Intravenous lidocaine reduces the propofol EC50 for loss of consciousness and intraoperative anesthetic consumption in gynecological laparoscopy: A randomized controlled trial .

In 30 seconds

This randomized controlled trial evaluated the effects of intravenous lidocaine on propofol requirements in 60 patients undergoing gynecological laparoscopy. The study found that the median effective concentration (EC50) of propofol for loss of consciousness was significantly lower in the lidocaine group (3.32 µg/mL) compared to the saline group (3.89 µg/mL), indicating reduced anesthetic consumption.

Key findings

• The EC50 of propofol for loss of consciousness was 3.32 µg/mL in the lidocaine group versus 3.89 µg/mL in the saline group.
• Patients receiving lidocaine required less propofol at 8.62 mg·kg-1·h-1 compared to 9.89 mg·kg-1·h-1 in the saline group.
• Remifentanil consumption was also lower in the lidocaine group at 0.23 µg·kg-1·min-1 versus 0.27 µg·kg-1·min-1 in the saline group.

Why it matters

The findings suggest that intravenous lidocaine can effectively reduce the required doses of propofol and remifentanil during gynecological laparoscopy, potentially leading to improved patient outcomes and reduced anesthetic-related side effects.