Medida da velocidade de fluxo nas artérias cerebrais utilizando ultra-som Doppler transfontanela antes e após o tratamento cirúrgico da hidrocefalia

Assis, Marcelo Cardoso de; Machado, Hélio Rubens

doi:10.1590/s0004-282x1999000500015

Cited by 9 publications

(7 citation statements)

References 15 publications

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“…The Arnold Chiari malformation is characterized by herniation of the tonsils, cerebellar worm, fourth ventricle and lower portion of the bulb through the occipital foramen, and is reported as the main determinant of hydrocephalus (Araújo et al, 2004). Hydrocephalus is an abnormal buildup of cerebrospinal fluid in the ventricles or subarachnoid space (Assis and Machado, 1999). In the present study, the ventricular dilation observed is indicative of this excess fluid, which is aligned with the skeletal malformation observation.…”

Section: Males Femalessupporting

confidence: 81%

Investigation of possible teratogenic effects in the offspring of mice exposed to methylphenidate during pregnancy

Costa

Galvão

Bacchi

et al. 2016

Reproductive BioMedicine Online

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Section: Males Femalessupporting

confidence: 81%

Investigation of possible teratogenic effects in the offspring of mice exposed to methylphenidate during pregnancy

Costa

Galvão

Bacchi

et al. 2016

Reproductive BioMedicine Online

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“…It was found out that ACA and MCA have the highest predisposition to early reaction to change of intracranial dynamics [382,383]. During observation of RI-ACA, RI-MCA, and RI-ICA in children with hydrocephalus before drainage procedure as well as in the early and later postsurgical periods, the biggest changes of blood flow Doppler parameters were found in the anterior cerebral artery [384]. In children with hydrocephalus, Nishimaki et al [385] measured RI-ACA and RI-BA.…”

Section: The Presence Of Bilateral Asymmetric Ventriculomegaly Characmentioning

confidence: 99%

The Role of Transcranial Doppler Sonography in the Management of Pediatric Hydrocephalus

Kolarovszki¹

2019

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IV 5. Etiology of hydrocephalus 5.1 Congenital hydrocephalus 5.2 Acquired postnatal hydrocephalus 6. Pathophysiology of hydrocephalus 6.1 Pathophysiological mechanisms of onset and development of hydrocephalus 6.2 Pathologic changes in hydrocephalus 6.3 Vascular changes in hydrocephalus 6.4 Biochemical changes in hydrocephalus 6.5 Changes of cerebral metabolism in hydrocephalus 7. Clinical manifestations of pediatric hydrocephalus 8. Basic properties of ultrasound 9. Biological effects of ultrasound 9.1 Thermal effects 9.2 Cavitation 9.3 Other mechanic effects 10. Doppler sonography 10.1 The role of Doppler principle in ultrasonography 10.2 The Doppler systems with continuous wave (CW) 10.3 The pulsatility Doppler systems (the pulsed waves, PW) 10.4 The color flow Doppler tomography (CFD, real-time two-dimensional Doppler) 10.5 The technique of the color Doppler power mapping (color Doppler energy, CDE; color power angio, CPA; Doppler power mode; power mapping) 11. The transcranial color-coded Doppler ultrasonography 11.1 The transcranial color-coded Doppler ultrasonographic examination 12. The Doppler curve, measured and calculated parameters 12.1 The Doppler curve 12.2 Measured and assessed parameters of the Doppler curve 12.3 Development of Doppler parameters of cerebral circulation: physiological values 12.3.1 Neonates 12.3.2 Infancy V 12.4 The factors influencing the value of qualitative indices of the Doppler curve 12.4.1 The factors increasing the resistance index of cerebral arteries 12.4.2 Factors decreasing the resistance index of cerebral arteries 13. Morphology of the cerebral ventricles in pediatric hydrocephalus 14. Assessment of Doppler parameters of the cerebral arteries in children with hydrocephalus 15. Case reports 15.1 Assessment of intracranial dynamics in the preterm neonate with hydrocephalus before and after insertion of external ventricular drainage 15.2 Observation of intraindividual dynamics in the preterm neonate with asphyxia and development of progressive hydrocephalus regarding indication of drainage procedure 15.3 Impact of tachycardia on Doppler parameters of blood flow in ACA in the infant with active hydrocephalus 15.4 Assessment of intracranial dynamics of the infant with schizencephaly 15.5 Assessment of intracranial dynamics in the term neonate with congenital hydrocephalus, Arnold-Chiari malformation type II and lumbosacral myelomeningocele 15.6 Assessment of intracranial dynamics in the preterm neonate with posthemorrhagic hydrocephalus 15.7 Assessment of intracranial dynamics in the neonate with occipital encephalocele and congenital hydrocephalus 15.8 Assessment of intracranial dynamics in the term neonate with birth trauma, intracerebral hemorrhage and hemocephalus 15.9 Assessment of intracranial dynamics in the neonate with congenital hydrocephalus and VP shunt revision 15.10 Assessment of intracranial dynamics of congenital hydrocephalus in prenatal and postnatal period

