Dear Dr. Najafi, I am 68 years old, due to genetic issue my blood Lipoprotein is very high (over 300), I had arterial bypass 15 years ago(5 maim arteries to the heart). I had a doppler sonography lately. There is more than70% blockage at the left neck artery right before branching to the brain as per attached report. In the meantime I appreciate ,if you kindly reply my below question: Do you have the facility to insert stain with a protection umbrella? What is your solution regarding this matter? Your prompt reply is highly appreciated. Best regards, Darvish