Standardized fluoroscopy-guided implantation technique enables optimal electrode placement in sacral neuromodulation:...

Area of Science:

• Urology
• Neurology
• Surgical Techniques

Background:

• Sacral neuromodulation (SNM) is a key treatment for fecal incontinence.
• Optimal electrode placement is vital for SNM treatment success.

Purpose of the Study:

• To assess the accuracy of SNM electrode positioning using a standardized fluoroscopy-guided implantation method.
• To evaluate the proximity of implanted electrodes to sacral nerves in a cadaver model.

Main Methods:

• SNM electrodes were implanted bilaterally in five lower body cadaver specimens.
• Fluoroscopy was used to mark S3, guiding electrode placement.
• Pelvic dissection was performed to determine the exact electrode positions relative to sacral nerves.

Main Results:

• Electrodes were inserted at a median angle of 60° to the skin, 9 mm from the S3 marking.
• All electrodes successfully entered the third sacral foramen.
• The median distance from electrodes to the sacral nerve ranged from 0 to 2.25 mm, with no significant differences between sides or sexes.

Conclusions:

• A standardized fluoroscopy-guided technique reliably achieves close electrode-nerve contact.
• This precise placement technique holds potential for enhancing clinical outcomes in SNM therapy.