The aim was to evaluate bladder volume measurement using computerized
calculation in comparison with usual formulas. Twenty-eight volunteers
underwent bladder ultrasonography, which was recorded for computerize
d measurement of bladder volume. From diameters and/or areas measureme
nts, bladder volume was calculated using 12 different formula. True bl
adder volume was obtained from voided volume measurement. Computerized
measurement was not more accurate than formulas. No formulas displaye
d association of low percentage error and standard deviation and good
accuracy. The best accuracy was obtained with the combined formula F12
([(DSc x DAPc x DT x 0,523) + (DT x AS)] /2). Formula (F4) using the
three diameters, with reference to anterior bladder recessus and 0.625
correction factor displayed good results on the average.