Name: Rakhi Sehmi

Theme: Reference Intervals

OPTION LIST

A	130	I
B	90	J
C	2.2	K
D	30	L
E	15	M
F	290	N
G	4	O
H		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. A 65-year-old chronic alcoholic presents to the A&E Department with a minor head injury. On examination he is found to be pale. Blood tests show a high MCV. What is the likeliest result of MCV (fl) in a normal person?

2. A 40-year-old woman presents with a two month history of tiredness, intermittent pyrexia and abdominal pain. On examination she has an enlarged palpable spleen. Blood tests show anaemia with a raised white cell count. What is the likeliest result of a white cell count (x 10⁹ per l) in a normal person?

3. A 5-year-old boy presents with a purpuric rash and petechiae following a recent viral infection. Blood tests showed thrombocytopenia. What is the likeliest result of a platelet count (x10⁹/l) in a normal person?

4. A 35-year-old man presents with hypertension. Blood tests show normal sodium, urea and glucose and a raised potassium. What is the likeliest result of potassium (mmol/l) in a normal person?

5. A 70-year-old woman presents in a coma with a long history of polyuria and polydipsia. Investigations show that her plasma osmolarity is raised. What is the likeliest result of plasma osmolarity (mmol/l) in a normal person?

ANSWERS

1. B

2. G

3. F

4. G

5. F