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Updated: Dec 2, 2025
05:25
Ultrasonography of the Adult Male Urinary Tract for Urinary Functional Testing
Published on: August 14, 2019
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Accuracy of Measuring Bladder Volumes With Ultrasound and Bladder Scanning.
Marilyn Schallom1, Donna Prentice1, Carrie Sona1
1Marilyn Schallom is director of research, Donna Prentice is a research scientist, Kara Vyers is a research coordinator, and Cassandra Arroyo is a statistician in the Department of Research and Carrie Sona is a clinical nurse specialist in the Department of Surgical Services, Barnes-Jewish Hospital, St Louis, Missouri.
Summary
Accurate bladder volume measurement is key for urinary catheter removal. Ultrasound (US) and bladder scanning show promise, but abdominal fluid can affect accuracy, especially with bladder scanning.
Area of Science:
- Critical Care Medicine
- Medical Imaging
- Nephrology
Background:
- Accurate noninvasive bladder volume measurement is crucial for urinary catheter removal.
- Patients with acute kidney injury may present with low bladder volumes or ascites, potentially impacting measurement accuracy.
Purpose of the Study:
- To compare the accuracy of bladder scanning and 2D ultrasound (US) against urinary catheterization for measuring bladder volumes.
- To evaluate accuracy across different clinician types.
Main Methods:
- Prospective correlational descriptive study involving 73 adult critical care patients.
- Bladder volumes measured by physicians/nurses using US, nurses using bladder scanning, and urinary catheterization.
- Statistical analyses included Bland-Altman and chi-squared tests.
Main Results:
- Ultrasound (US) showed a bias of -1.3 mL and bladder scanning a bias of 3.3 mL compared to catheterization.
- US was more accurate for decisions in patients with abdominal fluid and low bladder volumes (97%-100%).
- Bladder scanning was more accurate for decisions in patients with high bladder volumes (≥300 mL, 94%-100%).
Conclusions:
- Both bladder scanning and US can accurately measure bladder volume.
- Abdominal fluid is a confounding factor that limits the accuracy of bladder scanning.
- Clinical decisions regarding catheterization are influenced by the measurement method and patient characteristics.
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