152
29
th
CONGRESS OF THE ESPU
16:49–16:52
S20-2 (PP)
★
SENS-U: VALIDATION OF A WEARABLE ULTRASONIC
BLADDER MONITOR IN CHILDREN DURING URODYNAMIC
STUDIES
P.G. VAN LEUTEREN
1
, R WOLTJER
2
, T.P.V.M. DE JONG
3
and P DIK
1
1) University Children's Hospitals UMC Utrecht, Department of Paediatric Urology, Utrecht, NETHERLANDS -
2) Novioscan, Nijmegen, NETHERLANDS - 3) University Children's Hospitals UMC Utrecht and AMC Amsterdam,
Department of Paediatric Urology, Utrecht, NETHERLANDS
PURPOSE
Urinary incontinence is a frequent problem in school-age children. Since many children remain
unaware of a full bladder sensation, the SENS-U Bladder Monitor was invented. The SENS-U is
a small, wearable ultrasound sensor which is positioned on the lower abdomen by a skin-friendly
adhesive. The sensor continuously estimates the bladder filling status and informs the child when
it's time to proceed to the bathroom. In this study, the clinical performance of the SENS-U is evalu-
ated in children during (video)urodynamics.
MATERIAL AND METHODS
In this study, children (6–12 years) were included who were scheduled for a (video)urodynamic
study. During urodynamics, the SENS-U determined the average anterior - posterior bladder dimen-
sion (every 30 sec.) to estimate the filling status. The correlation between the average bladder
dimension and the infused volume is analyzed by Spearman's correlation.
RESULTS
30 patients (boys/girls: 15/15) [mean age: 7.9 ± 1.4 years] were included, in which the SENS-U de-
tected the full bladder prior to voiding in 90 % of the patients (27/30). In the other patients, the
bladder was outside the detection-area due to either erroneous sensor-placement (n=1) or an
obese abdomen in the upright position (n=2). There was a strong correlation (median R = 0.94)
between the average bladder dimension and the infused volume. The detectable voided-volume
ranged between 71–439 ml.
CONCLUSIONS
The SENS-U is able to detect a full bladder with a success-rate of 90 %. When excluding corrupted
data due to misplacement or an obese abdomen, the full bladder was detected in all patients. Future
research will focus on investigating the effect of the SENS-U in incontinence-training.