Why are some medical devices so expensive?

Because of technology monopoly, like Apple and Google, other channels can't produce that kind of automatic analyzer. Now the instruments are basically put in hospitals by foreign-funded enterprises, and hospitals won't pay for them. What is expensive is those consumables and reagents, but the reason why foreign investors put instruments is that instruments and consumables are corresponding, and A-brand machines cannot use B-brand reagents, which is a technological monopoly.