Blood collection valve

摘要: A means to prevent backflow during vena-puncture by employing a one way valve in conjunction with an evacuated tubular element which has at its opened end resilient stopper is used house or contain said and acts as sealant for the system. The allows penetration special two-ended cannula threaded into holder hold vena puncture. Blood flows from vein, through cannula, hollow portion of containing subsequently storage. During blood collection, prevented backflowing closing action valve. In this manner contamination patient particulate matter within prevented.