What does blood test unsuitable mean?

When a blood test is marked as "unsuitable," it generally indicates that the sample collected or received at the laboratory is not adequate for performing the requested tests or providing reliable results. Here are a few reasons why a blood test may be considered unsuitable:

1. Sample Hemolysis: Hemolysis occurs when red blood cells break down and release hemoglobin into the plasma, leading to a reddish discoloration of the sample. Excessive hemolysis can interfere with certain tests, such as those that measure electrolytes, enzymes, or proteins, and can affect test accuracy.

2. Insufficient Sample Volume: If the blood sample collected is insufficient to perform all the requested tests, the laboratory may mark the test as unsuitable. This can happen when the blood draw was unsuccessful, or the sample was lost during processing or transporting.

3. Improper Blood Collection: If the blood collection procedure is not followed correctly, such as using the wrong collection tube, not properly mixing the blood, or allowing for clot formation, it can compromise the integrity of the sample and make it unsuitable for testing.

4. Sample Coagulation: Blood samples for certain tests need to be collected in tubes with anticoagulants to prevent clotting. If the sample clots, it becomes unsuitable for tests that require the analysis of the liquid plasma or serum, as the clot may interfere with the testing process.

5. Sample Contamination: If the blood sample comes in contact with any foreign substances, such as dirt, water, or other chemicals, it can lead to contamination and affect the accuracy of the test results.

6. Processing or Storage Issues: Improper storage or handling of blood samples can also make them unsuitable for testing. For example, samples that are exposed to extreme temperatures or not refrigerated properly may deteriorate and become unsuitable for analysis.

When a blood test is deemed unsuitable, the laboratory will usually notify the doctor or healthcare provider, who will decide whether to repeat the test or request alternative tests to ensure accurate results and proper patient care.