I am an ICU nurse- I was wondering how long I would need to be off after breast implants, considering how physical my job is?

I don't allow my patients to do any heavy lifting for 6 weeks.  From a pain point of view, you should be ok after a week.  You should discuss this with your PS.

Many pts return to work in3-4 days if you lift with your arms close and flexed at the elbow then you can do most things after two weeks you should be fine