General Medicine General 2b3bbc04 All true about Laryngeal mask airway (LMA) except A The invention of the device is by Dr Archie Brain B It is composed of a small "mask' designed to sit in the hypo pharynx C It allows positive - pressure ventilation with upto 20 cm H2O D Cuff pressure 60 cm H2O of laryngeal mask can adequate prevent aspiration