|
 Synthesis of the evaluation report of the Sterinis® process for the disinfection of units of care in a large University hospital (Oslo/Norway)
The evaluation of Sterinis® done in a large University hospital (Oslo/Norway) was carried out on five sites presenting five different situations so much in term of risk (block of surgery) than of difficulty of disinfecting (ambulances).
The selected strain "Bacillus Subtilis" is a positive gram bacterium of stick type forming endospores with a short division cycle. This sporulated form makes this bacterium able to survive and to develop in an even not very nutritive environment.
The results are presented for each situation. The tables present for each point of measurement, the quantity of spores deposited (first line), the number of spores remaining after disinfection (second line). The third line corresponding to control of the deposit.
|
Sealed (tapes) room of 58 m3 . |
Disinfection efficiency |
|
Number of spores put |
6 |
|
Growth: Number of remaining spores after disinfection |
0 |
|
0-Growth : Number of destroyed spores |
6 |
100% |
|
Spores put outside medical apparatus, on surfaces, wall, floors, ceiling.
Sealed (tapes) room of 40 m3. |
Disinfection efficiency |
|
Test N° |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
|
Number of spores put |
5 |
5 |
5 |
5 |
10 |
12 |
12 |
11 |
13 |
34 |
34 |
|
Growth: Number of remaining spores after disinfection |
0 |
3 |
3 |
3 |
0 |
2 |
1 |
3 |
0 |
4 |
2 |
|
0-Growth : Number of destroyed spores |
5 |
2 |
2 |
4 |
10 |
10 |
11 |
8 |
13 |
30 |
32 |
86,9% |
|
Spores put inside the medical apparatus (with or without ventilation).
Sealed (tapes) room of 40 m3. |
Disinfection efficiency |
|
Test N° |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
|
Number of spores put |
13 |
13 |
13 |
19 |
12 |
12 |
12 |
13 |
11 |
26 |
26 |
|
Growth: Number of remaining spores after disinfection |
2 |
8 |
9 |
9 |
9 |
8 |
7 |
5 |
0 |
15 |
14 |
|
0-Growth : Number of destroyed spores |
11 |
5 |
4 |
10 |
3 |
4 |
5 |
8 |
11 |
11 |
12 |
49,4% |
|
Sealed (tapes) room of 40 m3 with medical equipment. The room is hermetically closed (tapes) but with internal ventilation by ventilator |
|
|
test 1 |
test 2 |
test 3 |
Disinfection efficiency |
|
Number of spores put |
9 |
9 |
9 |
|
|
Growth: Number of remaining spores after disinfection |
0 |
0 |
0 |
|
0-Growth : Number of destroyed spores |
9 |
9 |
9 |
100% |
|
Ambulance disinfection (open doors)
via disinfection of a garage of 120 m3 |
Disinfection efficiency |
|
Number of spores put |
12 |
|
|
Growth: Number of remaining spores after disinfection |
0 |
|
0-Growth : Number of destroyed spores |
12 |
100% |
|
Eye-surgery sections disinfection |
Without outside air exchange during disinfection |
* With outside air exchange during disinfection |
|
test |
1 |
2 |
3 |
4 |
Disinfection efficiency |
5 |
6 |
7 |
Disinfection efficiency |
|
Number of spores put |
3 |
3 |
6 |
6 |
6 |
3 |
3 |
|
Growth: Number of remaining spores after disinfection |
0 |
0 |
0 |
0 |
6 |
3 |
3 |
|
0-Growth : Number of destroyed spores |
3 |
3 |
6 |
6 |
100% |
0 |
0 |
0 |
0% * |
For each situation, cycle parameters selected are indicated.
The results highlight the principal following points:
-
Sterinis® is a device making possible to diffuse a disinfecting dry mist in all the volume of the room, even in not directly accessible areas (see results of the test on the ambulances).
-
Sterinis® is adapted to medical devices disinfection present in the treated room (see results of the test in block of surgery).
-
Sterinis® makes possible to reach a very high level of disinfection respecting the standards applied in the establishments of health.
Evaluation report's Chief doctor & hospital hygienist MD Bjorg Marit Andersen from ULLEVÂL hospital University Center : Published abstract (ECCMID 2005)
|
