Final answer:
Deliver the additional shocks as ordered by the physician without stopping CPR, as this is in line with the functionality of modern AEDs equipped in ambulances.
Step-by-step explanation:
When a medical direction physician orders the delivery of additional shocks to a patient in cardiac arrest while en route to the hospital, you should deliver the shocks without stopping CPR. Modern automated external defibrillators (AEDs) are designed to analyze the patient's heart rhythm and administer shocks with the appropriate energy and waveform. It is crucial to continue CPR during this process to maintain blood flow to the patient's brain and other vital organs until a normal heart rhythm is restored. Moreover, ambulances are typically equipped with these devices, enabling paramedics to provide this lifesaving treatment on the move.