Amniotic fluid turbidity: a useful adjunct for assessing fetal pulmonary maturity status

Strong, Thomas H.; Hayes, Allison; Sawyer, Allan T.; Folkestad, B.; Mills, Stephen D.; Sugden, P. J.

doi:10.1016/0020-7292(92)90043-i

Cited by 9 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Cetrulo et al [20] correlated amniotic fluid brightness measured at 650 nm optical density with pulmonary surfactants in the amniotic fluid. Moreover, a report correlated newspaper-unreadable turbid amniotic fluid with L/S ratio and phosphatidylglycerol to assess lung maturation [21], and findings, such as snowstorms and blizzards, in amniotic fluid can assess fetal lung maturation [22]. However, the ultrasonographic findings in the amniotic fluid reported thus far are not quantified indicators, as shown in this study.…”

Section: Discussionmentioning

confidence: 68%

Noninvasive Fetal Lung Maturity Prediction Based on Amniotic Fluid Turbidity Using Ultrasonic Histogram Measurement Function

Matsumoto¹,

Yamawaki²,

Haino³

et al. 2023

OJOG

View full text Add to dashboard Cite

Background: Amniotic fluid turbidity increases with fetal lung maturation due to vernix and lung surfactant micelles suspended in the amniotic fluid. This study focused on this phenomenon and evaluated the presence or absence of respiratory distress syndrome (RDS)/transient tachypnea of the newborn (TTN) by quantitatively assessing the brightness of the amniotic fluid turbidity using a noninvasive ultrasound histogram measurement function. Methods: We included cases of singleton pregnancies managed at the Niigata University Medical and Dental Hospital between November 2020 and March 2022. Histograms of amniotic fluid turbidity were measured at the center of the amniotic fluid depth, avoiding the fetus, placenta, and umbilical cord, with the gain setting set to 0, and the average value was obtained after three measurements. Histograms of fetal urine in the bladder were measured similarly. The value obtained by subtracting the fetal bladder brightness value from the amniotic brightness value based on histogram measurements was used as the final amniotic fluid brightness value. Results: We included 118 cases (16 of RDS/TTN and 102 of control). The gestational age of delivery weeks was correlated with amniotic fluid brightness (Spearman's rank correlation coefficient was 0.344; p = 0.00014). Amniotic fluid brightness values were significantly lower in the RDS/TTN group than in the control group (RDS/TTN: 16.2 ± 13.5, control: 26.3 ± 16.3; p = 0.020). The optimal cutoff value of amniotic fluid brightness to predict RDS/TTN was 20.3. For predicting RDS/TTN, the sensitivity, specificity, positive predictive value, and negative predictive value were 91.7%, 69.6%, 26.2%, and 94.1%, respectively. Conclusions: The quantitative value of the amniotic fluid brightness by histogram measurements may provide an easy and objective index for evaluating the presence or absence of RDS/TTN.

show abstract

Section: Discussionmentioning

confidence: 68%

Noninvasive Fetal Lung Maturity Prediction Based on Amniotic Fluid Turbidity Using Ultrasonic Histogram Measurement Function

Matsumoto¹,

Yamawaki²,

Haino³

et al. 2023

OJOG

View full text Add to dashboard Cite

show abstract

“…It has been reported that increased turbidity of the amniotic fluid with the progression of pregnancy could be used in determination of fetal lung maturation and this is correlated with the results of L / S (18)(19)(20) .…”

Section: Discussionmentioning

confidence: 74%

“…Hastwell (19) L / S ratio was greater than 2. Strong et al (20) showed that 29 out of 30 (97%) patients with fuzzy amniotic fluid L / S ratio was mature and it was immature in only 1 patient, on the contrary they showed that 50 out of 70 (71%) patients with a clear amniotic fluid L / S ratio was smaller than 2, and in 20 of them it was greater. In another study with this test Sbarra et al (21) .…”

Section: Discussionmentioning

confidence: 97%