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DVT423- TH2
USIDMS Lower Extremity Arterial
| Question | Answer |
|---|---|
| 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
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