Do you have 1 MA or 2? Or one per doctor? Assuming there is a small desk (or flat surface) in each exam room, you can assign a laptop to each MA. That's less expensive than buying a PC for each room. Of course, you would then need a laptop to bring into the room for your use, so you still need that flat surface (and maybe a chair). Now, the MA can room the patient, take the vitals and input them and forward the chart to the appropriate doctor. Then take the laptop with her to work on the next patient, or any other work she needs to do.
Setting up a wireless network to connect the laptops is pretty pretty easy. But it may be more reliable if you have cables run t each room so that you can plug the laptops into the network by cable.