Pathology EMQ template.

Name: Bhakti Visani

Theme: Acid base balance

 

OPTION LIST

 

A	Metabolic acidosis	I	Respiratory acidosis with metabolic compensation
B	Metabolic alkalosis	J	Respiratory alkalosis with metabolic compensation
C	Respiratory acidosis	K
D	Respiratory alkalosis	L
E	Mixed metabolic and respiratory acidosis	M
F	Mixed metabolic and respiratory alkalosis	N
G	Metabolic acidosis with respiratory compensation	O
H	Metabolic alkalosis with respiratory compensation	P

 

 

For each scenario below, choose the most appropriate answer from the list above. Each option may be used once, more than once or not at all.

 

1. 65 yo woman with hypokalaemia, blood gases show pH 7.5, PaCO2 8.2, HCO3 39mEq/L.

 

(Normal ranges: pH = 7.35-7.45, PaCO2 = 4.7 – 6 kPa, HCO3 = 22-29 mEq/L)

 

2. 22 yo female faints during a panic attack, blood gases show pH 7.62, Pa CO2 2.0, HCO3 20 mEq/L

 

 

3. 15 yo diabetic girl brought into A&E, blood gases show pH 7.27, PaCO2 2.9, HCO3 19 mEq/L

 

 

4. A student travelling in Thailand develops diarrhoea for 3 days, his blood gases are likely to show what?

 

 

5. Elderly lady in hospital with COPD develops acute renal failure, blood gases show pH 7.1, PaCO2 8.3, HCO3 12mmol/L

 

 

 

ANSWERS

1. H

2. D

3. A

4. A

5. E