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NBDE Part II > Coagulation / Hematopathology Pharm > Flashcards

Coagulation / Hematopathology Pharm Flashcards

1
Q

Primary hemostasis is accomplished by ______ and secondary hemostasis by ______

A

-Platelets-cascade fibrin formation

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2
Q

What forms platelets?

A

Megakaryocytes in bone marrow

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3
Q

What 4 things do platelets do to form a plug?

A

1-Adhere to exposed subendothelium/von willebrand factor2-Secrete contents of granules3-Aggregate with other platelets4-Provide a procoagulant surface for coagulation cascade

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4
Q

when thrombin is formed, soluble fibrinogen turns into what?

A

Insoluble fibrin clot

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5
Q

Which vitamin is crucial for coagulation?

A

Vitamin K*facilitates creation of calcium binding sites

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6
Q

Mediated by plasmin, what is the break down of fibrin clot resulting in fibrin degradation products such as d-dimer called?

A

Fibrinolysis

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7
Q

What three basic tests are used to evaluate hemostasis?

A

1-Platelets (count/morphology)2-Coagulation (PT, PTT)3-Fibrinolysis (d-dimer)

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8
Q

PT measures ____ pathways and PTT measures ____ pathways

A

extrinsic (12-15 sec)intrinsic (24-35 sec)

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9
Q

A normal platelet count is between 150,000-450,000/uL, what is it called when it is decreased under 100,000?

A

Thrombocytopenia*decreased bone marrow production or sequestration in spleen

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10
Q

_____ abnormalities in coagulation factors affect a single factor, ____ usually affects multiple

A

Inherited (von willebrand, hemophilia)Acquired (liver disease, it K deficiency)

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11
Q

What protein mediates lately binding to sites of vascular injury by binding collagen and GP1b receptor?

A

Von Willebrand factor (vWF)*carrier for coagulation factor VIII

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12
Q

What condition is autosomal dominant, and has mucocutaneous platelet like bleeding and often has normal PTT?

A

von Willebrand disease*Type 1 (partial quantitative) most common

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13
Q

What condition is a factor VIII deficiency, has hematomas, hemorrhage in joints and easy bleeding?

A

Hemophilia A*prolonged PTT, normal PT and platelet

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14
Q

What condition is a factor IX deficiency, has hematomas, hemorrhage in joints and easy bleeding?

A

Hemophilia B*prolonged PTT, normal PT and platelet

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15
Q

Massive systemic intravascular activation of coagulation is called?

A

Disseminated intravascular coagulation (DIC)

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16
Q

What is elevated in severe acute DIC?

A

d-dimer (fibrin degradation product)*schistocytes, decreased platelets, hematocrit, fibrinogen

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17
Q

What is the pathologic counterpart of hemostasis?

A

Thrombosis

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18
Q

What are the 3 elements of Virchows triad?

A

1-Endothelial injury2-Abnormal blood flow3-Hypercoagulability of blood

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19
Q

What is the most common inherited thrombophilia in caucasians?

A

Factor V leiden *single nucleotide change in coagulation factor V

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20
Q

How does factor V leiden affect clotting?

A

Protein C and protein S cannot degrade altered factor V, favoring fibrin formation and clotting

21
Q

What two things make up the majority of cells in a normal WBC?

A

1-Neutrophils (55%)2-Lymphocytes (35%)*eosinophils, basophils and monocytes are part of WBC as well

22
Q

What are the two broad categories of WBC disorders?

A

1-Leukocytosis (too many)2-Leukocytopenia (not enough)

23
Q

At what level of neutropenia should the patient stay in the hospital?

A

Lower than 1500 cells/ul

24
Q

Normal white blood cell counts are in what range?

A

3,500-10,000

25
What are 4 causes of leukocytosis?
1-Increased marrow production2-Increased release of marrow stores3-decreased margination4-decreased extravasation into tissues
26
What are the 3 size categories of anemia?
1-Microcytic Anemia (under 80)2-Normocytic Anemia (80-100)3-Macrocytic anemia (above 100)
27
What is the most common reason for microcytic anemia?
Iron deficiency*usually because of bleeding
28
What are 6 clinical features of iron deficiency anemia?
1-Pica (unusual craving)2-Koilonychia (thin nails)3-atrophic glossitis4-esophageal web5-pallor6-weakness
29
What are the two types of macrocytic anemia?
1-Non-megaloblastic2-Megaloblastic
30
What are the two likely causes of megaloblastic macrocytic anemia?
1-Folic acid deficiency (DNA synthesis)2-B12 deficiency
31
What three things could cause folic acid deficiency and result in megaloblastic macrocytic anemia?
1-Poor diet2-Decreased absorption (jejunal resection)3-Increased utilization
32
What are 2 absorption requirements for Vitamin B12?
1-Intrinsic factor2-Intact ileum
33
Systemically distributed neoplasms of white cells are called?
Leukemia
34
Solid tumors of hematopoietic system/neoplasms of lymphoid origin are called?
Lymphoma
35
Lymphomas and leukemias are clonal expansions of cells at certain ________
Developmental stages
36
If less than 20 % blasts in the periphery it is _____ vs more than it is _____
Chronic (mutation in peripheral maturation)Acute (mutation in bone marrow maturation)
37
Leukemia is either ____ or ____ and _____ or _____
Acute or ChronicMyeloid or Lymphoid
38
What 4 things go into go into making a diagnosis of leukemia?
1-Clinical Data2-Phenotype3-Genetic/molecular4-Morphology
39
What are the 3 sub groups of AML that the WHO recognizes?
1-Recurrent genetic abnormalities2-Multilineage dysplasi3-Not otherwise categorized
40
Lymphomas are named based on what?
Where B cell development goes wrong. Whether in bone marrow or lymphoid tissue
41
Which type of lymphoma is the minority, curable in most and has variable month-years survival?
Hodgkin Lymphoma
42
Which type of lymphoma has chronic (years), aggressive (months) and very aggressive (weeks) types and is curable in some cases?
Non-hodgkin lymphoma*indolent/chronic generally not curable
43
What are 3 clinical findings of lymphomas?
1-Enlarged, painless lymphadenopathy2-B-symptoms (fever, weight loss)3-Impingement or obstruction of other structures
44
What are the two most common types of Non hodgkin lymphoma?
1-Follicular lymphoma2-Diffuse large B cell lymphoma
45
Which lymphoma is the most common nonhodgkins lymphoma, occurs in at older age, is indolent and involves chromosomal translocation (14:18)?
Follicular Lymphoma*bone marrow involvement common
46
Which type of nonhodgkins lymphoma is derived from B-cells, and is more likely to have extra nodal sites?
Diffuse Large B Cell Lymphoma*peripheral blood involvement rare
47
Which 4 factors are vitamin K dependent?
II, VII, IX, X
48
Which factor is associated with von Willebrand disease?
VIII

NBDE Part II (13 decks)

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