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Cited by 115Airway Management and Intubation TechniquesTracheal and airway disordersTrauma and Emergency Care Studies

Airway Management in Trauma

Open access
Kovacs, George, Sowers, Nicholas·2018·Emergency Medicine Clinics of North America
DOI 10.1016/j.emc.2017.08.006
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Abstract

Airway management in the trauma patient presents numerous unique challenges beyond placement of an endotracheal tube and outcomes are dependent on the provider's ability to anticipate difficulty. Airway management strategies for the care of the polytrauma patient are reviewed, with specific considerations for those presenting with traumatic brain injury, suspected c-spine injury, the contaminated airway, the agitated trauma patient, maxillofacial trauma, and the traumatized airway. An approach to airway management that considers the potential anatomic and physiologic challenges in caring for these complicated trauma patients is presented.

AI snapshot

Written from the paper’s full text.

TL;DR

This review outlines a physiology-first approach to trauma airway management, emphasizing resuscitation before intubation and anticipating anatomic and physiologic difficulty. It covers TBI, suspected cervical spine injury, contaminated airway, agitation, maxillofacial trauma, laryngotracheal injury, awake intubation, RSI, preoxygenation, and front-of-neck airway access.

Key findings

  • Trauma accounts for 20% to 30% of emergency department intubations; 90% of difficult intubations are unanticipated. Cervical spine injuries occur in approximately 2% of the general trauma population and 6% to 8% of patients with head and facial trauma, while secondary neurologic deterioration is rare at 0.03%.
  • Physiologic derangements are common and consequential: postintubation hypotension occurs in 23% to 46% of emergency airway cases, shock index greater than 0.8 identifies particular risk, and combined hypoxemia plus hypotension has an adjusted odds of death double that of either alone. Preintubation oxygen saturation less than 95% risks abrupt desaturation within 90 seconds of apnea.
  • Airway contamination decreases first-attempt intubation success regardless of GlideScope or direct laryngoscopy in a retrospective review of more than 4600 intubations. In 1078 trauma patients intubated for discretionary indications, 62% had a significant head injury on investigation.
  • Primary airway trauma is uncommon, with reported incidence less than 1% (0.4% blunt, 4.5% penetrating), and front-of-neck airway is rare at 0.05% to 1.7% of ED-based intubations. For RSI, induction agent dose should be reduced by at least 50% in hypotension or shock index greater than 0.8, rocuronium less than 1.0 mg/kg is inadequate with 1.2 to 1.6 mg/kg recommended, and ketamine 1 to 1.5 mg/kg may facilitate cooperation.

Methods

  • Narrative clinical review/guidance; no primary study design, dataset, or formal analysis is reported.
  • Synthesizes cited literature and expert opinion into scenario-based management pearls and algorithms for TBI, suspected cervical spine injury, contaminated airway, agitated patient, maxillofacial injuries, traumatized airway, awake intubation, RSI, preoxygenation, and FONA.
  • Main analysis is qualitative synthesis; no quantitative meta-analysis or statistical testing is reported.

Limitations

  • The paper states that prehospital endotracheal intubation data are conflicting, and the Eastern Association for the Surgery of Trauma could reach no conclusion regarding prehospital intubation for traumatic brain injury with or without RSI because of diversity in patient population, airway algorithms, EMS experience, and reporting.
  • The paper states limited published evidence that cervical spine collars and immobilization prevent secondary spinal cord injury, inconsistent literature comparing intubation devices in cervical spine immobilization with no consensus on optimal approach, and limited evidence for FONA that will likely remain limited.
  • Evident from the text: this is a narrative review without a systematic search or formal quality appraisal, and many recommendations are expert- or physiology-based, with some cited evidence from simulation or cadaveric studies.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.1016/j.emc.2017.08.006

Cites

118 of 118 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

66 of 145 cited sources checked · 20 supported · 4 flagged · accuracy not yet measured

  • Premisecitation

    Even in patients with known cervical spine injuries, secondary neurologic deterioration is rare, with a reported incidence of 0.03%.

    “even in patients with known cervical spine injuries, secondary neurologic deterioration is rare, with a reported incidence of 0.03%.33,[37][38][39]”
    Quote in the paperSubstantial claim1 of 4 sources checked
    • cites [33] Manoach, 2007, Manual in-line stabilization for acute airway management of suspected cervical spine injury: historical review and current questions, Ann Emerg Med source
    • cites [37] Durga, 2014, Neurological deterioration during intubation in cervical spine disorders, Indian J Anaesth source

      In “Evidence of Cervical Injury Following Intubation” (page not available), the paper says approximately 5% of patients admitted with traumatic cervical injury deteriorate neurologically, not 0.03%. It separately describes published reports of deterioration associated with intubation as few, but gives no 0.03% incidence for patients with known cervical spine injuries. (LLM, conf=0.88)

      Checked by a reasoning model — may be wrong.

      Experimental — accuracy not yet measured
    • cites [38] Crosby, 2006, Airway management in adults after cervical spine trauma, Anesthesiology source
    • cites [39] Farmer, 1998, Neurologic deterioration after cervical spinal cord injury, J Spinal Disord source
  • Premisecitation

    Patients with mandibular fractures in 2 or more locations may be easier to intubate due to increased mobility of the mandible and attached soft tissues.

    “Although patients with mandibular fractures in 2 or more locations may be easier to intubate due to increased mobility of the mandible and attached soft tissues”
    Quote in the paperNot a substantial claim1 of 2 sources checked
    • cites [64] Bowman-Howard, 2000, Management of the traumatized airway

      Not checked in the free run.

