The accuracy of clinical assessment of bladder volume (original) (raw)
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Accuracy of Measuring Bladder Volumes With Ultrasound and Bladder Scanning
American Journal of Critical Care, 2020
Background Removal of urinary catheters depends on accurate noninvasive measurements of bladder volume. Patients with acute kidney injury often have low bladder volumes/ascites, possibly causing measurement inaccuracy. Objective To evaluate the accuracy of bladder volumes measured with bladder scanning and 2-dimensional ultrasound (US) compared with urinary catheterization among different types of clinicians. Methods Prospective correlational descriptive study of 73 adult critical care patients with low urine output receiving hemodialysis or unable to void. Bladder volumes were independently measured by (1) a physician and an advanced practice registered nurse using US, (2) an advanced practice registered nurse and a bedside nurse using bladder scanning, and (3) urinary catheterization (cath). Bland-Altman and χ2 analyses were conducted. Results Mean (SD) cath volume was 171.7 (269.7) mL (range, 0-1100 mL). Abdominal fluid was observed in 28% of patients. Bias was −1.3 mL for US vs ...
Does the presenting bladder volume at urodynamics have any diagnostic relevance?
International Urogynecology Journal, 2009
The aim of this study is to assess the diagnostic relevance of the presenting bladder volume (PBV) at urodynamics in women. Its measurement is most accurately made by adding the voided volume at uroflowmetry and the postvoid residual. The study involved 1,140 women presenting for their initial urogynecological assessment. Multivariate analysis of the relationships between high or low PBVs and different clinical and urodynamic variables. Median PBV was 174 mL. In overall terms, women with lower PBVs (0-174 mL) are significantly more likely to be older, of lower parity (0-1), have the symptom of nocturia, and the final diagnoses of sensory urgency and detrusor overactivity. These women are significantly less likely to have posterior vaginal and apical vaginal prolapse. Women with higher PBVs (over 174 mL) are significantly less likely to have either bladder storage diagnoses. The relatively low median PBV might reduce the demonstration of clinical stress leakage and restrict the interpretation of uroflowmetry data.
Ultrasound estimated bladder weight in asymptomatic adult females
Urology journal, 2012
To estimate the bladder weight by automated ultrasound method (BladderScan BVM 9500) in adult females without lower urinary tract symptoms and to assess both the intra-observer and interobserver reproducibility of this method. Healthy volunteers were recruited in King Khalid University Hospital from hospital staff and patients attending the gynecological clinic over a period of six months. All women were screened for any lower urinary tract symptoms using a validated short version of Urinary Distress Inventory questionnaire. BladderScan BVM 9500 device (Diagnostic Ultrasound, Bothell, WA) was used to measure bladder wall thickness, bladder volume, and calculated bladder weight. Eighty-five women were included in the study. The mean age was 37.5 years (± 11.1). Mean bladder wall thickness (BWT) was 1.68 mm (95% confidence interval: 1.61 to 1.75) and the mean ultrasound-estimated bladder weight (UEBW) was 32.25 g (95% confidence interval: 31.7 to 32.8). The UEBW intra-observer (ICC: 0...
Accuracy of bladder scanning in the assessment of postvoid residual volume
Journal of obstetrics and gynaecology Canada : JOGC = Journal d'obstétrique et gynécologie du Canada : JOGC, 2009
To compare the accuracy of the 3D portable ultrasound with catheterization in the assessment of postvoid residual (PVR) urine volume among women in the urogynaecology clinic. A prospective study was performed, assessing 101 women. After the patient voided four ultrasound (US) assessments were carried out using the BladderScan BVI 3000; the patient was then catheterized. The reproducibility of the US measurements and the difference between the two methods were assessed using Bland and Altman plots. The strength of the relationship was measured by a simple Pearson correlation coefficient. The results showed that 3D scanner measurements were highly reproducible and were also found to correlate significantly with catheterized volume (r=0.79, 95% CI 0.70-0.85, P<0.001). The mean difference between the two methods was 12.9 mL (95% CI 5.5-20.2 mL, P<0.001). In determining PVR volumes, the portable ultrasound BladderScan BVI 3000 is an accurate alternative to bladder catheterization.
BJU International, 2004
from our and other published work; (ii) calculated C Trad for a normal bladder; (ii) showed that the variables necessary for assessing compliance correctly are D V, D P det , V cap,NL , and P cap,NL ; and (iii) showed that the relationship among these is the dimensionless number, N Wahl -1 , calculated as ( D V/V cap,NL )/ ( D P det /P cap,NL ). This value for individuals with a normal bladder was calculated, tabulated and graphed.
