Anaesthesia Breathing Systems 6def1440 Maximum O2. concentration attained in venture mask is? A 90% B 100% C 60% D 80% High-Yield Explanation ANSWER: (C) 60%REF: Ajay Yadav 2ad ed p.35Equipment and oxygen delivered in %Nasal canula - 44%Venturi mask - 60%Oxygen mask - 60%Ventilators -100%