RBC Basics
This is the normal lifespan of a neonatal RBC
What is 60-90 days
This is the normal WBC range for term newborns
what is 10,000-25,000 uL
Normal platelet count range in newborns
What is 150,000-400,000 uL
Time frame when a CBC should be rechecked after birth to better reflect inflammation
What is 6-12 hours
This color change suggests anemia in a neonate
What is pallor
This test measures the percentage of RBCs in the blood volume
What is hematocrit
These WBCs create antibodies to fight against viruses and bacteria
What are lymphocytes
Platelets survive this long in circulation
What is 7-10 days
This test detects maternal antibodies on fetal RBCs
What is direct Coombs test
Early sign of polycythemia in a newborn
What is plethora
These immature RBCs normally drop to less that 2% by 7 days of life
What are reticulocytes
An I/T ratio greater than this number suggests infection
What is 0.2
This condition occurs when platelets are less than 150,000
What is thrombocytopenia
Type of blood sample preferred for accurate hematocrit measurement
What is a venous sample
These marks on the skin suggest thrombocytopenia
What are petechiae
Term infants at birth typically have hemoglobin levels in this range
What is 16.5-21.5 g/dL
This term describes an abnormally low neutrophil count
What is neutropenia
This maternal condition can cause neonatal thrombocytopenia
What is ITP (Immune Thrombocytopenia Purpura)
This calculation helps evaluate neutrophil status: WBC X (% bands + % segs)
What is absolute neutrophil count (ANC)
This vital sign is often elevated in anemic infants
What is heart rate
This condition occurs when central venous hematocrit is greater than 65%
What is polycythemia
This finding indicates depletion of mature neutrophils and release of immature forms
What is a left shift
This component is required for platelet aggregation
What is fibrinogen
This test measures fetal blood in maternal circulation after suspected fetomaternal hemorrhage
What is Kleinhauer-Betke test
Collection of blood between the skull and periosteum associated with increased bilirubin
What is cephalohematoma