JPH0237780B2 - - Google Patents

Description

〔Technical field〕

The present invention relates to a tube communication device, and more particularly, to a tube communication device capable of initially maintaining a closed state of the tube and then allowing the tube to communicate by separating the tube. [Prior Art and Problems] For the preparation of blood component rings and blood products, so-called multiple blood bags, in which a plurality of bags are connected by tubes, are used. For example, blood is collected in a first bag, subjected to centrifugation, and then supernatant plasma is transferred to a second bag via a tube.
This second bag is separated and used separately to obtain a plasma product. The third bag contains a blood preservation solution, and after separating the second bag, the blood preservation solution is transferred via a tube to the first bag containing blood cell 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. Conventionally, as a communication device for such a tube, a hollow body part made of a cylindrical body fixed to the inner wall of the tube, and a hollow body part connected to the hollow body part through a thin wall part are used.
It is known that the tube consists of a closed portion having an outer diameter smaller than the inner diameter of the tube. The closing portion consists of a base end portion having approximately the same diameter, and a distal end portion whose opposing surfaces form a taper having the same inclination angle and whose thickness becomes thinner toward the distal end. When connecting the tubes, the tubes are disconnected at this closed portion to achieve communication between the tubes. However, in conventional tube communication devices, blood within the tubes may not flow smoothly after the tubes have been communicated.
In addition, especially when attempting to flow the liquid in the opposite direction (i.e., from the tip of the communication device toward the substrate), the separated blockage remains near the opening of the communication section, making it difficult to ensure a reliable flow. It may interfere with the formation of tracts. OBJECT OF THE INVENTION Therefore, an object of the present invention is to provide a tube communication device that can smoothly flow the liquid in the tube in both forward and reverse directions, and can also reliably form a flow path in the tube. be. 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 fixed to the tube; 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; an annular thin walled portion that separates the closed portion by a force applied from outside of the tube and communicates the inside of the hollow body portion with the inside of the tube;
The width of the maximum part of the closing part is smaller than the inner diameter of the tube, and the closing part has two opposing surfaces, and each of the two opposing surfaces has a width smaller than an inner diameter of the tube. In this tube communication device, the length of the surface portion from the proximal end of the surface portion to the distal end of the closing portion is different. Preferably, one of the two opposing surfaces of the closing portion is a flat inclined surface, and the other surface is a curved surface. Further, it is preferable that the two opposing surfaces of the closing portion are both curved surfaces, and that the respective curved surfaces are curved surfaces of different shapes. Furthermore, it is preferable that the thickness of the closing portion decreases toward the tip. DETAILED DESCRIPTION OF THE INVENTION 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 having an outer surface in contact with the inner surface of the tube 20 over the entire circumferential direction, and a hollow body portion 11 fixed to the tube 20.
, an elongated closing part 12 having an outer surface continuous with the outer surface of the hollow body part 11 and extending axially outward from one end of the hollow body part 11 ; The occluded portion 1 is closed by the applied force.
It has an annular thin wall portion 15 that separates the tube 2 and communicates the inside of the hollow body portion 11 and the inside of the tube 20, and
The width of the maximum part of the closure part 12 is smaller than the inner diameter of the tube 20, and the width of the closure part 12 is smaller than the inner diameter of the tube 20.
has two opposing surface portions 13 and 14, and the two opposing surface portions 13 and 14 have different lengths from the base end of each surface portion to the tip of the closing portion 12. It is something that exists. 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 having a width at its maximum portion smaller than the inner diameter of the tube 20, and therefore does not come into contact with the tube under normal conditions. Furthermore, the elongated body constituting the closure part 12 is a locus of points equidistant from the straight line connecting the center 12b of the tip and the center 12a of the thin part 15 and the two opposing surfaces of the outer surface of the closure part. It is preferable to have a warp between the center line and the center line. Also,
The centerline may be a straight line or a curved line. Specifically, as shown in FIG. 1, the closing portion 12 has two opposing surfaces 13 and 14, and these two surfaces 13 and 14 are connected to the proximal end of each surface. The lengths from the end to the tip of the closing portion 12 are different. In other words, as shown in FIGS. 1 and 3, the surface portion 13 has a curved surface and the surface portion 14 has a flat inclined surface. The length from the proximal end to the distal end of the closure part 12 is longer. Furthermore, as shown in FIG. 2, it is preferable that a recess 16 is formed at the tip of the closing part 12 in order to smooth the flow of liquid such as blood, and the surface of the recess 16 is preferably formed with a tube. It is preferable that the surface has a satin finish so that it does not stick even if it comes into contact with the material. As shown in FIG. 3, the communication body 10 shown in FIGS. 1 and 2 is installed in a tube 20 in which communication is to be achieved, with the hollow body portion 11 fixed to the inner wall of the tube. There is no need to limit the length of the hollow body as a cylindrical body, and in practical terms, it may have an outer diameter and a length that allows it to be stably fixed within the tube. More specifically, for example, a tube 21 connected to a first bag and a tube 22 connected to a second and third bag are fitted at both ends to form a tube 20, and this tube 20 is inserted into the tube 20. Install the tube communication device of the invention. FIG. 4 shows a perspective view of a tube communication device according to a second aspect of the invention. This communication device has the same construction as the communication device shown in FIGS. 1 and 2, except that the opposing surfaces 13' and 14' of the closing portion both constitute curved surfaces. The tube communication device of the present invention includes, for example, the fifth tube communication device.
It is used by being incorporated into a multiple blood bag device as shown in the figure. This multiple blood bag device includes a first bag 30, a second bag 31, and a third bag for blood collection.
It is equipped with a badge 32. A blood sampling needle 34 is connected to the first bag via a tube 33. The first bag 30 and the third bag 33 are connected by a flexible tube 22, and the second bag 32
A tube 35 branching from the tube 22 is connected to the tube. The tube 22 is connected to the first bag 3
The short tube 21 directly connected to the tube 20 is connected to the tube 20 as shown in FIG. In operation, blood is collected from the blood collection needle 34 into the first blood bag, and after centrifugation, the communication device of the present invention establishes communication between the tubes 21 and 22, and the supernatant plasma is transferred to the tube. to the second bag. This second bag is separated and used separately to obtain a plasma product. The third bag contains a blood preservation solution, and after separating the second bag, the blood preservation solution is transferred via a tube to the first bag containing blood cell components. The present invention can also be applied to other devices that require aseptic communication, such as a tube connected to a fluid bag. Effect of the Invention Now, when attempting to connect a tube that was initially blocked using the tube communication device of the present invention, the explanation will be given with reference to FIG. The closing portion 12 is separated from the hollow body portion 11 by bending.
This separation achieves the opening of the hollow body through which the tubes 21 and 22 communicate and allow free flow of liquid. After separating the occluded portion 12, when plasma is allowed to flow in the direction shown by the arrow in FIG. 6 (for example, from the first bag 30 to the second bag 31 in FIG. 5), the occluded portion 12 As shown, the two opposing surfaces 13 and 14 have different shapes such that one surface 13 is a curved surface and the other surface 14 is a flat sloped surface.
Since the length from the proximal end of the face part to the tip of the blocking part 12 is longer, the flow path lengths on the opposing upper and lower surfaces of the blocking part 12 are different, and the flow path length is slightly longer on the face part 13 side. Since the fluid receives a slightly stronger force from the surface portion 14 side, 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 pushed against the inner wall of the tube below. It will be forced on you. 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 shown 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. EXPERIMENTAL EXAMPLE The flow rate of fluid after communication was measured using a 60 cm drop method using a conventional communication device as shown in FIG. 8 and a communication device of the present invention. The results are listed in the table below. The units are seconds/100ml.

