Yes, blood tests can fail.
Blood test failures are more common than many people realize, particularly with home test kits that rely on finger prick samples. It's important to understand why these failures occur and how to minimize them.
Reasons for Blood Test Failure
The provided reference specifically mentions issues with home test kits, especially those using finger prick tests. Here's a breakdown of potential reasons for failure:
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Sample Collection Errors: This is a major contributor. If the blood sample isn't collected correctly, the test may not be accurate or even possible to perform.
- Finger prick tests, in particular, can be prone to errors.
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Insufficient Sample Volume: Not enough blood collected for the test to run properly.
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Contamination: If the sample is contaminated, it can invalidate the results.
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Improper Handling/Storage: If the collected sample isn't handled or stored correctly before it's tested, the results can be affected.
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Technical Issues with the Test: While less common, there can be problems with the test kit itself.
Avoiding Blood Test Failures
To increase the likelihood of a successful blood test, consider the following:
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Carefully follow instructions: Read and understand all instructions included with the blood test kit before collecting your sample.
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Ensure adequate hydration: Being properly hydrated can make it easier to draw blood.
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Proper finger prick technique:
- Clean the puncture site thoroughly.
- Use the correct lancet device and technique.
- "Milk" the finger gently to encourage blood flow without excessive squeezing.
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Collect the required sample volume: Make sure you collect the amount of blood specified by the test instructions.
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Handle and store the sample correctly: Follow the instructions for handling and storing the sample before sending it to the lab.
