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Free NREMT practice questionsFree AEMT practice questions · Cardiology & Resuscitation

10 free AEMT practice questions: Resuscitation and IV/IO Access

These are real questions from the same bank the app draws from. Each one is written to the NREMT AEMT content specifications and kept inside the AEMT scope of practice. Pick an answer and you get the full rationale, including why the other three options are wrong.

Work through all 10, then move on to the next topic. When you want the full picture, the free AEMT diagnostic covers every topic in one sitting. No account needed for any of it.

Question 1 of 10

An AEMT places an intraosseous needle in the proximal tibia of a patient in shock. The needle stands upright without support. When the line is opened, no fluid flows. What should the AEMT do first?

Show the answer and rationale

Correct answer · Flush the catheter with a rapid syringe push of normal saline

Marrow is a network of sinusoids packed with fat and cells, and none of it will accept flow until you open it. The flush is what does that: five to ten milliliters in an adult, two to five in a child, pushed firmly. Treat it as part of placement rather than as troubleshooting, and expect to need a pressure infuser bag or repeated syringe pushes afterward, because these lines do not run by gravity at resuscitation rates. A needle that stands upright on its own is telling you it is seated, so no flow at that point is almost always the flush you have not given yet.

Why the others are wrong

Remove the needle and place a new one in the other leg: Starting over is the instinct when something does not work, and a misplaced needle is a real possibility. A needle standing upright without support is the sign that it is seated in bone. Pulling a good line and spending another minute on the other leg gives up the access you already have.

Raise the fluid bag higher to increase the gravity head: Height does drive flow in a gravity line, so this is the right reflex for an intravenous drip. An intraosseous line does not flow by gravity at useful rates no matter how high the bag goes, which is why a pressure bag or syringe pushes are standard. Raising the bag tests nothing about the real problem.

Rotate the needle a quarter turn to open the marrow space: Repositioning hardware sounds like a reasonable next move, and turning things often frees them. Rotating a seated needle risks widening the tract around it, which is how fluid ends up leaking into the surrounding tissue. The marrow opens with pressure from a flush, not with movement of the needle.

Question 2 of 10

An AEMT is starting an IV on a stable patient with good veins in both the hand and the antecubital fossa. Why does the standard approach begin at the most distal suitable site?

Show the answer and rationale

Correct answer · A blown distal site still leaves the vein above it usable

Think about where the fluid goes if the vein is damaged. Blood returns from the hand toward the heart, so a puncture higher up the arm leaks into the tissue every time fluid passes it from below. Start at the hand or forearm and a failed attempt costs you that one site while everything proximal to it stays available. Start at the antecubital vein and a failure takes the whole limb out of play. That is the reasoning, and it is worth knowing rather than memorizing the rule alone, because it tells you when to break it: a crashing patient who needs volume now gets the big proximal vein, and you accept that you have spent the limb.

Why the others are wrong

Distal veins are larger, so they accept a bigger catheter: Catheter size does follow vein size, and matching the two is real practice. The relationship runs the other way, since proximal veins are the larger ones, which is why a patient needing volume fast gets a proximal site. Distal veins are chosen for sequence, not for size.

Distal sites are less painful, so the patient tolerates the stick better: Hand sticks feel different from antecubital sticks, so a comfort explanation sounds plausible. Distal sticks are often the more uncomfortable ones, because the skin there is thinner and better supplied with nerves. Comfort is not what sets the order.

Distal sites reach the central circulation faster than proximal ones: Every peripheral vein does drain to the same place, so speed of delivery is a reasonable thing to wonder about. Circulation time from the hand is slightly longer, not shorter, and the difference does not drive site selection at this level. Flow rate and preserving future sites are what matter.

Question 3 of 10

A 20 kg child with three days of severe gastroenteritis is tachycardic with capillary refill of four seconds and cool hands. Two 400 mL boluses of warmed isotonic crystalloid have produced only brief improvement. The child is still tachycardic with delayed refill, the lungs are clear, and there is no sign of bleeding. What should the AEMT do next?

Show the answer and rationale

Correct answer · Consider a third 400 mL bolus, since perfusion is still poor

Run the arithmetic first: 400 mL in a 20 kg child is 20 mL/kg, so this child has had the standard bolus twice. The sequence is 20 mL/kg of warmed isotonic crystalloid with a full reassessment, a second 20 mL/kg if there is no response, and a third considered after that. Where the third one gets held back is uncontrolled bleeding, because that child needs a surgeon rather than another bag. Losses from vomiting and diarrhea are different: the same approach applies with restored perfusion as the endpoint rather than a fixed volume. Clear lungs tell you there is still room. The finding that would stop you is the one that has not appeared yet, which is new crackles.

