title: Optimal Size AMBU® Laryngeal Mask Airway Among Asian Adult Population.
abstract: OBJECTIVE
  This was a randomized single blinded study to determine optimal size for Ambu®LMA (ALMA) among Malaysian adult population.
  
  
  METHODS
  One hundred and twenty six non-paralyzed anaesthetized adult patients were block randomized into size 3, 4 and 5 Ambu®LMA. Optimal size is defined primarily by oropharyngeal pressure (OLP). Pharyngeal injury and ease of insertion are also taken into consideration.
  
  
  RESULTS
  Mean OLP was significantly higher for Size 4 and 5 compared to size 3 (p<0.001) but similar between size 4 and 5. Number of insertion attempts and insertion time were similar between sizes. Size 5 required more manipulations during insertion (p<0.005) and had higher pharyngeal injury (p=0.001) compared to size 3 and 4.
  
  
  CONCLUSIONS
  We recommend size 4 ALMA as the optimal size for Malaysian adults in view of the higher OLP compared to size 3, yet less pharyngeal injury than size 5 in spontaneously breathing patients.
authors.affiliation: University Malaysia Sarawak, Faculty of Medicine and Health Sciences, Department of Surgery, Jalan Tun Ahmad Zaidi Adruce, 93150 Kuching, Malaysia. ingptang@yahoo.com.
authors.forename: M Y
authors.initials: MY
authors.lastname: Tang
authors.affiliation: University Malaysia Sarawak, Faculty of Medicine and Health Sciences, Department of Surgery, Jalan Tun Ahmad Zaidi Adruce, 93150 Kuching, Malaysia.
authors.forename: I P
authors.initials: IP
authors.lastname: Tang
authors.affiliation: University of Malaya, Faculty of Medicine, Department of Anaesthesiology, 50603 Kuala Lumpur, Malaysia.
authors.forename: C Y
authors.initials: CY
authors.lastname: Wang