Cpr time indicator for ventilations for a defibrillator data management system

Abstract

A system is disclosed wherein patient data, such as an electrocardiogram (“ECG”) signal or a chest impedance measurement signal, collected by a defibrillator device during a resuscitation event is analyzed and processed by a computing device to provide an assessment of CPR administered during the event. The CPR assessment results in one or more CPR figures of merit that relate to temporal characteristics of the CPR relative to the duration of the event. In one embodiment, the CPR figure of merit represents a percentage of the event period during which chest compressions were administered to the patient.

1 . A method for assessing cardio-pulmonary resuscitation (“CPR”) performed on a patient during a resuscitation event, the method comprising:
 receiving post-event data about the patient from at least one patient signal electronically captured during the resuscitation event, in which the resuscitation event includes at least one interval of chest compression delivery and at least one interval of defibrillation therapy delivery; 
 obtaining an event time interval for the resuscitation event; 
 processing the post-event data to determine at least one CPR figure of merit that is indicative of a ventilation rate based upon the number of ventilations administered to the patient during the event time interval; and 
 generating a report containing the determined CPR figure of merit. 
 
     
     
         2 . The method of  claim 1 , in which
 processing the post-event data includes analyzing characteristics of the post-event data to identify periods during which ventilations were administered to the patient.   
     
     
         3 . The method of  claim 1 , in which
 the post-event data includes a patient impedance signal for the patient, and   processing the post-event data includes analyzing fluctuations in the patient impedance signal to identify periods during which ventilations were administered to the patient.   
     
     
         4 . An apparatus comprising a processor configured to:
 receive post-event data about a patient on whom cardio-pulmonary resuscitation (“CPR”) has been performed during a resuscitation event, the post-event data from at least one patient signal electronically captured during the resuscitation event, in which the resuscitation event includes at least one interval of chest compression delivery and at least one interval of defibrillation therapy delivery;   obtain an event time interval for the resuscitation event;   process the post-event data to determine at least one CPR figure of merit that is indicative of a ventilation rate based upon the number of ventilations administered to the patient during the event time interval; and   generate a report containing the determined CPR figure of merit.   
     
     
         5 . The apparatus of  claim 4 , in which
 processing the post-event data includes analyzing characteristics of the post-event data to identify periods during which ventilations were administered to the patient.   
     
     
         6 . The apparatus of  claim 4 , in which
 the post-event data includes a patient impedance signal for the patient, and   processing the post-event data includes analyzing fluctuations in the patient impedance signal to identify periods during which ventilations were administered to the patient.   
     
     
         7 . A computer-readable storage medium comprising instructions for causing a programmable processor to:
 receive post-event data about a patient on whom cardio-pulmonary resuscitation (“CPR”) has been performed during a resuscitation event, the post-event data from at least one patient signal electronically captured during the resuscitation event, in which the resuscitation event includes at least one interval of chest compression delivery and at least one interval of defibrillation therapy delivery;   obtain an event time interval for the resuscitation event;   process the post-event data to determine at least one CPR figure of merit that is indicative of a ventilation rate based upon the number of ventilations administered to the patient during the event time interval; and   generate a report containing the determined CPR figure of merit.   
     
     
         8 . The computer-readable storage medium of  claim 7 , in which
 processing the post-event data includes analyzing characteristics of the post-event data to identify periods during which ventilations were administered to the patient.   
     
     
         9 . The computer-readable storage medium of  claim 7 , in which
 the post-event data includes a patient impedance signal for the patient, and   processing the post-event data includes analyzing fluctuations in the patient impedance signal to identify periods during which ventilations were administered to the patient.