Made to ISO &
CE Standard Mark Standards

THE HUMPHREY ADE-CIRCLE system
and "Free-Ox" Anaesthetic Machine
LOW-FLOW and free oxygen anaesthesia

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ADE-Circle QA Standards

CE mark quality assurance

CE Mark Logo

The ADE-circle system is manufactured to comply with all CE standards

Design technical standards

The Humphrey ADE-circle system conforms to British/European & ISO standards for 22mm & 15mm and weight-bearing connectors:- EN1281 & 2 incorporating BS 3849 parts 1 & 2 and ISO parts 1 & 2.

1985 Design Institute - Shell Design Award

Shell Design Award: In 1985 the Humphrey ADE-circle system was awarded the prestigious Shell Design Award for excellence in design. The system remains essentially the same design today, but with several major improvements such as a new exhaust valve of especial benefit to children and small animals, plus a soda-lime recycling canister.

The Humphrey ADE-circle system also gained an Engineering Design Award in October 1999

Continuing research

Dr David Humphrey

Dr David Humphrey, who trained in London and is a well known research anaesthetist. He has won two research awards for his work on the ADE system, one being from the Royal Society of Medicine, London. He is currently involved in research with sevoflurane in low-flow techniques, particularly in veterinary applications.

If you would like to invite him to lecture on "Safe, simple low flow anaesthesia" or contact him about any issue connected with the ADE-circle system or on low flow techniques, please see "Continuing Professional Development" on Home page.