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Titolo:
A SIMPLE SIMULATION FOR THE VISUALIZATION OF CSF FLOW IN INFANTS WITHHYDROCEPHALUS
Autore:
PERKINS AC; LAWES SC; MITCHELL LA; JASPAN T;
Indirizzi:
UNIV NOTTINGHAM HOSP,QUEENS MED CTR,DEPT MED PHYS NOTTINGHAM NG7 2UH ENGLAND UNIV NOTTINGHAM HOSP,DEPT RADIOL NOTTINGHAM NG7 2UH ENGLAND
Titolo Testata:
Ultrasound in medicine & biology
fascicolo: 1, volume: 20, anno: 1994,
pagine: 21 - 26
SICI:
0301-5629(1994)20:1<21:ASSFTV>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
CEREBROSPINAL-FLUID CSF; SPECTRAL-ANALYSIS; ULTRASOUND; INVITRO;
Keywords:
CFS FLOW; CRANIAL DOPPLER; CAVITATION EFFECTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
12
Recensione:
Indirizzi per estratti:
Citazione:
A.C. Perkins et al., "A SIMPLE SIMULATION FOR THE VISUALIZATION OF CSF FLOW IN INFANTS WITHHYDROCEPHALUS", Ultrasound in medicine & biology, 20(1), 1994, pp. 21-26

Abstract

Cerebrospinal fluid (CSF) flow was demonstrated incidentally in our unit during the routine cranial colour Doppler examination of infants with hydrocephalus. Pulsed Doppler analysis of the flow jets within CSFhas shown that for each CSF flow jet there is a characteristic sinusoidal wave pattern that decreases in amplitude at the end of each jet episode. Any activity that transiently elevates the intracranial pressure, such as crying, increased the intensity of this signal. A study was subsequently carried out to investigate the origin of these clinicalobservations of CSF flow. Using a simple flow phantom, experiments with degassed water demonstrated the transient production of a Doppler signal at a stenosis in an otherwise uniform bore tube. We postulate that in infants with obstructive hydrocephalus, high CSF velocities in excess of 25 cm/s are produced as a result of the pressure caused by the excess cerebrospinal fluid. In some instances fluid jets may give rise to the production of microbubbles that act as transient but extremely efficient reflectors for the ultrasound, thus enabling the visualisation of CSF flow in these patients.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/01/20 alle ore 13:00:24