Choosing the Right Blood Collection Tube for Diagnostic Tests: Understanding SST Tubes and Other Types of Tubes
Summary
- SST tubes are used for serum separation, while other types of blood collection tubes may be used for various purposes such as anticoagulation or plasma separation.
- The composition of SST tubes allows for the isolation of serum after centrifugation, making them ideal for certain laboratory tests.
- Understanding the differences between SST tubes and other types of blood collection tubes can help healthcare professionals choose the appropriate tube for specific Diagnostic Tests.
Serum Separation Tubes (SST)
Serum separation tubes, commonly known as SST tubes, are a type of blood collection tube used in healthcare settings for various Diagnostic Tests. These tubes are specifically designed to separate serum from whole blood, making them ideal for certain laboratory analyses. The composition and design of SST tubes differ from other types of blood collection tubes, allowing for efficient serum separation and accurate Test Results.
Composition of SST Tubes
SST tubes typically contain a gel separator at the bottom of the tube, which is specifically designed to separate serum from whole blood after centrifugation. The gel separator forms a physical barrier between the serum and the blood cells, preventing them from mixing during the centrifugation process. This separation allows for the isolation of serum, which can then be used for various laboratory tests.
Use of SST Tubes
Healthcare professionals use SST tubes for a wide range of Diagnostic Tests that require serum samples. These tests may include but are not limited to:
- Chemistry panels
- Liver function tests
- Lipid profiles
- Thyroid function tests
- Hormone assays
It is important to note that not all tests require serum samples, and healthcare professionals must choose the appropriate blood collection tube based on the specific requirements of the test.
Other Types of Blood Collection Tubes
In addition to SST tubes, there are various other types of blood collection tubes used in healthcare settings for different purposes. These tubes may contain additives that serve specific functions, such as anticoagulation or plasma separation. Understanding the differences between SST tubes and other types of blood collection tubes is essential for selecting the appropriate tube for specific Diagnostic Tests.
EDTA Tubes
Ethylene diamine tetraacetic acid (EDTA) tubes are commonly used for hematological tests that require whole blood samples. The EDTA additive in these tubes helps prevent blood clotting by chelating calcium ions, which are essential for the coagulation cascade. EDTA tubes are typically used for complete blood counts (CBCs), Blood Smears, and other tests that require an anticoagulated whole blood sample.
Heparin Tubes
Heparin tubes contain the Anticoagulant Heparin, which inhibits blood clotting by enhancing the activity of antithrombin III. These tubes are often used for tests that require plasma samples, such as coagulation studies, electrolyte panels, and some chemistry tests. Heparin tubes come in various forms, including lithium Heparin and sodium Heparin tubes, each with specific applications based on the test requirements.
Sodium Citrate Tubes
Sodium Citrate tubes are used for coagulation studies that require citrated plasma samples. The Sodium Citrate additive in these tubes binds calcium ions, preventing coagulation and allowing for accurate coagulation testing. These tubes are commonly used for Prothrombin Time (PT), Activated Partial Thromboplastin Time (aPTT), and other coagulation tests to assess a patient's hemostasis and clotting function.
Plain Tubes
Plain tubes, also known as serum tubes without gel separators, are used for various Diagnostic Tests that do not require serum separation. These tubes contain no additives and are suitable for tests that require whole blood, plasma, or serum samples without the need for additional processing. Plain tubes are often used for blood cultures, glucose testing, and other tests that do not require serum isolation.
Choosing the Right Blood Collection Tube
When selecting a blood collection tube for a specific diagnostic test, healthcare professionals must consider the following factors:
Test Requirements
Understand the specific requirements of the test, including the type of sample (whole blood, plasma, serum) and any additives or processing needed for accurate results.
Patient Conditions
Consider the patient's medical history, medications, and conditions that may impact the Test Results or the choice of blood collection tube.
Manufacturer Recommendations
Follow the manufacturer's guidelines for each blood collection tube to ensure proper specimen collection, handling, and processing for reliable Test Results.
By understanding the differences between SST tubes and other types of blood collection tubes, healthcare professionals can choose the most appropriate tube for each diagnostic test, ensuring accurate and reliable results for patient care.
Disclaimer: The content provided on this blog is for informational purposes only, reflecting the personal opinions and insights of the author(s) on phlebotomy practices and healthcare. The information provided should not be used for diagnosing or treating a health problem or disease, and those seeking personal medical advice should consult with a licensed physician. Always seek the advice of your doctor or other qualified health provider regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website. If you think you may have a medical emergency, call 911 or go to the nearest emergency room immediately. No physician-patient relationship is created by this web site or its use. No contributors to this web site make any representations, express or implied, with respect to the information provided herein or to its use. While we strive to share accurate and up-to-date information, we cannot guarantee the completeness, reliability, or accuracy of the content. The blog may also include links to external websites and resources for the convenience of our readers. Please note that linking to other sites does not imply endorsement of their content, practices, or services by us. Readers should use their discretion and judgment while exploring any external links and resources mentioned on this blog.