University of Twente Student Theses


Standardised, automatic description of uroflowmetry curve shapes

Haan, Job S. de (2020) Standardised, automatic description of uroflowmetry curve shapes.

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Abstract:The shape of uroflowmetry curves associates with voiding abnormalities. The lack of standardisation in flow shape description impairs diagnostic value. Therefore, algorithmic analysis that generates a shape description based on quantitative definitions for shape characteristics is proposed. A graphical user interface makes algorithmic evaluation insightful. Published quantitative flow shape are complemented with new proposals for standardised analysis. Objectivity is improved by basing them on expert consensus. Urologists interpreted shape characteristics of uroflowmetry curves together, resulting in a single assessment. Algorithmic performance and experience with the user interface are improved by obtaining expert evaluation with a questionnaire. This resulted in an algorithm based on quantitative threshold evaluation for shape characteristics. The generated description is comprised of the descriptors bell shape, fluctuating, intermittent and plateau flow and comments on symmetry and maximal flow. The user interface that makes the algorithm and the visualisation of parameters easily accessible is very well received. Algorithmic description of uroflowmetry curve shape makes application of standardised evaluation fast and simple. The user interface provides visual and textual substantiation for the generated description, encouraging the urologist to be involved in shape evaluation. This evaluation method improves the diagnostic value of uroflowmetry and is ready for clinical implementation.
Item Type:Essay (Master)
UMC Utrecht, Utrecht, The Netherlands
Faculty:TNW: Science and Technology
Subject:44 medicine, 50 technical science in general
Programme:Technical Medicine MSc (60033)
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