what is an aneurysm?? an aneurysm is a localized, permanent dilatation of an artery greater than 1.5...
TRANSCRIPT
Aneurysms
What is an aneurysm??An aneurysm is a localized, permanent
dilatation of an artery greater than 1.5 times
its normal diameter.
Aneurysms occur all over the body and in any
vessels, including the aorta, and the iliac,
femoral, popliteal, subclavian, axillary and
carotid arteries.
Aneurysms:Classification:
Wall True aneurysms False aneurysms
Morphology Fusiform Saccular Dissecting
Etiology Atherosclerosis Mycotic traumatic
Clinical presentation:Asymtomatic
Symptomatic
Pressure on nearby structures
Aneurysm thrombosis leading to ischemia
Aneurysm embolization
Aneurysm rupture.
O/E: palpable, expansile mass, with or
without thrill
Pseudoaneurysm of popletial
artery
Differential diagnosis:
1. Cyst or abscess overlying an artery
2. Mass overlying an artery
3. Tortuous artery
Investigatons:1. Ultrasonography
2. Duplex ultrasound
3. Angiography
4. CT and CT angiography
5. MRA
Ultrasound & Duplex Ultrasound:
Angiography:
CT angiography:
Treatment:1. Aneurysm excision with graft interposition
2. Aneurysm repair
3. Aneurysm excision with resection of
supplying tissue
4. Aneurysm excision without arterial
reconstruction
5. Endovascular aneurysm repair
Arterio-Venous Fistula
What is an AV fistula??Abnormal direct communication between the
arterial and venous system that bypasses the
capillary bed.
Etiology:Causes of AV fistulas:
1. Congenital (arteriovenous malformations or hemangiomas
2. Acquired which may beA. TraumaticB. Iatragenic.C. Neoplastic.D. SpontaneousE. Surgically created
Clinical Presentation:Congenital AV malformation:
1. Cosmetic effect
2. Pressure effect on nearby structures
3. Bleeding and ulceration
4. Thrombosis or thrombophlebitis
Benign AV malformations
Complex AV malformations
Acquired AV fistulas1. Distal limb ischemia leading to ischemic
ulcers and gangrene.2. Dilated tortuous veins in the area (varicose
veins)3. Limb edema with pain and discomfort due to
the chronic venous hypertension4. Increased venous return to the heart leading
to increase work load on the heart and eventually heart failure
5. Aneurismal dilatation leading to what is called an "aneurismal fistula"
6. A chronic fistula in a limb of a growing child may affect the growth of that limb.
Treatment:AV malformations
Staged operationsPercutaneous embolization, Multidisciplinary teams
Acquired AV fistulas:Percutaneous embolization of the fistula, Excision with or without vascular
reconstruction, or 4 limb ligation of the fistula
Thank You