What does "presumed consent" might presume? Preservation measures and uncontrolled donation after circulatory determination of death.

One of the most controversial aspects in uncontrolled (out-of-hospital) donation of organs after circulatory death (uDCD) is the initiation of preservation measures before death. I argue that in so-called opting-out systems only under very stringent conditions we might presume consent to the instauration of those measures. Given its current legal framework, I claim that this is not the case of Spain, a well-known country in which consent is presumed-albeit only formally-and where uDCD is currently practiced.