Complications of tracheal intubation

Technical issues and airway obstruction

General anesthesia requires flawless equipment operation and continuous monitoring of the patient's breathing. Technical causes of complications include anesthesia machine malfunctions, circuit leaks, or complete airway hose obstruction. The primary preventive measure for such situations is mandatory inspection of all equipment prior to anesthesia.

In addition to equipment, anatomical airway obstruction poses a threat. During deep anesthesia (surgical stage III$_3$), tongue retraction frequently occurs. To correct this, the mandible must be timely advanced and continuously supported. Another cause of airway obstruction is the entry of foreign bodies—natural teeth or denture elements—into the upper respiratory tract. For prevention, the physician must carefully examine the oral cavity and remove all removable dentures before inducing anesthesia.

Complications of direct laryngoscopy

Tracheal intubation using direct laryngoscopy requires high precision. Technique errors during the procedure lead to a number of specific complications:

• Mechanical trauma: rough use of the laryngoscope blade can damage teeth, and advancing the tube carries a risk of vocal cord injury.
• Misplacement: the most critical error is accidental esophageal intubation. Too deep advancement is also possible, where the tube enters exclusively the right main bronchus, halting ventilation of the left lung.
• Fixation failure: accidental extubation (unintentional dislodgement of the tube from the trachea) or dangerous kinking of the tube itself, blocking oxygen delivery, may occur during surgery.

Specifics of intubation in maxillofacial trauma

Airway management in children and adults with suspected facial bone fractures requires a preliminary thorough visual and physical examination. Assessment of craniomaxillofacial pathology directly impacts intubation safety.

The physician must evaluate several key parameters:

1. Mandibular mobility: restricted mouth opening often indicates a fracture.
2. Jaw deviation: upon mouth opening, the chin deviates from the midline toward the injury side.
3. Oral cavity and occlusion: the integrity of the mucosa, teeth, and any malocclusion typical of fractures are assessed.
4. Tooth percussion: acute pain upon percussion is characteristic of teeth adjacent to the fracture line.

Emergency measures and risks in combined trauma

Patients with traumatic brain injury combined with skull base and facial fractures are at high risk. The primary threat here lies in bleeding and airway aspiration.

In such situations, urgent emergency measures are required:

• Emergency airway management via rapid tracheal intubation or placement of an oropharyngeal airway.
• Mechanical hemostasis, including anterior and posterior nasal packing, as well as pharyngeal packing.

Further management of such patients is complicated by high risks. Potential consequences of combined trauma include asphyxia, anemia, bronchopulmonary and intracranial purulent-inflammatory diseases, sinusitis, traumatic osteomyelitis, and severe post-traumatic deformities. For a comprehensive severity assessment at admission, a multidisciplinary team including an anesthesiologist-intensivist, neurosurgeon, maxillofacial surgeon, and other specialists must be involved.

Class and exam questions

What else to study on this topic

• Surgical stage of anesthesia III$_3$: impact on muscle tone and reflexes.
• Technique for safe mandibular advancement and oropharyngeal airway placement.
• Specifics of anterior and posterior nasal packing in facial skeletal trauma.
• Differential diagnosis methods for facial skull bone fractures.
• Pathogenesis of purulent-inflammatory complications (osteomyelitis, sinusitis) following maxillofacial trauma.

Other topics in the "Additional Topics" section

Prepared by WhiteCoat Pro faculty in accordance with the medical school curriculum. For educational purposes only.