Increase in Halothane Concentration following Refilling of Certain Vaporizers.

A clinical and laboratory evaluation of four fluothane vaporizers.

WIDESPREAD CONTINUING INTEREST in 2 brom, 2 chlor 1, 1, 1, fluoroethane, known as halothane or more commonly Fluothane, has resulted over the past few months in many attempts to make its use sas and at the same time more economical. Certain apparatus has been designed to facilitate its use, particularly by the less experienced anaesthetist. This paper describes the clinical and laboratory inves...

The action of the halothane-diethyl ether azeotropic mixture on experimental animals.

MANY mixtures of volatile anaesthetics have been -used in the past with some success, but they are difficult to handle in the modern anaesthetic apparatus. Because of the differences in the boiling points of the components of these mixtures, they volatilize at different rates and therefore it is almost impossible to know their concentration in the anaesthetic mixture administered to the patient...

Accuracy of halothane vaporizers in clinical use.

Flow reversal through a Mark III halothane vaporizer.

A fault in the assembly of a Matrix Large Animal Circle anaesthetic machine resulted in reversal of fresh gas flow through the vaporizer. The fault was discovered only after the sudden development of excessive depth of anaesthesia in two equine patients. Laboratory investigations were conducted to determine the effect of flow reversal on vaporizer output. Results indicated that output concentra...

Anesthesia-related cardiac arrest in children.

To the Editor:—Morray et al. are to be congratulated in trying to sort out some of the issues regarding intraoperative cardiac arrest in children. However, I am concerned with the conclusions regarding cardiac arrests related to anesthetic agents. The authors freely admit that they do not know the numerator or denominator and therefore cannot say that sevoflurane is safer than halothane, but th...