Emergency Medicine Book

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Primary Survey Airway Evaluation

Aka: Primary Survey Airway Evaluation, Emergency Airway Management
  1. See Also
    1. Cardiopulmonary Resuscitation
    2. Guidelines for Emergency Cardiovascular Care
    3. Advanced Airway
    4. Intubation
  2. Precautions
    1. Maintaining a patent airway is the most critical first-line step in Resuscitation, without which all else fails
    2. Tongue most commonly obstructs unconscious patient
  3. Evaluation
    1. See Rapid ABC Assessment
    2. Monitor for signs of impending airway compromise
      1. End-Tidal CO2 is a more reliable and earlier marker of impending respiratory failure than Oxygen Saturation
    3. Evaluate for Trauma related airway compromise
      1. Maxillofacial Trauma
      2. Neck Trauma
      3. Laryngeal or tracheal Trauma (e.g. Laryngeal Fracture, Tracheal Laceration)
        1. Hoarseness
        2. Subcutaneous Emphysema
  4. Management
    1. Assume Cervical Spine Injury
      1. Maintain inline Cervical Spine stabilization
      2. Consider SCIWORA in pediatric patients
    2. Airway Suction
      1. Blood
      2. Mucus
      3. Dental fragments
    3. Open Airway
      1. Head Tilt-Chin Lift
      2. Jaw Thrust (if Cervical Spine Injury is suspected)
    4. Maintain Airway
      1. Oropharyngeal Airway
      2. Nasopharyngeal Airway
  5. Pitfalls: Trauma
    1. Advanced Airway
      1. See Advanced Airway for intubation indications
      2. See Rapid Sequence Intubation
      3. Anticipate Difficult Airway (e.g. Lemon Mnemonic)
        1. Be prepared for failed airway with surgical airway backup (Cricothyrotomy)
      4. Elastic Bougie can simplify intubation of a patient with c-Spine Immobilization
      5. Video Laryngoscopy is also very helpful when neck movement is restricted
    2. Cervical Spine Injury
      1. Immobilize c-spine until definitive spine evaluation with C-Spine CT (instead of Cross Table lateral)
      2. Assistant should provide head down, neck inline c-spine stablization during Primary Survey (instead of Cervical Collar)
        1. Provides countertraction as the intubating provider lifts Mandible
        2. Assistant can also help keep mouth wide open
      3. Inline c-spine stabilization during intubation may not prevent movement and may increase Laryngoscope forces
        1. Santoni (2009) Anesthesiology 110(1): 24-31 [PubMed]
        2. Turner (2009) J Trauma 67(1): 61-6 [PubMed]
        3. Manoach (2007) 50(3): 236-45 PMID:17337093 [PubMed]
      4. In-line stabilization significantly prolongs intubation time and decreases first-pass success
        1. Thiboutot (2009) Can J Anaesth 56(6): 412-8 PMID: 19396507 [PubMed]
    3. Airway Compromise
      1. Foreign body in airway (e.g. Loose teeth or dentures)
      2. Facial Fracture (Mandibular Fracture, Maxillofacial Fracture)
      3. Tracheal Fracture or Larynx disruption
      4. Blunt supraclavicular Trauma
      5. Posterior dislocation of the clavicular head
    4. Loss of airway protection
      1. Altered Level of Consciousness
      2. Aspiration of gastric contents
      3. Multisystem Trauma
  6. References
    1. Trauma (and ATLS)
      1. (2008) ATLS Manual, American College of Surgeons
      2. (2012) ATLS Manual, American College of Surgeons
      3. Majoewsky (2012) EMR:RAPC3 2(1): 1-2
    2. Cardiopulmonary Resuscitation Guidelines
      1. http://www.circulationaha.org
      2. (2010) Guidelines for CPR and ECC [PubMed]
      3. (2005) Circulation 112(Suppl 112):IV [PubMed]
      4. (2000) Circulation, 102(Suppl I):86-9 [PubMed]

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