what type of gas is used for anesthesia
General anaesthetic Many compounds have been used for inhalation anaesthesia, but only a few are still in widespread use. Desflurane, isoflurane and sevoflurane are the most widely used volatile anaesthetics today. They are often combined with nitrous oxide. Older, less popular, volatile anaesthetics, include halothane, enflurane, and methoxyflurane. Researchers are also actively exploring the use of xenon as an anaesthetic.[5]
Bunsen burner The gas can be natural gas (which is mainly methane) or a liquefied petroleum gas, such as propane, butane, or a mixture of both.
Eye injuries during general anaesthesia Methods to prevent intraoperative corneal injuries include
Twilight anesthesia The same drugs used in general anesthesia are also used for twilight anesthesia, except in smaller doses and in a bolus interval (A concentrated mass of a substance administered intravenously for diagnostic or therapeutic purposes). These drugs can be administered via gases, such as nitrous oxide (laughing gas), or intravenously, with drugs such as ketamine (pediatrics primarily, and infrequently in adults), propofol, and midazolam.[3] Twilight anesthesia alone is not used to provide relief from surgical pain, therefore, it is always given in conjunction with a local or regional anesthetic. Additionally, IV sedation is frequently administered as a concoction of several agents including those previously mentioned for induction and maintenance of anesthesia, as well as a benzodiazepine (usually midazolam, but temazepam or flunitrazepam are also used via the oral route[4]) and a narcotic/systemic analgesic such as demerol or fentanyl. As discussed in the levels of sedation by anesthesia, assistance with breathing tubes (ETT or LMA) are not generally used for this type of anesthesia.