HeartSine samaritan PAD SAM 500P User Manual page 34

Technical Data
The CPR Advisor Analysis Algorithm
The following summary shows the results produced by the CPR component of the
diagnostic algorithm, when run against the clinical database.
The importance of administering effective chest compressions can mean the difference
between a patient having a good quality of life following a cardiac arrest and having the
misfortune of suffering neurological impairment due to inadequate cerebral oxygenation.
Most modern defibrillators and mechanical resuscitation systems have a metronome
facility to ensure an operator administers CPR at the correct rate. A feedback system to
ensure the operator delivers compressions at the correct depth, so enabling adequate
re-filling time, would optimise coronary perfusion pressures. Impedance cardiography
(ICG) measures the changes of shape and movement of blood in the thorax, which
can be a useful indicator of perfusion levels during external cardiac massage. The
impedance cardiogram can be accurately measured using two standard defibrillator
electrodes.
Combining both the force and speed CPR management tools will enhance CPR efficacy
for both lay users and minimally trained bystanders.
CPR Criteria
CPR speed: good
CPR force:
adequate
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Performance
Specifications
Sensitivity > 90%
Specificity > 90%
Sensitivity > 90%
Specificity > 90%
Performance
Results (%)
96.05
93.01
99.91
97.95