17.1 Sepsis

Sepsis on a flight is infection plus failing organs, not a waiting game for a laboratory score. Domain 4.E.3 of the August 2026 Board of Certification for Emergency Nursing (BCEN) Certified Flight Registered Nurse (CFRN) outline tests sepsis as a medical emergency you treat before a long hop. Chapter 9 taught the distributive shock pipe picture—low systemic vascular resistance (SVR) and norepinephrine on the ramp. This section owns the infection, the source, the Surviving Sepsis Campaign (SSC) Hour-1 sequence labeled as guideline teaching, and the destination that can drain or operate.

Sepsis-3 is organ failure plus infection, not a qSOFA statute

Definition versus screen

Sepsis-3 defines sepsis as life-threatening organ dysfunction caused by a dysregulated host response to infection. Septic shock is the subset that stays hypotensive after volume and needs a vasopressor, often with a lactate still above 2 mmol/L. You will not run a full Sequential Organ Failure Assessment (SOFA) in a helicopter. Treat the infected patient whose mentation, lungs, kidneys, or blood pressure have failed.

Quick SOFA (qSOFA)—respiratory rate 22 or more, altered mentation, systolic blood pressure (SBP) 100 mm Hg or less—is a screen, not a definition and not a BCEN statute. A normal qSOFA does not rule sepsis out. Systemic inflammatory response syndrome (SIRS) criteria are older and equally incomplete. Do not withhold antibiotics because a sending nurse says the qSOFA is only one. Fever is often absent in the elderly and the neutropenic; hypothermia is worse. A falling end-tidal carbon dioxide (ETCO2) with mottling means the warm-shock phase is over.

Hour-1 bundle as SSC-style teaching

Label this sequence as SSC-style teaching, not BCEN law:

• Draw blood cultures if they will not delay the first antimicrobial dose. Two sets are ideal; ten minutes of delay on a dying patient is not.
• Give broad-spectrum antibiotics matched to the likely source before a long hop if they have not already been given. Write the drug, dose, and clock time.
• Measure lactate if you carry it. A rising lactate after takeoff is a reason to reassess source, volume, and the pressor rate.
• Start crystalloid for sepsis-induced hypoperfusion. SSC still discusses 30 mL/kg as a starting point—guideline teaching, not a reason to drown a failing right ventricle (RV) or an anuric lung (section 17.3). Reassess mean arterial pressure (MAP) and lungs after each bolus.
• If the patient remains hypotensive after reasonable volume, start norepinephrine. Do not withhold the pressor to finish a textbook liter count while the aircraft is lifting.

Source first, then the pad that matches it

Name the source out loud. The antibiotic and the receiving room follow that sentence.

Meningococcemia can ruin a crew's afternoon. The 2026 outline removed infection control as a standalone lecture. That is not permission to cough into an open cockpit. Use personal protective equipment (PPE) that fits a small cabin: mask the patient if they can tolerate it, gloves and eye protection for suction, and tell the receiving pad you are bringing a meningococcal picture. Crew prophylaxis is an occupational-health conversation after the flight, not a reason to refuse the transport.

Norepinephrine first, steroids only when refractory, glucose as a trend

Norepinephrine is the first pressor for septic shock—the same first-line drug Chapter 9 taught. Add vasopressin as a second agent per protocol if doses climb. Epinephrine is a later add when the squeeze fades. Dopamine is no longer first-line.

Corticosteroids—usually intravenous (IV) hydrocortisone—belong only in refractory septic shock after fluids and a pressor have failed. They are not a boarding ritual and not a substitute for source control.

Glucose control means avoid hypoglycemia and extreme hyperglycemia. SSC-style teaching targets a moderate range in critically ill adults (often discussed near 144–180 mg/dL). That range is guideline teaching, not a BCEN statute. Check a fingerstick before you blame sepsis for every mentation change.

Cabin rules: antibiotics before the hop, isolation as practical, destination for source

A ninety-minute fixed-wing leg is long enough for an untreated source to declare itself. If antibiotics have not been given, start them on the ramp. If cultures are sitting on the counter and the first dose is mixed, draw the cultures. If the first dose is ready and the cultures are not, give the drug.

Practical isolation in a two-litter cabin:

• Seat the crew upwind of suction when the airframe allows.
• Use the highest-efficiency mask your program stocks for a coughing pneumonia or a meningococcal rash.
• Bag infectious linen; hand off first-antibiotic time, culture status, last lactate, pressor dose, and suspected source.

Destination is source control. A perforated viscus, an obstructed biliary tree, a drainable abscess, and necrotizing soft tissue need IR or an OR, not a clinic that can only hang another bag. Raise FiO2 or request a lower cabin if Dalton's law is stealing oxygen from a pneumonic lung.

CFRN practice bankPractice questions with detailed explanations