What are the different types of blood collection tubes?

What are the different types of blood collection tubes?

You would be wondering how all the phlebotomists carry a wide range of blood samples sorted. There are some primary ways, which are related to testing tubes. The caps of testing tubes help to categorize blood and other samples in the medical world. Their caps are of different colors and each color has a unique significance for a specific type of testing.

There are mainly eight types of test tubes for blood collection in the industry. That is a big chunk and all the hospitals and laboratories have a huge demand for disposable blood test tubes. They have to stay connected with a blood collection tube providers who can sell them with a timely supply.

These blood collection tubes have various sizes, which usually range from 3ml to 10ml usually. Also, they are available in plastic and glass materials. Some tests require plastic ones and some require only glass tubes for precise results. Since microorganisms play a crucial role in it, these tubes also contain additives to control the clotting of blood. Some are preventives and some are accelerators of clotting. You can learn all about them below. 

Blood Collection Tubes With Different Color Caps And Their Applications

Here are eight types of testing tubes, which have different categories according to a sample of blood. There are various diseases and tests for them, where, and these collection tubes have a specific purpose. From CBC to flu, they will cover everything. However, we have not included all the diseases and tests, since we want to make you understand in the simplest way.

Red Cap Tubes

The first one is the red-top tube, which is widely used in the medical industry for testing purposes. There are no additives in them and they are used for general blood tests. Moreover, the main reason for using them is for toxicology for the testing of hormones. Phlebotomists use these red-top tubes for blood serum collection to conduct tests like TCA (Total Complement Activity), cryoglobulins, etc. 

Light Blue Cap Tubes

These blue-top tubes are used for coagulation tests to measure blood clotting performance. There are various diseases where these test tubes are specially used to carry blood samples. They contain sodium citrate as an anticoagulant or clotting-resistant agent. This additive works to prevent blood clotting in the tubes before the analysis. Phlebotomists use them to conduct PTT (Partial Thromboplastin Time), TCT (Thrombin Clotting Time), etc. 

Purple Or Pink Cap Tubes

The next is the purple-top tube, which is used for Hematology like AGT, ESR, etc. Various test samples are carried out to analyze blood grouping, CBC, blood donor screening, etc. Many laboratories use them before blood donation and blood-related diagnosis. These purple-top tubes contain EDTA (Ethylenediaminetetraacetic acid) as an additive. This EDTA works as an anticoagulant to prevent blood clotting inside the tube. 

Dark Green And Light Green Cap Tubes

Green-top tubes are available in two types, i.e., light green and dark green. If we talk about the dark green type, phlebotomists use them for virology. They carry heparinized plasma to measure ammonia and insulin levels in the blood. These tubes also have additives like sodium heparin or lithium heparin to prevent the clotting of blood. While light green is a plasma separator to separate heparinized plasma from the blood. There are various types of analysis of blood levels via light green tubes.

Dark Blue Cap Tubes

Dark blue top tubes have two types, non-additive and additive. In additive type, they contain sodium heparin or EDTA as a chelating agent to hold metal ions in the blood. The main purpose of using these dark blue tubes is toxicology. Phlebotomists study blood samples to detect heavy metals, drug levels, trace elements, etc. Also, they can contain urine, saliva, and hair samples for better analysis.  

Grey Cap Tubes

They are used for the analysis of blood sugar levels, sugar tolerance, etc. They also contain additives like potassium oxalate or sodium fluoride as an antiglycolytic agent. These antiglycolytic agents help to preserve glucose in the blood for better results. Many patients in the world have to get these tests conducted and these tubes help to separate blood samples of sugar levels well.

Golden Cap Tubes

This second last type is the golden-top tube, which contains a clot activator or serum-separating gel as an additive. They are used for various testing related to liver issues mainly. Likewise, they are for serology (antibodies test) for the detection of HIV and hepatitis in a body. Many urologists and phlebotomists use these tubes to keep samples separated from other types for concise results. 

White or Pearl Cap Tubes

The last is the white or pearl-top tube. This type contains EDTA and separating gel as an additive to prevent blood clotting. They are very common and were heavily used during COVID-19 testing. These tubes are used for conducting tests like PCR, adenovirus (common flu), toxoplasma, herpesvirus, etc. All the test samples in white or pearl-cap tubes are just for flu-related viruses. 

We hope that you have finally learned about these test tubes. It will certainly help you connect with a disposable blood collection tube manufacturer in the world for wholesale purchases. Due to the immense usage of these tubes, you will have to order in bulk with massive sizes.