OSMT (Ontario Society of Medical Technologists) Practice Exam

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Which type of wrapping is not suitable for steam sterilization?

Muslin wrapped articles
Plastic wrapped articles
Foil wrapped articles
Unwrapped articles

The correct answer is: Plastic wrapped articles

Plastic wrapped articles are not suitable for steam sterilization because they can melt or deform at the high temperatures and pressures used in the steam sterilization process. Steam sterilization typically requires materials that allow moisture to penetrate and ensure effective sterilization. Muslin wrapped articles are specially designed for steam sterilization as they are breathable, allowing steam to permeate and contact all surfaces. Foil wrapped articles are not ideal either, but their use may depend on specific conditions related to the sterilization cycle; however, they can be problematic as they inhibit steam penetration. Unwrapped articles are also inappropriate for steam sterilization as they do not provide the necessary barrier to prevent contamination before use. Choosing the correct wrapping is vital to achieving successful sterilization, and plastic wrapping fails to meet essential criteria related to heat tolerance and moisture permeability.