Patients undergoing extracorporeal shock-wave lithotripsy are at increased risk for which complication at the end of the procedure under regional anesthesia?

Patients undergoing extracorporeal shock-wave lithotripsy are at increased risk for which complication at the end of the procedure under regional anesthesia?

• A. Venous air embolism
• B. Pneumothorax
• C. Peripheral neuropathies
• D. Hypotension with regional anesthesia at the end of the procedure

Answer: (D)

Regional anesthesia works by blocking sympathetic nerves in the area of the block, which causes loss of vascular tone and mixing of blood pooling in the venous system. This sympathetic blockade leads to vasodilation and reduced venous return, so the heart receives less preload and systemic vascular resistance drops. As the block persists toward the end of the procedure and the patient begins to move or the block starts to wear off, this vasodilation can produce hypotension. That makes low blood pressure the most likely complication at the end of an ESWL procedure when regional anesthesia is used. Other potential issues like air embolism, pneumothorax, or nerve injuries are less directly tied to a typical ESWL setup with regional anesthesia and are not as characteristic of this scenario. Management focuses on fluid optimization and using vasopressors as needed to maintain blood pressure.

Regional anesthesia works by blocking sympathetic nerves in the area of the block, which causes loss of vascular tone and mixing of blood pooling in the venous system. This sympathetic blockade leads to vasodilation and reduced venous return, so the heart receives less preload and systemic vascular resistance drops. As the block persists toward the end of the procedure and the patient begins to move or the block starts to wear off, this vasodilation can produce hypotension. That makes low blood pressure the most likely complication at the end of an ESWL procedure when regional anesthesia is used. Other potential issues like air embolism, pneumothorax, or nerve injuries are less directly tied to a typical ESWL setup with regional anesthesia and are not as characteristic of this scenario. Management focuses on fluid optimization and using vasopressors as needed to maintain blood pressure.