Administration Rate of Platelet Concentrates
Platelet concentrate should not be administered as a fast drip but rather should be infused over a period of 30 minutes through a standard blood administration set or platelet administration set incorporating a 170- to 200-μm filter. 1
Proper Administration Guidelines
- Platelet concentrate should be stored at 22°C with constant gentle agitation in an approved incubator until ready for use 1
- Transfusion should ideally be commenced within 30 minutes of removal from the platelet storage incubator 1
- A standard adult therapeutic dose should be administered through a dedicated administration set with an appropriate filter 1
- Do not give platelets through a set that has already been used for red cells 1
- No drugs should be added directly to the unit of platelets 1
Rationale for Controlled Infusion Rate
- Rapid infusion may increase the risk of adverse reactions, including transfusion-related acute lung injury (TRALI) and circulatory overload 1
- Platelets are more fragile than other blood components and may be damaged by excessive pressure during rapid administration 2
- Controlled infusion allows for better monitoring of potential transfusion reactions 1
- The standard 30-minute infusion time has been established as the optimal balance between timely administration and preservation of platelet function 1
Clinical Considerations for Platelet Transfusion
Indications
- Prevention and treatment of bleeding due to thrombocytopenia or platelet function defects 1
- For actively bleeding patients, transfuse to maintain a platelet count > 75 × 10^9/L 1
- For patients with traumatic brain injury or severe bleeding, a higher threshold of 100 × 10^9/L is recommended 1, 3
- For non-bleeding patients with chemotherapy-induced thrombocytopenia, transfuse only if platelet count < 10 × 10^9/L 1
Dosing
- Each standard adult therapeutic dose contains 250-350 ml with a platelet count > 2.4 × 10^10/L 1
- A standard dose should increase the patient's platelet count by approximately 30 × 10^9/L 1
- For severe bleeding, an initial dose of 4-8 platelet concentrates or one apheresis pack is recommended 1
Potential Complications and Precautions
- Risk of bacterial infection transmission (1 in 12,000) is higher than with other blood components due to storage at 22°C 1
- Bacterial screening before release helps reduce this risk 1
- Platelets must never be placed in a refrigerator as this damages platelet function 1
- The patient's platelet count should be repeated after transfusion to assess response 1
- Monitor for potential adverse reactions including fever, urticaria, anaphylaxis, and TRALI 4
Special Considerations
- D-negative children and women of childbearing potential should receive D-negative platelets to prevent risk of developing immune anti-D 1
- Group O platelets given to non-group O children should be selected to be high-titre negative 1
- In trauma settings with massive bleeding, platelet transfusion may need to be incorporated into a broader hemostatic resuscitation strategy 1