title: Cryopreservation of dog platelets with dimethyl sulfoxide: therapeutic effectiveness of cryopreserved platelets in the treatment of thrombocytopenic dogs, and the effect of platelet storage at -80 degrees C.
abstract: Dog platelets were frozen with 6% dimethyl sulfoxide at 2-3 degrees C per minute in a -80 degrees C mechanical freezer. The frozen platelets were stored at -80 degrees C for as long as 39 months. After storage at -80 degrees C for less than 1 year, platelet in vitro freeze-thaw-wash recovery values were 70%, and in vivo survival values 1 to 2 hr after transfusion were 40% those of fresh platelets. After 2 years or longer storage, in vitro freeze-thaw-wash recovery values were 60%, and in vivo survival values 1 to 2 hr after transfusion were 20% those of fresh platelets. These results indicate that significant deterioration of the dog platelets occurred between the first and second year of storage at -80 degrees C. Platelets that were stored frozen at -80 degrees C for less than 1 year and washed before transfusion into lethally irradiated thrombocytopenic dogs were hemostatically effective.
mesh_terms: D000818:Animals; D001792:Blood Platelets / Q000166:cytology*; D001793:Blood Preservation / Q000379:methods*; D001803:Blood Transfusion; D004121:Dimethyl Sulfoxide; D004285:Dogs; D005615:Freezing; D017713:Platelet Transfusion; D013921:Thrombocytopenia / Q000628:therapy*
chemical_list: D004121:Dimethyl Sulfoxide