Carotid artery procedure is done to restore proper blood flow to the brain. Blood flow in this artery can become partly or totally blocked by fatty material called plaque. This can reduce the blood supply to your brain and cause a stroke.

Hourly bandwidth consumption at rates like these can vary from : 12M to 3.4G+. Unless you are watching video over RDP, the higher end of the ladder is highly unlikely. For normal activity at 1024x768 resolution with standard settings estimated about 25M per hour.