Zeitschrift fur Geburtshilfe und Neonatologie · 2026
For a better understanding of thermoregulation in premature infants≤28 weeks of gestation: infrared thermography (IRT) and photoplethysmography imaging (PPGI) in a hybrid camera model as non-contact measuring methods.
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Brasche Milian, Lüken Markus, Leonhardt Steffen, Orlikowsky Thorsten, Heimann Konrad
Аннотация
BACKGROUND: Infrared thermography (IRT) reveals significant temperature differences between central and peripheral body regions in preterm infants, despite stable core temperature. This suggests active thermoregulation. Photoplethysmography imaging (PPGI) enables contactless, spatially resolved perfusion measurement.
METHODS: Ten preterm infants [GA at birth: 26 weeks (24-28); postnatal age: 35 days (12-62); weight: 960 g (670-1290)] were examined in prone (PR) and supine (SU) positions in the incubator. PPGI (amplitude) and IRT were recorded from arm, head, and thorax every 10 s for 5 min per position, with a 10 min washout. Heart rate (ECG) was monitored. Lin's concordance correlation coefficient was calculated.
RESULTS: Central regions were ~1°C warmer than peripheral regions (p<0.05), independent of position. PPGI amplitude remained constant (< 1.0; p>0.05) in all regions, with no correlation between IRT and PPGI (p>0.05).
CONCLUSION: In preterm infants, local perfusion remains stable despite regional temperature differences, suggesting that skin temperature is influenced more by passive heat diffusion than by perfusion changes.
METHODS: Ten preterm infants [GA at birth: 26 weeks (24-28); postnatal age: 35 days (12-62); weight: 960 g (670-1290)] were examined in prone (PR) and supine (SU) positions in the incubator. PPGI (amplitude) and IRT were recorded from arm, head, and thorax every 10 s for 5 min per position, with a 10 min washout. Heart rate (ECG) was monitored. Lin's concordance correlation coefficient was calculated.
RESULTS: Central regions were ~1°C warmer than peripheral regions (p<0.05), independent of position. PPGI amplitude remained constant (< 1.0; p>0.05) in all regions, with no correlation between IRT and PPGI (p>0.05).
CONCLUSION: In preterm infants, local perfusion remains stable despite regional temperature differences, suggesting that skin temperature is influenced more by passive heat diffusion than by perfusion changes.