JPH0376946B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a tube communication device attached to a container such as a blood bag. The present invention relates to a tube communication device that can communicate the inside of a tube by separating a communication body provided in the tube.

[Prior Art and its Problems] So-called multiple blood bags, in which a plurality of bags are connected by tubes, are used for blood component transfusion and the preparation of blood products. For example, blood is collected in a first bag, centrifuged, and the supernatant plasma is transferred to a second bag via a tube. This second bag is separated and used separately to obtain a plasma product. A third bag contains a blood preservation solution, and after separating the second bag, the blood preservation solution is transferred via a tube to a first bag containing blood components. do.

In such an operation, for example, in the centrifugation operation of the first bag, the tube connecting the two bags is closed to prevent blood components from transferring to the second bag, and the supernatant plasma is transferred to the second bag. It is necessary to achieve communication between the two during transfer to the bag. As a communication device for such a tube,
Conventionally, for example, a communicating body fixed to the inner wall of a tube as shown in FIG. and a closed part having an outer diameter smaller than the inner diameter of the tube.

As shown in FIG. 8, the closing portion has a proximal end portion having approximately the same diameter and a tapered tip portion having the same inclined surface facing each other, and the thickness becomes thinner toward the distal end portion. . When communicating the tubes, the blocked portion is separated at the thin wall portion to achieve communication between the tubes.

However, as shown in FIG. 8, the communicating body in the conventional tube communicating device has a so-called edge portion whose outer surface is formed by a straight line at the distal end of the communicating body. For this reason, the distal end of the closed portion came into strong contact with the tube due to gravity during centrifugation, sometimes causing the tube to break.

[Means for Solving the Problems] An object of the present invention is to provide a tube communication device that can prevent the tube from breaking due to contact between the tip of the closed portion of the communication body and the inner wall of the tube during centrifugation. This is what we provide.

What achieves the above object is a tube communication device comprising a tube and a communication body provided in the tube, the communication body having an outer surface that contacts the inner surface of the tube over the entire circumferential direction. a hollow body portion fixed to the hollow body portion; an elongated closing portion having an outer surface continuous with the outer surface of the hollow body portion and extending axially outward from one end of the hollow body portion; The closed part is separated by a force applied from the outside of the tube, and has an annular thin wall part that communicates the inside of the hollow part with the inside of the tube, and further, the outer surface of the distal end of the closed part is curved. It is a tube communication device formed by.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The tube communication device of the present invention will be described below using embodiments shown in the drawings.

The tube communication device of the present invention has a tube 20
and a communicating body 10, the communicating body 10 has a fixed hollow body part 11 having an outer surface that contacts the inner surface of the tube 20 over the entire circumferential direction, and a hollow body part 11.
An elongated closing portion 12 having an outer surface continuous with the outer surface of the hollow body portion 11 and extending axially outward from one end of the hollow body portion 11.
and an annular thin wall portion 15 that separates the closing portion 12 by a force applied from the outside of the tube 20 near the hollow body portion 11 and communicates the inside of the hollow body portion 11 and the inside of the tube 20, Furthermore, the outer surface of the distal end of the closing portion 12 is formed by a curved surface.

Therefore, explanation will be given using the tube communication device of the embodiment shown in FIGS. 1 to 3.

FIG. 1 is a partially sectional side view of a communication body used in an embodiment of the tube communication device of the present invention;
FIG. 2 is a plan view of the vicinity of the closed portion of the communication body shown in FIG. 1, and FIG. 3 is a diagram showing the tube communication device with the communication body attached to the tube.

The tube communication device of the present invention is composed of a tube 20 and a communication body 10.

As shown in FIG. 3, the tube 20 is a tube body having an inner diameter into which the hollow body portion 11 of the communication body can be attached, and is made of a flexible material.

