Surgeons go green—recycling general anaesthetic

One of the paradoxes of the medical marvel known as general anaesthesia is that in helping us to get well, those anaesthetic gases are also heating our planet. Now, a remedy may be at hand in the form of an innocuous-looking ...

Nitrous oxide from urine patches in pastures

Commonly known as 'laughing gas' and currently used both in anaesthetics and as a 'legal high', nitrous oxide (N2O) is a powerful greenhouse gas produced in the soil by micro-organisms, especially so on land grazed by animals.

Anesthetic gases heat climate as much as 1 million cars

When doctors want their patients asleep during surgery they gently turn the gas tap. But Anaesthetic gasses have a global warming potential as high as a refrigerant that is on its way to being banned in the EU. Yet there ...

77 percent of European pigs are castrated without anesthetic

The castration of pigs prevents the "boar taint" smell in the meat and allows them to contain more fat. However in practice this can be very different. Now, for the first time, a scientific team has collected information ...

Breeding their horns off -- a winner

A team of scientists led by CSIRO's Dr Kishore Prayaga has been awarded a prestigious Australian Museum Eureka Prize for its work to develop a simple genetic test which has the potential to end the need to dehorn cattle in ...

Anesthetic

An anesthetic (or anaesthetic, see spelling differences) is a drug that causes anesthesia—reversible loss of sensation. They contrast with analgesics (painkillers), which relieve pain without eliminating sensation. These drugs are generally administered to facilitate surgery. A wide variety of drugs are used in modern anesthetic practice. Many are rarely used outside of anesthesia, although others are used commonly by all disciplines. Anesthetics are categorized into two classes: general anesthetics, which cause a reversible loss of consciousness, and local anesthetics, which cause a reversible loss of sensation for a limited region of the body while maintaining consciousness. Combinations of anesthetics are sometimes used for their synergistic and additive therapeutic effects. Adverse effects, however, may also be increased.

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