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DVT423- TH2

USIDMS Lower Extremity Arterial

What is the main factor in arterial hemodynamics? Fluid energy gradient reflected as a pressure gradient
What is the third component in a normal peripheral arterial waveform stand for? Forward flow- Late diastole or rebounding in artery from elasticity
Are viscosity and hematocrit directly or indirectly proportional? Directly
How does the density effect turbulence? Increase density ----> Increase Turbulance
Hemodynamically significant stenosis starts at what percent? >50%
Stenosis Profile Dampened Velocities- proximal Increased Velocities- at Spectral broadening (turbulence)- distal
What happens to resistance as the length of a vessel increases? Resistance increases
What is the first branch off of the popliteal artery? Anterior Tibial Artery (ATA)
What is the most common site for arterial disease? Distal Superficial Femoral Artery (SFA)
Where is the obstruction in an artery if the patient has pain in their calf while walking? Directly above pain- either popliteal a or SFA
Symptom for moderate PVD Claudication
Symptom for severe PVD Ischemic rest pain
Most common arterial disease Atherosclerosis
What type of disease process makes blue toe syndrome? Embolism
An aneurysm is defined by what guidelines? >3cm or 1.5x greater than the normal measurement
What may cause dampened waveforms? Congestive Heart Failure (CHF)
What is the entrapment of the left renal vein called? Nutcracker syndrome
Is continuous wave qualitative or quantitative? Qualitative
What happens to the pressures in arteries with calcification? Falsely elevated pressures
How much wider should the bladder of the pressure cuff be compared to the diameter of the limb? 20% wider
How many mmHg is considered to be a significant drop when ABI or abnormal? 30 mmHg
ABI > or = 0.5 can represent _______ Single level disease
ABI < 0.5 suggests _______ Multiple level disease
A horizontal difference of 30mmHg between two legs suggest _______? Obstruction at or above the level in the limb with lower pressure
Toe pressures of < or = _____mmHg will lead to nonhealing foot/toe ulcers 30mmHg
What is another option for SPEX if patient can not walk, has pulmonary problems, or heart problems? Reactive Hyperemia
What is the reflected wave also called? Dicrotic notch
A good PVR waveform may accompany a poor ABI, why? Collaterals
Created by: thollander