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CONGRESS OF THE ESPU
MATERIAL AND METHODS
Between July 2015 and July 2017 we prospectively evaluated bladder function of all infants
(0–3 months) with PUV after primary resection using 4-hour voiding observation. Voiding pattern,
number of voids, voided volume (VV) and immediate post void residual (PVR) were recorded.
Estimated bladder capacity (eBC) was determined using Capacity (ml) = 7 × weight (kg) (Fairhurst
et al. J Pediatr Surg1991;26(1):55–7). Large and small BC were defined as >150 % and <65 %
eBC respectively. All results given as median (range).
RESULTS
Twenty-one male infants, median age 21 days (5–94 ) were included. Four hour voiding obser-
vation was performed within 7 days (median 1 day) after catheter removal post primary valve
resection. Babies voided an average 5 times during the 4 hour study, but with great variability
(2–15 voids). Bladder capacity (BC) was large in 10 (47 %) and small in 2 (9.5 %)andmedian ratio
BC/eBC=1.25 (0.58–5). Median residual urine was 8 ml (0–120). In 9 babies (43 %) PVR was
larger than VV. Ten babies (47 %) emptied their bladders almost completely at least once during the
study. Interrupted stream was recorded in 7 babies (33 %). After the assessment 7 (33 %) babies
were started on Clean Intermittent Catheterization (CIC) and 1 was commenced on anticholinergic
medication.
CONCLUSIONS
Following valve resection, babies have variable voiding patterns and more than half have incom-
plete bladder emptying and abnormal bladder capacity compared to the expected for age.
16:35–16:47
Discussion