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ISE789 End of Semester Review. Course Projects. They are being graded. You can stop by my office on Monday to pick them up. What we have covered. Text on Healthcare Organization and structure Condition and methods Position papers Biology for engineers Disease and causes Bioengineering
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Course Projects • They are being graded. • You can stop by my office on Monday to pick them up.
What we have covered • Text on Healthcare • Organization and structure • Condition and methods • Position papers • Biology for engineers • Disease and causes • Bioengineering • Systems Engineering in Healthcare • Queueing models
Continued • Engineering for Medical Devices • Requirements • Anatomy • Biomechanics • Bio Inert • Bio active • Bactericidal metals and models • Silver and other bactericidal metals • Ions • Disinfectants and sterilization • Chapter posted two weeks ago • Methods and application
The Exam • Some multiple choice • Some short answers • Some problems • It will take you the entire time.
Sterilization and Disinfection ISE789 Dr. R. A. Wysk
Agenda • What are disinfectants? • How do we disinfect, sterilize and clean? • Why do we disinfect? • What are the processes that can be used?
Microorganisms • Some good • Some not so good • Sterilize – no living forms • Disinfect – remove certain life forms
Disinfect • Disinfectants are antimicrobial agents that are applied to non-living objects to destroy microorganisms, the process of which is known as disinfection. • Cleaning an article of some or all of the pathogenic organisms which may cause infection • A perfect disinfectant would also offer complete and full sterilization, without harming other forms of life, be inexpensive, and non-corrosive. • There are no perfect disinfectants.
The hows and how tos • Cause the minimal amount of disruption to human and physical environment. • Long or short life activities • Surgery • Alcohol • Betadine • Aldehydes
Autoclave A Front Loading Autoclave
Autoclave A Stove-top Autoclave
Ultraviolet Light • 260 nm light wave sources (UV lamps) • Effective for a variety of pathogens (bacteria, virus and fungus) • Poor penetration (limited to light permeable goods, like water) • Particulate, like dust, decrease the effectiveness • Light source must be cleaned routinely
Other methods • Infrared radiation • Microwaves • Gamma radiation • Filtration
Chemical Sterilants and disinfectants • Instruments that can not be sterilized using high temperatures may undergo a gas sterilization process such as ethylene oxide or other chemical germicides.
