手术器械损伤调查：如何确保您的投资得到保护（英文版）.pdf

1、Investigating Surgical Instrument Damage:How to ensure your investment is protectedName:Matthias TschoernerAffiliation:Chemische Fabrik Dr.Weigert GmbH&Co.KG,HamburgTopics Types of corrosion Instrument damage by corrosion Common causes and influencing factors Examples from praxis,prevention and corr

2、ection17/10/2025 Tschoernerwfhss 20252Types of corrosion Pitting corrosion Wear/fretting corrosion Stress corrosion Foreign and flash rust/secondary rust Crevice corrosion Surface corrosion Contact corrosion17/10/2025 Tschoernerwfhss 20253Most common types of corrosionType of corrosion,appearance Pi

3、tting corrosionPinhole like black points with rainbow colored surrounding or rust Wear/fretting corrosionScoring and scratches,most in joints Reason and influencing factors Chlorides,moisture,temperature,time,MaterialConstruction,insufficient carewith oil,Material17/10/2025 Tschoernerwfhss 20254Most

4、 common types of corrosionType of corrosion,appearance Stress corrosionStress cracking and fractures,often on joints or proximal end of forcepsForeign or flash rust/secondary rustSpot like up to uniform brownish discolorationCrevice corrosionRust within cavitiesSurface corrosionUniform discoloration

5、Contact corrosionSpot like brownish discolorationReason and influencing factors Material stresses,material,temperature,chlorides Processing unalloyed steels and/or corroded steels,water rust contaminatedMedium,temperature,time,gap width,materialMedium,temperature,time,materialMedium,different materi

6、als in contact17/10/2025 Tschoernerwfhss 20255Pitting corrosionAction mode:Halides esp.chlorides penetrate the passive layer of stainless steel Corrosion starts within minutesSources:Isotonic solution(i.e.physiologic saline)Blood,saliva,and secretion Water for processingInfluencing factors:Temperatu