WorksheetsHema thrombosis and coagulation
Total questions: 56
Worksheet time: 28mins
Name
Class
Date
1.
A patient presents with mucocutaneous bleeding including gum bleeding and petechiae but appears generally well and non-toxic. Which combination of initial laboratory findings best supports a diagnosis of ITP over DIC or TTP?
a)
Normal PT/PTT and Normal D-dimer
b)
Prolonged PT/PTT and Elevated Fibrinogen
c)
Fragmented RBCs and Low Fibrinogen
2.
The primary mechanism leading to platelet destruction in ITP involves autoantibodies coating the platelets, leading to subsequent clearance by which specific cellular location?
a)
Macrophage recognition in the spleen
b)
Consumption in microvascular thrombi
c)
Autoactivation leading to aggregation in circulation
3.
Which finding, if present in a thrombocytopenic patient, is pathognomonic for ITP over DIC or TTP?
a)
Fragmented RBCs (Schistocytes) on peripheral smear
b)
Increased PT/PTT and Decreased Fibrinogen
c)
Normal PT/PTT, Normal Fibrinogen, and Normal D-dimer
4.
Given suspected ITP, which diagnostic step is critical to perform after confirming a low platelet count, to evaluate for concomitant microangiopathic processes before labeling it ITP?
a)
Bone marrow examination
b)
Peripheral blood smear
c)
Thrombopoietin receptor agonist challenge
5.
An adult patient with confirmed chronic ITP is stable, without active bleeding, and has a platelet count of 45,000/µL. Based on treatment indications, what is the most appropriate initial management strategy?
a)
Initiate Steroid therapy immediately
b)
Splenectomy due to chronic course
c)
Keep observing and monitoring the patient
6.
Which first-line treatment for ITP functions by coating Rh+ red cells to confuse the spleen and macrophages, thereby diverting the immune destruction away from the platelets and increasing the platelet count?
a)
Intravenous Immunoglobulin (IVIG)
b)
Prednisone (Steroids)
c)
Anti-Rh0 (D) immunoglobulins
7.
ITP is classified into acute and chronic courses primarily based on age. What best describes the typical prognosis difference?
a)
Adults usually have acute presentation that remits quickly
b)
Children usually have a chronic course requiring long-term treatment
c)
ITP is acute in children, usually remitting within six months, but chronic in adults
8.
Which patient population with ITP is generally monitored closely rather than treated unless they meet specific criteria, due to the high likelihood of spontaneous remission?
a)
Patients with concurrent SLE
b)
Adults with chronic ITP
c)
Children with acute ITP
9.
A patient presents with thrombocytopenia, signs of microangiopathic hemolytic anemia, and fever. Which additional clinical finding is necessary to complete the classic diagnostic pentad of TTP?
a)
Severe Splenomegaly
b)
Renal failure
c)
Severe gastrointestinal hemorrhage
10.
The pathophysiology of TTP results from the accumulation of large von Willebrand Factor (vWF) multimers due to the deficiency of which cleaving enzyme?
a)
Thrombin
b)
ADAMTS13
c)
Plasmin
11.
What is the pathognomonic finding on the peripheral blood smear that confirms the presence of microangiopathic hemolytic anemia characteristic of TTP and DIC?
a)
Target cells
b)
Fragmented red blood cells (Schistocytes)
c)
Hypersegmented neutrophils
12.
Upon high clinical suspicion of TTP (pentad present), which intervention must be initiated immediately, regardless of whether definitive laboratory results are back, due to the severity of the disease?
a)
High-dose steroids
b)
Plasmapheresis with plasma exchange
c)
Platelet transfusion
13.
In TTP, the formation of microthrombi consumes platelets but usually spares coagulation factors. What is the typical resulting laboratory interpretation of PT and PTT?
a)
Both PT and PTT are markedly prolonged
b)
Both PT and PTT are normal or slightly increased
c)
PT is normal but PTT is prolonged
14.
Plasma exchange is the definitive treatment for TTP because it removes which two detrimental components from the patient's plasma?
a)
Thrombin excess and Fibrin degradation products
b)
ADAMTS13-antibodies and large vWF multimers
c)
Platelet factor 4 and Immunoglobulin G
15.
Which condition is cited as a major risk factor or underlying condition that can push patients toward developing TTP?
a)
Congenital Factor VII Deficiency
b)
Chronic Hepatitis C
c)
HIV infection
16.
What is the expected prognosis for a patient diagnosed with TTP if appropriate, urgent treatment is delayed or not administered?
a)
Chronic course with manageable relapses
b)
Around 50% chance of developing chronic kidney disease
c)
Around 95% mortality
17.
A patient, recently started on unfractionated heparin, develops a significant drop in platelet count alongside confirmed new venous thrombosis. This clinical picture is characteristic of which disorder?
a)
TTP (Thrombotic Thrombocytopenic Purpura)
b)
HIT (Heparin-Induced Thrombocytopenia)
c)
Chronic ITP (Immune Thrombocytopenia)
18.
