Cricothyrotomy · What Is It, Indications, How It’s Done, and More

While both cricothyrotomy and tracheostomy are invasive procedures designed to secure the airway, they differ significantly in anatomical location, clinical indications, and urgency. A cricothyrotomy is typically performed in emergency situations when other methods to secure the airway have failed, requiring immediate access. The procedure involves making an incision through the cricothyroid membrane. This method is generally considered a temporary solution, intended to provide airway access until a more definitive airway, such as a tracheostomy, can be established. 

In contrast, a tracheostomy is a planned surgical procedure, often performed in a controlled setting for patients requiring long-term airway support. This procedure involves creating an opening in the trachea, usually between the second and third tracheal rings, below the cricoid cartilage. Tracheostomies are frequently indicated for individuals with chronic respiratory failure, prolonged intubation, after reconstructive surgery of the larynx or pharynx, or for conditions that obstruct the upper airway. Unlike cricothyrotomy, tracheostomy is intended to be a more permanent or long-term solution for airway management. 

Cricothyrotomy is indicated in "Cannot Intubate, Cannot Oxygenate" (CICO) scenarios, where all conventional methods of securing and maintaining an airway have failed. These scenarios typically involve emergency situations of severe airway obstruction. For example, in cases of significant facial or oral trauma leading to excessive bleeding, or in instances of cervical spine injury where intubation is contraindicated, immediate cricothyrotomy is necessary to secure the airway.  

Additionally, conditions causing substantial airway swelling, such as anaphylactic shock or severe infections like epiglottitis, often necessitate cricothyrotomy to maintain patency of the airway. The presence of large masses in the upper respiratory tract may also make intubation technically impossible or unsafe, thereby requiring cricothyrotomy. Furthermore, cricothyrotomy is indicated when non-invasive ventilation strategies, such as ventilation masks or supraglottic airway devices, fail to achieve adequate oxygenation. In these critical situations, where rapid airway access is vitally important and time limits the use of more definitive techniques like tracheostomy, cricothyrotomy serves as a life-saving intervention. 

Three main techniques have been described for performing a cricothyrotomy, including the needle cricothyrotomy, percutaneous cricothyrotomy using the Seldinger technique, and surgical cricothyrotomy.  

Needle cricothyrotomy is a minimally invasive procedure, that begins with the identification of the cricothyroid membrane. After cleaning the area with antiseptic, a large-bore needle (typically 12- to 14-gauge) attached to a syringe filled with normal saline is inserted through the skin and cricothyroid membrane toward the feet at a 30 to 45-degree angle. Gentle aspiration is performed continuously during syringe advancement, creating a slight negative pressure. The appearance of air bubbles in the syringe  confirms entry into the trachea. Once air is aspirated, indicating successful placement, the catheter is advanced until the hub touches the skin, and the needle is retracted. To confirm correct intratracheal placement of the catheter, it is important to attach the saline syringe to the catheter and aspirate air. Jet ventilation with 100% oxygen is then attached to the catheter ensuring temporary oxygenation until a more definitive airway can be established.