Ultrasound-Guided Ganglion Impar Injection

  • Amaresh Vydyanathan
  • Samer N. Narouze


The ganglion impar is a solitary neural structure located anterior to the sacrococcygeal joint (SCJ). It represents the fusion of the caudal end of the bilateral sympathetic chains. The ganglion impar innervates the perineum, distal rectum, anal canal, distal urethra, scrotum, distal third of the vagina, and the vulva [1, 2].


Ganglion impar injection Transanococcygeal approach 


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Amaresh Vydyanathan
    • 1
  • Samer N. Narouze
    • 2
  1. 1.Department of Anesthesiology, Department of Rehabilitation Medicine, Albert Einstein College of MedicineMontefiore Multidisciplinary Pain ProgramBronxUSA
  2. 2.Professor of Anesthesiology and Pain MedicineCenter for Pain Medicine, Western Reserve HospitalCuyahoga FallsUSA

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