Applying sensor network to emergency lifesaving systems called Triage to decide priority of transportation in disasters is an active area of research. It is necessary to keep collecting data by sensors fixed in injured people. Sensors selected as relay nodes consume battery in large quantity and are easy to be out of battery in collecting the data. In addition, sensors secede from the network because injured people are transported sequentially. But sensors transported later are easy to be out of battery because of remaining in the network for a long time. So in this paper, we propose selection of relay nodes adapted to priority of transportation. Our proposal keeps the packet arrival rate and suppresses the battery consumption totally by generating multiple routes by broadcast from the sink. In addition, it suppresses battery consumption of sensors transported later by using priority of transportation. We evaluate our proposal by the simulation and show this effectiveness.