• Li Li, Jie Feng, Shu Hua Xie, and Li Cheng Geng.
• Department of Anaesthesia, Tianjin Union Medicine Centre, Tianjin, China.
• J. Int. Med. Res. 2014 Jun 1; 42 (3): 693-701.

ObjectiveTo evaluate the efficiency of ventilation using a novel chin-lift mask compared with an oropharyngeal airway (OPA) with EC-clamp technique in obese patients.MethodsObese patients scheduled for cholecystectomy under general anaesthesia were divided into two groups: the OPA group, in which a standard mask and OPA with the EC-clamp technique were used; the CL group, in which the chin-lift mask was used. Respiratory data were compared.ResultsOne hundred patients were recruited and assigned to the OPA (n = 50) and CL (n = 50) groups. Compared with the OPA group, expired tidal volume, peripheral oxygen saturation (SpO2), tidal volume/peak inspiratory pressure ratio and end-tidal carbon dioxide were higher, and the peak and mean inspiratory pressures were lower, in the CL group. In the CL group, no patient had an SpO2 ≤ 95% and the lowest SpO2 was 99%, whereas in the OPA group, 23 patients had an SpO2 ≤ 95% and the lowest SpO2 was 92%. Difficult mask ventilation occurred in eight patients in the OPA group but in none in the CL group.ConclusionThe chin-lift mask provided a patent airway and better quality mask ventilation than an OPA with EC-clamp technique in obese patients.© The Author(s) 2014 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav.

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