Related Experiment Videos
Development of peripheral chemoreceptor function in infants with chronic lung disease and initially lacking hyperoxic
M Katz-Salamon1, M Eriksson, B Jónsson
1Department of Women's and Child Health, Karolinska Hospital, Stockholm, Sweden.
Insights
Preterm infants with chronic lung disease (CLD) show delayed development of peripheral chemoreceptor function, impacting their protection against hypoxia. This delayed chemosensitivity may increase their risk for sudden infant death syndrome (SIDS).
Area of Science:
- Neonatology
- Respiratory Physiology
- Pediatric Pulmonology
Background:
- Chronic lung disease (CLD) in preterm infants is associated with impaired respiratory control.
- Undeveloped peripheral chemoreceptor function is a potential risk factor for sudden infant death syndrome (SIDS).
Purpose of the Study:
- To investigate the development of peripheral chemoreceptor function in preterm infants with CLD.
- To determine the age at which ventilatory response to hyperoxia emerges in these infants.
- To assess the relationship between CLD severity and the development of chemosensitivity.
Main Methods:
- Longitudinal follow-up of ten preterm infants with CLD.
- Overnight monitoring of oxygen saturation.
- Assessment of lung compliance and airway resistance.
- Hyperoxic tests to evaluate ventilatory response to hyperoxia.
Main Results:
- The hyperoxic response, indicating developed peripheral chemoreceptor function, appeared at a mean postnatal age of 14 weeks (range 9-33 weeks).
- This response was independent of lung mechanics.
- Infants with severe CLD exhibited a significantly later appearance of the hyperoxic response.
Conclusions:
- Preterm infants with CLD experience a delayed development of peripheral chemosensitivity.
- This delayed chemosensitivity may leave infants vulnerable to hypoxia during the peak SIDS risk period.
- Further research is warranted to explore interventions for enhancing chemosensitivity in this population.
Abstract:
Ten preterm infants with chronic lung disease (CLD) and undeveloped peripheral chemoreceptor function, described as ventilatory response to hyperoxia, were investigated, according to an individual protocol. Each infant was followed up until the response to hyperoxic inhalation had been observed on two occasions. Each examination consisted of overnight recording of saturation, testing of lung compliance and airway resistance, and the hyperoxic test. The hyperoxic response appeared at a mean postnatal age of 14 weeks (range 9-33 weeks). This response, which was independent of the infant's lung mechanics, appeared much later in infants with the severe form of CLD. As undeveloped peripheral chemoreceptor function has been suggested to be a key factor in sudden infant death syndrome (SIDS), the delayed development of their chemosensitivity leaves some infants with CLD unprotected against hypoxia at the age at which the risk for SIDS is highest.