CFRN EXAM WITH QUESTIONS AND ANSWERS WITH COMPLETE
SOLUTIONS | 2026/2027 LATEST UPDATE | GRADED A+
Applied gas laws: bends, staggers, chokes, creeps. Decompression sickness (DCS) -
CORRECT|ANSWER
Henry's law. Most common DCS are the bends- shoulder and joint pain. Staggers= brain/cns, chokes=
resp, creeps= skin.
AGE -
CORRECT|ANSWER
Atrial Gas Emboli- VQ mismatch, position on L site to help trap air in the apex of the ventricle and
prevent it from reaching the ling circulation. Admin 100% O2
Applied gas Laws: cellular gas exchange, diffusion -
CORRECT|ANSWER
Graham's law
Death from crush injury due to? Complications of crush injury? -
CORRECT|ANSWER
Death due to reperfusion injury, rhabdo, rf. complications: DIC, compartment syndrome, rf, hyperk
Compartment syndrome- fasciotomy -
CORRECT|ANSWER
Fasciotomy required if pressures exceed 35 mmhg and must be performed within 6 hrs of injury
Atrial waveform waves -
CORRECT|ANSWER
A waves= rise in atrial pressure as a result of atrial contraction
C waves= not always visible on the tracing, rise in atrial pressure with closure of the AV valves
(tricuspid and mitral)
V wave= rise in atrial pressure as it refills during ventricular contractions
,Normal cvp, co, ci, pa systolic/diastolic, wedge (pawp, pcwp), svr -
CORRECT|ANSWER
Normal cvp=2-6
co= sv x hr (4-8l/min)
Ci = 2.5-4.3
Pas/pad= 15-25/8-15
Pawp 8-12
Svr= 800-1200 dynes/sec/cm5
Ballistics and firearms -
CORRECT|ANSWER
Low energy: ice picks, knives
Medium energy: handguns
High energy: hunting rifles (cause most severe tissue damage cavitation)
Tumbling, yaw -
CORRECT|ANSWER
Tumbling: rotation on 360 degree axis (greater tissue damage)
Yaw: deviation up to 90 degrees from straight path
Camts
1.Med director not req to...
2.Intubation req
3.Live intubation req during training
4.Specialty team response time -
CORRECT|ANSWER
1. Live in the same state
2. Quarterly
3. 5
4. 45 min
, Applied gas laws: bp cuff, ett cuff, mast pressure and volume -
CORRECT|ANSWER
Boyles law. Iabp purges w ascent/descent
Camts
1. Pilot area orientation day/night
2. Helipad required to have
3. Fixes wing twin engine time
4. Ambulance fuel requirement
5. elt set off at
6. Uniform fit -
CORRECT|ANSWER
1. 5hrs day /2hrs night
2. 2 paths, security, wind direction indicator, perimeter lighting
3. 500 hrs
4. 175 miles
5. 4Gs
6. 1/4 in fm body
Pao2, Sao2, bariobariatrauma -
CORRECT|ANSWER
PaO2: plasma (measured as pressure)
SaO2: hemoglobin, (measured as %)
Bariobariatrauma: build up nitrogen in adipose tissue, nitrogen release in obese pts, admin hi flow o2
15 min prior to lift off to wash out nitrogen
Normal peds sbp?
When does the sbp drop? -
CORRECT|ANSWER
Neonate >60
Infant <1yr sbp>70
1-10 yrs 70+2xage
SOLUTIONS | 2026/2027 LATEST UPDATE | GRADED A+
Applied gas laws: bends, staggers, chokes, creeps. Decompression sickness (DCS) -
CORRECT|ANSWER
Henry's law. Most common DCS are the bends- shoulder and joint pain. Staggers= brain/cns, chokes=
resp, creeps= skin.
AGE -
CORRECT|ANSWER
Atrial Gas Emboli- VQ mismatch, position on L site to help trap air in the apex of the ventricle and
prevent it from reaching the ling circulation. Admin 100% O2
Applied gas Laws: cellular gas exchange, diffusion -
CORRECT|ANSWER
Graham's law
Death from crush injury due to? Complications of crush injury? -
CORRECT|ANSWER
Death due to reperfusion injury, rhabdo, rf. complications: DIC, compartment syndrome, rf, hyperk
Compartment syndrome- fasciotomy -
CORRECT|ANSWER
Fasciotomy required if pressures exceed 35 mmhg and must be performed within 6 hrs of injury
Atrial waveform waves -
CORRECT|ANSWER
A waves= rise in atrial pressure as a result of atrial contraction
C waves= not always visible on the tracing, rise in atrial pressure with closure of the AV valves
(tricuspid and mitral)
V wave= rise in atrial pressure as it refills during ventricular contractions
,Normal cvp, co, ci, pa systolic/diastolic, wedge (pawp, pcwp), svr -
CORRECT|ANSWER
Normal cvp=2-6
co= sv x hr (4-8l/min)
Ci = 2.5-4.3
Pas/pad= 15-25/8-15
Pawp 8-12
Svr= 800-1200 dynes/sec/cm5
Ballistics and firearms -
CORRECT|ANSWER
Low energy: ice picks, knives
Medium energy: handguns
High energy: hunting rifles (cause most severe tissue damage cavitation)
Tumbling, yaw -
CORRECT|ANSWER
Tumbling: rotation on 360 degree axis (greater tissue damage)
Yaw: deviation up to 90 degrees from straight path
Camts
1.Med director not req to...
2.Intubation req
3.Live intubation req during training
4.Specialty team response time -
CORRECT|ANSWER
1. Live in the same state
2. Quarterly
3. 5
4. 45 min
, Applied gas laws: bp cuff, ett cuff, mast pressure and volume -
CORRECT|ANSWER
Boyles law. Iabp purges w ascent/descent
Camts
1. Pilot area orientation day/night
2. Helipad required to have
3. Fixes wing twin engine time
4. Ambulance fuel requirement
5. elt set off at
6. Uniform fit -
CORRECT|ANSWER
1. 5hrs day /2hrs night
2. 2 paths, security, wind direction indicator, perimeter lighting
3. 500 hrs
4. 175 miles
5. 4Gs
6. 1/4 in fm body
Pao2, Sao2, bariobariatrauma -
CORRECT|ANSWER
PaO2: plasma (measured as pressure)
SaO2: hemoglobin, (measured as %)
Bariobariatrauma: build up nitrogen in adipose tissue, nitrogen release in obese pts, admin hi flow o2
15 min prior to lift off to wash out nitrogen
Normal peds sbp?
When does the sbp drop? -
CORRECT|ANSWER
Neonate >60
Infant <1yr sbp>70
1-10 yrs 70+2xage
