Author(s): Jeevasankar M, Agarwal R, Chawla D, Paul VK, Deorari AK
Abstract Share this page
Abstract Polycythemia is defined as a venous hematocrit of over 65\%. The hematocrit in a newborn peaks at 2 hours of age and decreases gradually after that. The etiology of polycythemia is related either to intra-uterine hypoxia or secondary to fetal transfusion. The relationship between hematocrit and viscosity is almost linear till 65\% and exponential thereafter. Increased viscosity of blood is associated with symptoms of hypo-perfusion. Clinical features related to polycythemia-hyperviscosity syndrome may affect all organ systems and this entity should be screened for in high-risk infants. Polycythemia may or may not be symptomatic and guidelines for management of both the types based on the current evidence are provided in the protocol.
This article was published in Indian J Pediatr
and referenced in Journal of Neonatal Biology