ARRT Radiography Exam Quiz: Respond To Medical Emergencies
17 questions · exam conditions
0:00
Respond To Medical EmergenciesQuestion 1 of 17

During fluoroscopy, a diabetic patient becomes diaphoretic, confused, and exhibits tremors. The patient is conscious but disoriented. Vital signs are normal. What is the most appropriate initial intervention?

Administer oral glucose solution if the patient can swallow safely and protect airway
Immediately obtain IV access and administer 50mL of 50% dextrose solution
Place patient in recovery position and monitor for seizure activity development
Check blood glucose level first, then proceed based on specific numerical results
← Back to quizzes

ARRT Radiography Exam Quiz

ARRT Radiography Exam Quiz: Respond To Medical Emergencies

Practice Respond To Medical Emergencies in ARRT Radiography Exam with focused quiz questions that help you check what you know, review explanations, and build confidence with test-style prompts.

What this quiz covers

This quiz focuses on Respond To Medical Emergencies, giving you a quick way to practice the rules, question types, and explanations that matter most for ARRT Radiography Exam.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

All questions

Question 1

During fluoroscopy, a diabetic patient becomes diaphoretic, confused, and exhibits tremors. The patient is conscious but disoriented. Vital signs are normal. What is the most appropriate initial intervention?

  1. Administer oral glucose solution if the patient can swallow safely and protect airway (correct answer)
  2. Immediately obtain IV access and administer 50mL of 50% dextrose solution
  3. Place patient in recovery position and monitor for seizure activity development
  4. Check blood glucose level first, then proceed based on specific numerical results
Explanation: These are classic signs of hypoglycemia in a diabetic patient. The patient is conscious and can likely swallow, making oral glucose appropriate and safer than IV dextrose. Choice B is overly aggressive for a conscious patient who can take oral glucose. Choice C assumes seizure risk but doesn't address the underlying hypoglycemia. Choice D delays treatment - in a conscious diabetic with classic hypoglycemic symptoms, immediate glucose administration is appropriate without waiting for blood glucose results.

Question 2

Following IV contrast administration, a patient develops generalized urticaria and mild bronchospasm but maintains normal blood pressure and heart rate. The patient is anxious but alert. Which intervention sequence is most appropriate?

  1. Position patient upright, administer bronchodilator, and prepare epinephrine for standby use
  2. Give epinephrine intramuscularly immediately, followed by corticosteroids and H2 blockers
  3. Administer diphenhydramine IV, provide supplemental oxygen, and monitor closely for progression (correct answer)
  4. Discontinue contrast, administer epinephrine subcutaneously, and obtain arterial blood gas analysis
Explanation: When encountering contrast reaction scenarios, you need to quickly classify the severity to determine appropriate interventions. This patient presents with moderate allergic symptoms—urticaria and mild bronchospasm—but crucially maintains stable vital signs and consciousness, indicating a moderate reaction rather than severe anaphylaxis. For moderate contrast reactions, the priority is symptomatic treatment while closely monitoring for potential progression to anaphylaxis. Diphenhydramine (antihistamine) directly counteracts the histamine release causing urticaria, supplemental oxygen supports respiratory function during mild bronchospasm, and careful monitoring allows immediate escalation if symptoms worsen. This measured approach treats current symptoms without over-medicating a stable patient. Choice A positions the patient upright, which could worsen potential hypotension if the reaction progresses, and immediately preparing epinephrine suggests over-anticipating severity. Choice B jumps straight to epinephrine and steroids, which are anaphylaxis treatments—inappropriate when the patient maintains normal blood pressure and heart rate. The patient isn't showing signs of cardiovascular compromise or severe respiratory distress. Choice D suggests subcutaneous epinephrine (less effective than IM if epinephrine were needed) and arterial blood gas analysis, which is unnecessary for mild bronchospasm in an alert patient. Remember this progression principle: treat the current severity level while staying prepared to escalate. Mild reactions get supportive care, moderate reactions get antihistamines and close monitoring, and severe reactions (hypotension, severe respiratory distress, altered consciousness) get immediate epinephrine. Don't over-treat stable patients, but always be ready to step up interventions.

