Question | Answer |
Presence of antibodies that coat & damage erythrocytes | Antiglobulin test |
Time required for blood to stop flowing from tiny puncture wound (< 8 min) | Bleeding time |
Simplate or Ivy method are examples of this test | Bleeding time |
Test used to check Rh- women or autoimmune hemolytic anemia | Antiglobulin test |
Test used in platelet disorders, and during use aspirin as a blood thinner | Bleeding time |
Time required for blood to clot in test tube (<15 min) | Coagulation time |
# of WBC, RBC, platelets, hemoglobin, hematocrit, red cell indices (MCH, MCV, MCHC) | Complete blood count - CBC |
Speed at which erythrocytes settle out of plasma | Erythrocyte sedimentation rate (sed rate) |
Sed rate increases due to... | Infection, joint inflammation, tumor, which increases fibrinogen content of blood |
Percentage of Erythrocytes in volume of blood | Hematocrit (Hct) |
Blood is spun in centrifuge so erythrocytes fall to the bottom | Hematocrit (Hct) |
Amount of hemoglobin in sample | Hemoglobin (H, Hg, HGB) |
Presence of plasma factors that act in a portion of the coagulation pathway | Partial thromboplastin time (PTT) |
Monitor patients on anticoagulants such as heparin | Partial thromboplastin time (PTT) |
# of platelets per mm3 or microliter (150,000-350,000) | Platelet count |
Ability of blood to clot | Prothrombin time (PT) |
Time elapsed between adding calcium & thromboplastin to a plasma sample, and the appearance of a visible clot | Prothrombin time (PT) |
Monitor patients on anticoagulant coumadin (warfarin) | Prothrombin time (PT) |
# of erythrocytes per mm3 or microliter (4-6 mil) | Red blood cell count (RBC) |
Microscopic exam of stained blood smear to determine cell shape | Red blood cell morphology |
# of leukocytes per mm3 or microliter(500-10,000) | White blood cell count (WBC), automated counters |
Percentage of total WBC of different types of leukocytes | White blood cell differential. Manual differential is when cells are tained/counted under microscope by a technician to determine percentages. |
Increase in immature neutrophils term, indicating body's effort to fight severe infection | Shift to the left |