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    • 37. 发明授权
    • Blood collection assembly with unidirectional flow valve
    • 采血组件采用单向流量阀
    • US4349035A
    • 1982-09-14
    • US161466
    • 1980-06-19
    • Joseph J. ThomasVincent L. VaillancourtMarcus J. MilletWilliam F. Smith
    • Joseph J. ThomasVincent L. VaillancourtMarcus J. MilletWilliam F. Smith
    • A61B5/15A61M1/00
    • A61B5/154A61B5/15003A61B5/150221A61B5/150389A61B5/150473
    • A blood collection assembly for receiving a blood sample from a patient but for preventing the blood from flowing out once it has been received. This assembly includes an evacuated receptacle, such as a blood collecting tube, for the reception and retention of a sample of blood. An opening is included in the receptacle into which a penetrable stopper is sealably positioned to maintain the evacuated condition inside the receptacle. Located inside the evacuated receptacle is a unidirectional flow valve through which blood entering the receptacle must pass. When the stopper is penetrated by a sharp cannular instrument carrying blood the pressure on the side of the valve facing the stopper is greater than the pressure in the evacuated receptacle, thereby causing the valve to open so that blood flowing from the instrument flows through the valve and into the receptacle. If the pressure in the receptacle changes so that it is greater than the pressure on the other side of the valve, the valve is operable to close to thereby prevent blood from backflowing into the patient.
    • 一种用于从患者接收血液样本但用于防止一旦接收到血液而流出的血液采集组件。 该组件包括用于接收和保留血液样本的抽真空的容器,例如采血管。 在容器中包括开口,其中可穿透的塞子被密封地定位,以将抽空状态保持在容器内。 位于抽真空的容器内的是一个单向流量阀,血液进入容器必须经过。 当塞子被携带血液的尖锐的管状仪器穿透时,面向塞子的阀侧的压力大于抽真空的容器中的压力,从而导致阀打开,使得从仪器流出的血液流过阀门 并进入容器。 如果容器中的压力变化使得其大于阀的另一侧上的压力,则阀可操作以关闭,从而防止血液回流到患者体内。