|Don't do this.|
The fact that this needs to be discussed at all makes me sad, which inspired me to share some pearls.
Not sure which of these I learned from Scott Weingart specifically (most likely: all of them). Special thanks to Scott for teaching me to fix patients without torturing them.
(nb - I'm going to use the terms "sedation" and "sedative" even though the first line should be analgesia. see EMCrit 21)
Here are 3 simple things that I do to not torture my patient:
1. Sedation is an RSI med
Ask for your sedative the same time you ask for your RSI meds.
If you're planning on intubating a patient, it should be no surprise to you that very soon you will have an intubated patient that requires sedation.
This is easy.
"Can you please get me 100 mg of roc, 100 mg of ketamine, and a fentanyl drip?"
2. Paralysis is NOT sedation
Just because your patient is sitting there calmly does not mean they are comfortable, particularly if you have given them a paralytic. This is relevant in 2 ways.
a) If you used roc to intubate, your patient is paralyzed for some time, so remember to sedate them.
b) Don't use paralytics as post-intubation sedation.
"10 of vec" is NOT a sedative. Don't use it. Forget that it exists. It makes your life easier but is unequivocally terrible.
I won't say "never" because there are a few RARE circumstances where paralysis may be necessary in the intubated patient. Namely, this is at the very end of the algorithm for the ultra-severe asthmatic, and certain special circumstances of ventilator-dyssynchrony. But in both of these cases, your patient should be sedated FIRST and DURING paralysis.
If you're not really sure what I'm talking about here (and even if you are) then make sure you talk to an intensivist before you use paralytics here; or (more likely): NEVER use paralytics for the already-intubated patient.
3. Don't use pain as a pressor
see: EMCrit - Pain and Terror as Effective Pressors
The ETT comes with sedative, period. Treat the blood pressure as you would anyone else -- resuscitate, add pressors, or dial down PEEP (you actually have one more option than in the non-intubated patient).
2 options to maintain MAP in the hypotensive intubated patient:
a) no pressor, no sedative, yes torture
b) yes pressor, yes sedative, no torture
If you're not sure which of these is a better idea then... well I don't have a polite way to end this sentence.