Comment PHYSIOLOGY and I'll send you the topic summary.

The device might say:

“perfect depth”.

But the patient might be saying something else:

EtCO₂ at 5, no pulse wave, no useful plethysmography.

And that's the point:

CPR is not about hitting centimeters.

It's about generating perfusion.

Mechanical feedback helps.

The algorithm commands.

The metronome maintains the rhythm.

But physiology tells you if you're actually moving blood.

Less “checklist CPR”.

More perfusion-guided CPR.

Read the full analysis here: