European Forum for Hospital Sterile Supply |
EFHSS Education
Recommendations by the Quality Task Group |
Recommendations | AK "Qualität" | ||||
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with kind permission of mhp-Verlag GmbH |
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[9] Cleaning and Disinfection in the Ultrasonic Bath (Part 2)In ultrasonic baths different energy fields are generated depending on the position of the ultrasonic transducers (figure 1). The specified level for filling the baths must absolutely be observed as this affects the energy input. Moreover, ultrasonic shadowing occurs depending on the quantity, shape and position of the sterile items and permit a more or less beneficial effect. In principle, inserts or mesh trays whose meshes are not too narrow should be chosen. These must be placed on the positioning rollers of the unit and under no circumstances directly on the floor of the bath. The mesh trays should not be overfilled. Nor should silicone mats be used as they impede the ultrasonic effect. The load should be chosen such that the mesh trays can be placed directly without reloading into the washer-disinfectors immediately after ultrasonic treatment. Jointed instruments should be opened and complex instruments may need to be dismantled, while observing the manufacturer's instructions. To achieve an optimal cleaning result, these LOADING INSTRUCTIONS must be strictly observed. The effect of disinfectants, and also the cleansing ultrasonic effect, depends on the extent of contamination and is adversely affected by extensive contamination. Therefore the baths should be regularly renewed. The FREQUENCY of renewal depends on how often the bath is used and on the degree of contamination. Baths with visible contamination should be renewed possibly several times each day. Otherwise, daily renewal is recommended. Normal drinking water can be used for the ultrasonic bath. But some manufacturers recommend the use of softened water or demineralised water. It has been demonstrated in practice that preference should be given to SOFTENED WATER.
Experience from the practical setting:
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What must be borne in mind when loading ultrasonic baths? THE LOADING INSTRUCTIONS must be observed. THE FREQUENCY of renewal of the baths must be determined. SOFTENED WATER should be given preference. Experience from the practical setting |
European Forum for Hospital Sterile Supply |
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