low urethral resistance with decreased bladder compliance.
refractory stress urinary incontinence (SUI) after failed midurethral sling and bulking agents.
urethral incompetence and large urethral diverticulum.
proximal urethral loss secondary to long-standing indwelling Foley catheter.
urethral incompetence in a T12 spinal cord injury.
The fast-twitch fibers of the external sphincter are responsible for sudden voluntary guarding reflex, and slow-twitch fibers provide passive control through the involuntary guarding reflex.
The PVS is placed at the bladder neck to provide adequate urethral coaptation at rest and to decrease urethral responsiveness to abdominal pressure.
The Valsalva pressure of the bladder exceeds the resting closing pressure of the internal sphincter.
The levator ani, urethropelvic ligament, and round ligament provide needed support to the bladder neck and undersurface of the bladder.
The female urethra is composed of four separate tissue layers, and the middle seromuscular layer is most important in enhancing the urethral sphincter mechanism during voiding.
Stiffness and maximal load failure are the same between freeze-dried fascia lata and solvent dehydrated and dermal grafts.
The ideal material has minimal tissue reaction and complete biocompatibility.
Porcine small intestinal submucosa has less tensile strength than cadaveric fascia lata.
Synthetic materials are associated with high erosion rates during use for bladder neck PVS.
The estimated risk of human immunodeficiency virus (HIV) transmission by an allograft sling is about 1 in 1,660,000.
(a) Reported cure rates after an autologous PVS procedure are 50% to 97%.
a and d
(c) Bladder neck PVS slings should be utilized for refractory or recurrent SUI but are associated with worse outcomes.
(d) In the SiSTER trial, cure rates and voiding symptoms were greater for the pubovaginal sling than for the Burch colposuspension.
(b) Preoperative Valsalva leak point pressure is a reliable predictor of outcomes after sling surgery.
Synthetic slings erode into the urethra 15 times more often than autologous, allograft, or xenograft slings.
Erosion from synthetic slings requires removal of all visible and palpable sling material.
Urethral erosions are often associated with urinary retention and mixed urinary incontinence.
There are only four cases of urethral erosion of an autologous PVS in the literature, and in most cases this may have been avoided by thorough cystoscopy.
The incidence of recurrent SUI in urethral erosions after use of a synthetic PVS is 74% to 100%.
There is up to a 20% recurrent SUI rate after urethrolysis.
Urodynamic study is valuable in assessment and planning management.
Fifty percent of affected patients have symptoms of overactive bladder, which can be avoided if sling lysis is performed within 2 weeks of PVS placement.
Persistent urgency is more common than urinary retention in bladder outlet obstruction after a PVS procedure.
Obstruction, detrusor overactivity, or impaired detrusor contractility are all manifestations of voiding dysfunction for iatrogenic PVS obstruction.
the levator floor provides active compression to the proximal urethra.
the extrinsic urethral skeletal sphincter is the primary mechanism for urinary continence.
intrinsic sphincter deficiency (ISD) is rarely the primary cause of SUI.
ISD is the primary underlying cause of SUI for women, with hypermobility being a secondary finding.
hypermobility is the main underlying cause of SUI.
the midurethral mechanism is intrinsically involved with bladder neck support.
aging and childbirth have no effect on the midurethral support structures.
the pubourethral ligaments are a secondary component of the complex.
the pubourethral ligaments and pubococcygeal muscles provide a central support point that, during stress events, function to kink or functionally hinge the urethra, rendering continence.
the midurethral continence mechanism is active both passively and during stress events.
loose tension is placed on the sling material.
the synthetic material used is a wide porosity mesh.
insertion trocars are used to transpose the implanted material into position.
the sling is sutured to the underlying tissues for fixation purposes.
cystoscopy is a crucial component of the procedure.
Postoperative voiding dysfunction is more common with midurethra procedures than with other types of suspension procedures.
Midurethral slings produce inferior results compared with laparoscopic colposuspensions.
Mixed incontinence results are superior to those of pure SUI.
Midurethral slings are less effective than open colposuspension procedures.
Five-year results demonstrate durability similar to 1-year results.
have mixed incontinence resolution rates higher than those in young patients.
result in postoperative urinary retention occurring more frequently.
are less effective than in younger patients.
have rates of postoperative urgency higher than those in young patients.
have satisfaction rates lower than those in young patients.
occult incontinence is not adequately addressed.
concomitant hysterectomy has an adverse effect on incontinence outcome.
rates of urethrolysis for postoperative retention are higher.
risks of erosion and infection are higher than in cases in which only a sling is performed.
rates of retention are slightly higher than in those undergoing a sling procedure only.
the technique needs to be altered when done as a primary procedure.
bladder perforation is less than in primary cases.
overall efficacy is similar to that of primary implantation.
complication rates are higher than when midurethral slings are done primarily.
failure rates are unaffected by urethral hypermobility.
de novo urgency occurs in up to 12% of patients.
voiding dysfunction ranges from 4% to 20%.
all of the above.
wound healing is delayed in approximately 1%.
bladder perforation injury rates range up to 5%.
unaffected by tension placed on the slings.
do not affect outcomes or satisfaction.
associated with vaginal erosions approximately 20% of the time.
decreased by the macroporous nature of the sling material.
associated with bladder erosion rates of 20%.
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