Why there are only trolleys but not stretcher carts in hospitals

The stretcher trolley as a new type of medical car, can be easily used with different general hospital beds. The reason why there are only trolleys and no stretcher trucks in hospitals is because stretcher trucks, as a new type of medical car, can be easily used with different general hospital beds. The carts used in hospitals are called mobile stretcher trolleys. Stretcher car as a new type of medical car, can be easily used with different general hospital beds, in order to reduce the patient's pain index and medical convenience index, there have been many improvements.