Table 1. Comparison of Injection Techniques.

Study (y)	Groups Studied and Intervention	Results and Findings	Conclusions
Inferior hypogastric plexus block affects sacral nerves and the superior hypogastric plexus (2012)	Transsacral fluoroscopic technique	Looked at five cadaveric studies to see distribution of methylene blue dye spread (blockage distribution) via transsacral approach.	Analgesia can be achieved through a transsacral fluoroscopic technique for inferior or superior hypogastric plexus blockades. Altogether, the sympathetic inferior hypogastric nerve blockage is safe and effective for modulation of pelvic visceral pain.
Inferior hypogastric plexus blockade: A transsacral approach (2007)	Transsacral fluoroscopic technique	The technique for inferior hypogastric plexus block via sacral foramen is described with 15 blocks per 11 patients.	With proper understanding of sacral anatomy, expert needle steering techniques, and fluoroscopy expertise, this block can be performed safely and effectively.
Inferior hypogastric plexus block (2018)	Transsacral fluoroscopic technique	Review of the two main approaches: Transsacral and coccygeal.	Despite the possibility of rectal puncture, the newer coccygeal approach has less disadvantages.
A new technique for inferior hypogastric plexus block: A coccygeal transverse approach-a case report- (2012)	Coccygeal transverse approach	Presentation of a case report where coccygeal transverse approach was performed.	The new coccygeal transverse approach allows for easier inferior hypogastric plexus access and can be used for diagnosis and treatment of lower pelvic viscera.