A consensus statement on when to start clean intermittent self-catheterization: An untapped resource?

BACKGROUND: Clean intermittent self-catheterisation (CISC or ISC) is used by patients/carers to empty the bladder if needed. Sometimes the urethral lumen leading out of the bladder is blocked; sometimes, the bladder (detrusor) muscle itself or the autonomic motor nerves innervating the bladder are damaged, resulting in a failure of the detrusor muscle to work, leading to a failure of the bladder being able to empty adequately. Prior consensus as to the indications and timing of CISC has yet to be provided. This article aims to provide a multidisciplinary consensus view on this subject. CONCLUSION: It is evident that every patient needs to be considered individually, bearing in mind the symptoms and investigations to be considered. We emphasise the importance of considering the term Bladder Voiding Efficiency (BVE). One group of patients who might find CISC helpful are those with a neurological disorder; these include spinal injury patients, multiple sclerosis, Parkinson's, and a condition called cauda equina. Sometimes bladder problems are treated with anticholinergics, and others may be treated with Botox. These may cause the bladder not to empty at all, which is good for leaks but needs self-catheterisation to empty the bladder. In the past, hospitals used a permanent catheter called an 'indwelling' or a 'suprapubic' catheter. These can have side effects, including infections, stones, and pain. For CISC, disposable catheters are the best option for patients as they come in different sizes and styles to provide individualised care. In conclusion, we would like hospitals to consider each patient separately and not use a general 'one-size-fits-all' bladder function for these patients.

Another Therapeutic Role for Intravesical Botulinum Toxin: Patients with Long-stay Catheters and Refractory Bladder Pain and Catheter Bypass Leakage.

BACKGROUND: Botulinum neurotoxin (BotN) is used to treat detrusor overactivity (DO) refractory to medical treatment. Catheterised patients with symptoms of bladder spasm and catheter bypass leakage are challenging to manage and the efficacy of BotN is not established. OBJECTIVE: To review our experience using intravesical BotN to treat refractory bladder pain and catheter bypass leakage in patients with long-term indwelling catheters. DESIGN, SETTING, AND PARTICIPANTS: We carried out a review of data prospectively collected for patients with indwelling urethral or suprapubic catheters receiving BotN for the treatment of bladder spasms and catheter bypass leakage in a UK tertiary centre. An unvalidated structured questionnaire was used to ascertain quality of life (QoL) outcomes. OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS: Qualitative data were collected for patient-reported symptoms and QoL. Paired Student t tests were applied for statistical analysis. RESULTS AND LIMITATIONS: Of the 54 catheterised patients who received BotN, 14 (26%) were male and 40 (74%) were female. The mean follow-up was 38mo. Of the patients, 34 (63%) had a neurological aetiology and 94% had experienced failure of medical therapy before BotN administration. The BotN starting dose was 100 or 200U and 17 patients (31%) required dose escalation. All 34 neurogenic and six non-neurogenic patients started on 200U. After treatment, 63% of patients managed their catheter with intermittent drainage and 37% managed on free drainage; 51 patients (94%) reported that their symptoms were controlled and 38% reported being treated for a urinary tract infection following BotN. Patients reported a mean improvement in QoL of 7.7/10 following BotN, while 83% reported a significant reduction in urine leakage (p=0.0001). CONCLUSIONS: Outpatient intravesical BotN is safe and efficacious for patients with long-term catheters suffering from bladder pain and catheter bypass leakage. PATIENT SUMMARY: Outpatient administration of intravesical botulinum toxin is a safe and effective treatment for patients with a long-term indwelling catheter with bothersome urine storage symptoms. Attention should be paid to urine microbiology results before treatment to ensure appropriate prophylactic antibiotic treatment to reduce the incidence of urinary tract infections.

The Impact of Nocturia on Falls and Fractures: A Systematic Review and Meta-Analysis.

