MICA · FIRST-LINE LEARNING NOTES
Understand, prioritise and organise follow-up
A laboratory request begins with a clinical question and ends with a communicated decision. Appropriate sampling and result follow-up are parts of the same clinical process.
Define the question before ordering
Specify the hypothesis, clinical probability and decision that the result could change. Distinguish diagnosis, screening and medicine monitoring. Check recent tests and their context before repeating panels. Extensive testing in a low-risk patient increases incidental abnormalities and potentially unhelpful investigations. Explain why some tests are not indicated.
[1]Ensure a reliable sample
Check identity, the request and information needed by the laboratory. Follow test-specific requirements for fasting when needed, timing, sampling before treatment where appropriate, transport and processing. Report medicines that may interfere. Haemolysis, misidentification or incorrect storage can produce misleading results; discuss these issues with the laboratory before attributing an abnormality to disease.
[2][1]Before testing, explain how a normal or abnormal result would change management. More tests also produce more out-of-range results without corresponding disease. Compare the value, trend and pre-analytical context. Planned monitoring requires an identified owner: ordering a test includes arranging receipt, interpretation and communication of the result.
[1][3]Interpret results within the clinical course
Check units, method, reference interval and previous values. An out-of-range value is not automatically disease; an in-range result does not exclude every condition. For kidney function, distinguish acute change from persistent abnormality and add indicated urine assessment. Major clinical discordance requires verification and discussion without delaying care for a potentially critical result.
[4][1]Close the result-management loop
Assign responsibility for receipt, interpretation and communication, including during absence. Track missing results and arrange urgent-result handling. Tell patients when to expect feedback and what to do if none arrives. Transfer responsibility explicitly. Record the explanation, action and any repeat testing; silence is not a safe result-management strategy.
[3]A learning situation
FICTIONAL CASE · SELF-REFLECTION WITHOUT A SCORE
A laboratory reports markedly elevated potassium in a haemolysed sample from a patient treated for hypertension. They appear well and a previous result was normal. The report arrives near the end of the day.
Can this be filed as an artefact without follow-up?
Read the reasoning
No. Haemolysis is a possible explanation, not confirmation. Contact the laboratory, assess context and promptly arrange confirmation and relevant assessment according to risk. Absence of symptoms does not exclude a dangerous abnormality. Keep responsibility explicit until the verified result is managed.
References and scope
- Optimising blood testing in primary care ↗
- WHO guidelines on drawing blood: best practices in phlebotomy ↗
- Acting upon electronic test results ↗
- Chronic kidney disease: assessment and management — Recommendations ↗
Original educational synthesis for adult first-line practice. International references must be interpreted with the clinical setting and local care pathways. Independent human scientific review remains to be confirmed.