Deciding on patient electric shock therapy

A defibrillator, comprising:

• an energy storage module configured to store an electrical charge;
• a defibrillation port configured to provide the stored electrical charge to electrodes for delivery to a person;
• and
• a processor configured to:
• receive latter data collected from a patient during a session, the latter data being ECG data that is collected while the patient has been receiving chest compressions;
• and
• decide from the latter data whether a latter electric shock should be administered or not to the patient, the decision being according to a first decision manner if no early electric shock has been administered to the patient during the session prior to when the latter data was collected, and according to a second decision manner different from the first decision manner otherwise, in which
• a scoring parameter is computed from the latter data by an algorithm,
• deciding according to the first decision manner includes deciding that the latter shock should be administered if the scoring parameter meets a first condition, but should not be administered otherwise, the first condition being that the scoring parameter is larger than a first shocking threshold, and
• deciding according to the second decision manner includes deciding that the latter shock should be administered if the scoring parameter meets a second condition but should not be administered otherwise, the second condition being different from the first condition, the second condition being that the scoring parameter is larger than a second shocking threshold different from the first shocking threshold, and further in which
• a confidence score is computed,
• a confidence condition is not met if the confidence score is less than a confidence threshold,
• the confidence threshold is different for the first decision manner than the second decision manner, and
• when it is decided that the latter electric shock should not be administered, a prompt is caused to be issued for pausing the chest compressions if the confidence condition is not met.