Analyte or Test Procedure
Cell identification or white blood cell differential
Erythrocyte count
Hematocrit (excluding spun microhematocrit)
Hemoglobin
Leukocyte count
Platelet count
Fibrinogen
Partial thromboplastin time
Prothrombin time
Neutrophilic granulocytes
Eosinophilic granulocytes
Basophilic granulocytes
Lymphocytes
Monocytes
Major red and white blood cell abnormalities
Immature red and white blood cells
Criteria for Acceptable Performance
The criteria for acceptable performance are:
Analyte or test | Criteria for acceptable performance |
Cell identification | 90% or greater consensus on identification. |
White blood cell differential | Target ±3SD based on the percentage of different types of white blood cells in the samples. |
Erythrocyte count | Target ±6%. |
Hematocrit (Excluding spun hematocrits) | Target ±6%. |
Hemoglobin | Target ±7%. |
Leukocyte count | Target ±15%. |
Platelet count | Target ±25%. |
Fibrinogen | Target ±20%. |
Partial thromboplastin time | Target ±15%. |
Prothrombin time | Target ±15%. |
42 C.F.R. §493.941