Blood separation chamber with preformed blood flow passages and centralized connection to external tubing
First Claim
1. A blood separation chamber comprisinga formed body, which, in use, rotates about a rotational axis, a first interior wall formed on the body, which extends circumferentially about the rotational axis to define a hub, inside and outside walls formed on the body, which extend circumferentially about the hub in a spaced apart relationship to define between them a separation channel, second interior walls formed on the body, which extend radially from the hub in a spaced apart relationship to define between them at least one passage that communicates with the separation channel to direct blood between the hub and the separation channel, a third interior wall formed on the body, which extends partially into the separation chamber from the inside wall toward the outside wall to define a dam that forms a constricted passage along the outside wall, and a connector formed on the body to couple exterior tubing to the hub in communication with the passage to convey blood to or from the passage during rotation of the formed body.
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Accused Products
Abstract
A blood separation chamber comprises a base that includes formed walls that define a hub. A separation channel extends about the hub. A flow passage extends between the hub and the separation channel. The hub enables attachment of external tubing to convey blood to and from the separation channel through the hub.
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Citations
30 Claims
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1. A blood separation chamber comprising
a formed body, which, in use, rotates about a rotational axis, a first interior wall formed on the body, which extends circumferentially about the rotational axis to define a hub, inside and outside walls formed on the body, which extend circumferentially about the hub in a spaced apart relationship to define between them a separation channel, second interior walls formed on the body, which extend radially from the hub in a spaced apart relationship to define between them at least one passage that communicates with the separation channel to direct blood between the hub and the separation channel, a third interior wall formed on the body, which extends partially into the separation chamber from the inside wall toward the outside wall to define a dam that forms a constricted passage along the outside wall, and a connector formed on the body to couple exterior tubing to the hub in communication with the passage to convey blood to or from the passage during rotation of the formed body.
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21. A blood separation chamber for use in a blood centrifuge of the type that rotates an umbilicus in concert with a centrifuge rotor to prevent twisting of the umbilicus, the blood separation chamber comprising
a unitary base including formed walls that define a hub, formed inner and outer walls that define between them a separation channel that extends circumferentially about the hub, a formed interior wall that extends partially into the separation chamber from the inside wall toward the outside wall to define a dam that forms a constricted passage along the outside wall, and formed walls that define between them a flow passage that extends radially between the hub and the separation channel, the hub being further formed to enable attachment of the umbilicus to convey blood to and from the separation channel through the hub, and a lid covering the base and closing the separation channel on a side opposite to the hub, the lid being formed to enable releasable attachment of the blood processing chamber as a unit to the centrifuge rotor for rotation to separate blood in the separation channel.
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23. A blood separation chamber comprising
a formed body, which, in use, rotates about a rotational axis, a first interior wall formed on the body, which extends circumferentially about the rotational axis to define a hub, inside and outside walls formed on the body, which extend circumferentially about the hub in a spaced apart relationship to define between them a separation channel in which, during rotation of the formed body, blood separates into first and second blood components, second interior walls formed on the body, which extend radially from the hub in a spaced apart relationship to define between them an inlet passage to direct blood from the hub into the separation channel, a first outlet passage to direct the first blood component from the separation channel to the hub, and a second outlet passage to direct the second blood component from the separation channel to the hub, a connector formed on the body to couple exterior tubing to the hub in communication with the inlet and first and second outlet passages to convey blood to or from the inlet and first and second outlet passages during rotation of the formed body, and an interior wall formed on the body, which extends partially into the separation channel to define a dam in the separation channel.
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26. A blood separation chamber comprising
a formed body, which, in use, rotates about a rotational axis, a first interiorwall formed on the body, which extends circumferentially aboutthe rotational axis to define a hub, inside and outside walls formed on the body, which extend circumferentially about the hub in a spaced apart relationship to define between them inner and outer separation channels, second interior walls formed on the body, which extend radially from the hub in a spaced apart relationship to define between at least one passage that communicates with the inner separation channel and at least one passage that communicates with the outer separation channel to direct blood between the hub and the inner and outer separation channels, and a connector formed on the body to couple exterior tubing to the hub in communication with the passage to convey blood to or from the passages during rotation of the formed body.
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29. A blood separation chamber for use in a blood centrifuge of the type that rotates an umbilicus in concert with a centrifuge rotor to prevent twisting of the umbilicus, the blood separation chamber comprising
a unitary base including formed walls that define a hub, formed inner and outer walls which extend circumferentially about the hub in a spaced apart relationship to define between them inner and outer separation channels, and formed walls that extend radially from the hub in a spaced apart relationship to define between them at least one passage that communicates with the inner separation channel and at least one passage that communicates with the outer separation channel to direct blood between the hub and the inner and outer separation channels, and a lid covering the base and closing the separation channel on a side opposite to the hub, the lid being formed to enable releasable attachment of the blood processing chamber as a unit to the centrifuge rotor for rotation to separate blood in the separation channel.
Specification