Is there a PVR cutoff or “percent empty” cutoff you use to determine if an asymptomatic patient needs a Foley catheter?

There is no universal, evidence-based cutoff that mandates Foley catheterization in an asymptomatic patient based on PVR alone. Clinical judgment integrating voiding function, upper tract status, renal function, UTI history, and patient preference guides the decision.

The PVR is one data point, not a mandate. A clinical benchmark of >300 mL on repeated measurements may be a trigger for considering intervention. Many major studies on Botox, for example, use PVRs >200-200 mL as exclusion criteria ...