Question 3

An unconscious trauma patient arrives for emergency CT. During positioning, the radiographer notices the patient has shallow, irregular breathing and cannot detect a radial pulse, but observes chest movement. What should be the immediate response?

  1. Obtain arterial blood gas and chest x-ray to evaluate respiratory status before further intervention
  2. Provide bag-mask ventilation to support the inadequate respiratory effort being observed
  3. Complete the CT scan emergently to identify life-threatening injuries requiring surgical intervention
  4. Check for carotid pulse immediately and begin chest compressions if no pulse is detected (correct answer)
Explanation: When you encounter emergency situations in radiography, patient assessment and life support always take priority over imaging procedures. This question tests your understanding of the ABCs of emergency care: Airway, Breathing, and Circulation. The scenario describes a patient with shallow, irregular breathing (compromised breathing) and no detectable radial pulse (potential circulation failure). While you can see chest movement indicating some respiratory effort, the absence of a radial pulse is critically concerning. Radial pulses can be lost when systolic blood pressure drops below 80-90 mmHg, but central pulses like the carotid remain palpable until much lower pressures. You must immediately check for a carotid pulse, and if absent, begin CPR – this addresses the most life-threatening issue first. Option A is wrong because obtaining tests delays critical intervention when the patient may be in cardiac arrest. Option B addresses breathing but ignores the more serious circulation problem – without adequate circulation, oxygenation won't matter. Option C prioritizes imaging over basic life support, which violates fundamental emergency care principles. Option D correctly follows emergency protocols by checking central circulation first, then initiating CPR if needed. This addresses the most immediately life-threatening condition. Key takeaway for the ARRT exam: Emergency questions always prioritize patient care over procedures. Remember the ABCs hierarchy, and when circulation is compromised (no pulse), that becomes your immediate priority. Never continue with imaging when a patient may be in cardiac arrest.

Question 4

A patient scheduled for CT angiography has a documented shellfish allergy but no prior contrast reactions. During the injection, the patient develops nausea and reports feeling 'warm all over' but vital signs remain stable. What is the most appropriate course of action?

  1. Continue the injection as these represent normal contrast-related sensations, not allergic reactions
  2. Stop the injection immediately and prepare for potential allergic reaction management (correct answer)
  3. Slow the injection rate significantly and monitor for development of additional symptoms
  4. Complete the injection quickly to minimize exposure time, then observe for 30 minutes post-procedure
Explanation: In a patient with known allergies (even non-contrast related), nausea and warmth can be early signs of allergic reaction and should be taken seriously. Stopping the injection prevents further exposure while preparing for potential escalation. Choice A dismisses potentially significant symptoms in an at-risk patient. Choice C continues allergen exposure. Choice D completes the injection despite warning signs and uses inappropriate observation timing.

Question 5

A patient receiving IV contrast for a CT scan develops sudden onset of stridor, facial edema, and reports feeling 'like something is closing my throat.' Blood pressure remains stable at 125/75 mmHg. The radiographer should recognize this presentation as indicating:

  1. Mild allergic reaction requiring antihistamine administration and continued monitoring
  2. Severe anaphylactic reaction requiring immediate epinephrine despite stable blood pressure (correct answer)
  3. Vasovagal reaction requiring patient repositioning and IV fluid bolus administration
  4. Anxiety reaction requiring reassurance and completion of the imaging procedure
Explanation: Stridor and angioedema (facial swelling) with throat tightness indicate severe allergic reaction with airway involvement, constituting anaphylaxis regardless of blood pressure stability. This requires immediate epinephrine. Choice A underestimates severity - airway involvement makes this severe, not mild. Choice C misidentifies the reaction type - vasovagal reactions cause hypotension and bradycardia, not airway swelling. Choice D is dangerous as this represents a true medical emergency, not anxiety.

