Questions about medical hypodermic needles: 1. Under what circumstances are needle filters used? 2,Are there any needles with direct filtration function in the market at present?

Injectable needles with filtration membrane can filter out the residue of medicine, rubber crumbs, glass chips and other impurities that are invisible to the naked eye when extracting medicine, so as to avoid these impurities from entering the bloodstream to form thrombus, which is harmful to human health. Medela has a syringe needle with filter membrane, you can go to their side to learn about it, the company's address is in Yangzhou, Jiangsu Province.