As Glen said (above), there are lots of factors that determine time to return to work, however the following is my experience.
The surgeon told me ahead of time that I would be back to work in 2-3 weeks. I actually returned this past Monday (2-1/2 weeks post-op) and stayed for 6-7 hours per day. I have an office job, but had no problem driving 45 minutes each way to work. I expect to be full-time next week and would have no problem taking a longer business trip.
I didn't tell everyone in the company, but I was quite open with the people I know best plus with those above me.
Just my experience -