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Predictive value of fetal serum beta 2-microglobulin for neonatal renal function
S M Berry1, B Lecolier, R S Smith
1Division of Maternal Fetal Medicine, Wayne State University, Detroit, Michigan, USA.
Lancet (London, England)
|May 20, 1995
Summary
Predicting postnatal renal function in fetuses with urinary-tract malformations (UTM) is crucial. Fetal serum beta 2-microglobulin shows high accuracy in estimating fetal kidney function, aiding in management decisions.
Area of Science:
- Perinatal medicine
- Pediatric nephrology
- Fetal medicine
Background:
- Management of fetal urinary-tract malformations (UTM) relies on predicting postnatal renal function.
- Current prediction methods include fetal urinary biochemistry and sonography.
- Serum beta 2-microglobulin is a reliable postnatal marker for renal function and does not cross the placenta.
Purpose of the Study:
- To investigate the relationship between fetal serum beta 2-microglobulin levels and postnatal renal function.
- To evaluate the utility of fetal serum beta 2-microglobulin as a predictor of renal function in fetuses with UTM.
Main Methods:
- A cohort study comparing 64 unaffected fetuses with 15 fetuses diagnosed with UTM.
- Measurement of fetal serum beta 2-microglobulin levels.
- Analysis of diagnostic performance using a 5.6 mg/L cut-off.
Main Results:
- A beta 2-microglobulin cut-off of 5.6 mg/L demonstrated high diagnostic accuracy.
- Cross-validated sensitivity was 80.0%, specificity 98.6%.
- Positive predictive value was 88.9%, and negative predictive value was 97.1%.
Conclusions:
- Fetal serum beta 2-microglobulin is a promising biomarker for assessing fetal renal function.
- This marker can aid in predicting postnatal renal outcomes for fetuses with UTM.
- It offers a non-invasive method to improve management strategies for congenital urinary tract anomalies.