Disposable Vacuum PT Blood Collection Tube

**I. Product Principle and Special Requirements**
This blood collection tube uses **3.2% (0.109 mol/L) or 3.8% sodium citrate** as the anticoagulant. By specifically chelating calcium ions in the blood, it reversibly inhibits the coagulation process, providing a stable basis for *in vitro* coagulation function analysis. Its core special requirements include:

- **Strict Blood-to-Anticoagulant Ratio:** It is essential to ensure a **9:1 ratio of blood to anticoagulant**. Insufficient or excessive blood collection volume will directly affect calcium ion concentration, leading to falsely prolonged or shortened coagulation times and significantly compromising result accuracy.
- **Timely Specimen Processing:** Testing should be completed within the specified time after collection to ensure the stability of coagulation factors.

**II. Main Areas of Application**
This tube is specifically designed for coagulation function-related tests requiring **plasma**, including:
- **Coagulation Screening Tests:** Prothrombin Time (PT), International Normalized Ratio (INR), Activated Partial Thromboplastin Time (APTT)
- **Coagulation Factor Activity Assays** (e.g., Factors II, V, VII, VIII, IX, X, XI, XII)
- **Anticoagulant Therapy Monitoring** (e.g., Warfarin, Heparin)
- **Coagulation Factor Inhibitor Screening**
- **Some Methodologies for Fibrinolytic System Testing** (e.g., D-dimer, Fibrinogen Degradation Products)

**III. Product Specifications and Key Operational Points**
- **Anticoagulant Type:** **3.2% (recommended) or 3.8% Sodium Citrate**
- **Identification Feature:** Typically identified by a **light blue cap** as the international standard.
- **Key Operational Procedures:**
1. **Venipuncture and Blood Collection:** Ensure smooth blood flow and avoid tissue fluid contamination. Fill the tube to the marked graduation line to ensure the **9:1 ratio**.
2. **Immediate and Thorough Mixing:** After collection, gently invert the tube **3–4 times** immediately to ensure complete mixing of the anticoagulant with the blood, preventing local clotting or activation.
3. **Specimen Processing:**
- Testing or plasma separation by centrifugation should be completed **within 1–4 hours** (according to the laboratory's Standard Operating Procedures).
- Centrifugation Conditions: Typically centrifuge at **1500–2500 RCF for 10–15 minutes** to obtain platelet-poor plasma (platelet count < 10 x 10⁹/L).
4. **Storage and Transport:** If testing is performed within 4 hours of separation, plasma can be stored at room temperature; otherwise, it should be stored at **2–8°C**, but not exceeding 24 hours. For long-term storage, plasma should be frozen at -20°C or -80°C, avoiding repeated freeze-thaw cycles.

FAQ

 

 

01.How can we guarantee quality?

Always a pre-production sample before mass production;
Always final Inspection before shipment; vacuum blood collection tube
27 years professional produce experience

02.What can you buy from us?

Our main products are Vacuum Blood Collection Tube System, Venous Blood Collection Needles System, Infusion Set, Disposable Lancet, Specimen Collection Swabs, Virus Specimen Collection Tube , Antigen Rapid Test Kit, with high quality, pretty competitive price and fast delivery.

03.Do you have any certificates?

YES, we have all the certificates required for export and local import custom clearance.

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