The BBB\'s (Blood Brain Barrier) width is 38-64 nm (Thorne RG, Nicholson C. In vivo diffusion analysis with quantum dots and dextrans predicts the width of brain extracellular space. Proc. Natl Acad. Sci. USA103(14),5567'5572 (2006)). The size of the
PMMA beads for metacrill/Newplastic range from 0.2-60/0.2-70 micrometers, 1 micrometer = 1,000 nm (nanometers). So based upon the particle size I feel that a stroke caused by rouge
PMMA beads is unlikely, but in human health and science, there are always statistical outliers. It extremely hard to rule out the impossible because there is inconsistent size of these bead particles. If 90% were 40-50 micrometters, maybe we\'d be in the clear, but the manufacturing process seems to be the only flaw here. I\'d really like to see how
PMMA beads are made and what quality control tests are conducted by the bioengineering company to ensure top product quality. I think I had these same questions when we had EP around, not much progress in these last few years.