Question 6

A patient undergoing an upper GI series suddenly collapses. The radiographer finds the patient unconscious with no detectable pulse. After activating emergency response, CPR is initiated. An AED arrives and analyzes the rhythm as 'shock advised.' After delivering the shock, what should occur next?

  1. Immediately reanalyze the rhythm to determine if additional shocks are needed
  2. Check for pulse and breathing before resuming any further interventions
  3. Resume chest compressions immediately and continue CPR for 2 minutes before rhythm reanalysis (correct answer)
  4. Administer rescue breathing for 30 seconds, then check for return of spontaneous circulation
Explanation: Current AED/CPR guidelines require immediate resumption of chest compressions after shock delivery, continuing for 2 minutes before rhythm reanalysis. Choice A delays compressions - rhythm reanalysis should wait. Choice B wastes critical time checking pulse/breathing immediately post-shock. Choice D prioritizes breathing over compressions and uses incorrect timing - pulse checks occur after 2-minute CPR cycles, not after 30 seconds of breathing.

Question 7

A radiographer notices a patient becoming increasingly restless during a contrast-enhanced CT procedure. The patient then develops urticaria and reports difficulty swallowing. Vital signs show blood pressure 90/60 mmHg (baseline 130/80 mmHg) and heart rate 110 bpm. What is the most appropriate immediate action?

  1. Discontinue the contrast injection and prepare epinephrine for intramuscular administration (correct answer)
  2. Complete the imaging procedure quickly to minimize total contrast exposure time
  3. Administer oral diphenhydramine and continue monitoring the patient's vital signs
  4. Position the patient in Trendelenburg and increase IV fluid rate to address hypotension
Explanation: This patient is exhibiting signs of anaphylaxis (urticaria, dysphagia, hypotension, tachycardia). The most critical immediate action is to stop the allergen source (contrast) and prepare epinephrine, which is the first-line treatment for anaphylaxis. Choice B is dangerous as it continues allergen exposure. Choice C uses oral medication when the patient has difficulty swallowing and uses a slower-acting antihistamine rather than epinephrine. Choice D addresses hypotension but ignores the underlying anaphylactic reaction requiring epinephrine.

Question 8

A patient receiving ionic contrast for an IVP suddenly develops severe hypotension (BP 70/40 mmHg), tachycardia (HR 130 bpm), and diffuse urticaria, but no respiratory symptoms. What is the most critical immediate intervention?

  1. Administer epinephrine intramuscularly and establish large-bore IV access for fluid resuscitation (correct answer)
  2. Position patient in Trendelenburg, administer IV fluids rapidly, and give diphenhydramine
  3. Provide supplemental oxygen, give corticosteroids IV, and monitor cardiac rhythm continuously
  4. Stop contrast administration, give epinephrine subcutaneously, and prepare for potential intubation
Explanation: This is anaphylactic shock with cardiovascular collapse. Epinephrine IM is first-line treatment, and IV access is critical for fluid resuscitation in distributive shock. Choice B treats hypotension but ignores the underlying anaphylaxis requiring epinephrine. Choice C uses slower-acting medications and doesn't address the immediate need for epinephrine. Choice D uses wrong epinephrine route (subcutaneous vs. intramuscular) and prepares for intubation unnecessarily when no respiratory symptoms are present.

Question 9

During a barium enema procedure, an elderly patient suddenly becomes unresponsive. The radiographer finds no palpable pulse at the wrist and observes agonal breathing. After calling for help, what should be the next priority action?

  1. Immediately begin chest compressions at a rate of 100-120 compressions per minute (correct answer)
  2. Check for a carotid pulse for 10 seconds before initiating any interventions
  3. Position the patient supine and administer rescue breathing at 10-12 breaths per minute
  4. Obtain automated external defibrillator while monitoring respiratory pattern for changes
Explanation: This patient is in cardiac arrest (unresponsive, no pulse, agonal breathing). Current guidelines emphasize immediate chest compressions without delay. Choice B wastes critical time - if no radial pulse is present and the patient is unresponsive, assume cardiac arrest and begin compressions. Choice C prioritizes breathing over circulation, which is incorrect in cardiac arrest. Choice D delays compressions; while AED retrieval is important, compressions should begin immediately and AED retrieval can occur simultaneously by others.

