Sacrospinous Fixation for Pelvic Organ Prolapse

Sacrospinous fixation is a vaginal surgery that anchors the top of the vagina (or the cervix, if the uterus is kept) to a tough band of tissue deep in the pelvis called the sacrospinous ligament, restoring support that has been lost to pelvic organ prolapse. The procedure has been performed for decades and remains one of the most commonly used native-tissue repairs, meaning it relies on your own tissue and sutures rather than synthetic mesh implants. While success rates are generally good in the short and medium term, the picture becomes more complicated at the five- and ten-year mark, and how the procedure stacks up against alternatives depends on which outcomes you prioritize.

What the Procedure Actually Involves

The entire operation is done through the vagina, so there are no abdominal incisions. A surgeon makes a cut along the back wall of the vagina and separates the tissue layers to reach the deep pelvic space on one or both sides. By working alongside the rectum, the surgeon reaches the ischial spine, a small bony landmark you can feel from inside the pelvis. The sacrospinous ligament runs from this spine toward the sacrum (the triangular bone at the base of your spine), and that is the anchor point.

Sutures are passed through the ligament about two centimeters toward the center from the ischial spine. That specific placement matters because the pudendal nerve and internal pudendal artery run right at the ischial spine, and placing sutures too far laterally risks injuring them.¹ The sutures are then threaded through the vaginal wall at the point that will become the new top of the vagina. When tied, these sutures pull the vaginal apex up against the ligament. Over the following weeks, the tissues fuse together, and the vault stays suspended.²

Most surgeons fix to the right side only, because the rectum retracts more easily in that direction and it allows a right-handed surgeon to work more comfortably. Some surgeons perform bilateral fixation, attaching to the ligament on both sides. Studies comparing the two approaches have found similar anatomical results, with cure rates in the mid-80s to high-90s percent range at six months regardless of whether one or both sides were used.³ An earlier cohort comparison found about 90% cure with unilateral fixation and about 86% with bilateral, a difference that was not statistically meaningful.⁴

The Anatomy That Keeps Surgeons Cautious

The sacrospinous ligament sits in a neighborhood crowded with nerves and blood vessels, and understanding that anatomy is a big part of why the procedure takes training to perform safely. Cadaver studies have mapped out these structures in detail. Nerves from the lower sacral spine (S3, S4, S5) cross over the front surface of the ligament at its midsection. The pudendal nerve and the third sacral nerve tend to run along the upper border of the ligament at roughly its midpoint.⁵ On the arterial side, the internal pudendal artery passes behind or just medial to the ischial spine, while the inferior gluteal artery exits just above the ligament, with a median distance of roughly 16 millimeters above it in one study and about 24 millimeters from the ischial spine in another.⁶

The practical takeaway is that the lateral third of the ligament (closest to the ischial spine) is the most dangerous zone because it houses the pudendal nerve and the nerves supplying the pelvic floor muscles. The medial third carries the fourth sacral nerve. Sutures placed about two centimeters medial to the ischial spine sit in the safest zone, threading the needle between these structures.

How Well Does It Work Over Time

Short-term results look encouraging. Most studies report objective cure rates (meaning the anatomy looks well-supported on examination) in the mid-80s to mid-90s percent range within the first year or two. A large series of 453 patients followed for a mean of about five and a half years reported an overall objective cure rate of roughly 83%, with about 18% of cases meeting recurrence criteria over a cumulative ten-year follow-up.⁷ Among those recurrences, prolapse of the front vaginal wall (cystocele) was the most common, followed by apical prolapse and then posterior wall prolapse.

A smaller study specifically looking at ten-year outcomes found a much higher anatomical recurrence rate of about 57%, with the front wall again being the main culprit. But even in that study, only about a third of patients reported bothersome symptoms from the recurrence, and just two of thirty patients needed another surgery.⁸ That gap between what a doctor measures on exam and what actually bothers you is a recurring theme in prolapse research. An anatomical recurrence on paper does not always translate to symptoms you notice or care about.

A medium- and long-term analysis reported an overall recurrence rate of about 22% and a complication rate of about 10%, describing the results as sustainable with low morbidity.⁹ So when you zoom out across the literature, recurrence rates range widely depending on how strictly it is defined, how long people are followed, and whether you are counting what shows up on an exam or what the patient feels.

