A sponge that could reduce negative effects of chemotherapy

The toxic side-effects of chemotherapy could be reduced by a sponge-like device which strains leftover cancer drugs from the blood stream before they damage the brain or cause hair loss. The tubular device is 3D-printed – so it could be tailor-made to fit the patient.
Its mesh-like centre is covered with a special coating that absorbs the drug, but lets blood flow through the device unhindered. https://www.bbc.com/news/health-46782190

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