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[Vaporizer malfunction--a cause of high concentration halothane vapor delivery].
Masui
March 1994
Department of Anesthesiology, Keio University School of Medicine, Tokyo.
Excessively high concentration of halothane vapor was delivered to the inspiratory gas mixture due to the vaporizer malfunction (Fluotec 4). After disassembling the vaporizer, corrosion was observed on the internal components. This was considered as the reason for the high halothane output.
View Article and Find Full Text PDF[Hypoventilation due to disconnection of the vaporizer and negative-pressure leak test to find disconnection].
Masui
August 1992
Department of Anesthesia, Iwamizawa Municipal General Hospital.
Most of Ohmeda anesthesia machines have a outlet check valve located in the low-pressure circuit, and this influences the type of leak test greatly. We report a case of hypoventilation due to a gas leakage from the junction of two vaporizers, Fluotec 3 and Enfluratec of Ohio 30/70. This gas leakage was not discovered preoperatively by performing traditional leak test of squeezing the bag filled with oxygen.
View Article and Find Full Text PDFWe reviewed the maintenance records of Tec vaporizers which had been in clinical use for up to 4 years. Tec 4s and Enfluratec 3s were found to be extremely reliable, but Fluotec 3s suffered progressively from mechanical and calibration problems. Their most recurrent fault was sticking valves caused probably by thymol crystallizing on the valve faces.
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