    • cites [66] Krausz, 2009, Maxillofacial trauma patient: coping with the difficult airway, World J Emerg Surg source

      In “Maxillofacial Trauma and Airway Injuries” (page unavailable), the paper says a bilateral anterior mandibular fracture may displace the tongue backward and block the airway. “The Complexity of the situation” describes maxillofacial trauma as often making intubation difficult. The paper does not describe increased mandibular mobility as making these patients easier to intubate. (LLM, conf=0.78)

      Checked by a reasoning model — may be wrong.

      Experimental — accuracy not yet measured
  • Premisecitation

    Complications associated with jet ventilation are unacceptably high.

    “However, recent reviews have shown that complications associated with jet ventilation are unacceptably high and wire-guided approaches are not as easy or successful as once believed.[114][115][116][117]”
    Quote in the paperSubstantial claim3 of 4 sources checked
    • cites [114] Duggan, 2016, Transtracheal jet ventilation in the “can’t intubate can’t oxygenate” emergency: a systematic review, Br J Anaesth source
    • cites [115] Marshall, 2016, Evidence is important: safety considerations for emergency catheter cricothyroidotomy, Acad Emerg Med source

      The opening section acknowledges that catheter oxygenation is inherently risky but says refinements have made complication rates significantly lower. “Evidence of Safety and Need for Ongoing Training” reports few complications when the prescribed technique was used. The paper discusses how to mitigate barotrauma, rather than concluding that complications are unacceptably high. (LLM, conf=0.85)

      Checked by a reasoning model — may be wrong.

      Experimental — accuracy not yet measured
    • cites [116] Cook, 2011, Major complications of airway management in the UK: results of the Fourth National Audit Project of the Royal College of Anaesthetists and the Difficult Airway Society. Part 1: anaesthesia, Br J Anaesth source

      The Emergency surgical airway and Discussion sections report a high failure rate for cannula cricothyroidotomy, but do not identify those attempts as jet ventilation or assess jet-ventilation complications. Searches for “jet ventilation” and “trans-tracheal jet ventilation” found no passage addressing the attributed claim. (LLM, conf=0.70)

      Experimental — accuracy not yet measured
    • cites [117] Langvad, 2013, Emergency cricothyrotomy—a systematic review, Scand J Trauma Resusc Emerg Med source

      The Methods (Types of interventions; page unavailable) describe how a transtracheal catheter can be used with a jet ventilator, but do not assess complications from jet ventilation. A search for jet-ventilation complications, barotrauma, and adverse events found no passage in our copy calling their rate unacceptably high. (LLM, conf=0.76)

      Experimental — accuracy not yet measured
  • Premisecitation

    There is very limited published evidence to support the notion that cervical spine collars and immobilization prevent secondary spinal cord injury.

    “there is very limited published evidence to support the notion that cervical spine collars and immobilization prevent secondary spinal cord injury.28,29”
    Quote in the paperSubstantial claim1 of 2 sources checked
    • cites [28] Kwan, 2001, Spinal immobilisation for trauma patients, Cochrane Database Syst Rev source
    • cites [29] Oteir, 2014, Should suspected cervical spinal cord injuries be immobilised? A systematic review protocol, Inj Prev source
  • Premisecitation

    90% of difficult intubations are unanticipated.

    “with 90% of difficult intubations unanticipated”
    Quote in the paperSubstantial claim1 of 4 sources checked
    • cites [18] Yentis, 2002, Predicting difficult intubation–worthwhile exercise or pointless ritual?, Anaesthesia source
    • cites [19] Nørskov, 2016, Effects of using the simplified airway risk index vs usual airway assessment on unanticipated difficult tracheal intubation—a cluster randomized trial with 64,273 participants, Br J Anaesth source
    • cites [20] Teoh, 2016, Prediction in airway management: what is worthwhile, what is a waste of time and what about the future?, Br J Anaesth source

      The article (pp. 3–5) reports that 89–91% of difficult intubations were unanticipated in an analysis that excluded patients initially assigned an alternative intubation method. It then says that exclusion is inappropriate and favors an analysis in which approximately half of difficult intubations were predicted. The unqualified 90% claim omits that condition and the authors’ preferred interpretation. (LLM, conf=0.88)

      Experimental — accuracy not yet measured
    • cites [21] Vannucci, 2016, Bedside predictors of difficult intubation: a systematic review, Minerva Anestesiol
  • Classified as probably not a substantial claim. 39
  • May combine two claims. 35
  • The quote only partly states this claim. 1

  • Classified as probably not a substantial claim. May combine two claims.

    Premisecitation

    Administering too small a dose (<1.0 mg/kg) of rocuronium, particularly in low-flow states, will result in inadequate intubating conditions and a larger dose is recommended (1.2-1.6 mg/kg).

    “administering too small a dose (<1.0 mg/kg) of rocuronium, particularly in low-flow states, will result in inadequate intubating conditions and a larger dose is recommended (1.2-1.6 mg/kg).101,102”
    Quote in the paperSubstantial claim2 of 2 sources checked
    • cites [101] Tran, 2015, Rocuronium versus succinylcholine for rapid sequence induction intubation, Cochrane Database Syst Rev source

      The Subgroup analysis reports fewer excellent conditions with 0.6–0.7 mg/kg rocuronium than with succinylcholine, but it does not establish that every dose below 1.0 mg/kg produces inadequate conditions. It finds no conclusive evidence that increasing rocuronium doses improves conditions, and the Authors’ conclusions recommend 1 mg/kg when rocuronium is needed—not 1.2–1.6 mg/kg. The cited passages do not address low-flow states. (LLM, conf=0.88)

      Checked by a reasoning model — may be wrong.

