Single donor platelets (SDP)

March, 2016
The department of transfusion medicine has passed one more milestone on its path of progress: single donor platelets (SDP).

KCHRC blood bank has acquired the license to manufacture single donor platelet (SDPs) by apheresis procedure on the Trima Accel automated blood collection system (supplied by Terumopenpol).
This techniques makes it possible to obtain ONLY platelets from a donor by a process called ‘Apheresis’. The process is just like a normal blood donation: blood is drawn from the donor, which is sent to a special blood bag inside the apheresis machine. Then the machine starts to spin, separates the platelets and sends the remaining blood components back to the donor’s body. This cycle is repeated 6 – 8 times.  In 60-90 minutes it collects almost 300 ml. of platelets.

Single Donor Platelets (SDP), are used to correct thrombocytopenia just as random donor platelets are (RDP). They are not available off the shelf in a blood bank because of their short life span, but offer many advantages:
  • Single Donor Platelets are more potent than Random Donor Platelets. 
  • 1 unit of Single Donor Platelets is equivalent to 6-8 units of Random Donor Platelets (Platelet Concentrates), thus minimizing patient’s exposure to TTI.
  • Single Donor Platelets, being collected by a more efficient system of component separation, have a lesser chance of carrying other components like RBCs. They are therefore available to be transfused to a patient with minimal other cellular contamination.
  • Considering that the life of platelets is only 5 days, Single Donor Platelets ensure that there is no waste, as they are collected for a specific purpose.
  • In Blood Donation, the donor donates 350/450 ml. of blood including RBCs, whereas in Platelet Donation the donor donates approx. 300 ml. of only platelets.
  • Apheresis Donor does not have any restrictions with respect to lifting heavy weights and rigorous physical exercises on the day of donation.
  • Apheresis Donor can donate blood after 3 days in the event of an emergency.