Then the RB bag was filled with helium and oxygen according to the preset filling volume and its contents were analyzed. The patient was asked to approach the mouthpiece and close his nose with the noseclip. He should breathe quite normally.
Then theRB bag was filled with helium and oxygen according to thepreset filling volume and its contents were analyzed. Thepatient was asked to approach the mouthpiece and close hisnose with the noseclip. He should breathe quite normally.