Draw-over Vaporisers

Examples of draw-over vaporizers include:

New draw-over vaporisers:

Vaporisers designed to be used with compressed gas and continuous flow (known as plenum vaporisers) have a very high internal resistance to gas flow. These should never be used for draw-over anaesthesia as they are too difficult to breathe through.

Epstein, Macintosh, Oxford. Reproduced with permission of Dr Scott Simpson
Oxford Miniature Vaporizer
Diamedica vaporizer. Reproduced with permission of Diamedica
OES vaporizer