NR 324 Running Review Week 1 Lewis Ch. 16: Fluid, Electrolyte, and Acid-Base Imbalances • Labs o ABG: arterial blood gases  pH: 7.35-7.45 • the measurement of Hydrogen ions in the blood/body • whether the body is in a state of acidosis or alkalosis  PaCO2: 35-45 mm Hg • Needed because it controls our respiratory drive, and is needed for homeostasis  HCO3: 22-26 mmol/L • Buffer that helps stop acidosis  PaO2: 80-100 mm Hg • Number 1 number because it tells you how much oxy...