II. parameters of acid-base 1. pH important and inexact parameter normal range: 7.35-7.45 2. Paco2 partial pressure of co2 of dissolved in arterial plasma(respiratory parameter) normal range: 4.4-6.25kPa(33-46mmHg primary change. respiratory acidosis - Paco, T respiratory alkalosis→PaCO2↓ secondary change: meta bolic acidosis PacO,I metabolic alkalosis Paco, lⅡ.parameters of acid-base 1. pH important and inexact parameter normal range: 7.35~7.45 2. PaCO2 partial pressure of CO2 of dissolved in arterial plasma (respiratory parameter) normal range: 4.4~6.25kPa(33~46mmHg) primary change: respiratory acidosis PaCO2 respiratory alkalosis PaCO2 secondary change: metabolic acidosis PaCO2 metabolic alkalosis PaCO2