Size compatibility of airway equipment in children, ETT and LMA
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Objectives
Information to help locate assemble & use airway equipment for difficult intubations.
Scope
These documents are procedural guidance
Audience
Anaesthetists and anaesthetic assistants experienced in the management of difficult airways in theatre.
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LMA Size Size 1 Size 1 ½ Size 2 Size 2 ½ Size 3 |
ETT Maximum Size 3.0mm (ID) uncuffed 3.5mm (ID) uncuffed 4.5mm (ID) uncuffed 5.0mm (ID) uncuffed 6.0mm (ID) uncuffed OR 5.5mm (ID) cuffed |
- Pilot balloon of cuffed endotracheal tubes will not pass through LMA less than size 3
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Portex™ Intubating Stylets |
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Size Small Medium Large |
External Diameter 2.0mm 4.0mm 5.0mm |
ETT Compatible Size range 2.5mm – 4.5mm (ID) 5.0mm – 8.0mm (ID) 8.5mm – 11.0mm (ID) |
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Portex™ Tracheal Tube Guide (Bougie) |
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Size 5 FR 10 FR 15 FR |
External Diameter 1.7mm 3.3mm 5.0mm |
ETT Compatible Size range 2.0mm (ID) 3.5mm (ID) 5.5mm (ID) |
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Cook™ Airway Exchange Catheters |
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8 FR 11 FR 14 FR
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3.0 ETT and larger 4.0 ETT and larger 5.0 ETT and larger
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Anaesthetic Fibrescope Olympus™ 2.2mm Storz™ 2.8 mm Storz™ 4.0 mm Olympus™ 4.1 mm |
ETT Minimum size 2.5mm (ID) 3.0mm (ID) 4.5mm (ID) 4.5mm (ID) |
Last reviewed: 03 April 2017
Next review: 06 April 2019
Author(s): Dr Neal Willis, Paediatric Anaesthetist RHC
Reviewer Name(s): Dr Alyson Walker Paediatric Anaesthetist RHC