JPH0634636U - Blood bag with membrane filter - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to an improvement of a blood bag used for separating blood collected through a filter. A connecting pipe 2a and a branch pipe 3b are arranged downstream of the blood collecting bag 10, a blood collecting needle 9 is connected to the branch pipe 3b through a connecting pipe 2d, and a connecting pipe 1a (downstream of the branch pipe 3b). 1b) is attached to the filter-12 (12a), and a branch pipe 3a is connected to the downstream side of the filter-12 (12a) and blood component separation bags 4 and 5 connected to the branch pipe 3a via connecting pipes 2a and 2b. And a membrane filter-attached blood bag 1 (1A) in which a membrane filter 6 is connected to the branch pipe 3a through a connecting pipe 2a (hereinafter referred to as "blood bag 1 (1A)"). [Effects] The blood bag 1 (1A) can easily transfer air, which hinders the work in the blood component separation bag 4, to the membrane filter 6, and
After the seal 6 is cut from the branch pipe 3a, the centrifugal separation process can be performed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a blood bag used when separating blood collected through a filter.

[0002]

[Problems to be solved by conventional techniques and devices]

 FIG. 3 is a schematic view of a blood bag 21 currently in use, in which a connecting pipe 22a and a branch pipe 23b are arranged in the lower stream of the blood collecting bag 30, and a blood collecting needle 29 is connected to the branch pipe 23b via a connecting pipe 22d. A filter-32 (32a) that is connected and has a connecting pipe 21a (21b) attached is disposed downstream of the branch pipe 23b, and is connected downstream of the filter-32 (32a) via a connecting pipe 32a. Blood component separation bags 24, 25 are arranged. The collected blood is separated into each blood component by the filter-32, but the air inside the filter-32 was accumulated in the blood-component separation bag 24, and these extra air could not be removed. .

Further, when the blood bag 21 is subjected to high-pressure steam sterilization treatment, the filter-32 temporarily thermally expands, and when it returns to its original shape at room temperature, the inside becomes negative pressure, so that the connecting pipe 22a, the blood transfusion port 27 and the connecting pipe 28 were sometimes sucked inward and crushed. For this reason, the blood component cannot be transferred, and thus it may not be used for separating blood. Therefore, the present inventor has made extensive studies in order to solve the above problems, and has arrived at the next inventor.

[0004]

[Means for Solving the Problems]

 FIG. 1 is a schematic view of a blood bag 1 of the present invention. The blood bag 1 includes a blood collecting needle 9, a blood collecting bag 10, a filter 12, a blood component separating bag 4, a blood component separating bag 5, and connecting pipes 2a (2b, 2c, 2d) connecting these. ,) And the branch pipe 3a (3b).

A connecting pipe 2a and a branch pipe 3b are arranged downstream of the blood collecting bag 10, a blood collecting needle 9 is connected to the branch pipe 3b via a connecting pipe 2d, and a connecting pipe 1 is provided downstream of the branch pipe 3b. A filter-12 [nonwoven fabric filter (fiber having a diameter of 1.0 to 50 μm, weight of 2 to 5 g)] equipped with a (1b) is arranged. Reference numeral 11 is a communication piece.

A branch pipe 3a, a blood component separating bag 4 and a blood component separating bag 5 connected to the branch pipe 3a via connecting pipes 2a and 2b are arranged downstream of the filter 12, and the branch pipe 3a is provided. A membrane filter-6 is connected to the via a connecting pipe 2c. A blood transfusion port 7 and a connecting pipe 8 are formed at the upper end of the blood fluid component separating bag 4 (blood component separating bag 5). Further, the membrane filter 6 is capable of high-pressure steam sterilization and is made of a hydrophobic material that allows gas to pass but does not allow liquid to pass, and has an excellent property of permeating sterile air.

Next, a method of using the blood bag of the present invention will be described. Blood is accommodated in a blood collection bag 10 from a blood collection needle 9 through a connecting pipe 2d, and the blood collection bag 10 is hung on a hanger and passed through a filter 12 by a drop. White blood cells and platelets are captured by the filter-12, and plasma components and red blood cell components are stored in the blood component separation bag 4 through the connecting pipe 2a and the branch pipe 3a.

The air in the filter 12 is temporarily introduced into the blood component separating bag 4, but external pressure is applied to the blood component separating bag 4 to connect the air to the connecting pipe 2a and the branch pipe 3a. , Through the connecting pipe 2c and through the membrane filter 6 to the outside. Subsequently, the connecting pipe 2c is clamped, sealed and cut. The blood component separating bag 4 from which excess air has been removed is subjected to a centrifugal separation process to separate the red blood cell component and the plasma component, and the supernatant plasma component is stored in the blood component separating bag 5 via the connecting pipe 2b.

FIG. 2 shows another embodiment of the present invention. Instead of the filter 12 of the blood bag 1 of FIG. 1, a filter 12a (hollow fiber type filter (inner diameter 100 to 150 μm, film thickness 30 to 150 μm)) The blood bag 1A is a filter 12a that filters the plasma component and stores the red blood cell component in the blood component separating bag 4. Other components and usage are as follows. Since it is substantially the same as the blood bag 1 of FIG. 1, it is omitted.

[0010]

[Function and effect of the device]

 As described above, in the present invention, the blood bag 1 (1A) can easily transfer the air, which hinders the work in the blood component separation bag 4, to the membrane filter 6 and the membrane filter 6 After the seal is cut from the branch pipe 3a, the centrifugal separation treatment can be performed.

The blood bag 1 (1A) has a vapor (air) which is filtered from the membrane filter 6 (which is made of a sheet material having a good vapor permeability) even when subjected to high-pressure steam sterilization. Since the filter 12 (12a) is absorbed into the inside of the filter 12 (12a), the inside of the filter 12 (12a) does not become negative pressure even when the temperature returns to room temperature, and the connecting pipe, the blood transfusion port, and the connecting pipe do not collapse.

[Brief description of drawings]

FIG. 1 is a schematic view of a blood bag of the present invention.

FIG. 2 is a schematic view of a blood bag according to another embodiment of the present invention.

FIG. 3 is a partially enlarged view of a conventional blood bag.

[Explanation of sign]

 1 Blood Bag 1a Connection Pipe 1b Connection Pipe 2a Connection Pipe 2b Connection Pipe 2c Connection Pipe 2d Connection Pipe 3a Branch Pipe 3b Branch Pipe 4 Blood Component Separation Bag 5 Blood Component Separation Bag 6 Membrane Filter-7 Blood Inlet 8 Connection Pipe 9 Blood collection needle 10 Blood collection bag 12 Filter-12a filter-

Claims (1)

[Scope of utility model registration request] 1. A connecting pipe 2a and a branch pipe 3b are arranged downstream of a blood collecting bag 10, a blood collecting needle 9 is connected to the branch pipe 3b via a connecting pipe 2d, and a connecting pipe is provided downstream of the branch pipe 3b. Filter-12 (12a) equipped with 1a (1b)
Is arranged, and a branch pipe 3a and blood component separation bags 4 and 5 connected to the branch pipe 3a via connecting pipes 2a and 2b are arranged downstream of the filter-12 (12a).
A blood bag 1 (1A) with a membrane filter (a blood bag 1 (1A)) having a membrane filter 6 connected to a via a connecting pipe 2a.