Prevention of nosocomial infections
The MoveoSiphon ST24 is a CE-certified disinfection system for sink drains in clinical sanitary areas. Its continuous and fully automatic disinfection process prevents the production of infectious bio-aerosols and thus the transfer of pathogens from the wash basin to the patient.
In the process the following functional processes interact:
Continuous physical-thermal disinfection
Electromechanical vibration cleaning of the inside walls of the siphon
|Bacterial content Sink drain||105-1010 CFU/ml bacteria, of which
103-106 CFU/ml gram-negative rods
|0 – 500 (max. 103) CFU/ml|
|Biofilm formation||Starts after a few days||Is prevented completely and permanently|
|Emission into environment following water inflow||Up to 439 CFU/1000 l air||No detectable emissions|
|Patient colonisation rates||20 – 40 %||5 – 10 %|
Bacterial contamination and proliferation in seal water of wash basin processes
|Without disinfection||Chemical disinfection / biocide treatment||Disinfecting / cleaning with MoveoSiphon|
Continuous increase in the live bacteria content (CFU/ml) in the sealing liquid of the odour trap
Discontinuous bacteria reduction in the sealing liquid of the odour trap (usually 5 log-steps)
Continuous, maximum bacteria reduction in the entire odour trap at temperatures of ~85°C (7 log-steps in 30 minutes).
|If a contaminated odour trap is replaced with a factory-new standard siphon, what one can observe after only a few days is again a biofi lm generation and a live bacteria count in the sealing liquid that is equivalent to that of the replaced siphon.||After each biocide treatment, recontamination occurs after just a few hours as a result of:
The chemical disinfectant only reduces the bacteria count in the siphon temporarily and must therefore be repeated on a regular basis.
|No new or re-germination
*VBNC = viable but not culturable, state of reduced metabolic activity as response to stress (e.g. malnutrition, disinfection, low temperature), under more
favourable environmental conditions, bacteria may return to full viability and infectivity. 3
Bacteria in the siphon and formation of infectious bioaerosoles
|The bacteria count development in the standard siphon without disinfection is equivalent to a growth curve
||The bacteria count development in the standard siphon with chemical disinfection/biocid treatment is equivalent to a sawtooth wave.
||The bacteria count development in the MoveoSiphon with sonothermal disinfection is equivalent to a steep reduction curve with persistent curve progression from 0 to max. 103 C FU/ml.
|After a few days (no more than 2-3 weeks), the bacteria count in the sealing liquid of the new, untreated odour trap has exceeded the critical volume (103 CFU/ml). Despite proper use of the washing station, infectious bioaersols develop.
||The critical bacteria count for the bioaerosol generation (103 CFU/ml) is again exceeded after a short period of time and the bacteria count may even be higher than the original bacteria count of the previous disinfection if disinfectant-tolerant bacteria are selected.
||As a result of the continuous disinfecting and cleaning process, the critical bacteria count for the bioaersol generation permanently drops below 103 CFU/ml. Thus, the aerosoles formed at the washing
station are not infectious.
Only correct siphon testing leads to conclusive results
Take samples from the sealing fluid, because:
- Bacteria that temporarily adhere to the interior walls of the drain valve are irrelevant for the emission from the odour trap and the epidemiological success of the disinfecting measures.
- There is no direct dependency between the number of emitted microorganisms and the live bacteria count of the sealing liquid.
Take samples using a sterile disposable pipette that is dipped into the sealing liquid directly without touching the washbasin and drain.
Take controlled samples – do not test immediately after washing hands or eliminating waste to allow the disinfection to work.
The problem zone
Sink drains under wash basins in clinics and hospitals are open pathogen reservoirs and sources for emitting bacteria.
They contain on average 105-1010 CFU/ml of bacteria, including 103-106 CFU/ml of gram-negative rods.
Water flowing into the sink drain produces aerosols on the surface of the seal water which can emit the bacteria up to a distance of 1.5 metres around the siphon.
In case of bacterial contamination of the seal water of >105 CFU/ml so many micro-organisms are carried into the air in the room that a measureable transmission of bacteria from the seal water to the hands of patients or staff takes place.
Numerous clinical investigations prove: conventional sink drains do not fulfi l the high hygiene standards needed in invasive intensive care.
The MoveoSiphon operating function
The thermo disinfection carried out by the MoveoSiphon fulfils at least the standards of the technical process of pasteurization by means of heating (10 to 15 seconds at 85°C). In the process the unit heats up to the set temperature (85°C) and slowly cools down while the subsequent vibration cleaning takes place. Once the minimum set temperature has been reached (75°C), the heating process and thus the disinfection cleaning cycle recommences once again. If no interruption is caused by additional water inflow, then the entire process is completed after 5-6 cycles in a period of approximately one hour and the MoveoSiphon switches into standby mode until water flows in again.
Good reasons for using the MoveoSiphon ST24
The continuous disinfection of the siphon is carried out without using chemicals. You are doing something not only for the benefit of your patients, but also for the environment.
The MoveoSiphon disinfects the seal water in sink drains continuously and automatically by means of thermal disinfection.
The electromechanical cleaning of the inside walls of the siphon prevents the development of biofilms.
MoveoSiphon achieves a 7-log stage reduction in bacteria. The bacteria in the siphon water are reduced by 99.99999%.
Thanks to the unique operating principle, the bacteria are already effectively reduced after the first disinfection cycle.
Patient colonisation and the incidence of nosocomial infections by waterborne bacteria are reduced by 50-70%.
By utilizing the MoveoSiphon you can reduce the need for antibiotics by approximately 30%, and the days of isolation for patients by approximately 35%.