Question 10

A patient receiving IV iodinated contrast suddenly develops severe bronchospasm with audible wheezing, blood pressure of 60/40 mmHg, and rapidly deteriorating consciousness. The radiologist diagnoses anaphylaxis and orders emergency treatment. Which of the following is the MOST critical first pharmacological intervention?

  1. Epinephrine 0.3 to 0.5 mg of the 1:1000 concentration, administered intramuscularly into the anterolateral thigh (correct answer)
  2. Diphenhydramine 50 mg IV, which blocks the histamine receptor and interrupts the allergic cascade
  3. Methylprednisolone 125 mg IV to suppress the inflammatory response and prevent the biphasic reaction
  4. High-flow oxygen at 15 L/min via non-rebreather mask to restore oxygenation before any pharmacological intervention
Explanation: How to get the right answer: Epinephrine is the only drug that simultaneously reverses all components of anaphylaxis. Its beta-2 adrenergic effect produces bronchodilation, its alpha-1 effect increases vascular resistance and restores blood pressure, and it reduces capillary permeability and supports cardiac output. No other single agent addresses all of these mechanisms at once. The 1:1000 concentration delivered intramuscularly into the anterolateral thigh provides the fastest and most reliable peak serum concentration in anaphylaxis patients. The thigh is preferred over the deltoid because of its greater muscle mass and vascularity. Intramuscular injection is preferred over subcutaneous administration because peripheral vasoconstriction (a consequence of anaphylaxis) makes subcutaneous absorption variable and unreliable. The dose may be repeated every 5 to 15 minutes if the response is inadequate. Why the other answers are wrong: Choice B is wrong because diphenhydramine (an H1 antihistamine) takes 15 to 30 minutes to act and can block histamine receptors but cannot restore blood pressure, reverse severe bronchospasm, or address the capillary leak driving cardiovascular collapse; it is an important adjunct but must not precede or replace epinephrine. Choice C is wrong because corticosteroids have an onset measured in hours and are entirely incapable of reversing acute anaphylaxis; methylprednisolone is useful for preventing biphasic reactions but is categorically a second-line adjunct, not a first-line intervention. Choice D is wrong because high-flow oxygen is critically important and must be administered simultaneously with epinephrine, but oxygen alone does not address bronchospasm, vasodilation, or cardiovascular collapse; epinephrine must be the first pharmacological priority regardless of other supportive measures. Big idea to remember: In anaphylaxis, epinephrine is the treatment: 0.3 to 0.5 mg of the 1:1000 concentration IM into the anterolateral thigh, repeated every 5 to 15 minutes as needed; diphenhydramine and corticosteroids are adjuncts that follow, never precede, epinephrine.

Question 11

A patient undergoing a head CT begins experiencing generalized tonic-clonic seizure activity. The radiographer is alone in the control room and observes the seizure via monitor. Which of the following MOST accurately describes the correct immediate response?

