What does this test include?
A 15-parameter complete blood count measures the main red-cell, white-cell and platelet quantities and indices. A separate white-cell differential is not stated as part of this test.
Why might it be ordered?
- To check for patterns such as anaemia, altered white-cell count or platelet changes.
- For routine monitoring or before some treatments and procedures.
What sample is needed?
A blood sample is required. The laboratory chooses the correct tube and handles the sample for this test.
How should you prepare?
Fasting is usually unnecessary. Hydrate normally and mention recent infection, bleeding, pregnancy and relevant medicines.
How are the results reported?
Interpret the counts and indices together. A result just outside the interval may be temporary, while a marked or persistent change can need repeat or more targeted testing.
Sources and editorial status
This patient-facing text is an editorial draft. It should be approved by a laboratory physician before official publication.