Carbon dioxide uroflowmetry.

A method using pneumatic compression to determine flow rate is described. The procedure is best suited for physicians using carbon dioxide instrumentation for a urodynamic assessment of patients since the carbon dioxide cystometer is readily converted to a uroflowmeter. Values obtained with this method are similar to values reported in the literature using other techniques. When voided volumes are more than 200 ml. the values for peak flow rate are reproducible within subjects and are volume-dependent.