Objective patterning of uroflowmetry curves in children with daytime and nighttime wetting.
OBJECTIVE
Pediatric uroflowmetry curve interpretation is incompletely standardized. Thus, we propose new, objective patterning.


METHODS
Uroflowmetry curves were obtained in 100 children presenting with daytime incontinence or enuresis. Each curve was compared with a standard curve generated from a published nomogram and a new patterning method was formulated. Staccato and interrupted patterns were defined using International Children's Continence Society criteria. The remaining curves were divided by the deviation of the maximal flow rate from the median nomogram value as certain patterns, including tower-greater than 130%, not abnormal-70% to 130% and plateau-less than 70%. The correlation between the presenting symptom and patterns or other uroflowmetry parameters was evaluated. Six pediatric urologists also patterned the same curves subjectively.


RESULTS
All curves could be classified as 1 of the defined patterns using this method. Pattern distribution reflected the spectrum of presenting symptoms with more tower, interrupted and staccato patterns in children with daytime wetting than in those with monosymptomatic enuresis. Age adjusted voided volume was also smaller in the former group but post-void residual urine, and maximal and average flow rates did not correlate with presenting symptoms. Subjective patterning showed marked interobserver differences. When patterning applied by the current method was used as a reference, observer sensitivity for abnormal patterns inversely correlated with specificity.


CONCLUSIONS
Subjective uroflowmetry patterning is liable to personal bias. The proposed method enables objective patterning that complies with International Children's Continence Society standardization and clinical presentation.
Kanematsu
Akihiro
A
Department of Urology, Kyoto University, Kyoto, Japan. aqui@kuhp.kyoto-u.ac.jp
Johnin
Kazuyoshi
K
Yoshimura
Koji
K
Okubo
Kazutoshi
K
Aoki
Katsuya
K
Watanabe
Masato
M
Yoshino
Kaoru
K
Tanaka
Shiro
S
Tanikaze
Saburo
S
Ogawa
Osamu
O
D000293:Adolescent; D002648:Child; D053207:Diurnal Enuresis / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D053206:Nocturnal Enuresis / Q000503:physiopathology*; D012015:Reference Standards; D012212:Rheology; D014563:Urodynamics