Lower urinary tract dysfunction produces a huge burden on sufferers in particular and on society in general. Lower urinary tract symptoms have a high prevalence in the community: 5% of children aged 10 wet the bed, while 15% of women and 7% of men have troublesome incontinence; and in elderly men of 75, benign prostatic hyperplasia occurs in more than 80% of indivi- als, with benign prostatic enlargement coexisting in up to half this group and half of these having bladder outlet obstruction. The confusion felt in many people s minds as to the role of urodynamics has receded for the most part....