Though OTs are not involved professionally in end of life ICU conversations, the findings in this article, seem likely to relate to the entire health care spectrum. The article is "Hard Decisions in the ICU" and it highlights factors that may ease the burden for family members who are making tough, potentially end of life, decisions for ICU patients.
The article cites a study recently published in Critical Care Medicine that, not surprisingly, concludes "Better-quality clinician–family communication was associated with both more confidence among family members to act as surrogates and a shorter duration of use of life support among patients who died."
While the study's findings and the article are specific to the ICU, one would suspect that better communication between patients/families and health professionals would likely be associated with better healthcare delivery across the treatment spectrum. The findings likely carryover to your OT practice.