Evaluation of the effectiveness of caudal epidural steroid injection as an adjuvant to ganglion impar pulsed radiofrequency therapy in chronic coccygodynia.

BACKGROUND

This study aimed to evaluate the effectiveness of adding caudal epidural steroid injection (CESI) to ganglion impar pulsed radiofrequency (GI-PRF) therapy in patients with refractory chronic coccygodynia, and to determine the effect of pain duration and trauma on treatment success.

MATERIALS AND METHODS

Forty patients who underwent GI-PRF (n = 20) or GI-PRF + CESI (n = 20) were retrospectively assessed for age, gender, pain duration, history of trauma to the coccyx, Numerical Rating Scale (NRS) pain scores pre-procedure and 1, 3, and 6 months post-procedure and satisfaction rates at 6 months post-procedure. Satisfaction was categorized as excellent, high, moderate, and low.

RESULTS

In both groups, NRS scores were significantly decreased at 6 months (pre-vs. 6 mo. post-procedure: GI-PRF [8 vs. 5], GI-PRF + CESI [8.5 vs. 3.5]; p < 0.001). The proportion of patients reporting excellent satisfaction was significantly higher in the GI PRF + CESI group (50 % vs. 15 %; p < 0.05). Patients with trauma history in the GI-PRF + CESI group had significantly lower median NRS values at 6 months compared to patients in both groups with negative trauma history (p < 0.02). Within the GI-PRF only group, patients with trauma history had significantly lower NRS scores at 6 months than those without a history of trauma (p = 0.012). Pain duration did not significantly impact satisfaction levels (p = 0.055).

CONCLUSION

GI-PRF therapy was effective in coccygodynia, especially in patients with positive trauma history, and adjuvant CESI increased patient satisfaction by providing better pain control.