Abstract P165: Leverage-assisted Active Compression-decompression Cardiopulmonary Resuscitation: Comparison of Physical Demands with Manual Active Compression-decompression and Standard Cardiopulmonary Resuscitation
Background: Active compression-decompression (ACD) cardiopulmonary resuscitation (CPR) can potentially improve CPR hemodynamics and survival outcomes. However, its application is limited by technical difficulty and increased physical demands. We therefore develop a leverage-assisted ACD (L-ACD) CPR device aiming at labor-saving, efficiency and ease of performance.
Methods: Using a backboard-braced leverage adjunct, we connected the ACD suction cup to one end of the lever, with downward compression and upward decompression controlled by alternative downward pushing of both lever bars. The physiological parameters of the rescuers were compared between L-ACD CPR and traditional manual ACD and standard CPR. The participants first received a maximal exercise test, and then performed 6 min of each type of CPR on 3 separate days. The rate and magnitudes of compression and decompression were in accordance with the AHA guidelines, and were real-time monitored to ensure CPR quality. Physiological parameters including heart rate, oxygen uptake, metabolic equivalence and serum lactate were measured during the above maximal exercise test and CPR practice. The mean values from 4th to 6th min of CPR practice were used for analysis.
Results: Ten participants were included. Compared to standard CPR, the heart rate, oxygen uptake, metabolic equivalence and serum lactate were significantly higher in ACD CPR (Table 1⇓). With the aid of leverage, the oxygen uptake, metabolic equivalence and lactate of L-ACD CPR became significantly lower compared to manual ACD CPR, though they were still higher than standard CPR. Specifically, the percentage of maximal oxygen uptake fell below 50%, suggesting that the performers might be able to practice L-ACD CPR for a longer time without fatigue.
Conclusion: L-ACD CPR can be performed with lower physical demands compared to manual ACD CPR. With proper training, it can be applied to a larger population of rescuers with higher consistency.