Let me pose a different example. Say there's a fire in a multi-story building. The fire-fighters rush up the narrow staircase to try to rescue 2 children on the second floor. Seconds count. At the top of the stairs they find a 300-lb woman collapsed from smoke inhalation--- and collapsed in such a position that she's blocking the door at the top of the stairs and the firefighters can't open it. They can't lift this woman, but they could push her off to the side so that she falls down to the first floor, then open the door and get the two children out of the building.
They know that this will probably result in at least bruises, probably broken bones, for the very heavy woman, and in any case it;s unlikely they could come back for the after they get the children out.
Are they justified in pushing her off the staircase?
You answer. Then I'll tell you mine.
It seems that since they have to actually push the woman to her likely death, and cannot bypass her, the firefighters must not do that in order to rescue the children.
This is a double effect question, not a more general rights question.