Imagine: you need a surgery and have to go to hospital. But because the beds don't have wheels and you can't be transported, the operation simply takes place in a three-bed room.
Conclusion: Sometimes, when someone is ill, things need to happen quickly, and the quickest way is on wheels. That is why wheels are indispensable in hospitals.
Hospital bed castors are controlled as a complete set of castors (4 castors) using just one pedal. The central system allows both the direction to be locked for increased directional stability and total locking.