I had many general anesthesias for orthopedic problems (compartment Syndrom/fasciotomy including wound healing problems and surgeries at my feet) and several local anesthesias, including the surgery in which I got a port 9 months ago. No problems at all with the anesthesia.
Before the first "planned" surgery I asked my doctors. They said, that SCLS should not be a problem. Of course, they cannot give a 100% guarantee, because no one knows much about SCLS.