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With this study we want to see how the blood flow in the anterior cerebral artery (ACA) and the basilar artery (BA) after the caudal block changes.
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| Measure | Description | Time Frame |
|---|---|---|
| depression of blood flow in ACA & basilar artery after caudal block | one hour |
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Inclusion Criteria:
Exclusion Criteria:
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infants and neonates undergoing a infraumbilical surgery in general anesthesia with caudal block
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