Does catheter size affect pressure–flow studies in women with lower urinary tract symptoms?

Asnat Groutz

This article has no abstract so we have provided the first paragraph of the full text.

The PFS is considered to be the best method to assess the voiding phase of the micturition cycle. Ideally, the flow pattern in a PFS should be representative of the equivalent noninvasive, or free-flow, uroflowmetry in a given patient. Factors associated with the pressure–flow technique and setting, however, can affect the voiding process. Specifically, the use of a transurethral catheter could potentially cause urethral irritation, relative BOO, or both, during the study. Previous studies suggested that the presence of 7 Fr or 6 Fr transurethral catheters have a profound effect on uroflow, falsely increasing the prevalence of urethral obstruction in women undergoing PFS.^{1, 2}

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