Journal of Ultrasound in Medicine, 2006
The purpose of this study was to evaluate the effect of premicturitional bladder volume (V 1) on postvoid residual urine volume (V 2) measurements and to assess the ideal V 1 for an accurate V 2 determination. Methods. Twenty-five healthy men without any urinary symptoms constituted the study group. Measurements by transabdominal ultrasonography for V 1 and V 2 were performed for each subject at 3 different phases, each of which was preceded by oral intake of 1000 mL of water and accompanied by "mild," "moderate," and "severe" sensations of micturition, respectively. Results. Mean ± SD V 1 and V 2 during the first, second, and third phases were 117.7 ± 70.3 and 1 ± 1, 356.2 ± 112.3 and 11.5 ± 12 and 639.6 ± 171.8 and 58.8 ± 35.2 mL, respectively. With 50 mL as the cutoff value for a pathologic V 2 , 15 (60%) men had V 2 in the third phase exceeding this value, whereas the same rate was calculated as 0% for either of the first 2 phases. No patient with V 1 of less than 540 mL had V 2 of greater than 50 mL. Conclusions. Postvoid residual urine volume measurements with an uncomfortably full bladder result in high false-positive postmicturitional residue values even in healthy young men. We strongly advise that V 1 measurements of the bladder be performed before V 2 measurements and that V 2 not be measured if V 1 is greater than 540 mL.
Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine, 2006
The purpose of this study was to evaluate the effect of premicturitional bladder volume (V1) on postvoid residual urine volume (V2) measurements and to assess the ideal V1 for an accurate V2 determination. Twenty-five healthy men without any urinary symptoms constituted the study group. Measurements by transabdominal ultrasonography for V1 and V2 were performed for each subject at 3 different phases, each of which was preceded by oral intake of 1000 mL of water and accompanied by "mild," "moderate," and "severe" sensations of micturition, respectively. Mean +/- SD V1 and V2 during the first, second, and third phases were 117.7 +/- 70.3 and 1 +/- 1, 356.2 +/- 112.3 and 11.5 +/- 12 and 639.6 +/- 171.8 and 58.8 +/- 35.2 mL, respectively. With 50 mL as the cutoff value for a pathologic V2, 15 (60%) men had V2 in the third phase exceeding this value, whereas the same rate was calculated as 0% for either of the first 2 phases. No patient with V1 of less than ...
Medical Journal of Shree Birendra Hospital, 2019
Introduction: The Post Void Residual Urine volume (PVRU) is frequently significant in patients with bladder outflow obstruction; especially in patients with enlarged prostate and prostatism. The PVRU forms an important part of radiological investigation. Accurate measurement of the residual urine volume changes observed serially over a period of time may indicate clinical progress. The purpose of this study was to evaluate the effect of pre-void bladder volume on PVRU measurements. Methods: A prospective study was conducted to determine the accuracy of PVRU measurement in patient presenting with lower urinary tract symptoms (LUTS). 50 patients with LUTS were assessed ultrasonographically for pre void and post void bladder volumes during the study period of March 2017 till August 2017. PVRU measurements done in patients with bladder filling sensation at moderate to full capacity resulted in high estimations of PVRU which was quite significant in this study. Results: There was significant difference in the estimated PVRU between patients having high initial premicturitional volume (546±144 ml) than those with lower or moderate filling volume (261±58 ml) with mean of 173 ml and 35 ml respectively. The difference in estimated PVRU was highly significant with p value of < 0.0001. Conclusions: Measurement of pre void urinary bladder volume with an uncomfortably full bladder results in high post micturitional (PMRU) values even in most patients without lower urinary tract symptomswhich may be false-positive. We advise that initial or pre-void urine volume be measured when the patient has initial or moderate feeling of bladder fullness.
Bladder volume determination: Portable 3-D versus stationary 2-D ultrasound device
Archives of Physical Medicine and Rehabilitation, 2000
Objective: To investigate how accurately a portable threedimensional (3-D) scanner and a multipurpose two-dimensional (2-D) real-time scanner determined bladder volumes. Study Design: Prospective, controlled clinical trial, singleblind, crossover design. Setting and Participants: Twenty-three inpatients with permanent bladder catheters participated voluntarily in this study. Methods: The bladders of 20 patients were filled through an indwelling catheter with 60, 110, 160, 210, and 260mL sterile normal saline. Volumes were measured twice with each device. Measurements were compared with the actual bladder volumes. Results: The 2-D device showed better reproducibility, particularly at lower bladder volumes. The 3-D scanner showed a significant difference between the two measurements at 160mL (p Ͻ .05) and had poor reproducibility at 110, 210, and 260mL. Both devices overestimated actual bladder volume at fillings of Ͻ160mL and underestimated it at fillings of Ն160mL. The range between the 25th and 75th percentiles was always larger for the 3-D scanner, except for the 210mL reading. Conclusion: Both devices showed sufficient accuracy for clinical practice. Ultrasound measurements of Ͼ110mL should be followed by catheterization to detect potentially harmful bladder volumes.