The Calculation and Comparison of the Detrusor Contractility Parameter (vCE) and Watts Factor

Andrew Gammie, Darryl Kitney, Marcus Drake, Paul Abrams, Christopher Fry

Research output: Contribution to journalArticle (Academic Journal)peer-review

4 Citations (Scopus)
141 Downloads (Pure)

Abstract

Aims. To test the significance between a validated index of detrusor contractility, vCE, the Watts Factor, Bladder Outlet Obstruction Index (BOOI), and the Detrusor Contractility Parameter, t20-80; and to test whether t20-80 depends on outflow tract resistance.

Methods. Thirty-seven pressure-flow traces from 20 male and 17 female patients were analysed and forms of the Watts Factor, t20-80 and BOOI were compared with vCE.

Results. The Detrusor Contractility Parameter, t20-80, is significantly associated with vCE for both women and men without a high degree of bladder outlet obstruction. The Watts Factor only had a significant association with vCE at the point of maximum flow in women.

Conclusions. The detrusor contractility parameter, DCP (t20-80), can be measured easily from the pressure flow curves of a urodynamic test. The Watts Factor at maximum urine flow, WFQmax, can be readily calculated, but is only applicable to women. In both women and men without a high degree of bladder outlet obstruction, DCP is better associated with true detrusor contractility than any Watts Factor analysis.
Original languageEnglish
Pages (from-to)2745-2752
Number of pages8
JournalNeurourology and Urodynamics
Volume37
Issue number8
Early online date4 Jul 2018
DOIs
Publication statusPublished - Nov 2018

Structured keywords

  • Centre for Surgical Research

Keywords

  • bladder outlet obstruction
  • contractility
  • Wmax

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