识别和预防由水生矿物质引起的手术器械表面改变.pdf

1、Identification and prevention of surface alterations on surgical Instruments caused by waterborne minerals Name:Dr.Matthias Tschoerner Affiliation:Chemische FabrikDr.Weigert GmbH&Co.KGHamburg(Germany)Working with the invisible chemicalWater Constituents and Influences on processing of Medical Device

2、sWater Qualities for processing of Medical DevicesCharacterization of surface alterations caused by Waterborne MineralsObjectiveWhen heating waternon-carbonatehardness remainsin solution,butcarbonate hardness leads to stubbornlime deposits.Water qualities&ingredientsothersolublese.g.silicic acidNa-,

3、K-saltsnon-carbonatehardness(other Ca-and Mg-salts)Total hardness=non-carbonate hardness+carbonate hardness200 mg CaCO3/l=50 mg/l +150 mg/lppm=mg/Lin-solublese.g.sand,rostcarbonatehardness(Ca-hydrogen carbonate&.Ca-Carbonate,Mg-hydrogen carbonate&.Mg-Carbonate)22 Nov 2024M.Tschoerner3UseTreatment at

4、 point of use TransportDisassembling Pre-cleaningCleaning&DisinfectionControl&MaintananceSterile PackingSterilizationSterile storageProvisionInstrumentscycleWater quality:Hardness,Silicic acid,Chloride,Heavy metalsExtraneous rustSteam quality:Silicic acid,Chloride,Heavy metalsExtraneous rustIngredie

5、nts of packingContact with saline solution22 Nov 2024M.Tschoerner4Constituents in water,which may cause problems in washer disinfectorsEvaporation residues high amount of minerals inthe water for cleaning andrinsing22 Nov 2024M.Tschoerner5Very thin layer of limestoneConstituents in water,which may c

6、ause problems in washer disinfectors22 Nov 2024M.Tschoerner6Heavy and non-ferrous metals(Iron,Manganese,Copper):Dark discolorations and deposits,inactivation of water softenerConstituents in water,which may cause problems in washer disinfectors22 Nov 2024M.Tschoerner7Silicic acid/silicatesStubborn y