The Wardill test: does it predict future voiding flow?

A prospective study was undertaken to assess the predictive value of measuring the peak flow rate at completion of a transurethral prostatectomy with suprapubic pressure (the Wardill test). Twenty-six patients had their expressed flow rate measured on applying a standardised suprapubic pressure and compared to their peak flow rate measured at least 6 weeks postoperatively. No significant correlation was found to exist between the two variables.