Introduction to Diagnostic Testing

Question 1

Describe the 6 steps of the diagnostic process.

Answer 1

1. History (presenting complaint, past medical history, social history, ICE)
2. Examination (general, systems)
3. Differential diagnosis
4. Investigations (biochem, microbiology, haematology, histopathology) / Imaging
5. Diagnosis
6. Management

Question 2

List 5 uses of investigations.

Answer 2

1. Diagnosis
2. Screening
3. Monitoring of treatment
4. Prognosis
5. Suitability for treatment

Question 3

What 3 things can irrelevant investigations lead to?

Answer 3

1. Unnecessary risk
2. Cost
3. False positive results