- A 39-year-old client is scheduled for a CT urogram with iodinated contrast (iopromide) to evaluate hematuria. The client reports a previous contrast reaction (facial swelling and shortness of breath) and currently takes propranolol for migraine prevention; vital signs: BP 110/68 mm Hg, HR 58/min, RR 16/min; serum creatinine 0.8 mg/dL. Which precaution should the nurse take PRIOR to administering contrast?
Answer: Confirm the radiology team is aware the client is taking a beta-blocker, which can complicate treatment of anaphylaxis
This question tests clinical judgment regarding contrast allergy precautions for a client taking beta-blockers with a history of severe contrast reaction. The priority concern is recognizing that beta-blockers can interfere with the treatment of anaphylaxis by blocking the effects of epinephrine. Confirming the radiology team is aware the client is taking a beta-blocker is crucial because propranolol can make anaphylaxis more severe and resistant to standard treatment, requiring higher doses of epinephrine or alternative medications like glucagon. Encouraging high-protein meals immediately before (B) could increase aspiration risk; administering medications without orders (C) violates scope of practice; removing metal objects (D) is relevant for MRI, not CT. The decision-making principle is that beta-blockers create a special risk in patients with contrast allergies by potentially worsening anaphylaxis and complicating its treatment. A transferable strategy is to always communicate beta-blocker use to the entire care team when clients with contrast allergies undergo procedures, ensuring appropriate emergency medications and doses are readily available.
- A 58-year-old client with hypertension and type 2 diabetes is scheduled for a computed tomography (CT) scan of the abdomen with iodinated contrast (iohexol) to evaluate suspected appendicitis. The client reports hives after eating shellfish and is taking metformin and lisinopril; vital signs are blood pressure 138/82 mm Hg, heart rate 84/min, oxygen saturation 98% on room air; creatinine 0.9 mg/dL. Which precaution should the nurse take PRIOR to administering contrast?
Answer: Hold metformin on the day of the scan and for 48 hours after contrast, and verify renal function per protocol
This question tests clinical judgment regarding contrast allergy precautions in clients undergoing CT scans with iodinated contrast. The priority concern is preventing metformin-induced lactic acidosis and assessing for potential contrast allergy risks. Holding metformin on the day of the scan and for 48 hours after, while verifying renal function, ensures client safety by mitigating the risk of contrast-induced nephropathy and aligns with best practices for diabetic clients on metformin. Option B is incorrect because shellfish allergy does not contraindicate iodinated contrast; option C is unsafe as medications require a provider order; option D is wrong as extra fluids prevent dehydration, not constipation. The decision-making principle involves screening for medication interactions like metformin with contrast and confirming normal renal function before proceeding. Protocols often require withholding metformin to avoid complications if renal impairment occurs post-contrast. A transferable strategy is to always review current medications and allergies, consulting protocols for premedication or holding drugs as needed to manage contrast risks safely.
- A 72-year-old client with peripheral arterial disease is scheduled for lower-extremity angiography using iodinated contrast (iopamidol) for worsening claudication. The client has a history of anaphylaxis to iodinated contrast during a prior CT and takes metoprolol and aspirin; vital signs are blood pressure 142/86 mm Hg, heart rate 62/min; creatinine 1.1 mg/dL. Which precaution should the nurse take PRIOR to administering contrast?
Answer: Ensure the prescribed premedication protocol is completed and emergency airway/resuscitation equipment is immediately available
A documented history of anaphylaxis to iodinated contrast makes this a high-risk administration. The nurse must prepare for a possible breakthrough reaction and be ready to rescue. Completing the prescribed premedication protocol and having emergency airway/resuscitation equipment immediately available addresses both goals. Delegating the assessment of the prior contrast reaction to unlicensed assistive personnel is unsafe because interpreting that history and determining risk is an RN responsibility. Proceeding without premedication because the ordered agent is a low-osmolar agent is also unsafe: low-osmolar agents reduce the risk of a reaction but do not eliminate it, especially in a client who has already had anaphylaxis. Encouraging a high-fat meal before the procedure is not a precaution against contrast allergy and may conflict with pre-procedure fasting requirements. The correct precaution is therefore to confirm the premedication protocol is complete and keep emergency airway and resuscitation equipment available.
- A 50-year-old client with a history of contrast allergy (hives and shortness of breath) is scheduled for CT angiography with iodinated contrast (iohexol) to evaluate suspected aortic dissection. Current medications include propranolol; vital signs are blood pressure 98/60 mm Hg, heart rate 54/min, oxygen saturation 97% on room air; creatinine 1.0 mg/dL. Which precaution should the nurse take PRIOR to administering contrast?