Why the others are wrong

Hold further fluid, since two boluses is the pediatric maximum: Two boluses is where many people remember the sequence ending, and stopping feels cautious in a small patient. The third bolus is part of the taught sequence rather than an overreach, and what limits it is uncontrolled hemorrhage rather than a count. This child is still poorly perfused with clear lungs, which is the situation the third bolus exists for.

Give 800 mL this time, since the smaller boluses have not held: Escalating when smaller doses have not held is a reasonable pattern in other settings, and this child clearly needs more volume. Doubling the increment gives up the reassessment that sits between boluses, which is the part that catches overload before it becomes a problem. The increment stays the same; what changes is whether you give another one.

Hold fluid and give oxygen alone, since the losses are not from bleeding: Oxygen belongs in the care of any child this sick, and it costs nothing. Oxygen does not replace circulating volume, and a child with a four second capillary refill after two boluses is still short of fluid. The absence of bleeding is a reason to keep giving crystalloid rather than a reason to stop.

Question 4 of 10

An AEMT is with a 78-year-old patient who has had crushing chest pressure for an hour. The patient is pale, cool, and clammy, and will not tolerate lying flat. Vital signs are BP 82/60, P 116, R 26, SpO₂ 90% on room air. The patient's neck veins are distended and crackles are audible at both lung bases. Which finding most strongly argues against a rapid fluid bolus?

Show the answer and rationale

Correct answer · Distended neck veins together with crackles at both lung bases

Sort shock with two findings taken in order. Neck veins first: flat means the system is underfilled, which points to hypovolemic or distributive; distended means blood is backing up because it cannot get through the chest, which points to cardiogenic or obstructive. For the distended pair, listen to the lungs: crackles mean the pump failed and fluid backed up into them, which is cardiogenic; clear lungs mean the pump is fine and something outside it is in the way, which is obstructive. The useful part for treatment is that the same assessment that names the category names the restriction. A heart that cannot move the volume it already has is not helped by more volume, and a large bolus pushed into a failing left ventricle backs up into the lungs. Fluid here goes in increments of about 250 mL with the lungs rechecked between them.

Why the others are wrong

A heart rate of 116/min with cool, clammy skin: Tachycardia with cool, clammy skin is a genuine shock finding and it appears in almost every category, which is what makes it feel important. That is exactly why it does not sort anything here. A clamped-down, fast circulation is just as consistent with an empty tank, and an empty tank is the patient who needs the fluid.

A systolic pressure of 82 mmHg in a patient this age: A systolic of 82 mmHg is the number that makes this patient look like the patient needs volume, so reading it as an argument against fluid feels backwards. Hypotension tells you perfusion has failed; it does not tell you why. In a failing pump the low pressure comes from output the heart cannot generate, and volume does not fix that.

A saturation of 90 percent with a respiratory rate of 26: A saturation of 90 percent with fast breathing is a real problem and it does deserve treatment. It is a consequence of the fluid already sitting in the patient's lungs rather than an independent reason to withhold more. The finding that tells you where that fluid came from is the one to reason from.

Question 5 of 10

An AEMT gives naloxone to a 27-year-old patient found with pinpoint pupils and respirations of 6 per minute. The patient's breathing improves to 14 per minute and the color returns, but the patient remains sleepy and does not open the eyes. What should the AEMT do?

Show the answer and rationale

Correct answer · Stop dosing and keep watching the patient's respiratory rate during transport

Naloxone is aimed at one thing, which is breathing. The endpoint is adequate spontaneous ventilation, not a patient who is awake and talking to you. Pushing past that point buys agitation and acute withdrawal without improving the problem you were treating, and an agitated patient in the back of an ambulance is harder to protect than a sleepy one who is breathing well. Two things follow from that. Keep watching the respiratory rate, because naloxone often wears off before the opioid does and the depression can return, and repeat per protocol if it does. Transport the patient, since a refusal after naloxone is a high-risk refusal that needs a careful capacity assessment and real documentation.

Why the others are wrong

Give a repeat dose until the patient is awake and answering questions: Full wakefulness feels like the obvious sign the drug worked, and a patient who answers questions is easier to assess. Waking the patient completely precipitates withdrawal and agitation while adding nothing to the ventilation you already restored. The rate of 14 with improved color is the result you were after.

Give the rest of the dose so the effect lasts longer than the opioid: Worrying about naloxone wearing off before the opioid does is exactly the right worry, and it is a real risk. More drug now does not extend the duration; it deepens the reversal and brings on withdrawal sooner. The answer to that risk is continued monitoring with repeat dosing per protocol if the breathing slows again.

Stop dosing and support a refusal if the patient stays this stable on scene: The patient looks stable and patients in this situation often want to stay, so the conversation feels reasonable. Naloxone frequently wears off before the opioid does, which means the patient who looks fine on scene can stop breathing after you leave. That is what makes a refusal here high-risk rather than routine.

