According to the collected data, a modified stretcher was found. The improved four-fold stretcher has the following advantages: it can save the transportation manpower. The wheeled pull makes the moving object only need to overcome the rolling friction resistance, thus greatly improving the work efficiency. Under appropriate conditions, 1 medical personnel can carry out the transportation. It is especially suitable for the armed police force to carry out the task in the city. Because the wheels are thicker and have a more stable shock absorber, even in the rugged rural areas, you can carry a single person, and two people in the mountain area. It can improve the handling speed. Two people carrying the military four-fold stretcher bearers have a large physical consumption, short running duration and long recovery period. Because of the small friction resistance of wheel drive, the medical personnel can run for a long time, reduce physical exertion, realize rapid transportation, and win the rescue time for the heavy wounded.

Avoid secondary injury due to transport. Due to the original 2 people lift line stretcher, bumpy cannot avoid a stretcher, swinging, so as to increase the injured bone injury and wound bleeding, wheel drive is relatively flat, stable, can effectively reduce because of handling the secondary damage to the wounded. Convenient for concealed handling. In the battle, two men carried a four-fold stretcher, and the porter was only able to stand upright, and the danger was greater through the enemy fire zone. The pull-up military four-fold stretcher can be crawled to pull the stretcher forward, thus reducing the forward position, reducing the area of the stretch, and the area from the original 1. 08m2 is reduced to 0. 28m2, reduce the chance of being shot by the enemy. You can prevent the loss of items such as guns. Existing single frame without the injured gun fixed position, and easily lost, in the process of handling generations back by medical personnel, increase energy consumption, and forty percent pull military stretcher in the injured foot position with the wounded gun adhesive tape to prevent weapons from lost.

It can be seen that, after the reconstruction, the stretchable four-fold stretcher is able to carry the wounded in the gentle road and country road, and the carrying speed, carrying time and safety are obviously better than the existing four-fold stretcher. It can be widely used.