Answer: Notify the provider that the client takes a beta-blocker and has a prior severe contrast reaction; ensure a high-acuity monitoring plan and emergency medications are available
A prior contrast reaction with hives and shortness of breath marks this client as high risk, and taking a beta-blocker compounds that risk because beta blockade can blunt the response to epinephrine and make anaphylaxis harder to reverse. Notifying the provider about both the beta-blocker and the prior severe reaction and ensuring a high-acuity monitoring plan with emergency medications available is correct, because it puts the decision in the prescriber's hands and stages the resources needed if a refractory reaction occurs. Proceeding on the belief that beta-blockers prevent allergic reactions inverts the pharmacology; they complicate treatment rather than provide protection. Giving the client an oral antihistamine from home medications without verifying orders administers a drug with no prescription, which is outside the nurse's authority regardless of how reasonable the drug choice seems. Having the client drink barium is an unrelated oral gastrointestinal agent that does nothing to reduce the risk of an intravenous iodinated contrast reaction. When a known allergy risk collides with a medication that impairs rescue, escalate to the provider and build the monitoring plan before the drug is given, and never administer anything without an order.
- A 54-year-old client is scheduled for CT of the abdomen with iodinated contrast (iohexol) to evaluate suspected abscess. The client has a known allergy to iodinated contrast (hives) and is currently taking metformin; vital signs are blood pressure 136/84 mm Hg; creatinine 1.1 mg/dL. Which precaution should the nurse take PRIOR to administering contrast?
Answer: Verify that the provider has been notified of the contrast allergy and that an allergy protocol (premedication or alternative imaging) is in place before administering contrast
This question tests clinical judgment regarding contrast allergy precautions for abdominal CT in clients with known allergies. The priority concern is implementing protocols to prevent reactions like hives. Verifying provider notification and allergy plans ensures safety by confirming precautions and follows best practices. Option B is unsafe as monitoring is needed; option C is inappropriate for testing; option D is irrelevant for ambulation. The decision-making principle involves confirming management strategies like premedication. This reduces risks. A transferable strategy is to ensure documented allergy protocols are active before any contrast administration.
- A 52-year-old client with a history of mild chronic kidney disease is scheduled for an MRI of the liver with gadolinium contrast (gadoterate meglumine) to evaluate a mass seen on ultrasound. The client has allergies to sulfonamides (hives) and takes losartan; vital signs are blood pressure 124/76 mm Hg; eGFR 58 mL/min/1.73 m². Which precaution should the nurse take PRIOR to administering contrast?
Answer: Verify the most recent renal function results and screen for any prior reaction to gadolinium-based contrast
This question tests clinical judgment regarding contrast allergy precautions for MRI with gadolinium in clients with mild CKD. The priority concern is preventing NSF and assessing for prior gadolinium reactions. Verifying recent renal function and screening for past reactions ensures safety by identifying risks and follows guidelines for gadolinium use in renal impairment. Option B is incorrect as protamine is for heparin reversal; option C is wrong because losartan does not need holding for allergy risk; option D is irrelevant for topical anesthetics. The decision-making principle is to evaluate eGFR and allergy history before gadolinium to minimize complications. Protocols emphasize caution if eGFR is borderline. A transferable strategy is to routinely screen for renal function and contrast history, consulting providers for alternatives in at-risk clients.
- A 72-year-old client with chronic kidney disease stage 4 is scheduled for an MRI brain with gadolinium-based contrast (gadobutrol) to evaluate a new-onset seizure. Current medications include insulin glargine and furosemide; labs: serum creatinine 2.6 mg/dL, estimated glomerular filtration rate (eGFR) 22 mL/min/1.73 m²; vital signs: BP 142/84 mm Hg, HR 78/min. Which client condition REQUIRES immediate intervention before contrast administration?
