Q: I have a question regarding prolonging life. My mom had a stroke and the doctor insisted she'd have pain without a feeding tube. I don't believe this is true. In any case, do I have a moral obligation to have a feeding tube inserted when there's no chance of improvement?
A: If your mom is dying from the stroke, you don't need to put in a feeding tube. If she's not dying, you do need to put in the tube or risk allowing her to starve.
You face a critical medical and spiritual moment where a line divides prolonging life through clinically-approved therapeutic medical treatments (which is always the religious imperative) vs. authorizing non-therapeutic procedures whose only purpose is to postpone imminent death, which is not only not required but not permitted according to every major religious tradition.