JPS5916532A - Agitator for blood bag - Google Patents

Abstract

PURPOSE:To agitate automatically and effectively a blood bag by providing a roll and an agitation tray, and rocking up or down the content in the blood bag with the slope of the circular conical agitation tray according to the movement of the roll. CONSTITUTION:A driving shaft 2 of a motor 1 mounted to a base plate 8 and a spherical sliding bearing 14 are connected by means of a connection pipe 13, and the bearing 14 is mounted to the center of an agitation tray 7. The circular conical projecting part of the tray 7 is brought into contact with a blood bag 9 to be washed, and the circular conical recess on the shaft 2 side thereof is held in contact with a roll 4 which is provided freely turnably to the outside circumferential end of a roll holder 3 connected in one body to the shaft 2 by means of the shaft 3. The roll 4 is circularly moved by the rotation of the roll holder 3, and the thawed blood components and washing liquid in the bag 9 are mixed by the agitation effect thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic device for the process of stirring a blood bag after thawing frozen blood components and injecting a cleaning solution to remove the antifreeze agent.

In order to avoid troubles caused by blood type incompatibility, the best method is to save the patient's own blood and transfuse it into the patient's body. Component transfusions are seen as promising because they reduce the burden on patients, and serum hepatitis can be prevented by transfusing only red blood cells without plasma. In order to quickly respond to the demand for emergency cases9, blood components are collected in advance from healthy individuals, centrifuged, separated, and frozen with a drug added to prevent the destruction of blood components due to frost damage. It is being said. To use frozen blood components on a patient,
It is necessary to dissolve it in hot water slightly higher than body temperature7 and wash it to remove the antifreeze agent. First, the thawed blood components are mixed with a washing solution and the desired blood components are precipitated by centrifugation, and the antifreeze agent is suspended and removed with the washing solution. It's not a big deal.

In reality, it is necessary to repeat the steps of injection of washing liquid, stirring, centrifugation, and removal of supernatant several times. To enumerate several examples of prior art techniques and their shortcomings, the first one is said to be that stirring is sufficient even though it is a manual method. The disadvantage of this is that it goes against labor saving because it requires human intervention, and it is difficult for amateurs to process it.

The second method is to apply vibration from the outside using a mechanical method, but although the vibration and noise are large, the stirring effect is not good.

The third method is to coat a magnetic material with a substance that is harmless to blood, store it in a blood bag in advance, and use an external motor shaft to attract the magnetic material to loosen and stir the magnetic material. This drawback is that only blood banks that contain magnetic material can be used, and the cost increases due to the inclusion of magnetic material, which is generally disadvantageous for single-use blood bags.

SUMMARY OF THE INVENTION An object of the present invention is to provide a stirrer structure that eliminates the drawbacks of the prior art described above, automatically performs effective stirring, and facilitates the setting of a blood bag to be washed.

The present invention attempts to mechanically perform an action that approximates the human hand massage, which is considered to be the most effective method. In other words, a roller and a stirrer are used to replace the human fingers that massage the local area with the fingertips, and as the roller moves, the contents of the blood bag are shaken open on the inclined surface of the conical agitator, and the blood bag is allowed to fall under its own weight. Let them do it. You can also increase the stirring effect by rotating it clockwise or counterclockwise.

FIG. 1 shows the structure of the stirrer according to the present invention. The drive shaft 2 of the motor 1 attached to the substrate 8 and the spherical sliding bearing 14 are connected by a joint pipe 13, and the spherical sliding bearing 14 is attached to the center of the stirrer 7. Stirrer 7Fi washed blood bag 9
A conical convex portion is in contact with the drive shaft 2, and a roller 4 rotatably provided on the outer peripheral end of a roller holder roller that is integrated with the shaft 2 via a joint tube 1 is in the conical concave portion on the drive shaft 2 side. are in contact with each other.

As the roller 4 moves circularly due to the rotation of the roller holder, the thawed blood components in the blood bag 9 to be washed are moved to the position shown in FIG. 1 (A) or to the position shown in FIG. 1 (B). The agitation effect of the cleaning solution ensures sufficient mixing. That is, FIG. 1(a) shows a state in which the conical protrusion of the stirrer 7 presses against the lower half of the blood bag 9 to be washed, and if the drive shaft 2 is rotated clockwise or counterclockwise, the This shows that the upper half of the blood bag 9 to be washed is pressed as shown in FIG. 1 (b). In this way, the contents of the blood bag 9 can be sufficiently stirred by rotating the stirrer 7 in forward and reverse directions.

FIG. 2 shows an embodiment of the method for setting the blood bag 9 to be washed. Hook the blood bag 9 to be washed onto the pin 11 of the cover 10, which is rotatably provided on the pin 8 provided on the substrate 8, as shown by the two-dot chain line, close the cover 10, and attach the stopper 15, as shown by the solid line. By doing so, it is set.

According to the present invention, the thawed blood components and the washing liquid can be effectively stirred, and the blood bag to be washed can be set up very easily.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing the stirrer of the blood bag of the present invention, and FIG. 2 is a front view thereof. 1 is a motor, 2 is a drive shaft, 6 is a roller boulder, 4 is a roller, 5 is a bearing, 6 is a shaft, 7 is a stirrer, 8 is a substrate, 9 is a blood bag, 1o is a cover, 11 is a pin, 12 is a pin ,1
3 is a joint pipe, 14 is a spherical sliding bearing, and 15 is a stopper plate 3
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Claims (1)

[Claims] A stirring plate having a conical slope is provided at the tip of the rotary drive shaft via a bearing that can slide along a spherical surface, and a wall surface for attaching the blood bag is arranged at a position where the blood bag is crushed by the conical slope of the stirring plate. A blood bag stirrer having one rotatable roller on a support that rotates integrally with a drive shaft on the back of the stirring plate.