Lower Extremity Flashcards
What is Leriche syndrome?
Triad: absent femoral pulses, intermittent claudication and impotence
Name 4 conditions that mimic PAD?
Spinal stenosis, OA, venous claudication, radiculopathy
What size would be an indication to repair a femoral aneurysm
Normal - 1 cm, indication for repair 3.5 cm (or 2.5 cm if intraluminal thrombus)
What conditions are associated with true femoral pseudoaneurysms?
- Old
- Male
- Smoking
- NTN
- Wegners granulamotosis
- Parkes-Weber
- Bechets
How do most femoral aneurysms present?
65% with claudication/CLI from embolic symptoms
What is the prefered conduit for interposition graft of femoral pseudoaneurysms?
Prosthetic - dacron or PTFE

Should you resect the aneurysm sac during femoral aneurysm repair?
Usually not - may injure surrounding structures
How can you obtain proximal control for large femoral aneurysms (2 ways)?
Proximal balloon occlusion from contralateral femoral.
Retroperitoneal exposure of suprainguinal external iliac artery
What are 3 contraindications to ultrasound guided compression?
Infection, ischemic skin changes, puncture above inguinal ligament,
What does thrombin do?
Converts fibrinogen to fibrin for direct clot formation. “Short circuits” coag cascade and therefore still works with heparin/warfarin on board
How much thrombin is usually required to induce thrombosis?
1000 units or 1 mL (comes in 1000 IU/mL)
What are 3 contraindications to bovine thrombin?
Allergy, infection, pregnancy
What are indications for an open surgical repair of femoral pseudoaneurysm?
- Contraindication to thrombin
- Failure of thrombin
- Skin ischemia
- AV fistulas
What is the embryologic origin of persistent sciatic artery?
Umbilical artery - should regress at 3 months gestational age
What percentage of popliteal aneurysms are bilateral?
50%
What percentage of popliteal aneurysm patients have an AAA?
30-50%
What percentage of AAA have coexisting popliteal aneurysms?
15%
What size threshold for repairing popliteal aneurysms?
> 3 cm or > 2 cm if ++ thrombus, symptomatic any size
What are 4 contraindications to endovascular popliteal aneurysm repair?
- Insufficient landing zone < 2cm proximal and distal
- Not able to take antiplt
- Gardner/carpenter/jobs with a lot of knee flexion
- Extremely tortuous
How long should patients be on dual antiplatelet after popliteal stenting?
4-6 weeks
How much should you oversize a popliteal viabhan for aneurysm repair?
10-15%
Which approach should you use to repair a large popliteal aneurysm that compresses adjacent nerves?
Posterior, unless very proximal
When should you treat an acutely ischemic limb secondary to popliteal aneurysm with thrombolysis?
Insufficient outflow vessels for bypass. Limb must be able to withstand 12-18h of ischemia
What is the objective criteria for Rutherford 0, category 0 CLI?
Normal treadmill or reactive hyperemia test


























































































