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Figure 5 (A) Recordings during AutoPulse cardiopulmonary resuscitation (A-CPR) before and after airway catheter withdrawal. The catheter was advanced down the airway until high airway pressure was recorded (distal). The catheter was then withdrawn 6 cm, and the lower airway pressure was recorded (proximal). (B) Recordings during conventional (piston) cardiopulmonary resuscitation before and after airway catheter withdrawal. The catheter was manipulated as with A-CPR. All pressures in mm Hg. AO = aortic; RA = right atrial.
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