NREMT — EMT & Paramedic
NREMT Airway & Ventilation Practice Questions
Airway, respiration and ventilation is the NREMT's signature content area — and its items are built on one merciless principle: an open airway and adequate ventilation outrank everything else you could be doing. If a stem contains gurgling, snoring, apnea, or inadequate breathing, the correct answer almost always lives in the airway, no matter what shiny distractors surround it.
The other testable core is the difference between oxygenation (getting O2 into the blood — a saturation problem) and ventilation (moving air and clearing CO2 — a rate/depth problem). Patients can fail either one independently, and the exam writes stems specifically to see whether you pick the matching fix.
Adjuncts, suction, and positioning — the EMT bread and butter
OPA: sized corner of mouth to earlobe/angle of jaw; only for patients without a gag reflex; inserted inverted and rotated (adults) or right-side-up with a tongue depressor (pediatrics). Gagging on insertion → remove it, consider an NPA. NPA: sized nostril to earlobe; tolerated by patients with a gag; lubricated, bevel toward the septum; cautioned/avoided with suspected basilar skull fracture (raccoon eyes, Battle's sign, CSF drainage). Suction: gurgling means suction now — before ventilating; suction on withdrawal, limiting each pass (commonly ~10 seconds adults, less for children/infants), because suction removes oxygen along with fluid.
Positioning and maneuvers: head-tilt chin-lift for medical patients; jaw thrust when spinal injury is suspected — and if the jaw thrust fails to open the airway, the exam expects you to accept a head-tilt (airway beats spine in the hierarchy). Recovery position for breathing, unresponsive, non-trauma patients without you available to monitor continuously.
Ventilation decisions: rates, volumes, and when to take over
When to assist: respiratory rates outside roughly 8–24 with signs of inadequacy (shallow depth, altered mentation, accessory muscle use, cyanosis) mean the patient needs assisted ventilation, not just a non-rebreather — the NRB requires the patient to do the work, and a failing patient can't. BVM technique: two-person technique preferred (one seals with two hands, one squeezes), volume just enough for visible chest rise over about 1 second, adult assisted rate roughly every 5–6 seconds (10–12/min); avoid hyperventilation — it raises intrathoracic pressure, reduces venous return, and gastric insufflation invites vomiting. With an advanced airway in cardiac arrest: continuous compressions with a breath every 6 seconds.
Oxygenation vs ventilation in stems: the COPD patient breathing 28/min with SpO2 84% has an oxygenation problem — give oxygen titrated up; the overdose patient breathing 6/min and shallow has a ventilation problem — bag him; the anxious hyperventilator has neither — coach. Capnography (medic level) makes this concrete: EtCO2 climbs with hypoventilation, falls with hyperventilation and with falling perfusion; waveform shark-fins with bronchospasm. CPAP earns its own pattern: the awake, hypertensive, severely dyspneic CHF patient who can follow commands and protect their airway — contraindicated in apnea, hypotension, vomiting, or inability to cooperate.
Practice questions with answers & rationales
Q1. You hear gurgling in an unresponsive patient as you prepare to ventilate. What's your immediate action?
Answer: Suction the airway — before any ventilation. Gurgling is fluid in the upper airway; bagging first pushes that fluid toward the lungs (aspiration). Suction on withdrawal, keep the pass brief (about 10 seconds in adults), then reassess and ventilate. 'Gurgling = suction now' is one of the few absolute reflexes the exam rewards every time.
Q2. Your unresponsive medical patient accepts an OPA without gagging. What does that tell you, and what does it not tell you?
Answer: Tolerating an OPA confirms the gag reflex is absent — the patient cannot protect their own airway, and you must keep managing it. It does not mean ventilation is adequate: rate and depth still need assessment, and the OPA only holds the tongue off the posterior pharynx. The follow-up logic (is he breathing adequately? if not, BVM) is usually the very next exam question.
Q3. A patient has raccoon eyes and clear fluid from the ears after a fall, and he's snoring with a gag reflex intact. Which adjunct, if any?
Answer: Not an NPA — the presentation suggests basilar skull fracture, and the NPA is cautioned/contraindicated. He gags, so no OPA. The answer: manual positioning — jaw thrust (trauma) — and continuous readiness to suction, with assisted ventilation if breathing is inadequate. The exam wants you to remember adjuncts are conveniences; manual airway management is the fallback that's never contraindicated.
Q4. An overdose patient breathes 6 times per minute, shallow, SpO2 86%. Non-rebreather or BVM?
Answer: BVM — this is a ventilation failure, not just an oxygenation problem. An NRB at any flow rate depends on the patient generating adequate tidal volume, which 6-and-shallow does not. Assist at roughly one breath every 5–6 seconds with just enough volume for chest rise, with an adjunct placed as tolerated. Choosing a passive oxygen device for an inadequately breathing patient is the most reliably wrong answer in this content area.
Q5. Why is hyperventilating a patient with a BVM harmful?
Answer: Three mechanisms: it raises intrathoracic pressure and reduces venous return — dropping cardiac output exactly when you need it (worst in arrest and hypovolemia); excess rate/volume blows off CO2, causing cerebral vasoconstriction (dangerous in head injury); and forceful bagging insufflates the stomach, promoting vomiting and aspiration. The exam encodes this as: ventilate at the standard rate with just-visible chest rise — more is worse.
Q6. Your CHF patient is awake, severely dyspneic, hypertensive, with crackles and SpO2 85%. Best ventilation strategy?
Answer: CPAP (with protocol authorization): it splints alveoli open, drives fluid back out of the alveolar space, reduces work of breathing, and frequently prevents intubation. The qualifying checklist is the testable part: awake and able to follow commands, adequate blood pressure, breathing spontaneously, no vomiting/airway compromise. If he tires, becomes hypotensive, or his mentation falls — escalate to assisted BVM ventilation.
Q7. (Paramedic) After intubation, your EtCO2 reads 12 mmHg with a good waveform during CPR. What does that number tell you?
Answer: It reflects perfusion: with ventilation constant, low EtCO2 during CPR indicates poor pulmonary blood flow — i.e., compressions need improving (depth, rate, recoil, minimal pauses, rotate compressors). A sudden sustained rise toward normal suggests ROSC. The exam's pattern: EtCO2 is a ventilation monitor and a circulation monitor — interpret it against what's being held constant.
Common mistakes to avoid
- Bagging through gurgling instead of suctioning first.
- Sizing or using an OPA in a patient with a gag reflex, or an NPA with basilar-skull-fracture signs.
- Choosing a non-rebreather for a patient whose rate/depth is inadequate — passive devices need adequate spontaneous ventilation.
- Squeezing the bag hard and fast: hyperventilation drops cardiac output, alkalizes the brain, and fills the stomach.
- Forgetting the with-advanced-airway arrest pattern: continuous compressions plus one breath every 6 seconds — no 30:2 pause.
- Putting CPAP on the apneic, hypotensive, or vomiting patient — the qualifying criteria are the exam question.