What strategy helps prevent lens fog during laparoscopy?

What strategy helps prevent lens fog during laparoscopy?

• A. Pre-warming, anti-fog agents, lens irrigation, and maintaining stable insufflation to reduce condensation
• B. Increase insufflation pressure
• C. Do not pre-warm
• D. Use water to rinse lens

Answer: (A)

Preventing lens fogging is about controlling temperature, humidity, and airflow at the lens. Fog forms when a warm, moist inside environment meets a cooler lens, so matching the lens temperature to the inside and reducing condensation are key. Pre-warming the lens brings it up to body temperature, reducing the temperature difference that causes condensation. Anti-fog agents lower surface tension so moisture doesn’t bead up as droplets on the lens. Irrigating the lens physically clears any condensed film that does form. Keeping the pneumoperitoneum stable minimizes rapid gas flow and temperature shifts that can drive fogging. Increasing insufflation pressure can increase turbulence and isn’t a reliable fog-prevention method. Not pre-warming worsens fog, and rinsing alone helps temporarily but doesn’t prevent fogging. The combination of these steps effectively minimizes condensation and keeps the lens clear.