The Pressure Flow Study

  • Kirk M. AndersonEmail author
  • David A. Hadley


The urodynamic test that assesses the voiding phase of bladder function is the pressure-flow study. Under normal conditions, a coordinated detrusor contraction and non-obstructive outlet results in a predictable low pressure, high flow pattern. A high pressure-low flow state is seen in patients with an obstructive bladder outlet. Low pressures-low flow states are seen in conditions of poor or absent detrusor contractility. The primary utility of the pressure-flow study is using the results to differentiate patients with an obstructive vs. non-obstructive flow pattern. Nomograms have been developed which are used to classify patients based on pressure-flow patterns.


Urodynamics Urination disorders Urethral obstruction Prostatic hyperplasia Lower urinary tract symptoms 


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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  1. 1.Department of UrologyUniversity of ColoradoAuroraUSA
  2. 2.Loma Linda UrologyLoma Linda University Medical CenterLoma LindaUSA

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