Intraventricular Pressure and Volume during Conventional and Automated Head-up CPR.

Background: Active compression-decompression (ACD) CPR, an impedance threshold device (ITD) and automated head and thorax elevation, collectively termed AHUP-CPR, increases cerebral and coronary perfusion pressures, brain blood flow, end-tidal CO2 (ETCO2) and cerebral oximetry (rSO2) in animal models compared with conventional (C) CPR. We tested the hypothesis that cardiac stroke volume (SV) is higher with AHUP-CPR versus C-CPR or ACD+ITD in a porcine cardiac arrest model.

Methods: Farm pigs (n=14) were sedated, anesthetized, and ventilated.

Active decompression during automated head-up cardiopulmonary resuscitation.

Background: The combination of active compression-decompression cardiopulmonary resuscitation (ACD-CPR) with an impedance threshold device (ITD) and controlled head-up positioning (AHUP-CPR) is associated with improved outcomes compared with conventional CPR (C-CPR). This study focused on the role of active decompression (AD) during AHUP-CPR.

Methods: Farm pigs (n = 10, ∼40 kg) were anesthetized, intubated and ventilated.