Reading Part B02

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Questions count: 1
Passing grade: 3
Time limit: 3 minutes
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B02. Why are autoclaves better than boiling water sterilisers?

Autoclaves and Sterilizers

Sterilisation is the killing of microorganisms that could harm patients. It can be done by heat (steam, air, flame or boiling) or by chemical means. Autoclaves use high pressure steam and sterilisers use boiling water mixed with chemicals to achieve this. Materials are placed inside the unit for a carefully specified length of time. Autoclaves achieve better sterilisation than boiling water sterilisers. Heat is delivered to water either by electricity or flame. This generates high temperatures within the chamber. The autoclave also contains high pressure when in use, hence the need for pressure control valves and safety valves. Users must be careful to check how long items need to be kept at the temperature reached.

Heat is transferred to water by electricity or flame.

Water sterilisers do not ensure as much sterilisation as autoclaves do.

Autoclaves generate high temperatures within the chamber.