PT Tube & Foundation For International Normalized Ratio Optimal For Automated Analyzers

Prothrombin Time Blood Collection Tube

Product Positioning
Specialized vacuum tube for coagulation testing (light blue stopper), serving as the gold-standard tool for thrombotic and hemostatic screening.

Core Mechanism

1. 3.2% Sodium Citrate

   • Precise chelation of calcium ions (Ca²⁺), inhibiting coagulation cascade

   • *Critical ratio control: Anticoagulant:Blood=1:9*

   • *＞10% deviation causes falsely prolonged PT/APTT*

Key Features

• *Silicone-coated interior minimizes platelet activation (ISO 6710 compliant)*

• *Vacuum accuracy ≤3% deviation (CLSI H21-A5 certified)*

• Pre-filled lyophilized anticoagulant for instant mixing

Core Applications

Critical Warnings

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• Underfilling (90% volume): PT prolongation ≥20% (may cause false heparin resistance)

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• *Gently invert 5-8 times immediately (vigorous shaking activates platelets)*

Technical Advantages

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  • Foundation for International Normalized Ratio (INR)

  • Enables cross-lab PT comparability (WHO-certified system)

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  • Optimal for automated analyzers

  • *Fibrin-free plasma after high-speed centrifugation (15000×g, 5min)*