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Mod 6 Ch 48

Ch. 48 Hematology terms and values

hematology study of blood and tissues that produce it
Role of the MA (4) 1. Collect and process the specimen 2. Perform lab tests within scope of practice 3. Educate the patient 4. Know normal values and recognize critical situations
OSHA Occupational Safety and Health Administration
CLIA Clinical Laboratory Improvement Amendments
Functions of Blood (4) 1.Blood takes oxygen and nutrients to body and removes CO2 2. It takes wastes to lungs, liver, kidneys, and skin for elimination 3. Blood carries WBCs to fight off infection and contains platelets to begin healing 4. Assists in regulating body temp.
plasma the liquid component of blood
hematopoiesis formation of blood cells
erythrocytes red blood cells
leukocytes white blood cells
Types of White Blood Cells (5) -neutrophil -eosinophil -basophil -lymphocyte -monocyte
Blood tests Can be ordered individually or in groups called panels, profiles, or counts.
hemoglobin (Hgb) vital protein molecule found in RBCs
functions of Hemoglobin (2) 1.Carries oxygen from the lungs to the cells of the body-oxyhemoglobin 2. Carries CO2 from the body back to the lungs where it is expelled - carboxyhemoglobin
RBC count values male: 4.5-6 million / mm3 female: 4-5.5 million / mm3 pregnancy: decreased
anemia a condition where blood has a lower than normal level of hemoglobin within RBCs.
Hemoglobin values male: 14-18 g / dL female: 12-16 g / dL
hematocrit (hct) % of packed RBCs in the total volume of blood
hematocrit layers (3) -plasma floats to the top -Middle buffy layer contains WBCs and platelets -RBCs sink to the bottom
hematocrit values male: 40-50% female: 35-45%
microhematocrit "crit" performed on an extremely small sample of blood, usually in the office
Erythrocyte Sedimentation Rate (ESR) -determines the rate at which RBCs settle at the bottom of a tube. -It's related to the condition of the RBCs and the amount of fibrinogen in the plasma
WBC count values -adult: 4.5-11,000 / mm3 -low level indicates viral infection or autoimmune deficiency -elevated indicates infection -grossly elevated indicates leukemia
WBC w diff determines the % of leukocytes in a given sample
basophils produce heparin, a substance that prevents clotting
platelets -smallest cells found in the blood -live for 10 days -continually reproduce -assist in clotting -assist in healing
Protime / PT / INR -coagulation test that measures the amount of time it takes to form a clot -used in anti-coagulation (heparin) therapy
PTT -test that determines the length of time it takes for a fibrin clot to form. -It can also determine which specific clotting factors are affected
Blood Urea Nitrogen (BUN) -used to measure amount of Nitrogen in blood -indicates renal function
Cholesterol (CH, Chol) Total count: <200 mg / dL LDL < 130 mg / dL HDH > 35 mg / dL
Thyroid Stimulating Hormone (TSH) Assessment of thyroid function
Glucose Tolerance Test (GTT) -determines how quickly the body filters glucose -helps to diagnose diabetes -used to determine pregnancy-related diabetes
glycosylated hemoglobin (HbgA1C) tests the long-term (usually 3 months) control of diabetes
Phenylketonuria (PKU) -congenital disease caused by defect in metabolism of amino acid phenylalanine -tested for at birth
Mononucleosis -Epstein-Barr virus
Created by: vanstellee



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