vacuum blood collection tubes with purple caps to preserve blood cell s in an unchanged state, packaged in protective film

vacuum blood collection purple caps preserve cell elements unchanged state packaged protective film preservation laboratory equipment packaging sample storage anticoagulant medical supplies clinical edta sterile hematology testing analysis use sampling purpletop security healthcare tube diagnostic tools system protection phlebotomy laboratorygrade specimen vitro bloodwork lab vacuumsealed containers medicalgrade integrity stability tubes film