The following are “definitive” airway except: (DNB June 2009)
|C||Laryngeal mask airway|
Laryngeal mask airway.
(Ref. Clinical Surgery by Alfred Cuschieri- Page 37)
Under direction a laryngeal mask is easily positioned and is kept in place by inflation of the cuff. Despite this cuff, a laryngeal mask is not a definitive airway because it does not protect the patient from aspiration.
Laryngeal mask airwayThe laryngeal mask airway (LMA) is a modified ETT with an inflatable, ... Though these devices are relatively easy to use, they do not provide a definitive airway since the supraglottic cuff does not prevent from aspiration.
Principles of Airway Management by Brendan T. Finucane- Page 626:
There are many reports of emergency responders using cricothyrotomy to establish a definitive airway in the prehospital setting.