CFRN and CTRN are different credentials from different certifying bodies: the CFRN (Certified Flight Registered Nurse) is administered by BCEN, while the CTRN (Certified Transport Registered Nurse) is administered by BCEN. Which one fits depends on your role and career direction — the official eligibility rules and exam outlines (linked below) are the deciding documents. Here is a side-by-side view, plus free practice questions for both so you can feel the difference yourself.
| CFRN | CTRN | |
|---|---|---|
| Full credential name | Certified Flight Registered Nurse | Certified Transport Registered Nurse |
| Certifying body | BCEN | BCEN |
| Practice deck on MedFlashCard | 1000 flashcards | 1050 flashcards |
| Free preview | 30 free CFRN cards | 30 free CTRN cards |
The quickest way to judge which exam fits you is to answer real questions from each. These are genuine cards from both decks:
During a rapid decompression at 35,000 feet, a flight nurse experiences sudden substernal chest pain, dyspnea, and a burning sensation on inspiration. What is this specific manifestation of DCS called?
Show answer →This is The Chokes (Pulmonary DCS). It occurs when nitrogen bubbles, coming out of solution due to Henry's Law, obstruct the pulmonary microvasculature (microemboli). It is a Type II (Serious) DCS manifestation. Symptoms include a non-productive cough, substernal chest pain (worse with deep inspiration), and respiratory distress. BCEN Tip: Differentiate The Chokes (Pulmonary) from The Staggers (Vestibular/Inner Ear) and The Bends (Joints/Musculoskeletal). All require 100% O2 and immediate descent.
A patient presents with sudden onset of stroke-like symptoms immediately upon surfacing from a dive. Is this more likely Decompression Sickness (DCS) or Arterial Gas Embolism (AGE)?
Show answer →This is more likely Arterial Gas Embolism (AGE). AGE symptoms are usually immediate (within 1-15 minutes of surfacing) and involve dramatic, sudden neurological deficits (stroke-like). DCS (Henry's Law) typically has a more gradual onset, with 80% of cases manifesting within 6 hours post-dive. While both require HBOT, AGE is often caused by alveolar rupture due to breath-holding on ascent (Boyle's Law), whereas DCS is caused by nitrogen solubility (Henry's Law). BCEN Tip: Time of onset is the primary differentiator: Immediate = AGE; Delayed = DCS.
A transport nurse is picking up a patient from a scene involving a gunshot wound (GSW) that is now a crime scene. What is the priority for evidence preservation while maintaining the Chain of Custody during transport?
Show answer →Clinical care always takes priority, but evidence must be preserved. Key actions: Do not cut through bullet holes in clothing; bag each hand in paper bags (not plastic, which traps moisture and destroys DNA) if the patient is a suspect or victim of a struggle; and secure any physical evidence (bullets that fall out) in labeled containers. The Chain of Custody requires a continuous, documented record of everyone who had possession of the evidence. BCEN Exam Tip: If you must move evidence to provide care, document the original location and the reason for movement.
A patient sustained a 5% BSA burn from Hydrofluoric (HF) acid. They complain of pain out of proportion to exam and the EKG shows a prolonged QTc. What electrolyte abnormality is expected, and what is the specific treatment?
Show answer →Hypocalcemia (HF acid binds calcium and magnesium, forming insoluble salts). Treatment: Calcium Gluconate (topical gel, IV, or intra-arterial). Strategy: HF is unique because it causes deep tissue destruction and systemic toxicity even with small surface area burns. Watch for cardiac arrhythmias (Torsades de Pointes) due to profound hypocalcemia and hypomagnesemia.
They are independent credentials from BCEN and BCEN respectively; many professionals hold more than one certification. Check each body's eligibility requirements on the official sites linked above.
They test different bodies of knowledge, so difficulty depends on your background. Try free practice questions for both on this page — the one that feels further from your daily work will need more prep time.
Always use the certifying bodies directly: BCEN for the CFRN and BCEN for the CTRN. Links to both official sites are on this page.
Eligibility rules, fees, question counts and passing standards are set by the certifying body and change over time. Always confirm them at the source before you apply or schedule your exam — our flashcards are practice material, not the official handbook.