There if provided a medical device (100) comprising a first blood bag (101) for collection of whole blood from a patient and a second blood bag (109) for separation of a platelet rich plasma (PRP) fraction, wherein:a whole blood inlet (102) is provided at a first end (1011) of the first blood bag (101) and a first blood bag outlet (103) is provided at a second end of the first blood bag (101)；a packed cells outlet (105) and a plasma outlet (106) are connected to the first blood bag outlet (103)；a first flexible plastic tube (107) connects the plasma outlet (106) to a plasma inlet (108) provided at a first end (1091) of the second blood bag (109)；a second blood bag outlet (111) is provided at a second end of the second blood bag (109).
