Table 2.

The analysis of the concentration number of particulate matter detected during the use of electrocautery knife at different time points.

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

Unit: particles/ft³.

^†0.05 < p < 0.1,*p < 0.05.