The communication body 10 has a hollow body portion 11 made of a cylindrical body.
and a closing portion 12 made of an elongated body. A thin wall portion 15 is formed between the hollow body portion 11 and the closing portion 12 over the entire circumference. By cutting the communication body 10 by the thin wall portion 15, the tube communication device becomes in a communication state. There are no particular restrictions on the means for communicating the inside of the tube, as long as the closed part can be separated, and means other than via a thin wall part, such as insertion,
It may also be a means that can be separated after screwing or the like.

The hollow body portion 11 has an outer diameter slightly larger than the inner diameter of the tube 20 in which the tube communication device is installed.

The closing portion 12 is constituted by an elongated body whose width is smaller than the inner diameter of the tube 20, and therefore does not come into contact with the tube under normal conditions.
The outer surface of the distal end of the closing portion 12 is formed into a curved surface, as shown in FIGS. 1 and 2. In particular, as shown in FIG.
The tip of the closing portion 12 has a rounded curved surface, and as shown in FIG. 2, the right and left corners of the tip of the closing portion 12 are also formed of rounded curved surfaces.
The tube 20 to which the communication body 10 is attached is a flexible tube, so when the tube 20 is curved, the inner surface of the communication body 1
contact with the tip of the closing part 12 of No. 0. As mentioned above, the tip of the communicating body 10 is formed of a rounded curved surface that may come into contact with the inner surface of the tube, and has no so-called edges, so it does not touch the inner surface of the tube 20 during centrifugation. This prevents the tube from being damaged even if it comes into contact with it.

Further, as shown in FIG. 2, the surface of the closing portion 12 is preferably a matte surface so that the tube does not stick even if it comes into contact with it.

Furthermore, the elongated body constituting the closure part 12 is
The center 12b of the tip and the center 12a of this thin part 15
It is preferable that there is a curvature between the straight line connecting these and the center line, which is a locus of points equidistant from the two opposing surfaces of the outer surface of the closure part. Further, the center line may be a straight line or a curved line. In the embodiment shown in FIG. 1, one of the opposing surfaces 13 is a curved surface, and the other surface 14 is a flat inclined surface. And, this closing part 12 is
It has a width smaller than the inner diameter of the tube 20.

Then, the communication body 1 shown in FIGS. 1 and 2
As shown in FIG. 3, the hollow body part 11 is fixed to the inner wall of the tube and installed in the tube 20 in which communication is to be achieved. The hollow body portion 11 is a cylindrical body, and its length is not limited, but it may have a length that can be stably fixed within the tube in practical terms.

In the tube communication device of the present invention, as shown in FIG.
Then, the tube 22 connected to the second and third bags is inserted and fixed.

FIG. 4 shows a perspective view of a communication body used in a tube communication device according to another embodiment of the present invention.
The communication body of this embodiment is the same as that shown in FIGS. 1 and 2, except that the opposing surfaces 13' and 14' of the closure portion both define curved surfaces.

The tube communication device of the present invention is used by being incorporated into a multiple blood bag device as shown in FIG. 5, for example. This multiple blood bag device includes a first bag 30, a second bag 31, and a third bag 32 for blood collection. A blood sampling needle 34 is connected to the first bag 30 via a tube 33. The first bag 30 and the third bag 32 are connected by a flexible tube 22, and the second
A tube 35 branched from the tube 22 is connected to the bag 32 . The tube 22 is the first
A short tube 21 connected directly to the bag 30 of
As shown in FIG. 3, they are connected via a tube 20 of a tube communication device. In operation, blood is collected into a first blood bag using the blood collection needle 34, and after centrifugation, the closed part 12 of the communication body 10 of the communication device of the present invention is cut, and the tube 21 is removed.
and tube 22, and the supernatant plasma is transferred to the second bag 31 via tube 22 and tube 35. This second bag is separated and used to obtain the plasma product. A third blood bag 32 contains a blood preservation solution,
After separating the second bag 31, the blood preservation solution is transferred via the tube 22 to the first bag 30, where the plasma component is removed and the blood cell component remains.

[Function] The function of the tube communication device of the present invention will be explained with reference to FIGS. 5 and 3.

