Which of the following is NOT a mechanism of nerve injury?

• A. Positioning
• B. Traction
• C. Division
• D. Thermal burn

Answer: (D)

The main idea is how nerves can be harmed during laparoscopic procedures. Nerves are most often injured by mechanical forces: being stretched or compressed from positioning and retractors (traction), or being accidentally cut or divided (transsection). These mechanical insults directly affect nerve fibers or their blood supply, leading to neuropraxia or more serious injury.

Thermal burn, while a real risk from energy devices, is not categorized here as a nerve-injury mechanism. It describes tissue damage from heat, which can affect nearby structures, but the classic mechanisms that directly injure nerves during these procedures are mechanical—positioning, traction, and division. Therefore, thermal burn is the option that is not a nerve-injury mechanism in this context.