Figure 3
From: Investigating surgical smoke in otolaryngology operating rooms
The variation in the average concentration of the PM. Horizontal axis: 1. Before the operation; 2a. Beginning of the operation in the main knife range; 2b. Beginning of the operation outside the operating table; 3a. After 5–10 min in the main knife range; 3b. After 5–10 min outside the operating table; 4. At the end of the operation; 5. Outside the operating room.
