Interestingly, ganglion impar radiofrequency ablation has also been shown to produce excellent sustained perineal pain relief, similar to injection of phenol. If the initial block does not produce adequate pain relief, a different approach may be used since there may be significant variation in anatomic location of the ganglion impar between individuals.
What are the risks of a Ganglion Impar block?
The risks of a ganglion impar block are very low. There is a low risk of infection, nerve injury, or paralysis. There could also be some bleeding or an allergic reaction to the medication used. The main risk is inadequate pain relief.