Criteria for differentiation of normal and abnormal uroflowmetrograms in adult men.
OBJECTIVE
To study parameters which serve as criteria for differentiation of normal and abnormal uroflowmetrograms.


METHODS
A total of 105 subjects were investigated, 43 of whom had no symptoms of dysuria, 57 of whom had dysuria demonstrated as an abnormal uroflowmetrogram, subjective symptoms and a small residual urine volume, and five patients who were about to undergo transurethral resection of the prostate. The three parameters used to specify the shapes of the uroflowmetrogram curves were: (i) the ratio of the maximum flow rate (Qmax) and the voiding time (T100), Qmax/T100; (ii) the ratio of the time to peak flow (TQmax) and the voiding time, TQmax/T100; and (iii) the newly introduced voiding efficiency (epsilon), measured by the ratio of the voided volume (VV) and T100 x Qmax, epsilon = VV/(T100 x Qmax), were taken for each patient.


RESULTS
The criteria for normal uroflowmetrograms were: Qmax/T100 > or = 0.78, 0.32 < or = TQmax/T100 < or = 0.54, 0.63 < or = epsilon < 1, respectively. In the patients who underwent transurethral resection of the prostate the values of all three parameters improved and returned almost to normal after operation.


CONCLUSIONS
Using these three parameters the micturition pattern can be expressed quantitatively.
Nishimoto
K
K
Department of Urology, Osaka Teishin Hospital, Japan.
Iimori
H
H
Ikemoto
S
S
Hayahara
N
N
D000328:Adult; D006801:Humans; D008297:Male; D011184:Postoperative Period; D011468:Prostatectomy; D012016:Reference Values; D013997:Time Factors; D014554:Urination / Q000502:physiology*; D014555:Urination Disorders / Q000175:diagnosis / Q000503:physiopathology*; D014563:Urodynamics / Q000502:physiology*