ABG's Flashcards
(19 cards)
What does the pH measure?
H+ ion concentration
What does Pa02 measure?
Inspired oxygen
Partial Pressure of O2 in arterial blood
What does PaC02 measure?
CO2 in arterial blood
What does Base Excess measure?
How much base needs to be added or removed to restore the pH
What is the normal range for pH?
7.35 - 7.45
What is the normal range for PaO2?
9.3 - 13.3 KpA
What is the normal range for PaCO2?
4.7 - 6 KpA
What is the normal range for BE?
-2 to +2
What does increased PaCO2 suggest?
Respiratory acidosis
What does decreased PaCO2 suggest?
Respiratory alkalosis
How is metabolic acidosis compensated?
Increased PaC02 through hypoventilation
How is metabolic alkalosis compensated?
Decreased PaCO2 through hyperventilation
What does a very -ve BE suggest?
Metabolic acidosis
What does a very +BE suggest?
Metabolic alkalosis
How is respiratory acidosis compensated?
Retaining bicarbonate and creating metabolic alkalosis
How is respiratory alkalosis compensated?
Excreting bicarbonate and creating metabolic acidosis
An 18 year male with a 48 hour of polydipsia and polyuria.
His BM is 42.
Fi02 0.21* pH 7.1 (7.35-7.45) P02 8 (9.3-13.3) PC02 5 (4.7-6) BE -10 (-2 to +2).
Describe these results.
This patient is hypoxic and has metabolic acidosis with no compensation
Diagnosis likely DKA
22 year old female. History of anxiety and depression. She presents to AE with breathlessness and tingling fingers.
Fi02 0.21 pH 7.6 (7.35-7.45) P02 13 (9.3-13.3) PC02 3 (4.7-6) BE +1 (-2 to +2)
Describe these results
This patient has respiratory alkalosis with no compensation
14 year old boy with a 48 hour history of flu like symptoms. He has presented with headache, photophobia and a purpuric rash.
Fi02 0.21 pH 7.2 (7.35-7.45) P02 8 (9.3-13.3) PC02 7 (4.7-6) BE -10 (-2 to +2)
Describe these results
This patient has Mixed respiratory & metabolic acidosis with no compensation
