There are many methods to keep the life, environment and medical
instruments free from the bacteria or microorganisms. According to the material and the effect which we want to achieved,
we must choose the efficient method which ensure the sterilization or
disinfection is complete.
 |
| Sterile |
1) Heat Sterilization:
It is the simplest, most effective and cheap method. Use saturated steam above
100°c for 10-15 minutes. This procedure make the
bacteria protein coagulation, then can be achieved the sterilization effect. But the material should
tolerate the high heat, otherwise the material will be damaged.
2) Radiation Sterilization: Ultraviolet is
the good procedure for sterilization. After the ultraviolet irradiated,
the microorganism can’t produce the protein, then the microorganisms are killed
immediately and lose the capacity reproductive. But you must check the material
whether to be bad after the ultraviolet irradiated for a long time.
 |
| Unsterile |
3) Chemical disinfection:
Destruction the number of microorganism to
a level low enough that disease is unlikely to occur.
-Using 70% ethanol in water to 100% for
surface which denatures proteins of microorganisms.
-Use soap containing hexachlorophene to
wash the hands.
Finally, the different materials want to achieve complete sterility, we should choose the efficient methods, then can save the time, the cost and also protect the material stay the same.
References:
Sterilization methods and impact on electronics in medical devices , 7/8/2011 http://www.eetimes.com/document.asp?doc_id=1278906