Answer: eGFR of 22 mL/min/1.73 m² prior to gadolinium administration
This question tests clinical judgment regarding contrast allergy precautions for a client with severe chronic kidney disease receiving gadolinium-based contrast. The priority concern is preventing nephrogenic systemic fibrosis (NSF), a rare but serious condition that can occur when gadolinium is administered to patients with severe renal impairment. An eGFR of 22 mL/min/1.73 m² requires immediate intervention because gadolinium administration is contraindicated in patients with eGFR <30 mL/min/1.73 m² due to the high risk of NSF, which can cause severe fibrosis of skin and internal organs. While elevated blood pressure (A) may need management, it doesn't contraindicate contrast; furosemide use (C) and seizure history (D) don't affect gadolinium safety. The decision-making principle is that severe renal impairment (eGFR <30) is an absolute contraindication for gadolinium-based contrast agents due to NSF risk. A transferable strategy is to always verify current renal function before any contrast administration, with special attention to gadolinium restrictions in patients with eGFR <30 mL/min/1.73 m².
- A 61-year-old client is scheduled for CT angiography of the head and neck with iodinated contrast (ioversol) to evaluate suspected carotid stenosis. The client reports a prior severe contrast reaction (hypotension and wheezing) and states, "I forgot to take my prescribed premedications today"; current medications include clopidogrel and atorvastatin; vital signs: BP 124/72 mm Hg, HR 76/min. Which client condition REQUIRES immediate intervention before contrast administration?
Answer: Failure to take the prescribed contrast premedication regimen before arrival
This question tests clinical judgment regarding the critical importance of contrast premedication compliance in high-risk patients. The priority concern is preventing a severe allergic reaction in a client with documented prior severe contrast reaction. Failure to take the prescribed contrast premedication regimen requires immediate intervention because premedication significantly reduces the risk of repeat reactions, and proceeding without it places the client at high risk for anaphylaxis. Clopidogrel use (A) doesn't affect contrast administration; normal heart rate (C) and the indication for the test (D) don't require intervention. The decision-making principle is that prescribed premedication protocols must be completed before contrast administration in clients with prior severe reactions, as skipping premedication dramatically increases the risk of life-threatening reactions. A transferable strategy is to always verify premedication compliance before transport in clients with contrast allergies, and to delay procedures if premedication hasn't been administered according to protocol, as this is a critical safety requirement.
- A 59-year-old client is scheduled for an MRI with gadolinium contrast (gadoteridol) to evaluate a suspected acoustic neuroma. The client reports chronic kidney disease and takes hydrochlorothiazide; vital signs are blood pressure 140/86 mm Hg; eGFR is not yet resulted today (last month eGFR 38 mL/min/1.73 m²). Which client condition REQUIRES immediate intervention before contrast administration?
Answer: No eGFR result available today prior to gadolinium administration in a client with known chronic kidney disease
This question tests clinical judgment regarding contrast allergy precautions for MRI with gadolinium in CKD clients. The priority concern is ensuring current renal function to prevent NSF. No available eGFR today requires intervention as last month's value indicates risk, aligning with guidelines for recent testing. Option B is acceptable for hydrochlorothiazide; option C is not urgent for blood pressure; option D is the indication, not a concern. The decision-making principle is to obtain up-to-date eGFR before gadolinium in renal disease. This assesses NSF risk accurately. A transferable strategy is to insist on current labs for contrast decisions, discussing delays or alternatives if needed.
- A 61-year-old client is scheduled for MRI with gadolinium contrast (gadoterate meglumine) to evaluate multiple sclerosis progression. The client reports a history of kidney disease; medications include ibuprofen as needed; vital signs are blood pressure 122/74 mm Hg; eGFR 29 mL/min/1.73 m². Which precaution should the nurse take PRIOR to administering contrast?
Answer: Hold gadolinium and notify the provider of reduced eGFR to determine if contrast should be avoided or modified
Gadolinium-based contrast in advanced kidney disease carries a risk of nephrogenic systemic fibrosis, and an eGFR of 29 mL/min/1.73 m squared falls below the commonly used threshold of 30 that triggers reassessment before the agent is given. Holding the gadolinium and notifying the provider of the reduced eGFR so the plan can be changed, whether to a non-contrast study, a modified dose, or a different agent, is correct because the nurse's authority here is to recognize the risk and escalate it. Administering the gadolinium as ordered on the belief that MRI contrast does not affect clients with kidney disease is factually wrong and is precisely the error being tested. Giving acetylcysteine without an order is practicing outside scope, and acetylcysteine targets iodinated contrast nephropathy rather than gadolinium or an allergic reaction. Asking the client to remove all metal objects is a legitimate MRI safety measure for the magnetic field, but it has nothing to do with contrast reactions and does not address the renal risk. When a lab value crosses a known safety threshold for an ordered agent, hold the agent and notify the provider; the nurse stops and escalates rather than substituting a drug.
