Arterial gon ketish, Venoz gon ketish, Kapillyar gan ketish. Qon ketish darajalari: 1-daraja: 10-15%, P 90-100, A/B 110-70, N 20-22. 2-daraja: 15-25%, P 100-110, A/B 100-60, N 22-24. 3-daraja: 25-30%, P 120-130, A/B 70-50, N 30. 4-daraja: 30-60%, P 140-160, A/B 40-0, N 30-40 (yuzaki)