question about repairing nicked artery

a question for the medical people ....
a friend of mine had an endoscopic endonasal pituitary macroadenoma resection to remove a pituitary gland tumor. During the procedure, the surgeon nicked his cartoid artery. They removed the tumor and packed up the cavity, and transported him to another hospital to repair the nicked artery.

My questions:
- how is a nicked artery repaired? Are there specialized equipment and techniques for repairing it? (I'm surprised they moved him to another hospital for the artery repair since the hospital where the surgery was done is a pretty advanced and well-known facility.)
- how stable will this artery be after repair? Is there danger of an aneurysm forming at the site since that wall has been weakened?
- what sorts of things should he be vigilant about in the short- and long-term?

I did a google search but found very little info about this -- a bit surprising since i google a lot of medical stuff, and usually find what i need to know.

And if they do, that portion will be stronger than the rest of the artery.

for a bad nick they would also use a vascular external mesh wrap at the point of the tear or nick. Internal stents are not an option since the larger arteries would be difficult to stent and I don't know of any products for this use. Many years ago I worked on an internal "stent" for descending aortic aneurysms and there were too many problems with it and all ended up being removed at considerable risk to the patients. Today they use a special external mesh wrap.