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Table 2 Microclot criteria to determine the amount of microclots in the platelet poor plasma sample.

From: Prevalence of symptoms, comorbidities, fibrin amyloid microclots and platelet pathology in individuals with Long COVID/Post-Acute Sequelae of COVID-19 (PASC)

Score

Analysis criteria

1

Very few areas of plasma protein misfolding (≤ 1 µm) visible with a few ≤ 10 µm microclots

2

Very few areas of plasma protein misfolding (≤ 1 µm) visible with scattered/mild ≤ 10 µm microclots

3

Moderate areas of plasma protein misfolding visible as microclots ≥ 15 µm

4

Severe areas of plasma protein misfolding visible as large microclots