Critical care interventions have a short cycle time allowing rapid assessment of treatment effects.

“the reason I think critical care is so interesting and at the same time so teachable is the cycle time between intervention and feedback is so short you want to know what happens to the pH on the blood and the VCO 2 and the bicarb when you change the ventilator rate you're gonna find out in about 12 minutes do it yeah right you want to find out what happens when you tweak this amount of norepinephrine and this much of vasopressin and this much of this and the IV fluids and boom-boom look at the swan-ganz catheter like you're gonna see it in a minute”