Spontaneous rupture of the tympanic membrane during anaesthesia

Abstract

A case of spontaneous rupture of the tympanic membrane during anaesthesia is reported and its possible aetiology discussed.

Evaluation of tympanometric alterations in patients subject to general anesthesia with nitrous oxide

“…Given that nitrous oxide is potentially harmful to the hearing of susceptible subjects, specific issues such as previous otological surgery or ear-related symptom have to be investigated before the surgery 9. , 25.…”

Avaliação de alterações timpanométricas em pacientes submetidos à anestesia geral com óxido nitroso

“…Given that nitrous oxide is potentially harmful to the hearing of susceptible subjects, specific issues such as previous otological surgery or ear-related symptom have to be investigated before the surgery 9,25,26 . Previous history of ME surgery increases the risk of complications, in addition to the fact that absence of preoperative symptoms does not eliminate the risks of TM damage 2,9 .…”

“…Previous history of ME surgery increases the risk of complications, in addition to the fact that absence of preoperative symptoms does not eliminate the risks of TM damage 2,9 .…”

“…This fact occurs because when it is administered to a patient breathing room temperature air it is switched to nitrogen 4 . However, protoxide input speed is 34 times faster than the output of nitrogen in the body [5][6][7][8][9] . Owing to this imbalance, there is increase in pressure of little complacent cavities, such as the middle ear, in addition to increase in volume of complacent cavities, such as intestinal loop, pulmonary or renal cysts, up to the point that balance is restored [10][11][12] .…”