Comments are from a colleague
Please note that ..
«for physicians and rabbanim there is a piece called Halakhic Guidelines for Physicians in Intensive Care Units that I have found very helpful.
Written by Prof. Avraham Steinberg, MD, a well-known talmid hacham and medical ethicist at Shaare Zedek in Yerushalayim; it appeared in Jewish Medical Ethics Vol. IV, No. 1, February 2001. The original Hebrew piece was republished a few times.
The introductory note says: "The following guidelines were formulated in consultation with the late Rabbi Shlomo Zalman Aurbach and Rabbi Shemuel ha-Levi Wosner, who reviewed the original Hebrew and gave their approval."