Free CFRN Exam Questions That Helps Candidates Pass

Comprehensive and Detailed Explanation:

The correct answer is C because sudden cessation of chest tube drainage accompanied by respiratory deterioration may indicate obstruction or malfunction of the drainage system.

Potential causes include tubing kinks, dependent loops, clot formation, compression, or displacement.

When pleural air or fluid can no longer escape effectively, pressure may accumulate and compromise ventilation.

In patients receiving positive-pressure ventilation, obstruction of a chest tube may contribute to recurrent or tension pneumothorax.

The flight nurse should immediately assess respiratory effort, oxygenation, blood pressure, breath sounds, and ventilator mechanics.

The drainage system should be inspected for mechanical problems according to established protocols.

Option A risks worsening pressure accumulation. Option B may remove essential pleural drainage. Option D does not address the likely mechanical complication.

If tension pneumothorax is suspected, immediate intervention must not be delayed for imaging.

The nurse should also assess chest tube connections, collection chamber position, and evidence of an ongoing air leak.

After correction, respiratory status and drainage function should be reassessed.

CFRN examination relevance: Evaluates chest tube obstruction, recurrent pneumothorax, and emergency pleural drainage troubleshooting.

Comprehensive and Detailed Explanation:

The correct answer is D because the patient demonstrates acute hypercapnic respiratory failure with worsening neurological status and inadequate response to noninvasive ventilation.

A markedly elevated PaCO₂ accompanied by acidemia indicates insufficient alveolar ventilation.

Although selected patients with COPD benefit substantially from noninvasive ventilation, deterioration in consciousness, inability to protect the airway, worsening respiratory effort, or persistent severe gas-exchange abnormalities may indicate treatment failure.

Progressive somnolence raises concern for carbon dioxide-related neurological impairment, respiratory muscle fatigue, and loss of airway protection.

Controlled endotracheal intubation should be considered before the patient progresses to complete respiratory arrest.

The flight nurse must anticipate difficult peri-intubation physiology, including the potential for hypotension, dynamic hyperinflation, and auto-PEEP after positive-pressure ventilation begins.

Ventilator management should provide adequate expiratory time and avoid unnecessarily high respiratory rates.

Option A delays escalation despite clinical deterioration. Option B misunderstands the harmful consequences of acute carbon dioxide retention. Option C does not correct inadequate ventilation and may worsen carbon dioxide generation.

After airway establishment, continuous waveform capnography, oxygenation assessment, ventilator pressure monitoring, and arterial blood gas evaluation are important.

CFRN examination relevance: Evaluates hypercapnic respiratory failure, noninvasive ventilation failure, airway decision-making, and invasive ventilation in obstructive lung disease.

Comprehensive and Detailed Explanation:

The correct answer is B because painless vaginal bleeding during the third trimester raises concern for placenta previa, a condition in which placental tissue overlies or approaches the internal cervical opening.

Placenta previa can cause significant maternal hemorrhage, particularly as the cervix begins to change during late pregnancy.

A digital vaginal examination must be avoided until placenta previa has been excluded because manipulation of the cervix may disrupt placental tissue and precipitate severe hemorrhage.

Ultrasonography is the preferred method for determining placental location.

Although the patient is currently relatively stable, significant bleeding may develop rapidly, and maternal compensatory mechanisms can initially obscure the severity of blood loss.

Option A is appropriate because maternal perfusion, blood pressure, heart rate, mental status, and ongoing hemorrhage require continuous assessment.

Option C is appropriate because reliable intravenous access and access to blood products may become necessary if hemorrhage progresses.

Option D is essential because definitive management may require urgent cesarean delivery and advanced maternal resuscitation.

The flight nurse should avoid unnecessary vaginal manipulation, maintain appropriate maternal positioning, assess fetal status when feasible, and communicate the suspected diagnosis to the receiving obstetric team.

Placental abruption is another important cause of antepartum bleeding, but it is more commonly associated with abdominal pain, uterine tenderness, or increased uterine tone.

CFRN examination relevance: Tests third-trimester bleeding, placenta previa, obstetric examination precautions, and maternal transport management.

Comprehensive and Detailed Explanation:

The correct answer is D because central venous catheters require secure fixation and appropriate dressing integrity to reduce the risk of catheter displacement, contamination, and infection.

A loose dressing may permit movement of the catheter and expose the insertion site to environmental microorganisms.

Catheter dislodgement can interrupt essential medication delivery, cause bleeding, or create a potential route for air entry into the venous circulation.

The flight nurse should assess whether the catheter remains appropriately positioned and secured.

Dressing replacement should follow sterile technique and institutional vascular-access protocols.

Option A may abruptly interrupt essential vasopressor treatment. Option B ignores recognized catheter-related risks. Option C does not provide adequate assessment or sterile site protection.

The nurse should also inspect tubing connections, confirm infusion pump settings, and ensure that all catheter lumens are appropriately closed or connected.

During loading and unloading, infusion lines must be positioned to prevent traction or accidental disconnection.

The receiving team should be informed of any concerns regarding catheter integrity or function.

CFRN examination relevance: Evaluates central venous catheter maintenance, infection prevention, and secure vascular access during transport.

Comprehensive and Detailed Explanation:

The correct answer is A because falling from a height and landing on the feet produces substantial axial loading forces transmitted through the lower extremities into the pelvis and spine.

Calcaneal fractures are characteristic injuries associated with this mechanism.

The transmitted force can also cause compression or burst fractures involving the thoracolumbar spine.

A burst fracture may produce retropulsion of bone fragments into the spinal canal and potentially compromise neural structures.

The flight nurse should assess for back pain, spinal tenderness, lower-extremity weakness, sensory abnormalities, and bowel or bladder dysfunction.

However, absence of neurological symptoms does not completely exclude a spinal fracture.

Option B is unrelated to the traumatic mechanism. Option C is an infectious condition rather than a characteristic associated injury. Option D is not a typical consequence of axial loading through the feet.

Appropriate spinal motion precautions should be maintained when clinically indicated.

The nurse should also document distal circulation, sensation, movement, and swelling in both feet.

Definitive imaging and orthopedic or spinal surgical assessment may be required.

CFRN examination relevance: Evaluates traumatic force transmission, associated spinal injuries, and secondary trauma assessment.