Prothrombin Time Tube

The blood collection tube shown is a PT (Prothrombin Time) tube, commonly used for blood coagulation tests. Its main characteristics are as follows:

Tube Type: Evacuated blood collection tube, specifically a PT (Prothrombin Time) tube.
Anticoagulant: It contains a buffered sodium citrate solution, usually at a concentration of 3.2% or 3.8% (0.109 mol/L or 0.129 mol/L).
Mechanism of Action: Sodium citrate acts as an anticoagulant by chelating calcium ions, thereby inhibiting the blood coagulation cascade.
Collection Volume: A volume of 2.7 ml, which corresponds to the filling capacity of the tube.
Blood to Anticoagulant Ratio: The standard recommended ratio of blood to anticoagulant is 9:1 for coagulation tests. Use: Primarily used for blood coagulation studies, including prothrombin time (PT) and activated partial thromboplastin time (APTT).
Cap Color: Blue cap is the standard color for tubes containing sodium citrate for coagulation tests.
Material: Available in glass or PET (Polyethylene Terephthalate).
Labeling Information: The label allows for the patient’s name (Name) and case number (Pat No), as well as batch information (Lot) and the expiration date (represented by the second date on the tube).
Certification: The “CE” mark indicates compliance with European health, safety, and environmental protection standards.