Three-dimensional ultrasound fetal urinary bladder volume measurement: reliability of rotational (VOCALTM) technique using different steps of rotation

Peixoto‐Filho, Fernando Maia; Sá, Renato Augusto Moreira de; Lopes, Laudelino Marques; Velarde, Luís Guillermo Coca; Marchiori, Edson; Ville, Y.

doi:10.1007/s00404-007-0360-2

Cited by 37 publications

(46 citation statements)

References 19 publications

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“…These findings are in agreement with those reported by Raine-Fenning et al, 9 Peixoto-Filho et al, 23 Rousian et al, 20 and Cheong et al 10 All methods were also valid, without significant differences between the volumes obtained using the multiplanar, VOCAL, and XI VOCAL (5, 10, 15, and 20 planes) methods for all 3 objects (sphere, regular cylinder, and irregular cylinder). However, all measurements performed by both examiners tended to overestimate the real volumes of the sphere and irregular cylinder on average by 2.89%.…”

Section: Discussionsupporting

confidence: 82%

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Reliability and Validity of In Vitro Volume Calculations by 3-Dimensional Ultrasonography Using the Multiplanar, Virtual Organ Computer-Aided Analysis (VOCAL), and Extended Imaging VOCAL Methods

Barreto

Milani

Júnior

et al. 2010

Journal of Ultrasound in Medicine

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Objective. The purpose of this study was to assess the reliability and validity of in vitro volume calculations by 3‐dimensional ultrasonography. Methods. This observational study was performed by 2 examiners to obtain volumes of 3 objects of different shapes and sizes filled with ultrasound gel and immersed in water. The examiners used the multiplanar (5‐mm interval), virtual organ computer‐aided analysis (VOCAL, 30°) and extended imaging (XI) VOCAL (5, 10, 15, and 20 planes) methods to estimate the volumes of each object. A paired Student t test (P) and intraclass correlation coefficients (ICCs) were used to assess reproducibility of the methods. Validity was assessed comparing the percent differences between the estimated and the real volumes using the P value, mean differences, and ICC for each method. Results. All methods were highly reliable and valid. There were no significant differences in interobserver variability; there was a strong interobserver correlation. There were no significant differences in the percent differences between the estimated and real volumes of the objects using the 3 methods. The XI VOCAL method was superior to the multiplanar and VOCAL methods in the measurement of irregularly shaped objects. The XI VOCAL method with 10 planes estimated volumes closest to the real volumes. Conclusions. All 3 methods were reliable and valid; however, XI VOCAL was superior to the other methods in the measurement of irregularly shaped objects.

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Section: Discussionsupporting

confidence: 82%

“…22 Another study assessing fetal bladder volumes confirmed that VOCAL with 15° and 30°a ngles was reproducible and concordant. 23 The interval selected for the multiplanar method in this study was 5 mm. Pang et al 24 compared the accuracy of 3DUS in volumetric assessments using different numbers of planes.…”

Section: Discussionmentioning

confidence: 99%

Reliability and Validity of In Vitro Volume Calculations by 3-Dimensional Ultrasonography Using the Multiplanar, Virtual Organ Computer-Aided Analysis (VOCAL), and Extended Imaging VOCAL Methods

Barreto

Milani

Júnior

et al. 2010

Journal of Ultrasound in Medicine

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“…The 3D Vocal R technology has been evaluated as adequate to determine FUPR in single gestations that presented an intra-and inter-observer correlation with 15°-and 30°-rotation angles (Peixoto-Filho et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

“…The 30°-rotation angle used in our study was based on work published by the same group that evaluated singleton pregnancies (Peixoto-Filho et al, 2007). Considering that Yamamoto et al (2007) observed that the interval between V1 and V2 acquisitions must be less than those described for single gestations, we chose an interval from 1 to 5 min to avoid capturing the urination phase in one or both.…”

Section: D Vocalmentioning

confidence: 99%

3D Ultrasonography to Evaluate Fetal Urinary Production Rates in Twin Gestation: Construction of a Normal Value Curve

Mocarzel¹,

Sá

Velarde

et al. 2013

Twin Res Hum Genet

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Objective: The aim of this study was to assess fetal urinary production rates (FUPR) in twin gestations using 3D ultrasonography with VOCAL R (virtual organ computer-aided analysis) and to develop a curve of normal values for the target population. Methods: A cross-sectional study was performed in 30 normal twin pregnancies with gestational ages ranging from 20 to 34 weeks. FUPR was measured using a threedimensional ultrasound (3D US) virtual organ computer-aided analysis (VOCAL) system. FUPR (ml/hour) was calculated during the filling phase using the equation UPR = (VFB 2 -VFB 1 )/time. The values for UPR were plotted as a function of fetal biometry (biparietal diameter) to generate a nomogram. Results: A total of 41 normal twin fetuses with gestational ages between 20 and 34 weeks were investigated. Eleven were excluded because of inadequate bladder contour image quality and/or the observation of micturition in one or both fetuses. Linear regression analysis of FUPR as a function of biparietal diameter (BPD) shows the normal range for UPR by fetal biometry and is expressed by the following equation: Ln(UPR) = -5.0121 + 0.0548 BPD (R 2 0.3386, p value <.001). There was no statistically significant difference when the UPR was stratified by chorionicity. Conclusions: The use of biometric parameters to predict fetal FUPR seems to be useful. In twin pregnancies, BPD is the variable that is most closely related to FUPR. For each 1 mm increase in BPD, there is a 5% increase in FUPR. Chorionicity did not affect FUPR.

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“…It has been suggested recently that serial measurements of the fetal bladder volume by 3-dimensional sonography could be used to obtain the fetal urine production rate. [18][19][20][21][22][23][24][25][26] The objective of this study was to evaluate whether fetal urine production rate measurement is useful for predicting adverse outcomes in patients with uteroplacental insufficiency.…”

mentioning

confidence: 99%

Usefulness of Fetal Urine Production Measurement for Prediction of Perinatal Outcomes in Uteroplacental Insufficiency

Lee

Jun

Kim

et al. 2014

J of Ultrasound Medicine

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reeclampsia and fetal growth restriction are characterized by uteroplacental insufficiency, 1 which leads to fetal hypoxia and a subsequent reflex redistribution of the fetal cardiac output, resulting in increased blood flow to the brain and heart and decreased fetal renal blood flow. [2][3][4][5][6][7] However, uteroplacental insufficiency is not always associated with an adverse perinatal outcome. Because of the diverse disease spectrum of preeclampsia, clinicians encounter preeclamptic women with severe maternal conditions that necessitate immediate delivery,

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Three-dimensional ultrasound fetal urinary bladder volume measurement: reliability of rotational (VOCALTM) technique using different steps of rotation

Cited by 37 publications

References 19 publications

Reliability and Validity of In Vitro Volume Calculations by 3-Dimensional Ultrasonography Using the Multiplanar, Virtual Organ Computer-Aided Analysis (VOCAL), and Extended Imaging VOCAL Methods

Reliability and Validity of In Vitro Volume Calculations by 3-Dimensional Ultrasonography Using the Multiplanar, Virtual Organ Computer-Aided Analysis (VOCAL), and Extended Imaging VOCAL Methods

3D Ultrasonography to Evaluate Fetal Urinary Production Rates in Twin Gestation: Construction of a Normal Value Curve

Usefulness of Fetal Urine Production Measurement for Prediction of Perinatal Outcomes in Uteroplacental Insufficiency

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