@kana
oh :(
I'm not shure if that's helpfull to you, since I'm not so much aware of the situation in poland, but take a look if there's something similiar to this:
https://en.m.wikipedia.org/wiki/Advance_healthcare_directive
here in polski, which I cannot read:
(so maybe it says something very different from what I mean, look first at the english text maybe)
https://pl.m.wikipedia.org/wiki/Testament_%C5%BCycia