Fig. 1.

A: materials of our homemade smoke filtration system. B: connection between the filter, the operating trocar and the suction system. C: Here is our homemade smoke filtration system assembled in clinical use.

We developed two closed systems depending of the type of available filter. The principle of the filtering system is the same: a male-to-male connector is connected between the trocar and the filter. The filter is then connected to the suction container via a vacuum rubber tube. We can easily evacuate the surgical smoke in this closed system by opening the flow stopcock of the trocar.