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“…A falta de poder do IR de Pourcelot em quantificar mudanças significativas da velocidade de FSC ou da resistência vascular periférica descrito em outros estudos 23,24 , pode justificar os resultados deste trabalho, onde as alterações de resistência vascular cerebral provavelmente tenham afetado de forma equivalente às velocidades sistólica e diastólica, produzindo valores maiores de VFPS e VFFD em RN AIG, porém sem diferença significativa no IR, em relação ao PIG. Por outro lado, um grande número de outros fatores e eventos pode afetar a circulação sanguínea intracraniana no período perinatal, além da condição nutricional, que é o objeto deste estudo.…”

Section: E S T a D O N U T R I C I O N A Lunclassified

Velocimetria Doppler no período neonatal em recém-nascidos a termo pequenos para idade gestacional

Muniz

Netto

Gonçalves

2003

Arq. Neuro-Psiquiatr.

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RESUMO -Este estudo teve como objetivo avaliar o fluxo sanguíneo cerebral em recém-nascidos a termo pequenos para idade gestacional, utilizando ultra-sonografia Doppler craniana ao nascimento. O estudo foi desenvolvido no CAISM/UNICAMP (Centro de Saúde Terciário para Mulheres). Foram selecionados sessenta recém-nascidos e divididos em 2 grupos: 36 adequados para idade gestacional (AIG) e 24 pequenos para idade gestacional (PIG). Foi realizada a avaliação de ultra-sonografia Doppler craniana nos grupos, entre 24-48 horas após o nascimento. A velocidade de fluxo sanguíneo cerebral foi menor no grupo PIG na artéria cerebral anterior (ACA). As medidas Doppler foram estatisticamente diferentes entre os grupos apenas para valores relacionados à velocidade de fluxo de pico sistólico (VFPS) e velocidade de fluxo médio (VFM) na ACA. Não houve diferenças significantes para nenhum dos parâmetros avaliados de velocidade de fluxo na artéria cerebral média (ACM). Concluiu-se que recém-nascidos PIG apresentaram VFPS e VFM significativamente menores apenas na ACA. A adequação peso/ idade gestacional, presença de policitemia neonatal e valores de pressão arterial média estiveram estatisticamente associados a VFM na ACA. A presença de sofrimento fetal, valores de pressão arterial média e hábito de fumar durante a gestação estiveram estatisticamente associados a VFM na ACM.PALAVRAS-CHAVE: Doppler-ultra-sonografia craniana, desnutrição intra-uterina, recém-nascido.Neonatal Doppler velocimetry in full term small-for Neonatal Doppler velocimetry in full term small-for Neonatal Doppler velocimetry in full term small-for Neonatal Doppler velocimetry in full term small-for Neonatal Doppler velocimetry in full term small-for-gestational age newborns -gestational age newborns -gestational age newborns -gestational age newborns -gestational age newbornsABSTRACT -This study aimed to evaluate the cerebral blood flow of full term small-for-gestational age newborns, using cranial ultrasound Doppler at birth. This study was performed at CAISM/UNICAMP (Tertiary Health Center for Women). Sixty term newborns were selected and divided in two groups: appropriate-for-gestational age (AGA) (36 neonates) and small-for-gestational age (SGA) (24 neonates). Cranial ultrasound Doppler evaluation was performed on both groups, between 24 and 48 hours after birth. Cerebral blood flow velocity (CBFV) was lower in the small-for-gestational age group, in the anterior cerebral artery (ACA). Doppler measurements were different statistically between the groups only for values related to peak systolic flow velocity (PSFV) and mean flow velocity (MFV) in the ACA. There was no significant difference for any evaluated parameters of flow velocity in the middle cerebral artery (MCA). It was concluded that SGA newborns showed PSFV and MFV significantly reduced only in the ACA. Weight/gestational age, neonatal polycythemia and mean arterial blood pressure values were statistically related to MFV in the ACA. In presence of fetal suffering, mean arterial blood pressure value...

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Medida da velocidade de fluxo nas artérias cerebrais utilizando ultra-som Doppler transfontanela antes e após o tratamento cirúrgico da hidrocefalia

Cited by 9 publications

References 15 publications

Investigation of possible teratogenic effects in the offspring of mice exposed to methylphenidate during pregnancy

Investigation of possible teratogenic effects in the offspring of mice exposed to methylphenidate during pregnancy

The Role of Transcranial Doppler Sonography in the Management of Pediatric Hydrocephalus

Velocimetria Doppler no período neonatal em recém-nascidos a termo pequenos para idade gestacional

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