Uroflowmetry in asymptomatic elderly males.

Uroflowmetry is important in the evaluation of prostatism. We have investigated 93 men, selected at random from the National Register, who had no subjective voiding problems but who fell within the appropriate age range. The sample was representative of the male metropolitan population. Uroflowmetry was carried out and the data are presented graphically in nomograms where the Q max/volume, Q average/volume and Q max time/volume relations are given. Flow variables were evaluated to delineate possible correlations to age. It was found that the median Q max decreased from 18.5 ml/s at the age of 50 years to 6.5 ml/s at 80 years. Only one-third of the group had a Q max exceeding 15 ml/s. The median voided volume was 208 ml. Half of the subjects voided less than 200 ml and one-third less than 150 ml.