Table 2 The analysis of the concentration number of particulate matter detected during the use of electrocautery knife at different time points.
From: Investigating surgical smoke in otolaryngology operating rooms
Sampling location | Particulate matter size | Detection time | Mean | Standard deviation | p-value |
|---|---|---|---|---|---|
Main knife range | 0.3 μm | Beginning of the knife used | 4.83*105 | 1.51*106 | *0.050 |
5–10 min after beginning | 2.12*105 | 7.83*105 | |||
0.5 μm | Beginning of the knife used | 2.12*105 | 8.21*105 | 0.133 | |
5–10 min after beginning | 9.96*104 | 3.60*105 | |||
5.0 μm | Beginning of the knife used | 1.80*103 | 4.58*103 | 0.304 | |
5–10 min after beginning | 2.97*103 | 1.33*104 | |||
Outside the operation table | 0.3 μm | Beginning of the knife used | 4.97*104 | 8.70*104 | †0.067 |
5–10 min after beginning | 2.13*104 | 6.47*104 | |||
0.5 μm | Beginning of the knife used | 1.02*104 | 1.38*104 | 0.165 | |
5–10 min after beginning | 6.48*103 | 1.82*104 | |||
5.0 μm | Beginning of the knife used | 3.91*102 | 4.67*102 | 0.200 | |
5–10 min after beginning | 5.30*102 | 7.73*102 |