Question 6 of 10

A 4-year-old patient in septic shock needs vascular access and peripheral attempts have failed. The parents say a hospital crew placed an intraosseous line in the patient's right proximal tibia yesterday afternoon during a transfer. Where should the AEMT place the line?

Show the answer and rationale

Correct answer · In the left proximal tibia, away from the bone used for the previous line

A bone that had an intraosseous needle in it within roughly the last twenty four to forty eight hours is off limits. The reason is mechanical: the old hole is still there, so fluid you push into the marrow leaks back out through the previous tract instead of reaching the circulation, and it collects in the tissue around the bone. Notice what the contraindication actually names. It is the bone, not the puncture site, so moving a few centimeters down the same tibia does not escape it. The fix for any intraosseous contraindication is the same one: go somewhere else, most often the opposite limb. That principle covers the whole list, which is a fracture in that bone, a fracture in the bone proximal to it, infection or burn or an open wound over the site, a prosthetic joint or other orthopedic hardware at the site, unidentifiable landmarks, and a bone disease that compromises the cortex.

Why the others are wrong

In the right proximal tibia again, since the old tract has already closed over: Tempting because a day feels like a long time and the puncture is small enough that you expect it to seal. Wrong because manufacturer guidance commonly holds that bone off limits for roughly twenty four to forty eight hours, and yesterday afternoon sits well inside that window.

In the right distal tibia, below the previous site in the same bone: Tempting because the distal tibia is a real alternative site and you have put visible distance between the two punctures. Wrong because the contraindication names the bone, and the distal tibia is the same bone, so the old tract is still open upstream of your new needle.

Back to peripheral attempts, since a previous line rules out both legs: Tempting because it takes the conservative path and avoids using a bone you were warned about. Wrong because only one bone is compromised, the other leg is available, and a child in septic shock needs volume rather than more attempts at veins that have already failed.

Question 7 of 10

An AEMT has seated an intraosseous needle in the proximal tibia of an adult in cardiac arrest. The needle stands upright without support and no marrow returns on aspiration. A pressure bag is attached and the fluid does not run. What should the AEMT do first?

Show the answer and rationale

Correct answer · Push a rapid 10 mL saline flush through the catheter

The marrow is a network of sinusoids packed with fat and bone, not an open pipe, and it will not accept flow until you open it. That is what the flush does, and it is mandatory rather than optional: five to ten milliliters in an adult, two to five in a child. Fluid that refuses to run before a flush tells you almost nothing about placement. The findings that do tell you something are already in front of you. The needle standing upright without support is a good sign, and the absence of marrow on aspiration is not a bad one, because plenty of correctly placed needles give you nothing back. The finding that would tell you the needle is wrong is tissue that swells when you flush, so flush it and watch the calf while you do.

Why the others are wrong

Remove the needle and place a second one in the opposite tibia: Tempting because no flow and no marrow together look like a failed placement, and starting over feels decisive. Wrong because you have not yet done the step that makes flow possible, so you would be pulling a needle that may be sitting exactly where it belongs.

Confirm placement by aspirating again with a larger syringe: Tempting because aspirating marrow is a genuine confirmation and a bigger syringe seems like it would pull harder. Wrong because the absence of marrow does not prove failure, and more suction pulls marrow contents against the catheter rather than opening the space.

Raise the pressure bag higher and wait sixty seconds for flow to start: Tempting because intraosseous lines really do need pressure, and you have correctly recognized that gravity alone will not move this fluid. Wrong because pressure against an unflushed marrow space still meets a closed network, so the wait buys nothing and costs a minute in an arrest.

Question 8 of 10

An AEMT is 25 minutes into a transport with a 79-year-old patient who has a history of heart failure and received fluid for dehydration. The patient is now short of breath and sitting forward, with crackles at both bases and distended neck veins. The intravenous site in the patient's hand looks and feels normal, and the line flows freely. What should the AEMT do?

Show the answer and rationale

Correct answer · Stop the infusion, sit the patient upright, and titrate oxygen to the patient's saturation

The normal looking site is the finding that tells you where to look. Infiltration shows up at the line, and an air embolism follows a connection coming loose. Here the line is fine and the patient is the problem, which points at circulatory overload: fluid going in faster than a compromised heart can move it, backing up into the lungs. The picture is the one in front of you, dyspnea with crackles in both bases and distended neck veins, with the site itself looking completely normal. Management is to stop the fluid that is causing it, sit the patient upright so gravity helps the fluid settle away from the upper lungs and the breathing muscles can work, give oxygen titrated to the saturation, and watch the patient closely. Note how that positioning runs opposite to the head down, left side position used for a suspected air embolism, which is one more reason to decide which complication you are looking at before you move anybody.

