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Vol. 34. Issue 4.
Pages 365-371 (January 2010)
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Vol. 34. Issue 4.
Pages 365-371 (January 2010)
“Postmicturition residual; Urodynamic”
«Correlaciones urodinámicas del residuo posmiccional»
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S. Méndez-Rubio
Corresponding author
santiago.mendez@telefonica.net

Author for correspondence.
, L. Chiarelli, J. Salinas-Casado, S. Cano, M. Virseda-Chamorro, J.C. Ramírez, F. Campanario, Á. Silmi-Moyano
Urology Service, Hospital Clínico de San Carlos, Universidad Complutense de Madrid, Madrid, Spain
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Abstract
Objectives

To study the possible correlation between postvoid residual urine volume (PVR) and other urodynamic parameters.

Material and methods

A retrospective study in a series of 121 patients (33 male, 88 female), aged 68.22 years (SD 12.904; 16–90 years), with significant PVR underwent video-urodynamic testing. All cases of neurogenic vesicourethral dysfunctions and post radiotherapy of the pelvis were excluded. Statistical correlations were analyzed between the PVR and urinary symptoms, urodynamic data, and findings in the physical examination. Descriptive and correlative statistical analyses were done (Spearman's Rho and comparison of medians [chi-square]).

Results

We found a positive correlation (men and women) between PVR and bladder capacity (p=0.001), between PVR (free uroflowmetry) and PVR (detrusor pressure-flow test) (r=0.450 p=0.001). In women, a positive correlation was found between PVR and urethral resistance (p=0.001), and between PVR and voiding by abdominal pressure (p<0.05). In men, we found a negative correlation between PVR and detrusor isotonic contractility (W80–W20) (p<0.05). No statistically significant correlation has been found between PVR and cystomanometry, urodynamic diagnosis of obstruction, associated radiological findings, overactive bladder, or voiding symptoms in men.

Conclusions

Urodinamically, PVR behaved more as a measure of detrusor contractility than as a parameter of lower urinary tract obstruction. PVR was not associated with any specific clinical or radiologic finding.

Keywords:
Postvoid residual volume
Urodynamic
Lower urinary tract obstruction
Detrusor contractility
Resumen
Objetivos

Estudiar la correlación entre la existencia de residuo posmiccional (rp) con otros parámetros urodinámicos.

Material y métodos

Estudio retrospectivo. 121 pacientes (33 V, 88 M). Edad = 68,22 y S = 12,904 (16–90 años) que presentaban rp realizándose estudio videourodinámico completo. Se excluyeron disfunciones neurógenas vesicouretrales y posradioterapia pélvica. Se estudiaron correlaciones estadísticas entre residuo y síntomas, parámetros urodinámicos y hallazgos de la exploración física. Se ha realizado estadística descriptiva y correlaciones (rho de Spearman y comparación de medianas [chi cuadrado]).

Resultados

Se encontró correlación positiva (hombres y mujeres) entre rp y capacidad vesical (p = 0,001), entre rp (flujometría libre) y el rp (test pdet/flujo) (r = 0,450 p = 0,001). En mujeres se encontró correlación positiva entre rp y resistencia uretral (p = 0,001) y entre rp y micción con prensa abdominal (p < 0,05). Se encontró correlación negativa (hombres) entre rp y parámetros de contracción isotónica del detrusor (W80–W20) (p < 0,05). No se ha encontrado correlación entre rp y parámetros cistomanométricos, ni con el diagnóstico urodinámico de obstrucción, semiología radiológica asociada, vejiga hiperactiva, ni síntomas funcionales de vaciamiento en el hombre.

Conclusiones

El rp urodinámicamente se comportó más como un parámetro de medida de contractilidad del detrusor que como un parámetro de obstrucción del tracto urinario inferior. El rp no presentó ninguna semiología clínica ni radiológica asociada específica.

Palabras clave:
Residuo posmiccional
Urodinámica
Obstrucción del tracto urinario inferior
Contractilidad del detrusor

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