Correlation between urodynamic function and 3D cat scan anatomy in neobladders: Does it exist?

Urodynamic Parameters and Continence Outcomes in Asymptomatic Patients with Ileal Orthotopic Neobladder: A Systematic Review and Metanalysis

INTRODUCTION

The orthotopic neobladder is the type of urinary diversion (UD) that most closely resembles the original bladder. However, in the literature the urodynamic aspects are scarcely analysed.

OBJECTIVE

To provide the first systematic review (SR) on the urodynamic (UDS) outcomes of the ileal orthotopic neobladders (ONB). Continence outcomes are also presented.

METHODS

A PubMed, Embase and Cochrane CENTRAL search for peer-reviewed studies on ONB published between January 2001-December 2022 was performed according to the Preferred Reporting Items for Systematic Review and Meta-analysis (PRISMA) statement.

RESULTS AND CONCLUSION

Fifty-nine manuscripts were eligible for inclusion in this SR. A great heterogeneity of data was encountered. Concerning UDS parameters, the pooled mean was 406.2 mL (95% CI: 378.9-433.4 mL) for maximal (entero)cystometric capacity (MCC) and 21.4 cmH2O (95% CI: 17.5-25.4 cmH2O) for Pressure ONB at MCC. Postvoid-residual ranged between 4.9 and 101.6 mL. The 12-mo rates of day and night-time continence were 84.2% (95% CI: 78.7-89.1%) and 61.7% (95% CI: 51.9-71.1%), respectively.Despite data heterogeneity, the ileal ONB seems to guarantee UDS parameters that resemble those of the native bladder. Although acceptable rates of daytime continence are reported the issue of high rates of night-time incontinence remains unsolved. Adequately designed prospective trials adopting standardised postoperative care, terminology and methods of outcome evaluation as well as of conduction of the UDS in the setting of ONB are necessary to obtain homogeneous follow-up data and to establish UDS guidelines for this setting.

Ileal versus sigmoid neobladder as bladder substitute after radical cystectomy for bladder cancer: A meta-analysis

PURPOSE

To evaluate and compare the functional outcomes of ileal and sigmoid neobladders in patients underwent radical cystectomy.

METHODS

Relevant studies were identified by searching PubMed, Embase, and Cochrane Library. The studies comparing the functional outcomes of sigmoid neobladder (SN) and ileal neobladder (IN) in patients underwent radical cystectomy were included.

RESULTS

A total of 12 cohort studies were included in this meta-analysis. From our analysis, more early complications were observed in SN group than in IN group (RR = 1.37, 95% CI: 1.03-1.81). Both daytime and nighttime continence rates were significantly better in IN group than in SN group (RR = 0.87, 95%CI: 0.81-0.94) (RR = 0.73, 95%CI: 0.60-0.90). More patients could spontaneous voiding in SN group than in IN group (RR = 1.12, 95%CI: 1.00-1.26). According to the urodynamic study, ileal neobladder exhibited bigger capacity (WMD = -84.93, 95%CI: -160.36 to -9.50), lower pressure at capacity (WMD = 11.18, 95%CI: 4.29-18.06), better compliance (WMD = -25.55, 95%CI: -32.45 to -18.64), and greater post-void residual volume(WMD = -23.48, 95%CI: -36.75 to -10.21); There was no significant difference in the max voiding flow rate or void volume between the two groups (WMD = -1.00, 95%CI: -3.73-1.73) (WMD = -27.00, 95%CI: 70.05-16.06). No significant difference was found in the serum creatinine between the two groups (WMD = -0.05, 95%CI: -0.12-0.03).

CONCLUSIONS

Ileal neobladder seems able to provide more favorable patient's satisfaction, while sigmoid neobladder may provide a better chance of spontaneous voiding. This meta-analysis may provide some useful evidences for urological surgeons to choose the ideal bladder substitute for patients underwent radical cystectomy.

