I can’t help, but I killed off one of my characters in an ICU and in the end I Googled like mad and just made it up. Sounds glib, but enough Google research should give you sufficient to write something plausible. The odd ICU doctor might read it and huff and puff a bit, but I do question whether you need as much specific information as you think.

Unless of course you are writing something like a crime thriller which hinges precisely on the ICU situation, in which case I can see you might very well need specifics to make the whole thing work.

Good luck.

Emma, I agree with Bella about googling and making some of it up unless you’re writing crime and need more detail.
On the other hand, you could write a polite letter to your local hospital and say that you’re a new novelist and would very much like 10 minutes of someone’s time to inform you about the specifics in order to not misrepresent doctors and current medical practice through ignorance. Say you’ll mention the hospital in your acknolwledgements and maybe make a small donation to the medical charity of their choice. And tell them that you don’t need the name of patients, so you wouldn’t cause the families any grief.

I hope that helps.

Hi Emma,
Are you in the UK? These NICE guidelines may be helpful. I’m a medic by training, though no longer working as one. Not experienced in ITU care, but I do know a lot of the jargon. Let me know if there’s anything you don’t understand, and I’ll do my best to help.

https://www.nice.org.uk/guidance/QS13