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Journal of the Korean Society of Neonatology 2006;13(1):24-31.
Published online May 1, 2006.
The Normal Values of Pulmonary Function Test (PFT) in Neonates according to Postconceptional Age (PCA) and Changes of PFT in Neonatal Respiratory Diseases.
Myoung Jae Chey
Department of Pediatrics, College of Medicine, Inje University, Seoul, Korea. neonate@sanggyepaik.ac.kr
수태후 연령에 따른 신생아 폐기능 검사의 정상치 및 신생아 호흡기 질환에서의 폐기능 변화
Abstract
PURPOSE
Aim of this study is to obtain the normal values of pulmonary function test (PFT) in newborn babies according to their postconceptional age and to detect changes in PFT values of neonatal lung diseases including respiratory distress syndrome and meconium aspiration pneumonia.
METHODS
PFT was performed in 60 newborn babies who were admitted in the neonatal intensive care unit and newborn nurseries of Inje University Sanggye Paik Hospital from 2002. 11. 1. to 2003. 10. 31. The PFT data of 20 respiratory distress syndrome (RDS) and 20 meconium aspiration pneumonia patients during the same period were analyzed and compared with normal values of similar postconceptional age group to find what kind of changes in PFT values occur in patient groups. PFT values including compliance (C), resistance (R), functional residual capacity (FRC), tidal volume (TV), percent volume to peak flow (%V-PF) were measured.
RESULTS
1) In PCA 30-32 week newborns, C:1.22+/-0.43 (mL/cmH2O), R:0.12+/-0.07 (cmH2O/mL/sec), FRC:20.9+/-12.7 (mL/kg), TV:7.1+/-3.6 (mL/kg), In PCA 33-36 week newborns, C:1.81+/-0.76 (mL/cmH2O), R:0.09+/-0.04 (cmH2O/mL/sec), FRC:23.3+/-14.1 (mL/ kg), TV:7.3+/-4.3 (mL/kg). In PCA 37-42 week newborns, C:2.08+/-0.57 (mL/cmH2O), R:0.08+/-0.06 (cmH2O/mL/sec), 28.3+/-13.4 (mL/kg), TV:8.5+/-4.1 (mL/kg). 2) In RDS patients of PCA 30-36 week, C:0.08+/-0.02 (mL/cmH2O), FRC:12.3+/-4.3 (mL/kg), %V-PF:0.27+/-0.11. These values were significantly decreased comparing with normal PFT values of newborns with similar postconceptional age (P<0.05).
CONCLUSIONS
Lung compliance and FRC of normal newborns increased with increase of their postconceptional age. In RDS patients compliance, FRC and %V-PF were significantly decreased comparing with normal newborns with similar postconceptional age.
Key Words: Neonatal pulmonary function test; Normal values; Respiratory distress syndrome; Meconium aspiration pneumonia
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