Why the others are wrong

Remove the catheter and place a new line in the other arm: Tempting because a new line in a fresh site is the answer to several intravenous problems and it feels like decisive action. Wrong because the catheter is working exactly as intended, and replacing it gives you a new way to deliver the fluid that is already harming the patient.

Clamp the tubing and place the patient left side down with the head lowered: Tempting because that position is a real and correct maneuver, and sudden dyspnea with chest discomfort on a running line does raise air embolism. Wrong because an air embolism follows a loose connection or an unprimed line rather than a steady infusion, and putting a patient in pulmonary edema head down floods the upper lungs.

Continue the fluid at a slower rate and reassess the patient's lungs in ten minutes: Tempting because slowing rather than stopping feels cautious, and it keeps a route open for a patient who came in dehydrated. Wrong on three counts that have nothing to do with the rate: it leaves the patient flat instead of upright, it gives no oxygen to a patient who is short of breath, and it spends ten more minutes before the next look at someone who is getting worse now.

Question 9 of 10

Four minutes after return of spontaneous circulation, an adult has a pulse and a blood pressure of 104/62 with a supraglottic airway in place. The provider at the head is squeezing the bag about 20 times a minute, and the end tidal carbon dioxide reads 24 mmHg. What should the AEMT do?

Show the answer and rationale

Correct answer · Slow to one breath every 6 seconds, holding the end tidal value at 35 to 40 mmHg

Hyperventilating a patient who has just regained a pulse is the most common error at this point in a resuscitation, and it does three separate kinds of harm. It raises pressure inside the chest, which cuts the blood returning to the heart in a patient whose circulation is already fragile. It drops the carbon dioxide low enough to constrict cerebral vessels, which is the last thing a brain that has just been without blood flow needs. It also makes the capnography number unreadable as a perfusion measure, because the value falls for reasons that have nothing to do with blood flow. The target for an adult is 10 breaths a minute, one every 6 seconds, with capnography held at 35 to 40 mmHg. Twenty a minute is double that, and the value of 24 is telling you so. Oxygen is titrated separately, to a saturation of 94 to 99 percent.

Why the others are wrong

Continue at the current rate and titrate oxygen to a saturation of 94 to 99 percent instead: Tempting because the oxygen target is real and titrating it is genuinely part of post arrest care. Wrong because it leaves the rate at double what it should be, and the ventilation rate is the problem the capnography number is pointing at.

Slow to one breath every 10 seconds until the end tidal carbon dioxide hits 45 mmHg: Tempting because it correctly recognizes that the rate is too fast and moves in the right direction. Wrong because one breath every 10 seconds is 6 a minute, which undershoots the target, and chasing a value of 45 aims above the 35 to 40 mmHg band.

Increase the tidal volume so that each breath moves more air at the same rate: Tempting because moving more air per breath sounds like a way to ventilate better rather than faster. Wrong because larger volumes at an already excessive rate raise pressure in the chest even further, and each breath should go in only until chest rise begins.

Question 10 of 10

An AEMT is running the resuscitation of a 63-year-old patient in cardiac arrest and is supervising rather than performing a task. Compressions stopped for 25 seconds while a partner started an intravenous line in the forearm, and stopped again for 20 seconds at the last rhythm check while two providers discussed the tracing. Which action is most appropriate?

Show the answer and rationale

Correct answer · Keep compressions going and hold every pause under 10 seconds

Almost everything that improves survival in a cardiac arrest runs through one number: the fraction of the resuscitation during which someone is actually compressing the chest. Coronary perfusion pressure builds over the first several compressions of a cycle and collapses within seconds of stopping, so a pause does not merely cost the seconds on the clock. It costs the pressure that had been built, and the next round has to rebuild it from nothing. That is why the standard holds any interruption under 10 seconds, and why the tasks that used to justify a pause no longer do. An intravenous or intraosseous line is started with compressions running: the limb is steadied and the provider works around the motion. A rhythm check is a look and a decision, not a discussion. Two pauses of 25 and 20 seconds in one resuscitation are not two small delays: together they are most of a minute during which this patient had no circulation at all.

Why the others are wrong

Pause compressions for each task so it can be completed cleanly: How cleanly a task goes is not the outcome being optimized. Vascular access and rhythm checks are performed around continuing compressions precisely because the compressions are what is keeping the brain perfused.

Delay vascular access until return of spontaneous circulation: Vascular access is one of the things the AEMT level adds to a resuscitation, and delaying it until circulation returns removes the route for protocol-authorized medication and fluids. The fix is to obtain it without stopping compressions, not to skip it.

Lengthen the rhythm check so the tracing can be studied carefully: A longer look at the tracing does not change the decision, which is only whether the rhythm is shockable. Extending the check trades certainty the crew already has for perfusion the patient cannot spare.

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