- A 73-year-old client is scheduled for CT of the chest with iodinated contrast (iopamidol) to evaluate a lung mass. The client reports a prior contrast reaction of "warm flushing and a metallic taste" with no rash or breathing problems; medications include tiotropium inhaler; vital signs are blood pressure 130/76 mm Hg, heart rate 74/min; creatinine 0.9 mg/dL. The nurse should VERIFY which information with the client before the procedure?
Answer: Whether the prior symptoms were limited to expected sensations versus signs of an allergic reaction (hives, swelling, wheeze)
This item rewards assessing before acting: the nurse must first determine whether the reported prior event was a true hypersensitivity reaction or an expected physiologic response, because that distinction drives whether premedication and heightened precautions are needed at all. Verifying whether the prior symptoms were limited to expected sensations or included allergic signs such as hives, swelling, or wheezing is correct, since warmth, flushing, and a metallic taste are common physiologic effects of iodinated contrast rather than allergy, and clarifying this prevents both unnecessary premedication and missed risk. Asking about motion sickness targets a nausea history that does not alter contrast allergy risk or the plan of care. Asking about a tetanus booster is unrelated to contrast administration entirely. Asking about reactions to bananas or avocados screens for latex cross-reactivity, which is a real concern in other contexts but has no bearing on iodinated contrast risk and would mislead the risk assessment. Clarify what a reported reaction actually was before classifying a client as allergic, because expected physiologic effects and true hypersensitivity call for very different precautions.
- A 68-year-old client with multiple medication allergies (penicillin—anaphylaxis; sulfonamides—hives) is scheduled for cerebral angiography using iodinated contrast (ioversol) after a transient ischemic attack. The client reports a prior mild contrast reaction (itching only) and is taking clopidogrel and amlodipine; vital signs are blood pressure 136/84 mm Hg, heart rate 76/min; creatinine 1.0 mg/dL. Which precaution should the nurse take PRIOR to administering contrast?
Answer: Clarify the type and severity of the previous contrast reaction and verify whether premedication is ordered per protocol
The correct action is to clarify the type and severity of the earlier contrast reaction and verify whether premedication is ordered per protocol. The client's prior reaction was mild (itching only), but the nurse must confirm the protocol order before giving ioversol; the penicillin and sulfonamide allergies do not reliably predict an iodinated contrast reaction, and creatinine 1.0 mg/dL is normal. Administering epinephrine prophylactically is not a standard contrast precaution; it treats active anaphylaxis and can cause tachycardia and hypertension in a client with cerebrovascular disease. Holding clopidogrel for 7 days confuses antiplatelet management with allergy risk; clopidogrel does not increase anaphylaxis risk, and stopping it unnecessarily raises thrombotic risk. Trendelenburg positioning during injection is not a recognized contrast-allergy precaution and does not prevent a contrast reaction. Thus the nurse should gather the missing information and check for an ordered premedication protocol before intervening.
- A 46-year-old client is scheduled for a CT pulmonary angiogram with iodinated contrast (iopamidol) to evaluate possible pulmonary embolism. History includes asthma and a shellfish allergy (urticaria after shrimp); current medications include albuterol inhaler and montelukast; vital signs: BP 128/76 mm Hg, HR 92/min, RR 18/min, SpO2 96% on room air. The nurse should VERIFY which information with the client before the procedure?
Answer: Whether the client has had a prior reaction to iodinated contrast media during a previous imaging study
This question tests clinical judgment regarding contrast allergy precautions for a client with asthma and shellfish allergy scheduled for CT with iodinated contrast. The priority concern is identifying clients at risk for contrast reactions to ensure appropriate precautions are taken. Verifying whether the client has had a prior reaction to iodinated contrast media is the most critical information because previous contrast reactions are the strongest predictor of future reactions, and this history guides premedication decisions. While shellfish allergy was historically thought to increase contrast reaction risk, current evidence shows no correlation; NPO status after the procedure (B) is not standard practice; latex allergy (C) is relevant for IV supplies but not contrast reactions; acetaminophen use (D) doesn't affect contrast administration. The decision-making principle is that prior contrast reactions, not shellfish allergies or other unrelated allergies, determine the need for premedication protocols. A transferable strategy is to always directly ask about previous contrast reactions rather than relying on food allergies as predictors, as this ensures appropriate risk stratification and preventive measures.
