In this issue, Philip et al present data concerning the declining incidence of intraventricular hemorrhage in the premature infant in the 1980s without planned intervention. Before discussing the implications of this work, it may be useful to review some of the pertinent features of intraventricular hemorrhage in the neonate.
Intraventricular hemorrhage is characteristic of the premature infant, particularly the infant less than 32 weeks' gestation. Bleeding typically emanates from capillaries in subependymal germinal matrix, a gelatinous area containing an elaborate but immature capillary bed which, in turn, is subserved by an abundant arterial and venous supply. It is a transitional zone that becomes less prominent during the last 12 to 16 weeks of gestation and is essentially exhausted at term.
- Copyright © 1989 by the American Academy of Pediatrics