sling failures jerry g. blaivas, md clinical professor of urology weil-cornell medical center...
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Sling Failures
Jerry G. Blaivas, MDClinical Professor of Urology Weil-Cornell Medical Center
Adjunct Professor of UrologySUNY Downstate Medical Center
Why Do Operations Fail?
• Too tight
• Too loose
• Wrong position
• Detrusor overactivity
–De-novo
–Persistent
• Erosion
• Wrong indication
Too Tight
• Urethral obstruction
• Detrusor overactivity
• Erosion
• Devascularization > recurrent SUI
• Clinical:– De-novo symptoms
• Weak stream• OAB• negative Q-tip angle
• Urodynamics:– High detrusor pressure / low flow:
pdetmax > 20 cm H20Qmax < 12 ml/S
– Blaivas Groutz nomogram
Urethral Obstruction
- 45O
MSCO
MSCO
High pressure (pdetmax = 75)
Low flow (0)
Blaivas - Groutz Nomogram
0
20
40
60
80
100
120
140
160
0 10 20 30 40 50Free Qmax (ml/ sec)
pdet
.max
(cm
H2O
)
Moderate obstruction (2)
Severe obstruction (3)
Mild obstruction (1)
Unobstructed (0)
Blaivas & Groutz, Neurourol & Urodynam 19:553-564, 2000
Rx of Post op Urinary Retention
• Depends on type of sling• Initial Rx intermittent
catheterization• Synthetic sling
• early intervention days – weeks
• Autologous slings• Delayed intervention – months
Rx of Post op Urinary Retention
• ? Need for further workup
• Q-tip
• cystoscopy
• urodynamics
Surgical Rx of Sling Obstruction
• Sling incision• midline• lateral
• Urethrolysis• antero-lateral• circumferential • +/- Martius flap
interposition• Technique determined intraop
N Type Success % SUI %
Nitti, et al 19 Midline Incision 84% 17%
Amundsen, et al
32 Various 94% 9%
Goldman,et al
14 Midline Incision 93% 21%
Sling Incision Results
Nitti et al. Early results of pubovaginal sling lysis by midline sling incision. Urology 2002.
Amundsen et al. Variations in strategy for the treatment of urethral obstruction after a pubovaginal sling procedure. J Urol. 2000.
Goldman et al. Simple sling incision for the treatment of iatrogenic urethral obstruction. Urology 2003
Urethrolysis
• Vaginal
• Supra-meatal
• Retropubic
Circumferential Urethrolysis
Urethrolysis
• Vaginal
• Supra-meatal
• Retropubic
Urethrolysis
• Vaginal
• Supra-meatal
• Retropubic
Urethrolysis Results
N Type Success % SUI (%)
Foster & McGuire48 Transvaginal 65% 0%
Nitti & Raz 42 Transvaginal 71% 0%
Cross, et al 39 Transvaginal 72% 3%
Goldman, et al 32 Transvaginal 84% 19%
Petrou, et al 32 Suprameatal 67% 3%
Petrou & Young 12 Retropubic 83% 18%
Carr & Webster 54 Mixed 78% 14%
Too Tight
• Urethral obstruction
• Detrusor overactivity
• Erosion
• Devascularization > recurrent SUI
Too Tight
• Urethral obstruction
• Detrusor overactivity
• Erosion
• Devascularization > recurrent SUI
Bladder neck
Bladder neck
Eroded mesh
VLPP
Treatment of Erosions.
• remove as much of sling as possible
• closure of the urethra
• +/ - urethral reconstruction
• +/ - biologic sling
• +/ - Martius flap
Too Tight
• Urethral obstruction
• Detrusor overactivity
• Erosion
• Devascularization > recurrent SUI
Why Do Operations Fail?
• Too tight
• Too loose
• Wrong position
• Detrusor overactivity
–De-novo
–Persistent
• Erosion
• Wrong indication
Too Loose
Intrinsic sphincter deficiency
Urethral hypermobility
Recurrent sphincteric incontinence
VLPP
AGAGAG
VLLP = 92 cm H20Qtip = 0 > 60O
AG
JK
VLPP = 42 cm H20Q tip = 0
Treatment of Recurrent SUI
• no compelling data
• for hypermobility, surgeon choice
• for poorly mobile or pipe - stem urethra, biologic bladder neck sling
Why Do Operations Fail?
• Too tight
• Too loose
• Wrong position
• Detrusor overactivity
–De-novo
–Persistent
• Erosion
• Wrong indication
Wrong Position
• Too far proximal – persistent sphincteric incontinence
– urethral obstruction– ureteral injury
• Too far distal – persistent sphincteric incontinence
– urethral obstruction
– urethral hypermobility
MS
VLPP = 35 cm H20
Sling proximal to BN
sling
MSCO
High pdet
No flow
MSCO
MSCO
Why Do Operations Fail?
• Too tight
• Too loose
• Wrong position
• Detrusor overactivity
–De-novo
–Persistent
• Erosion
• Wrong indication
Wrong Indication• Urinary fistula mistaken for
sphincteric incontinence
• Overactive bladder mistaken for sphincteric incontinence
• Sine-qua-non - Never operate on stress incontinence without actually diagnosing sphincteric incontinence with your own eyes
Conclusion• Complications & failures after
incontinence surgery are not uncommon
• Early evaluation to rule out remediable causes should be undertaken– UTI– Urethral obstruction – sling erosion– foreign body
• A successful outcome is likely in the majority of patients