CIR Equipment Technology & Device Management Flashcards
6 cards from real CIR practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CIR Equipment Technology & Device Management flashcards as text
Which pressure waveform finding indicates that a guide catheter is damping the coronary ostium during catheterization?
Answer: Loss of dicrotic notch with reduced pulse pressure on arterial waveform
Catheter-induced ostial damping produces a ventricularized or blunted arterial waveform with reduced pulse pressure and loss of the dicrotic notch, signaling inadequate coronary perfusion.
A closure device using a collagen plug mechanism (e.g., Angioseal) should NOT be used in patients who:
Answer: Have had a prior ipsilateral femoral closure device within 90 days
Reusing a collagen-based closure device in the same femoral artery within 90 days risks entrapment of the prior collagen plug anchor, leading to arterial occlusion or vascular injury.
Fractional Flow Reserve (FFR) measurement requires pharmacologic hyperemia because:
Answer: Maximal vasodilation eliminates microvascular resistance, isolating the stenosis as the sole flow-limiting variable
Adenosine-induced maximal hyperemia minimizes microvascular resistance so that the measured pressure gradient across the stenosis reflects only the epicardial lesion's hemodynamic significance.
Which characteristic of a bioresorbable vascular scaffold (BVS) differentiates it most significantly from a metallic DES?
Answer: It is gradually absorbed by the vessel wall over 2–3 years, leaving no permanent implant
BVS platforms are designed to provide temporary scaffolding and drug delivery, then dissolve through bioresorption over approximately 2–3 years, restoring vessel vasomotion and eliminating a permanent foreign body.
During coronary intervention, what does the term 'stent jail' refer to?
Answer: Caging of a side branch ostium by stent struts crossing it during main vessel stenting
Stent jail occurs when stent struts are deployed across a side branch ostium, restricting access; a guidewire must be re-crossed through the struts to treat the jailed branch if needed.
What is the primary advantage of using a radial artery access site over femoral access for cardiac catheterization?
Answer: Significantly lower major vascular access-site bleeding complications
Radial access reduces major vascular bleeding complications and allows earlier ambulation compared to femoral access because the radial artery is superficial and easily compressible.