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Sacral neuromodulation: sacral anatomy and optimal lead placement
Whitney K Hendrickson1, Cindy L Amundsen2
1Division of Urogynecology, Department of Obstetrics and Gynecology, Duke University Medical Center, 5324 McFarland Drive, Unit 310, Durham, NC, 27707, USA. whendric09@gmail.com.
Introduction And Hyposthesis:
To develop an instructional video that correlates cadaveric anatomy with fluoroscopic images to assist in conceptualization of optimal placement of the foramen needle and lead to complete an efficient and successful sacral neuromodulation (SNM) procedure.
Methods:
A SNM procedure was performed and recorded on a fresh female cadaver. Fluoroscopic images were obtained during the procedure to highlight the bony relationships to the S3 foramen and nerve. Dissection of the anterior and posterior sacrum was completed to highlight the tract of the S3 nerve. Techniques to increase the likelihood of optimal foramen needle and thus lead placement were highlighted.
Conclusions:
This video demonstrates how achieving optimal foramen needle placement within the S3 foramen is key to optimal lead placement. Understanding the relationship of the bony landmarks on fluoroscopy to the S3 nerve and foramen, seen in the cadaveric dissections, are important in understanding how to achieve optimal lead placement. This optimization should lead to decreased operating room time, maximization of programming options, and decreased amplitude requirements.
