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Physical condition of preterm infants with periventricular leukomalacia
A Okumura1, F Hayakawa, T Kato
1Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan. okumura@med.nagoya-u.ac.jp
Insights
Preterm infants with severe brain lesions (PVL) showed similar overall health to those requiring mechanical ventilation, despite respiratory distress. Infants with spontaneous respiration had better physiological scores.
Area of Science:
- Neonatology
- Pediatric Neurology
- Critical Care Medicine
Background:
- Preterm infants with severe brain lesions, specifically periventricular leukomalacia (PVL), present unique physiological challenges.
- Assessing the general condition of these infants is crucial for appropriate clinical management and prognostication.
- Comparison with preterm infants requiring mechanical ventilation (MV) or those with spontaneous respiration (SR) provides valuable context.
Purpose of the Study:
- To evaluate and compare the general physiological condition of preterm infants with severe brain lesions (PVL) against normal preterm infants.
- To differentiate the physiological status based on respiratory support needs: spontaneous respiration (SR) versus mechanical ventilation (MV).
- To investigate the components of the Score for Neonatal Acute Physiology (SNAP) and a derived 'lung score' in these distinct groups.
Main Methods:
- The study included three groups of preterm infants: PVL group (n=9), SR group (n=18), and MV group (n=18).
- The Score for Neonatal Acute Physiology (SNAP) and a 'lung score' (based on PaO2, PaO2/FiO2 ratio, PaCO2, and oxygenation index) were calculated.
- Additional neonatal variables were assessed alongside SNAP.
Main Results:
- The SNAP score was significantly lower in the SR group compared to both the PVL (P<0.05) and MV (P<0.01) groups.
- The 'lung score' also showed significantly lower values in the SR group than in the PVL (P<0.05) and MV (P<0.01) groups.
- No significant differences were found in the residual score (SNAP minus lung score) among the three groups, suggesting comparable non-respiratory physiological status.
Conclusions:
- Preterm infants with periventricular leukomalacia (PVL) do not necessarily exhibit a poorer general physical condition compared to those requiring mechanical ventilation.
- While respiratory distress is common in PVL infants, their overall physiological status may be comparable to infants needing MV.
- Infants with spontaneous respiration demonstrate better physiological parameters, as indicated by lower SNAP and lung scores.
Abstract:
The aim of this study is to determine the general condition of preterm infants with severe brain lesions and to compare it with that of normal preterm infants. The Score for Neonatal Acute Physiology (SNAP) was calculated in nine preterm infants with periventricular leukomalacia (PVL) whose initial electroencephalograms showed grade IV depression (PVL group), 18 preterm infants who did not require mechanical ventilation during the neonatal period, Spontaneous respiration (SR group), and 18 preterm infants who required mechanical ventilation (MV group). The sum of the following four items in SNAP was separately calculated and called the 'lung score': PaO(2), PaO(2)/FiO(2) ratio, PaCO(2), and oxygenation index. In addition to SNAP, we evaluated some neonatal variables. SNAP is lower in the SR group than in the PVL (P<0.05) or MV (P<0.01) groups. The lung score was also lower in the SR group than in the PVL (P<0.05) or MV (P<0.01) groups. On the other hand, the residual score (SNAP minus lung score) was not significantly different among the three groups. The physical condition of infants with PVL was not poor, although respiratory distress was often observed.