Possible ill heath effects from long term exposure require scavenging of N 2 O from surgery. Rarely used to control blood pH or to stimulate breathing. Lowered resistance to turbulent, but not laminar, flow can help with narrowed turbulent tubes. Also high specific heat for cooling of laser surgery. Gas blending and vaporisation systems Pressure reducing valves.
Flush valve allows high flow of oxygen to flush system.
Flowmeters to monitor and control gas flows. Vaporisers pass a controlled fraction of the gas flow over either liquid or wicked volatile anaesthetic. Yellow is body of vaporiser. Orange is moving parts. Blue is gas without anaesthetic.