J Emerg Med
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We will describe the implementation of the LUCAS™1 chest compression device as standard equipment in the treatment of cardiac arrest across a large ambulance service and provide descriptive data on device-treated arrests and provider experience during the initial 2 years of use. ⋯ A large ambulance service in the United States initiated standard use of a mechanical compression device within 3 months. In an applied setting, the LUCAS™1 device fits most patients and was well received by prehospital providers. Resuscitation of limited duration due to early death or early ROSC frequently precludes device use, and this has important implications for evaluating the association between device use and ROSC in observational settings.