Laryngeal Mask Airway is an alternative airway device used for
anesthesia and airway support. It consists of an inflatable silicone
mask and rubber connecting tube. It is inserted blindly into the
pharynx, forming a low-pressure seal around the laryngeal inlet
and permitting gentle positive pressure ventilation. All parts
Laryngeal Mask Airway is an appropriate airway choice when mask
ventilation can be used but endotracheal intubation is not necessary.
or abnormal lesions of the oropharynx
not require laryngoscope
Provides airway for spontaneous or controlled ventilation
at lighter anesthetic planes
not fully protect against aspiration in the non-fasted patient
LMA does not allow high positive pressure ventilation
be used as a rescue airway and fiberoptic conduit when intubation
is difficult, hazardous or unsuccessful
can be used for bronchoscopy in the awake or asleep patient
Tips for Success:
Begin with ASA I & II patients
and use standard insertion technique
appropriate size and do NOT overinflate
adequate anesthetic depth
when the patient opens mouth to command
available devices include:
JH, White PF. "The Laryngeal Mask Airway. Its Uses in Anesthesiology."
Anesthesiology 79:144, 1993.
JL. "Laryngeal Mask Airway and the ASA Difficult Airway
Algorithm." Anesthesiology 84:686, 1996.
JR, Brain AIJ. The Laryngeal Mask Airway: A Review and Practical
Guide. WB Saunders, 1997.