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[Doppler-sonography of cerebral blood-flow in infants]
Insights
Doppler-sonography of infant intracranial arteries provides valuable cerebral blood flow data. Pulsation index changes detected by this method aid in diagnosing brain edema and intracranial hemorrhage.
Area of Science:
- Neuroimaging
- Pediatric Neurology
- Vascular Ultrasound
Context:
- Cerebral blood flow assessment in infants is crucial for diagnosing neurological conditions.
- Non-invasive methods are preferred for evaluating intracranial hemodynamics in neonates.
- The anterior fontanelle provides an acoustic window for transcranial Doppler-sonography.
Purpose:
- To evaluate the utility of Doppler-sonography for assessing intracranial arterial blood flow in infants.
- To compare the efficacy of directional and pulsed Doppler techniques in identifying cerebral arteries.
- To investigate the diagnostic value of the pulsation index (P.I.) in relation to neurological conditions and gestational age.
Summary:
- Doppler-sonography through the anterior fontanelle successfully visualized intracranial arteries in infants.
- The pulsed Doppler technique identified at least one artery in 95% of cases.
- Significant differences in pulsation index were observed between Doppler methods and correlated with brain edema, intracranial hemorrhage, and gestational age.
Impact:
- This study highlights Doppler-sonography's clinical relevance for diagnosing and monitoring neurological conditions in infants.
- The pulsation index serves as a valuable biomarker for intracranial pathologies.
- Findings support the use of Doppler-sonography in neonatal intensive care units for improved patient management.
Abstract:
Doppler-sonography of the intracranial arteries in the sagittal section through the open anterior fontanelle may yield valuable information on the cerebral blood-flow in infants. Applying the directional method, the anterior-cerebral artery could be recorded in all probands; by using the pulsed technique at least one artery was identified in 95% of the cases. There was a significant difference in pulsation-index (P.I.) between the pulsed and the directional method. Both methods revealed a reduction of the P.I. in infants with brain edema, and an increase of the P.I. after intracranial haemorrhage had occurred. The P.I. was significantly increased in infants younger than 36 gestational weeks, compared with healthy term newborns older than 40 weeks. The clinical relevance for diagnostic purposes as well as for therapeutic monitoring is discussed.