Different Vacutainer Types and Their Uses Explained

Blood collection tubes have a central role in various medical diagnostic tests. After blood sampling, the storage, processing and handling of the specimen depends on the collection methods and tools used. Accordingly, there are different vacutainer types intended for different tests and sampling methods. Mixing up of vacutainer tubes for different tests can lead inaccurate diagnostic results, which will compromise the quality of healthcare.

Healthcare professionals, phlebotomists and laboratory personnel involved in blood sampling must learn about different types of vacutainers and their uses, handling instructions to ensure accurate sample collection, preservation, and analysis.

Vacutainer Types and their Uses

Tube Color	Common Uses
Red	Serum chemistry tests, serology, blood bank testing, hormone tests.
Gold (SST)	Serum chemistry tests, serology, therapeutic drug monitoring.
Light Blue	Coagulation tests (e.g., PT, PTT, INR), fibrinogen levels.
Green	Plasma chemistry tests, blood gas analysis, ammonia and lactate levels.
Lavender	Haematology tests (e.g., CBC, blood smears), erythrocyte sedimentation rate (ESR).
Gray	Glucose testing, blood alcohol levels, lactate, creatinine clearance.
Light Green	Plasma chemistry tests, ammonia levels, heparin monitoring.
Yellow	Blood cultures (SPS), genetic and DNA testing (ACD), viral load testing.
Royal Blue	Trace element testing (e.g., zinc, copper, lead), toxicology screening, nutritional studies.
Tan	Lead testing, heavy metal testing.
Pink	Blood bank testing (e.g., crossmatching), HbA1c (glycated haemoglobin).
Black	Westergren sedimentation rate (ESR), citrate levels.
Orange	STAT serum chemistry tests (for rapid clotting), vitamin D levels.
White (PPT)	Molecular diagnostic tests (e.g., PCR), viral RNA and DNA testing, chimerism analysis, prenatal genetic testing.

Sourcing Vacutainer Tube Types

Most vacutainer types are manufactured by companies like BD, Greiner Bio-One, and Sarstedt. They adhere to standards such as ISO 6710 for dimensions and performance, ensuring reliability.

Vacutainer tube types follow functional standards set by bodies like the Clinical and Laboratory Standards Institute (CLSI), International Organization for Standardization (ISO), U.S. Food and Drug Administration (FDA), European Committee for Standardization (CEN), and International Council for Standardization in Haematology (ICSH) depending on the country. In India, ICMR (Indian Council of Medical Education) is the regulatory body.

The colour coding can vary from one country to the other because of different standards. However, the functionality remains the same. The diverse colour-coded system, combined with stringent manufacturing standards, contributes significantly to efficient and accurate diagnostic procedures.

Things to Consider for Different Types of Vacutainer Tubes

Sizes: Vacutainer tubes come in various sizes to accommodate different blood volume requirements, ranging from paediatric sizes to larger tubes for adult collections.

Materials: These tubes are typically made of glass or plastic, with plastic being more common due to its safety and ease of use.

Safety Features: Many vacutainer tubes come with safety features, such as needle shields or caps, to prevent accidental needle sticks.

Compatibility: It's important to ensure that the tubes are compatible with the collection needles and equipment being used to prevent issues during blood collection.

Storage and Handling: Proper storage and handling of vacutainer tubes are crucial to maintaining sample integrity and ensuring accurate test results. Tubes should be stored according to manufacturer instructions, and proper disposal methods should be followed.

Quality Control: Manufacturers implement strict quality control measures to ensure that vacutainer tubes meet regulatory standards and maintain their effectiveness.

Cost and Availability: The cost and availability of vacutainer tubes can vary depending on factors such as brand, size, and material. It's important to choose tubes that meet both your budget and your specific testing needs.

Environmental Impact: With an increasing focus on sustainability, some manufacturers are developing eco-friendly vacutainer tubes that reduce waste and environmental impact.

Handling Conditions for Different Types of Vacutainers

Here are some common handling conditions for the storage and transportation of different types of vacutainer tubes:

Storage

• Store vacutainer tubes at the recommended temperature range, typically between 18°C-25°C (64°F-77°F) for most tube types.
• Refrigerate tubes containing anticoagulants like EDTA, heparin, or citrate after collection if not processed immediately.
• To prevent glycolysis, keep glucose tubes (grey-top) at room temperature and process them.
• Avoid exposing tubes to extreme temperatures or direct sunlight.
• Follow specific storage instructions provided by the manufacturer for each tube type.

Transportation

• Use appropriate insulated containers or coolers to maintain the required temperature during transportation.
• Pack tubes securely to prevent breakage or spillage.
• Keep incompatible tube types separate. For example, sodium citrate and EDTA tubes should not mix. This prevents cross-contamination.
• Include absorbent materials in the container to contain any potential leaks.
• Label the containers clearly with appropriate biohazard symbols and handling instructions.
• Follow local, state, and federal regulations for the transportation of biological specimens.

General Handling Instructions

• Handle vacutainer tubes with care, treating them as potential biohazards.
• Wear appropriate personal protective equipment (PPE) when handling blood samples.
• Properly label tubes with patient information, date, and time of collection.
• Mix the tubes gently by flipping them or shaking them by hand. Do this as the manufacturer instructs. It ensures that the anticoagulant mixes well.
• Centrifuge tubes at the recommended speed and duration, if applicable.
• Follow SOPs and lab protocols. They cover handling, processing, and disposal of blood tubes.

Which One Should You Choose

When selecting the appropriate vacutainer tube for blood collection, look at the specific tests or analyses required. The colour-coding system serves as a convenient reference, but one should also consider the tube's additives, anticoagulants, and intended use.

Healthcare professionals should carefully review the patient's clinical history, ordered tests, and any special handling requirements. Consulting laboratory guidelines, manufacturer instructions, and established protocols can also guide the right choice of the tube.

Conclusion

In conclusion, proper selection and handling of vacutainer types is crucial for accurate diagnostic testing and patient care. Those who are on the frontline of diagnostics must stay updated on the latest guidelines, standards, and best practices to ensure reliable blood sample collection. Storage, processing, analysis of blood samples, everything comes together for improved clinical outcomes.