Free CFRN Exam Questions That Helps Candidates Pass

Comprehensive and Detailed Explanation:

The correct answer is A because vertebral artery dissection can occur following cervical trauma or mechanical stress and may produce posterior circulation neurological symptoms.

An arterial dissection develops when injury to the vessel wall allows blood to enter its layers, potentially creating an intramural hematoma.

This may narrow the arterial lumen, reduce cerebral blood flow, or promote thrombus formation and embolization.

Clinical manifestations may include sudden neck pain, headache, dizziness, diplopia, ataxia, dysarthria, and other brainstem or cerebellar symptoms.

Option B does not explain the focal neurological abnormalities. Option C is inconsistent with the acute vascular presentation. Option D fails to account for the associated neurological deficits.

The flight nurse should perform repeated neurological assessments and monitor airway protection, swallowing ability, oxygenation, and blood pressure.

Vascular imaging, such as computed tomography angiography or magnetic resonance angiography, may confirm the diagnosis.

Treatment depends on the presence and severity of ischemic stroke, vascular findings, and bleeding risks.

Urgent transfer to a stroke-capable center is appropriate.

CFRN examination relevance: Evaluates cervical artery dissection, posterior circulation stroke, and neurological transport assessment.

Comprehensive and Detailed Explanation:

The correct answer is D because external ventricular drains require careful management to prevent unintended cerebrospinal fluid drainage and inaccurate intracranial pressure measurements.

An EVD provides access to the ventricular system for cerebrospinal fluid drainage and, depending on configuration, intracranial pressure monitoring.

The drainage system is typically leveled to a prescribed anatomical reference point, commonly the external auditory meatus when used as an approximation of the foramen of Monro.

Changing the patient's position without appropriate adjustment can alter the hydrostatic relationship between the ventricular system and the drainage chamber.

Incorrect positioning may lead to excessive drainage, inadequate drainage, or inaccurate pressure readings.

Option A risks uncontrolled drainage and equipment displacement. Option B does not reliably increase drainage and may instead impede it. Option C removes essential neurosurgical management without authorization.

Before movement, the nurse should follow the treating team's established procedure regarding temporary clamping or drainage management.

After repositioning, the reference level, drainage status, pressure waveform, and neurological condition must be reassessed.

The system should remain secured, sterile, and protected from accidental disconnection.

CFRN examination relevance: Evaluates external ventricular drain management, intracranial pressure monitoring, and neurosurgical transport safety.

Comprehensive and Detailed Explanation:

The correct answer is B because continuous renal replacement therapy depends on reliable vascular access and appropriate extracorporeal circuit flow.

Access-pressure alarms may indicate impaired blood withdrawal caused by catheter kinking, malposition, patient positioning, or intravascular access problems.

The transport team should assess the circuit systematically rather than immediately changing pump speed or disconnecting equipment.

Option A may worsen access-pressure abnormalities. Option C risks unnecessary blood loss and circuit interruption. Option D ignores a clinically significant equipment problem.

The flight nurse should verify catheter securement, tubing connections, and prescribed treatment settings.

Patient movement during loading may alter catheter position or produce tubing compression.

Additional concerns include anticoagulation, circuit clotting, electrolyte balance, and hemodynamic instability.

Any decision regarding circuit disconnection, blood return, or continuation of therapy should follow established device procedures and specialist guidance.

Transport planning should also account for power supply, fluid bags, waste collection, and emergency equipment requirements.

CFRN examination relevance: Evaluates renal replacement therapy transport, extracorporeal circuit alarms, and vascular access troubleshooting.

Comprehensive and Detailed Explanation:

The correct answer is D because the patient has confirmed pulmonary embolism without hemodynamic instability or significant right ventricular dysfunction.

Therapeutic anticoagulation is the principal treatment for most hemodynamically stable patients with acute pulmonary embolism.

Anticoagulants prevent further thrombus propagation and reduce the risk of additional embolic events while the body's endogenous fibrinolytic mechanisms gradually resolve existing thrombus.

Medication selection depends on renal function, bleeding risk, concurrent medications, procedural needs, and overall clinical condition.

During aeromedical transport, intravenous unfractionated heparin may be appropriate in selected patients because of its short half-life and ability to be adjusted or reversed, although other anticoagulant options may be suitable depending on the circumstances.

Option A is incorrect because routine systemic thrombolysis exposes stable patients to unnecessary major bleeding risk. Option B is inappropriate because normotension does not eliminate the need for anticoagulation. Option C is reserved for selected high-risk or otherwise complicated cases.

The flight nurse should monitor oxygenation, respiratory effort, blood pressure, cardiac rhythm, and signs of right ventricular failure.

Sudden hypotension, syncope, or worsening hypoxemia may indicate progression to high-risk pulmonary embolism and require immediate reassessment.

CFRN examination relevance: Evaluates pulmonary embolism risk stratification, anticoagulation, and monitoring of stable thromboembolic disease.

Comprehensive and Detailed Explanation:

The correct answer is B because acute pancreatitis involves inflammation of pancreatic tissue and can produce substantial systemic physiological effects.

Severe pancreatitis may trigger widespread inflammatory responses, increased capillary permeability, third-spacing of fluid, and reduced effective circulating volume.

Patients can develop hypotension, acute kidney injury, respiratory failure, and other forms of organ dysfunction.

Appropriate fluid resuscitation is important, particularly early in the disease course, but excessive fluid administration can worsen tissue edema, pulmonary dysfunction, and abdominal pressure.

Therefore, fluid therapy should be individualized according to hemodynamic response, urine output, renal function, and signs of fluid overload.

Effective analgesia is also important because severe pain can increase sympathetic activity and respiratory workload.

Option A is incorrect because routine prophylactic antibiotics are not recommended for sterile pancreatic necrosis. Antibiotics are indicated when infection is suspected or confirmed. Option C does not treat pancreatic inflammation. Option D ignores possible intravascular depletion.

The flight nurse should monitor blood pressure, oxygenation, pain, glucose, electrolytes, and evidence of evolving organ failure.

Severe cases may require intensive care, nutritional support, and interventions for infected necrosis or other complications.

CFRN examination relevance: Evaluates acute pancreatitis, systemic inflammation, fluid management, and critical-care transport.