PURPOSE: Although nocturia is associated with various comorbidities, its impact on falls and fractures remains unclear. We performed a systematic review and meta-analysis to evaluate the association between nocturia and falls and fractures as a prognostic and as a causal risk factor. MATERIALS AND METHODS: We searched PubMed®, Scopus®, CINAHL (Cumulative Index to Nursing and Allied Health Literature) and abstracts of major urological meetings up to December 31, 2018. We conducted random effects meta-analyses of adjusted relative risks of falls and fractures. We applied the GRADE (Grading of Recommendations, Assessment, Development and Evaluation) approach to rate the quality of evidence for nocturia as a prognostic and causal factor of falls and fractures. RESULTS: Among 5,230 potential reports 9 observational longitudinal studies provided data on the association between nocturia and falls or fractures (1 for both, 4 for falls, 4 for fractures). Pooled estimates demonstrated a risk ratio of 1.20 (95% CI 1.05-1.37, I2=51.7%, annual risk difference 7.5% among the elderly) for association between nocturia and falls and 1.32 (95% CI 0.99-1.76, I2=57.5%, annual risk difference 1.2%) for association between nocturia and fractures. Subgroup analyses showed no significant effect modification by age, gender, followup time, nocturia case definition or risk of bias. We rated the quality of evidence for nocturia as a prognostic factor as moderate for falls and low for fractures, and as very low as a cause of falls/fractures. CONCLUSIONS: Nocturia is probably associated with an approximately 1.2-fold increased risk of falls and possibly an approximately 1.3-fold increased risk of fractures.

The Impact of Nocturia on Mortality: A Systematic Review and Meta-Analysis.

PURPOSE: Nocturia (waking from sleep at night to void) is a common cause of sleep disruption associated with increased comorbidity and impaired quality of life. However, its impact on mortality remains unclear. We performed a systematic review and meta-analysis to evaluate the association of nocturia with mortality as a prognostic factor and a causal risk factor. MATERIALS AND METHODS: We searched PubMed®, Scopus®, CINAHL® (Cumulative Index of Nursing and Allied Health Literature) and major conference abstracts up to December 31, 2018. Random effects meta-analyses were done to address the adjusted RR of mortality in people with nocturia. Meta-regression was performed to explore potential determinants of heterogeneity, including the risk of bias. We applied the GRADE (Grades of Recommendation, Assessment, Development and Evaluation) framework to rate the quality of evidence for nocturia as a prognostic risk factor for mortality and separately as a cause of mortality. RESULTS: Of the 5,230 identified reports 11 observational studies proved eligible for inclusion. To assess nocturia 10 studies used symptom questionnaires and 1 used frequency-volume charts. Nocturia was defined as 2 or more episodes per night in 6 studies (55%) and as 3 or more episodes per night in 5 (45%). Pooled estimates demonstrated a RR of 1.27 (95% CI 1.16-1.40, I2=48%) with an absolute 1.6% and 4.0% 5-year mortality difference in individuals 60 and 75 years old, respectively. The pooled estimates of relative risk did not differ significantly across varying age, gender, followup, nocturia case definition, risk of bias or study region. We rated the quality of evidence for nocturia as a prognostic factor as moderate and as a cause of mortality as very low. CONCLUSIONS: Nocturia is probably associated with an approximately 1.3-fold increased risk of death.

Islam and the Urinary Stoma: A Contemporary Theological and Urological Dilemma.

BACKGROUND: The prayer ritual is an essential component of Islam that requires entry into a state of physical purity (wudhu) through ablution, which is invalidated by voiding. An important dilemma for patients and surgeons may arise when a Muslim patient is counselled on cystectomy because of the belief by some that an incontinent urinary diversion will automatically invalidate their wudhu. OBJECTIVE: To determine if there are any religious barriers and implications for Muslim patients undergoing an incontinent urinary diversion. DESIGN, SETTING, AND PARTICIPANTS: A questionnaire was distributed to all UK mosques, addressed to the imam (n=804). RESULTS AND LIMITATIONS: A total of 134 imams (response rate 16.7%) responded. There was general agreement among imams, with >90% answering that it is possible for a Muslim to perform ablution, pray, and enter a mosque with a urinary stoma. The majority of imams (86.6%) also stated that refusal of a urinary stoma was not justified by religious teachings. When asked if patients should choose the option of a neobladder despite this surgery having greater risk, 57.5% of respondents stated that they were either unsure or agreed with this alternative. CONCLUSIONS: The majority of imams agreed that Muslims with a urinary stoma are able to maintain their ablution, allowing them to conduct their daily prayers, and that this form of surgery should not be refused on religious grounds. Our study suggests that the consensus view is that a urinary stoma is not contraindicated with regard to the practice of Islamic prayer rituals. PATIENT SUMMARY: In this study we investigated if having a urinary stoma would be a religious barrier for Muslim patients in performing their obligatory prayer rituals. The overwhelming majority of imams stated that having a urinary stoma should not stop Muslim patients practising important aspects of their faith.

Penile Paraffinoma.

