White Blood Cell Count # Leukocytes per cubic milliliter of blood

Norms: 5,000-10,000/cubic millimeter (higher in newborns and kids <2y.o.)

Critical: <2,500 or >30,000

Hemoglobin- grams per deciliters of blood seats (heme) in taxis(RBCs)

Norm:

Males: 14-18g/dL

Females: 12-16g/dL (>11g/dL in preg)

Slightly lower in kids 6-18 y.o.

Critical Values: <5g/dL or >20g/dL

Hematocrit: Percentage of RBCs in blood volume

Norm:

Male: 42-52%

Female: 37%-47% (>33% if preg)

High in newborns, low in kids-adolescents

Critical Value: <15% or >60%

Platelet Count: Number of platelets (thrombocytes) per cubic milliliter of blood.

Norms:

Adult/Elderly: 150,000-400,000/mm³

Critical Values:

<50,000 or >1,000,000