Question

Identify the tubes needed to collect a APPT, Stat lytes, and BC in the proper order?

1) Red top, Green top, Lavender top
2) Green top, Red top, Lavender top
3) Lavender top, Green top, Red top
4) Red top, Lavender top, Green top

Answer 1

The correct order for collecting blood specimens for APPT, Stat lytes, and BC is option 3) Lavender top, Green top, Red top, which corresponds to tubes with EDTA, heparin, and no additive respectively.

Step-by-step explanation:

The question relates to the order of draw for blood specimen collection, specifically for tests requiring Activated Partial Thromboplastin Time (APTT), Stat electrolytes (Stat lytes), and blood cultures (BC). The correct order of draw is essential to prevent cross-contamination between tubes and to ensure accurate test results.

The proper order of draw is as follows:

1. Lavender top tube containing EDTA, which is used for hematological tests like APTT.
2. Green top tube containing heparin, used for chemistry tests including Stat lytes.
3. Red top tube, which is a non-additive tube used for blood cultures and other tests that do not require an anticoagulant.

Therefore, the correct sequence for collecting these specific specimens is option 3) Lavender top, Green top, Red top.