[A screening program for detecting children with an increased SIDS risk (sudden and unexpected infant death)]
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This study investigated cardiorespiratory control in infants at risk for sudden infant death syndrome (SIDS). A delayed maturation of respiratory control, indicated by prolonged apnea and low substance P levels, was observed in high-risk infants.
Area of Science:
- Neuroscience
- Pediatrics
- Biochemistry
Context:
- Sudden infant death syndrome (SIDS) is a leading cause of post-neonatal mortality.
- A brainstem abnormality affecting cardiorespiratory neuroregulation is a leading hypothesis for SIDS.
- Understanding infant cardiorespiratory control is crucial for SIDS prevention strategies.
Purpose:
- To characterize cardiorespiratory control mechanisms in infants at risk for SIDS.
- To examine the role of the neurotransmitter substance P and polysomnography in assessing respiratory control maturation.
- To identify potential screening methods for identifying infants with immature respiratory control.
Summary:
- A prospective study examined 208 neonates (from 2500) using polysomnography and plasma substance P levels.
- Infants were selected based on an epidemiological risk score for SIDS.
- Significant age-dependent correlations between apnea duration and substance P levels were found in the SIDS-risk group, suggesting delayed maturation.
Impact:
- Polysomnography and substance P measurement may serve as a screening tool for respiratory control maturity in infants.
- Early identification of immature respiratory control could lead to timely interventions for SIDS prevention.
- Findings contribute to understanding the neurobiological underpinnings of SIDS.
Abstract:
The prospective study presented conducted to prevent SIDS (sudden infant death syndrome). One of the proposed hypotheses on SIDS postulates a brainstem abnormality in the neuroregulation of cardiorespiratory processes. Therefore we characterized cardiorespiratory control mechanisms by examining the neurotransmitter substance P in plasma and polysomnographic investigations. With respect to the probable multifactorial origin of SIDS we selected children firstly anamnestically by means of an epidemiologically evaluated pre-, peri- and postnatal risk score. We reported the results of 208 polysomnographically and biochemically examined children anamnestically selected from a group of 2500 neonates. Examinations were performed on infants aged 2-4 weeks up to 1 year. To characterize respiratory control, length and frequency of apnoeas were separately estimated by means of polysomnography in the sleep states active and quiet sleep. If there were polygraphic risk factors representing a disturbance of respiratory control, the children were prophylactically treated with aminophylline 3 x 3 mg/kg b.w. for 4 weeks. We found a significant age dependence both of the mean apnoea duration in active sleep and the substance P level in plasma in the SIDS-risk group but not in the controls. High mean apnoea duration was correlated with low substance P level in the first months of age in SIDS risk infants selected anamnestically. This may reflect a delayed maturation of respiratory control mechanisms. In this way the polysomnography and the investigation of the neuropeptide substance P may be useful for a screening method indicating wether the respiratory control mechanisms are mature or not.