Phlebotomy Exam Prep 44, Plasma vs Serum — Key Differences

Phlebotomy Exam Prep 44, Plasma vs Serum — Key Differences

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 fundamental difference: Plasma contains fibrinogen because clotting is prevented with an anticoagulant, while serum lacks fibrinogen because the blood has clotted. - Why plasma from an anticoagulated tube (e.g., green top) is essential for STAT tests to ensure a rapid turnaround time, avoiding the 30-60 minute wait for a serum sample to clot. - How to identify the correct tube for each sample type: Anticoagulant tubes like lavender, green, or light blue tops yield plasma, whereas tubes with clot activators or no additives, such as red or gold SSTs, yield serum. - That specific tests require a specific sample; for example, coagulation studies (PT/INR) must use plasma to measure clotting factors, while other chemistry tests may require serum to avoid anticoagulant interference. - A helpful mnemonic to remember the difference: "Plasma Prevents Clotting, Serum Settles After." 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

Phlebotomy Exam Prep 43, Centrifugation Principles and Time

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 standard centrifugation setting for serum and plasma is 10-15 minutes at a Relative Centrifugal Force (RCF) of 1000 to 1300g. - Why Serum Separator Tubes (SSTs) must be allowed to clot for a full 30 minutes at room temperature before being placed in the centrifuge. - The critical importance of precisely counterbalancing the centrifuge to ensure sample integrity, prevent mechanical damage, and avoid creating biohazardous aerosols. - The absolute rule against re-spinning gel separator tubes and the associated risk of falsely elevated potassium levels. - How using the centrifuge's hard brake can disrupt cellular separation and lead to hemolysis, and why letting it coast to a stop is the correct procedure. 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

Phlebotomy Exam Prep 42, Specimen Transport Temperature Requirements

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 four key temperature requirements for specimen transport: room temperature (18-25°C), refrigerated (2-8°C), frozen (-20°C or below), and body temperature (37°C). - Critical examples for each category, such as routine chemistry at room temp, ammonia on ice, and cold agglutinins at body temperature. - The importance of allowing serum separator tubes to clot fully at room temperature before centrifugation to ensure sample integrity. - Proper shipping procedures for frozen samples, including the mandatory use of dry ice and the critical need to avoid freeze-thaw cycles. - How to identify exam traps related to time-sensitive and temperature-sensitive analytes that require immediate and specific handling post-collection. 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

Phlebotomy Exam Prep 41, Chilled Specimens — Ice Slurry

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 key analytes that require immediate chilling after collection, including ammonia, lactate, and ABGs. - Why metabolic processes like glycolysis can alter test results if specimens are left at room temperature. - The correct technique for chilling a specimen using an ice and water slurry for complete contact. - Common exam traps related to improper cooling methods, such as using only ice cubes. - How delays in chilling a specimen can compromise its integrity and lead to inaccurate 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

Phlebotomy Exam Prep 40, Light-Sensitive Specimens

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: - That light exposure causes photodegradation, which leads to falsely low test results for sensitive analytes. - The most common light-sensitive specimens you must know for the exam are bilirubin, vitamin A, vitamin B12, beta-carotene, and porphyrins. - The correct procedure for protecting a light-sensitive specimen is to use an amber-colored tube or to wrap the collection tube in aluminum foil immediately. - How exam questions may test this knowledge through direct identification or by presenting clinical scenarios involving erroneous results. - A common exam trap is confusing light protection with temperature requirements (chilled or warmed specimens) or forgetting that light exposure falsely lowers, not raises, the result. 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