is a clinical laboratory abbreviation for Quantity Not Sufficient
. This indicates that either
1.) There is not enough specimen for the lab tests ordered to be performed.
2.) In the case of Vacutainers
or other tubes with pre-added anticoagulant, the amount of blood evacuated into the tube at the time of Phlebotomy
was insufficient to attain the correct blood:anticoagulant ratio. This can cause false results in assays such as coagulation
assays (Causing falsely increased clotting times) or Blood Cell Differentials (Causing a false increase in poikilocytes
, particularly burr cells.)
In either case, the most common and feasible way to correct the problem is to simply recollect the specimen.