The core clinical question addressed by the research team is: Which contemporary airway techniques and planning principles are most relevant to routine and emergency otolaryngology and head and neck surgery? Their bottom line is clear: while modern Ear, Nose, and Throat (ENT) airway management relies heavily on collaborative efforts, advanced tools, and tailored surgical knowledge, the development of comprehensive difficult-airway guidelines remains predominantly anchored in anesthesiology. This is attributed to a significant scarcity of dedicated otolaryngology-specific research in this domain, a finding underscored by the review’s extensive literature search.

The Unique Challenges of ENT Airway Management

The background presented in the review underscores the inherent difficulties associated with airway management in otolaryngology. Unlike many other surgical specialties, ENT procedures frequently involve a delicate balance between securing the airway for anesthesia and maintaining unobstructed surgical access for the otolaryngologist. This shared access creates a unique set of challenges. Furthermore, the very nature of airway pathology, whether congenital, acquired through trauma, or altered by previous treatments like radiation therapy or surgery, significantly complicates intubation and ventilation strategies. The potential for intraoperative bleeding, a common occurrence in head and neck dissections, poses an immediate threat to airway patency, requiring vigilant monitoring and rapid intervention.

Patients undergoing otolaryngology and head and neck procedures are not merely at an increased risk of airway complications; they are disproportionately represented among those requiring major airway interventions and emergency surgical airway placement. This heightened risk profile necessitates a proactive and meticulously planned approach to airway management, extending beyond the immediate operative period to encompass preoperative assessment and postoperative care.

A Decade of Research: Unveiling a Literature Deficit

The study design employed by Bola and colleagues was a narrative review, supplemented by a structured search of prominent medical databases: PubMed, EMBASE, and Cochrane. The temporal scope of this search was deliberately focused on the decade spanning January 2015 to January 2025, aiming to capture the most current and relevant advancements in airway management. The literature search spanned across multiple disciplines, including otolaryngology, anesthesiology, pediatrics, trauma, and emergency medicine, reflecting the multidisciplinary nature of airway care.

The initial search yielded an impressive 4,641 airway-related articles. However, the application of the 10-year date restriction and subsequent screening processes narrowed this down significantly. Ultimately, 967 publications were deemed relevant and underwent detailed review. A striking observation emerged from this analysis: the overwhelming majority of these publications, 301 in total (representing 31% of the reviewed literature), appeared in anesthesiology journals. In stark contrast, only a meager eight articles (a mere 0.8%) were published in dedicated otolaryngology journals. This disparity powerfully illustrates the limited volume of ENT-specific difficult-airway guidance available, underscoring the review’s central argument.

A Spectrum of Airway Devices and Techniques

The review meticulously details a range of contemporary airway management techniques and specialized endotracheal tubes, highlighting the critical trade-offs inherent in each. These include:

  • Standard Endotracheal Tubes: The workhorse of airway management, these tubes are essential for controlled ventilation. However, their presence can sometimes impede surgical access, especially in complex head and neck dissections.
  • Reinforced Endotracheal Tubes: These tubes offer enhanced resistance to kinking, which can be crucial in procedures involving significant head and neck manipulation or prolonged operative times.
  • Microlaryngoscopy Tubes: Specifically designed for use during microlaryngoscopy, these tubes are often smaller in diameter to facilitate visualization and manipulation within the larynx.
  • Laser-Resistant Endotracheal Tubes: For procedures involving lasers, particularly in the airway, specialized laser-resistant tubes are paramount to mitigate the risk of ignition and catastrophic airway fire. The choice of material and cuff design are critical considerations here.
  • Ring-Adair-Elwyn (RAE) Tubes: These tubes are designed with a pre-formed curve to pass over the patient’s face, keeping the anesthesia circuit away from the surgical field. They are particularly useful in oral and maxillofacial surgery.
  • Nerve-Monitoring Endotracheal Tubes: In surgeries where recurrent laryngeal nerve function is a concern, such as thyroidectomies or neck dissections, these tubes incorporate electrodes that allow for intraoperative nerve monitoring, aiding in the preservation of vocal cord function.

The review emphasizes that the selection of any given tube is a delicate balancing act, weighing factors such as airway security, the need for unobstructed surgical access, resistance to collapse or kinking, ease of positioning, and the potential risk of fire, particularly in laser or diathermy use.