      Experimental — accuracy not yet measured
    • cites [102] Welch, 2016, Update: does rocuronium create better intubating conditions than succinylcholine for rapid sequence intubation?, Ann Emerg Med source

      The Commentary (page not provided) says rocuronium dose may affect intubating conditions and reports that succinylcholine produced better conditions at rocuronium doses of 0.6–0.7 mg/kg. It does not say that every dose below 1.0 mg/kg causes inadequate conditions: it found no difference at 0.9–1.0 mg/kg. It does not address low-flow states or recommend 1.2–1.6 mg/kg. (LLM, conf=0.88)

      Experimental — accuracy not yet measured

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    Application of MILS results in the need for an increased applied force during laryngoscopy, which paradoxically may lead to more movement during intubation than occurs without MILS.

    “Another theoretic concern is that application of MILS results in the need for an increased applied force during laryngoscopy, which paradoxically may lead to more movement during intubation than occurs without MILS.40,41”
    Quote in the paperNot a substantial claim1 of 2 sources checked
    • cites [40] Thiboutot, 2009, Effect of manual in-line stabilization of the cervical spine in adults on the rate of difficult orotracheal intubation by direct laryngoscopy: a randomized controlled trial, Can J Anaesth source
    • cites [41] LeGrand, 2007, Craniocervical motion during direct laryngoscopy and orotracheal intubation with the Macintosh and Miller blades: an in vivo cinefluoroscopic study, Anesthesiology source

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    The incidence of c-spine injuries is approximately 2% in the general trauma population.

    “the incidence of c-spine injuries is relatively low (occurring in approximately 2% in the general trauma population”
    Quote in the paperNot a substantial claim1 of 4 sources checked
    • cites [30] Mulligan, 2010, A nationwide review of the associations among cervical spine injuries, head injuries, and facial fractures, J Trauma source
    • cites [31] Dupanovic, 2010, Management of the airway in multitrauma, Curr Opin Anaesthesiol source
    • cites [32] Thompson, 2009, Association of injury mechanism with the risk of cervical spine fractures, CJEM source

      The Characteristics of study subjects section reports that 320 of 17,208 patients (2%) had a clinically important cervical spine injury. The Abstract specifies that these were patients presenting to nine tertiary-care emergency departments after acute blunt trauma to the head or neck, not the general trauma population. The 2% figure is supported, but the claimed population is broader than the study's. (LLM, conf=0.88)

      Experimental — accuracy not yet measured
    • cites [33] Manoach, 2007, Manual in-line stabilization for acute airway management of suspected cervical spine injury: historical review and current questions, Ann Emerg Med source

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    The incidence of c-spine injuries is 6%-8% in patients with head and facial trauma.

    “and 6%-8% in patients with head and facial trauma)”
    Quote in the paperNot a substantial claim1 of 4 sources checked
    • cites [30] Mulligan, 2010, A nationwide review of the associations among cervical spine injuries, head injuries, and facial fractures, J Trauma source
    • cites [31] Dupanovic, 2010, Management of the airway in multitrauma, Curr Opin Anaesthesiol source
    • cites [32] Thompson, 2009, Association of injury mechanism with the risk of cervical spine fractures, CJEM source

      The Characteristics of study subjects section reports cervical spine injury in 320 of 17,208 patients (2%) enrolled after blunt head or neck trauma. Our copy does not report an incidence for patients with head and facial trauma, so it cannot verify the claimed 6%–8% for that group. (LLM, conf=0.72)

      Experimental — accuracy not yet measured
    • cites [33] Manoach, 2007, Manual in-line stabilization for acute airway management of suspected cervical spine injury: historical review and current questions, Ann Emerg Med source

  • May combine two claims.

    Premisecitation

    The Ducanto suction-assisted laryngoscopy airway decontamination (SALAD) approach has gained acceptance as a method to manage the soiled airway, although not studied in a clinical setting.

    “Although not studied in a clinical setting, the Ducanto suction-assisted laryngoscopy airway decontamination (SALAD) approach has gained acceptance as a method to manage the soiled airway.57,58”
    Quote in the paperNot a substantial claim1 of 2 sources checked
    • cites [57] DuCanto, 2017, Novel airway training tool that simulates vomiting: suction-assisted laryngoscopy assisted decontamination (SALAD) system, West J Emerg Med source

      The Introduction describes SALAD as a simulation-based suction approach for managing vomit or blood in the airway, and the Discussion says the study did not evaluate real-world clinical outcomes. The Results report favorable ratings from 40 learners, but do not establish that the approach had gained acceptance as a clinical method for managing soiled airways. Page numbers were not available in our copy. (LLM, conf=0.85)

      Experimental — accuracy not yet measured
    • cites [58] Brainard, 2015, The art of SUCTIONING, JEMS

  • May combine two claims.

    Premisecitation

    Posterior displacement from fractured maxillofacial segments may cause soft tissue collapse and occlude the airway, which may be worsened by the presence of c-spine collar.

    “Posterior displacement from fractured maxillofacial segments may cause soft tissue collapse and occlude the airway, which may be worsened by the presence of c-spine collar.64,65”
    Quote in the paperNot a substantial claim1 of 2 sources checked
    • cites [64] Bowman-Howard, 2000, Management of the traumatized airway

      Not checked in the free run.

    • cites [65] Jose, 2016, Management of maxillofacial trauma in emergency: an update of challenges and controversies, J Emerg Trauma Shock source

  • May combine two claims.

    Premisecitation

    Success with awake intubation is dependent on meticulous airway topicalization, and in general requires an awake and cooperative patient.

    “Success with awake intubation is dependent on meticulous airway topicalization, and in general requires an awake and cooperative patient.72,73”
    Quote in the paperSubstantial claim1 of 2 sources checked
    • cites [72] Higgs, 2016, Airway management in the critically ill: the same, but different, Br J Anaesth source
    • cites [73] Lapinsky, 2015, Endotracheal intubation in the ICU, Crit Care source

      The paper’s Abstract says some agitated patients cannot undergo awake intubation and describes using topical anesthetic or a local anesthetic spray in an awake, breathing patient. It does not say success depends on meticulous topicalization or generally requires a fully awake and cooperative patient; it explicitly describes successful awake intubation in ICU patients whose consciousness may be reduced by illness. (LLM, conf=0.85)

      Experimental — accuracy not yet measured

  • May combine two claims.

