A novel algorithm for the non-invasive detection of bladder outlet obstruction in men with lower urinary tract symptoms

Arab Journal of Urology
Fawzy FaragJohn Heesakkers

Abstract

To determine the ability of bladder wall thickness (BWT) in combination with non-invasive variables to distinguish patients with bladder outlet obstruction (BOO). Patients completed the International Prostate Symptom Score (IPSS) questionnaire and prostate size was measured by transrectal ultrasonography (US). Pressure-flow studies were performed to determine the urodynamic diagnosis. BWT was measured at 250-mL bladder filling using transabdominal US. Recursive partition analysis (RPA) recursively partitions data for relating independent variable(s) to a dependent variable creating a tree of partitions. It finds a set of cuts of the dependent variable(s) that best predict the independent variable, by searching all possible cuts until the desired fit is reached. RPA was used to test the ability of the combined data of BWT, maximum urinary flow rate (Qmax), post-void residual urine volume (PVR), IPSS, and prostate size to predict BOO. In all, 72 patients were included in the final analysis. The median BWT, voided volumes, PVR, mean Qmax, and IPSS were significantly higher in patients who had an Abrams/Griffiths (A/G) number of >40 (55 patients) compared to those with an A/G number of ≤40 (17 patients). RPA revealed that the combi...Continue Reading

References

Apr 1, 1991·The Journal of Urology·M B ChancellorS Axelrod
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May 3, 2006·Neurourology and Urodynamics·Matthias OelkeHessel Wijkstra
Jun 27, 2009·International Urogynecology Journal and Pelvic Floor Dysfunction·Hann-Chorng Kuo

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Software Mentioned

RPA
JMP®
IPSS

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