The fetal lung maturation can be assessed by observation of stable microbubble (less than 15㎛ in diameter). As a prediction of idiopathic respiratory distress syndrome(RDS) in preterm delivary, the stable microbubble rating test was performed
between
25 weeks and 37 weeks of 46 patients, and compared to the term deliveries of 44 patients. A strong stable microbubble rating (more than 20 micro-bubbles within 1 ㎟) indicate that the RDS of new-born will not occur. The absence of stable
microbubble
suggest high-risk of RDS.
@ES The result were as follows:
@EN 1. The incidence rate of RDS was 34.8% in preterm deliveries, and 2.3% in term deliveries.
2. The incidence rate of RDS in preterm deliveries was 5.9% in strong SMR, 20% in medium, 80% in weak, 100% in very weak and zero. And there was lower incidence rate in strong and medium, and higher incidence rate in weak, very weak, and zero.
3. There was no sexual difference in incidence of RDS.
4. SMR showed that the positive predictability was 75%, the negative predictability was 90.3%, and the sensitivity rate was 85.7%, the specificity was 87.5%, and so it was thought to be a surer method than other test.
5. SMR test is shorter-time comsuming, cheaper, and simpler method.
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