Which of the following is a reason discrete analyzers are named as such?

• A. They use dry slide technology
• B. They use continuous flow
• C. They require large sample volumes
• D. They rely on wet chemistry

Answer: (A)

Discrete analyzers are designed to process each test in a separate reaction unit, so every specimen is analyzed in its own isolated environment. A defining feature that embodies this approach is dry slide technology: reagents are dried onto a slide and rehydrated by the introduced sample, allowing many individual tests to be run in parallel without mixing fluids from different tests or samples. This contrasts with continuous-flow systems, where reagents and samples move together through channels in a single stream. Large sample volumes aren’t inherent to discrete systems, and wet chemistry describes a broad approach rather than the specific isolated, slide-based format. So dry slide technology best captures why these instruments are called discrete.