@dlydailyhope Thank you. My wife is sad and scared as we all are. I'm trying to keep things positive and optimistic.

What specialists does your FIL have working with him now?
I do not know exactly what specialists are working with him, he has nurses come in and do check-ins and whatnot, as well as a PT that does a few sessions a week with him. There is a doctor who is on-site and keeps tabs on it as well.

Did he have brain damage or autonomic nervous system damage with the surgeries?
Not as far as I'm aware. My information has been just what was shared by my MIL but it didn't seem like they said anything like that to her from what I gather. They eventually did an MRI or CT scan on his chest and head but from what I heard, they didn't find anything.

How long were his surgeries? Was he under too long and did they have complications in surgery (was he deprived of oxygen too long)?
From the time they took him from the room to bringing him back, it was around 6 hours. I don't know if that is long or not and as far as I know they did not disclose any issues with oxygen, etc to my MIL.

I would want to get information on pre- and post- surgery functioning of heart and lungs. Does he show improvement of blood and oxygen flow? Was the surgery considered a success? If not, why?
My understanding is that the surgeries were considered successful, though his carotid surgical area has been problematic in healing - they've had to keep it bandaged up and I think do some scraping to keep it clean/etc. He's also developed some bed sores which is another thing his body is having to fight. I believe his heart is doing well, just issues with his lungs (had several bouts of aspirating - first was shortly after surgery they tried a swallowing test but stuff got in his lungs, other times he has vomited and got stuff in that way). His O2 has been up and down. I believe he's been able to breath without supplementary on several occasions but then setback happens and then has to get put back on it.

Did they warn him and your MIL about the risks of the surgery?
I don't know exactly how it transpired, but they asked them if they wanted to do both surgeries at the same time. I've come to find that with other folks we know who have had similar surgery needs, they have always done the surgeries separate and allowed time for recovery between them (carotid first, then heart bypass). I feel that maybe the doctors did not explain the elevated risks of doing both at the same time or perhaps undersold the heightened risks.

Did he have any clots that formed during/after surgery that caused blockages of blood and oxygen flow?
After surgery they found a clot in his lower leg and used meds to get it to clear up from my understanding. It was causing his leg to swell and be painful. Other than that I'm not aware of any others.

I'm going to try to get some additional info when/where I can. Mayo is regarded as world class and probably has better experts than what he is getting at his current facility. I just want to make sure he is getting the best care possible and if there are any tools or resources to pull in, I want to try to get those involved if possible - I just don't know what is out there.