes of PLF are: head or ear traumas, rapid increases of intracranial pressure, congenital abnormalities (in children), complication of stapedectomy, barotraumas (e.g. slap/suction, scuba diving, skydiving, strong and repetitive nose-blowing or sneezing, heavy lifting).
The symptoms of IEDCS are not easily discriminated from symptoms of inner ear barotrauma, and a possible necessity for bilateral myringotomy should be assessed before hyperbaric oxygen therapy is started. In practice, if there is uncertainty about a diagnosis of barotrauma, recompression does not appear to cause harm.
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The main symptoms are severe vertigo and nystagmus. The most common symptom for vestibular neuritis is the onset of vertigo that has formed from an ongoing infection or trauma. [9] The dizziness sensation that is associated with vertigo is thought to be from the inner ear labyrinth. [10]