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NREMT — Paramedic / FP-C
Paramedic RSI & Failed Airway Review (Drug-Assisted Airway Management)
Rapid sequence intubation — drug-assisted airway management — is tested less as a procedure and more as a risk-management system: preparation, physiologic optimization, a plan for failure written before the first attempt, and the discipline to place an oxygenating rescue device instead of repeating a failing laryngoscopy. Agencies vary in scope; everything here defers to your local protocols and medical director.
Exams (and morbidity reviews) concentrate on the same three killers: hypoxemia, hypotension, and acidosis — the 'HOp killers.' Candidates who optimize physiology before pushing drugs, and who treat first-pass success as something engineered rather than hoped for, answer these questions correctly almost automatically.
Before the drugs: preparation and physiologic optimization
Preparation is checklist territory: suction on and tested, BVM with PEEP capability, working laryngoscope plus backup blade/device (video where available), tube with bougie ready, rescue supraglottic airway out of its package, surgical kit located, monitors (continuous waveform capnography mandatory), drugs drawn and labeled per protocol, roles assigned, and the failure plan spoken aloud ('if attempt one fails, we place the SGA and bag'). Assess for predicted difficulty (anatomy, obesity, trauma, secretions) — a predicted-difficult airway with an oxygenating patient may be a 'don't push the drugs' answer.
Preoxygenation: several minutes of high-FiO2 breathing (or a full-volume breath protocol) to build the oxygen reservoir, with apneic oxygenation (nasal cannula left flowing during the attempt) extending safe apnea time. Hemodynamic optimization: induction agents and positive-pressure ventilation both drop blood pressure — a pre-RSI systolic in the basement predicts peri-intubation arrest, so volume/pressor resuscitation per protocol comes first ('resuscitate before you intubate'). Acidosis caution: the severely acidotic patient (DKA, salicylate) compensating with extreme minute ventilation can die during the apneic pause — if RSI is unavoidable, the plan must minimize apnea time and match the ventilator to their compensation. Positioning (ear-to-sternal-notch, ramped in obesity) is free first-pass success.
The attempt, the failure ladder, and the surgical decision
Attempt discipline: optimize everything for the first attempt (positioning, suction — including SALAD-style techniques for contaminated airways, bougie, external laryngeal manipulation); each subsequent laryngoscopy raises complication rates, so something must change between attempts (operator, device, position, adjunct) — repeating the identical attempt is the tested error. Confirm with continuous waveform capnography; secure; reassess with vitals and the DOPE mnemonic for any post-intubation deterioration.
The failed-airway ladder: the moment attempts fail or saturation falls — stop and oxygenate: BVM with adjuncts and two-person technique, then a supraglottic airway, which is a destination, not an admission of defeat (a patient oxygenating on an SGA is a managed airway). The final branch — can't intubate, can't oxygenate: saturation falling despite optimal BVM and SGA → surgical/front-of-neck airway per scope and protocol, decided early, because the lethal pattern in case reviews is delay: repeated laryngoscopies while saturation erodes past recoverable. Exam stems encode this as a falling-SpO2 timeline; the credited answer abandons intubation for oxygenation far sooner than pride wants.
Practice questions with answers & rationales
Q1. Why does the hypotensive septic patient need volume/pressors before RSI drugs, not after?
Answer: Induction agents blunt sympathetic drive and vasodilate; positive-pressure ventilation then raises intrathoracic pressure and cuts venous return. Stacked on existing hypotension, that combination produces peri-intubation arrest — one of the most documented preventable RSI deaths. 'Resuscitate before you intubate': push the pressure up per protocol first, choose hemodynamically gentler induction options per protocol, and have a pressor ready. Exams flag this with a pre-RSI systolic in the 70s–80s; the credited answer fixes physiology before laryngoscopy.
Q2. What is apneic oxygenation, and why does it work?