  1. Immediately restrain the patient's extremities to prevent self-injury from the convulsive movements
  2. Activate emergency response, ensure patient safety by clearing surroundings, and place in lateral position post-seizure without restraining or inserting objects. (correct answer)
  3. Continue the CT scan while monitoring; the seizure may be brief, and completing the scan provides diagnostic information about the cause
  4. Insert a padded bite stick between the patient's teeth immediately to prevent tongue biting during the convulsion
Explanation: How to get the right answer: Two historically common responses to seizures are both contraindicated and must be actively avoided. First, restraining tonic-clonic limb movements risks fracturing the patient's bones because the force of generalized convulsions can exceed the structural limits of joints and long bones when a fixed resistance is applied; the correct approach is to guide limbs away from hard surfaces without holding them down. Second, placing any object in the patient's mouth is a definitively outdated practice based on the myth that a person can swallow their tongue, which is physiologically impossible; inserting objects risks dental fractures, jaw injury, aspiration of the object, and serious bite injury to the rescuer. Timing the seizure duration is important because prolonged seizures (more than 5 minutes) constitute status epilepticus and require urgent pharmacological intervention. After convulsive movements stop, the post-ictal state produces reduced muscle tone and diminished protective reflexes, making the lateral recovery position essential for airway protection and aspiration prevention. Why the other answers are wrong: Choice A is wrong because restraining tonic-clonic movements risks fracturing bones under the force of the convulsions; the correct action is to clear the immediate environment, not to hold the limbs. Choice C is wrong because the patient's physical safety is the immediate priority; the scan must stop and the radiographer must physically attend to the patient without delay. Choice D is wrong because inserting a bite stick or any object into a seizing patient's mouth is a contraindicated, outdated practice that risks dental fracture, aspiration, and injury to both the patient and the rescuer; tongue biting is a minor risk compared to the injuries caused by forced oral insertion. Big idea to remember: Seizure management has two absolute contraindications: do not restrain limbs (fracture risk) and do not insert anything in the mouth (dental, aspiration, and rescuer injury risk); protect the environment, time the event, activate emergency services, and use the lateral recovery position after convulsions stop.

Question 12

A patient in the radiology waiting room suddenly develops right-sided facial drooping, right arm weakness (the right arm drifts down when asked to raise both arms), and slurred speech. The patient was alert and conversing normally 3 minutes earlier. Which of the following MOST accurately describes the correct recognition and response?

  1. Activate emergency response for suspected stroke; symptoms meet FAST criteria. Document symptom onset time, keep patient NPO, and prioritize immediate medical intervention over waiting for physician assessment. (correct answer)
  2. The patient is experiencing a vasovagal reaction; position them supine and monitor until symptoms resolve with restored cerebral perfusion
  3. These symptoms are consistent with a medication side effect from pre-procedure preparation; hold the examination and contact the ordering physician for a medication review before taking further action
  4. Call the radiologist for assessment and determine whether the CT already scheduled for this patient can serve as the initial stroke workup before activating emergency services
Explanation: How to get the right answer: FAST is the validated tool for community and clinical stroke recognition: unilateral facial drooping, arm drift (one arm falls when both are raised simultaneously), and abnormal speech (slurred, absent, or confused). The sudden onset of all three in a previously alert patient indicates an acute focal neurological event, most likely ischemic stroke. The treatment window for IV tPA is 4.5 hours from symptom onset in eligible patients, and mechanical thrombectomy may be possible within 24 hours for selected patients; every minute of delay reduces the probability of complete neurological recovery. The exact symptom onset time must be documented precisely because it determines treatment eligibility. The radiographer must call emergency services immediately without waiting to locate a physician; delay for physician search wastes irreplaceable treatment time. Oral intake must be withheld because swallowing dysfunction in acute stroke creates aspiration risk. Why the other answers are wrong: Choice B is wrong because vasovagal syncope produces brief generalized loss of consciousness with rapid and complete recovery in the supine position; it does not produce persistent focal neurological deficits such as unilateral facial drooping, arm weakness, and speech difficulty, which indicate a focal brain event. Choice C is wrong because sudden onset focal neurological deficits do not represent medication side effects; the combination of face, arm, and speech findings with abrupt onset is the clinical hallmark of acute stroke, not a pharmacological reaction. Choice D is wrong because routing through the radiologist before calling emergency services wastes critical treatment time; the emergency call must be the first action, not a secondary step after internal consultation. Big idea to remember: FAST (Face, Arm, Speech, Time) identifies acute stroke; the radiographer's immediate action is to call emergency services now, document the exact onset time, and keep the patient NPO, without delaying for physician consultation, because every minute of untreated ischemic stroke destroys approximately 1.9 million neurons.

Question 13

A diabetic patient who has been fasting since midnight for an upper GI series becomes tremulous, diaphoretic, and confused in the waiting room. A glucometer reads 42 mg/dL. Which of the following MOST accurately describes the appropriate immediate management?

