B4.038 - Interpreting Arterial Blood Gas Prework 1 Flashcards
Diagnosing an acid base disorder requires simultaneous measurement of what
serum electrolytes and arterial blood gas
What does measuring arterial blood gas measure
PCO2, PO2 and pH
What is a normal pH
7.38 - 7.42
What is normal pCO2
38-42
what is a normal pO2
80 (104 - .27(age))
as pH increases what happens to [H+}
it decreases
a change in the ration of pCO2/HCO3- predicts what
the change in pH, NOT actual concentrations
a drop or rise in PCO2 reflects what with respect to H+ concentration
H+ will drop or rise respectively
how does a drop or rise in bicarb level reflect [H+]
they are inversely related
optimal pH
7.4
optimal pCO2
40
optimal HCO3-
24
overall acid base status is defined by
pH
what is acidemia
decrease in blood pH below normal
what is alkalemia
elevation in blood pH above normal
what is metabolic acidosis
increased [H+} due to reducing HCO3-
what is respiratory acidosis
Increased [H+} due to increasing PCO2
what is metabolic alkalosis
reduced [H+} by increasing HCO3-
what is respiratory alkalosis
reduced [H+} be decreasing PCO2
in a simple disorder what should be seen with respect to PCO2 and HCO3
they should move in the same direction to keep the ratio balanced