Breathing Assessment and Oxygen Therapy - NREMT EMT Level

1. Asthmatic speaks in two-word sentences; SpO2 91%. Which finding best indicates assisted ventilation is needed?
   Answer: Diminished breath sounds Diminished breath sounds means little air is moving, and in a patient who can only speak two-word sentences, this signals respiratory failure needing assisted ventilation. A pulse oximetry of 91% is commonly corrected with oxygen, while wheezing shows some air movement and a rate of 22 is fast but not inadequate by itself.
2. What oxygen delivery device would be most appropriate for this patient?
   Answer: Non-rebreather mask at 10-15 liters per minute A patient in moderate to severe respiratory distress with accessory muscle use requires high-concentration oxygen via non-rebreather mask at 10-15 LPM. Nasal cannula provides insufficient oxygen concentration. BVM is for inadequate breathing/respiratory failure. Simple face mask is rarely used and provides lower oxygen concentration than needed.
3. When using a bag-valve-mask, what indicates you are providing effective ventilation?
   Answer: Visible chest rise and fall with each ventilation at appropriate rate Effective BVM ventilation is indicated by visible chest rise and fall at the appropriate rate (10-12/min for adults). Option A describes chest compressions, not ventilation. Option C risks hyperventilation. Option D can cause gastric distension and lung injury.
4. Given these breathing assessment findings, what does the paradoxical chest wall movement MOST likely indicate?
   Answer: Flail chest injury requiring immediate high-flow oxygen therapy Paradoxical chest wall movement (inward movement during inspiration, outward during expiration) combined with diminished breath sounds indicates flail chest - multiple rib fractures creating an unstable chest segment. This is a serious injury requiring immediate high-flow oxygen and close monitoring for potential need of ventilatory support. Simple rib fractures don't cause paradoxical movement, anxiety doesn't create this pattern, and cervical spine injury would present with different breathing characteristics.
5. Anxious patient breathes 30 times/min with deep breaths; SpO2 100%. What is the best initial action?
   Answer: Coach slower breathing Your SpO2 is 100%, so oxygen delivery is already adequate; the problem is excessive ventilation. Fast, deep breathing blows off too much CO2, so the best initial move is to coach slower, controlled breathing. High-flow oxygen is tempting because the patient appears distressed, but it does not address hyperventilation and may worsen anxiety.
6. How should you interpret the breathing pattern observed in this diabetic patient?
   Answer: Compensatory hyperventilation attempting to correct metabolic acidosis Deep, rapid breathing (Kussmaul respirations) with fruity breath odor and dehydration suggests diabetic ketoacidosis. The respiratory pattern is compensatory - the body is trying to blow off CO2 to counteract metabolic acidosis. This is appropriate physiologic compensation, not respiratory distress requiring intervention. Interrupting this compensation with assisted ventilation could worsen the acidosis.
7. What is your immediate action regarding this patient's breathing?
   Answer: Begin immediate bag-valve-mask ventilation with high-flow oxygen delivery Agonal respirations are inadequate and indicate impending respiratory arrest requiring immediate BVM ventilation. Nasal cannula (option A) won't help inadequate breathing. Recovery position (option B) is inappropriate for someone needing ventilation assistance. The patient is unconscious and cannot respond to coaching (option D).
8. When assessing breathing quality, which finding indicates inadequate ventilation requiring immediate intervention?
   Answer: Shallow breathing with minimal chest movement and cyanosis around lips Shallow breathing with minimal chest movement and cyanosis indicates inadequate ventilation requiring assisted ventilation. Option A shows normal breathing. Option C shows adequate, possibly slightly deep breathing. Option D shows normal physiologic response to exertion.
9. What is the MOST appropriate oxygen delivery consideration for this COPD patient in respiratory distress?
   Answer: Provide high-flow oxygen via nonrebreather mask despite COPD history due to current distress level Current EMS protocols prioritize treating hypoxemia in COPD patients experiencing acute respiratory distress. The cyanosis, severe tachypnea, and inability to speak in full sentences indicate significant respiratory compromise requiring high-flow oxygen. The concern about suppressing respiratory drive is secondary to preventing hypoxemic organ damage. Withholding adequate oxygen or using inadequate flow rates could be life-threatening in this acute situation.
10. A firefighter with smoke inhalation has dyspnea and SpO2 98%. Which factor best explains this reading?
    Answer: Pulse ox reads CO as oxygen Pulse oximetry only distinguishes saturated from unsaturated hemoglobin; it cannot detect carbon monoxide bound to hemoglobin, which it reads as oxygen. In smoke inhalation, this makes SpO2 appear normal while tissue oxygenation is actually impaired, explaining dyspnea. The tempting error is treating the reading as truly normal, but a normal SpO2 does not rule out carbon monoxide poisoning.