    Premisecitation

    Most of the literature comparing DL with VL in the bloody or vomitus-filled airway is simulation-based, and concern exists about the vulnerability of VL camera lens in the contaminated airway.

    “Most of the literature comparing DL with VL in the bloody or vomitus-filled airway is simulation-based, and concern exists about the vulnerability of VL camera lens in the contaminated airway.55,56”
    Quote in the paperSubstantial claim1 of 2 sources checked
    • cites [55] Ohchi, 2016, Evaluation of gum-elastic bougie combined with direct and indirect laryngoscopes in vomitus setting: a randomized simulation trial, Am J Emerg Med source
    • cites [56] Mihara, 2015, Comparison of direct and indirect laryngoscopes in vomitus and hematemesis settings: a randomized simulation trial, Biomed Res Int source

      The Methods describe a manikin simulation using simulated vomitus and blood, and the Discussion reports that the AWS video monitor was severely disturbed by both contaminants. The Conclusion calls for trials in actual patients. These passages support the simulation example and the concern about a contaminated video view, but do not establish that most of the literature is simulation-based or specifically identify the camera lens as the vulnerable component. Page numbers are unavailable in our copy. (LLM, conf=0.87)

      Experimental — accuracy not yet measured

  • May combine two claims.

    Premisecitation

    Literature comparing intubation devices in c-spine immobilized patients has yielded inconsistent findings, and no consensus as to the optimal approach.

    “Literature comparing intubation devices in c-spine immobilized patients has yielded inconsistent findings, and no consensus as to the optimal approach.38,44,45,48,49”
    Quote in the paperSubstantial claim2 of 5 sources checked
    • cites [38] Crosby, 2006, Airway management in adults after cervical spine trauma, Anesthesiology source
    • cites [44] Michailidou, 2015, A comparison of video laryngoscopy to direct laryngoscopy for the emergency intubation of trauma patients, World J Surg source
    • cites [45] Suppan, 2016, Alternative intubation techniques vs Macintosh laryngoscopy in patients with cervical spine immobilization: systematic review and meta-analysis of randomized controlled trials, Br J Anaesth source
    • cites [48] Kleine-Brueggeney, 2016, Evaluation of six videolaryngoscopes in 720 patients with a simulated difficult airway: a multicentre randomized controlled trial, Br J Anaesth source

      The Discussion (page unavailable) says the optimal videolaryngoscope may differ with the circumstances of the difficult airway, supporting the absence of one universally optimal device. But it also says prior studies agree that videolaryngoscopes have higher success rates than the Macintosh laryngoscope, so it does not support a blanket characterization of the findings as inconsistent. This trial used simulated cervical-spine immobilization with reduced mouth opening, rather than studying all immobilized patients. (LLM, conf=0.84)

      Experimental — accuracy not yet measured
    • cites [49] Norris, 2016, Limitations of videolaryngoscopy, Br J Anaesth source

  • May combine two claims.

    Premisecitation

    The use of sedation is not routine, and has been associated with increased awake intubation failures.

    “The use of sedation is not routine, and has been associated with increased awake intubation failures.74”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [74] Cook, 2011, Major complications of airway management in the UK: results of the Fourth National Audit Project of the Royal College of Anaesthetists and the Difficult Airway Society. Part 2: intensive care and emergency departments, Br J Anaesth source

      The Primary airway problem and What do we learn from these observations? sections discuss failed intubation in ICU and emergency departments, but do not identify awake intubation failures or link them to sedation. Searches for awake intubation and sedation found references to sedation holds and tube displacement, not evidence that sedation is non-routine or associated with increased awake intubation failures. Page numbers were unavailable in our copy. (LLM, conf=0.76)

      Experimental — accuracy not yet measured

  • Classified as probably not a substantial claim.

    Premisecitation

    The 2015 Difficult Airway Society guidelines recommend that the scalpel-bougie technique is the technique of choice for front of neck airway.

    “and that the scalpel-bougie technique is the technique of choice.89”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [89] Frerk, 2015, Difficult Airway Society 2015 guidelines for management of unanticipated difficult intubation in adults, Br J Anaesth source

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Numerous preparatory airway acronyms and checklists have been proposed to reduce errors and adverse events associated with RSI.

    “Numerous preparatory airway acronyms and checklists have been proposed to reduce errors and adverse events associated with RSI.85,86”
    Quote in the paperNot a substantial claim2 of 2 sources checked
    • cites [85] Hardy, 2016, BET 2: should real resuscitationists use airway checklists?, Emerg Med J source

      The Comments section (page not specified) says airway checklists are increasingly adopted in initiatives designed to reduce adverse events and discusses their use to reduce errors. The paper does not describe preparatory airway acronyms, so it supports the checklist portion but not the full claim. (LLM, conf=0.85)

      Experimental — accuracy not yet measured
    • cites [86] Brindley, 2017, Airway management outside the operating room: how to better prepare, Can J Anaesth source

      The Background (page not provided) proposes a mnemonic-based checklist for airway interventions outside the operating room, and the Conclusion says the authors believe it is likely to improve performance. The paper does not establish that numerous such tools have been proposed specifically for RSI or that they reduce errors and adverse events; it notes that supporting data for its checklist may be lacking. (LLM, conf=0.85)

      Experimental — accuracy not yet measured

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Front of neck airway is rare, occurring in 0.05%-1.7% of ED-based intubations.

    “Although rare (0.05%-1.7% of ED-based intubations)”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites [111] Law, 2013, The difficult airway with recommendations for management—Part 1-Intubation encountered in an unconscious/induced patient, Can J Anaesth source

  • May combine two claims.

