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Effect of phototherapy on cardiorespiratory activity during sleep in neonates with physiologic jaundice
David Bader1, Amir Kugelman, Dan E Blum
1Department of Neonatology, Bnai Zion Medical Center, Haifa, Israel. alona500@netvision.net.il
Insights
Phototherapy for neonatal jaundice alters cardiorespiratory activity during active sleep in term infants. These changes, including decreased respiratory rate, are not clinically significant during quiet sleep or in real-world conditions.
Area of Science:
- Neonatal Medicine
- Pediatric Cardiology
- Sleep Medicine
Background:
- Phototherapy is the standard treatment for neonatal jaundice.
- Short-term cardiorespiratory effects of phototherapy require further investigation.
Purpose of the Study:
- To evaluate the cardiorespiratory impact of phototherapy during sleep in term infants with physiologic jaundice.
Main Methods:
- Two polysomnography studies were conducted on 10 healthy term infants during sleep.
- Infants served as their own controls, with studies performed before and during phototherapy.
- Cardiorespiratory parameters, including heart rate, respiratory rate, and apnea, were analyzed during active and quiet sleep.
Main Results:
- Phototherapy led to a significant decrease in respiratory rate and an increase in heart rate during active sleep (P < 0.05).
- No significant differences in cardiorespiratory parameters were observed during quiet sleep.
- Oxygen saturation, apnea rate, and periodic breathing remained unaffected; no clinically significant apnea or bradycardia occurred.
Conclusions:
- Phototherapy influences cardiorespiratory activity during active sleep in term infants with jaundice.
- These observed effects do not appear to have clinical significance in practical settings.
Background:
Phototherapy is considered the standard of care for neonatal jaundice. However, its short-term cardiorespiratory effects have not been studied thoroughly.
Objectives:
To assess the cardiorespiratory effect of phototherapy during sleep in term infants with physiologicjaundice.
Methods:
We performed two polysomnography studies during 3 hours sleep in 10 healthy term infants with physiologic jaundice; each infant served as his/her own control. The first study was performed just prior to phototherapy and the second study during phototherapy 24 hours later. Heart and respiratory rates, type and duration of apneas, and arterial oxygen saturation were analyzed during active and quiet sleep.
Results:
Term infants (gestational age 38.6 +/- 1.4 weeks, birth weight 3.2 +/- 0.5 kg) underwent the two polysomnography studies within a short time interval and had a comparable bilrubin level (3.6 +/- 0.8 and 4.5 +/- 0.8 days; 14.5 +/- 1.4 and 13.8 +/- 2.1 mg/dl, P = NS, respectively). There was no difference in sleeping time or the fraction of active and quiet sleep before or during phototherapy. During active sleep under phototherapy there was a significant decrease in respiratory rate and increase in heart rate (54.3 +/- 10.3 vs. 49.1 +/- 10.8 breaths/minute, and 125.9 +/- 11.7 vs. 129.7 +/- 15.3 beats/minute, respectively, P < 0.05), as well as a decrease in respiratory effort in response to apnea. These effects were not found during quiet sleep. Phototherapy had no significant effect on oxygen saturation, apnea rate or periodic breathing in either sleep state. No clinical significant apnea or bradycardia occurred.
Conclusions:
Phototherapy affected the cardiorespiratory activity during active sleep but not during quiet sleep in term infants with physiologic jaundice. These effects do not seem to have clinical significance in "real-life" conditions.
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