How well all of us here know, cantleave.
Apart from this issue of permitting/denying blood treatment, the rights of patients in refusing medical treatment and tests in general is a vast subject. Below is information that is helpful to me as I deal with health matters:
As a matter of ethics and the law, adults who understand the consequences of their choices may decline any and all medical tests and treatments, even life-saving treatments. In part, this consensus emerged as a reaction against paternalistic medicine, in which physicians made the final decisions about treatment for patients. As a matter of respecting the importance of choice, contemporary medical ethics counsels against imposed tests and treatments. Adult patient are usually better situated than healthcare professionals - who may not know them well at all - to understand what medical tests and treatments mean in their lives. For similar reasons, the law treats unwanted treatment as battery, a kind of wrongful touching. http://www.uic.edu/depts/mcam/ethics/refusal.htm
Your post is appreciated.
CoCo