Ultrasound assessment of urethral structure and bladder neck position in women with different parities.

INTRODUCTION AND HYPOTHESIS: The study aims to compare the urethral sphincter size and bladder neck position and mobility in women with different parities. METHODS: Women referred to the urodynamics clinic for lower urinary tract and prolapse symptoms were included in the study. A detailed history was taken, and transperineal two- and three-dimensional ultrasound was performed on all the women. The women were divided into four groups according to the vaginal parity. Group 1 had no vaginal childbirths. Group 2 had one, group 3 had two and group 4 had three or more vaginal childbirths. The data was analysed and compared among the groups. RESULTS: One hundred fifty women were included in the study. There were 34, 22, 48 and 46 women in groups 1 to 4 respectively. The distribution of different urodynamic diagnoses was similar in all four groups. The urethral sphincter measurements were significantly larger in the vaginally nulliparous group than in all other groups. The measurements were not smaller in multiparous women than in primiparous women. The bladder neck was at a lower position at rest in parous women than nulliparous women. The bladder neck movement was not more in groups 2 to 4 than in group 1. CONCLUSION: The urethral sphincter was smaller and the bladder neck position was lower in parous women than nulliparous women. These differences were not progressive with increasing parity. Request for elective caesarean section during the second pregnancy to protect the urethra is not supported by this study.

Urethral sphincter volume and urodynamic diagnosis.

AIM: To compare urethral sphincter measurements in women with different urodynamic diagnoses using three-dimensional transperineal ultrasound (TPU). METHODS: Women with lower urinary tract dysfunction having urodynamic studies (UDS) were prospectively recruited to this study. A detailed history and vaginal examination were conducted. Saline cystometry was performed and the women were divided into groups according to their urodynamic diagnosis, which were nondiagnostic urodynamics (NUDS), pure detrusor overactivity (PureDO), pure urodynamic stress incontinence (PureUSI) and mixed urinary incontinence (MUDS). Three-dimensional TPU was performed to measure total urethral sphincter volume, striated sphincter volume, core volume, sphincter length and maximum cross-sectional area. The ultrasound measurements were compared with the diagnostic urodynamics. RESULTS: One hundred fifty women were included in the study. There were 37, 53, 22 and 38 women in the groups of NUDS, PureDO, PureUSI and MUDS respectively. The average striated sphincter volumes in these groups were 1.84 ml, 2.24 ml, 1.32 ml and 1.98 ml respectively. There was no difference in average age, body mass index or presence of prolapse in these groups. All measurements were larger in the PureDO and smaller in the PureUSI group compared with the NUDS group. The measurements in the MUDS group were larger than in the NUDS group and smaller than in the PureDO group but this difference was not statistically significant. CONCLUSION: The urethral sphincter of women with PureDO is larger than in women with PureUSI. The value in women with MUDS was between the two. The size of the urethral sphincter appears to be related to the pathophysiology.

Gynaecological pathology in women with Fowler's syndrome.

OBJECTIVES: To assess the prevalence of gynaecological pathologies in women with Fowler's syndrome (FS) which is characterised by chronic urinary retention (CUR) secondary to failure of urethral sphincter to relax and allow normal voiding. STUDY DESIGN: This was a case control study conducted at a tertiary referral centre specialised in managing women with FS. There were 41 patients with FS in the study group with CUR without mechanical obstruction of the urethra or neurological problem. All patients had raised maximum urethral closure pressure on urethral pressure profile, high urethral sphincter volume on ultrasound and complex repetitive discharges on eletromyography of the urethral sphincter. Normal voiding was established in these women after treatment with sacral neuromodulation. Fifty women without voiding dysfunction acted as control group. Data was obtained by using standard questionnaire for both the groups. Information was collected regarding gynaecological pathologies such as endometriosis, polycystic ovarian syndrome, menstrual abnormalities, ovarian cysts and subfertility and also regarding previous pregnancies. Analysis was performed using SPSS software from IBM Corporation. RESULTS: At least one gynaecological pathology was present in 33 (80%) patients with FS compared to 16 (32%) women from control group (P<0.001). This included a higher incidence of endometriosis (29% versus 6%, P=0.003), PCOS (24% versus 8%, P=0.041) and subfertility (34% versus 8%, P=0.003). The incidence of menstrual abnormalities and ovarian cysts was similar in both groups (P>0.05). CONCLUSION: Subfertility was more prevalent in women with FS in our study. Though the prevalence of different pathologies was higher in the FS group compared to the control group, it remained similar to that found in the normal female population in the published literature. Thus, it is not possible to state whether FS is caused by a hormonally based disorder. It took patients many years before they could get right diagnosis and treatment for FS. Early investigation of chronic urinary retention and referral to specialists for appropriate treatment in this small group of women can result in better health and improvement in their quality of life.

