초록 ▼

A fluid collection device for receiving a liquid, such as blood, and which is adapted to be centrifuged to separate it into its relatively light and heavy phases. The collection device has a phase partitioning device having a specific gravity intermediate those of the light and heavy phases of the b

A fluid collection device for receiving a liquid, such as blood, and which is adapted to be centrifuged to separate it into its relatively light and heavy phases. The collection device has a phase partitioning device having a specific gravity intermediate those of the light and heavy phases of the blood so that it automatically moves during centrifugation to substantially the interface of the phases to sealingly partition them from each other. The device has a resilient sealing member which is of conical or “umbrella”configuration, and another member of different specific gravity connected to the sealing member and having stabilizing members for maintaining the sealing member properly oriented in the container. The sealing member partially collapses during centrifugation to allow blood components to pass by the sealing member. As the phases become separated and the centrifugal forces decrease, the sealing member expands radially outwardly and sealingly engages the walls of the container providing a barrier between the light and heavy phases upon complete phase separation.

대표청구항 ▼

A fluid collection device for receiving a sample of liquid centrifugally separable into relatively light and heavy phases comprising a closed container, and centrifugally actuated phase partitioning means movable in said container and having a specific gravity intermediate the specific gravities of

A fluid collection device for receiving a sample of liquid centrifugally separable into relatively light and heavy phases comprising a closed container, and centrifugally actuated phase partitioning means movable in said container and having a specific gravity intermediate the specific gravities of the phases, said partitioning means including a first member of resilient elastomeric material having a normal generally conical configuration when in said container and a specific gravity greater than that of the light phase, and a second member connected to said first member and having a specific gravity less than that of said first member so that during centrifugation of the collection device the difference between the specific gravities of said members causes partial collapse of said first member to allow liquid to flow past said partitioning means, said partitioning means being movable during centrifugation of the collection device due to the specific gravity thereof such that said first member is movable substantially to the interface of the two phases to provide a liquid impervious partition therebetween after centrifugation. A blood collection device for receiving whole blood and adapted to be centrifuged to separate the lighter phase from the heavier cellular phase comprising a tube, means closing one end of said tube, a pierceable stopper closing the opposite end of said tube, said tubing having a negative pressure therein for drawing blood into the tube by means of a cannula piercing said stopper, and a phase partitioning device within said tube including a first member of conical configuration having a vertex at the longitudinal axis and a skirt having walls tapering radially outwardly from said vertex, said skirt, in its normal unstressed state, having walls inclined radially outwardly toward said one end, said first member being formed of a resilient elastomeric material, a second member of substantially rigid material connected to said first member at said vertex, and a ring surrounding said skirt to hold said skirt in a partially collapsed condition, said ring having a specific gravity greater than the average of the specific gravities of said first and second members and movable off of said skirt during centrifugation to allow said skirt to move radially outwardly toward engagement with the inner walls of said tube, said partitioning device having a specific gravity intermediate the specific gravities of the separated lighter and heavier phases of the blood, said first member having a specific gravity greater than that of said second member and being predeterminately oriented with said first member disposed between said stopper and said second member.