Click on the circle showing participants, at the top right of your thread.
If you want to leave the discussion, click on the 3 small dots near your name, then click on Leave Discussion.
At this point, a record of your presence will be kept. You will appear as a participant who has archived the discussion on their side.
If you were the last nurse in the discussion thread and you leave, the message would return to the nursing team's triage box. A nurse colleague could then take over the discussion!