Carts in a buffer room should be constructed from which of the following materials?

Carts in a buffer room should be constructed from smooth impervious materials such as stainless steel because these materials are non-porous, easy to clean, and resistant to microbial contamination. In a sterile compounding environment, maintaining cleanliness and preventing contamination are paramount, particularly since these spaces are critical for preparing sterile products.

Stainless steel does not harbor bacteria and can withstand regular disinfection processes necessary in a sterile compounding area. Its durability and resistance to corrosion also ensure that the carts will maintain their integrity over time, reducing the risk of contamination from degraded materials.

In contrast, materials like wood can absorb liquids and provide a surface for bacterial growth, while aluminum may not withstand repeated cleaning with certain disinfectants and could corrode. Options such as vinyl and cardboard are not suitable as they can easily be damaged, do not provide a smooth surface for cleaning, and can harbor microbes. Glass and rubber also present challenges; glass can break and rubber can degrade, both leading to potential contamination issues. Thus, the choice of stainless steel meets the high standards necessary for sterile compounding practices.