StandardsSimple and Safe
General Safety Features
The prime concern for safe use of the Humphrey ADE system has resulted in a design which includes all the following qualities.
- A single versatile system for adults and children - no need to change systems from one patient to the next.
- Simple to use in both semi-closed or circle modes - same basic controls but offering the choice of both techniques.
- Efficient is all modes of use - gas & vapour usage kept to minimum at all times.
- Instantly switchable between modes - avoids risks associated with changeover of equipment and is always ready for use in any mode.
- Pressure-limiting device always in circuit - potentially dangerous excess pressure is released when limit is exceeded.
- Innovative paediatric exhaust valve - gives "peep" to prevent lung collapse but without compromising ease of breathing.
- Visual function of exhaust valve - a useful signal that alerts the anaesthetist to any problems.
- Single size 15mm smoth bore tubing for adults and children - no change for different size of patients and less resistance than conventional tubing. Easy to clean.
- Effective pollution control - exhaust valve at the main ADE body allows easy scavenging even in paediatrics.
- Simple and robust construction - designed to survive constant use. Easy to service even in remote environments.
- Suitable for consultant or non-specialist anaesthetists - safe for all users in both developed and developing countries.
Equipment Safety
Safety is incorporated into the equipment with or without the soda lime canister by special features listed below:
- Visible exhaust valve function - see below for further comment
- Pressure-limiting device - 60 cms H20 - always in line
- Engraved instructions - on main body of ADE unit
- Easy scavenging - always at the exhaust valve even for children
- Secure attachment - a lock nut made to ISO or Penlon standards secures the system to the anaesthetic machine thus preventing accidental dropping. A clamp kit is also available.
- Airway pressure monitoring port on expiratory limb.
The new ADE valve incorporates a unique design that allows the anaesthetist to see its function. When open during expiration, an extended valve-seat stem lifts into a recess on the top of the valve. With each breath the reflected orange stem is easily seen as a flashing image. Valve function can be checked at any time by squeezing the reservoir bag. For temporary ventilation by hand without having to screw down the valve, the reservoir bag is squeezed during inspiration while at the same time depressing the exposed valve stem to close the valve.