ATLS Airway and Ventilatory Management 3 — Questions and Answers
Question 1: In trauma airway management, what is the most important reason for preoxygenation before rapid sequence intubation?
- To assess the patient's respiratory reserve
- To create an oxygen reservoir that extends the safe apnea period (Correct answer)
- To improve visualization during laryngoscopy
- To prevent gastric distension
Correct answer: To create an oxygen reservoir that extends the safe apnea period
Preoxygenation replaces nitrogen in the functional residual capacity with oxygen, creating a reservoir that allows 3-5 minutes of safe apnea time.
Preoxygenation with 100% FiO2 denitrogenates the functional residual capacity, replacing nitrogen with oxygen. This reservoir is gradually absorbed during apnea. Trauma patients often have reduced FRC, significantly shortening this window.
Question 2: A patient with severe maxillofacial trauma and active oropharyngeal hemorrhage cannot be intubated orally. Bag-valve-mask is ineffective. What is the next best step?
- Attempt nasotracheal intubation
- Perform surgical cricothyroidotomy (Correct answer)
- Insert a laryngeal mask airway
- Apply direct pressure and reattempt oral intubation
Correct answer: Perform surgical cricothyroidotomy
In a CICO scenario with massive facial trauma, surgical cricothyroidotomy provides a definitive airway below the level of obstruction.
Nasotracheal intubation is contraindicated with suspected midface fractures. Supraglottic devices like LMA are unlikely to seal effectively with distorted anatomy. Surgical cricothyroidotomy bypasses the upper airway entirely.
Question 3: After intubation, a trauma patient's oxygen saturation drops and breath sounds are heard only on the right side. What is the most likely cause?
- Left tension pneumothorax
- Right mainstem bronchus intubation (Correct answer)
- Esophageal intubation
- Right-sided hemothorax
Correct answer: Right mainstem bronchus intubation
Unilateral right-sided breath sounds after intubation most commonly indicates right mainstem bronchus intubation.
Right mainstem bronchus intubation occurs when the ETT is advanced past the carina into the right bronchus, which branches at a less acute angle. Treatment: withdraw the tube 2-3 cm and reassess.
Question 4: Which medication combination is most commonly used for rapid sequence intubation in the trauma setting?
- Midazolam and succinylcholine
- Etomidate and succinylcholine (Correct answer)
- Propofol and rocuronium
- Ketamine and vecuronium
Correct answer: Etomidate and succinylcholine
Etomidate provides rapid onset sedation with minimal hemodynamic effects, and succinylcholine provides rapid-onset, short-duration paralysis.
Etomidate (0.3 mg/kg) causes minimal hemodynamic depression compared to propofol. Succinylcholine (1-1.5 mg/kg) provides the fastest onset and shortest duration of any neuromuscular blocker.
Question 5: A patient with a suspected basilar skull fracture requires emergency airway management. Which approach is contraindicated?
- Orotracheal intubation with RSI
- Nasotracheal intubation (Correct answer)
- Surgical cricothyroidotomy
- Video-assisted laryngoscopy
Correct answer: Nasotracheal intubation
Nasotracheal intubation is contraindicated in patients with suspected basilar skull fractures due to the risk of intracranial placement.
Basilar skull fracture signs include raccoon eyes, Battle's sign, CSF rhinorrhea or otorrhea, and hemotympanum. The cribriform plate may be fractured, creating a pathway for nasally placed tubes to enter the intracranial space.
Question 6: What is the recommended method to confirm correct endotracheal tube placement in the trauma setting?
- Auscultation of bilateral breath sounds alone
- Chest X-ray as the sole method
- End-tidal CO2 detection combined with clinical assessment (Correct answer)
- Pulse oximetry response within 2 minutes
Correct answer: End-tidal CO2 detection combined with clinical assessment
End-tidal CO2 combined with clinical assessment is the most reliable method to confirm tracheal placement.
ATLS recommends confirmation using multiple methods. End-tidal CO2 detection is the most reliable objective measure. Waveform capnography is preferred. Clinical assessment includes bilateral breath sounds, chest rise, and absence of epigastric gurgling.
ATLS Airway and Ventilatory Management 3
In trauma airway management, what is the most important reason for preoxygenation before rapid sequence intubation?