Table 2 Configuration and maintenance of terminal equipment on final rinse water for flexible endoscope in 290 medical institutions

Filter membrane device installed at the terminal of final rinse water (before water discharge)

 Yes

238

82.07

109

84.5

129

80.12

 No

52

17.93

20

15.5

32

19.88

Pore size of terminal filter membrane for final rinse water (n=238)

 0.1μm

40

16.81

19

17.43

21

16.28

 0.2μm

182

76.47

86

78.9

96

74.42

 0.4μm

10

4.20

0

0

10

7.75

 Other pore size

6

2.52

4

3.67

2

1.55

Replacement cycle of terminal filter membrane for final rinse water (n=238)

 Weekly

1

0.42

0

0

1

0.78

 Monthly

9

3.78

4

3.67

5

3.88

 Quarterly

78

32.77

40

36.7

38

29.46

 Half-yearly

34

14.29

21

19.27

13

10.08

 Yearly

51

21.43

22

20.18

29

22.48

 Replaced but not in a fixed cycle

62

26.05

21

19.27

41

31.78

 No replacement

3

1.26

1

0.92

2

1.55

Filter membrane replacement department (n=235)

 Third-party company

120

51.06

57

52.78

63

49.61

 Hospital equipment/general affairs/logistics department

100

42.55

46

42.59

54

42.52

 Replaced by the department

15

6.38

5

4.63

10

7.87

Is there a disinfection device at the terminal of the final rinse water

 Yes

153

52.76

73

56.59

80

49.69

 No

137

47.24

56

43.41

81

50.31

Number of terminal disinfection method types used for final rinse water (n=153)

 1

107

69.93

52

71.23

55

68.75

 2

34

22.22

15

20.55

19

23.75

 3

12

7.84

6

8.22

6

7.50

Type of terminal disinfection device for final rinse water (n =153)

 UV

65

42.48

27

36.99

38

47.5

 Ozone

55

35.95

23

31.51

32

40.00

 Chemical disinfection

89

58.17

50

68.49

39

48.75

 Other disinfection methods

2

1.31

0

0

2

2.50

Disinfection frequency of water supply pipeline

 Daily

5

1.72

3

2.33

2

1.24

 Monthly

25

8.62

12

9.30

13

8.07

 Weekly

27

9.31

16

12.40

11

6.83

 Quarterly

54

18.62

28

21.71

26

16.15

 Half-yearly

10

3.45

7

5.43

3

1.86

 Yearly

17

5.86

10

7.75

7

4.35

 Disinfect but not at a fixed frequency

51

17.59

23

17.83

28

17.39

 Not disinfected

101

34.83

30

23.26

71

44.10

Type of chemical disinfectant used for disinfection of water supply pipeline (n=189)

 Chlorine-containing disinfectant

91

48.15

37

37.37

54

60.00

 Peracetic acid

66

34.92

42

42.42

24

26.67

 Hydrogen peroxide

13

6.88

7

7.07

6

6.67

 Other chemical disinfectants (ozone, chlorine dioxide, acidified water, etc.)

19

10.05

13

13.13

6

6.67

Department for water supply pipeline disinfection (n=189)

 Third-party company

63

33.33

35

35.35

28

31.11

 Hospital equipment/general affairs/logistics department

79

41.80

46

46.46

33

36.67

 Replaced by the department

44

23.28

17

17.17

27

30.00

 Infection control department

3

1.59

1

1.01

2

2.22