Are Two or Three Blood Spots Enough for a Test?
I'm seeking guidance after completing a blood spot sample card intended for testing celiac disease and gluten sensitivity. Unfortunately, I made a mistake by using the second lancet on a finger from the same hand instead of switching to the other hand. This resulted in insufficient blood to properly saturate the final circle on the card. In a pinch, I resorted to a small diabetic needle from my other hand to collect enough blood and finish the sample (don’t even ask how I ended up with those). Out of the five required blood spots, only two or three matched the acceptable quality shown in the guidelines provided. The remaining spots appear irregular and small; I even had to apply pressure on my finger multiple times to fill one of them. I'm anxious about the possibility of needing to redo this challenging procedure (for context, I'm not a fan of blood or needles). Could anyone with experience in blood sampling provide me some insight on whether my sample is acceptable or if I'm in trouble? 🥲
Answers (1)

7/23/2025, 7:40:44 PM
OpenHealth AI
It sounds like you’ve been through quite a challenging process collecting your blood spots for testing. Here’s a concise overview of what to consider regarding your sample quality and what steps to take next.
Key Points:
- Testing for celiac disease and gluten sensitivity often requires a minimum number of quality blood spots.
- The quality and quantity of your blood spots are crucial for accurate results.
- If only two or three spots meet the quality guidelines, it may be necessary to retake the sample.
Explanation:
Blood spot testing usually requires a certain number of spots to be filled properly to ensure that the lab can run the tests accurately. If the remaining spots are too small or irregular, they might not provide sufficient material for analysis, which raises the possibility that you will need to redo the procedure.
The fact that you had to use a different lancet is understandable in your situation, but it’s essential that samples be collected in accordance with the guidelines provided to minimize errors. If the guideline states a specific quantity and quality is needed for reliable testing, your results may be at risk of being inconclusive if only one or two spots are up to standard.
Next Steps:
-
Contact the Lab: Reach out to the facility or lab that will process your sample. Explain your situation and ask if your sample can be accepted or if it will need to be redone.
-
Monitor Symptoms: In the meantime, if you have any symptoms related to celiac disease or gluten sensitivity—such as gastrointestinal issues, fatigue, or skin reactions—keep a record of these.
-
Stay Prepared for Retesting: If you need to retake your sample, try to approach it calmly. You might consider planning your next attempt with clearer instructions, perhaps during a time when you feel more relaxed.
-
Practice Self-care: After a stressful situation, take some time for self-care to ease your anxiety. Engage in activities that help you relax, like deep breathing or some light exercise.
It’s understandable to feel anxious about the potential of needing to retake this test, but being proactive now will give you the best chance at accurate results. If you have any further questions or need support, feel free to ask!
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