[Table] * Direction of the arrow in Figure 6 ** Direction of the arrow in Figure 7 Effect of the Invention As described above, according to the tube communication device of the present invention, after the tube communication is achieved, it can be used in both the forward and reverse directions. Stable fluid flow is maintained.

[Brief explanation of drawings]

FIG. 1 is a partially sectional side view of the tube communication device of the present invention, FIG. 2 is a plan view of the portion of the device shown in FIG. 1, and FIG. A cross-sectional view showing the state shown in FIG. 4 is as follows.
FIG. 5 is a perspective view of a communication device (tube not shown) according to the second aspect of the invention, and FIGS. 6 and 7 are plan views showing multiple blood bags incorporating the communication device of the invention. The figure is a sectional view for explaining the operation of the communication device of the present invention, and FIG. 8 is a perspective view of a conventional communication device (tube not shown). 11...Hollow body part, 12...Closing part, 13,1
4, 13', 14'... Opposing surfaces (of the closed part), 15... Thin wall portion, 20, 21, 22... Tube.

Claims (1)

[Scope of Claims] 1. A tube communication device comprising a tube and a communication body provided within the tube, wherein the communication body has an outer surface that contacts the inner surface of the tube over the entire circumferential direction. , a hollow body fixed to the tube, 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 the hollow body an annular thin-walled portion that separates the blocking portion by a force applied from outside of the tube and communicates the inside of the hollow body with the inside of the tube; The width of the largest part of the section is smaller than the inner diameter of the tube, and the closing section has two opposing surfaces, and the two opposing surfaces extend from the proximal end of each surface to the A tube communication device characterized in that the length of the closed part to the tip of the tube is different. 2. The tube communication device according to claim 1, wherein one of the two opposing surfaces of the closing portion is a flat inclined surface and the other surface is a curved surface. 3. The tube communication device according to claim 1, wherein the two opposing surfaces of the closing portion are both curved surfaces, and each curved surface has a different shape. 4. The tube communication device according to any one of claims 1 to 3, wherein the thickness of the blocking portion becomes thinner toward the distal end.