(CPR) timer (10) is disclosed CPR for use to provide a visual pacing device when cardiopulmonary resuscitation is performed on a patient, the bag mask resuscitator with (2). When using a bag mask resuscitator to provide life support to a patient, CPR timer, multiple to be started sequentially at a predetermined pace that matches the pace recommended chest compression and air delivery time or / and sequenced I include the (20,22,24,26,28) visual indicator. In order to detect when the mask resuscitator bag is activated, CPR timer further comprises (21) a pressure sensor that is operably coupled to the mask resuscitator bag.
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