  1. Send the patient to the emergency department before any treatment in the radiology department, as hypoglycemia requires physician management only
  2. Complete the upper GI series first since the patient has already been fasting, then administer glucose after the examination
  3. Administer 15-20 grams of fast-acting oral glucose immediately and recheck blood glucose in 15 minutes, cancel the examination. (correct answer)
  4. Give the patient crackers or dry toast to slowly stabilize blood glucose before the examination proceeds
Explanation: How to get the right answer: At 42 mg/dL with active neurological symptoms (trembling, diaphoresis, confusion), the patient's brain glucose is critically depleted. Without treatment, hypoglycemia at this level progresses through confusion and agitation to seizure and coma. For a conscious patient who can swallow safely, oral fast-acting simple glucose is the fastest available intervention and should be given immediately. The 15-15 rule (15 to 20 grams of oral glucose followed by a blood glucose recheck at 15 minutes) is the standard management approach; if the reading remains below 70 mg/dL, the glucose administration is repeated. The examination must be cancelled because continuing the fast would be dangerous and clinically unethical. If the patient cannot swallow or is unconscious, IV dextrose or glucagon replaces oral glucose to eliminate aspiration risk. Why the other answers are wrong: Choice A is wrong because hypoglycemia is rapidly reversible with oral glucose in a conscious patient who can swallow; delaying treatment by transferring the patient before any intervention risks serious deterioration, including seizure or loss of consciousness during transfer; oral glucose should be given immediately while emergency assistance is arranged. Choice B is wrong because continuing to fast a patient with symptomatic hypoglycemia at 42 mg/dL is dangerous; the examination is not more urgent than the patient's acute metabolic crisis. Choice D is wrong because crackers and complex carbohydrates are too slow to raise blood glucose adequately in acute symptomatic hypoglycemia; simple fast-acting glucose (juice, glucose tablets) is required to rapidly correct the deficit. Big idea to remember: Symptomatic hypoglycemia below 70 mg/dL in a conscious patient who can swallow requires immediate oral fast-acting glucose and the 15-15 rule; an unconscious patient or one who cannot swallow requires IV dextrose or glucagon; in either case, the fasting examination must be cancelled and the physician notified.

Question 14

A patient undergoing a lower extremity venogram suddenly develops acute chest pain, severe shortness of breath, oxygen saturation dropping to 88%, a heart rate of 126 bpm, and marked anxiety. The patient had total knee replacement surgery 12 days earlier. Which of the following MOST accurately describes the radiographer's recognition of this presentation and the appropriate immediate response?

  1. This presentation is consistent with a vasovagal reaction to the contrast injection; position the patient supine with legs elevated and monitor without activating emergency services
  2. This is a severe contrast reaction; administer epinephrine immediately and activate the contrast reaction protocol
  3. These symptoms suggest acute pulmonary embolism; activate emergency response, administer high-flow oxygen, position semi-upright if possible, and notify the radiologist and treating physician immediately. (correct answer)
  4. These symptoms indicate pneumothorax from the contrast injection; obtain a chest radiograph to confirm the diagnosis before initiating other interventions
Explanation: How to get the right answer: Major orthopedic surgery (hip and knee replacement) is one of the highest-risk categories for venous thromboembolism, and the post-surgical period between approximately 2 and 14 days represents the peak risk window for pulmonary embolism. The clinical presentation of sudden pleuritic chest pain, dyspnea, tachycardia, and oxygen desaturation in this context is PE until proven otherwise. Virchow's triad explains the mechanism: post-surgical bed rest and immobility produce venous stasis; surgical dissection and instrumentation of tissue produce endothelial injury; and the systemic inflammatory response to surgery generates a hypercoagulable state. All three factors are simultaneously present in this patient. Massive PE with hemodynamic instability has time-sensitive mortality; treatment delay increases risk significantly. The radiographer's role is to recognize the clinical picture, activate emergency services without delay, provide oxygen, and monitor until the physician team assumes care. Why the other answers are wrong: Choice A is wrong because vasovagal syncope produces bradycardia and hypotension in response to excess vagal tone; this patient has tachycardia at 126 bpm, which is the opposite of the bradycardia expected in a vasovagal reaction; additionally, the clinical context of recent major surgery points strongly away from a vasovagal mechanism. Choice B is wrong because contrast reactions follow an allergic pathway characterized by urticaria, bronchospasm, and anaphylaxis occurring within minutes of contrast administration; the presentation here involves chest pain and tachycardia without allergic features and occurs in a very high-risk surgical patient, making PE the far more consistent diagnosis. Choice D is wrong because venogram procedures do not cause pneumothorax; additionally, delaying emergency response to obtain a radiograph first allows a potentially massive PE to progress without treatment. Big idea to remember: Post-major orthopedic surgery plus sudden chest pain, dyspnea, tachycardia, and hypoxia equals pulmonary embolism until proven otherwise; Virchow's triad (stasis, endothelial injury, hypercoagulability) explains why post-surgical patients are at peak risk, and the emergency response must be activated immediately without waiting for imaging confirmation.

