# Lab case 439

61-year-old man presented to ED with hypoglycemia that was difficult to correct with oral and IV dextrose. His venous blood gases showed the following.

PH = 7.30

PCO2 = 33   mmol/L

# Lab case 438 Interpretation

Answers:

PH = 7.39, that is within normal range/

pCO2 = 48 mmHg, that is slightly elevated (Can be considered normal for venous blood)

HCO3 = 29 mmol/L. That is high (Normal value is 24 mmol/L), SO, we have metabolic alkalosis.

# Lab case 438

80 year old lady with type 2 DM was referred for high blood sugar. Her blood gases showed the following:

PH = 7.39

pCO2 = 48 mmol/L

# Lab case 437 interpretation

Answers:

PH = 7.34, that is very mild acidaemia.

HCO3 = 14 mmol/L. So, we have metabolic acidosis.

Next we need to calculate Anion Gap and compensation.

# Lab case 437

A police recruit doing a 20 km pack hike. Collapsed. GCS on arrival was 7. His temperature was 39.2 on arrival. His venous blood gases showed the following:

PH = 7.34

pCO2 = 27 mmHg

# Lab case 436 interpretation

Answers:

PH = 7.391, that is within the normal range, slightly to the acidic side.

pCO2 = 57 mmHg, that is high. So we have respiratory acidosis.

It is not clear from the history if the condition is acute or chronic. Accordingly we are going to check for both.

# Lab case 436

58-year-old lady with history of obstructive sleep apnoea presented with Syncope. Her venous blood gases showed the following:

PH = 7.391

pCO2 = 57 mmHg

# Lab case 435 interpretation

Answers

PH = 7.507, that is alkalaemia

pCO2 = 28 mmHg. So, we have respiratory alkalosis.

# Lab case 435

60 year old man presented with fever and dysurea. His blood gases showed the following:

PH = 7.507

pCO2 = 28 mmHg

# Lab case 434 Interepretation

Question 1:

PH = 7.28, that is mild acidaemia

HCO3 = 17 mmol/L. So we have metabolic acidosis.