[Correlation of bladder thickness on ultrasound with clinical and urodynamic data in symptomatic benign prostatic hyperplasia].
OBJECTIVE
Our objective is to verify the diagnostic usefulness of ultrasound measurement of the thickness of the bladder wall, and the correlation with clinical/ urodynamic findings in patients with symptomatic BPH.


METHODS
We performed a prospective cross-sectional study (cross-sectional study '') in a series of 74 males (age chi= 72.4 S = 7.1 (56-84 years) with symptomatic BPH. Patients completed the IPSS and determined the plasma level of PSAt (ng / ml). Before performing the urodynamic study, was determined by transabdominal ultrasonography (3.5 MHz transducer): prostate volume (cc) by the ellipsoid formula, and bladder wall thickness (mm) measured on the anterior bladder wall. Statistical analysis was performed using ANOVA, the Pearson correlation, and ROC curve.


RESULTS
It was a significant correlation of the sonographic thickness of the bladder wall with the IPSS (p = 0001, r = 0.38) (parameter in turn highly correlated with prostate volume and PSA (p = 0.01, r = 0.62)), as well as the detrusor hyperactivity (p = 0.03, r =0.21), cut off ROC curve: 3.85 mm. Instead, it was not shown a significant correlation between the sonographic thickness of the bladder wall and the urodynamic diagnosis of obstruction (Abrams and number Griffths p = 0223, r = 0.14) or the detrusor contractile power, measured in power at peak flow (Pw) (p = 0642 r =- 0.55), nor with age (p = 0303, r = 0.12). Neither correlation was observed with other non-invasive urodynamic measures (the maximum urinary flow flowmetry (p = 0318, r = 0.12) and percentage postmicturition residual (p = 0696, r = 0.05)).


CONCLUSIONS
The ultrasound measurement of bladder wall thickness, although it has not proved useful ness in our series in the diagnosis of the voiding phase (lower urinary tract obstruction and detrusor contractility impairment), on the contrary it can be introduced as a diagnostic technique for non-invasive studies in the alterations of the filling phase, in the form of detrusor hyperactivity in also patients with symptomatic BPH, and present a significant correlation with prostate growth.
Salinas Casado
Jesús
J
Servicio de Urología, Hospital Clínico de San Carlos, Universidad Complutense de Madrid, Madrid, España. jsalinascasado@yahoo.es
Méndez Rubio
Santiago
S
Campanario Pérez
F
F
Virseda Chamorro
Miguel
M
Martínez Urzay
Germán
G
Pelaquim
Humberto
H
Silmi Moyano
Angel
A
D000368:Aged; D000369:Aged, 80 and over; D003430:Cross-Sectional Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011470:Prostatic Hyperplasia / Q000175:diagnosis* / Q000503:physiopathology*; D014463:Ultrasonography; D001743:Urinary Bladder / Q000000981:diagnostic imaging* / Q000473:pathology*; D014563:Urodynamics