Accuracy in estimating fetal urinary bladder volume using a modified ultrasound technique

Fägerquist, Mats; Fägerquist, U. O.; Steyskal, H.; Odén, Anders; Blomberg, S

doi:10.1046/j.1469-0705.2002.00629.x

Cited by 16 publications

(4 citation statements)

References 14 publications

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“…This method has the advantages of simplicity and thus an expected good interobserver reproducibility in prenatal diagnostic centers, including those with fewer resources and limited staff. Other techniques to assess fetal blood redistribution, such as Doppler ultrasound [31,32] , have the advantage of enabling quantification of renal blood flow, but they are comparatively costly to perform, since they require more sophisticated equipment. The noninvasive nature of sonography was a crucial feature of the protocol for this study, which began with the hypothesis that FUPR is an early sign of fetal renal blood flow reduction in women with PPROM.…”

Section: Discussionmentioning

confidence: 99%

Fetal Urine Production Rate in Preterm Premature Rupture of Membranes Is Associated with Adverse Neonatal Outcome: A Pilot Study

Avitan¹,

Drukker²,

Pri‐Chen³

et al. 2017

Gynecol Obstet Invest

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Aim: In this study, we evaluate the associations between fetal urinary production rate (FUPR), measured by ultrasound, and adverse neonatal outcome in women with preterm premature rupture of membranes (PPROM). Methods: We conducted a prospective pilot cohort of singleton pregnancies complicated by PPROM occurring at gestational week 24 or later managed until spontaneous labor (after 48 h of admission), chorioamnionitis, or induction by protocol at 35 + 0 weeks. FUPR was evaluated by 2D sonography at admission (corrected for gestational age). The main neonatal outcome measures were chorioamnionitis, placental inflammatory grading, first neonatal creatinine value, first neonatal dextrose value, length of neonatal intensive care unit (NICU) stay, necrotizing enterocolitis (NEC), intraventricular hemorrhage (IVH) (grades I-IV), blood transfusions, reduced neonatal urine production rate (<4 mL/kg/h), and early neonatal sepsis. Samples of maternal (at admission) and umbilical cord blood were analyzed for interleukin-6 (IL-6) level. Results: The study included 38 women. Low FUPR was associated with clinical chorioamnionitis, longer NICU hospitalization (p = 0.01), higher rates of NEC or IVH (p = 0.008), and blood transfusion (p = 0.004). Conclusions: A finding of FUPR on in utero ultrasound examination in pregnancies complicated by PPROM may be indicative of adverse neonatal outcome.

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Section: Discussionmentioning

confidence: 99%

Fetal Urine Production Rate in Preterm Premature Rupture of Membranes Is Associated with Adverse Neonatal Outcome: A Pilot Study

Avitan¹,

Drukker²,

Pri‐Chen³

et al. 2017

Gynecol Obstet Invest

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show abstract

“…This relationship has been thoroughly documented in three previous studies [2, 3, 4]. When all the cases in these studies are included, the distribution of the SD and residuals supports a linear relationship, which is a prerequisite for using a linear regression function [13] (Figs.…”

Section: Discussionmentioning

confidence: 62%

Derivations that enable the testing of fetal urine production as a method of fetal surveillance

Fägerquist

Fägerquist²,

Odén³

et al. 2009

Arch Gynecol Obstet

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PurposeTo calculate the measurement error of the hourly fetal urine production rate (HFUPR) and evaluate the implication of different methods for measuring the HFUPR, i.e. ellipsoid versus sum-of-cylinders method.MethodsThe calculation was based on sonographic documentation of the increased bladder volumes during the filling phase, the bladder volume measurement error and the number and time points of bladder image capture.ResultsThe probability of a false pathological reading was excluded (0%) with the sum-of-cylinders method for gestational ages of ≥30 weeks. With the ellipsoid method, the risk was higher. The maximum changes which could be exclusively explained by measurement error were four to five times greater with the ellipsoid method compared with the sum-of-cylinders method.ConclusionsThe present paper illustrates a careful evaluation of the HFUPR measurement error and the implications of using different ultrasound methods for bladder volume estimations.Electronic supplementary materialThe online version of this article (doi:10.1007/s00404-009-1242-6) contains supplementary material, which is available to authorized users.

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“…Standard deviation (SD) was used because the variation was normally distributed. Furthermore, there was a linear relationship between bladder volume and the measurement error, which has been thoroughly documented in three previous studies (Fagerquist et al, 2001;Fagerquist et al, 2003;Fagerquist et al, 2002). This is a prerequisite for using a linear regression function (Skrepnek, 2005).…”

Section: Methods For Estimating the Volume Of The Fetal Urinary Bladdermentioning

confidence: 99%

“…The reliability of the estimated bladder dimensions, on the other hand, has been evaluated using the 2D ultrasound technique (Fagerquist et al, 2001;Fagerquist et al, 2003;Fagerquist et al, 2002). The calculation of the measurement error was based on the variability in repeated estimations of identical bladder volumes.…”

Section: Methods For Estimating the Volume Of The Fetal Urinary Bladdermentioning

confidence: 99%

Renal Function and Urine Production in the Compromised Fetus

Fägerquist¹

2012

From Preconception to Postpartum

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Accuracy in estimating fetal urinary bladder volume using a modified ultrasound technique

Abstract: Using a modified ultrasound technique, the variability in fetal bladder volume estimation can be reduced.

Cited by 16 publications

References 14 publications

Fetal Urine Production Rate in Preterm Premature Rupture of Membranes Is Associated with Adverse Neonatal Outcome: A Pilot Study

Fetal Urine Production Rate in Preterm Premature Rupture of Membranes Is Associated with Adverse Neonatal Outcome: A Pilot Study

Derivations that enable the testing of fetal urine production as a method of fetal surveillance

Renal Function and Urine Production in the Compromised Fetus

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