Dr. Thomas Finegan:

On the circumstances the Senator asked about, in every case of consensual medical self-killing, there are circumstances where the patient's life is treated as a means to an end. The life is extinguished as a way of ending some sort of condition, suffering and so forth and that is always, necessarily, contrary to respecting that person and their life as valuable. My answer, therefore, is "No" on principle grounds, but that is distinct from the question of whether, within the idea that it is permissible, there is the germ of an orientation towards expansion, and I think that is clear when one tests it.

In principle, however, even in a limited case, it always involves treating that person's life as a means to an end. It always involves ultimately rejecting the idea that their life is of intrinsic, equal, inviolable worth. I think the compassionate, just and moral thing to do in that circumstance is to alleviate the person's suffering as best as one can without killing them.