Question 15

A radiographer assesses an unresponsive patient in the waiting area and finds no visible chest movement, no audible breath sounds, and developing cyanosis of the lips, but a strong carotid pulse is clearly palpable. Which of the following MOST accurately describes the correct interpretation and immediate action?

  1. Begin full CPR with compressions and ventilations immediately to prevent cardiac arrest before it develops
  2. Perform rescue breaths with airway management, activate emergency response, and reassess pulse every 2 minutes; start CPR if pulse is lost. (correct answer)
  3. The palpable carotid pulse with absent breathing confirms a stable situation; monitor oxygen saturation and wait for the patient to resume spontaneous breathing
  4. Administer high-flow oxygen via non-rebreather mask and observe for spontaneous resumption of breathing before initiating any ventilation assistance
Explanation: How to get the right answer: The presence of a palpable pulse is the critical finding that changes the entire management approach. In cardiac arrest (absent pulse), compressions are required to generate circulation because the heart is not beating. In respiratory arrest (pulse present), the heart is functioning and can continue to perfuse the body if oxygenation is restored quickly; the priority is delivering ventilations to the lungs, not simulating cardiac output. Beginning chest compressions on a patient with a beating heart wastes effort and time that should be directed entirely at the respiratory problem. However, respiratory arrest leads rapidly to cardiac arrest if untreated because progressive hypoxia causes myocardial ischemia; the pulse must be assessed every 2 minutes, and if it is lost, full CPR with compressions begins immediately without delay. Why the other answers are wrong: Choice A is wrong because starting chest compressions on a patient with a palpable pulse is unnecessary and diverts effort from the actual problem, which is the absence of breathing; compressions are initiated only when the pulse is absent or becomes absent. Choice C is wrong because an unresponsive, apneic patient with developing cyanosis is in a critical emergency; waiting for spontaneous breathing while hypoxia progresses will result in cardiac arrest and irreversible brain injury within minutes. Choice D is wrong because passive oxygen delivery via mask does not ventilate the lungs of a patient who is not breathing; active rescue ventilations are required to move oxygen into the airways when spontaneous breathing is absent. Big idea to remember: Respiratory arrest (present pulse, absent breathing) requires rescue ventilations at 1 breath every 5 to 6 seconds with no compressions; cardiac arrest (absent pulse, absent breathing) requires full CPR; the pulse check is the decision point, and if the pulse is lost at any time during management of respiratory arrest, full CPR begins immediately.

Question 16

An AED has arrived at the side of a radiography room patient in cardiac arrest. The radiographer has powered on the AED and attached the electrode pads (right pad below the right clavicle, left pad over the cardiac apex on the left lateral chest). Which of the following describes the correct sequence of remaining steps?

