Sickle cell disease and transcranial Doppler imaging: inter-hemispheric differences in blood flow Doppler parameters.
Stroke
; 42(1): 81-6, 2011 Jan.
Article
em En
| MEDLINE
| ID: mdl-21088242
ABSTRACT
BACKGROUND AND PURPOSE:
to establish reference values of interhemispheric differences and ratios of blood flow Doppler parameters in the terminal internal carotid artery, middle cerebral artery, and anterior cerebral artery in children with sickle cell anemia.METHODS:
fifty-seven out of 74 recruited children (mean age, 7.8 ± 3.4 years; range limits, 3-14 years), who were free of neurological deficits and intracranial narrowing detectable by MRA and had flow velocities <170 cm/s by conventional transcranial Doppler ultrasound, underwent transcranial color-coded duplex ultrasonography. Reference limits of flow parameters corrected and uncorrected for the angle of insonation were estimated using tolerance intervals, with P=0.90 for all possible data values from 95% of a population.RESULTS:
reference limits for left-to-right differences in cm/s in the mean angle-corrected and uncorrected flow velocities were -56 to 53 and -72 to 75 for middle cerebral artery, -49 to 57 and -81 to 91 for anterior cerebral artery, and -55 to 64 and -73 to 78 for terminal internal carotid artery, respectively. Respective reference limits for left-to-right velocity ratios were 0.31 to 1.84 and 0.38 to 1.75 for middle cerebral artery, 0.48 to 2.99 and 0.46 to 2.89 for anterior cerebral artery, and 0.61 to 2.56 and 0.56 to 2.23 for terminal internal carotid artery.CONCLUSIONS:
the study provides reference limits of interhemispheric differences and ratios of blood flow Doppler parameters that may be helpful in identification of intracranial arterial narrowing in children with sickle cell disease undergoing ultrasound screening for stroke prevention.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Artéria Carótida Interna
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Ultrassonografia Doppler Transcraniana
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Artéria Cerebral Anterior
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Artéria Cerebral Média
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Anemia Falciforme
Tipo de estudo:
Etiology_studies
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Observational_studies
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Prevalence_studies
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Risk_factors_studies
Limite:
Child
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Child, preschool
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Female
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Humans
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Male
Idioma:
En
Revista:
Stroke
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
Estados Unidos