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Vol. 43. Issue 3.
Pages 137-142 (April 2019)
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Vol. 43. Issue 3.
Pages 137-142 (April 2019)
Original article
Preoperative magnetic resonance imaging in predicting early continence recovery after robotic radical prostatectomy
La resonancia magnética preoperatoria predice la recuperación temprana de la continencia urinaria tras la prostatectomía radical robótica
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L. Regisa,
Corresponding author
lregis@vhebron.net

Corresponding author.
, A. Salazara, M. Cuadrasa, E. Mireta, S. Rocheb, A. Celmaa, J. Planasa, D. Lorentea, J. Placera, E. Trillaa, J. Morotea
a Departamento de Urología, Hospital Universitari Vall d’ Hebron, Universitat Autonoma de Barcelona, Barcelona, Spain
b Institut de Imatge i Diagnostic, Hospital Universitari Vall d’ Hebron, Universitat Autonoma de Barcelona, Barcelona, Spain
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Figures (2)
Tables (4)
Table 1. Clinical and demographic characteristics of the patient cohort.
Table 2. Urinary continence rates according to continence criteria.
Table 3. Univariate analysis at 1, 6 and 12 months after removal of the urinary catheter.
Table 4. Multivariate analysis: urinary continence at 6 months.
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Abstract
Introduction and aims

Urinary incontinence is a common complication after radical prostatectomy. The aim of our study was to describe the preoperative anatomical features using magnetic resonance imaging in order to predict early continence recovery after robotic radical prostatectomy.

Material and methods

72 patients who underwent robotic radical prostatectomy were prospectively analysed. EPIC questionnaire (1, 6 and 12 mo) and first self-reported continence were used to assess functional outcomes. Membranous urethral length (MUL) and MUL-prostate axis angle (aMULP) were assessed preoperatively on T2 weighted sagittal images.

Results

Continence rate was 67.2%, 92.6% and 95.2% at 1, 6 and 12 months, respectively. Early continence was achieved in patients with the lower aMULP. At 1 month, average aMULP in continent patients was 107.21° (CI 95% 90.3–124.6) vs. 118.5° (CI 95% 117.7–134) in incontinent ones (p=0.014). At 6 month differences in aMULP among groups were found: 114.24° (CI 95% 104.6–123.9) in continents vs. 142° (CI 95% 126.5–157.6) in incontinents (p=0.015). At 12 month, continent group showed a significantly higher preoperative aMULP. aMULP was revealed as the only independent predictor of urinary continence at 6 mo in multivariate analysis, OR 0.007 (CI 95% 0.002–0.012), p=0.012.

Conclusions

Preoperative anatomical parameters assessment prior surgery can help to identified those patients will achieve early continence recovery and it supports therapeutic decisions making.

Keywords:
Prostate cancer
Radical prostatectomy
Urinary incontinence
Magnetic resonance imaging
Robotic surgery
Abbreviation:
CI
Resumen
Introducción y objetivos

La incontinencia urinaria es una de las principales complicaciones tras la prostatectomía radical. El objetivo del estudio fue describir las características anatómicas, evaluadas preoperatoriamente mediante resonancia magnética, que permitan predecir la recuperación precoz de la continencia urinaria tras la prostatectomía radical asistida por robot.

Material y métodos

Se analizó prospectivamente a 72 pacientes tratados mediante prostatectomía radical asistida por robot. Los resultados funcionales se evaluaron mediante los cuestionarios EPIC (1, 6 y 12 meses) y la fecha de primera continencia autoinformada. La longitud de la uretra membranosa (LUM) y el ángulo entre la LUM y el eje prostático (aLUMP) fueron evaluados preoperatoriamente en imágenes sagitales ponderadas en T2.

Resultados

La tasa de continencia fue del 67,2, el 92,6 y el 95,2% a 1, 6 y 12 meses, respectivamente. Los pacientes con valores de aLUMP inferiores alcanzaron continencia urinaria temprana: al mes, los continentes habían tenido una aLUMP media de 107,21° (IC del 95% 90,3-124,6), mientras que entre los que presentaban incontinencia era de 118,5° (IC del 95% 117,7-134); p=0,014. Hemos encontrado diferencias en el aLUMP entre los grupos según la continencia a los 6meses: ángulo en continentes de 114,24° (IC del 95% 104,6-123,9), mientras que en los incontinentes había sido 142° (IC del 95% 126,5-157,6), p=0,015. A los 12 meses, los continentes tenían una LUM preoperatoria significativamente superior a los incontinentes. En el análisis multivariante solamente el aLUMP fue un predictor independiente de continencia urinaria a los 6 meses OR 0,007 (IC del 95% 0,002-0,012), p=0,012.

Conclusiones

La evaluación de parámetros anatómicos preoperatorios previos a la cirugía puede ayudar a definir qué pacientes recuperarán la continencia urinaria precozmente, auxiliando a la toma de decisiones terapéuticas.

Palabras clave:
Cáncer de próstata
Prostatectomía radical
Incontinencia urinaria
Resonancia magnética
Cirugía robótica

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