A spinal angiogram typically does require general anesthesia, but a local anesthetic may be used to numb the area where the catheter will be inserted. The anesthetic is usually given through an injection at the site of the catheter insertion, which may be in the groin or the wrist.
It's important to discuss any concerns or questions you may have about anesthesia or sedation with your neurointerventionalist prior to the procedure. They can provide more detailed information about the specific medications and techniques that will be used, as well as any potential risks or side effects.