For example, an oxygen flow of 12 l/minute through an Ohmeda Modulus II achieves an undetectable level of halothane after just six minutes (2), but newer generation machines take much longer to reach safe levels of volatile agent after flushing (3-6).

Because almost every maneuver to get the baby out will be so much easier with some uterine relaxation, I recommend giving the patient a couple of whiffs of halothane, or nitroglycerine, or another relaxing agent.

"Intra-operatively, patients receive oxygen, N2O, halothane and fentanyl, are hand-ventilated and monitored with just a pulse oximeter and our trained eyes.

The volatile liquids include desflurane (Suprane), enflurane (Ethrane), halothane (Fluothane), isoflurane (Forane), methoxyflurane (Penthrane), and sevoflurane (Ultane).

After intubating the trachea, halothane in oxygen was used to maintain anaesthesia.

TABLE 1 Triggering and nontriggering anesthetic agents Triggering agents Nontriggering agents Succinylcholine (most common) Barbiturates Desflurane Benzodiazepines Halothane Ketamine Isoflurane Local anesthetics Sevoflurane Nitrous oxide Nondepolarizing muscle relaxants Opioids Propofol Adapted from: Barash PG, et al, eds.

Briefly, rats were anesthetized and maintained with a gas mixture of 98.5% air and 1.5% halothane. Right common carotid artery (ECA) was exposed through a median incision in the neck, and a 4-0 nylon suture was inserted from the ECA to the right internal carotid artery to occlude the origin of the right middle cerebral artery.

And in the final chapter, she carries the story to the present, outlining the discoveries and impact of new drugs such as halothane and the increasing importance of anesthetists in modern medicine.

Surgery requiring more than local infiltration or a block is done in the general theatre, where cases are clone under halothane or isoflurane, with propofot and fentanyl, while under Sp[O.sub.2] and manual blood pressure monitoring.

Two available inhaled anesthetics are halothane and sevoflurane.