This has been developed as an alternative breathing system to the modified Ayres T-piece and has the advantage of much lower fresh gas flow rates compared with the Ayres T-Piece. The expiratory valve should be fully open at all times and is located at the anaesthetic machine, eliminating the common risk of ‘bag twist’ and occlusion that can occur with the Ayres T-piece.

• Reduced mechanical dead space
• Expiratory APL valve with pressure relief
• Fresh gas flow rate:

- 2 - 5kg 1L/min (minimum if capnography unavailable)
- 6 - 10kg 200ml/kg/min (minimum to prevent rebreathing of CO2) 

• Patient weight: 2 – 10kg
• 500ml reservoir bag (15mm neck) included
• 1L reservoir bag can be purchased separately (01-1891) 
• Reservoir bags should be selected based on the individual patient and the calculated tidal volume