Robert Moghim MD
Anchor Healthcare
SI Nerve Block
1746871623
An SI nerve block relieves pain from the sacroiliac (SI) joint, located in the lower back where the spine meets the pelvis. It helps with chronic lower back pain, sciatica, and discomfort in the buttocks or hip region, especially when other treatments fail.
During the procedure, a local anesthetic like lidocaine and a steroid are injected near the middle cluneal nerve, which transmits pain signals from the SI joint. Blocking these nerves can reduce inflammation and improve mobility. X-ray or ultrasound ensures precise needle placement. If successful, radiofrequency ablation (RFA)—using heat to disrupt pain signals—may offer relief for six months or more.
This procedure is done under local anesthesia, so you’ll be awake but the area will be numbed. Sedation is available if you’re anxious, but general anesthesia isn’t necessary. You may be advised to avoid eating or drinking (NPO) before the procedure based on your provider’s guidance.
You might need to stop certain medications, especially blood thinners, to reduce bleeding risks. After the procedure, rest for the day and avoid heavy lifting or strenuous activities for at least 24 hours. Some soreness is normal, and ice packs can ease discomfort.
Recovery is quick. You may feel immediate relief from the anesthetic, lasting several hours, while the steroid takes a few days to fully work. Successful procedures can provide relief for months and may be repeated every six to twelve months if necessary.
If SI joint pain is affecting your mobility, a nerve block may be a step toward relief. Consult your medical team about this treatment or other options like RFA or advanced pain management techniques.
FAQs
How is the SI nerve block procedure performed?
During the SI nerve block, a local anesthetic and a steroid are injected near the middle cluneal nerve, which conveys pain signals from the SI joint. The procedure uses X-ray or ultrasound guidance to ensure precise needle placement. If effective, radiofrequency ablation (RFA) may be considered for extended pain relief.
How long does the pain relief from an SI nerve block last and can it be repeated?
Immediate relief from the anesthetic can last several hours, while the steroid’s effects typically become noticeable within a few days and can provide relief for months. If effective, the procedure can be repeated every six to twelve months to maintain pain control. Radiofrequency ablation, if performed, can offer relief for six months or more.
What are the possible risks and side effects of an SI nerve block?
The procedure is generally low-risk but can result in temporary soreness at the injection site. There’s also a rare chance of infection, bleeding, or nerve damage. Patients might experience a localized burning sensation during the injection. Allergic reactions to the medications used are also possible, but uncommon.
What is an SI nerve block and why is it performed?
An SI nerve block is a medical procedure used to relieve pain originating from the sacroiliac (SI) joint, where the spine meets the pelvis. It is primarily used to address chronic lower back pain, sciatica, and discomfort in the buttocks or hip region when other treatments have not been successful.
What should I expect before, during, and after an SI nerve block?
Before the procedure, patients may need to fast and stop certain medications, particularly blood thinners, to minimize bleeding risks. The procedure is performed under local anesthesia, with optional sedation if needed. After the procedure, patients are advised to rest and avoid heavy activities for at least 24 hours, though recovery is typically quick.