Poorly functioning scavenging system

20 (28.2%)

Use of paediatric Ayres T-Piece

20 (28.2%)

Leakage from breathing circuit

17 (24.0%)

Leakage from anaesthetic machine

15 (21.1%)

Lack of scavenging system

13 (18.3%)

Improper fitting facemask

7 (9.8%)

High flow anaesthesia

1 (1.4%)