Which statement is true regarding debris in cryostat and flotation bath?

• A. A cryostat and a flotation bath must be kept free of debris.
• B. Only the cryostat must be free of debris.
• C. Only the flotation bath must be free of debris.
• D. Debris in these devices is acceptable.

Answer: (A)

Keeping equipment clean in cryosectioning and mounting is essential to prevent artifacts and contamination. Debris in the cryostat can abrade the knife, produce chatter, and introduce particulates into the frozen tissue, risking compromised sections. Debris in the flotation bath can become embedded in or adhere to the tissue as sections are lifted onto slides, causing staining artifacts and irregular surfaces. Since each device directly affects the quality and reliability of the slide, both must be kept free of debris. Therefore, debris in these devices is not acceptable; both need to be kept clean to ensure high-quality, artifact-free sections.