It concerns doing well and avoiding harm. The nursing code of ethics is a great resource to follow when faced with ethical dilemmas. In the Marianne case study, it states that she has no advance directives, but her husband wants to try everything and the children believe that Marianne would not want to undergo surgery only to be kept alive with poor quality of life. An advice that nurse may give to Mariannes family is to help them be aware of the result of the medical procedures.
Mariannes husband needs to know that once she undergoes surgery there is a good chance that they will need to have some lifestyle changes. As nurses, we should be able to provide the family with an objective view of the importance of each action as well as provide some emotional support that Mariannes family need to deal with to their current situation. In the second case, with Nurse Jane having witnessed acts of negligence from her olleague, there may be things to consider that might make Nurse Janes decision.