A randomized comparison between ultrasound- and fluoroscopy-guided third occipital nerve block

Area of Science:

• Pain Management
• Neurology
• Medical Imaging

Background:

• Third occipital nerve block (TONB) is a common procedure for upper neck pain and cervicogenic headaches.
• Fluoroscopy is the standard imaging guidance, but ultrasound (US) offers a radiation-free alternative.
• This study compares the performance and outcomes of US-guided versus fluoroscopy-guided TONB.

Purpose of the Study:

• To compare the efficiency and effectiveness of ultrasound (US) guidance versus fluoroscopy for third occipital nerve block (TONB).
• To evaluate whether US guidance leads to a shorter procedure time.

Main Methods:

• A randomized, observer-blinded trial involving 40 patients undergoing TONB.
• Patients were randomized to either fluoroscopy or US guidance.
• Primary outcome was performance time; secondary outcomes included success rate, pain levels, sensory changes, and complications.

Main Results:

• US guidance resulted in significantly shorter performance times (212.8 vs 396.5 seconds) and fewer needle passes (2 vs 6).
• Both modalities demonstrated high and similar success rates (95%-100%) with no significant differences in pain reduction.
• Fluoroscopy showed C2-C3 intra-articular spread (15%) and vascular breach (10%), while US guidance had no reported adverse events.

Conclusions:

• Ultrasound (US) guidance and fluoroscopy provide comparable success rates for third occipital nerve block (TONB).
• US guidance offers superior efficiency, characterized by reduced procedure time and fewer needle insertions.
• Ultrasonography is a safe and effective alternative to fluoroscopy for TONB, minimizing radiation exposure.