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165 practice exam 2

QuestionAnswer
Why do body parts such as blood vessels, intestines and kidneys have low contrast? They tend to be lower in atomic number than other more easily visualized tissues They tend to have less mass density than some other tissues
When stimulated, mc009-1.jpg1 receptors Increase BP, dilate the pupils, and decrease the ability to urinate and defecate
The newer low-osmolality ionic ROCM are considered to be_____ Ratio 3.0 media
Anaphylactoid reactions- Mimic anaphylactic reactions but require no prior exposure to ROCM to sensitize the mast cell Are just as lethal as anaphylaxis
Diatrizoate meglumine and diatrizoate sodium solutions are Generally used when barium sulfate suspension is potentially harmful Are used for oral or rectal administration Preferred over barium sulfate suspension in CT because of less artifact production
Aspiration of barium sulfate can lead to Pneumonitis or nodular granulomas of the lymph node
After ROCM administration a patient demonstrates dehydration. This is most likely attributed to Osmotic diuresis due to excretion of ROCM into the urine
Anaphylaxis- Requires formation of an antigen-antibody complex during a first time exposure to an antigen Is a type I hypersensitivity reaction Usually occurs when IgE is disabled during sensitization of mast cells during a first exposure
Your patient receives atropine via a slow IV push, ________ The patient may experience a further, lethal decrease in heart rate
High doses of epinephrine generally result in Alpha receptor predominance Constriction of arterioles and increased BP
ß1 receptors- Play no apparent role in ROSC May contribute to increasing and sustaining blood pressure, with epinephrine stimulation Increase cardiac output when stimulated at their myocardial site Releases renin hormone from the kidneys
While experiencing cardiac arrest, your patient is given ______, which is the pharmaceutical equivalent of adrenaline Epinephrine
Your patient is to receive an IV fusion of dopamine. This can be delivered via a _____ Controlled Delivery Device
For a normal radiograph to reflect the vascular lumen, blood iodine concentration must be within the range of _____ mg/mL 280-370
Myocardial necrosis is a risk that can occur with ________administration of epinephrine Intracardiac
Although not a provider’s first choice for treatment of cardiac arrest, when a patient begins to experience ___________, the provider administers sodium bicarbonate Severe Metabolic Acidosis
When a patient receives an IV infusion of dopamine they will be monitored for possible signs of Hypertension Cardiac Dysrhythmias Tachycardia Angina Pectoris
To achieve a high iodine concentration, ROCM must Be injected intravascularly at a rate equal to blood flow Be injected intravascularly at a rate greater than blood flow Be injected rapidly to limit early dilutional effects of the cardiovascular system
Iodine molecules are responsible for the silhouette images projected on radiographic film because they Absorb Photons
Osmolality- Controls the distribution and movement of water between body compartments Is the number of milliosmoles/kg of water
Patients at risk for Acute Renal Failure following IV ROCM include all of the following except those with Dehydration Before ROCM
Your patient experiences cardiac arrest. As life saving measures are begun, your patient demonstrates hemodynamically significant bradycardia and abruptly flatlines. The drug that will most likely be given is Atropine
_________ ROCM are supplied in nonsalt forms Low-Osmolality Non Ionic
Adverse effects elicited by ROCM can depend on their Blood/tissue iodine concentration Osmolality Calcium Chelating Ability Immune system-stimulating ability
Your patient expereinces extravasation of sodium bicarbonate. They are now monitored for Tissue Necrosis Cellulitis Ulceration Tissue Sloughing
Intravascular ROCM- Consist of Large Molecules Do not cross cellular membranes well Have poor lipid solubility
Created by: user-2016295
 

 



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