Penile paraffinoma is a rare cause of penile mass that can occur following injection of liquid paraffin, performed illicitly for penile augmentation. Over the past 2 yr, we have observed an increasing number of cases presenting with the complications of penile paraffinoma; three patients of central European origin have required inpatient treatment at our institution and posed a significant management dilemma. This mini-review aims to review the literature on the aetiopathogenesis, clinical features, diagnosis, and management of penile paraffinoma. A systematic search of PubMed and Scopus was performed with 10 case series and 26 case reports identified between 1956 and 2017. A total of 124 cases, with a mean age of 36.29 yr, were identified. The majority originated in Korea, and the most common injected material was liquid paraffin (80.6%). Patients presented with pain/swelling, ulceration/fistulae, and penile deformity. The majority required surgical excision of paraffinoma followed by reconstruction with a variety of procedures including split skin grafting, scrotal skin flap reconstruction, and prepuce grafting. Mean duration of follow-up was 15.8 mo. Penile paraffinoma remains a rare presentation; however, it can present management difficulties. We have had an increase in cases, with three patients presenting with complications following injection of paraffin in our unit in the past 2 yr. Definitive management includes surgical excision and reconstruction as required with early involvement of plastic surgeons. There may be a role for conservative management; however, long-term outcomes are unclear. There may be a need for targeted preventative measures through public health agencies in communities where the practice is more prevalent. PATIENT SUMMARY: Penile paraffinoma can occur following injection of liquid paraffin or similar substances, generally used by non-healthcare personnel for the purpose of penile augmentations, and can cause significant pain, ulceration, and penile deformity. Definitive management includes surgical excision with reconstruction as required. Prevention of its use through awareness and education may be required in communities where the practice is more common.

Surveillance and management of urologic complications after spinal cord injury.

PURPOSE: Neurogenic bladder due to spinal cord injury has significant consequences for patients' health and quality of life. Regular surveillance is required to assess the status of the upper and lower urinary lower urinary tracts and prevent their deterioration. In this review, we examine surveillance techniques in neurogenic bladder, describe common complications of this disease, and address strategies for their management. METHODS: This work represents the efforts of SIU-ICUD joint consultation on Urologic Management of the Spinal Cord injury. For this specific topic, a workgroup was formed and comprehensive literature search of English language manuscripts regarding neurogenic bladder management was performed using key words of neurogenic bladder. Articles were compiled, and recommendations in the chapter are based on group discussion and follow the Oxford Centre for Evidence-based Medicine system for Levels of Evidence (LOEs) and Grades of Recommendation (GORs). RESULTS: At a minimum, patients should undergo an annual history and physical examination, renal functional testing (e.g., serum creatinine), and upper tract imaging (e.g., renal ultrasonography). The existing evidence does not support the use of other modalities, such as cystoscopy or urodynamics, for routine surveillance. Urologic complications in neurogenic bladder patients are common and often more complex than in the general population. CONCLUSIONS: There is a shortage of high-quality evidence to support any particular neurogenic bladder surveillance protocol. However, there is consensus regarding certain aspects of regular genitourinary system evaluation in these patients. Proper surveillance allows the clinician to avoid or address common urological complications, and to guide, alter, or maintain appropriate therapeutic regimens for individual patients.

The Midurethral Fascial "Sling on a String": An Alternative to Midurethral Synthetic Tapes in the Era of Mesh Complications.