The pathological mechanism in HIT involves an immune response where immunoglobulin recognizes an immune complex formed by heparin and which specific platelet protein?
a)
Glycoprotein IIb/IIIa
b)
Factor IX
c)
Platelet Factor 4 (PF4)
19.
A patient received heparin 8 days ago, and their platelet count has fallen by 60% with a nadir of 25,000/µL. How many points would this timing of platelet count fall score on the 4T Score?
a)
1 point (Consistent with days 5–10 fall, but not clear)
b)
0 points (Platelet count fall < 4 days without recent exposure)
c)
2 points (Clear onset between days 5-10)
20.
In a patient highly suspected of having HIT, what is the single most urgent priority step in management and diagnostic workup?
a)
Administering an anti-CD20 antibody (Rituximab)
b)
Performing a bone marrow biopsy
c)
Discontinuing heparin immediately
21.
A patient is evaluated for suspected HIT and is assigned a total 4T Score of 6. Based on the validation data, what is the estimated probability that this patient will test positive for the HIT antibody?
a)
0.008
b)
0.11
c)
0.34
22.
If a diagnosis of HIT is confirmed, why must low molecular weight heparins (e.g., Enoxaparin) be avoided as an alternative anticoagulant?
a)
They require too much monitoring
b)
They stimulate antithrombin III too aggressively
c)
They also have the potential to induce HIT
23.
The 4T Score is a clinical prediction rule used primarily for which diagnostic purpose?
a)
To stage the severity of DIC
b)
To determine the prognosis of ITP
c)
To predict the likelihood of a positive HIT antibody test
24.
In the 4T scoring system, which event is given 2 points under the "Thrombosis or other sequelae" category?
a)
Suspected thrombosis (not proven)
b)
Non-necrotizing (erythematous) skin lesions
c)
New confirmed thrombosis or skin necrosis
25.
In the pathophysiology of DIC, the initial event triggering the entire catastrophic cascade is the uncontrolled generation of thrombin due to the widespread activation of which factor?
a)
Factor V
b)
Tissue Factor (TF)
c)
Plasmin
26.
The development of multiple organ failure in DIC is primarily a result of what consequence of fibrin deposits in the microcirculation?
a)
Consumption of all coagulation factors
b)
Massive diffuse bleeding
c)
Ischemic tissue damage
27.
Which laboratory marker, resulting from the fibrinolytic system going into overdrive (secondary fibrinolysis), is considered the single most sensitive test for DIC?
a)
Thrombin Time
b)
D-dimer or Fibrin degradation products
c)
Platelet factor 4 (PF4)
28.
A critically ill patient with underlying sepsis is suspected of having DIC. Which is the highest priority tool used to formally confirm the laboratory diagnosis?
a)
DIC Scoring System (ISTH Score)
b)
ADAMTS13 Activity Assay
c)
Prothrombin Index (if PT is not reported in seconds)
29.
A patient's DIC score is calculated. Which set of results would contribute the maximum possible score (3 points) from a single laboratory category?
a)
Platelet count < 50,000/µL
b)
Fibrinogen level < 100 mg/dL
c)
Strong increase in D-dimer/Fibrin degradation products
30.
In the supportive care for DIC, why is Fresh Frozen Plasma (FFP) administered?
a)
To provide platelets for clotting
b)
To reduce clot formation in chronic DIC
c)
To replenish consumed coagulation factors
31.
Which underlying malignancy is explicitly noted to be frequently associated with triggering Disseminated Intravascular Coagulation (DIC)?
a)
Chronic Myelogenous Leukemia (CML)
b)
Acute Promyelocytic Leukemia (APL)
c)
Hodgkin Lymphoma
32.
The prognosis of DIC is summarized by which statement?
a)
It typically remits acutely within six months
b)
It has a catastrophic course and patients often will not survive it
c)
It is highly manageable with plasmapheresis alone
33.
A patient presents with recurrent, painful, tender, and warm swelling in the knee joint (hemarthrosis). This presentation suggests an inability to perform which stage of the hemostasis process?
a)
Primary hemostasis (platelet plug formation)
b)
Secondary hemostasis (stable fibrin clot formation)
c)
Fibrinolysis (clot remodeling)
34.
Hemophilia A and Hemophilia B are clinically indistinguishable X-linked recessive bleeding disorders. They result from the deficiencies of which two respective clotting factors?
a)
Factor VIII and Factor IX
b)
Factor IX and Factor X
c)
Factor VIII and Von Willebrand Factor
35.
What is considered the classic manifestation of a severe coagulation factor deficiency that involves bleeding into a well-protected area of the body?
a)
Mucocutaneous bleeding (epistaxis)
b)
Iliopsoas bleed and Hemarthrosis
c)
Fragmented RBCs
36.
Since Hemophilia A and B are clinically indistinguishable, what is the definitive diagnostic test required to establish the specific diagnosis?
a)
Peripheral blood smear for schistocytes
b)
Factor VIII and Factor IX level assays
c)
Prothrombin Time (PT) and Fibrinogen level
37.