How Sacrospinous Fixation Compares to Sacrocolpopexy

The main rival procedure is sacrocolpopexy, which uses a strip of mesh to attach the top of the vagina to the front of the sacrum. It is typically done through the abdomen, either open or with a laparoscope. A meta-analysis pooling data from multiple studies found that sacrocolpopexy had a modestly higher success rate (about 91% versus 88% for sacrospinous fixation) and a lower recurrence rate (about 8% versus 12%). Sacrocolpopexy also came with lower rates of painful intercourse. On the other hand, sacrospinous fixation took about 25 minutes less in the operating room, had lower rates of bleeding, wound infection, and gut-related complications.¹⁰

A separate comparison of bilateral mesh-augmented sacrospinous suspension versus laparoscopic sacrocolpopexy found significant advantages in the sacrospinous group for operative time, blood loss, catheter time, and hospital stay, with no recurrences in either group during follow-up.¹¹ When looking at cost, sacrocolpopexy runs more expensive upfront but may be cost-effective when factoring in higher quality-adjusted life years. One analysis pegged sacrocolpopexy at about $14,000 versus about $12,000 for sacrospinous fixation at two years, with sacrocolpopexy offering a slight effectiveness edge.¹²

The choice often comes down to the clinical situation. Sacrospinous fixation avoids the abdomen entirely, which is valuable if you have had multiple abdominal surgeries or have conditions that make general anesthesia riskier. Sacrocolpopexy may be preferred when durability is the top priority, particularly in younger, more active patients.

Sacrospinous Fixation Versus Uterosacral Ligament Suspension

The other common native-tissue alternative is uterosacral ligament suspension, which reattaches the vaginal top to the remnants of the uterosacral ligaments higher in the pelvis. A systematic review and meta-analysis found no meaningful difference between the two procedures in surgical success, anatomical outcomes, recurrence rates, or total complications.¹³ The OPTIMAL trial, a large randomized clinical trial comparing the two, found that by year five, the estimated surgical failure rate was about 62% for uterosacral suspension and about 70% for sacrospinous fixation, a difference that was not statistically significant.¹⁴

Those five-year failure numbers may look alarming, but they use a composite definition of failure that includes any measurable anatomical descent beyond a certain threshold, even when a woman has no symptoms. By stricter symptom-based definitions, far fewer patients actually feel that something has gone wrong. Still, the high composite failure rates for both procedures at five years underscore a reality of prolapse surgery: no technique guarantees permanent correction, and many patients will develop at least some measurable recurrence over time.

Complications and What to Watch For

The most talked-about risk specific to sacrospinous fixation is buttock or leg pain caused by the suture irritating or entrapping the pudendal nerve or other nearby nerves. This usually presents as a deep, burning pain in the buttock that can radiate down the back of the leg. In most cases it resolves on its own within weeks as inflammation settles. When it does not, removing the offending suture is effective: one study of 21 women who underwent suture removal for persistent pain found that 95% reported pain reduction, and 57% became completely pain-free.¹⁵

Serious bleeding is uncommon but can be life-threatening when it happens, with reported rates between about 0.2% and 2%. An arterial bleed can develop even when the operation itself appeared uneventful, sometimes forming a delayed hematoma hours later.¹⁶ Venous bleeding from the pudendal plexus can sometimes be controlled with direct pressure and clotting agents, while arterial bleeding from vessels like the inferior gluteal artery may require embolization, a minimally invasive procedure in which a radiologist blocks the bleeding vessel from the inside.¹⁷

The most common long-term problem is anterior wall recurrence. One study identified sacrospinous fixation itself as a strong risk factor for cystocele recurrence, alongside pelvic floor muscle damage and a family history of prolapse.¹⁸ The thinking is that pulling the vaginal top toward the back of the pelvis (toward the sacrum side) may expose the front wall to more pressure, essentially trading one prolapse for another. This is a recognized trade-off, and many surgeons perform a front-wall repair at the same time to reduce that risk.

Keeping the Uterus in Place

Traditionally, sacrospinous fixation was done after a hysterectomy, anchoring the remaining vaginal cuff. But there is growing interest in using the same technique to suspend a prolapsed uterus without removing it, a procedure called sacrospinous hysteropexy. A multicenter randomized trial found that sacrospinous hysteropexy was non-inferior to vaginal hysterectomy for preventing bothersome recurrence of the top of the vagina, with 0% apical recurrence with bothersome symptoms in the hysteropexy group versus 4% in the hysterectomy group at twelve months. Overall anatomical recurrences, quality of life, complications, and sexual function did not differ between the two groups.¹⁹

Another comparison found that uterus-sparing bilateral sacrospinous hysteropexy yielded outcomes similar to hysterectomy combined with bilateral sacrospinous fixation in terms of both anatomy and function.²⁰ Sacrospinous hysteropexy also tends to involve shorter surgery time, fewer days in the hospital, and less blood loss compared to hysterectomy-based repair.²¹ For women who want to preserve their uterus, whether for fertility, personal preference, or to avoid the risks of hysterectomy, this is a meaningful option.

Sexual Function After Surgery

Concerns about sex after prolapse surgery are common and reasonable. The evidence on sexual function after sacrospinous fixation is mostly reassuring. Sexually active patients have generally reported either improvement or no change in sexual function after surgery, with the exception of cases where vaginal narrowing occurred.²² A study specifically evaluating sexual domains found that function rated well across desire, arousal, lubrication, orgasm, satisfaction, and pain, with new-onset painful intercourse in a small number of patients that resolved after suture removal in most cases.²³

That said, the meta-analysis comparing sacrospinous fixation to sacrocolpopexy did flag a higher rate of painful intercourse (about 14% versus 5%) in the sacrospinous group. Women who had repeat surgery using bilateral sacrospinous fixation for a second recurrence of vault prolapse showed improvement in validated sexual function scores afterward.²⁴ If your prolapse itself is causing problems with intimacy, correcting it with sacrospinous fixation is more likely to help than hurt. The risk of vaginal narrowing or persistent painful sex exists but appears to be low.

