Normal volume of the full bladder = 500 mL
How do we know if a patient has urinary retention?
- PVR > 250
- Gotta know how much they started with and how much is PVR (e.g., voided 600 with a 400 mL PVR = they had a liter in there!)
Follow PVRs closely in spinal injured patients!
If pt routinely having high PVRs but can void – have them void more frequently! (e.g. q 2 hours)