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Anaesthetic vaporizer - Patent 4607634 (1560 words) |
 | The present invention relates to anaesthetic vaporisers which are devices for mixing the vapour of a volatile liquid anaesthetic agent with a carrier gas (which term is to be understood to include gas mixtures), for subsequent administration to a patient. |
| Anaesthetic vaporisers are known in which the carrier gas supplied to the vaporiser is divided into two streams. |
| It is an aim of the present invention to provide an anaesthetic vaporiser of the "by-pass" type having a valve arrangement which is simple and economic to manufacture and which is capable of being used in field or emergency applications when skilled personnel may not be present. |
| Reference.com/Encyclopedia/Anaesthetic vaporiser (1289 words) |
| An anaesthetic vaporiser is a device generally attached to an anaesthetic machine which delivers a given concentration of a volatile anaesthetic agent. |
| By the 1980s, the anaesthetic vaporiser had evolved considerably; subsequent modifications lead to a raft of additional safety features such as temperature compensation, a bimetallic strip, temperature-adjusted splitting ratio and anti-spill measures. |
| The internal resistance of the vaporiser is usually high, but because the supply pressure is constant the vaporiser can be accurately calibrated to deliver a precise concentration of volatile anaesthetic vapour over a wide range of fresh gas flows. |
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