Hemotology Flashcards
Thrombocytopenia
Inability to clot
Sites of stem cell production in adults
- Pelvis
- Vertebrae
Difference between serum and plasma?
Plasma still has the clotting factors while serum is plasma without the clotting factors.
An immature RBC
Reticulocyte
What drives the body to create new RBC (erythropoiesis)?
Hypoxia ( decrease o2) reaches the kidneys which release erythropoietin, which stimulates the red bone marrow, which causes erythropoiesis (creation of RBC).
What is Hypoxia?
Not enough O2 in the body
WBC
4,000-11,000 normal
Values for significant elevated WBC
15,000-20,000
Function of blood?
-TRANSPORT O2, CO2, Hormones, waste, food -PROTECTION Clotting, phagocytosis, antibody production -DISTRIBUTION OF BODY HEAT Temp. Regulation
RBC
4-6
HGB/ HB
12-18
Hct
38-54%
Neutrophil values
3,000-7,500 (50-70%)
Mature neutrophils
“segs”
Immature neutrophils
“bands”
Basophils
granules contain heparin, seratonin, histamine, released for allergic or inflammation response.
Eosinophils
defense against parasites
Monocytes
2nd responder to neutrophils, stay longer, increase with all types of infection
Lymphocytes
B & T cells, More for autoimmune and cancer,
Indicies
physical appearance of the cell
Platelets
150,000-400,000
Less than 20,000 platelets
risk for spontaneous bleeds
Less than 5,000 platelets
fatal bleed
Thrombocytopnia
Platelets deficiency
Thrombocytosis
Excessive platelets
100,000 platelets
watch out for petechiae (red dotted rash) and ecchymosis (bruising)
Clotting process
Vasoconstriction, Vasospasm, platelets are activated and become sticky, unstable clot
Fibrin threads
Make unstable clots more stable
What are the three pathways in the clotting factors?
Intrinsic, Extrinsic, Common pathways
Intrinsic pathway
Faster pathway, for internal (within the blood), has 4 steps (XII, XI, IX, VIII)
Extrinsic pathway
Slower pathway, For injury to tissue or vessles, has two step (Tissue Factor, VII)
Common Pathway
where intrinsic and extrinsic pathways end/meet, has five steps (X, V, II, I, Fibrin Clot)
aPTT Route
measures Intrinsic & Common Pathways
PT/INR Route
measures Extrinsic & Common Pathways
Increase Values of aPTT/PT
Clotting too slow
Decrease Values of aPTT/PT
Clotting too fast (prone to clots)
Antithrombins
Lysis clots by endogenous heparin (it interferes with thrombin)
Fibrinolysis
Lysis clots by dissolution small molecules ( Attack fibrin strands) LABS: FDP & FSP
Mature neutrophils
“segs”
Immature neutrophils
“bands”
Basophils
granules contain heparin, seratonin, histamine, released for allergic or inflammation response.
Eosinophils
defense against parasites
Monocytes
2nd responder to neutrophils, stay longer, increase with all types of infection
Lymphocytes
B & T cells, More for autoimmune and cancer,
Indicies
physical appearance of the cell
Platelets
150,000-400,000
Thrombocytopnia
Platelets deficiency
Thrombocytosis
Excessive platelets
100,000 platelets
watch out for petechiae (red dotted rash) and ecchymosis (bruising)
Clotting process
Vasoconstriction, Vasospasm, platelets are activated and become sticky, unstable clot
Fibrin threads
Make unstable clots more stable
What are the three pathways in the clotting factors?
Intrinsic, Extrinsic, Common pathways
Intrinsic pathway
Faster pathway, for internal (within the blood), has 4 steps (XII, XI, IX, VIII)
Extrinsic pathway
Slower pathway, For injury to tissue or vessles, has two step (Tissue Factor, VII)
Common Pathway
where intrinsic and extrinsic pathways end/meet, has five steps (X, V, II, I, Fibrin Clot)
aPTT Route
measures Intrinsic & Common Pathways
PT/INR Route
measures Extrinsic & Common Pathways
Increase Values of aPTT/PT
Clotting too slow
Decrease Values of aPTT/PT
Clotting too fast (prone to clots)
Antithrombins
Lysis clots by endogenous heparin (it interferes with thrombin)
Fibrinolysis
Lysis clots by dissolution small molecules ( Attack fibrin strands) LABS: FDP & FSP
Hemodilution
Hct lower than Hgb To much fluids Burn pt Not enough RBC production Cemo pt
Hemoconcentration
Higher Htc than 3x Hgb
Not enough fluids
Too much RBC production
Macrocytic anemias
B12
Pernicious anemia
Folic Acid
Microcytic anemias
Iron Deficiency
aPTT time
25-35sec
PT time
11-16 sec
INR time
2-3sec
Coumadin antidote
Vitamin K
Heparin antidote
Protamine sulfate