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RMLClinicalHemCV

Clinical Hematology
​Critical Values

Test Patient Age Critical Values
APTT All > 100 seconds
Absolute neutrophil count All outpatients < 0.500 th/uL
Absolute lymphocyte count Neonates
(<28 days)		 < 2,500 th/uL
Hematocrit 0 to 6 months < 20 %
Hemoglobin All < 6 gm/dL
INR All > 7
Platelets 0 to 6 months and
all outpatients

6 months to adult 		< 20,000 /uL


< 10,000 /uL
WBC All outpatients > 40,000 /uL
Rev. 11/07