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
What is the recommended method for flushing an arterial sheath during a cardiac catheterization procedure to prevent thromboembolism?
Answer: Continuous pressure-bag flush with heparinized saline at 3 mL/hr
Continuous pressure-bag flushing with heparinized saline at approximately 3 mL/hr maintains sheath patency and prevents thrombus formation around the indwelling device.
During coronary intervention, a guide catheter with deep intubation of the left main is noted. What is the primary risk of this position?
Answer: Ostial dissection or vessel occlusion
Deep intubation of a guide catheter into the left main increases the risk of traumatic ostial dissection, which can cause acute vessel closure and hemodynamic collapse.
An intravascular ultrasound (IVUS) catheter is best used intraproceduarlly to:
Answer: Assess plaque morphology, true lumen dimensions, and stent apposition
IVUS provides cross-sectional imaging of vessel wall architecture, enabling accurate lumen sizing, plaque characterization, and confirmation of complete stent expansion and apposition.
Which embolic protection device works by capturing debris released during carotid artery stenting?
Answer: Distal filter wire placed beyond the lesion
A distal filter wire is deployed beyond the target lesion to capture particulate emboli dislodged during stenting before they can travel to the cerebral circulation.
What is the purpose of a rotational atherectomy (Rotablator) burr in percutaneous coronary intervention?
Answer: To ablate calcified plaque using high-speed diamond-coated burr rotation
The Rotablator uses a diamond-coated burr rotating at 140,000–180,000 RPM to ablate and pulverize calcified coronary plaque into micro-particles small enough to pass through the microcirculation.
When a drug-eluting stent (DES) is deployed, the polymer coating serves primarily to:
Answer: Control the elution rate of antiproliferative drug into the vessel wall
The polymer coating on a DES acts as a reservoir that controls the sustained, time-dependent release of antiproliferative agents (e.g., sirolimus, paclitaxel) to inhibit neointimal hyperplasia.