Ganglion Impar Block Explained by a Colorado Pain Clinic

Ganglion Impar Block is a technique that is used for pain management. It involves the blockade of nerve impulses so that the chronic pain in the rectal or pelvic region can be contained. With the nerves being blocked, the pain shooting down the tailbone can be managed with ease.

                     What are the major indicators for getting a Ganglion Impar Block?

People who are experiencing perineal pains that are localized in nature and are often accompanied with burning sensations are perfect tailbone pain2candidates for getting a Ganglion Impar Block. Also, people who complain of being in pain even after their external wounds have healed will also find getting the Ganglion Impar Block a very good option to block the pain.

The conditions treated with the ganglion impar block are chronic tailbone pain, perineal pain, perianal cancer, disorders of the colon, rectum, and genitals, failed back surgery syndrome, postherpectic pain, and postherpetic neuralgia of the sacral region.

                           What does a Ganglion Impar Block entail?

A Ganglion Impar Block is basically a nerve block that is placed at the ganglion impar region.The ganglion impar that is present in front of the coccyx and sacrum joint is a collection of nerve cells that are neutralized by the ganglion impar block. However, the shape of the ganglion impar and its location is different in every patient (Oh et al, 2004). Getting to this region, however, requires the use of a curved needle that can bypass the coccyx and sacrum joint. Sometimes a physician can also insert the block by inserting the needle through this joint as well.

                How does a Ganglion Impar Block help the doctor provide treatment?

The Ganglion Impar Block is very good at suppressing the pain that is being felt by the patient. By eliminating the pain, the Ganglion Impar Block provides the Colorado pain management doctor a chance to treat the other symptoms that the patient has been experiencing. Thus, this block is quite effective in helping the doctor in providing proper treatment to the patient.

                            What to expect from a Ganglion Impar Block?

ganglion impar blockPlacement of a Ganglion Impar Block is not a very complex procedure but still when you will arrive at the procedure center, your vitals are going to be checked and the doctor is going to make sure that you do not have an infection. This is important because this procedure cannot be performed if the patient is suffering from any kind of infection.

Once it is confirmed that you do not have an infection, you will be asked to lie down on your stomach and your back is going to be positioned under the X-ray machine. To numb the skin, a local anesthetic will be injected which might sting a bit. The doctor is then going to inject the block using a curved needle while seeing the needle going in at the right place on the monitor placed in front of him.

Once the block is in place, the needle is going to be removed and a shot of steroid is going to be injected. The doctor is then going to place a Band-Aid over the portion of the skin where the needle penetrated it. This whole process is going to take no more than ten to fifteen minutes and you will be free to go home.

                       What are the risks of getting a Ganglion Impar Block?

As is the case with any surgical procedure, there are some risks involved in getting a Ganglion Impar Block too. According to Plancarte et al (1993) the wrong positioning of the needle can result in the spreading of the contrast in the in the caudal canal which can corrected by simply repositioning the needle. There is a slight risk of infection, bleeding or anesthesia complication.

                      What are the benefits of getting a Ganglion Impar Block?

The most important benefit that can be availed by getting a Ganglion Impar Block is of reducing the pain immediately. Most of the time, the patient is going to feel considerable pain relief after having undergone the procedure.

Colorado Clinic offers Board Certified pain management treatment for all types of tailbone pain and perineal pain. Both medication management and interventional procedures such as the ganglion impar block are offered at 3 locations in Northern Colorado including Boulder, Greeley and Loveland. Call us today!


Oh CS, Chung IH, Ji HJ, et al. Clinical implications of topographic anatomy on the ganglion Impar. Anaesthesiology. 2004;101:249–250.

Plancarte R, Velazquez R, Patt RB: Neurolytic blocks of the sympathetic axis. In Patt RB (ed): Cancer Pain. Philadelphia, Lippincott-Raven, 1993, pp. 419-442.