Definition: It
is a pressurized device designed to heat aqueous solutions above their boiling
point to achieve sterilization.It was invented by Charles chamber land in 1879.
Principles:
a)
At
atmospheric pressure water boils at 100 c.
b)
With
the rise of pressure the bolinig point of water also rises.
c)
Steam
under pressure unmixed with air has more tem than the mixed with air.
d)
Steam
under pressure has more penetrating power.This is due to the fact that steam.
Advantage:
a) It is the best method of sterilization as
bacteria,virus,Parasite, fungus including the spore are killed.
b) Modern portable autoclave can be used any where if
there is supply of electricity and distilled water.
c) There is no churring of cotton materials.
d) Correct temperature pressure and the holding time can
be achived.
Disadvantage:
a) Culture media containing the egg and serum can’t be
sterilized because the heat can denature the protein of the serum and the egg.
b) Powder,grease and oil can’t be sterilized by the
autoclave.
c) Sharp surgical instrument can’t be sterilized because
the sharpness may be destroyed due to the effect of the steam.
মন্তব্যসমূহ
একটি মন্তব্য পোস্ট করুন