Answer: Oxygen (typically by nasal cannula) left flowing during the apneic/laryngoscopy phase. Even without breaths, oxygen moves down the airway into the alveoli by mass flow/diffusion — the alveoli keep absorbing O2 faster than CO2 returns, generating a gas-flow gradient — meaningfully extending time-to-desaturation. It costs nothing, stays out of the way, and exam questions reward including it, especially in predicted-difficult or marginal-reserve patients.
Q3. Your first laryngoscopy shows only soft tissue and secretions; SpO2 is 96%. What must change before attempt two — and what if your partner suggests 'same thing, push harder'?
Answer: Something concrete changes: suction the airway thoroughly, improve position (ear-to-sternal-notch), switch blade or to video laryngoscopy, add a bougie, apply external laryngeal manipulation, or change operators. 'Same approach, more force' is the named error — repeated identical attempts trade airway trauma and desaturation for no new information. Also set the abort threshold aloud: at a defined SpO2, you stop and bag. First-pass success is engineered; second passes are redesigned.
Q4. SpO2 falls to 84% during your second attempt. What's the immediate action and the order of the rescue ladder?
Answer: Abort the attempt and oxygenate: two-person BVM with OPA/NPA and PEEP; if BVM ventilation is effective, you've bought time to re-plan. If BVM fails or as the next rung, place the supraglottic airway. If saturation still cannot be maintained — can't intubate, can't oxygenate — it's a surgical airway per scope/protocol, decided promptly. The tested principle: oxygenation outranks tube placement at every rung; patients die of hypoxia, not of 'no ETT.'
Q5. Why is a supraglottic airway considered a success rather than a failure in the modern algorithm?
Answer: Because the goal of airway management is oxygenation and ventilation — not a specific device. An SGA that produces chest rise, good waveform capnography and stable saturation is a managed airway, fully acceptable for transport on most services. The dangerous mindset is treating the SGA as a defeat to be revisited with more laryngoscopy; case reviews and exams both penalize tube fixation. Reassess, secure, ventilate gently, and move.
Q6. Five minutes after intubation, your patient's saturation drops and airway pressures rise. Run the DOPE assessment aloud.
Answer: Displacement — recheck depth, waveform present? (esophageal/dislodged = lose the waveform; mainstem = unilateral sounds); Obstruction — kinked tube, biting, secretions/mucus plug: pass suction; Pneumothorax — unilateral sounds with rising pressures and falling BP suggests tension: decompress per protocol; Equipment — disconnects, valve failures, oxygen supply: bag by hand to feel compliance and bypass the circuit. Hand-bagging while running DOPE is the universal first move: it tests and treats simultaneously.
Q7. A severely acidotic DKA patient breathing 40/min 'needs a tube for fatigue.' What's the special danger, and what must the plan include?
Answer: Her extreme minute ventilation is the compensation holding pH up; the apneic interval plus a 'normal' post-intubation vent rate removes it, CO2 climbs, pH crashes, and arrest follows. If intubation is truly necessary: maximize pre-oxygenation, minimize apnea (most-experienced operator, first-pass plan), consider techniques that preserve spontaneous ventilation per protocol, and ventilate post-tube at the high minute ventilation she was generating herself, guided by capnography. The exam point: matching the ventilator to compensatory physiology is part of the airway decision.
Common mistakes to avoid
- Pushing induction drugs into uncorrected hypotension — peri-intubation arrest is the textbook preventable RSI death.
- Skipping the spoken failure plan and the prepared rescue devices; the SGA still in plastic is the audit finding.
- Repeating identical laryngoscopy attempts while saturation falls — every attempt needs a change.
- Tube fixation: refusing the SGA or delaying the surgical decision while hypoxia accumulates.
- Forgetting apneic oxygenation and positioning — the free interventions that extend safe apnea.
- Post-intubation autopilot: no capnography vigilance, no DOPE drill, and ventilating acidotic patients at 'normal' rates.