A Cardio-Pulmonary Resuscitation system that is usable by a rescuer to care for a patient, the CPR system comprising: a retention structure (440, 540, 2440) configured to retain a body of the patient; a communication module configured to receive a pause instruction having a pause time duration from another device; a compression mechanism attached to the retention structure, the compression mechanism configured to perform, while the body is thus retained, automatically CPR compressions to a chest of the body alternating with releases of the CPR compressions, a counter configured to count a number of CPR compressions in a second group of CPR compressions performed by the compression mechanism; a controller configured to: control the compression mechanism to perform a first group (471, 571, 671, 871, 1671, 2171, 2271) of CPR compressions of at least 120 of the CPR compressions, stop the compression mechanism during a check pause (491, 492, 591, 691, 891, 992, 1092, 1291, 1691) from performing the CPR compressions of the first group, the chest not becoming thus compressed during the check pause, the check pause lasting at least 5 sec, then, upon an end of the check pause, control the compression mechanism to perform the second group (472, 672, 872, 972, 1072, 2172, 2272) of the CPR compressions, and determine whether a check patient condition has been met, the check patient condition including that a threshold number of the CPR compressions have been performed in the second group, the threshold number being at least 120, or that the pause instruction has been received from the other device, even if the threshold number of CPR compressions in the second group has not been performed yet; and a user interface (414, 714, 1114, 1514, 1714, 1814, 1914, 2014) configured to output a human-perceptible check patient prompt (421, 422, 621, 622, 822, 921, 1022) responsive to the check patient condition becoming met, the check patient prompt reminding the rescuer to check the patient for a condition other than ventilating the patient. a retention structure (440, 540, 2440) configured to retain a body of the patient; a communication module configured to receive a pause instruction having a pause time duration from another device; a compression mechanism attached to the retention structure, the compression mechanism configured to perform, while the body is thus retained, automatically CPR compressions to a chest of the body alternating with releases of the CPR compressions, a counter configured to count a number of CPR compressions in a second group of CPR compressions performed by the compression mechanism; a controller configured to: control the compression mechanism to perform a first group (471, 571, 671, 871, 1671, 2171, 2271) of CPR compressions of at least 120 of the CPR compressions, stop the compression mechanism during a check pause (491, 492, 591, 691, 891, 992, 1092, 1291, 1691) from performing the CPR compressions of the first group, the chest not becoming thus compressed during the check pause, the check pause lasting at least 5 sec, then, upon an end of the check pause, control the compression mechanism to perform the second group (472, 672, 872, 972, 1072, 2172, 2272) of the CPR compressions, and determine whether a check patient condition has been met, the check patient condition including that a threshold number of the CPR compressions have been performed in the second group, the threshold number being at least 120, or that the pause instruction has been received from the other device, even if the threshold number of CPR compressions in the second group has not been performed yet; and control the compression mechanism to perform a first group (471, 571, 671, 871, 1671, 2171, 2271) of CPR compressions of at least 120 of the CPR compressions, stop the compression mechanism during a check pause (491, 492, 591, 691, 891, 992, 1092, 1291, 1691) from performing the CPR compressions of the first group, the chest not becoming thus compressed during the check pause, the check pause lasting at least 5 sec, then, upon an end of the check pause, control the compression mechanism to perform the second group (472, 672, 872, 972, 1072, 2172, 2272) of the CPR compressions, and determine whether a check patient condition has been met, the check patient condition including that a threshold number of the CPR compressions have been performed in the second group, the threshold number being at least 120, or that the pause instruction has been received from the other device, even if the threshold number of CPR compressions in the second group has not been performed yet; and a user interface (414, 714, 1114, 1514, 1714, 1814, 1914, 2014) configured to output a human-perceptible check patient prompt (421, 422, 621, 622, 822, 921, 1022) responsive to the check patient condition becoming met, the check patient prompt reminding the rescuer to check the patient for a condition other than ventilating the patient.