My father is 86, has had two gallbladder attacks. Doc says they cannot do surgery arthoscopically, so the old fashhion way. He is very weak, has had stroke at 78 years old, cognitively dimished in the last 4 months, remembers very little and will state that as well. He has high blood pressure, so meds for that. He doesn t have enough strength to walk on own, just got him a walker. Seeing a p.t. to improve body strength. So, should he risk having the surgery or ???