Shanghai Orsin Medical Technology Co., Ltd.
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Orsin Medical Technology offers high-quality ESR (Erythrocyte Sedimentation Rate) blood collection tubes, designed to ensure accuracy and reliability in hematology testing. Our tubes contain a precise formulation of anticoagulants, such as sodium citrate, to maintain sample integrity and deliver consistent results for clinical diagnostics.
Engineered for convenience and safety, Orsin's ESR tubes feature user-friendly design, clear labeling, and compliance with international standards. Ideal for healthcare facilities and laboratories, they support efficient workflow and reduce preanalytical errors.
| 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. |
Usage Precautions: Standardized Operations Ensure Reliability
Tube Selection: Verify black-capped ESR-specific tubes contain 3.8% sodium citrate. Inspect for particulates, sedimentation, or cap looseness.
Storage Conditions: Store at 4-25°C. Avoid freezing (causes tube fracture) or high temperatures (degrades anticoagulant).
Patient Preparation: Collect blood from calm, preferably fasting patients. Note non-fasting status on requisition forms.
Order of Draw: Follow international sequence: blood culture → coagulation tubes → other anticoagulant tubes → ESR tubes (black cap). Prevents anticoagulant cross-contamination.
Exact Fill Volume: Draw precisely to fill line (typically 2mL). Underfilling causes false-low ESR; overfilling promotes microclot formation.
Mixing Technique: Gently invert 5-10 times immediately after collection. Avoid vigorous shaking to prevent partial anticoagulation or hemolysis.
Testing Timeline: Analyze within 2 hours. Delayed testing alters erythrocyte morphology. Store at 18-25°C if necessary (NEVER refrigerate).
Tube Orientation: Transport upright to avoid disturbing sedimentation.
Sample Rejection Criteria: Reject clotted, severely hemolyzed, improperly filled (>±10%), unlabeled, or damaged specimens.
*Note: 30% of ESR errors originate from pre-analytical issues, primarily inaccurate fill volumes and improper mixing.*
Precision Formula: Pre-filled 3.2% sodium citrate (4:1 ratio) for accurate Westergren ESR results.
Safety Design: Latex-free stopper with safety-engineered closure to prevent needlestick injuries.
Clear Scale: High-contrast 0-200 mm graduation for easy reading.
Ready-to-Use: Pre-vacuumed with consistent fill volume, reducing pre-analytical errors.
Quality Material: Inert glass/PET plastic ensuring sample integrity and clarity.
CE Certified: Complies with international IVD standards and sterility requirements.