Obs&Gyn Urinary incontinence Flashcards
What problems does urogynecology deal with?
- urinary incontinence
- bladder-related problems
- prolapse
What’s incontinence?
Incontinence is the involuntary loss of urine which is both a social and hygienic problem
What’s required for continence?
Continence requires:
- normal anatomy
- good closure of the urethral sphincters/muscle
Classifiction of incontinence (4)
- overactive bladder (OAB)/urge incontinence: due to detrusor overactivity
- stress incontinence: leaking small amounts when coughing or laughing
- mixed incontinence: both urge and stress
- overflow incontinence: due to bladder outlet obstruction, e.g. due to prostate enlargement
Risk factors for urinary incontinence
- advancing age
- previous pregnancy and childbirth
- high body mass index
- hysterectomy
- family history
Pathophysiology of stress incontinence
- Anatomy: decent of bladder neck & superior part of urethra outside of abdo cavity means increased abdo pressure (e.g. during sneezing) only exerted on bladder & not on neck & urethra so urine forced out of bladder
- Decent of bladder neck caused by: inc age, inc parity (especially prolonged 2nd stage of labour), postmenopausal women, chronic raised intra-abdo pressure: obesity, COPD, constipation
- Increased abdo pressure caused by: sneezing, coughing, laughing, activity
Aetiology of urge incontinence
- largely idiopathic
- associated disease: MS, autonomic neuropathy, spinal lesions, pelvic surgery (damaging nerve connections)
- can be exacerbated (but not caused by): caffeine, alcohol & smoking
- urge incontinence can be caused by: infection, stones or tumours
Signs and symptoms of stress incontinence
- Factors provoking leakage: coughing, sneezing, exertion
O/E:
- try to provoke incontinence
- speculum to look for prolapse
- assess severity and impact on daily life
Signs and symptoms of urge incontinence
- frequency
- nocturia
- urgency
Important to assess severity and impact on daily life.
Initial investigations for urinary incontinence
- bladder diary for minimum of 3 days
- urinalysis & mid stream sample to rule out UTI
- vaginal examination to exclude pelvic organ prolapse and ability to initiate voluntary contraction of pelvic floor muscles (‘Kegel’ exercises)
Specialised investigations for urinary incontinence
Urodynamics:
- Uroflowmetery: measurement of flow rate (simple & non-inasive)
- Cystometry: Measures intra-abdominal & urethral pressure, can diagnose urge & stress by exclusion of urge
- Videocystourethrography (VCU): Bladder filled w/ dye then x-rays
Imaging:
- Cystoscopy-visualization of bladder (few indications) can show polyps, calculi and malignancy
When to refer urgently with bladder problems?
Urgent Referral:
- microscopic haematuria (>50yo)
- visible haematuria
- recurrent & persistent UTI w/ hameaturia
- suspected malignancy
Management of urge incontinence
- bladder retraining (lasts for a minimum of 6 weeks, the idea is to gradually increase the intervals between voiding)
- bladder stabilising drugs: antimuscarinics are first-line e.g. Oxybutynin (immediate release), tolterodine (immediate release) or darifenacin (once daily preparation)*
- Invasive: bladder wall injection w/ botulinum A toxin. Sacral nerve stimulation to reduce detrusor overactivity
* Immediate release oxybutynin should, however, be avoided in ‘frail older women’
*mirabegron (a beta-3 agonist) may be useful if there is concern about anticholinergic side-effects in frail elderly patients
Management of stress incontinence
- pelvic floor muscle training: at least 8 contractions performed 3 times per day for a minimum of 3 months
- Physiotherapy: to increase muscle tone and strength, & increase cortical connection to these muscles. 40-60% will need no further treatment than physio
*Bladder retraining should be used in conjunction
- Duloxetine as 2nd line
- surgical procedures: e.g. retropubic mid-urethral tape procedures
Surgeries for stress incontinence
- 1st line surgery: Retropubic mid -urethral tape procedure (high efficacy, good recovery rate and decreased cost)
- 2nd line: Colposuspension
- 3rd Line: autologous rectus fascial sling