Platelet transfusion is a medical procedure in which platelets are collected from a donor and transfused into a patient. Platelets are small cell fragments in the blood that play a key role in blood clotting and wound healing. Platelet transfusions are commonly used to prevent or treat bleeding in patients with low platelet counts, such as those with cancer, undergoing chemotherapy, or after surgery. The procedure can help improve clotting ability and reduce the risk of excessive bleeding in these patients. Platelet transfusions are typically administered through intravenous infusion and are carefully matched to the patient's blood type to minimize the risk of adverse reactions.