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Hematology 3 Exam 2
Reynolds
76
Medical
Graduate
02/28/2011

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Cards

Term
What is considered a 'true' bruise?
Definition
ecchymosis
Term
What 'cleans up' a bruise?
Definition
macrophages eat free RBC
Term
What is released when bruises are cleaned up?
Definition
1) hemoglobin (red) 2) bilirubin (yellow) 3) hemosiderin (brown)
Term
What is hemostasis?
Definition
Control of bleeding
Term
What is the immediate reaction to damaged blood vessels?
Definition
vasoconstriction
Term
What is primary hemostasis?
Definition
platelet activation
Term
What is secondary hemostasis?
Definition
coagulation
Term
How are clots regulated?
Definition
Anti-thrombotic counter-regulation
Term
Name 3 steps of platelet activation
Definition
adhesion, release of intracellular granules, aggregation of platelets
Term
What is the coagulation cascade?
Definition
Secondary hemostasis
Term
What is the final product of coagulation?
Definition
fibrin clot
Term
What is intrinsic initation?
Definition
Blood
Term
What is extrinsic initiation?
Definition
tissue injury
Term
What are the 4 types of coagulation blood tests?
Definition
platelet count, Partial Thromoboplastin Time (PTT), Prothrombin Time (PT), Bleeding time
Term
What is PTT?
Definition
Partial thromboplastin time, it is intrinsic
Term
What are the clotting factors of the intrinsic pathway we must know?
Definition
VIII, IX, XII
Term
What are the extrinsic clotting factors we must know?
Definition
VII
Term
Where can RBC's be damaged?
Definition
At bifurcation of blood vessels "hits the median"
Term
What is epistaxis?
Definition
nosebleeds
Term
What is the major cause of BV wall fragility?
Definition
aging
Term
What are secondary causes of BV wall fragility?
Definition
medications (glucocorticosteroids, penicillin, sulfa), Vit C deficiency
Term
What is Vit C related BV wall fragility called?
Definition
Scurvy
Term
What is uncommon with BV wall fragility?
Definition
internal bleeding and anemia, this is usually limited to superficial bleeds
Term
What are the lab test results for BV wall fragility?
Definition
All normal
Term
What is the result of Avitaminosis C?
Definition
decreased collagen formation --> weak vessels
Term
How long does scurvy take to develop?
Definition
4-8 months
Term
What is a thrombocyte?
Definition
platelets
Term
What is thrombocytopathia?
Definition
abnormal platelet FUNCTION
Term
What is primary thrombocytosis often associated with?
Definition
Seen with polycythemia vera
Term
What is another term for primary thrombocytosis?
Definition
essential thrombocytosis
Term
What is another term for secondary thrombocytosis?
Definition
reactive thrombocytosis
Term
What are causes of reactive thrombocytosis?
Definition
trauma, CANCER, blood loss, infections, inflammatory dx
Term
What are the signs and symptoms of thrombocytopenia?
Definition
Low platelet count, prolonged bleeting times, but normal PT and PTT
Term
What can cause decreased platelet production?
Definition
infections, drugs, anemia (B12 and folate deficiency)
Term
What can cause decreased platelet survival/increased destruction?
Definition
drugs, autoimmune
Term
What is ITP?
Definition
idiopathic thrombocytopenia purpura
Term
What is the cause of ITP?
Definition
autoimmune, anti-platelet Ab
Term
What is the tx of ITP?
Definition
steriods, sometimes splenectomy, platelet transfusions
Term
What are the main demographics of ITP?
Definition
Children 2-6 after a viral infection, women 20-40 years old
Term
What are the medications that can cause thrombocytopathia?
Definition
aspririn, NSAID's
Term
What are the two main types of coagulation disorders?
Definition
Hereditary and acquired
Term
What is hemarthrosis?
Definition
blood in the joint
Term
What is hemophilia A?
Definition
A Factor VIII deficiency
Term
What is an abnormal blood test result for hemophilia A
Definition
prolonged PTT, normal Von Willebrand Factor (vWF)
Term
How is Hem A passed?
Definition
X linked recessive, only seen in males, women only carriers
Term
What is the treatment of hemophilia A?
Definition
Factor VIII transfusions
Term
What blood component can be genetically synthesized articficially?
Definition
Factor VIII
Term
What is vWF?
Definition
Von Willebrand Factor, deficiency is Von Willebrand dx
Term
What does vWF do?
Definition
Facilitates platelet adhesion to vessel
Term
What is a blood test sign of vWF?
Definition
prolonged PTT
Term
How is vWF acquired?
Definition
genetically, autosomal dominant, both sexes equally affected
Term
What is the most common inherited bleeding disorder?
Definition
vWF dx
Term
What is vWF dx treatment?
Definition
plasma, factor VIII, vWF transfusions
Term
What causes hemophilia B?
Definition
Factor IX deficiency
Term
What are the abnormal blood tests with Hem B?
Definition
prolonged PTT
Term
How is hem b passed?
Definition
x-linked recessive trait, females are carriers, males affected
Term
How is Hem B treated?
Definition
factor IX replacement
Term
Where are vit K dependent factors made?
Definition
liver
Term
What are the blood test abnormalities of vit K deficiency?
Definition
prolonged PTT and PT
Term
What can cause Vit K deficiency?
Definition
diet, malabsorption or liver failure
Term
How to treat Vit K deficiency?
Definition
fresh frozen plasma, vit K
Term
What does rattlesnake venom cause?
Definition
hemotoxin, neurotoxin, coagulopathy
Term
What is coagulopathy?
Definition
fibrinogen deficiency
Term
What is Virchow's Triad?
Definition
Blood clot: Vessel wall injury, blood flow, hypercoagulability
Term
What is the major cause of thrombosis?
Definition
vessel wall injury
Term
What initiates a thrombosis in BV?
Definition
Endothelial injury exposes collagen
Term
What is DVT?
Definition
Deep Vein thrombosis
Term
What are risk factors for DVT?
Definition
elderly, recent surgery, bedridden, cancer
Term
What is one way to find a DVT?
Definition
doppler ultrasound
Term
What are common thrombus treatments?
Definition
platelet inhibitors, anticoagulants, thrombolytics
Term
What are common platelet inhibitors?
Definition
Aspirin (ASA), NSAID's, Plavix
Term
Name 2 anticoagulants
Definition

heparin (intrinsic)

 

warfarin (extrinsic)

Term
What does Heparin affect?
Definition
PTT (intrinsic pathway)
Term
What is DIC?
Definition
Disseminated intravascular coagulation
Term
What does DIC cause?
Definition
clotting AND bleeding at the same time, hard to treat
Term
What is a clinical sign of DIC?
Definition
increased fibrin degradation products (FDP)
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