4e099231_matocrit__Body_Fluid_Automated__Item
[Value] A manual assay will be performed whenever accurate results cannot be obtained on an automated instrument because of some intrinsic abnormality of the specimen, such as the presence of small clots. Testing is only performed on visibly bloody samples. [Item] 
Additional information
UCSF Departments of Pathology and Laboratory Medicine | Lab Manual | Laboratory Test Database | Hematocrit, Body Fluid-Automated