A bladder ultrasound pre- and post-void uses a non-invasive abdominal scan to measure bladder volume before and after urination and calculate the post-void residual (PVR). It detects urinary retention or incomplete emptying to guide diagnosis and management of conditions such as BPH, neurogenic bladder, UTIs, or catheter decisions. PVR is typically low—about 50–100 mL; higher volumes warrant further evaluation.

Yes. Ultrasound (bladder scanning) noninvasively measures post‑void residual (PVR) urine to detect urinary retention. Portable bladder scanners give rapid bedside estimates; accuracy is good but operator- and device-dependent. A PVR above commonly used thresholds (often >100–200 mL) suggests significant retention. It’s useful after catheter removal or for suspected voiding dysfunction and avoids catheterization for assessment.

Measure post-void residual (PVR) with a bladder ultrasound: have the patient void, then scan within 10 minutes with the patient supine. Apply gel and place the probe suprapubically to obtain transverse and sagittal views. Use the scanner’s automated volume readout or calculate length × width × height × 0.52. Record the volume; repeat if uncertain. PVR <50 mL is generally normal; >200 mL is clinically significant.

Normal post‑void residual (PVR) — the urine left in the bladder after urination — is generally under 50 mL. Volumes up to about 100 mL may be acceptable in older adults, while persistent PVRs above ~200 mL suggest clinically significant retention that needs evaluation. PVR is measured by bladder ultrasound (scan) or catheterization to guide management.

Treating post‑void residual depends on cause and volume. Start with behavioral measures: timed or double voiding, bladder retraining, pelvic‑floor physiotherapy and fluid adjustment. Review and stop offending drugs. For significant or symptomatic residuals use intermittent self‑catheterization or indwelling catheter; consider alpha‑blockers for men with BPH. Treat infections and refer for surgical or specialist management if needed.

Costs vary by country and facility. Typical private-lab ranges: India ₹300–1,500; United States $50–400; United Kingdom (private) £30–200. Public health systems or insurance often cover the test or reduce out‑of‑pocket expense. Final price depends on whether it’s a quick bladder scan or a full ultrasound, location, and facility—check with the testing center for exact fees.