Blood collection tubes are small, sterile, and usually vacuum-sealed glass or plastic tubes designed to hold a specific volume of blood. They are an essential tool in medical laboratories, used for collecting, storing, and transporting blood samples. These tubes often contain additives that facilitate clotting, prevent clotting, or preserve the sample for later analysis.

Rubber stoppers are integral to the design of blood collection tubes for several reasons:

1. Sealing the Sample: The primary function of Rubber stoppers for blood collection tubes is to create an airtight seal within the tube. This prevents contamination from external sources and ensures that the sample remains sterile.
2. Sample Integrity: By maintaining a sealed environment, rubber stoppers help preserve the integrity of the blood sample, preventing evaporation and maintaining the stability of the blood components.
3. Ease of Use: Rubber stoppers facilitate the ease of drawing blood into the tube. They can be punctured by a needle, allowing for the transfer of blood into the tube without the risk of spills or contamination.
4. Compatibility: Rubber stoppers are made from materials that are compatible with a wide range of chemicals and additives that may be present in blood collection tubes.
5. Safety: The use of rubber stoppers reduces the risk of needlestick injuries, as they provide a barrier between the needle and the user.