- A 45-year-old client with asthma is scheduled for a CT pulmonary angiogram with iodinated contrast (iodixanol) to evaluate suspected pulmonary embolism. The client reports a prior severe reaction to contrast with wheezing and facial swelling; current medications include albuterol inhaler and prednisone 10 mg daily; vital signs are blood pressure 118/70 mm Hg, heart rate 96/min, respiratory rate 18/min, oxygen saturation 95% on room air. The nurse should VERIFY which information with the client before the procedure?
Answer: The exact symptoms and timing of the prior contrast reaction and whether epinephrine was required
This question tests clinical judgment regarding contrast allergy precautions by verifying details of prior reactions before CT pulmonary angiography. The priority concern is assessing the severity of past reactions to guide premedication needs. Verifying exact symptoms, timing, and epinephrine use ensures safety by determining reaction severity and aligns with best practices for risk stratification. Option B is irrelevant as latex allergy does not relate to contrast; option C is unimportant for scheduling preferences; option D is unrelated to spicy foods. The decision-making principle is to clarify reaction history to differentiate mild from severe responses requiring intervention. This informs whether premedication or alternative imaging is needed. A transferable strategy is to document and verify reaction details thoroughly, enabling tailored precautions like premedication for future contrast procedures.
- A 60-year-old client with type 2 diabetes is scheduled for CT of the kidneys with iodinated contrast (iohexol) to evaluate hematuria. The client reports an allergy to "contrast dye" that caused hives 5 years ago; medications include metformin and insulin glargine; vital signs are blood pressure 134/80 mm Hg, heart rate 88/min; creatinine 1.0 mg/dL. Which medication order should the nurse QUESTION for a client with contrast allergy?
Answer: Order to administer iohexol IV without clarifying the prior reaction and without a premedication plan
When a stem asks which order to question, look for the one that proceeds with a known risk unaddressed. This client reports hives after contrast five years ago, so the order to administer iohexol intravenously without clarifying the prior reaction and without a premedication plan is the order to question, because a documented hypersensitivity history requires characterizing the reaction and confirming whether corticosteroid and antihistamine prophylaxis is indicated before the contrast is given. Keeping the client on nothing by mouth for four hours per facility protocol is routine pre-procedure preparation and poses no added danger here. Obtaining baseline vital signs immediately before contrast administration is actively protective, since it supplies the comparison point that lets you recognize a developing reaction. Starting a peripheral IV line is the necessary access both for the contrast itself and for emergency medications should a reaction occur. Question the order that skips a required safety step for an identified risk, not the ones that are ordinary preparation or monitoring.
- A 49-year-old client is scheduled for a CT scan of the abdomen with iodinated contrast (iohexol) to evaluate suspected diverticulitis. The client reports "shellfish allergy" with nausea only (no hives, swelling, or breathing problems) and takes sertraline; vital signs are blood pressure 122/78 mm Hg, heart rate 80/min; creatinine 0.8 mg/dL. The nurse should VERIFY which information with the client before the procedure?
Answer: Whether the client has had any prior reaction to iodinated contrast and what symptoms occurred
This question tests clinical judgment regarding contrast allergy precautions by verifying relevant history before abdominal CT. The priority concern is distinguishing true allergies from unrelated intolerances like shellfish nausea. Verifying prior iodinated contrast reactions and symptoms ensures safety by identifying actual risks and follows evidence-based screening. Option B is irrelevant for family allergies; option C is unrelated to acetaminophen; option D is unimportant for dental fillings. The decision-making principle is to probe for specific contrast exposure history, as shellfish allergy does not predict iodine reactions. This guides whether precautions are needed. A transferable strategy is to clarify reported allergies by asking about prior contrast symptoms, preventing unnecessary interventions.
- A 69-year-old client with chronic kidney disease is scheduled for CT of the abdomen and pelvis with iodinated contrast (ioversol) to evaluate bowel obstruction. The client reports a prior mild contrast reaction (itching) and takes metformin and amlodipine; vital signs are blood pressure 146/90 mm Hg; creatinine 2.0 mg/dL. Which client condition REQUIRES immediate intervention before contrast administration?
Answer: Creatinine 2.0 mg/dL prior to iodinated contrast administration
This question tests clinical judgment regarding contrast allergy precautions for CT in CKD clients with mild reactions. The priority concern is preventing CIN due to high creatinine. A creatinine of 2.0 mg/dL requires intervention to avoid renal damage, aligning with risk assessment protocols. Option B is acceptable for amlodipine; option C needs premed but is less immediate; option D is not urgent. The decision-making principle is to prioritize renal evaluation in CKD before iodinated contrast. Hydration or delays may be needed. A transferable strategy is to intervene on elevated creatinine by consulting providers for safer imaging options.
