What is the primary reason for taking extreme care during an intercostal nerve block?

The primary reason for taking extreme care during an intercostal nerve block is to prevent damage to the intercostal nerve and vessels. This procedure involves injecting anesthetic near the intercostal nerves, which run between the ribs, to provide pain relief in the thoracic region. Careful technique is essential because these nerves are closely associated with vascular structures.

If the intercostal nerve is damaged, it can lead to unintended complications such as persistent pain, increased sensitivity, or loss of function in the affected area. Additionally, injury to nearby blood vessels can cause hematoma formation or bleeding complications. Therefore, the main focus during the procedure is to ensure both the nerve and the vascular structures are safeguarded while achieving the goal of anesthetic delivery.