A patient with Hemophilia A has an active clotting factor level measured at 4% of normal (IU/dl). How is this severity classified, and what bleeding pattern is expected?
a)
Severe spontaneous bleeding into joints
b)
Moderate occasional spontaneous bleeding
c)
Mild spontaneous bleeding is rare
38.
A patient with Hemophilia B requires immediate Factor IX replacement, but factor concentrates are temporarily unavailable. Which alternative blood product is indicated for this patient?
a)
Fresh Frozen Plasma (FFP)
b)
Cryoprecipitates
c)
Cryosupernates
39.
The inheritance pattern of Hemophilia A and B means that a mother who is a carrier (heterozygous) has what probability of having a son who expresses the hemophilia trait?
a)
0% (Sons are protected by the normal paternal Y chromosome)
b)
50% (50% chance of inheriting the defective X chromosome)
c)
100% (All sons will express the recessive trait)
40.
Repeated bleeding episodes into the same joint spaces over time lead to chronic swelling and eventual destruction, creating what pathology in Hemophilia patients?
a)
Neurologic findings
b)
Target joints
c)
Aplastic anemia
41.
A patient presents with a history of easy bruising, prolonged bleeding after cuts, and frequent nosebleeds. These mucocutaneous findings suggest a defect in which essential function of von Willebrand factor (vWF)?
a)
Fibrinolysis
b)
Platelet adhesion
c)
Thrombin generation
42.
Besides linking platelets to the vessel wall, what is the critical secondary role of vWF in the coagulation cascade?
a)
It activates Factor VII
b)
It protects Factor VIII from premature destruction
c)
It directly converts prothrombin to thrombin
43.
Since vWF deficiency impairs platelet adhesion and Factor VIII protection, which lab finding is often the primary measure of the disease's secondary effect on coagulation?
a)
Fragmented red blood cells
b)
Decreased Factor VIII levels
c)
Normal PTT
44.
Von Willebrand Disease is the most frequently encountered inherited disorder of hemostasis. How is its mode of inheritance described?
a)
X-linked recessive
b)
Autosomal dominant or recessive
c)
Acquired, autoimmune
45.
A patient with VWD is found to have sufficient quantities of vWF protein, but the protein is structurally abnormal and non-functional. How is this classified?
a)
Type 1 (Quantitative defect)
b)
Type 2 (Qualitative defect)
c)
Type 3 (Quantitative and Qualitative defect)
46.
The administration of desmopressin is used as treatment for VWD due to which specific physiological mechanism?
a)
It serves as an alternative anticoagulant
b)
It releases stored vWFs from the endothelium
c)
It promotes the consumption of large vWF multimers
47.
Which type of VWD is described as the "worst of all types," characterized by both low production and dysfunctional vWF, often presenting with severe bleeding similar to hemophilia?
a)
Type 1
b)
Type 2
c)
Type 3
48.
What is the major clinical downside or limitation associated with the use of Desmopressin in the treatment of VWD?
a)
It can induce HIT
b)
Patients can rapidly develop tachyphylaxis
c)
It destroys stored Factor VIII
49.
A patient develops deep vein thrombosis (DVT) following a lengthy orthopedic surgery requiring several days of immobilization. According to Virchow’s Triad, this event is primarily driven by which component?
a)
Endothelial injury
b)
Hypercoagulability
c)
Circulatory stasis
50.
Venous thrombosis forms “red clots.” What is the dominant structural component of these clots, contrasting them with the “white clots” found in arterial thrombosis?
a)
Platelet aggregates
b)
Fibrin-rich mesh trapping red blood cells
c)
Cholesterol and foam cells
51.
According to the concept of Virchow’s Triad, which component is cited as the single most important factor for the initial development of thrombosis?
a)
Endothelial injury (Vascular damage)
b)
Hypercoagulability
c)
Circulatory stasis
52.
When taking the history of a patient who presents with thrombosis, what is the most important classification question to ask for predicting recurrence risk and planning long-term treatment?
a)
Was the thrombosis arterial or venous?
b)
Was the thrombosis provoked or unprovoked?
c)
Was the patient dehydrated prior to the event?
53.
A venous thrombosis forms a "red clot" predominantly in conditions of low blood flow (stasis). This environment allows the formation of which type of clot matrix?
a)
Platelet-rich, white clot
b)
Fibrin-rich, red clot
c)
Clot primarily composed of smooth muscle cells
54.
A patient experiences unprovoked venous thrombosis. Based on the understanding of recurrence risk, what is the likely therapeutic consequence for this patient?
a)
Short-term anticoagulant therapy (3 months)
b)
Treatment with an anticoagulant indefinitely
c)
Immediate plasma exchange
55.
The inherited risk factor for venous thrombosis known as Factor V Leiden mutation is related to resistance to the anticoagulant effects of which endogenous plasma protein?
a)
Thrombin
b)
Activated Protein C
c)
Antithrombin III
56.
Which specific historical finding is identified as the strongest predictor in venous thrombosis recurrence, often leading to the need for indefinite anticoagulation?
a)
Previous history of malignancy
b)
Age > 60 years
c)
Unprovoked thrombosis
100 %
