Effects of nitrous oxide and oxygen on tracheal tube cuff gas volumes.
نویسنده
چکیده
The changes in the volume of the cuffs of 200 air-inflated tracheal tubes were studied on exposure to 70% nitrous oxide and 30% oxygen. The length of the cuff, its diameter, wall thickness and residual volume were measured. Increases in the volume of gas occurred in all tubes in a time-dependent manner. The tracheal tubes with low-pressure cuffs were more permeable to nitrous oxide and oxygen than those with high-pressure cuffs. Implications of these findings and the factors which govern the transmission rates of gases through cuff material are discussed.
منابع مشابه
Endotracheal tube cuff pressure: need for precise measurement.
CONTEXT High compliance endotracheal tubes cuffs are used to prevent gas leak and also pulmonary aspiration in mechanically ventilated patients. However, the use of the usual cuff inflation volumes may cause tracheal damage. OBJECTIVE We tested the hypothesis that endotracheal tube cuff pressures are routinely high (above 40 cmH2O) in the Post Anesthesia Care Unit (PACU) or Intensive Care Uni...
متن کاملEvaluation of pressure changes in a new design tracheal tube cuff, the Portex Soft Seal, during nitrous oxide anaesthesia.
We have measured pressure changes in a newly designed tracheal tube cuff, the Portex Soft Seal, during nitrous oxide anaesthesia compared with a Mallinckrodt Lo-Contour tube and a Portex Profile tube. The pressure increases in both control groups were significantly greater than those with the new design (P < 0.0001 in each case). The mean increase in pressure in the Mallinckrodt Lo-Contour tube...
متن کاملDiffusion of nitrous oxide through endotracheal tube cuffs
Nitrous oxide (N2O) is an inhalational anesthetic that is frequently used for general anesthesia. While N2O is not sufficient for maintaining general anesthesia if used alone, when used in combination with a volatile inhalation agent, N2O decreases the minimum alveolar concentration (MAC) of the volatile inhalational agent, thereby reducing the amount of the agent required during longer procedu...
متن کاملRediffusion of nitrous oxide prevents increases in endotracheal tube cuff pressure.
An endotracheal tube designed to reduce nitrous oxide-induced intracuff pressure increases (Mallinckrodt Brandt rediffusion tracheal tube) and its relationship to nitrous oxide exposure was studied. Thirty-two subjects undergoing general anesthesia with endotracheal intubation used either a conventional endotracheal tube (Mallinckrodt Intermediate Hi-Lo) or a nitrous oxide rediffusion endotrach...
متن کاملPrevention of nitrous oxide-induced increases in endotracheal tube cuff pressure.
I read with interest the letter by Brandt (1) in the February edition of your journal. I wish to propose an even simpler method of preventing excessive rise in endotracheal tube cuff pressure during the administration of a nitrous oxide anesthetic. If one simply fills the endotracheal tube cuff with the mixture of nitrous oxide and oxygen to be used during anesthesia administration, then there ...
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عنوان ژورنال:
- British journal of anaesthesia
دوره 53 11 شماره
صفحات -
تاریخ انتشار 1981