Preloaded vs. Standard Bougie: Which Intubation Technique is Right for You?
"A new study explores the effectiveness of preloaded bougie techniques in emergency intubation, offering insights for medical professionals."
In emergency medicine, securing a patient's airway is a critical, often life-saving, intervention. Endotracheal intubation, the process of inserting a tube into the trachea to assist breathing, is a cornerstone of emergency care. However, difficult airways can present significant challenges, requiring practitioners to be adept at various intubation techniques and the use of airway adjuncts.
One such adjunct is the bougie, a flexible introducer that aids in guiding the endotracheal tube (ETT) into the trachea, particularly when visualization of the vocal cords is obstructed. Traditionally, the bougie is inserted first, followed by the ETT being threaded over it. However, a modified approach, known as the preloaded bougie (PB) technique, involves loading the ETT onto the bougie before insertion. This article will help you understand more about this approach.
A recent study has compared the preloaded bougie technique against the standard bougie technique in a cadaveric model, evaluating success rates, time to intubation, and provider preference. Understanding the nuances of these techniques can empower emergency airway operators to choose the method with which they are most comfortable and proficient.
Bougie as an Adjunct
An endotracheal tube introducer, or bougie, cannulates the trachea before endotracheal tube delivery using the Seldinger technique. In most emergency departments, the bougie has historically been used as an adjunct or rescue device for difficult airways rather than as part of a primary intubation strategy. The source attributes this practice partly to clinicians' inexperience with the device. A 2025 guide argues for considering a bougie-first strategy, particularly when appropriate patient selection and procedural preparation are available.
From Catheter to Modern Introducer
The history of the gum-elastic bougie extends across almost half a century of development and controversy. In 1949, Macintosh described using a gum-elastic urinary catheter as an introducer to facilitate difficult tracheal intubation. In 1973, Dr. P. Hex Venn, an anaesthetic adviser to Eschmann Brothers & Walsh Ltd, designed a later tube-introducer development. Modern tube introducers have since evolved for the era of video laryngoscopy and are considered for more than backup rescue use.
Preloaded Bougie vs. Standard Bougie: Understanding the Techniques
Before diving into the study's findings, it's essential to clarify the two techniques being compared. The standard bougie technique involves first visualizing the glottis with a laryngoscope and then inserting the bougie into the trachea. An assistant then threads the ETT over the bougie, which is subsequently advanced into the trachea. The preloaded bougie (PB) technique, on the other hand, involves pre-positioning the ETT over the bougie before even beginning laryngoscopy. The operator then guides the bougie, with the ETT already in place, through the vocal cords and into the trachea.
- Standard Bougie Technique: The bougie is inserted first, followed by the ETT.
- Preloaded Bougie (PB) Technique: The ETT is pre-positioned on the bougie before insertion.
Recent First-Pass Evidence
In a randomized crossover manikin trial conducted during continuous chest compressions, first-attempt success was 98.5% with the bougie-first approach, 87.7% with a preloaded bougie, 86.2% with an endotracheal tube and stylet, and 70.8% with an endotracheal tube without a stylet. A separate pediatric-airway study found that, in an easy airway, naked endotracheal tubes and stylets had higher first-pass success than railroaded or preloaded bougies. In that study, the mean success rates were 96.3% for the naked tube and 98.2% for the stylet. These findings indicate that performance varies with the airway model and technique being tested.
Limits of Preloading
A cadaveric comparison reported that bougies can be particularly effective with a Cormack-Lehane Grade III view, in which only the epiglottis is seen, and when obesity, limited cervical mobility, or upper-airway distortion is present. The same source reports that success rates for difficult orotracheal intubation with bougies have ranged from 74% to 99%. These figures describe a broad range rather than a single expected success rate. The evidence therefore supports usefulness in difficult airways while leaving room for substantial variation by setting and technique.
Bougie Versus Stylet
The Bougie Use In Emergency Airway Management (BEAM) trial was a randomized, single-center clinical trial conducted in 2018 at one of the sites included in the BOUGIE trial. It reported a 98% first-pass success rate with a bougie compared with 87% with a stylet. The cited source notes that the center had a baseline default intubation method, which is relevant when interpreting the comparison. A separate study protocol is evaluating routine bougie use during prehospital emergency intubation in adults without predictors of difficult airway, reflecting continued uncertainty about its role in standard cases.
The Bottom Line: Choosing the Right Technique for You
Ultimately, the choice between the standard bougie and preloaded bougie techniques may come down to personal preference and comfort level. Both techniques have proven effective in securing airways during emergency intubation. Emergency airway operators should feel confident in using the technique with which they are most comfortable, and proficient in both methods.
Use First, Not Only as Rescue
A meta-analysis found that using a bougie as an aid during the first intubation attempt was associated with increased success. However, the certainty of the evidence was low. The authors concluded that a bougie should probably be used first rather than reserved only as a rescue device in emergency intubations. This recommendation should therefore be understood alongside the stated limitation in evidence certainty.
Practice Patterns and Training
The bougie is used to cannulate the trachea before endotracheal tube delivery through the Seldinger technique. Despite that role, most emergency departments have not incorporated it into a primary intubation strategy and have historically treated it as an adjunct or rescue device for difficult airways. The source suggests that inexperience with bougie use may help explain this practice pattern. Expanding its role therefore involves not only choosing a device but also building familiarity with its preparation and use.