T-formula for Assessment Severity of Patent Ductus Arteriosus in Newborn Group

Authors

  • อุเทน บุญมี
  • ปริมพัชร์ ไวทยวงศ์สกุล

DOI:

https://doi.org/10.14456/jmu.2019.3

Keywords:

Patent Ductus Arteriosus, PDA, Echocardiography, Newborn

Abstract

          An echocardiogram is a standard diagnostic tool for children with patent ductus arteriosus (PDA). In current practice, a hemodynamic significant PDA is defined as a PDA with left atrium-to-aortic valve diameter ratio (LA/Ao ratio) greater than 1.4. In some cases, we found the severity of disease, PDA size and left atrial size were not correlated. By observation, we would like to propose a simple formula called T-formula [T-formula = (PDA sizemm + LA/Ao ratio)/LVOTmm]. The clinical and echocardiographic data of 32 neonates since 2016-2017 were reviewed. The mean age was 2.7 ± 1.9 days. This descriptive study used Spearman’s correlation, and showed sensitivity and specificity of cut point. In the result, The correlation coefficient showed extremely strong correlation (rs=0.97). With the cut point of T-formula ≥ 0.75, the sensitivity and specificity was 100% for significantly severe PDA (Normal 0.2 - 0.3). This T-formula is a simplified formula which included more parameter than the conventional method. With higher sensitivity and specificity, we proposed that this formula could be benefit in clinical practice.

References

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Published

2019-06-28

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Section

Research Articles