Welcome @pammlish - I did a search of Connect and wasn't able to find a member who posted about a percutaneous ultrasound-guided needle-knife surgery for a bulging lumbar disc but there is another discussion with members that may have looked into the procedure.

-- Endoscopic Lumbar Discectomy: Questions as I prepare for surgery:
https://connect.mayoclinic.org/discussion/endoscopic-discectomy-surgery-questions/
Are you thinking about having the procedure done?

I'm considering it. I'll keep you posted if I do . Please let me know if you do as well. Johnmacc