CIR CIR Equipment Technology & Device Management 2

Question 1

What is the recommended method for flushing an arterial sheath during a cardiac catheterization procedure to prevent thromboembolism?

Accepted Answer

Continuous pressure-bag flush with heparinized saline at 3 mL/hr

Answer

Continuous pressure-bag flushing with heparinized saline at approximately 3 mL/hr maintains sheath patency and prevents thrombus formation around the indwelling device.

Question 2

During coronary intervention, a guide catheter with deep intubation of the left main is noted. What is the primary risk of this position?

Accepted Answer

Ostial dissection or vessel occlusion

Answer

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.

Question 3

An intravascular ultrasound (IVUS) catheter is best used intraproceduarlly to:

Accepted Answer

Assess plaque morphology, true lumen dimensions, and stent apposition

Answer

IVUS provides cross-sectional imaging of vessel wall architecture, enabling accurate lumen sizing, plaque characterization, and confirmation of complete stent expansion and apposition.

Question 4

Which embolic protection device works by capturing debris released during carotid artery stenting?

Accepted Answer

Distal filter wire placed beyond the lesion

Answer

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.

Question 5

What is the purpose of a rotational atherectomy (Rotablator) burr in percutaneous coronary intervention?

Accepted Answer

To ablate calcified plaque using high-speed diamond-coated burr rotation

Answer

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.

CIR - Cardiac Interventional Radiology Practice Test

CIR - Cardiac Interventional Radiology Practice Test

CIR CIR Equipment Technology & Device Management 2