Robotic Intracorporeal Orthotopic Neobladder: Urodynamic Outcomes, Urinary Function, and Health-related Quality of Life

BACKGROUND

Intracorporeal orthotopic neobladder (iONB) creation following robotic radical cystectomy is an emerging procedure and robust functional data are required.

OBJECTIVE

To evaluate urodynamic features of iONB and bladder cancer-specific and general health-related quality-of-life (HRQOL) outcomes.

DESIGN, SETTING, AND PARTICIPANTS

We retrospectively assessed 28 men who underwent iONB creation (January 2012 to October 2013) and compared results to a previously characterized cohort of 79 of open ONB procedures.

OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS

iONB pressure-volume properties were characterized using multichannel urodynamics (UDS). The Bladder Cancer Index (BCI) questionnaire, modified with mucus- and pad-related questions, and the Short Form Health Survey (SF-36) were used to evaluate urinary function and HRQOL. ONB cohorts were compared for functional outcomes and BCI score. Multivariable linear regression was used to assess predictors of BCI score.

RESULTS AND LIMITATIONS

The median follow-up was 9.4 mo for the iONB and 62.1 mo for the open ONB group (p<0.0001); ≥2-yr follow-up had been completed for one (4%) patient in the iONB group compared to 75 (95%) patients in the open ONB group (p<0.0001). In UDS tests, the iONB group had minimal postvoid residual volume, normal compliance, and a mean capacity of 514 cm(3) (range 339-1001). BCI mean scores for urinary function (p=0.58) and urinary bother (p=0.31) were comparable between the groups. The surgical approach was not associated with the BCI score on multivariable analysis. Rates of 24-h pad use were comparable between iONB and open ONB groups (pad-free 17% vs. 19%; ≤2 pads 84% vs. 79%), as reflected by total pad usage (p=0.1); pad size and daytime wetness were worse in the iONB group. The clean intermittent catheterization rate was 10.7% in the iONB and 6.3% in the open ONB group. Limitations include the retrospective comparison, small number of patients and short follow-up for the iONB group.

CONCLUSIONS

iONB had adequate UDS characteristics and comparable bladder cancer-specific HRQOL scores to open ONB. However, pad size and daytime wetness were worse for iONB, albeit over significantly shorter follow-up.

PATIENT SUMMARY

We demonstrate that the volumetric and pressure characteristics are acceptable for a neobladder created using an entirely robot-assisted laparoscopic technique after bladder removal for cancer. Urinary function and quality-of-life outcomes related to the robotic technique were compared to those for neobladders created via an open surgical technique. We found that urinary function and bother indices were comparable; however, the robotic group required larger incontinence pads that were wetter during the daytime. This may be explained by the significantly shorter duration of recovery after surgery in the robotic group.

Real-time MRI of continent and stress incontinent male patients after orthotopic ileal neobladder

INTRODUCTION

The aim of this study was to correlate anatomic differences with continence status in male patients after cystoprostatectomy and ileal neobladder using real-time magnetic resonance imaging.

PATIENTS AND METHODS

Anatomic differences of 14 male patients (7 daytime continent and 7 stress incontinent) with ileal neobladder were determined by measuring the orthogonal distance of the bladder neck to the pubococcygeal line (PCL) to correlate anatomic differences with continence status.

RESULTS

The median distance of the bladder neck to PCL was +5.4 mm in continent patients before voiding whereas in incontinent patients it was +2 mm (p = 0.012). During the Valsalva maneuver, the median distance in continent patients was +4 and in incontinent patients -3 mm (p = 0.003). At the end of micturition, the median distance was +2.3 mm in continent patients and -12 mm in incontinent patients (p = 0.002).

CONCLUSIONS

The bladder neck in incontinent patients showed more pronounced mobility in relation to the PCL during micturition and the Valsalva maneuver as compared to continent patients. In addition, the ileal neobladder was positioned significantly lower in the pelvis of incontinent patients. These preliminary results suggest that a stable bladder neck may be an important factor to reach full continence in patients with ileal neobladder.