Abstract:
:A prospective study was undertaken using a range-gated, pulsed Doppler velocimeter to study flowpressure relationships in the anterior cerebral artery. Serial velocity and pressure studies were performed with each infant serving as his or her own control. The hypothesis tested was that ill preterm infants sustaining subependymal/intraventricular hemorrhage would have absent autoregulation. The hypothesis has been tested in 88 studies on 32 infants. Of 32 infants studied, 15 were judged to be pressure passive; nine of these children bled. The other 17 infants were not pressure passive; eight of these children bled (P greater than .05). From these studies, it may be concluded that the pressure passive state is not the final common link in the genesis of subependymal/intravertricular hemorrhage. Pulsed Doppler ultrasound may provide an extremely useful noninvasive technique for studying both the arterial and venous sides of the cerebral circulation.
journal_name
Pediatricsjournal_title
Pediatricsauthors
Ahmann PA,Dykes FD,Lazzara A,Holt PJ,Giddens DP,Carrigan TAsubject
Has Abstractpub_date
1983-11-01 00:00:00pages
665-9issue
5eissn
0031-4005issn
1098-4275journal_volume
72pub_type
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