75 years old male was resuscitated from asystole. The average compression frequency was 96/min and depth 56 mm. Only 1% of compressions were committed with incomplete release from chest and flow time was 100%. The values for rSO2 were 15–18%, and quality of CPR showed no reflections to rSO2. A minor increase of rSO2 was observed after ROSC.
81 years old female was resuscitated from PEA. Compression frequency was 103/min and depth 53 mm, 1% with incomplete release, and flow time 84%. There was an almost immediate increase in rSO2 from 25% to 38%. She achieved ROSC after 11 min where after rSO2 rose to 67%. This patient is a secondary survivor.
72-yr old female was resuscitated 17 min from asystole. Average compression frequency was 109/min, and depth 44 mm. 93% of compressions were adequate in depth but 10% of had an incomplete release. Flow time was 90%. During the entire procedure the rSO2 was 15%, despite the relatively good quality of CPR. No ROSC was achieved.