NHA CCMA Exam Prep 81, Tube Filling Mixing and Specimen Integrity
Published: October 25, 2026
Duration: 2:57
This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams.
In this episode you will learn:
- The critical 9:1 blood-to-anticoagulant ratio in light blue (sodium citrate) tubes and why underfilling leads to rejected specimens for coagulation studies.
- The difference between gentle inversion (8-10 times for most additive tubes) and vigorous shaking, which causes hemolysis.
- The requirement for serum tubes (SST) to clot completely, typically for 30-60 m...