Acid-base interpretation: compensation Flashcards Preview

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Flashcards in Acid-base interpretation: compensation Deck (15):
1

If you have respiratory acidosis, how do the kidneys compensate?

the kidneys secrete excess H+ and reabsorb more HCO3

2

If you have respiratory alkalosis, how do the kidneys compensate?

the kidneys excrete excess HCO3 and reabsorb more H+

3

If the metabolic system is compromised, how does the body compensate?

The respiratory tract tries to fix the pH

4

If you have a metabolic acidosis, how does the respiratory system compensate?

Increased ventilation to blow off more CO2

5

If you have metabolic alkalosis, how does the respiratory system compensate?

Decrease ventilation to retain CO2

6

Respiratory acidosis
-If the problem is acute?

For every 10 mmHg change in CO2 there will be a 1 mEq/L of HCO3
Expected [HCO3]= 24 + ((PaCO2-40)/10)

7

Respiratory acidosis
-If the problem is chronic?

For every 10 mmHg change in CO2 there will be a 3-4 mEq/L of HCO3
Expected [HCO3]= 24 + 4((PaCO2-40)/10)

8

Respiratory alkalosis
-equation if acute?

Expected [HCO3]= 24-2((40-PaCO2)/10)

9

Respiratory alkalosis
-Equation if chronic?

Expected [HCO3]= 24-5((40-PaCO2)/10)

10

Metabolic acidosis
-Equation if respiratory compensation is adequate?

Expected [PaCO2]= (1.5[HCO3]+8) +_ 2

11

Whenever you have a metabolic acidosis, you must?

Calculate the anion gap (normal is less than or equal to 12)

12

Anion gap=?

[Na]-([Cl]+[HCO3])

13

Mnemonic for elevated anion gap?

MUDPILES
Methanol
Uremia
Diabetic ketoacidosis, starvation, alcoholic ketoacidosis***
Paraldehyde
Isoniazid or iron
Lactic acidosis***
Ethylene glycol or ethanol
Salicylates***

14

Metabolic alkalosis
-Equation if respiratory compensation is adequate?

deltaPaCO2=(.5 to 1) deltaHCO3

15

If the respiratory system is compromised, how does the body compensate?

the kidneys try to compensate by fixing the pH