Tubo de recogida de sangre
Blood collection tube - Imagen 2
Blood collection tube - Imagen 3
Blood collection tube - Imagen 4
Blood collection tube - Imagen 5
Blood collection tube - Imagen 6

Tubo de recogida de sangre

Moreover, the interior of the tubes may be coated with various substances. For example, some are lined with anticoagulants like heparin, which prevents the blood from clotting and is suitable for tests that require whole blood, such as blood gas analysis. Others contain clot activators that speed up the clotting process, facilitating the separation of serum for biochemical assays. The tubes are also color – coded, with each color representing a specific additive or intended use, allowing for easy identification and proper handling in a busy laboratory environment.

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Structure and Components

  • Tube Body: Made of medical-grade glass or plastic (e.g., PET), typically cylindrical with a sealed bottom and an open top covered by a rubber stopper.
  • Stopper: Color-coded to indicate different additives or purposes (e.g., red, purple, blue, green), ensuring quick identification. The stopper is airtight to maintain sample integrity.
  • Vacuum System: Pre-vacuumed to draw a specific volume of blood (e.g., 5 mL, 10 mL) when the needle is inserted, eliminating the need for manual suction.

Key Features and Functions

  • Additives (Depending on Type):
    • Anticoagulants:
      • Heparin (green stopper): Prevents clotting by inhibiting thrombin, suitable for plasma-based tests (e.g., chemistry panels).
      • EDTA (purple stopper): Chelates calcium ions, used for hematology tests (e.g., complete blood count, CBC).
      • Sodium citrate (blue stopper): Binds calcium, essential for coagulation studies (e.g., PT, aPTT).
    • Clot Activators:
      • Silica particles or glass beads (red/yellow stopper): Accelerate clotting for serum separation (e.g., blood chemistry, immunoassays).
    • Gel Separators:
      • Thixotropic gel (often in red or gold stoppers): Settles between serum/plasma and cells during centrifugation, maintaining sample layers.
  • Labeling: Pre-printed with patient information fields (name, ID, date), barcode for tracking, and additive type.

Usage Scenarios

  • Clinical Diagnostics: Blood tests for routine check-ups, disease monitoring, or emergency medicine.
  • Research Labs: Sample collection for biomedical studies, clinical trials, or genetic analysis.
  • Blood Banks: Temporary storage of blood donations before processing.

Standards and Safety

  • Complies with international standards (e.g., ISO 15189 for medical laboratories).
  • Designed to minimize hemolysis (red blood cell rupture) and contamination, with sterile packaging for single-use.

 

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