J Emerg Med
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Randomized Controlled Trial
"Push as Hard as You Can" Instruction for Telephone Cardiopulmonary Resuscitation: A Randomized Simulation Study.
The medical priority dispatch system (MPDS®) assists lay rescuers in protocol-driven telephone-assisted cardiopulmonary resuscitation (CPR). ⋯ There is no difference in compression depth, quality of CPR, or physical strain on lay rescuers using the initial instruction "push as hard as you can" vs. the standard MPDS(®) instruction "push down firmly 5 cm."