The Reasons Behind Laboratories Avoiding SST Tubes for Phlebotomy
Phlebotomy, the process of drawing blood from patients for diagnostic testing or medical purposes, is an integral part of healthcare. One of the most common tools used in phlebotomy is the serum separator tube (SST), which contains a gel that separates blood cells from serum. While SST tubes are widely used in the medical field, some labs choose not to use them for various reasons. In this article, we will explore why some labs opt not to use SST tubes for phlebotomy.
Cost considerations
One of the main reasons why some labs do not use SST tubes for phlebotomy is the cost involved. SST tubes are generally more expensive than regular blood collection tubes due to the added gel separator technology. Labs that have limited budgets may choose to use less expensive tubes to save on costs.
Compatibility with testing methods
Another reason why some labs do not use SST tubes for phlebotomy is the compatibility with testing methods. Some laboratory tests require specific types of blood collection tubes to yield accurate results. In such cases, labs may opt for tubes that are better suited for the particular testing method, rather than using SST tubes.
Types of tests
- Coagulation tests
- Enzyme tests
- Drug level tests
- Immunology tests
Interference with certain tests
While SST tubes are designed to separate serum from blood cells, the gel separator can sometimes interfere with certain laboratory tests. For example, the gel may absorb certain substances or alter the composition of the serum, leading to inaccurate Test Results. Labs that perform tests that are sensitive to such interferences may choose not to use SST tubes.
Sample volume requirements
SST tubes typically require a larger sample volume compared to regular blood collection tubes. Some labs may prefer to use tubes that require smaller sample volumes, especially when dealing with pediatric or elderly patients who may have limited blood volume to spare. In such cases, labs may opt for tubes that are more suitable for smaller sample volumes.
Storage and transportation considerations
Another factor that may influence labs to not use SST tubes is storage and transportation considerations. SST tubes containing gel separators require specific handling and storage conditions to maintain the integrity of the blood sample. Labs that do not have the necessary resources or infrastructure to properly store and transport SST tubes may choose alternative blood collection tubes that are more convenient to handle.
Preference for other tube types
Some labs simply have a preference for other types of blood collection tubes over SST tubes. This preference may be based on past experiences, ease of use, or availability of certain tube types. Labs that have established protocols using specific types of tubes may be hesitant to switch to using SST tubes, especially if the benefits do not outweigh the potential drawbacks.
Conclusion
While SST tubes are commonly used in phlebotomy for their ability to separate serum from blood cells, some labs choose not to use them for various reasons, including cost considerations, compatibility with testing methods, interference with certain tests, sample volume requirements, storage and transportation considerations, and preferences for other tube types. It is important for labs to carefully consider these factors and choose the most appropriate blood collection tubes for their specific needs and requirements.
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