BACKGROUND: Surgery for stress urinary incontinence (SUI) has been dominated recently by synthetic midurethral tapes. Increasing recognition of serious complications associated with nonabsorbable polypropylene mesh has led to resurgence in interest in alternative approaches, such as the autologous fascial sling (AFS). Despite being an efficacious and durable option in women with recurrent and complex SUI, there has been a reluctance to consider AFS in women with primary SUI due to a perception that it is only appropriate for treating patients with intrinsic sphincter deficiency (ISD) and is associated with high rates of urinary retention and de novo storage symptoms. OBJECTIVE: The video presented demonstrates the technique for a loosely applied midurethral AFS. In contrast to AFS applied at the bladder neck, this technical modification in patients who demonstrate primary SUI without ISD avoids high rates of de novo storage symptoms and urinary retention. DESIGN, SETTING, AND PARTICIPANTS: A retrospective review of data on patients undergoing AFS at a tertiary referral unit. SURGICAL PROCEDURE: AFS placement in a "loose" fashion using a short length of fascia suspended on a suture bilaterally at the midurethral level rather than at the bladder neck and only using more tension in patients with ISD. MEASUREMENTS: Subjective cure rate, rates of postoperative storage symptoms, and urinary retention necessitating intermittent self-catheterisation (ISC). RESULTS AND LIMITATIONS: A total of 106 patients underwent AFS; the mean follow-up period was 9 mo. The mean age was 52.6 (range 24-83) yr. In total, 46.2% had primary SUI, whilst all of the remaining 53.8% had undergone prior surgical intervention. Overall subjective cure occurred in 79.2% of patients; a further 15.1% described significant subjective improvement in symptoms, whilst 5.7% reported no change in symptoms. In those with primary SUI, rates of subjective cure, improvement, and nonresolution of symptoms were 87.8%, 12.2%, and 0%, respectively. In individuals with prior surgical intervention, rates of subjective cure, improvement, and nonresolution of symptoms were 72.0%, 17.5%, and 10.5%, respectively. De novo storage symptoms occurred in 8.2% of those with primary SUI compared with 14.0% of those with prior surgical intervention. Only 2.0% patients with primary SUI needed to perform ISC beyond 2 wk compared with 10.5% of those after prior surgery. CONCLUSIONS: A midurethral AFS appears to be effective and safe both in women with primary SUI who want to avoid the placement of permanent material and its attendant risks, and in more complex cases where this is less appropriate. PATIENT SUMMARY: A graft taken from the covering of the abdominal muscle or the outer aspect of the thigh is an alternative to a synthetic vaginal mesh in women who have stress urinary incontinence requiring surgical treatment. Placing the graft loosely at the midpoint of the urethral tube, rather than at the bladder neck, reduces the risk of postoperative voiding difficulty and overactive bladder symptoms. Long-term data have suggested an outcome at least as good as a synthetic nonabsorbable tape without the potential for sling erosion into adjacent structures, as it avoids the use of nonabsorbable material.

Antimuscarinics, ß-3 Agonists, and Phosphodiesterase Inhibitors in the Treatment of Male Lower Urinary Tract Symptoms: An Evolving Paradigm.

It is increasingly recognized that the bladder is the originator of storage lower urinary tract symptoms, including overactive bladder in men. As these symptoms are most bothersome for patients, there has been an increasing interest in the evaluation of drug treatment to better target the bladder. Consequently, several new drug classes have been introduced to the therapeutic armamentarium. Antimuscarinics, which were previously avoided due to the concern regarding urinary retention, are now used in routine practice; however, their use is still hampered by discontinuation due to side effects.

The underactive bladder: detection and diagnosis.

The inability to generate a voiding contraction sufficient to allow efficient bladder emptying within a reasonable time frame is a common problem seen in urological practice. Typically, the symptoms that arise are voiding symptoms, such as weak and slow urinary flow. These symptoms can cause considerable bother to patients and impact upon quality of life. The urodynamic finding of inadequate detrusor contraction has been termed detrusor underactivity (DUA). Although a definition is available for this entity, there are no widely accepted diagnostic criteria. Drawing parallels to detrusor overactivity and the overactive bladder, the symptoms arising from DUA have been referred to as the "underactive bladder" (UAB), while attempts to crystallize the definition of UAB are now ongoing. In this article, we review the contemporary literature pertaining to the epidemiology and etiopathogenesis of DUA as well as discuss the definitional aspects that are currently under consideration.

Recent advances in understanding urethral lichen sclerosus.

Lichen sclerosus affecting the male genitalia is a poorly understood but potentially devastating condition. The natural history of the condition is beginning to be understood better with longer follow-up of patients. Recent long-term data suggest that circumcision for lichen sclerosus limited to the prepuce may not be curative as was once thought. In addition, surgical treatments should be followed up for longer periods as recurrences may occur after urethroplasty and perineal urethrostomy.

Evaluation and management of anterior urethral stricture disease.

Urethral stricture disease affects many men worldwide. Traditionally, the investigation of choice has been urethrography and the management of choice has been urethrotomy/dilatation. In this review, we discuss the evidence behind the use of ultrasonography in stricture assessment. We also discuss the factors a surgeon should consider when deciding the management options with each individual patient. Not all strictures are identical and surgeons should appreciate the poor long-term results of urethrotomy/dilatation for strictures longer than 2 cm, strictures in the penile urethra, recurrent strictures, and strictures secondary to lichen sclerosus. These patients may benefit from primary urethroplasty if they have many adverse features or secondary urethroplasty after the first recurrence.