Advanced Ventilation Strategies and Their Nuances

Beyond endotracheal tubes, the review delves into advanced ventilation techniques that can significantly enhance surgical exposure and improve patient outcomes:

  • Jet Ventilation: This technique delivers high-pressure oxygen in short bursts, which can provide excellent surgical exposure during procedures within the larynx, such as tumor resection or vocal cord surgery. However, jet ventilation demands considerable expertise. Challenges include the difficulty in accurately monitoring carbon dioxide levels (end-tidal CO2 monitoring is often unreliable), and potential complications such as hypercapnia (elevated CO2 in the blood), gas trapping, and barotrauma (lung injury due to excessive pressure).

  • High-Flow Nasal Oxygen (HFNO) and Transnasal Humidified Rapid-Insufflation Ventilatory Exchange (THRI VE): These techniques have gained traction for their ability to prolong apneic oxygenation – the period during which a patient can be oxygenated without active ventilation. They can serve as a valuable bridge during difficult airway management or for brief surgical interventions. However, their efficacy is contingent on a patent upper airway, and they are unsuitable for use during laser or diathermy procedures due to the risk of combustion.

  • Supraglottic Devices: Second-generation supraglottic airway devices have evolved to offer improved sealing capabilities and gastric drainage ports, making them valuable tools for routine airway management and as rescue devices in challenging intubations. Their ease of insertion and potential to avoid direct laryngoscopy can be advantageous in specific scenarios.

Addressing Specific ENT Airway Scenarios

The narrative review also addresses a spectrum of specific scenarios encountered in otolaryngology, including:

  • Pediatric Bronchoscopy: Managing the pediatric airway during bronchoscopy for foreign body retrieval or diagnostic purposes requires specialized knowledge and equipment due to the smaller anatomy and different physiological responses of children.
  • Bleeding Airways: Intraoperative hemorrhage into the airway is a critical emergency. Rapid suctioning, repositioning, and sometimes immediate airway intervention are necessary.
  • Trauma Airways: Traumatic injuries to the face, neck, or larynx often present complex airway challenges, necessitating a thorough assessment of all potential injuries and a tailored intubation strategy, often involving videolaryngoscopy or awake techniques.
  • Stridor: The presence of stridor, an abnormal high-pitched breathing sound, indicates upper airway obstruction and requires prompt diagnosis and management, which may range from conservative measures to urgent surgical intervention.
  • Tubeless-Field Surgery: In certain procedures, particularly those involving the pharynx or larynx, the goal may be to achieve adequate oxygenation and ventilation without an endotracheal tube in the surgical field, demanding innovative anesthetic and airway management techniques.

The Role of Videolaryngoscopy and Awake Intubation

Videolaryngoscopy has emerged as a significant advancement, potentially improving visualization in difficult or trauma-associated airways. By providing a magnified and indirect view of the glottis, it can facilitate successful intubation where direct laryngoscopy might fail.

Simultaneously, the review reaffirms the enduring importance of awake tracheal intubation. This technique, when performed by experienced clinicians, remains a crucial option when severe airway difficulty is anticipated, allowing for patient cooperation and real-time assessment of airway reflexes.

Emergency Front-of-Neck Access: A Rescue Strategy

The review concludes with a vital point on emergency front-of-neck access (FONA), such as cricothyroidotomy or tracheostomy. It strongly advocates for FONA to be viewed and planned as a rescue strategy, reserved for situations where all other intubation attempts have failed, rather than being considered a universal first-line approach. This emphasizes the importance of mastering conventional intubation techniques and developing robust algorithms for managing difficult airways before resorting to invasive surgical airway procedures.

Limitations and Future Directions

The authors acknowledge the inherent limitations of their narrative review, including the subjective nature of article selection, the absence of a formal quality assessment of the included studies, the heterogeneity of the evidence base, and the variations in institutional equipment and expertise. These factors underscore the need for more standardized research and the development of evidence-based guidelines specifically tailored to the otolaryngology and head and neck surgery context.

The stark disparity in published literature highlights a critical area for future research and academic focus within otolaryngology. Collaborative efforts between anesthesiology and otolaryngology departments are essential to bridge this knowledge gap. Future research should aim to develop and validate ENT-specific difficult airway algorithms, assess the efficacy of novel airway devices and techniques within the unique surgical context, and rigorously evaluate outcomes to inform best practices. The high-risk nature of airway management in this specialty demands a continuous commitment to advancing knowledge and refining techniques to ensure the highest standards of patient safety.