ARRT Patient Care 4

Question 1

What is the minimum gauge IV catheter typically required for CT power injection at rates of 3 mL/s or greater?

Accepted Answer

18 gauge

Answer

An 18-gauge or larger catheter is generally recommended for power injection at 3 mL/s or higher to withstand injection pressure safely.

Question 2

A patient with known multiple myeloma is being prepared for contrast CT. The primary concern is:

Accepted Answer

Bence-Jones proteins increasing risk of contrast-induced nephropathy

Answer

Bence-Jones proteins in multiple myeloma patients can combine with contrast media in renal tubules, increasing risk of acute kidney injury.

Question 3

When scanning a pregnant patient with suspected pulmonary embolism, which approach is most appropriate?

Accepted Answer

Perform CT pulmonary angiography after consulting with the clinical team and radiologist

Answer

Untreated PE can be life-threatening; after risk-benefit discussion with the clinical team and radiologist, CT-PA may be the most appropriate diagnostic choice.

Question 4

Which of the following best describes 'breakthrough' contrast reaction?

Accepted Answer

An allergic-like reaction occurring despite pre-medication

Answer

Breakthrough reactions occur in patients who are pre-medicated yet still develop allergic-like contrast reactions, requiring immediate management.

Question 5

A patient presents for CT of the chest and mentions claustrophobia. The most appropriate initial response is:

Accepted Answer

Acknowledge the concern, explain the open gantry design, and assess if additional support is needed

Answer

Acknowledging patient anxiety, explaining that CT has a wide, short gantry, and assessing for further need addresses claustrophobia appropriately before escalating to medication.

(ARRT) American Registry of Radiologic Technologists Computed Tomography Certification Practice Test

(ARRT) American Registry of Radiologic Technologists Computed Tomography Certification Practice Test

ARRT Patient Care 4