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Practical points

Authoring team

To maximise the usefulness of the information obtained:

  • get the patient to attend with a full bladder
  • arrange for the study to be conducted in relatively normal surroundings - ideally, a normal lavatory with the recording equipment out of site
  • a minimum of 200 ml of urine should passed - at low volumes, the flow rate is reduced making interpretation misleading
  • interpret the results against a normogram derived from a large number of normal flow rates

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