Emerging drugs for overactive bladder.

INTRODUCTION: Overactive bladder (OAB) is a common problem which can have disastrous effects on the quality of life of the sufferer. There are established treatments for the problem but they have significant adverse effects. Better drugs and new treatment modalities are necessary to deal with OAB. AREA COVERED: Antimuscarinics, mirabegron and intravesical injection of botulinum toxin A are established treatments for OAB. Sacral neuromodulation is more invasive but has been successful in treating OAB. Phase II and III trials are in progress for newer ß3-agonists and various combinations of antimuscarinics, ß3-agonists and antidiuretics. Targeted secretion inhibitors (TSI) can increase efficacy and reduce adverse effects. Liposome integrated botulinum toxin A has an advantage of effective administration by intravesical instillation. Both medicines are in Phase II trials. Many other drugs which have promising results are discussed. EXPERT OPINION: Newer antimuscarinics have better tolerability. Long-term data for mirabegron has shown that it is more effective in severe OAB. Combination drugs may prove to be more effective with less adverse effects. Emerging treatments with TSI, lipotoxin and gene therapy appear promising.

Mode of delivery after obstetric anal sphincter injury.

OBJECTIVE: To assess the effect of vaginal delivery and caesarean section on faecal symptoms and structure and function of anal sphincter in women who sustained obstetric anal sphincter injuries (OASIS) in their previous pregnancy and were advised about the mode of delivery based on faecal incontinence symptoms, anal manometry and endoanal ultrasound. STUDY DESIGN: It is a descriptive study on a cohort of women who had OASIS from 2006 to 2013. They were assessed after OASIS and during subsequent pregnancy with a questionnaire, endoanal ultrasound and anal manometry. Vaginal delivery was recommended to asymptomatic women with normal investigations. Elective caesarean section was recommended to women with faecal symptoms, anal sphincter defects of more than 30° or low resting or incremental anal pressures. All women were reassessed after subsequent delivery. RESULTS: Fifty women who had pregnancies after OASIS, were seen after OASIS, during subsequent pregnancy and after the second delivery. 15 women had faecal symptoms after OASIS. The external, internal and combined anal sphincter defects were seen in 13, 11 and 9 women respectively. Low resting and incremental pressure were seen in 15 and 11 women respectively. Caesarean section was done in 22 women and 28 women delivered vaginally. Worsening of faecal symptoms and reduction in anal pressures were not observed in planned vaginal delivery or elective caesarean section groups. Faecal symptoms were worse with reduced anal pressures in three women from the planned caesarean section group. One of the women had a vaginal delivery and two women had emergency caesarean section at 7cm and 10cm dilatation. There were no new sphincter defects or recurrent OASIS in any of the women in the study group. CONCLUSION: Decision about the mode of delivery of pregnancy after OASIS based on symptoms, anal manometry and endoanal ultrasound helps in preserving the anal sphincter function and avoiding unnecessary caesarean sections. Further follow-up of these patients is essential to evaluate the long-term effects of this decision.

Pregnancy in women with Fowler's syndrome treated with sacral neuromodulation.

INTRODUCTION AND HYPOTHESIS: Our aim was to determine the impact of pregnancy on sacral neuromodulation (SNM) and vice versa in patients with Fowler's syndrome (FS), which is typified by chronic urinary retention (CUR). METHODS: We performed a retrospective study of pregnancy in patients with FS who underwent a two-stage SNM implantation. Data were obtained using a standard questionnaire and clinical interview. RESULTS: There were a total of ten patients with 13 pregnancies. The SNM was switched off in ten of the 13 pregnancies, with CUR recurring in nine of the ten pregnancies and recurrent urinary tract infections (UTI) occurring in four of these pregnancies (more than three UTI in the pregnancy). Those in whom the device was left on continued to void normally. One woman had a first trimester miscarriage, eight pregnancies went to term, and four deliveries were premature. Caesarean section was performed in eight pregnancies for obstetric reasons. Four pregnancies resulted in a vaginal delivery. There were no congenital anomalies reported. Following delivery, four of nine women experienced dysfunction of their SNM device when it was switched back on. CONCLUSION: Turing off the SNM during pregnancy results in recurrence of CUR, with an increased risk of recurrent UTI associated with preterm delivery. This did not impact foetal well-being. The option of keeping the SNM on during pregnancy should therefore be considered, and as caesarean section affects the SNM device, we advise that caesarean section should only be performed for obstetric reasons.