What does the "post-void residual" measure?

The post-void residual (PVR) measurement assesses the amount of urine remaining in the bladder after a person has completed urination. This assessment provides valuable insights into bladder function and can indicate issues such as urinary retention, where the bladder does not empty completely, or other underlying conditions affecting urinary tract health. By measuring the residual urine, healthcare providers can evaluate how well the bladder is functioning and whether further investigation or intervention may be needed.

In contrast, the other options generally refer to different aspects of urinary function. The volume of urine expelled during urination reflects one part of the bladder's work but does not capture residual volume. Bladder capacity pertains to the maximum volume the bladder can hold, which is unrelated to how much urine remains after voiding. Total daily urine output measures the overall quantity of urine produced within a 24-hour period and does not provide specific information about post-void residual volume.