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DOH Cardiac-Interventional Radiography (DOH-CI) Practice Tests & Test Prep by Exam Edge - Topics


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DOH Cardiac-Interventional Radiography Exam Blueprint

Understanding the exact breakdown of the DOH Cardiac-Interventional Radiography test will help you know what to expect and how to most effectively prepare. The DOH Cardiac-Interventional Radiography has multiple-choice questions The exam will be broken down into the sections below:

DOH Cardiac-Interventional Radiography Exam Blueprint
Domain Name % Number of
Questions
Equipment and Instrumentation 21% 21
Patient Care 24% 24
Cardiac-Interventional Procedures 55% 55

DOH Cardiac-Interventional Radiography - Exam Topics Sample Questions

Of the following, which is considered an intermediate or severe reaction of contrast injection?

Correct Answer:
angioneurotic oedema.


among the reactions listed, angioneurotic edema is considered an intermediate to severe reaction to contrast injection. angioneurotic edema, also known as angioedema, involves the rapid swelling of the deeper layers of the skin and subcutaneous tissues. this condition can be life-threatening if it affects the throat, tongue, or lungs, leading to obstruction of the airway and difficulty in breathing.

the treatment approach for angioneurotic edema is immediate and intensive due to its potential severity. monitoring the patient’s vital signs such as pulse, blood pressure (bp), oxygen saturation, and electrocardiogram (ecg) is crucial to assess the severity of the reaction and guide treatment. administration of 100% oxygen helps to ensure adequate oxygenation, especially important if there is airway compromise.

the administration of adrenaline (epinephrine) subcutaneously, typically at doses of 0.3 - 0.5 ml of a 1:1000 solution, is essential as it helps to reduce swelling, stimulate the heart, and open up the airways. additionally, the use of antihistamines such as chlorphenamine (chlorpheniramine) 20 mg by slow intravenous injection can help control the histamine-mediated allergic response, further reducing symptoms.

due to the potential for rapid progression of angioneurotic edema, especially involving the airways, an anesthetist or other trained medical professional should assess the patient’s airway immediately. ensuring an open airway and preventing obstruction is a critical step in managing severe allergic reactions to contrast media.

in summary, angioneurotic edema is a significant and potentially life-threatening allergic reaction to contrast injection, requiring immediate medical intervention and careful monitoring. the quick administration of oxygen, adrenaline, and antihistamines, along with expert assessment of the airway, are key components of effectively managing this severe reaction.

When using a non-ionic contrast, which of the following reactions is LEAST likely to occur?

Correct Answer:
sialadenitis.


when using contrast media in medical imaging, different types of reactions can occur, varying in frequency and severity. these reactions can be influenced by the type of contrast used - ionic or non-ionic. non-ionic contrast agents are generally associated with a lower incidence of adverse reactions compared to ionic contrast agents. this is primarily because non-ionic contrast agents are less chemotoxic and have lower osmolality compared to their ionic counterparts.

among the reactions listed - delayed rash, nausea, urticaria, and sialadenitis - understanding which is least likely to occur with non-ionic contrast requires a grasp of the typical reactions associated with these agents. delayed rashes and urticaria (hives) are examples of allergic-like reactions that could potentially occur with any contrast agent, though they are generally less common with non-ionic contrast due to its reduced ability to trigger histamine release.

nausea is a relatively common non-specific reaction that can occur with either type of contrast agent, often related to the procedure itself or the patient’s anxiety and stress levels, rather than the chemical properties of the contrast media.

sialadenitis, an inflammation of the salivary glands, is a very rare complication associated with contrast media usage. it is much less commonly reported in comparison to other contrast-related reactions. the exact mechanism by which contrast media induces sialadenitis is not well understood, but it is considered an idiosyncratic reaction, meaning it is unpredictable and not dose-dependent.

therefore, when considering the reactions listed in the context of non-ionic contrast media usage, sialadenitis is the least likely to occur. this rarity makes it a notable point of interest for clinicians and radiologists monitoring for adverse effects post-procedure in patients administered with contrast. meanwhile, other reactions like nausea, delayed rashes, and urticaria, though also relatively rare with non-ionic contrasts, occur with somewhat greater frequency than sialadenitis.