Incidence and Remission of Nocturia: A Systematic Review and Meta-analysis.

CONTEXT: Although vital for decision-making about management, the natural history of nocturia remains uncertain. A systematic review would clarify the issue, but because natural history reviews are uncommon it would require methodological innovations. OBJECTIVE: To estimate the incidence and remission of nocturia, and refine methods for meta-analyses assessing natural history. EVIDENCE ACQUISITION: We conducted a comprehensive search of PubMed, Scopus, and Cumulative Index of Nursing and Allied Health Literature databases and abstracts of major urologic meetings as far as August 31, 2015. Random effects meta-analyses addressed incidence/remission rates of nocturia; meta-regression explored potential determinants of heterogeneity. Studies were categorized as either low or high risk of bias using a novel instrument specifically designed for longitudinal symptom studies aimed at the general population. EVIDENCE SYNTHESIS: Of 4165 potentially relevant reports, 16 proved eligible. Pooled estimates from 13 studies (114 964 person-years of follow-up) demonstrated that annual incidence was strongly associated with age: 0.4% (0-0.8%) for adults aged < 40 yr; 2.8% (1.9-3.7%) for adults aged 40-59 yr; and 11.5% (9.1-14.0%) for adults aged ≥ 60 yr. Of those with nocturia, each year 12.1% (9.5-14.7%) experienced remission. CONCLUSIONS: The available evidence suggests that nocturia onset is strongly associated with age, with much higher rates in those over 60 yr; remission occurs in approximately 12% each year. These estimates can aid with management decisions and counseling related to nocturia. PATIENT SUMMARY: We reviewed all previous studies of progression of night-time urination (nocturia). We found that in any given year 0.4% of adults aged < 40 yr, 3% of adults aged 40-59 yr, and 12% of adults aged ≥ 60 yr will develop nocturia, while overall 12% of those with nocturia will improve. These findings may be helpful in making decisions about coping with or treating nocturia.

Application of Tissue Engineering to Pelvic Organ Prolapse and Stress Urinary Incontinence.

Synthetic or biological materials can be used for the surgical repair of pelvic organ prolapse (POP) or stress urinary incontinence (SUI). While non-degradable synthetic mesh has a low failure rate, it is prone to complications such as infection and erosion, particularly in the urological/gynecological setting when subject to chronic influences of gravity and intermittent, repetitive strain. Biological materials have lower complication rates, although allografts and xenografts have a high risk of failure and the theoretical risk of infection. Autografts are used successfully for the treatment of SUI and are not associated with erosion; however, can lead to morbidity at the donor site. Tissue engineering has thus become the focus of interest in recent years as researchers seek an ideal tissue remodeling material for urogynecological repair. Herein, we review the directions of current and future research in this exciting field. Electrospun poly-L-lactic acid (PLA) and porcine small intestine submucosa (SIS) are two promising scaffold material candidates. Adipose-derived stem cells (ADSCs) appear to be a suitable cell type for scaffold seeding, and cells grown on scaffolds when subjected to repetitive biaxial strain show more appropriate biomechanical properties for clinical implantation. After implantation, an appropriate level of acute inflammation is important to precipitate moderate fibrosis and encourage tissue strength. New research directions include the use of bioactive materials containing compounds that may help facilitate integration of the new tissue. More research with longer follow-up is needed to ascertain the most successful and safe methods and materials for pelvic organ repair and SUI treatment.

Delayed repair of pelvic fracture urethral injuries: Preoperative decision-making.

Pelvic fracture urethral injuries comprise one of the most challenging reconstructive procedures in urology. The obliterated or stenosed urethra can usually be effectively repaired by an end-to-end anastomosis (bulbomembranous anastomosis). To achieve this, a progression of surgical steps can be used to make a tension-free anastomosis. Before undertaking surgery it is important to comprehensively assess the patient to define their anatomical defects, in particular the site of the stenosis, the length of the distraction injury and the integrity of the bladder neck, and thus guide preoperative decision-making. Contemporary reports suggest that most pelvic fracture urethral distraction defects (PFUDD) can be adequately managed by a perineal approach. Nevertheless it is essential that all surgeons treating these injuries are familiar with the whole spectrum of operative steps that are necessary to repair PFUDD.

Systematic review and metaanalysis of genetic association studies of urinary symptoms and prolapse in women.

