Ultrasound versus fluoroscopy-guided cervical medial branch block for the treatment of chronic cervical facet joint pain: a retrospective comparative study.

Our results suggest that, compared with FL-guided CMBBs, US-guided CMBBs require a shorter administration duration and fewer needle passes, while providing similar pain relief and functional improvements. Therefore, US-guided CMBBs can be considered as an effective alternative for the conservative management of chronic cervical facet joint pain.