Oh, didn't know that undetectable can be 3. Thanks.judielaine wrote: Actually, the lab i use records "undetectable" for 3 and below. They may know that the 10% difference from one source didn't apply to their lab counter.
A 10 % inaccuracy at platelet count 10 is just 1. It could be one off. Now, 5 to an actual of 0 would be a 100% inaccuracy. A 0 is much worse than 5, because a 0 suggests no clotting factor at all. A 5 could suggest some super-platelets that could get the job done. Not saying that your hematologist didn't suggest otherwise, but I would feel much better about a 5, than a 0. AI agrees, or at least when I just asked. I have yet to see less than 5, though, so...judielaine wrote: Yes, the measurements have a margin of error and, joy, it's different at different ranges. I've been in the single digits (well, single thousands) and variations in that range (undetectable vs 5, for example) weren't considered significant byt the hematologists. One thing i read gave an uncertainty of 4% above 50k, 10% below, with a bias towards over counting in the low range.
If the 4% is right, it seems your numbers still indicate increase.
Also, ITP patients have more natural variability. So a regular series of measurements of an ITP patient will have the variation due to the equipment and due to the natural variation.
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