Bladder volume estimation in the elderly using a portable ultrasound-based measurement device.
ABSTRACT We assessed the accuracy and ease of use of the BladderScan (BVI 2000) portable ultrasound-based bladder volume measurement device in a geriatric outpatient population. The Geriatric Continence Clinic nurse and physician each made 73 measurements on 36 subjects. Although the correlation coefficients between the true and ultrasound measurements were highly significant the mean differences were significantly different from zero. We suggest that, rather than considering the correlation coefficient, the accuracy required of the device should be described by a function of estimated versus true bladder volume. This function should vary depending on each particular decision-making process in which the estimate of volume is to be used. This instrument automatically estimates bladder volume once the user has completed the image creation and selection part of the process. The users in this study had difficulties with this imaging process. Possible ways in which the device's automated signal processing and volume calculation algorithms could be improved became evident during this study and are discussed.
Article: The accuracy of ultrasonic estimation of bladder volume: A comparison of portable and stationary equipment 1 1 No commercial party having a direct financial interest in the results of the research supporting this article has or will confer a benefit upon the author(s) or upon any organization with which the author(s) is/are associated[Show abstract] [Hide abstract]
ABSTRACT: Huang Y-H, Bih L-I, Chen S-L, Tsai S-J, Teng C-H. The accuracy of ultrasonic estimation of bladder volume: a comparison of portable and stationary equipment. Arch Phys Med Rehabil 2004;85:138–41.
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ABSTRACT: Early, accurate diagnosis of bladder outlet obstruction in men with lower urinary tract symptoms may reduce the need for invasive testing (ie, catheter placement, urodynamics), and prompt early treatment to provide symptomatic relief and avoid complications.JAMA The Journal of the American Medical Association 08/2014; 312(5):535-42. DOI:10.1001/jama.2014.5555 · 30.39 Impact Factor
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ABSTRACT: To determine the accuracy of bladder volume (BV) measurement and to identify factors that influenced the ultrasound bladder scanner (UBS) measurement of BV in postpartum women compared with transurethral catheterization. Materials, methods and results: A total of 190 paired measurements were performed on 190 women aged between 16 and 47 years. Majority of the women (36.9%) were in their first parity (range: 1-9). The mean BV was 159.46 mL [standard deviation (SD) = 99.78; range: 17-593 mL] on three-dimensional (3D) UBS and 143.76 mL (SD = 104.89; range: 2-588 mL) on catheterization. The mean difference between the two values was 15.70 mL (SD = 69.31, p < 0.001). The Foley's catheter was clamped for a minimum of 30 minutes and a maximum of 260 minutes. The UBS measurements were highly correlated with the BV obtained by catheterization (r = 0.819; p < 0.001). There was no significant difference between UBS and catheterized volume in a different volume subgroup. There were 35 cases (18.2%) with the difference in measurement of more than 25%. Twenty-five cases were associated with a catheterized volume less than 50 mL. There were a total of 33 cases with true BV of less than 50 mL, and only eight cases (24.24%) had an accurate measurement. The UBS tends to overestimate BV between 2 and 270 mL in this group. There was a significant linear relationship between the difference in measurement and body weight and duration of clamping. Measurement of BV in immediate postpartum period using UBS is comparable with urethral catheterization. The accuracy of measurement is affected by body weight and increasing amount of BV.Taiwanese journal of obstetrics & gynecology 03/2014; 53(1):12-6. DOI:10.1016/j.tjog.2013.01.028 · 1.26 Impact Factor