    Premisecitation

    Both succinylcholine and rocuronium may be safely used and can provide good intubating conditions.

    “both succinylcholine and rocuronium may be safely used and can provide good intubating conditions.101”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [101] Tran, 2015, Rocuronium versus succinylcholine for rapid sequence induction intubation, Cochrane Database Syst Rev source

      The Authors’ Conclusions say succinylcholine reliably creates excellent intubating conditions and rocuronium 1 mg/kg can create acceptable conditions as a second-line option. But the Overall completeness and applicability of evidence section explicitly says the review cannot draw conclusions about safety, so it does not support the claim that both may be safely used. (LLM, conf=0.92)

      Experimental — accuracy not yet measured

  • May combine two claims.

    Premisecitation

    The balance of evidence suggests that high-flow nasal oxygenation as an adjunct to preoxygenation for RSI is both safe and effective.

    “Numerous studies have evaluated to effectiveness of HFNO as an adjunct to preoxygenation for RSI, and the balance of evidence suggest the procedure as both safe and effective.104”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [104] Wong, 2017, The effectiveness of apneic oxygenation during tracheal intubation in various clinical settings: a narrative review, Can J Anaesth source

      The section on apneic oxygenation in clinical settings reports reduced desaturation in some intubation studies, including one using high-flow nasal oxygen and one involving rapid sequence intubation. But the Conclusion (page unavailable) says most studies were too small to assess serious adverse events and warns that prolonged apneic oxygenation may be risky. The review therefore supports possible effectiveness, not the unqualified claim that HFNO is both safe and effective as an adjunct for RSI. (LLM, conf=0.89)

      Experimental — accuracy not yet measured

  • May combine two claims.

    Premisecitation

    Wire-guided approaches are not as easy or successful as once believed.

    “However, recent reviews have shown that complications associated with jet ventilation are unacceptably high and wire-guided approaches are not as easy or successful as once believed.[114][115][116][117]”
    Quote in the paperSubstantial claim3 of 4 sources checked
    • cites [114] Duggan, 2016, Transtracheal jet ventilation in the “can’t intubate can’t oxygenate” emergency: a systematic review, Br J Anaesth source
    • cites [115] Marshall, 2016, Evidence is important: safety considerations for emergency catheter cricothyroidotomy, Acad Emerg Med source

      The Type and Size of Catheter section reports failures with narrow-gauge catheter puncture, but does not identify those attempts as wire-guided. Searches for wire-guided, guidewire, and Seldinger approaches found no passage assessing their ease or success. The copy therefore does not establish the attributed claim. (LLM, conf=0.76)

      Experimental — accuracy not yet measured
    • cites [116] Cook, 2011, Major complications of airway management in the UK: results of the Fourth National Audit Project of the Royal College of Anaesthetists and the Difficult Airway Society. Part 1: anaesthesia, Br J Anaesth source

      The Emergency surgical airway section (page unavailable) reports that 12 of 19 narrow-bore and 3 of 7 wide-bore cannula cricothyroidotomy attempts failed. The Discussion (page unavailable) calls the high failure rate concerning, but the paper does not identify those attempts as wire-guided or assess whether wire-guided approaches were once thought easier or more successful. (LLM, conf=0.78)

      Experimental — accuracy not yet measured
    • cites [117] Langvad, 2013, Emergency cricothyrotomy—a systematic review, Scand J Trauma Resusc Emerg Med source

      The Discussion reports that surgical techniques were generally faster than Seldinger-based wire-guided kits, which supports the claim that wire-guided approaches may be less easy than assumed. But it also says both approaches had high success rates and found no statistically significant difference between them; it does not support the claim that wire-guided approaches were less successful than once believed. (LLM, conf=0.86)

      Experimental — accuracy not yet measured

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    In the emergency department, 20% to 30% of intubations are for trauma.

    “in the emergency department, 20% to 30% intubations are for trauma.1,2”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites [1] Brown, 2015, NEAR III Investigators. Techniques, success, and adverse events of emergency department adult intubations, Ann Emerg Med source
    • cites [2] Kerslake, 2015, Tracheal intubation in an urban emergency department in Scotland: a prospective, observational study of 3738 intubations, Resuscitation source

  • May combine two claims.

    Interpretationreasoning

    Patients with IBA do not respond to simple airway opening maneuvers alone, and may require brief ventilation support to prevent secondary hypoxic insult.

    “In contrast to patients with head injury with functional airway obstruction, patients with IBA do not respond to simple airway opening maneuvers alone, and may require brief ventilation support to prevent secondary hypoxic insult.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Interpretationreasoning

    A proportion of head-injured patients with airway obstruction will respond to basic maneuvers, and those who do not usually have more severe, less survivable injuries.

    “A proportion of these patients will respond to basic maneuvers, and those who do not usually have more severe, less survivable injuries.”
    Quote in the paperSubstantial claim

  • Classified as probably not a substantial claim.

    Premisecitation

    For patients with known or suspected airway injury, the safest way to facilitate ETI is placement of the ETT under direct visualization, ideally from the oropharynx to the carina using an FIE.

    “For patients with known or suspected airway injury, the safest way to facilitate ETI is placement of the ETT under direct visualization, ideally from the oropharynx to the carina using an FIE.68,70”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites [68] Mercer, 2016, Systematic review of the anaesthetic management of non-iatrogenic acute adult airway trauma, Br J Anaesth source
    • cites [70] Horton, 2014, Trauma reports, J Emerg Med source

  • Probably not a substantial claim: may not pass S4 (based). May combine two claims.

    Interpretationnone given

    Ventilatory pressures of 20 cm H2O or more are likely to ventilate the stomach, increasing the risk of regurgitation and aspiration.

