The mobile stroke unit is like a hospital on wheels, so don’t worry if it’s staying longer than an ambulance normally would — treatment is not being delayed. Inside the mobile stroke unit, stroke experts along with nurses and paramedics are evaluating the patient, getting a CT scan and doing blood tests. If needed, clot-busting medications or other treatments are started immediately. There is no faster way to do this than right at the scene of the emergency. Once a patient begins medications, the mobile stroke unit will transport them to the hospital just like a regular ambulance.