First, using the blood bag device shown in FIG. 5, blood is collected into a first bag 30 and centrifuged. When the tube 20 which is initially blocked is made to communicate with the tube communication device of the present invention, the tube 20 shown in FIG.
5, the closing portion 12 is separated from the hollow body portion 11. This separation achieves the opening of the hollow body 11, through which the tubes 21 and 22 communicate and the liquid can flow freely. Since the distal end of the communicating body 10 is formed with a rounded curved surface at a portion that may come into contact with the inner surface of the tube, it is possible to prevent damage to the tube during the breaking operation of the communicating body.

Further, as shown in FIGS. 1 and 2, the closed portion of the communication body is connected to a straight line connecting the center of the tip of the closed portion and the center of the thin wall portion, and from two opposing surfaces of the outer surface of the closed portion. If there is a warp between the center line, which is the locus of points equidistant from each other, after separating the blocking part 12, move it in the direction shown by the arrow in FIG. 2nd from Batug 30
(Go to Bag 31) When plasma flows, the flow path lengths on the opposing upper and lower surfaces of the blocking part 12 are different.
A lifting force acts on the separated closed portion 12 in a direction perpendicular to the flow direction (downward in FIG. 6), and the closed portion 12 is pressed against the inner wall of the tube below. Therefore, a wide channel space is stably maintained above it, allowing smooth flow of liquid.

Furthermore, as shown in FIG. 7, even if the blood preservation solution is flowed in the opposite direction to that in FIG. 6 (for example, from the third bag 33 to the first bag 31 in FIG. 5), For the same reason as explained in connection with FIG. 6, a lifting force acts on the separated closing portion 12, and the separated closing portion 12 maintains a smooth flow of liquid without blocking the opening of the hollow body portion 11.

[Effects of the Invention] The tube communication device of the present invention is a tube communication device consisting of a tube and a communication body provided in the tube, and the communication body is in contact with the inner surface of the tube over the entire circumferential direction. a fixed hollow body portion having an outer surface that is fixed; an elongated closing portion having an outer surface continuous with the outer surface of the hollow body portion and extending axially from one end of the hollow body portion; an annular thin-walled part that separates the closed part by a force applied from the outside of the tube near the body and communicates the inside of the hollow body with the inside of the tube; The outer surface of the tube is formed of a curved surface, and in particular, the tip of the communicating body, which may come into contact with the inner surface of the tube, is formed of a rounded curved surface and has no so-called edges. It is possible to prevent damage to the tube due to contact between the inner surface of the tube and the tip of the communicating body during centrifugation.

[Brief explanation of drawings]

FIG. 1 is a partially sectional side view of a communicating body used in an embodiment of the tube communicating device of the present invention, FIG. 2 is a plan view of the vicinity of the closed part of the communicating body shown in FIG. 1, and FIG. The figure shows a tube communication device with a communication body attached to the tube, FIG. 4 is a perspective view of a communication body used in another embodiment of the tube communication device of the present invention, and FIG. 6 and 7 are explanatory diagrams for explaining the operation of the tube communication device of the present invention, and FIG. 8 is a plan view showing a multiple blood bag incorporating the tube communication device of the present invention. FIG. 3 is a perspective view of a communication body used in the tube communication device. 10...Communication body, 11...Hollow body part, 12...
Obstructed portion, 15... Thin walled portion, 20... Tube.

Claims (1)

[Claims] 1. A tube communication device consisting of a tube and a communication body provided within the tube, wherein the communication body is a fixed hollow body having an outer surface that contacts the inner surface of the tube over the entire circumferential direction. an elongated closing part having an outer surface continuous with the outer surface of the hollow body and extending axially outward from one end of the hollow body, and a closed part provided from outside of the tube near the hollow body. It has an annular thin wall part that separates the closed part by force and communicates the inside of the hollow body part and the inside of the tube, and further, the outer surface of the tip of the closed part is formed as a curved surface. A tube communication device featuring: