Safety-engineered, latex-free stopper 1.28 mL ESR Interference Resistance

Brand Name:Orsin
Certification:ISO 13485
Model Number:Gel Clot ActivatoR
Minimum Order Quantity:100/pcs
Delivery Time:1-4 weeks
Payment Terms:L/C,D/A,D/P,T/T,Western Union
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Location: Shanghai Shanghai China
Address: Building A, No.599 Wanhua Road, Zhelin Town, Fengxian Area, Shanghai, China
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Orsin Medical Technology ESR Blood Collection Tubes

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.

Product Highlights: Technological Innovation Ensures Accuracy

ESR tubes incorporate advanced engineering to deliver superior clinical performance:

Feature CategoryTechnical SpecificationClinical Value
Contamination PreventionClosed vacuum system; direct blood transfer to anticoagulant tubeEliminates operator exposure; reduces lab contamination; complies with biosafety standards
Operational EfficiencyDistinctive black cap; pre-measured anticoagulant; ready-to-useStreamlines workflow; reduces sampling errors
Result Precision0.129mol/ L(anticoagulant:blood=1:4); concentration-controlledEnsures consistent anticoagulation; prevents ESR deviations
System CompatibilityCompatible with major automated ESR analyzers (e.g., ESR-30/40); LIS/HIS integrationEnhances lab efficiency; reduces transcription errors
Interference ResistanceSpecialized anticoagulant minimizes effects of icteric/hemolyzed/lipemic samplesExpands detectable sample range; improves reliability in pathological states

To ensure the accuracy, safety, and reliability of test results, strictly adhere to the following standardized operating procedures:

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.

Technical Specifications: Standard-Compliant Parameters

CategorySpecificationDetails
Intended UseFor the in-vitro collection of venous blood and measurement of Erythrocyte Sedimentation Rate (ESR) by the Westergren method.
AnticoagulantTypeTri-Sodium Citrate (3.2% or 3.8%)
Concentration0.109 mol/L or 0.129 mol/L
Ratio4:1 (Blood to Anticoagulant)
Volume0.4 mL anticoagulant for 1.6 mL blood draw
Tube DesignMaterialBorosilicate Glass or PET Plastic
Dimensions13 x 100 mm (Standard Westergren) or 13 x 75 mm
Total Volume2.0 mL or 2.5 mL
GraduationPrecision scale from 0 to 200 mm
ClosureSafety-engineered, latex-free stopper
PerformanceSterilitySterilized by Gamma Irradiation or ETO
Endotoxins< 20 EU/tube
Vacuum Accuracy±10% of nominal draw volume
Shelf Life24 months from date of manufacture
Storage & HandlingTemperatureRoom Temperature (15-30°C / 59-86°F)
HandlingProtect from direct sunlight. Do not freeze.
Stability after drawTest within 4-6 hours (RT) or 12-24 hours (refrigerated)
ComplianceStandardsCE 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


China Safety-engineered, latex-free stopper  1.28 mL ESR Interference Resistance supplier

Safety-engineered, latex-free stopper 1.28 mL ESR Interference Resistance

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