Instruments and Suture Choices

Passing a suture through the sacrospinous ligament deep in the pelvis is technically demanding. Over the years, several specialized instruments have been developed to make this step easier and safer. The Capio suture-capturing device, for instance, shortened the operative time for the sacrospinous portion of the surgery from about 39 minutes to about 21 minutes compared to the traditional long-needle-holder technique, with no difference in complications or three-year success rates.²⁵ However, a meta-analysis of different suture-passing methods found that suture-capturing devices like the Capio were associated with higher nerve injury rates overall, while traditional instruments like the Deschamps ligature carrier had higher blood transfusion rates.²⁶ Each instrument trades one risk profile for another.

On the suture material front, whether permanent or absorbable sutures are used does not appear to affect outcomes. A comparative study found nearly identical anatomical success at twelve months (about 69% with absorbable versus 67% with permanent sutures), and similar subjective cure rates. The one difference: permanent sutures were associated with more pain in the immediate postoperative period.²⁷ Since the vaginal tissue fuses directly to the ligament during healing, the suture’s job is really just to hold things in place until that fusion occurs, which explains why the material does not seem to matter once healing is complete.

Does Adding Mesh Help

Given the concerns about recurrence, an obvious question is whether reinforcing the repair with mesh improves things. A study comparing mesh-augmented sacrospinous hysteropexy to native-tissue repair found no added benefit from mesh: about 95% of women in both groups achieved surgical success, with no difference in complication rates. There were no mesh-related complications such as exposure or chronic pelvic pain in the mesh group.²⁸ Follow-up in that study was relatively short (median about seven months), so longer-term comparisons would be needed to confirm this. But at least for primary repair, the added complexity and risk of mesh may not buy you much when the sacrospinous ligament is your anchor point.

This is a separate question from the mesh used in abdominal sacrocolpopexy, which goes between the vagina and sacrum rather than through the sacrospinous ligament. Vaginal mesh for prolapse has drawn regulatory scrutiny due to exposure and pain complications, but the mesh used in sacrocolpopexy has a different complication profile and generally more favorable data. These are distinct procedures with distinct risk-benefit profiles, and it is worth being specific when discussing “mesh” in the context of prolapse repair.

Combining Sacrospinous Fixation with Other Repairs

Prolapse rarely involves just one part of the vagina in isolation. Many women have a combination of front-wall, back-wall, and top-of-the-vagina descent, and surgeons commonly perform multiple repairs in a single session. Sacrospinous fixation is frequently paired with anterior colporrhaphy (front-wall repair), posterior colporrhaphy (back-wall repair), or both. Some surgeons also combine it with a midurethral sling if stress urinary incontinence is present or expected to unmask once the prolapse is corrected.

One study evaluating a combined approach using an anterior transobturator mesh along with sacrospinous fixation for advanced prolapse found that among women without a concurrent sling, about 60% saw improvement in pre-existing stress incontinence. However, new-onset stress incontinence emerged in roughly 10 to 12% of patients.²⁹ This phenomenon, called occult or latent stress incontinence, happens because the prolapse itself was acting like a kink in a hose, masking leakage. Once the prolapse is fixed and the anatomy straightens out, leakage can appear for the first time. It is something your surgeon should discuss with you before the operation, particularly if preoperative testing suggests it might occur.

Operative times naturally increase with each additional procedure. In a multi-center comparison, sacrospinous fixation as a standalone took a mean of about two hours, while the combination of procedures can push the total operative time higher depending on what else is being done.³⁰ The overall complication rates have not been shown to increase dramatically when procedures are combined, but recovery time and catheter use tend to edge upward.

When Sacrospinous Fixation Makes the Most Sense

No single prolapse operation is best for everyone, and the decision involves weighing anatomy, health status, activity level, and personal priorities. Sacrospinous fixation tends to be favored for women who want to avoid abdominal surgery, those who have medical conditions making longer operations riskier, and those who prefer a native-tissue approach without mesh. It can be done under regional anesthesia, and the recovery period is often shorter than for abdominal sacrocolpopexy, with less time in the hospital.³¹

For younger women or those for whom the highest possible long-term durability is the priority, sacrocolpopexy remains the standard comparison point, with its modestly better anatomical outcomes weighed against longer surgery, higher cost, and the use of mesh. For women who just want relief from bothersome symptoms and prefer the least invasive surgery with the quickest recovery, sacrospinous fixation remains a well-supported option, and the fact that anatomical recurrence on a doctor’s exam does not always translate into a problem you feel is worth keeping in mind when evaluating the numbers.