Shanghai Orsin Medical Technology Co., Ltd.
Focus on life and pursue excellence
Add to Cart
Orsin Medical Technology's ESR tube is a vacuum blood collection system specifically designed for the Erythrocyte Sedimentation Rate (ESR) test. It features a pre-filled, precise amount of liquid sodium citrate anticoagulant to ensure a correct 4:1 blood-to-anticoagulant ratio, which is critical for accurate and reliable test results.
Engineered for safety and efficiency, the tube includes a safety-engineered stopper and is made from clear, break-resistant glass or PET plastic for optimal sample visibility. It is ideal for clinical laboratories seeking consistent performance in hematology testing.
ESR tubes incorporate advanced engineering to deliver superior clinical performance:
| Feature Category | Technical Specification | Clinical Value |
|---|---|---|
| Contamination Prevention | Closed vacuum system; direct blood transfer to anticoagulant tube | Eliminates operator exposure; reduces lab contamination; complies with biosafety standards |
| Operational Efficiency | Distinctive black cap; pre-measured anticoagulant; ready-to-use | Streamlines workflow; reduces sampling errors |
| Result Precision | 0.129mol/ L(anticoagulant:blood=1:4); concentration-controlled | Ensures consistent anticoagulation; prevents ESR deviations |
| System Compatibility | Compatible with major automated ESR analyzers (e.g., ESR-30/40); LIS/HIS integration | Enhances lab efficiency; reduces transcription errors |
| Interference Resistance | Specialized anticoagulant minimizes effects of icteric/hemolyzed/lipemic samples | Expands detectable sample range; improves reliability in pathological states |
1. Correct Order of Draw
Precaution: If multiple tubes are being collected, the non-additive tube (e.g., serum tube) should be drawn first. The citrate tube (ESR tube) should be the second in the order of draw.
Ensures Reliability: Prevents cross-contamination from other anticoagulants (like EDTA or Heparin), which can significantly alter the test results and lead to erroneous ESR values.
2. Proper Fill Volume is Critical
Precaution: Allow the tube to fill completely until the vacuum is exhausted. The blood volume must reach the fill mark on the tube to achieve the exact 4:1 blood-to-anticoagulant ratio.
Ensures Reliability: An underfilled tube has an excess of anticoagulant, which can cause hemodilution and artificially slow the sedimentation rate, producing inaccurate and unreliable results.
3. Immediate and Thorough Mixing
Precaution: Gently invert the tube immediately after collection a minimum of 8-10 times.
Ensures Reliability: Ensures complete mixing of the blood with the sodium citrate anticoagulant. Inadequate mixing can lead to clot formation, which renders the sample unusable and requires a recollection.
4. Adherence to Testing Timeframe
Precaution: The sample should be tested within 4 hours of collection if stored at room temperature. If a delay is unavoidable, the sample may be refrigerated (2-8°C or 36-46°F) for up to 12 hours, but it must be brought back to room temperature and mixed thoroughly before testing.
Ensures Reliability: prolonged storage at room temperature can alter the morphology and sedimentation characteristics of red blood cells, compromising the integrity of the result.
5. Use of Dedicated Equipment
Precaution: Use only Westergren pipettes or automated ESR analyzers that are specifically designed and validated for use with 4:1 ratio sodium citrate tubes.
Ensures Reliability: Using incorrect or non-validated equipment (e.g., pipettes for different tube sizes or ratios) will produce invalid and non-standardized results.
6. Visual Inspection Before Use
Precaution: Inspect the tube for damage, cracks, or expired shelf life before use. Do not use tubes if the anticoagulant appears discolored, evaporated, or crystallized.
Ensures Reliability: Guarantees the integrity of the vacuum and the effectiveness of the pre-filled anticoagulant, which are fundamental to obtaining a correct sample.
7. Safety Handling
Precaution: Treat all samples as potentially infectious. Use standard precautions. After use, dispose of the tube and sharp in an approved sharps container.
Ensures Reliability: Protects the healthcare worker from exposure to bloodborne pathogens, ensuring a safe working environment. A safe procedure is a reliable and controlled procedure.
| Category | Specification | Details |
|---|---|---|
| Intended Use | For the in-vitro collection of venous blood and measurement of Erythrocyte Sedimentation Rate (ESR) by the Westergren method. | |
| Anticoagulant | Type | Tri-Sodium Citrate (3.2% or 3.8%) |
| Concentration | 0.109 mol/L or 0.129 mol/L | |
| Ratio | 4:1 (Blood to Anticoagulant) | |
| Volume | 0.4 mL anticoagulant for 1.6 mL blood draw | |
| Tube Design | Material | Borosilicate Glass or PET Plastic |
| Dimensions | 13 x 100 mm (Standard Westergren) or 13 x 75 mm | |
| Total Volume | 2.0 mL or 2.5 mL | |
| Graduation | Precision scale from 0 to 200 mm | |
| Closure | Safety-engineered, latex-free stopper | |
| Performance | Sterility | Sterilized by Gamma Irradiation or ETO |
| Endotoxins | < 20 EU/tube | |
| Vacuum Accuracy | ±10% of nominal draw volume | |
| Shelf Life | 24 months from date of manufacture | |
| Storage & Handling | Temperature | Room Temperature (15-30°C / 59-86°F) |
| Handling | Protect from direct sunlight. Do not freeze. | |
| Stability after draw | Test within 4-6 hours (RT) or 12-24 hours (refrigerated) | |
| Compliance | Standards | CE Marked. Complies with relevant EU IVD Directive. |
Key Features:
Precise 4:1 blood-to-anticoagulant ratio
Pre-filled liquid sodium citrate
Safety-engineered design
Clear material for easy sample inspection
Consistent and reliable ESR results