- A 55-year-old client with peripheral arterial disease is scheduled for lower-extremity angiography with iodinated contrast (iohexol). The client has a documented prior immediate contrast reaction (generalized hives) and takes prednisone 10 mg daily for rheumatoid arthritis; labs: serum creatinine 1.1 mg/dL; vital signs stable. Which medication order should the nurse QUESTION for a client with contrast allergy?
Answer: Penicillin G IV now for contrast allergy prophylaxis
This question tests clinical judgment regarding appropriate medications for contrast allergy prophylaxis. The priority concern is identifying and questioning inappropriate medication orders that could harm the client. The nurse should question penicillin G IV for contrast allergy prophylaxis because penicillin has no role in preventing or treating contrast reactions and its administration could cause an allergic reaction in susceptible individuals. Diphenhydramine (A) and methylprednisolone (B) are appropriate components of contrast premedication protocols; epinephrine (C) is correctly reserved for treating anaphylaxis if it occurs, not for prophylaxis. The decision-making principle is that contrast allergy premedication consists of corticosteroids and antihistamines, never antibiotics, and nurses must question orders that don't align with evidence-based protocols. A transferable strategy is to know the standard components of contrast premedication protocols (steroids and antihistamines) and question any orders that deviate from established guidelines, as this prevents medication errors and ensures appropriate prophylaxis.
- A 50-year-old client with a history of severe allergic reactions is scheduled for a contrast-enhanced CT abdomen with iodinated contrast (iohexol) to evaluate suspected diverticulitis. The client has allergies to iodinated contrast (anaphylaxis), latex (hives), and peanuts (angioedema); current medications include cetirizine and omeprazole; vital signs: BP 130/80 mm Hg, HR 88/min, RR 18/min. Which precaution should the nurse take PRIOR to administering contrast?
Answer: Start the IV with latex-free supplies and verify that emergency medications and airway equipment are immediately available
This question tests clinical judgment regarding comprehensive allergy precautions for a client with multiple severe allergies including contrast-induced anaphylaxis. The priority concern is preventing allergic reactions from multiple potential triggers during the procedure. Starting the IV with latex-free supplies and verifying emergency medications and airway equipment are immediately available addresses both the latex allergy risk and the high probability of contrast reaction given the history of anaphylaxis. Peanut-free meals (B) are irrelevant to the immediate procedure; administering contrast slowly while leaving the client unattended (C) is dangerous and contradicts the need for close monitoring; obtaining antibiotics (D) addresses the diagnosis but not the allergy risks. The decision-making principle is that clients with multiple severe allergies and prior anaphylaxis require comprehensive precautions addressing all allergen exposures and emergency preparedness. A transferable strategy is to implement a systematic approach for multi-allergic patients that addresses all potential allergens in the care environment while maintaining heightened emergency readiness throughout the procedure.
- A 55-year-old client is scheduled for an MRI of the spine with gadolinium contrast (gadobenate dimeglumine) to evaluate suspected spinal infection. The client reports a prior reaction to "MRI dye" with hives; medications include gabapentin; vital signs are blood pressure 128/80 mm Hg; eGFR 72 mL/min/1.73 m². Which precaution should the nurse take PRIOR to administering contrast?
Answer: Notify the provider of the prior gadolinium reaction and verify whether a premedication plan or alternative imaging is indicated.
A documented prior reaction to gadolinium with hives is a hypersensitivity history, and a prior reaction is the strongest predictor of a repeat reaction. The nurse should therefore notify the provider and verify whether a premedication plan or alternative imaging is indicated; the prescription and imaging decision stay with the provider while the history is acted on. Proceeding because eGFR 72 confirms normal renal function is incorrect because renal clearance addresses nephrogenic systemic fibrosis risk, not allergic reactivity; normal renal function does not make prior hives unrelated to allergy. Premedicating with antibiotics because the hives indicate an infection is also incorrect: hives after contrast are an allergic manifestation, and antibiotics do not prevent or treat hypersensitivity reactions. Instructing the client to take aspirin at home before the MRI is incorrect because aspirin is not an anti-allergy premedication, is not prescribed in the scenario, and increases bleeding risk before an imaging study. The only safe nursing action is to communicate the previous reaction and follow the provider's plan.
