A Multicenter Study of the Ambu?? Laryngeal Mask in Nonparalyzed, Anesthetized Patients

Abstract

We designed this multicenter trial to evaluate the performance and safety of the Ambu laryngeal mask, a new disposable supraglottic airway device, in patients scheduled for elective surgery. One-hundred-eighteen nonparalyzed, anesthetized patients (ASA physical status I-II, age, 18-65 yr, body mass index, 18-30 kg/m(-2)) receiving total IV anesthesia were included in this study. After device insertion, fiberoptic position and oropharyngeal leak pressure were determined at an intracuff pressure of 60 cm H2O. Ease of ventilation was determined by controlling ventilation at 6 mL/kg tidal volume. Any complications were noted and recorded. Device placement was successful in all patients on the first or second attempt (92.4% or 7.6%, respectively) with an insertion time (removal of face mask until first tidal volume) of 44.9 +/- 37.91 s. Adequate ventilation was achieved in all patients and the vocal cords could be visualized by fiberoptic endoscopy in 91.5% of patients. Oropharyngeal leak pressures were 24.1 +/- 5.44 cm H2O. Blood was detected on the device in 8.5% of patients. Complications and patient complaints were minor and quickly resolved. The Ambu laryngeal mask is easy and quick to insert and provides a safe and efficient seal during positive pressure ventilation in nonparalyzed patients scheduled for elective surgery.

I-Gel(tm) vs. Auraonce(tm) Laryngeal Mask for General Anaesthesia With Controlled Ventilation in Paralyzed Patients

“…The i-gel TM was found to be the easiest of several SADs to insert in one manikin-based study 17 . Time taken to insert the AuraOnce TM was shorter in our study than in previous studies 5,6,10 and comparable to the results of another 12 which may be explained by a greater experience of all our operators with insertion of the AuraOnce TM device. Three patients required endotracheal intubation.…”

“…Total success rate for AuraOnce TM insertion was 94.2% which corresponds with the results of other studies where overall success rate found was between 94% and 100% (ref. [4][5][6][10][11][12] ). First time success rates for the i-gel TM found in our study was 85.6% which is lower than the results published in recent cohorts.…”

“…It also has no grilles. The AuraOnce TM device has also been tested under conditions of both spontaneous 4 and controlled ventilation 5,6 . We designed a study to compare the i-gel TM with the AuraOnce TM under conditions of controlled ventilation.…”

A comparison of the disposable Ambu® AuraOnce™ Laryngeal Mask with the reusable LMA Classic™ laryngeal mask airway*

“…The manufacturer claims that this allows improved conformation to the shape of the airway. A multicentre study involving 118 patients demonstrated that the Ambu Laryngeal Mask is easy and quick to insert, providing a safe and efficient seal during positive pressure ventilation in non-paralysed patients undergoing elective surgery [9]. However, the study was limited by being non-comparative in design.…”

Comparative Study of Orotracheal Intubation through Air Q Laryngeal Mask Airway: Blind Versus Fiberoptic Guided During General Anesthesia

“…The classical laryngeal mask airway (LMA), is a supraglottic airway device which simplified airway management [4]. The intubating laryngeal mask airway (The LMA-Fastrach™) was designed to facilitate intubationwhich can be done either blindly or via fibreoptic assistance [5].…”