# Lab case 430 interpretation

Question 1:

PH = 7.475, that is mild alkalaemia.

pCO2 = 24 mmHg. So, we have respiratory alkalosis.

# Lab case 430

14-year-old girl, COVID day 2, presented with delirium. Her venous blood gases showed the following:

Ph = 7.475

pCO2 = 24 mmHg

# Lab case 429 interpretation

Question 1:

PH = 7.31, that is mild acidaemia

PCO2 is high (51 mmHg). So we have respiratory acidosis. We don’t have enough information to decide if it is acute or chronic

# Lab case 429

70 year old man presented with reduced level of consciousness.

His venous blood gas showed the following:

PH = 7.31

PO2 = 62 mmHg (on 6L O2)

# Lab case 428 interpretation

PH = 7.479, that is mild acidaemia.

HCO3 = 30 mmol/L (that is high). So, we have metabolic alkalosis.

Next we check the respiratory compensation for metabolic alkalosis. For That we use the following equation:  Expected pCO2 = 0.7 x HCO3 + 20 (+/- 5).

# Lab case 428

28 days old boy brought by his parents for multiple vomiting episodes. His venous gases showed the following:

PH = 7.479

pCO2 = 41 mmHg

pO2 = 34 mmHg

# Lab case 427 interpretation

PH = 7.236, that is moderate acidaemia

HCO3 = 12.5 mmol/L. So we have metabolic acidosis.

Next we need to calculate the compensation and the the anion gap.

# Lab case 427

21 year old man presented to ED with fatigue and weakness. His blood gases showed the following:

PH = 7.236

PCO2 = 30 mmol/L