[ekanes]

Super interesting. But is the blood then cleaned of them, or is this kind of like giving your plastics to someone else? :/

[erikpukinskis]

If I was in a need of a blood transfusion I think I’m OK with there being a normal amount of nanoplastics in them.

[ahupp]

nit, but this is usually accomplished with plasma donation (plasmapheresis) rather than blood donation. You can donate plasma much more frequently (2x/week) vs blood (once per 2 months), thought the volume taken for each is roughly similar.

[b112]

The filters used must be a specific size, so how micro, are micro plastics? If they keep breaking into smaller pieces, wouldn't they be cell sized too? And thus, pass cell sized filters?

[ahupp]

They don't filter the plasma, they remove it and replace with some other substance depending in your condition and risk profile.

[b112]

You have to filter whole blood, to get plasma.

[ahupp]

So you filter out the blood cells (45% of volume), toss the plasma (55% of volume) and return blood cells + clean plasma. Any substances the plasma are gone. So this is useful to the extent that the substances you care about are free in plasma. At least in the case of PFAS ("forever chemicals") that seems to be the case, see "Effect of Plasma and Blood Donations on Levels of Perfluoroalkyl and Polyfluoroalkyl Substances in Firefighters in Australia", which found that 52 weeks of plasma donation reduced PFAS blood levels by ~30%. This was more effective than blood donation, which reduced levels by 10% and 0% depending on the specific substances you look at.

https://jamanetwork.com/journals/jamanetworkopen/fullarticle...

[Entinel]

If I was in a situation where I needed emergency blood, the level of microplastics in it is the least of my concerns.

[brookst]

“Excuse me, did this blood come from a vegan? I couldn’t possibly accept blood that isn’t 100% organic, free range, and —-“ (transcript ends, patient died)