11. What is your most appropriate intervention?
    Answer: Begin assisted ventilation with bag-valve-mask due to inadequate breathing pattern Shallow breathing at 8 breaths per minute indicates inadequate ventilation requiring assisted ventilation with BVM. Simply increasing oxygen flow (option A) or switching devices (option B) won't help inadequate breathing. An unconscious or obtunded patient cannot respond to breathing encouragement (option D).
12. When should you suspect inadequate breathing in a patient who appears to be breathing?
    Answer: Chest rise is barely visible and skin shows cyanotic discoloration Barely visible chest rise with cyanosis indicates inadequate tidal volume and poor oxygenation. Slight tachypnea (option A) may be normal. Short sentences (option B) suggest distress but may still indicate adequate breathing. Anxiety and positioning preference (option D) are compensatory but don't necessarily indicate inadequate breathing.
13. What does this presentation suggest about the patient's breathing status?
    Answer: Patient shows severe respiratory distress requiring high-concentration oxygen therapy Tripod positioning, severe tachypnea, inability to speak full sentences, and fatigue indicate severe respiratory distress requiring immediate high-flow oxygen. This is not adequate breathing (option A), not normal aging (option C), and more serious than anxiety hyperventilation (option D).
14. Based on these breathing assessment findings, what is your MOST appropriate management approach?
    Answer: Keep the child calm, avoid agitation, and transport immediately with high-flow oxygen This presentation suggests epiglottitis - a true airway emergency in children. The key is to avoid any intervention that might agitate the child and cause complete airway obstruction. Examining the throat, forcing position changes, or attempting ventilation could precipitate total obstruction. Keeping the child calm in their position of comfort while providing oxygen and rapid transport is the safest approach.
15. What is the normal respiratory rate range for an adult patient at rest?
    Answer: 12-20 breaths per minute with regular rhythm and adequate depth The normal respiratory rate for an adult is 12-20 breaths per minute. Option A (8-12) is bradypnea and indicates slow breathing. Option C (20-30) is tachypnea and indicates fast breathing. Option D (30-40) represents severe tachypnea requiring immediate intervention.
16. When providing oxygen therapy to this pregnant trauma patient, what is the MOST important consideration?
    Answer: Provide high-flow oxygen as maternal hypoxia poses greater risk to the fetus In pregnant trauma patients, maternal oxygenation is the priority because maternal hypoxia will compromise fetal oxygen delivery more than high-flow oxygen administration. There are no contraindications to high-flow oxygen in pregnancy during emergency situations. Fetal well-being depends on adequate maternal oxygenation and perfusion. Concerns about oxygen toxicity or teratogenic effects are not relevant in acute trauma situations.
17. Based on these breathing assessment findings, what is your PRIMARY concern for this pediatric patient?
    Answer: Thermal injury to upper airway with potential for rapid swelling and obstruction Soot around nose/mouth, singed facial hair, and hoarse voice are classic signs of upper airway thermal injury. In pediatric patients, airway swelling can cause rapid obstruction due to smaller airway diameter. While carbon monoxide and smoke inhalation are concerns, the immediate threat is airway compromise. These physical signs indicate direct heat exposure to the airway, not just smoke exposure or anxiety.
18. A patient exhibits retractions and use of accessory muscles during breathing. This indicates:
    Answer: Increased work of breathing due to respiratory distress or obstruction Retractions and accessory muscle use indicate increased work of breathing, suggesting respiratory distress, obstruction, or inadequate gas exchange. This is never normal (option A), indicates more than adequate ventilation (option C), and is not a proper breathing technique (option D).
19. What is your primary concern regarding this patient's breathing?
    Answer: Potential airway burns and swelling requiring close airway monitoring Hoarse voice and cough after fire exposure suggest airway burns and potential swelling that could rapidly compromise the airway. While CO poisoning (option C) is a concern, airway burns are more immediately life-threatening. Pneumonia (option A) develops later. Anxiety (option D) doesn't explain the hoarse voice.
20. What oxygen delivery method is most appropriate for this patient?
    Answer: Non-rebreather mask at 10-15 liters per minute for chest pain protocol Chest pain patients receive high-concentration oxygen via non-rebreather mask regardless of apparent breathing adequacy, as this may indicate cardiac ischemia. Option A ignores chest pain protocol. Nasal cannula (option B) provides insufficient oxygen for potential cardiac event. BVM (option D) is inappropriate for adequate breathing.

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