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Objective. Current therapies for sacroiliac joint (SIJ) dysfunction offer discouraging results in alleviating low back pain. The innervation and target nerves for radiofrequency denervation (RFD) of the SIJ remain unclear. We present a prospective case series on the treatment of intractable SIJ dysfunction with pulsed radiofrequency denervation (PRFD) of lateral branches from L4–S3.

Interventions. A total of 126 patients with presumptive SIJ dysfunction based on history and physical examination underwent arthrographically confirmed steroid/local anesthetic SIJ injection. Fifty-two patients (41.3%) had >75% pain relief after two consecutive injections, physical therapy, repeated SIJ injections, and/or analgesics. Twenty-two patients failed to respond. These patients underwent PRFD of the medial branch of L4, posterior primary rami of L5, and lateral branches S1 and S2.

Outcome …