4- Advanced Airway

Orotracheal Intubation

Orotracheal Intubation: The insertion of a tube through the mouth, proceeding along the oropharynx and larynx into the trachea. This procedure is often referred to as endotracheal or tracheal intubation. The terms orotracheal intubation, endo-tracheal intubation, and tracheal intubation are often usedinterchangeably.

  • This technique is typically performed using a laryngoscope, which allows for visualization of the airway structures, aiding in guiding the tube placement through the vocal cords directly into the trachea.

Indications

Orotracheal intubation is indicated in various scenarios, including:

  • Inability to ventilate the patient using basic airway management techniques such as mouth-to-mask or bag-valve mask (BVM) ventilation.

  • patient unable to protect airway

  • Patients who are unresponsive or lack a gag or cough reflex,

Contraindications

While orotracheal intubation is a critical procedure, there are some contraindications, including:

  • Total upper airway obstruction that necessitates surgical airway management (e.g., in cases of trauma where the airway is completely obstructed).

  • Total loss of facial or oropharyngeal landmarks, which may occur in severe facial trauma or anatomical distortion, requiring alternative methods.

Equipment Required

For a successful intubation, the following equipment is necessary:

  • Laryngoscope with appropriate blades

  • Tracheal tube (size based on patient’s age/size)

  • Stylet for shaping the tracheal tube

  • Water-soluble lubricant to ease tube insertion

  • 10 mL syringe for inflation of the cuff on the tracheal tube

  • Tracheal tube securing device to prevent accidental removal

  • Suction unit for clearing airway secretions

  • Towels or padding for head positioning

  • Stethoscope to assess breath sounds

  • End-tidal CO2 detector or esophageal detection device to confirm placement of tube

Technique

The technique involves several meticulous steps:

  1. Positioning: The patient should be placed in the optimal sniffing position to align the airway.

  2. The laryngoscope is carefully maneuvered to lift the epiglottis, exposing the vocal cords for direct visualization.

  3. The tracheal tube should be guided through the glottic opening and into the trachea, utilizing the stylet for support but ensuring it does not extend beyond the tube's end to avoid airway trauma.

  4. Proper placement is confirmed by observing chest rise, auscultating lung sounds, and utilizing an end-tidal CO2 detector.

Anatomical Landmarks

Key anatomical structures involved during the procedure include:

  • Tongue

  • Epiglottis

  • Vocal cords

  • Vallecula

  • Glottis

  • Esophagus

Cricothyroidotomy

Definition

Cricothyroidotomy: An emergency surgical procedure designed to secure an airway in critical situations when traditional intubation methods fail. This procedure provides immediate access to the airway. also known as cricothyrotomy

Indications

Cricothyroidotomy is indicated for:

  • Trauma resulting in oral, pharyngeal, or nasal hemorrhage that obscures the airway.

  • Facial muscle spasms or laryngospasm that prevent intubation.

  • Uncontrollable emesis that threatens airway patency.

  • Upper airway stenosis or congenital deformities that obstruct normal airflow.

  • Situations where the patient has clenched teeth, making traditional intubation impossible.

Contraindications

  • Generally, it is not recommended for patients below 12 years of age due to the risk of injury to the underlying structures and the smaller anatomy of the pediatric patient. In such cases, a needle cricothyroidotomy is preferred.

Equipment Required

The following equipment is essential:

  • Antiseptic preparation solution to prevent infection

  • Lidocaine for local anesthesia

  • Sterile drape, gown, and gloves

  • No. 11 scalpel blade for making an incision

  • 10 mL syringe for air or saline inflation as needed

  • Bag-valve mask if ventilation is required post-procedure

  • Tracheal hook for securing the airway

  • Either a tracheostomy tube or endotracheal tube for establishing the airway

Technique Considerations

  1. Under sterile conditions, utilize the scalpel to create an incision through the skin and underlying cartilage to access the airway.

  2. Position the tracheal tube promptly to secure the airway.

  3. Ensure the airway is well-maintained through ongoing reassessment of ventilation.