Sacral neuromodulation treats bladder and bowel control problems by stimulating the sacral nerve roots, usually S3, through an electrode placed via the sacral foramen. Like spinal cord stimulation, it is tested first: a test phase with a temporary or tined lead demonstrates whether symptoms improve before a permanent generator is implanted.
At a glance
- Indications
- Urge urinary incontinence, urgency-frequency syndrome, non-obstructive urinary retention, faecal incontinence, chronic pelvic pain
- Usual target
- S3 sacral nerve root
- Test phase
- Temporary or tined-lead evaluation before permanent implantation
- Threshold to proceed
- Usually at least 50% improvement in the target symptom
- Managed with
- Urology, gynaecology, colorectal surgery and pelvic floor physiotherapy
A problem people rarely discuss
Incontinence and urgency are among the most isolating symptoms in medicine, and many patients endure them for years without being told that a surgical option exists. Sacral neuromodulation is an established treatment for patients in whom conservative management — pelvic floor training, bladder retraining, medication, and where relevant botulinum toxin — has failed.
How the treatment proceeds
- Assessment with urology, gynaecology or colorectal surgery to confirm that the problem is functional rather than obstructive or structural.
- Test phase. An electrode is placed under X-ray guidance at the S3 root. Correct placement is confirmed by characteristic responses — movement of the pelvic floor and of the great toe. Symptoms are then recorded in a diary during the test period.
- Permanent implantation. If the test produces meaningful improvement, a small pulse generator is implanted in the upper buttock and connected to the lead.
- Programming and follow-up, with adjustment as symptoms change.
What it can and cannot do
Where it works, the change is substantial: many patients move from planning their day around toilet access to not thinking about it. It does not cure the underlying neurological or pelvic-floor condition, and benefit can fade, requiring reprogramming. The test phase is again the safeguard — patients who do not respond do not receive an implant.
Training background
Prof. YILMAZ has taught sacral neuromodulation nationally, including a live sacral neuromodulation course held jointly with the Turkish Urology Academy in İstanbul, and has authored a reference chapter on sacral nerve stimulation for the Turkish Neurosurgical Society.
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Frequently asked questions
Who is a candidate for sacral neuromodulation?
Patients with urge urinary incontinence, urgency-frequency, non-obstructive urinary retention, faecal incontinence or chronic pelvic pain in whom conservative treatment has failed, and in whom an obstructive or structural cause has been excluded.
Is there a way to know if it will work before committing?
Yes. A test phase with a temporary or tined lead is performed first, and only patients who show meaningful improvement — usually at least 50% — proceed to permanent implantation.