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Effects of child seats on the cardiorespiratory function of newborns
Hiroaki Nagase1, Masahiko Yonetani, Yoshiyuki Uetani
1Department of Pediatrics, Kobe University School of Medicine, Chuo-ku, Kusonoki-cho, 7-chome, 5-1 Kobe, Japan. hiroaki@med.kobe-u.ac.jp
Insights
Chair-style infant car seats may cause more oxygen desaturation in newborns. Always check cardio-respiratory parameters before discharge to ensure infant safety.
Area of Science:
- Neonatal physiology
- Pediatric safety
- Cardio-respiratory monitoring
Background:
- Infant car seats are essential for safe travel.
- Different car seat designs may impact infant physiology.
- Understanding these effects is crucial for newborn health.
Purpose of the Study:
- To evaluate the impact of different infant car seat positions on cardio-respiratory parameters.
- To compare the effects of chair-shaped versus bed-shaped car seats.
- To assess respiratory compromise in healthy newborns.
Main Methods:
- 15 healthy newborns were monitored using a sleep apnea recorder.
- Cardio-respiratory parameters (heart rate, oxygen saturation) were measured.
- Infants were placed in chair-shaped, bed-shaped car seats, and on a nursery cot.
Main Results:
- Chair-shaped car seats showed significantly lower mean oxygen saturation (95.8%) compared to bed-shaped seats (98.8%).
- Newborns in chair-shaped seats experienced more episodes of mild and moderate oxygen desaturation.
- No desaturation episodes were observed when infants were placed on a nursery cot.
Conclusions:
- Chair-style infant car seats are associated with increased oxygen desaturation in newborns.
- Cardio-respiratory monitoring, particularly oxygen saturation, is recommended before infant discharge.
- Clinical assessment for potential respiratory compromise in chair-style car seats is advised.
Background:
This study aims to determine the effect of differently positioned infant car seats on cardio-respiratory parameters in healthy full-term newborns.
Methods:
We examined 15 healthy term newborns for respiratory compromise due to normal restraint in a recommended infant car seat. There are currently two types of car seats available in Japan: a chair-shaped car seat and a bed-shaped car seat. Using a sleep apnea recorder, we simultaneously monitored heart rate, percutaneous oxygen saturation, chest impedance and nasal airflow in infants placed in each of the car seats and also placed in the supine position on a nursery cot. Episodes of oxygen desaturation below 95% and longer than 10 s (mild desaturation) and below 90% longer and than 10 s (moderate desaturation) were evaluated over 30 min observation period.
Results:
The amount of time infants spent in a sleep state was significantly longer in the car seats than it was on the cot (P = 0.0015 for bed-shaped, P = 0.0012 for chair-shaped) and there was no difference in this measure between the two types of car safety seats. Mean of oxygen saturation with the chair-shaped car seat (95.8%) was significantly lower than that with the bed-shaped car seat (98.8%) (P = 0.0008). Newborn infants laid on the cot showed no episodes of desaturation. Newborn infants placed in the chair-shaped car seat had significantly more episodes of mild desaturation (mean, 7.33 times in nine of 15 infants), whereas in the bed-shaped seat observed only once each in two infants (P = 0.008). Moderate desaturation was observed in four of 15 infants in the chair-shaped car seat, whereas not observed in the bed-shaped car seat (P = 0.068).
Conclusion:
The results suggest that prior to discharge the degree of oxygen desaturation that occurs when an infant is placed in a chair-style car seat should be checked.