    “ventilatory pressures of 20 cm H2O or more are likely to ventilate the stomach, increasing the risk of regurgitation and aspiration.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    The EAST guidelines recommend that aggressive behavior refractory to initial pharmacologic intervention is a discretionary indication for intubation.

    “The EAST guidelines recommend that aggressive behavior refractory to initial pharmacologic intervention is a discretionary indication for intubation”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [15] Mayglothling, 2012, Emergency tracheal intubation immediately following traumatic injury: an Eastern Association for the Surgery of Trauma practice management guideline, J Trauma Acute Care Surg source

  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.

    Interpretationnone given

    Agitation can be multifactorial and may be the result of head injury, hypoperfusion, hypoxemia, or intoxication.

    “Agitation can be multifactorial and may be the result of head injury, hypoperfusion, hypoxemia, or intoxication.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S4 (based). May combine two claims.

    Interpretationreasoning

    Distortion of facial structures may make obtaining a seal with a BVM device difficult and patients may poorly tolerate PPV, as disruption of tissues may result in worsening bleeding and in cases of associated lower airway trauma, significant subcutaneous emphysema.

    “Distortion of facial structures may make obtaining a seal with a BVM device difficult and patients may poorly tolerate PPV, as disruption of tissues may result in worsening bleeding and in cases of associated lower airway trauma, significant subcutaneous emphysema.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationnone given

    Clinical findings suggestive of significant laryngotracheal airway injury include dysphagia, hoarseness, stridor, bleeding in the upper airway, subcutaneous emphysema, expanding hematoma, or in open penetrating injuries, obvious disruption of the larynx or trachea.

    “Clinical findings suggestive of significant laryngotracheal airway injury include dysphagia, hoarseness, stridor, bleeding in the upper airway, subcutaneous emphysema, expanding hematoma, or in open penetrating injuries, obvious disruption of the larynx or trachea.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Premisecitation

    Practitioners have infrequent or limited experience in managing patients with primary airway trauma and existing management guidelines for care of these patients are mostly based on expert opinion.

    “practitioners have infrequent or limited experience in managing these patients and existing management guidelines for care of these patients are mostly based on expert opinion.68”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [68] Mercer, 2016, Systematic review of the anaesthetic management of non-iatrogenic acute adult airway trauma, Br J Anaesth source

  • Probably not a substantial claim: may not pass S4 (based).

    Interpretationnone given

    Adherence to protocols requiring rigid spinal immobilization and supine positioning may result in catastrophe.

    “Adherence to protocols requiring rigid spinal immobilization and supine positioning may result in catastrophe.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Premisecitation

    Sakles and colleagues retrospectively reviewed more than 4600 intubations and demonstrated that, although airway contamination was associated with a decreased first-attempt success rate, this was irrespective of the choice of GlideScope or DL as the first-attempt device used.

    “Recently, Sakles and colleagues 54 retrospectively reviewed more than 4600 intubations and demonstrated that, although airway contamination was associated with a decreased first-attempt success rate, this was irrespective of the choice of GlideScope or DL as the first-attempt device used.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [54] Sakles, 2017, The impact of a soiled airway on intubation success in the Emergency Department when using the GlideScope or the direct laryngoscope, Acad Emerg Med source

  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.

    Interpretationnone given

    Airway management for the patient with a primary injury to the larynx or trachea is a high-stakes scenario, in which the loss of a stable airway can happen rapidly and with little warning.

    “Airway management for the patient with a primary injury to the larynx or trachea is a high-stakes scenario, in which the loss of a stable airway can happen rapidly and with little warning.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisenone given

    Historically, the application of cricoid pressure (CP) to prevent passive aspiration has been considered an essential component of an RSI.

    “Historically, the application of cricoid pressure (CP) to prevent passive aspiration has been considered an essential component of an RSI.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S4 (based).

    Interpretationnone given

    Uncooperative, violent, or agitated patients can encumber adequate assessment, leading to missed injuries and inadequate resuscitation.

    “Uncooperative, violent, or agitated patients can encumber adequate assessment, leading to missed injuries and inadequate resuscitation.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    One option to improve visual navigation past the airway injury is to use a VL-assisted flexible endoscopic intubation.

    “One option to improve visual navigation past the airway injury is to use a VL-assisted flexible endoscopic intubation.71”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [71] Sowers, 2016, Use of a flexible intubating scope in combination with a channeled video laryngoscope for managing a difficult airway in the emergency department, J Emerg Med source

  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Interpretationnone given

    The use of any sedative, particularly in the presence of other intoxicating ingestions, may inhibit airway reflexes.

    “However, the use of any sedative, particularly in the presence of other intoxicating ingestions, may inhibit airway reflexes.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S4 (based). May combine two claims.

    Interpretationnone given

    A successful awake intubation is dependent on careful patient selection, and, in particular, identifying anatomic, pathologic, or physiologic features that would make RSI problematic.

    “A successful awake intubation is dependent on careful patient selection, and, in particular, identifying anatomic, pathologic, or physiologic features that would make RSI problematic.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S4 (based). May combine two claims.

    Interpretationreasoning

    A difficult airway paradox exists here: patients identified as difficult are selected to undergo a technically more challenging awake approach, a procedure that is performed infrequently by most emergency physicians.

    “A difficult airway paradox exists here: patients identified as difficult are selected to undergo a technically more challenging awake approach, a procedure that is performed infrequently by most emergency physicians.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Interpretationnone given

    In the supine position, the pooling of blood in the oropharynx may stimulate a gag response or vomiting, which in turn may worsen bleeding.

    “In the supine position, the pooling of blood in the oropharynx may stimulate a gag response or vomiting, which in turn may worsen bleeding.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.

    Interpretationnone given

    Swelling and tenderness at the temporomandibular joints suggests the presence of condylar factures and the possibility of mechanical trismus.

