DVT (TEST 2) QUESTIONS AND
ANSWERS
look at case study example on ppt - Correct Answers -
DVT overview - Correct Answers -Deep vein thrombosis, or DVT, is a blood clot that
forms in a vein deep in the body. Most deep vein clots occur in the lower leg or thigh. If
the vein swells, the condition is called thrombophlebitis. A deep vein thrombosis can
break loose and cause a serious problem in the lung, called a pulmonary embolism.
DVT of lower extremities (2) - Correct Answers -1. distal calf vein thrombosis (remain
confined to deep calf veins)
2. proximal vein thrombosis (involves popliteal, femoral, and iliac veins)
which vein thrombosis is more commonly associated with development of pulmonary
embolism - Correct Answers -proximal vein thrombosis
Distal calf vein thrombosis - Correct Answers --peroneal anterior or posterior tibial veins
-don't involve popliteal vein
-veins below popliteal vein
-much less likely to cause or propagate into pulmonary system
if you don't treat proximal vein thrombosis, the patient will have a ____ % chance of
having a PE and die in sleep - Correct Answers -50%
DVT: What is Virchows Triad - Correct Answers -1. alterations in blood flow (stasis)
2. vascular endothelial injury
3. alterations in the constituents of blood (inherited or acquired hypercoaguable state)
Virchow's Triad: alterations in blood flow (stasis)
-what are the common causes (4) - Correct Answers -1. atrial fibrillation (stagnant and
forms clots, goes through heart and into lungs
2. LV dysfunction (only pumping 15% of blood, blood lays on bottom of heart and forms
clot)
3. bed rest/immobilization/paralysis
4. venous obstruction from tumor/obesity/pregnancy
what are the DDXs of DVT (8) - Correct Answers -1. muscle strain
2. lymphangitis or lymph obstruction
3. venous insufficiency
, 4. Baker's cyst (degenerative changes in popliteal fossa)
5. cellulitis (hardest to differentiate)
6. internal derangement of knee
7. superficial thrombophlebitis
8. drug induced edema (CCB, haloperidine)
What is the Wells Score for DVT - Correct Answers -clinical prediction/pretest
probability of having DVT
-determines what labs/radiological procedures you will do
a low probability Wells score + d-dimer = - Correct Answers -neg predictive value of
99%
Virchow's Triad: Abnormalities of surfaces in the contact with blood
-common causes (7) - Correct Answers -1. vascular injury/trauma
2. heart valve disease
3. atherosclerosis
4. indwelling catheters
5. previous DVT
6. fractures
7. chemical irritation
Virchow's Triad: Abnormalities of clotting components
-common causes (11) - Correct Answers -1. protein c def
2. protein s def
3. antithrombin def
4. factor 5 Leiden
5. antiphospholipid antibody syndrom
6. estrogen/OCPs
7. pregnancy
8. polycythemia
9. thrombocytosis
10. myleoproliferative disorder
11. prothrombin gene mutation
DVT: History - Correct Answers -Presence of risk factors should be sought in all
patients
-80% of patients that come in with DVTs have a risk factor
-25% actually have a DVT
-risk of anticoagulation
-risk of not treating
DVT: Risk Factors (9)* - Correct Answers -1. history of Immobilization or prolonged
bedrest
2. prolonged travel
3. recent surgery (ortho, vascular, neuro, hip replacement)
ANSWERS
look at case study example on ppt - Correct Answers -
DVT overview - Correct Answers -Deep vein thrombosis, or DVT, is a blood clot that
forms in a vein deep in the body. Most deep vein clots occur in the lower leg or thigh. If
the vein swells, the condition is called thrombophlebitis. A deep vein thrombosis can
break loose and cause a serious problem in the lung, called a pulmonary embolism.
DVT of lower extremities (2) - Correct Answers -1. distal calf vein thrombosis (remain
confined to deep calf veins)
2. proximal vein thrombosis (involves popliteal, femoral, and iliac veins)
which vein thrombosis is more commonly associated with development of pulmonary
embolism - Correct Answers -proximal vein thrombosis
Distal calf vein thrombosis - Correct Answers --peroneal anterior or posterior tibial veins
-don't involve popliteal vein
-veins below popliteal vein
-much less likely to cause or propagate into pulmonary system
if you don't treat proximal vein thrombosis, the patient will have a ____ % chance of
having a PE and die in sleep - Correct Answers -50%
DVT: What is Virchows Triad - Correct Answers -1. alterations in blood flow (stasis)
2. vascular endothelial injury
3. alterations in the constituents of blood (inherited or acquired hypercoaguable state)
Virchow's Triad: alterations in blood flow (stasis)
-what are the common causes (4) - Correct Answers -1. atrial fibrillation (stagnant and
forms clots, goes through heart and into lungs
2. LV dysfunction (only pumping 15% of blood, blood lays on bottom of heart and forms
clot)
3. bed rest/immobilization/paralysis
4. venous obstruction from tumor/obesity/pregnancy
what are the DDXs of DVT (8) - Correct Answers -1. muscle strain
2. lymphangitis or lymph obstruction
3. venous insufficiency
, 4. Baker's cyst (degenerative changes in popliteal fossa)
5. cellulitis (hardest to differentiate)
6. internal derangement of knee
7. superficial thrombophlebitis
8. drug induced edema (CCB, haloperidine)
What is the Wells Score for DVT - Correct Answers -clinical prediction/pretest
probability of having DVT
-determines what labs/radiological procedures you will do
a low probability Wells score + d-dimer = - Correct Answers -neg predictive value of
99%
Virchow's Triad: Abnormalities of surfaces in the contact with blood
-common causes (7) - Correct Answers -1. vascular injury/trauma
2. heart valve disease
3. atherosclerosis
4. indwelling catheters
5. previous DVT
6. fractures
7. chemical irritation
Virchow's Triad: Abnormalities of clotting components
-common causes (11) - Correct Answers -1. protein c def
2. protein s def
3. antithrombin def
4. factor 5 Leiden
5. antiphospholipid antibody syndrom
6. estrogen/OCPs
7. pregnancy
8. polycythemia
9. thrombocytosis
10. myleoproliferative disorder
11. prothrombin gene mutation
DVT: History - Correct Answers -Presence of risk factors should be sought in all
patients
-80% of patients that come in with DVTs have a risk factor
-25% actually have a DVT
-risk of anticoagulation
-risk of not treating
DVT: Risk Factors (9)* - Correct Answers -1. history of Immobilization or prolonged
bedrest
2. prolonged travel
3. recent surgery (ortho, vascular, neuro, hip replacement)
