Chap 13, Laboratory Tests and Clinical Procedures Flashcards
antiglobulin test (Coombs test)
Test for the presence of antibodies that coat and damage erythrocytes. This test determines the presence of antibodies in infants of Rh-negative women or in patients with autoimmune hemolytic anemia.
bleeding time
Time required for blood to stop flowing from a tiny puncture wound. Normal time is 8 minutes or less. Either the Simplate or the Ivy method is used. Platelet disorders and the use of aspirin prolong bleeding time.
coagulation time
Time required for venous blood to clot in a test tube. Normal time is less than 15 minutes.
complete blood count (CBC)
Determination of numbers of blood cells, hemoglobin concentration, hematocrit, and red cell values - MCH, MCV, MCHC (see Abbreviations).
erythrocyte sedimentation rate (ESR)
Speed at which erythrocytes settle out of plasma.
hematocrit (Hct)
Percentage of erythrocytes in a volume of blood.
hemoglobin test (H, Hg, Hgb, HGB)
Total amount of hemoglobin in a sample of peripheral blood.
platelet count
Number of platelets per cubic millimeter (mm3) or microliter of blood.
prothrombin time (PT)
Test of the ability of blood to clot.
red blood cell count (RBC)
Number of erythrocytes per cubic millimeter (mm3) or microliter of blood.
red blood cell morphology
Microscopic examination of a stained blood smear to determine the shape of individual red cells.
white blood cell count (WBC)
Number of leukocytes per cubic millimeter (mm3) or microliter of blood.
white blood cell differential [count]
Percentages of different types of leukocytes in the blood.
apheresis
Separation of blood into component parts and removal of a select portion from the blood.
blood transfusion
Whole blood or cells are taken from a donor and infused into a patient.
