Cardio pulmonary resuscitation quality feedback system

A computer program stored on a non-transitory computer readable medium, wherein the computer program is adapted to, when executed in a processor of a system comprising a measuring unit for providing a measure of blood pressure of a patient and an indicator unit for providing an indication of a blood pressure CPR quality indicator, implement the steps of:

• while CPR is being performed on the patient, obtaining blood pressure of the patient for a time period,
• calculating, using the blood pressure as a function of time, the blood pressure CPR quality indicator, and if the blood pressure CPR quality indicator is outside a quality criterion, then transmitting a low quality indication signal, and if the blood pressure CPR quality indicator fulfills the quality criterion the threshold, then transmitting a high quality indication signal,
• registering a depth of compression of CPR and displaying a signal indicating the depth of compression,
• operating, during an optimization interval, to obtain an optimal compression depth based on (i) a first CPR quality indicator obtained in response to CPR with a previously determined optimal compression depth, (ii) a second CPR quality indicator obtained in response to continued CPR with a step up in compression depth relative to the previously determined optimal compression depth, and (iii) a third CPR quality indicator obtained in response to further continued CPR with a step down in compression depth relative to the previously determined optimal compression depth, and
• selecting a new optimal compression depth for a subsequent time interval based on the first, second and third CPR quality indicators, wherein the new optimal compression depth, selected from among three applied compression depths that include the previously determined optimal compression depth, the step up in compression depth relative to the previously determined compression depth, and the step down in compression depth relative to the previously determined compression depth, is defined as a depth with a highest blood pressure CPR quality indicator value or as a smallest depth with a blood pressure CPR quality indicator value that exceeds a target blood pressure CPR quality indicator value.

A method for providing feedback regarding chest compressions in CPR, using a system comprising a measuring unit providing a measure of blood pressure of a patient, the method comprising:

• while CPR is being performed on the patient, obtaining blood pressure of the patient for a time period,
• calculating using the blood pressure as a function of time, a blood pressure CPR quality indicator, and if the blood pressure CPR quality indicator is outside a quality criterion, then transmitting a low quality indication signal, and if the blood pressure CPR quality indicator fulfills the quality criterion the threshold, then transmitting a high quality indication signal,
• registering a depth of compression of CPR and displaying a signal indicating the depth of compression,
• operating, during an optimization interval, to obtain an optimal compression depth based on (i) a first CPR quality indicator obtained in response to CPR with a previously determined optimal compression depth, (ii) a second CPR quality indicator obtained in response to continued CPR with a step up in compression depth relative to the previously determined optimal compression depth, and (iii) a third CPR quality indicator obtained in response to further continued CPR with a step down in compression depth relative to the previously determined optimal compression depth, and
• selecting a new optimal compression depth for a subsequent time interval based on the first, second and third CPR quality indicators, wherein the new optimal compression depth, selected from among three applied compression depths that include the previously determined optimal compression depth, the step up in compression depth relative to the previously determined compression depth, and the step down in compression depth relative to the previously determined compression depth, is defined as a depth with a highest blood pressure CPR quality indicator value or as a smallest depth with a blood pressure CPR quality indicator value that exceeds a target blood pressure CPR quality indicator value.