Skip to main content

Table 1 Influence of procedure-related operative characteristics on microbial colony counts assessed by active sampling in working operating rooms

From: Factors influencing microbial colonies in the air of operating rooms

Variables

Number of samples n = 250 (%)

Mean bacterial count (cfu/m3)*

p-value

Surgery time# (mean ± SD)

 

2:53 ± 2:31

0.519

Surgery schedules

  

0.143

 regular surgery

220 (88.0)

76.4 ± 45.8

 

 urgent surgery

30 (12.0)

89.7 ± 53.1

 

Types of procedure

  

0.012

 general surgery

104(41.6)

67.0 ± 44.7

 

 urology surgery

32(12.8)

89.5 ± 43.9

 

 colorectal surgery

24(9.6)

69.6 ± 37.5

 

 neurosurgery

23(9.2)

80.0 ± 40.2

 

 plastic surgery

20(8.0)

82.5 ± 55.7

 

 orthopedics surgery

19(7.6)

92.5 ± 55.2

 

 thoracic surgery

16(6.4)

84.1 ± 52.9

 

 pediatric surgery

9(3.6)

115.0 ± 30.3

 

 transplant surgery

3 (1.2)

123.0 ± 59.8

 

Site of surgery

  

0.024

 superficial incision

97(38.8)

68.3 ± 46.4

 

 deep incision

54(21.6)

88.3 ± 47.0

 

 organ/space

99(39.6)

81.8 ± 45.8

 

Wound classification

  

0.061

 clean

132(52.8)

72.1 ± 45.7

 

 clean-contaminated

65(26.0)

88.3 ± 47.5

 

 contaminated

35(14.0)

73.3 ± 39.9

 

 dirty

18(7.2)

92.8 ± 58.0

 
  1. *cfu colony-forming units; #Surgery time = during incision to wound closure