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ICCS meeting
ICCS S1: LUT DYSFUNCTION
Moderators: Ann Raes (Belgium) & Luis Guerra (Canada)
ICCS Meeting on Thursday 15, October 2015, 14:00 - 15:00
14:00 - 14:06
ICCS S1-1
(LO)
CAN A QUANTITATIVE MEANS BE USED TO PREDICT FLOW PATTERNS:
AGREEMENT BETWEEN VISUAL INSPECTION VS. FLOW INDEX DERIVED FLOW
PATTERNS.
Jacob FRANCO
1
, Sang W HAN
2
, Eun CHOI
2
and Israel FRANCO
3
1) Stonybrook Medical College, Chappaqua, USA - 2) Severance Children's Hosipital, Pediatric Urology, Seoul, KOREA
(REPUBLIC OF) - 3) New York Medical College, Section of Pediatric Urology, Chappaqua, USA
PURPOSE
We recently derived a flow index (FI), which is based on an idealized normal voider. This normalized FI was found to
correlate well with 3 basic flow curves; bell, plateau and tower. Each pattern has well-defined cutoffs, which predicted
the flow curve. Our hypothesis is that FI derived flow patterns (FP) should have reasonable precision when we
compared to visual inspection FP.
MATERIAL AND METHODS
Patients known to have LUTS and or DV had uroflow parameters recorded along with FP, and PVR (by ultrasound). FI
was produced for each patient based off Normal voider estimated (NVE) Q
max
and Q
avg
. The FI was defined as Actual
Q/NVE Q. Using cutoffs defined in our previous publication for Bell, Plateau and Tower patterns we calculated Kappa (κ)
to determine the precision of our FI predictions. We evaluated Q
avg
and Q
max
FI to predict patterns for both sexes.
RESULTS
There were 145 male and 245 female flows available for analysis. We found that there was moderate agreement using
Q
max
FI for both sexes κ=0.41. Using Q
avg
to predict FP we found there was fair agreement for males (κ=0.38) and
slight agreement for females (κ=0.18).
CONCLUSIONS
We found that Q
max
FI is capable of providing moderate agreement between trained observers interpretations of uroflow
curves and a quantitative method to define flow patterns. A well-defined quantitative method that is capable of
providing true interobserver reproducibility and creates a consistent and reproducible means to judge studies appears to
be close at hand with this method.