    “swelling and tenderness at the temporomandibular joints suggests the presence of condylar factures and the possibility of mechanical trismus.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationreasoning

    Use of an FIE allows both a diagnostic and therapeutic advantage: visualizing the specific pattern of injury, and facilitating careful ETT placement, while avoiding conversion to a complete transection.

    “Use of an FIE allows both a diagnostic and therapeutic advantage: visualizing the specific pattern of injury, and facilitating careful ETT placement, while avoiding conversion to a complete transection.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Interpretationnone given

    Maxillofacial fractures may also cause trismus that may resolve with the neuromuscular blockade; however, differentiating this from a mechanical obstruction before intubation is required and is often difficult.

    “Maxillofacial fractures may also cause trismus that may resolve with the neuromuscular blockade; however, differentiating this from a mechanical obstruction before intubation is required and is often difficult.”
    Quote in the paperNot a substantial claim

  • Classified as probably not a substantial claim. May combine two claims.

    Interpretationreasoning

    In the uncommon circumstance in which blood or vomit is overwhelming these management strategies, intubation is not possible and the patient is critically desaturating, rescue oxygenation with a BVM or SGA is unlikely to work and an FONA approach is indicated.

    “In the uncommon circumstance in which blood or vomit is overwhelming these management strategies, intubation is not possible and the patient is critically desaturating, rescue oxygenation with a BVM (bag-valvemask) or SGA (supraglottic airway) is unlikely to work and an FONA approach is indicated.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S4 (based). May combine two claims.

    Interpretationnone given

    Safely managing both the anticipated and unanticipated difficult airway requires technical expertise, but decisions of when and how to intervene are equally important determinants of outcome.

    “Safely managing both the anticipated and unanticipated difficult airway requires technical expertise; however, decisions of when and how to intervene are equally important determinants of outcome.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Premisecitation

    Its routine use remains controversial, with some evidence suggesting it may make various aspects of airway management more challenging.

    “However, its routine use remains controversial, with some evidence suggesting it may make various aspects of airway management more challenging.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationreasoning

    Inadequate resuscitation of hemorrhagic shock, transition to PPV, loss of sympathetic drive associated with general anesthesia, and the hemodynamic effect of many induction drugs are all contributing factors to postintubation hypotension.

    “Inadequate resuscitation of hemorrhagic shock, transition to PPV, loss of sympathetic drive associated with general anesthesia, and the hemodynamic effect of many induction drugs are all contributing factors.”
    Quote in the paperSubstantial claim

  • Classified as probably not a substantial claim. The quote only partly states this claim.

    Interpretationreasoning

    Securing the airway will have the best chance of making a positive difference in trauma patient outcomes when preceded by resuscitation and clear communication.

    “Then, securing the airway will have the best chance of making a positive difference in trauma patient outcomes.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S4 (based). May combine two claims.

    Interpretationnone given

    Airway management in trauma begins as soon as patient contact is made and rarely starts with placement of an endotracheal tube.

    “Airway management in trauma begins as soon as patient contact is made and rarely starts with placement of an ETT.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Interpretationnone given

    Hemodynamic instability in trauma is most commonly caused by hypovolemia due to hemorrhage.

    “Hemodynamic instability in trauma is most commonly caused by hypovolemia due to hemorrhage.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S4 (based).

    Interpretationnone given

    Paralysis should have no direct effect on the patient's hemodynamic status.

    “Paralysis should have no direct effect on the patient's hemodynamic status”
    Quote in the paperNot a substantial claim

  • Classified as probably not a substantial claim. May combine two claims.

    Interpretationreasoning

    Success in trauma airway management is dependent on a shared understanding of the importance of resuscitation before intubation and clear communication of what and when various airway interventions will be performed.

    “Whether the team is a doctor, nurse, and transporting paramedics or a group of 10, success is dependent on a shared understanding of the importance of resuscitation before intubation and clear communication of what and when various airway interventions will be performed.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Premisenone given

    Vasopressors have traditionally been avoided in trauma based on concerns that they may worsen bleeding.

    “Vasopressors have traditionally been avoided in trauma based on concerns that they may worsen bleeding.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S4 (based). May combine two claims.

    Interpretationnone given

    Effective trauma care requires a team approach, with resuscitation priorities clearly communicated and interventions guided by the physiologic priorities that ensure adequate oxygen delivery.

    “Effective trauma care requires a team approach, with resuscitation priorities clearly communicated and interventions guided by the physiologic priorities that ensure adequate oxygen delivery.”
    Quote in the paperNot a substantial claim

  • Classified as probably not a substantial claim. May combine two claims.

    Interpretationnone given

    The scalpel-bougie technique relies on gross motor skills, uses familiar equipment (scalpel, bougie, and a #6 ETT), and has a minimal number of steps.

    “The scalpel-bougie technique has several advantages for the emergency clinician: it relies on gross motor skills (which are more likely to be preserved during periods of acute stress), uses familiar equipment (scalpel, bougie, and a #6 ETT), and has a minimal number of steps.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Interpretationnone given

    Providing advanced airway management is part of the A and B and C parallel resuscitative priorities of trauma care.

    “Providing advanced airway management is part of the A and B and C parallel resuscitative priorities of trauma care.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S4 (based). May combine two claims.

    Interpretationreasoning

    Having the sick trauma patient wake up to a state that he or she will be able rescue his or her own airway is simply not realistic, and will make efforts to secure the airway even more difficult.

    “Having the sick trauma patient wake up to a state that he or she will be able rescue his or her own airway is simply not realistic, and will make efforts to secure the airway even more difficult.”
    Quote in the paperNot a substantial claim

  • Classified as probably not a substantial claim.

    Interpretationreasoning

    Extended, deep paralysis is desirable in potentially difficult airway cases, as it helps to create optimal conditions for laryngoscopy, BVM and SGA ventilation, and FONA.