OBJECTIVE: Family studies and twin studies demonstrate that lower urinary tract symptoms and pelvic organ prolapse are heritable. This review aimed to identify genetic polymorphisms tested for an association with lower urinary tract symptoms or prolapse, and to assess the strength, consistency, and risk of bias among reported associations. STUDY DESIGN: PubMed and HuGE Navigator were searched up to May 1, 2014, using a combination of genetic and phenotype key words, including "nocturia," "incontinence," "overactive bladder," "prolapse," and "enuresis." Major genetics, urology, and gynecology conference abstracts were searched from 2005 through 2013. We screened 889 abstracts, and retrieved 78 full texts. In all, 27 published and 7 unpublished studies provided data on polymorphisms in or near 32 different genes. Fixed and random effects metaanalyses were conducted using codominant models of inheritance. We assessed the credibility of pooled associations using the interim Venice criteria. RESULTS: In pooled analysis, the rs4994 polymorphism of the ADRB3 gene was associated with overactive bladder (odds ratio [OR], 2.5; 95% confidence interval [CI], 1.7-3.6; n = 419). The rs1800012 polymorphism of the COL1A1 gene was associated with prolapse (OR, 1.3; 95% CI, 1.0-1.7; n = 838) and stress urinary incontinence (OR, 2.1; 95% CI, 1.4-3.2; n = 190). Other metaanalyses, including those for polymorphisms of COL3A1,LAMC1,MMP1,MMP3, and MMP9 did not show significant effects. Many studies were at high risk of bias from genotyping error or population stratification. CONCLUSION: These metaanalyses provide moderate epidemiological credibility for associations of variation in ADRB3 with overactive bladder, and variation of COL1A1 with prolapse. Clinical testing for any of these polymorphisms cannot be recommended based on current evidence.

Application of guidelines to the evaluation of the male patient with urgency and/or incontinence.

PURPOSE OF REVIEW: To review and evaluate the evidence from contemporary evidence-based guidelines regarding the assessment of men with urinary urgency and/or incontinence. RECENT FINDINGS: There are a number of evidence-based guidelines which describe the pathways for assessing men with the symptoms of urgency and/or incontinence. We summarize the conclusions of the European Association of Urology, American Urological Association and National Institute of Clinical Excellence guidelines. SUMMARY: All guidelines recommend a directed history, examination (including digital rectal examination), urinalysis and bladder diary as being essential in the assessment of men with lower urinary tract symptoms, although there are no high levels of evidence studies to support this. Creatinine estimation and prostate-specific antigen are recommended in selected groups of men, the latter after appropriate counselling. Uroflowmetry with postvoid residual assessment is recommended for at specialist assessment. Pad tests may be useful to quantify leakage. Ultrasound assessment of prostatic size and protrusion into the bladder base may be useful. Cystometry is recommended for men considering prostatic surgery, although there is a poor level of evidence underpinning this. Noninvasive surrogates for cystometry, such as penile plethysmography, lack sufficient evidence to allow recommendations to be made.

What is the feasibility of switching to 200IU OnabotulinumtoxinA in patients with detrusor overactivity who have previously received 300IU?

INTRODUCTION: To assess the feasibility of converting from 300IU to 200IU OnabotulinumtoxinA in patients diagnosed with either idiopathic detrusor overactivity (IDO) or neurogenic detrusor overactivity (NDO). MATERIAL AND METHODS: Retrospective case-notes review of patients who were converted from 300IU to 200IU OnabotulinumtoxinA. Subjective patient reported improvements at interview and bladder diary reported parameters of urgency, urgency incontinence, frequency and nocturia. RESULTS: Forty-four patients had received 300IU OnabotulinumtoxinA and were switched to 200IU after July 2008, 28 for IDO and 16 for NDO. Thirty-seven patients reported ongoing improvement with 200IU OnabotulinumtoxinA, six patients had worsening in their symptoms since down-titrating to 200IU and one patient did not attend follow-up. Improvement in urgency and urgency incontinence episodes per day were 82% and 72%, respectively, in patients who received 200IU. Of the 44 patients, 39 continued to receive 200IU, four requested up-titration to 300IU (due to decreased effect) and one did not attend after the 1st treatment. After converting from 300IU to 200IU, additional three patients were started on CISC for de novo voiding difficulty. CONCLUSIONS: Seventy-nine percent of patients were satisfied with their symptoms after switching from 300IU to 200IU OnabotulinumtoxinA. Only 9% of patients (all with NDO) reverted back to receiving 300IU. This study showed similar efficacy and longevity in the majority of patients (90%) using 200IU in both NDO and IDO.