Patent ID: 11938256
Assignee: TERUMO KABUSHIKI KAISHA
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 19:
20. A blood component collection cassette for use with a blood component separation device having a first load detector, the blood component collection cassette comprising:
a cassette body having a sheet shape made of a soft material;
a plurality of fluid passages provided in the cassette body, the plurality of fluid passages including:
a first fluid passage formed in the soft material for sending whole blood collected from a donor to the blood component separation device; and
a second fluid passage formed in the soft material for returning a predetermined blood component to the donor, wherein the first fluid passage and the second fluid passage are separate from one another over a first section of the cassette body, wherein the first fluid passage and the second fluid passage overlap with one another in a first overlap section and a second overlap section of the cassette body, and wherein the first section of the cassette body includes a first part of the first fluid passage having a first pressure-receiving portion that is pressed by the first load detector to detect internal pressure of the blood component collection cassette in an attached state in which the blood component collection cassette is attached to the blood component separation device;

a first branch portion adjacent to a first edge of the cassette body and that splits the first overlap section into the first fluid passage and the second fluid passage;
a second branch portion adjacent to a second edge of the cassette body and that splits the second overlap section into the first fluid passage and the second fluid passage, wherein the first edge of the cassette body is opposite the second edge of the cassette body;
a third branch portion provided in the first fluid passage in the first section of the cassette body and that splits the first section of the cassette body into the first part of the first fluid passage and a second part of the first fluid passage;
a first port member disposed at the first edge of the cassette body and through which the whole blood from the donor enters the cassette body and the predetermined blood component exits the cassette body;
a second port member disposed at the second edge of the cassette body and through which the whole blood exits the cassette body and the predetermined blood component enters the cassette body; and
a filter disposed in the second fluid passage, wherein the first and second parts of the first fluid passage bypass the filter,
wherein the first part of the first fluid passage is connected between the first branch portion and the second branch portion, and
wherein the second part of the first fluid passage is connected to the third branch portion and terminates in the cassette body.