Arterial Disease and Aneurysms Flashcards
What is the 5 year survival rate of a patient with a >5cm diameter aneurysms and no surgery?
20%
What happens to plaque space after rupture of the fibrous cap?
Fill with blood that can occlude the vessel
Why do you get pain in claudication?
Anaerobic respiration due to hypoxia from stenosis
What pathological process occurs that allows aneurysms to form?
Weakening of elastin
And eventual failure of collagen
What lines the inside of aneurysms?
Thrombus
Reduced femoral pulse indicates occlusion where?
Aortic - iliac region
At what size is it advisible to surgically intervene with aneurysms?
> 5-5.5cm
Why might you not get claudication in tibial/crural disease?
Disease is below branching point for supplying arteries
When do you get ischaemic rest pain?
When perfusion is so poor that anaerobic respiration occurs at rest
What is the ankle pressure required to occlude pulses in patient with rest pain?
>50mmHg at ankle
How are AAA surgically repaired?
Open the dilated aneurysm
Stitch in a dacron tube along the dilated area
Envelope the dacron with aneurysm sack to prevent dacron damaging surrounding tissue
What are the Sx intervention option for claudication?
Angioplasty
Endarterectomy
Bypass
