![]() ![]() ![]() The probe is placed on the gel and directed toward the bladder. With the patient supine, ultrasound gel is placed on the suprapubic area. The technique of PVR measurement using a bladder scanner is straightforward. The device is easily portable on a movable stand, and a single instrument can serve an entire office or department. However, the device must be calibrated periodically, and the initial financial outlay may be significant. Nevertheless, while moderately expensive, the device has proven cost-effective over time and facilitates patient care in primary care facilities and specialist offices. In addition, the technique is simple to learn and takes only a few minutes to perform. It is a simple, noninvasive approach to measuring the PVR and is usually the preferred approach when available. Portable Dedicated Bladder Ultrasound DeviceĪ portable dedicated bladder ultrasound device, commonly known as a bladder scanner, uses ultrasound to measure the three-dimensional volume of urine in the bladder. Urinary catheterization is the gold standard for measuring the PVR but is invasive and has several other disadvantages compared to ultrasound. Measurement of the PVR determines the quantity of urine remaining in the bladder shortly after a voluntary void this measurement can be obtained using a portable dedicated bladder scanner, a formal bladder ultrasound examination, or by directly measuring the urine volume via urinary catheterization. Measurement of the post-void residual volume (PVR) immediately after voiding is crucial for an accurate result, with delays of as little as 10 minutes from bladder emptying to PVR determination potentially causing clinically significant overestimation of the volume.
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