Doppler ultrasound of the pulmonary artery as fetal lung maturity indicator, Cuenca - Ecuador

Authors

  • Jonnathan Paúl Orellana Ortega Hospital Especializado Fundación Humanitaria Pablo Jaramillo Crespo. Unidad de Ecografía. Departamento de Ginecología-Obstetricia. Cuenca-Ecuador https://orcid.org/0000-0002-6422-9969
  • Zoila Katherine Salazar Torres Universidad Católica de Cuenca. Unidad de Salud y Bienestar. Departamento de Investigación. Cuenca-Ecuador https://orcid.org/0000-0002-7663-8049
  • Freddy Rosendo Cárdenas Heredia Universidad Católica de Cuenca. Unidad de Salud y Bienestar. Departamento de Investigación Formativa. Cuenca-Ecuador
  • Rómulo Vinicio Orellana Guerrero Hospital Especializado Fundación Humanitaria Pablo Jaramillo Crespo. Unidad de Ecografía. Departamento de Ginecología-Obstetricia. Cuenca-Ecuador https://orcid.org/0000-0002-9703-6645
  • Saúl Fabricio Méndez Cabrera Ministerio Salud Publica. Unidad de Salud y Bienestar. Departamento de Salud. Cuenca-Ecuador https://orcid.org/0000-0001-7706-2056
  • Gustavo Mauricio Sánchez Salazar Ministerio de Salud Pública. Subcentro de Salud Jaime Roldos Aguilera. Cuenca-Ecuador https://orcid.org/0000-0001-9381-3083

DOI:

https://doi.org/10.18537/RFCM.38.02.03

Keywords:

ultrasonography doppler, laser doppler flowmetry, gestational age

Abstract

Introduction: pulmonary artery flow metric in healthy fetuses can be a predictive study of lung maturity, which leads to an impact on the decrease in perinatal mortality.

Objective: to establish the ratio of pulmonary artery acceleration time to ejection time (AT/ET) as an indicator of fetal lung maturity in pregnant women from 26 to 40 weeks of gestation (WG), users of the “Hospital Especializado Fundación Humanitaria Pablo Jaramillo Crespo”, period 2017.

Methods: A validity study of diagnostic tests was carried out. Pulmonary artery flow metric was evaluated by Doppler ultrasound in 300 healthy fetuses of pregnant women between 15 to 45 years old. Surveys were used to collect data. Sensitivity (S), specificity (E), positive predictive value (PPV) and negative predictive value (NPV) were used to determine validity.

Results: the value of the TA / TE index of the pulmonary artery was 0.216 for pregnant women between 26-28 WG; of 0.253 between 29-31 WG; 0.279 between 32-34 WG; 0.315 for pregnant women between 35-37 WG and 0.349 between 38-40 WG. The 37 WG at the cut-off point was 0.320; the ROC area was 0.98 with a S: 95.2%, E: 97.2%. The PPV 93.0% and NPV 98.1%.

Conclusions: the AT/ET ratio of pulmonary artery showed correlation with gestational age. An AT/ET ratio of 0.320, as a cut-off point, predicts fetal lung maturity.

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Published

2020-09-01

Issue

Vol. 38 No. 2 (2020): Revista de la Facultad de Ciencias Médicas de la Universidad de Cuenca

Section

Original Article

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Copyright (c) 2020 ZOILA KATHERINE SALAZAR TORRES

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