21-year-old man brought for ED for impaired mental state, he was extremely agitated and needed 6 staff members to restrain him for IV access and sedation. His venous blood gases showed the following:
PH = 6.9
pCO2 = 24 mmHg
Author Archives: Basil Muharb
Lab case 399 Interepretation
Question 1:
PH = 7.43 that is with in normal range, more toward alkalotic spectrum
HCO3 = 39.9, that is elevated so we have metabolic alkalosis. Next we need to check the compensation process.
Lab case 399
38 year old lady presented to the emergency department with recurrent vomiting. She was found to have a slipped lapband. Her venous blood gases showed the following
PH = 7.43
pCO2 = 61 mmHg
Lab case 398 interepretation
Question 1:
PH = 7.14, that is severe acidaemia
pCO2 = 53 mmHg, So we have respiratory acidosis. Next we will calculate the compensation.
Lab case 398
75 year old man was brought to ED by ambulance in VF cardiac arrest , CPR in progress. His venous blood gases showed the following
PH = 7.14
pCO2 = 53 mmHg
Lab case 397 Interpretation
Question 1:
PH = 7.32 ( less than 7.35) so, we have mild acidaemia.
PCO2 = 48 (on arterial blood gas > 40), so we have respiratory acidosis.
Lab case 397
32-year-old man presented to ED with an asthma attack. on 3L O2, his arterial blood gases showed the following:
PH = 7.32
Lab case 396 interpretation
Question 1:
PH = 7.30 that is mild acidaemia.
HCO3 = 16 mmol/L (>24) so we have metabolic acidosis.
Next, we need to calculate the anion gap and the compensation (using Winter’s formula)
Lab case 396
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 395 Interpretation
Question 1:
PH = 7.29 That is moderate acidaemia
PCO2 = 60 mmHg, that is high (>40). So, we have respiratory acidosis.
Next, we need to look at HCO3 to determine if it is acute or chronic respiratory acidosis.