# Phlebotomy Exam Prep 4, Needle Gauge and Length Selection

Page: https://stenobird.com/podcast/nursing-healthcare-exam-prep-7652377/phlebotomy-exam-prep-4-needle-gauge-and-length-selection
Text version: https://stenobird.com/podcast/nursing-healthcare-exam-prep-7652377/phlebotomy-exam-prep-4-needle-gauge-and-length-selection.md
Podcast: [Nursing & Healthcare Exam Prep](https://stenobird.com/podcast/nursing-healthcare-exam-prep-7652377)
Published: 2026-05-01T22:25:11+00:00
Episode link: https://open-exam-prep.com/
Audio file: https://episodes.captivate.fm/episode/58840a32-bbaf-4133-b304-0141310fd364.mp3
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JSON: https://stenobird.com/v1/public/podcasts/nursing-healthcare-exam-prep-7652377/episodes/phlebotomy-exam-prep-4-needle-gauge-and-length-selection
Duration seconds: 172

## 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: - Why the 21-gauge needle is the standard for routine adult venipuncture. - When to select a 22-gauge needle for patients with smaller or fragile veins. - The appropriate use of a 23-gauge butterfly needle for difficult or pediatric draws. - How to remember the inverse relationship between gauge number and needle diameter with a simple mnemonic. - How incorrect needle selection, particularly using a gauge that is too small, can lead to hemolysis and compromised test results. 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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## Transcript

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