    “extended, deep paralysis is in fact desirable in this circumstance, as it helps to create optimal conditions for laryngoscopy, BVM and SGA ventilation, and FONA.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S4 (based).

    Interpretationnone given

    Intravascular depletion shifts the gradient between right atrial pressure and mean systemic pressure, reducing preload and subsequently mean arterial pressure.

    “Intravascular depletion shifts the gradient between right atrial pressure Trauma Airway and mean systemic pressure, reducing preload and subsequently mean arterial pressure.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S4 (based).

    Interpretationnone given

    Gaining intravenous access, beginning fluid resuscitation, and applying oxygen may be lifesaving and/or bridging interventions that allow for the safe execution of downstream more definitive procedures.

    “Gaining intravenous access, beginning fluid resuscitation, and applying oxygen may be lifesaving and/or bridging interventions that allow for the safe execution of downstream more definitive procedures.”
    Quote in the paperNot a substantial claim
56 of 56

  • The paper relies on this without support.

    Traumatic brain injury (TBI) is the most common cause of mortality in trauma patients.

    “Traumatic brain injury (TBI) is the most common cause of mortality in trauma patients.”

  • The paper relies on this without support.

    Airway management in TBI patients is often performed for airway protection.

    “Airway management in this cohort of patients is often performed for airway protection.”

  • The paper relies on this without support.

    Severe or catastrophic brain injury is usually nonsurvivable, and associated with early death.

    “Severe or catastrophic brain injury is usually nonsurvivable, and associated with early death.”

  • The authors state this as an assumption.

    Structural collapse of the airway may occur during an RSI.

    “Practitioners must proceed with the assumption that structural collapse of the airway may occur during an RSI.”

  • The paper relies on this without support.

    Proceeding with an RSI in a patient who is already hypoxemic can result in catastrophic complications.

    “Proceeding with an RSI in a patient who is already hypoxemic can result in catastrophic complications.”

  • The paper relies on this without support.

    High oxygen saturation is not a true measurement of oxygen reserve.

    “Although high oxygen saturation is reassuring, it is not a true measurement of oxygen reserve.”

  • The paper relies on this without support.

    Increasing the oxygen reserve has three components: denitrogenation of the lungs, recruitment of alveoli with PEEP, and apneic oxygenation.

    “Increasing the oxygen reserve has 3 components: denitrogenation of the lungs, recruitment of alveoli with PEEP, and apneic oxygenation.”

  • The paper relies on this without support.

    Denitrogenation is the primary physiologic mechanism of preoxygenation and is dependent on delivery of a high concentration of oxygen, resulting in a 10-fold increase in available oxygen.

    “Denitrogenation is the primary physiologic mechanism of preoxygenation and is dependent on delivery of a high concentration of oxygen, resulting in a 10-fold increase available oxygen.”

  • The paper relies on this without support.

    Increased functional residual capacity provides an ongoing reservoir to keep hemoglobin saturated.

    “Increased functional residual capacity (FRC) provides an ongoing reservoir to keep hemoglobin saturated.”

  • The paper relies on this without support.

    A PEEP valve attached to a bag-valve-mask and applied over conventional nasal prongs at high flow (15 LPM) in a spontaneously breathing patient will produce continuous positive airway pressure-like conditions.

    “A PEEP valve attached to a BVM and applied over conventional nasal prongs at high flow (15 LPM) in a spontaneously breathing patient will produce continuous positive airway pressure-like conditions.”
10 of 10

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

Each contradiction between two passages listed here was confirmed by an independent check.

  • Shock index is defined in opposite ways

    Minor

    The main text defines shock index as heart rate divided by systolic blood pressure, but the Figure 5 caption reverses the ratio. This affects interpretation of the stated risk threshold of greater than 0.8.

1 of 1

Cites

Flagged first, then by citations

Research works printed but not linked: 3

  1. Levitan, 2015, Tips for using a hyperangulated video laryngoscope, ACEP Now
  2. Levitan, 2015, Timing resuscitation sequence intubation for critically ill patients, ACEP Now
  3. Levitan, 2013, Levitan, the laryngeal handshake and the cartilaginous cage, PHARM Prehospital Retr Med

Cited by

Sorted by citations

Related

Authors
Kovacs, G., & Sowers, N.
Affiliations
Dalhousie University (CA)
Corresponding author
Kovacs, George
ORCID
Venue
Emergency Medicine Clinics of North America
Publisher
Elsevier BV
Published
2018-02
Volume
36
Issue
1
Pages
61-84
ISSN
0733-8627 (ISSN-L)
DOI
10.1016/j.emc.2017.08.006
OpenAlex
W2767387972
Cited by
115
References
116
Citations by year
2026: 9 · 2025: 14 · 2024: 16 · 2023: 19 · 2022: 18 · 2021: 13 · 2020: 14 · 2019: 9 · 2018: 2 · 2017: 1
FWCI
1.57
Type
journal article
Language
en
Open access
Licence
Locations
  • Emergency Medicine Clinics of North America (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Anesthesiology and Pain Medicine › Airway Management and Intubation Techniques
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Tracheal and airway disorders
  • Health Sciences › Medicine › Emergency Medicine › Trauma and Emergency Care Studies
Keywords
airway management, trauma patients, polytrauma, difficult airway, endotracheal intubation, traumatic brain injury, cervical spine injury, maxillofacial trauma, airway injury
MeSH terms
Airway Obstruction, Craniocerebral Trauma, Humans, Intubation, Intratracheal, Wounds and Injuries, Airway Management

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Claims read by deepseek-v4.1-flash under definition version 3 (extract-v3) on 2026-11-02.

Classified by jev-1.13-20260917 (gold-guideline-v0.2) on 2026-11-02.

Cited sources are checked by gpt-6-sol.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

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