[Perineometry and stress incontinence].

The authors have examined 20 patients with genuine stress incontinence and urogenital prolapse and 20 control subjects searching a difference between static and dynamic condition of the pelvic floor. They used a simple device to study the mean position of the perineal plane both at rest and under switch. In incontinent patients the perineal plane is always below the bituberal plane (+1.17 cm at rest and +1.32 cm straining). These values are on a higher plane in the control subject (-0.64 cm at rest and +0.48 cm upon straining). These differences have an highly significant statistical value (P = 0.0002 and P = 0.001).