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Article in Spanish | LILACS-Express | LILACS | ID: biblio-1508923

ABSTRACT

Introduction. Fetal obstructive uropathy can be treated early in pregnancy by intrauterine vesicoamniotic shunting, immediately after diagnosis by ultrasound, in specific cases with a favorable prognosis in renal function using fetal urine beta2 microglobulin. Objective: To determine the changes of beta-2 microglobulin in consecutive samples of fetal urine in 48 - 72 hour-intervals in fetuses with obstructive uropathy at 16 weeks of gestation. Methods: We designed a descriptive and longitudinal study, including 15 pregnant women whose fetuses were diagnosed with obstructive uropathy without chromosomal abnormalities, performing vesicocentesis for urinary biometry. Results: Beta-2 microglobulin values were higher than 4 mg/dL in the first vesicocentesis of all 15 cases and decreased to less than 4 mg/dL in 7 cases (46.6%) after the second vesicocentesis. In all cases when beta-2 microglobulin was less than 8 mg/dL in the first vesicocentesis, there was a decrease to nearly 4 mg/dL (maximum 4.3 mg/dL) in the second vesicocentesis. Conclusions: Vesicoamniotic shunting should be performed in all cases of fetal obstructive uropathy when the values of beta-2 microglobulin are less than 8 mg/dL in the first vesicocentesis.


Antecedentes y objetivos. La uropatía obstructiva fetal puede ser tratada precozmente mediante la colocación de derivación vesicoamniótica intrauterina. Los criterios de tratamiento incluyen la ausencia de malformaciones mayores asociadas, cariotipo normal y función renal conservada demostrada por microglobulina beta-2 4 mg/dL en los 15 casos con la primera vesicocentesis, y disminuyeron a < 4 mg/dL en 7 casos (46,6%) en la segunda vesicocentesis. En todos los casos cuando la microglobulina beta-2 fue < 8 mg/dL en la primera vesicopunción, siempre disminuyó a valores muy próximos a 4 mg/dL (máximo de 4,3 mg/dL) en la segunda vesicopunción. Conclusiones. Se plantea la colocación in útero de derivaciones vesicoamnióticas en los casos de uropatía obstructiva fetal cuando la microglobulina beta-2 sea < 8 mg/dL en la primera vesicopunción, omitiendo realizar una segunda vesicopunción.

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