Laryngeal Mask Ambu Aura Once vs. Supreme in Children

Ventilation With Laryngeal Mask Ambu Aura Once vs. Supreme in Children

The purpose of this study is determine safety and efficiency of mechanical ventilation in children with two different types of single use laryngeal masks (Ambu AuraOnce vs. LMA Supreme). The main interest is leakage pressure of oropharynx and stomach. The null hypothesis is that leakage pressures of Ambu AuraOnce and LMA Supreme are equivalent. The alternative hypothesis is that there is a difference in leakage pressure.

Before starting surgery patients will be anesthetised and airway managed either with LMA Ambu AuraOnce or Supreme. Ventilation parameters, stomach inflation, and hemodynamic parameters will be measured.

Inclusion Criteria:

• Children aged 1-10 years
• ASA I - III
• Elective procedure in general anaesthesia
• Parental informed consent

Exclusion Criteria:

• Non fasting patient
• Body mass index > 35 kg/m2
• Cervical spine pathologies or peripheral neurologic deficiences
• Malformations of upper airway or head
• Anamnestic hiatus hernia or esophageal reflux
• Status post operation of stomach or esophagus
• Recurrent respiratory infection or obstructive airway disease
• Non elective procedure