Patient: Description of condition (onset, main symptoms, hospital visited, etc.): My mother’s right carotid artery stenosis reached 69%, and a 64-row CT examination showed that the blood vessels between the brainstem and cerebellum had become narrowed. The doctor said that she needed to do a right carotid artery stent, but told her that there was plaque at the right carotid artery stenosis to do stenting, and it was very easy for the plaque to fall off when doing stenting, which was very risky. I read your article “Carotid stenosis and cerebral infarction” written in 2008, in which you mentioned that “During carotid stenting angioplasty, a cerebral protection device DD carotid filter is temporarily installed in the carotid artery, so that even if the plaque is dislodged during the operation, it will not enter the brain with the blood flow and cause cerebral infarction, but will be stopped in the filter. It has greatly improved the safety of the operation. It is receiving more and more acceptance from the majority of patients. “Please ask Dr. Wan: Can my mother have a carotid filter before stenting? Can the plaque at the stenosis be dislodged when the carotid filter is implanted? Is there a high chance of detachment? Is there a high risk? My mother is now recovering and has been discharged from the hospital. She is now afraid of heat and feels itchy all over her body (her skin is not red and swollen, she has no allergies, and her skin looks like a normal person). What’s wrong with her? I am eagerly awaiting Dr. Wan’s answer. Thank you! She used to be in good health. A few days ago, her left hand suddenly went numb and she couldn’t hold anything, so she was hospitalized and hooked up to an IV for 10 days to open the blood vessels. Now I have recovered and have been discharged from the hospital. Qin Jianhui, Department of Peripheral Vascular Surgery, Dongzhimen Hospital, Beijing, China: Determining the treatment plan for carotid artery stenosis is very demanding and difficult to do online. The advice I can give you is that both surgical treatment and stenting (that is, interventional) treatment are optional options, and the specific choice of which option to choose should be thoroughly evaluated and analyzed, and if stenting is chosen, a protective device is usually used. If possible, we recommend that you come to our hospital for a detailed examination and evaluation, and that may be the end of what you can do on the Internet.