Certified Registered Nurse Anesthetist (CRNA) Practice Exam

Emergency cricothyroidotomy is performed with a #11 blade between which cartilages?

1. Thyroid and cricoid cartilages

2. Cricoid and arytenoid cartilages

3. Thyroid and arytenoid cartilages

4. Cricoid and tracheal cartilages

The correct answer is: Thyroid and cricoid cartilages

The emergency cricothyroidotomy is a life-saving procedure performed to quickly secure an airway in situations where endotracheal intubation may not be possible, such as in cases of significant facial trauma or upper airway obstruction. This procedure specifically involves making an incision through the skin over the cricothyroid membrane, which is located between the thyroid and cricoid cartilages. The reason this anatomical location is important lies in the relationship of these cartilages in the neck. The thyroid cartilage is the largest of the cartilages, forming the prominent " Adam's apple," and the cricoid cartilage is located directly below it. The cricothyroid membrane is a thin tissue that connects these two cartilages. When an emergency cricothyroidotomy is performed, the incision is made through this membrane, allowing access to the airway for ventilation purposes. The specific anatomy is critical for this procedure to ensure that the airway is accessed safely and effectively without damaging surrounding structures. Understanding the correct landmarks is crucial for performing the procedure correctly and minimizing complications.