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Category Archives: Lab Cases

Clinical Cases based on lab results

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Lab case 406 interepretation

Posted on May 30, 2023 by Basil Muharb

Answers:

PH = 7.56, that is moderate alkalaemia

HCO3 = 38.4 mmol/L, so we have metabolic alkalosis.

Next, we will calculate the compensation. For metabolic alkalosis we use the following equation:

Continue reading →

Posted in Lab Cases

Lab case 406

Posted on May 23, 2023 by Basil Muharb

An alcoholic man presented to the emergency department after suffering from a seizure. His venous blood gases showed the following:

PH = 7.56

pCO2 = 42 mmHg

Continue reading →

Posted in Lab Cases, Uncategorized

Lab case 405 interepretation

Posted on May 23, 2023 by Basil Muharb

Answers:

PH = 7.30, that is mild acidaemia.

pCO2 = 65 mmHg. So, we have respiratory acidosis.

Next, we need to look at the compensation. Compensation for respiratory acidosis is different between acute and chronic cases.

Continue reading →

Posted in Lab Cases

Lab case 405

Posted on May 9, 2023 by Basil Muharb

60 year-year-old man with history of DM and x-smoker but not known to have COPD. Presented to an emergency department with shortness of breath. His blood gases showed the following:

PH = 7.30

pCO2 = 65 mmHg

Continue reading →

Posted in Lab Cases

Lab case 404 interpretation

Posted on May 9, 2023 by Basil Muharb

PH = 7.395, that is within normal range.

pCO2 = 42 mmHg, Normal for venous blood gases ( Normal pCO2 is 40 mmHg for arterial blood and 48 mmHg for venous).

HCO3 = 25 mmol/L. that is very slightly above the normal (normal level is 24)

Continue reading →

Posted in Lab Cases

Lab case 404

Posted on April 30, 2023 by Basil Muharb

25 year-old-man with type 1 DM presented with diarrhoea and vomiting. His VBG showed the following:

PH = 7.395

pCO2 = 42 mmHg

pO2 = 54 mmHg

Continue reading →

Posted in Lab Cases

Lab case 403 interpretation

Posted on April 30, 2023 by Basil Muharb

PH = 7.745, that is severe alkalaemia.

pCO2  = 36 mmHg is low so we have respiratory alkalosis.  However this value is very close to normal value of 40. This won’t explain the severely elevated PH.

Continue reading →

Posted in Lab Cases

Lab case 403

Posted on April 24, 2023 by Basil Muharb

48-year-old man with history of Crohn’s disease and previous cardiac arrest. This patient presented with diarrhoea and vomiting for 2 days. His first VBG showed the following:

PH = 7.745

Continue reading →

Posted in Lab Cases

Lab case 402 interpretation

Posted on April 12, 2023 by Basil Muharb

Answers:

Ph = 7.56, that is alkalaemia

Both HCO3 and pCO2 are low. So, most likely we have combined metabolic and respiratory alkalosis. We will start with the metabolic alkalosis as it is easier to run the calculations for the blood gases on the metabolic side.

Continue reading →

Posted in Lab Cases

Lab case 402

Posted on April 4, 2023 by Basil Muharb

70-year-old diabetic man presented with vomiting. His venous blood gases showed the following:

PH = 7.56

pCO2 = 19 mmHg

Continue reading →

Posted in Lab Cases

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