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NREMT AEMT Prep Online

Advanced Emergency Medical Technician Certification

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Airway, Respiration & Ventilation105 questions
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Results

Date: 19th Aug 2026Time Taken: 00:00:31

Trauma

Answers Result

You are an AEMT on scene with a trauma patient who has severe respiratory distress, absent breath sounds on the left, jugular venous distention, hypotension, and worsening cyanosis. You suspect tension pneumothorax causing obstructive shock. In your system, needle decompression is performed by paramedics (ALS) , not by AEMTs. What is the most important initial action?

Incorrect

A.Provide immediate oxygenation/ventilation support (assist ventilations as needed), request ALS for decompression, and prepare for rapid transport.
B.Perform needle decompression immediately to relieve the obstruction.
C.Delay movement while completing a full secondary assessment and obtaining baseline vital signs.
D.Start large-volume IV fluids first to normalize blood pressure before requesting ALS or transporting.

After blunt chest trauma, a patient develops severe respiratory distress and falling blood pressure. Breath sounds are markedly decreased on the right, and the right side of the chest appears hyperexpanded. In a trauma patient with suspected tension pneumothorax, which physiologic mechanism most directly causes hypotension and shock?

Correct

A.Increased intrathoracic pressure compresses the great veins, decreasing venous return (preload) to the heart.
B.Direct failure of the affected lung to oxygenate blood is the main cause of shock.
C.Loss of circulating blood volume into the pleural space is the main cause of shock.
D.Fluid accumulation in the pleural space reduces left ventricular contractility and causes shock.

During a busy afternoon in a park, you are assessing a 34-year-old male for respiratory distress. Bright sunlight is shining directly on the pulse oximeter probe, and you suspect it is interfering with the SpO2 reading. Which action is most likely to improve the accuracy of the reading?

Incorrect

A.Shield the probe from sunlight (for example, by covering it with your hand or a towel)
B.Move the probe to a toe to improve accuracy in bright light
C.Massage the finger to warm it and improve perfusion
D.Ask the patient to keep the hand still to reduce motion artifact

Answers Result

Incorrect

A.Provide immediate oxygenation/ventilation support (assist ventilations as needed), request ALS for decompression, and prepare for rapid transport.
B.Perform needle decompression immediately to relieve the obstruction.
C.Delay movement while completing a full secondary assessment and obtaining baseline vital signs.
D.Start large-volume IV fluids first to normalize blood pressure before requesting ALS or transporting.

Tension pneumothorax is a life-threatening cause of obstructive shock because rising intrathoracic pressure impairs venous return and cardiac output. The best initial priority for an AEMT is to manage the airway and breathing (high-flow oxygen and assisted ventilations as needed), while requesting ALS for definitive treatment (decompression in this system) and expediting transport . The choice mentioning “needle decompression” is inappropriate here because the scenario states it is outside AEMT scope in this system. The choices about delaying for additional assessment or attempting to normalize blood pressure with fluids first can waste critical time and do not address the underlying obstruction.

Correct

A.Increased intrathoracic pressure compresses the great veins, decreasing venous return (preload) to the heart.
B.Direct failure of the affected lung to oxygenate blood is the main cause of shock.
C.Loss of circulating blood volume into the pleural space is the main cause of shock.
D.Fluid accumulation in the pleural space reduces left ventricular contractility and causes shock.

In tension pneumothorax, air enters the pleural space and becomes trapped, so intrapleural (intrathoracic) pressure rises with each breath. The elevated pressure shifts and compresses mediastinal structures, especially the vena cava and other great veins. Compression of these veins causes a sharp drop in venous return (preload), leading to decreased stroke volume and reduced cardiac output. This is obstructive shock, which is why hypotension can develop rapidly. The choice mentioning “direct failure of the affected lung to oxygenate blood” describes hypoxemia, which may worsen the patient’s condition but is not the main driver of shock in tension pneumothorax. The choice mentioning “loss of circulating blood volume into the pleural space” is more consistent with a massive hemothorax causing hypovolemic shock. The choice mentioning “fluid accumulation in the pleural space reduces left ventricular contractility” does not match the key hemodynamic problem in tension pneumothorax, which is primarily impaired venous return from increased intrathoracic pressure.

Incorrect

A.Shield the probe from sunlight (for example, by covering it with your hand or a towel)
B.Move the probe to a toe to improve accuracy in bright light
C.Massage the finger to warm it and improve perfusion
D.Ask the patient to keep the hand still to reduce motion artifact

Pulse oximeters use light absorption to estimate oxygen saturation, so strong ambient light (such as direct sunlight) can enter the sensor and interfere with detection of the device’s emitted light. Shielding the probe from sunlight helps reduce this interference and can improve reading accuracy. Moving the probe to a toe does not specifically address ambient light interference. Warming/massaging and minimizing motion can help with poor perfusion or motion artifact, but they do not directly correct an error caused by bright external light striking the sensor.

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Every subject area, covered

Understand why,not only what.

Study anywhere, on any device

Pick up on the web

Take it in your pocket

Every answer shapes what you study next.

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Understand

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Improve

Before you start,you probably want to know…

Are the questions on practice exams like the ones on the real NREMT AEMT?

How is this different from a prep book?

How long do I need to prepare?

Can I study on my phone?

What happens if I don't pass?

Understand why,
not only what.

Before you start,
you probably want to know…