A high SVP will require a smaller proportion of the total gas flowing through the vaporiser to pass through the vaporising chamber to produce a given concentration than a low SVP.
There are two ways the amount of Desflurane is controlled and injected into the FGF:
1. The dial on the top controlled by the anaesthetist - setting the desired conc %
There is no fresh gas flow into the heating chamber itself - this is unlike a pass-over model.
- Needs electricity and time to warm up before it can be used.
Dr. David Lyness@Gas_Craic
If the desflurane temperature were to decrease, the vaporizer would fail to deliver accurate concentrations. Solenoid operated locks in the vaporizer dial and at the vaporizing chamber outflow are only released once the operating temperature is reached.
www.wotol.com - Draeger Image
- Desflurane is presented as a liquid anaesthetic in a blue-bottle with a valve-like cap for filling.
- As an agent, it has a low blood gas partition co-efficient which means it has rapid onset and offset.