I just realized why I used the image of a scalpel's edge. It's because I had what is called "out-patient surgery" on Monday morning. The answer to your question is: Hernia repair, although I didn't think my hernia needed any repairing. It seemed to be doing just fine on its own.
What I wanted was the hernia-be-gone surgery.
When I heard that it was "out-patient surgery" got it in my mind it was like going to the dentist: A couple of Novocaine shots some drilling, rinsing, and spitting, then drive home.
Outpatient surgery: A few shots, zip, zap, zoom thank you for stopping by; pay the lady on your way out.
Well, let me tell you: Does the phrase "general anesthesia" mean anything at all to you?