Patho lecture 5
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Patho lecture 5
BloodVessels Obstructions are
Stationary blood clot formed with a vessel or a chamber of the heart
Inflammation may stiumualte
Thrombus in inflamed vein
Arterial thrombi can result in
Collection of material that forms a clot within a blood vessel
What is the most common type of Embolus??
A traveling clot which will cause new site of vessel obstructio
Other causes of emboli
Air, fat, amniotic fluid, bacterial mass
Sudden constriction of arterial smooth muscle that results in obstructed blood flow
Vasculitis, phlebitis, arteritis (autoimmune inflammation)(can cause vessel to occlude)
Trauma, tight casts or dressings, compartment syndrome, edema, etc.
Blood Vessels with Structural Alterations
Arteriosclerosis and Atherosclerosis
Valvular Incompetence can happen in
Valvular Incompetence In superficial veins, results in
Valvular Incompetence in deep veins, results in
chronic venous insufficiency
Atherosclerosis is a specific type of
arteriosclerosis affecting medium- and large-size arteries
What happens whenAtherosclerosis narrows the lumina of the arteries ??
reducing blood flow to tissues and end-organs
Localized dilation of an arterial wall (a weakened area in the artery)
Abnormal communications between arteries and veins, no capillary bed
First sign of Arteriovenous Fistulas is
A severe headache
What malformation is the Most common and most serious type in Arteriovenous Fistulas??
Obstructed lymph flow causes
Formation of atherosclerotic plaques seems to begin with
damage to the endothelial surface of the vessel
Atherosclerosis is the underlying pathologic condition for much of
hypertension, renal disease, cardiac disease, peripheral artery disease, and stroke
What is the biggest complaint from people with Atherosclerosis ??
A rare inflammatory condition affecting small- and medium-sized arteries and veins of the upper and lower extremities
An extreme vasoconstriction producing cessation of blood flow to fingers and toes
Localized arterial dilations, with risk of rupture
What are the underlying causes for Aneurysms??
may be atherosclerosis or weakness of vessel wall, caused by infection, inflammation, or injury
Acute Arterial Occlusion
Emergency situation, possibly caused by thrombus or embolism or external mechanical compression
Produces such a profound ischemia that the limb may become gangrenous and sepsis may result
Acute arterial obstruction is accompanied by the classic manifestations known as the six P’s which are??
pallor, paresthesia, paralysis, pain, pulselessness, and polar (cold to touch)