Emergency Anatomy: Critical Procedures

Emergency anatomy knowledge is essential for life-saving procedures performed under time pressure. Understanding the relevant anatomy prevents complications and ensures procedural success.

Cricothyrotomy: Performed when intubation fails. The cricothyroid membrane is located between the thyroid and cricoid cartilages in the anterior neck. This avascular membrane can be safely incised to establish an emergency airway.

Needle thoracostomy: Performed for tension pneumothorax. A large-bore needle is inserted into the second intercostal space at the midclavicular line, immediately above the third rib to avoid the neurovascular bundle running along the inferior rib margin.

Pericardiocentesis: Performed for cardiac tamponade. A needle is inserted at the left xiphocostal angle, directed toward the left shoulder at a 45-degree angle, to aspirate fluid from the pericardial sac.

Central venous access: The internal jugular vein is accessed at the apex of the triangle formed by the two heads of the sternocleidomastoid muscle. The subclavian vein is accessed just inferior to the clavicle at the junction of the medial and middle thirds.