Melanie,
Wireless isn't that slow. It will certainly be on your doctor's computer by the time he or she opens it up.
My question is given the scenario you describe, each nurse would have to be working with the same doctor or they wouldn't know who to send the chart to. If that is the case, then what is the need for the laptops? Why not just have the MAs doctor use the desktop? Seems way more logical to me.