# Phlebotomy Exam Prep 3, Evacuated Tube System Components

Page: https://stenobird.com/podcast/nursing-healthcare-exam-prep-7652377/phlebotomy-exam-prep-3-evacuated-tube-system-components
Text version: https://stenobird.com/podcast/nursing-healthcare-exam-prep-7652377/phlebotomy-exam-prep-3-evacuated-tube-system-components.md
Podcast: [Nursing & Healthcare Exam Prep](https://stenobird.com/podcast/nursing-healthcare-exam-prep-7652377)
Published: 2026-04-30T22:25:11+00:00
Episode link: https://open-exam-prep.com/
Audio file: https://episodes.captivate.fm/episode/a26b792a-292c-4f70-9008-5591044687be.mp3
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Duration seconds: 178

## Resource

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 three core components of an evacuated tube system are the holder, the double-ended needle, and the vacuum tube. - The pre-calibrated vacuum inside each tube is crucial for drawing the correct blood volume, ensuring a proper blood-to-additive ratio. - The multi-sample needle features a rubber shut-off valve on the shorter end to prevent blood leakage between tube changes. - The entire needle and holder assembly is a single-use device and must be disposed of as one intact unit into a sharps container. - Common exam traps include questions about incorrect disposal procedures, like recapping or disassembling the device, and misidentifying the cause of a short draw, which is typically a loss of vacuum. For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep

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