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What is the name of the test that bounces Hi Freq sound waves off blood vessels and heart to form a picture?
Intra Vascular Ultrasound (IVUS)
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What size sheath and guide catheter is used for IVUS?
6-8 French
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During IVUS, what type of guide wire is passed to the distal part of the artery being examined?
Angioplasty Guidewire (0.014)
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List six things that should appear on an IVUS image.
- Adventia
- Media
- Plaque
- Overall Available Lumen
- Wire Shadow
- IVUS Catheter
- Stent Struts
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What is the size of an IVUS catheter?
- 2.9-3.5 French
- Diameter (0.957-1.16mm)
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At the conclusion of an IVUS test, what is an angiography study being used to check for?
Disruption or injury due to intravascular equipment on the coronary artery in question.
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How is IVUS used for Clinical Research?
Restenosis prevention, proper stent placement, and proper stent expansion.
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One line blood flow, forward views of CTO, and HD imaging of better stable/unstable plaques are examples of the ________ of IVUS.
Future Technological Developments
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What does FFR stand for?
Fractional Flow Reserve
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Define FFR
Translesional physiolocgical equipment used to determine if treatment is required
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What wire is similar to a standard 0.014 angioplasty guidewire, but has a transducer mounted on from it's tip?
Pressure Wire
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Where is the transducer mounted on a pressure wire
3cm from the tip
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What are the advantages of FFR?
- Absolute value of 1.0
- Not affected by hemodynamic perturbation
- Specific for epicardial coronary disease
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What size guide catheter would a doctor normally choose for FFR?
5 or 6 French
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What medications are normally administered preprocedure of FFR?
Heparin and IC NTG
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If the doctor deems it neccesary, what can the pressure wire also be used for?
Intervention
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What medication is adminstered to obtain maximum hyperemia in a FFR procedure?
- Adenosine
- (140 mcg/kg/min drip)
- (20-30 mcg/kg/min IC)
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What type of stents are most commonly used in Peripherial vessels?
Self expanding stents
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What are the self expanding stents made of?
Nitinol
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List the periperhal vascular in order of blood flow.
- Carotid Arteries
- Subclavian
- Renals
- Abdominal Aorta
- Iliac
- Femoral
- Popliteal (knees)
- Anterior/Posterior Tibial
- Dorsalies Pedis (top of foot)
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How do you determine FFR ratio?
- Distal / Proximal
- ex: 80/120 = 2/3 = 66%
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If FFR ratio is lower than _____% then a treatment (balloon or stent) will be needed.
75%
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