How Do You Know if You Have a Chest Compression?

In the animal study portion, it was actually a higher and tidal CO2 overall than the others. Is that just an anomaly of their experimental model or would we expect to have higher than expected values? I think that when, you know, okay, remember that chest compressions are ongoing even if you don't see them in blood cells. So what's happening is that distal to the airway solution, you will fill up with CO2 into the distal part of the lung, and then you mentally let you go down and collect this.