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What is Urodynamics? Urodynamics refers to the evaluation of the function of the lower urinary tract through the measurement of the pressure-flow relationship between the bladder and urethra.

Types of Urodynamic Studies

  • Uroflowmetry– measures urine in the bladder and flow rate.
  • Post-void residual measurement– assesses the volume of urine in the bladder after urination.
  • Cystometry– evaluates bladder function by measuring volume and pressure at initial filling, first desire to void, and maximum capacity. 
  • Leak point pressure measurement– assesses the pressure at which leakage is occurring.
  • Pressure flow study– measures pressure at which urination can take place and the speed of the urine flow.
  • Sphincter Electromyography– measures the electrical activity of nerves and muscles around the bladder.
  • Video urodynamic test– allows visualization of bladder filling and voiding using x–rays or ultrasound. 

Indications for Urodynamic testing

  • Urinary incontinence
  • Urinary retention 
  • Frequent urination
  • Urinary urgency
  • Intermittent urination
  • Frequent UTIs

Source: LCD – Nerve Conduction Studies and Electromyography (L35897). (n.d.). CMS.Gov. Retrieved May 30, 2022, from