  1. Check the patient's rhythm on the AED display manually, confirm the rhythm type, then announce clear and deliver the shock
  2. Deliver the shock immediately after confirming pad contact, then check the carotid pulse for 60 seconds to confirm whether the shock restored spontaneous circulation before resuming CPR
  3. Allow the AED to analyze the rhythm, deliver the shock if advised, then check the carotid pulse for 10 seconds before deciding whether to resume compressions
  4. Ensure everyone is clear, let the AED analyze the rhythm, deliver shock if advised, and immediately resume CPR starting with chest compressions without checking for a pulse. (correct answer)
Explanation: How to get the right answer: The most critical and commonly misunderstood element of post-shock management is the immediate resumption of CPR without a pulse check. AHA guidelines explicitly discourage post-shock pulse checks because the hands-off time required to assess for a pulse allows coronary and cerebral perfusion to fall; compressions should begin immediately after shock delivery regardless of whether the patient appears to have a pulse, and the AED will re-analyze after approximately 2 minutes of CPR to determine whether a further shock is needed. The clear call before analysis and shock delivery is a patient and rescuer safety requirement; contact with the patient during AED analysis causes motion artifact that can prevent accurate rhythm detection, and contact during shock delivery transfers current to the rescuer. The AED machine, not the rescuer, performs rhythm analysis; the rescuer's role is to clear the patient, follow prompts, and resume CPR immediately after each shock. Why the other answers are wrong: Choice A is wrong because the AED analyzes the rhythm automatically using its own algorithm; the rescuer does not manually interpret the rhythm from the display before the shock; attempting manual rhythm interpretation before proceeding delays the process and is outside the rescuer's role with an AED. Choice B is wrong because a 60-second post-shock pulse check is specifically contraindicated by AHA guidelines; the delay in compressions worsens outcomes; CPR must resume immediately. Choice C is wrong because even a 10-second post-shock pulse check introduces unnecessary hands-off time; AHA guidelines are clear that compressions resume immediately after shock delivery without any pulse assessment. Big idea to remember: After AED shock delivery, resume CPR immediately without checking for a pulse; post-shock pulse checks delay compressions and reduce survival; the AED will re-analyze after approximately 2 minutes of CPR and advise accordingly.

Question 17

During a cardiac catheterization procedure, a patient suddenly becomes unconscious. The monitor shows ventricular fibrillation. The radiographer's first priority should be to:

  1. Document the time of rhythm change and prepare emergency medications for physician administration
  2. Quickly check carotid pulse to confirm the rhythm matches the clinical presentation
  3. Ensure the patient airway is clear and begin rescue breathing at appropriate rate
  4. Immediately begin chest compressions while calling for the defibrillator and emergency team (correct answer)
Explanation: When you encounter emergency cardiac situations in radiography, remember that ventricular fibrillation is a lethal rhythm requiring immediate intervention. V-fib means the heart is quivering ineffectively and cannot pump blood, making this a cardiac arrest situation where every second counts. The correct response is D because ventricular fibrillation requires immediate chest compressions to maintain circulation to vital organs, especially the brain. Current CPR guidelines emphasize starting compressions within 10 seconds of recognizing cardiac arrest, as brain damage begins after 4-6 minutes without oxygen. Calling for the defibrillator and emergency team simultaneously ensures definitive treatment arrives quickly, since defibrillation is the only way to convert V-fib back to a normal rhythm. A is wrong because documentation and medication preparation waste precious time when immediate physical intervention is needed. Medications are secondary to compressions and defibrillation in V-fib. B is incorrect because checking pulses delays treatment—if the monitor shows V-fib and the patient is unconscious, you should assume cardiac arrest and act immediately. Taking time to confirm wastes critical seconds. C focuses on airway and breathing, but in V-fib, circulation is the priority. Without chest compressions, rescue breathing won't deliver oxygen to tissues since there's no effective blood flow. Remember the CAB sequence for cardiac emergencies: Circulation (compressions), Airway, Breathing. In witnessed cardiac arrest with V-fib, compressions and defibrillation take absolute priority over everything else. Time to first compression directly correlates with survival rates.