Medical bag

Abstract

To prevent liquid leakage during the distribution and storage of medical bags. [Solution] The medical bag 10 comprises a bag body 12 whose interior is divided into a first space 24 and a second space 26 by a partition 22, a first liquid M1 contained in the first space 24, and a second liquid M2 contained in the second space 26. The partition 22 has a partition seal 30 and a pair of side seals 32. In each of the pair of side seals 32, the seal length L, which is the length along the length direction of the bag, is 40 mm or more, and the seal width W, which is the width along the width direction of the bag, is 5 mm or more.

Description

Technical Field

[0001] The present invention relates to a medical bag.

Background Art

[0002] For example, in a dialysis solution bag which is a kind of medical bag, the inside of the bag body is partitioned into a first space and a second space by a partition part (weak seal part). Different liquids are respectively stored in the first space and the second space. In use, the partition part is peeled off to communicate the first space and the second space and mix the liquids. Such a medical bag is disclosed in, for example, Japanese Patent No. 7021303.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] During the distribution and storage of a medical bag, in order to protect the partition part, the medical bag is in a folded state at the partition part. In such a folded state, there is a concern that the bag body may bend at an acute angle at the non-sealed part near the partition part on both sides in the bag width direction of the bag body. When such an acute-angle bend occurs, wear due to rubbing is likely to occur at the bent portion, which may cause liquid leakage.

[0005] An object of the present invention is to solve the above-described problems.

Means for Solving the Problems

[0006] (1) An aspect of the present disclosure is a medical bag comprising a bag body made of a flexible sheet material, the interior of which is divided into a first space and a second space by a partition, a first liquid contained in the first space, and a second liquid contained in the second space, wherein the partition has a partition seal extending in the width direction of the bag and capable of connecting the first space and the second space by peeling, and a pair of side seals provided at both ends of the partition seal in the width direction of the bag and extending in the length direction of the bag intersecting the width direction of the bag, wherein in each of the pair of side seals, the seal length along the length direction of the bag is 40 mm or more, and the seal width along the width direction of the bag is 5 mm or more.

[0007] By setting the seal length and seal width of the side seal as described above, it is possible to prevent sharp bending at the unsealed area near the side seal even when the medical bag is folded at the partition. This suppresses wear on the bag body due to friction and prevents liquid leakage.

[0008] (2) In the medical bag described in item (1) above, the seal length may be 50 mm or more.

[0009] This configuration makes it possible to more effectively suppress sharp bending in the unsealed portion near the side seal.

[0010] (3) In the medical bag described in item (1) or (2) above, each of the pair of side seals may have a first extension extending from the partition seal in the direction of the length of the bag and adjacent to the first space, and a second extension extending from the partition seal in the direction of the length of the bag and adjacent to the second space.

[0011] With this configuration, since both ends of the side seal are positioned away from the bulkhead seal, sharp bending in the unsealed area near the side seal can be suppressed more effectively.

[0012] (4) In the medical bag described in item (3) above, the extension length of the first extension from the partition seal may be 15 mm or more, and the extension length of the second extension from the partition seal may be 15 mm or more.

[0013] With this configuration, since both ends of the side seal are positioned sufficiently far from the bulkhead seal, sharp bending in the unsealed area near the side seal can be suppressed more effectively.

[0014] (5) In the medical bag described in item (1) or (2) above, the second space is smaller than the first space, and each of the pair of side seals has an extension that extends from the partition seal in the direction of the length of the bag and is adjacent to the second space, and the extension length of the extension from the partition seal of the extension may be 15 mm or more.

[0015] When folding a medical bag, the second bag section, which has a relatively smaller volume, is lifted and placed on top of the first bag section, making it easier for bending forces to act on the side closer to the second space. By setting the extension length of the extension adjacent to the second space as described above, sharp bending at the unsealed portion near the side seal can be suppressed even more effectively.

[0016] (6) In a medical bag described in any one of the above items (1) to (4), each of the pair of side seals may be provided with an arc-shaped curved portion at both ends in the length direction of the bag.

[0017] With this configuration, the length of the straight section along the width direction of the bag is shortened at both ends of the side seal. Therefore, sharp bends in the non-sealed area near the side seal can be suppressed more effectively. [Effects of the Invention]

[0018] According to the present disclosure, even when the medical bag is folded at the partition portion, it is possible to prevent sharp bending in the unsealed portion near the side seal. For this reason, wear of the bag body due to rubbing is suppressed, and liquid leakage can be suppressed.

Brief Description of the Drawings

[0019] [Figure 1] FIG. 1 is a plan view of a medical bag according to the present embodiment. [Figure 2] FIG. 2 is a partially enlarged view of the medical bag. [Figure 3] FIG. 3A is a side view of the medical bag in a folded-back state. FIG. 3B is a side view of a medical bag according to a comparative example in a folded-back state. [Figure 4] FIG. 4 is a table showing test results for confirming the effects of the medical bag according to the present embodiment.

Modes for Carrying Out the Invention

[0020] The medical bag 10 shown in FIG. 1 is, for example, a dialysis fluid bag. The medical bag 10 may be an infusion bag or the like. The medical bag 10 includes a bag body the first liquid M1, and the second liquid M2. The bag body 12 is composed of a flexible sheet material 13. For manufacturing the bag body the sheet material 13 formed in a tubular shape by an inflation molding method or the like is used. The sheet material 13 is composed of, for example, polyvinyl chloride, polyethylene, polypropylene, or the like. A bag-shaped bag body 12 is formed by heat-sealing a predetermined portion of the tubular sheet material 13. Hereinafter, the X direction in FIG. 1 is referred to as the "bag width direction", and the Y direction in FIG. 1 is referred to as the "bag length direction". The bag width direction is the left-right direction of the medical bag 10.

[0021] The bag body 12 has a first end seal 14, an inlet port 16, a tube 18, a second end seal 20, a partition portion 22, a first space 24, and a second space 26. The first end seal 14 is provided at one end of the bag body 12 in the bag length direction. The first end seal 14 extends in the bag width direction. In the bag width direction, both ends of the first end seal 14 reach the edges 120 on both sides of the bag body 12, respectively.

[0022] The inlet port 16 and the tube 18 are provided on the first end seal 14. The inlet port 16 is a port for injecting the first liquid M1 into the first space 24. The tube 18 is a flow path member for discharging the liquid from within the bag body 12 and extends from the first end seal 14.

[0023] The second end seal 20 is provided at the other end of the bag body 12 in the bag length direction. The second end seal 20 extends in the bag width direction. In the bag width direction, both ends of the second end seal 20 reach the edges 120 on both sides of the bag body 12, respectively.

[0024] The interior of the bag body 12 is partitioned by the partition portion 22 into a first space 24 and a second space 26. For this reason, the bag body 12 has a first bag portion 121 that forms the first space 24 and a second bag portion 122 that forms the second space 26. The partition portion 22 is a weak seal portion that can be peeled off by a force of a predetermined level or more. In the bag width direction, both ends of the partition portion 22 reach the edges 120 on both sides of the bag body 12, respectively.

[0025] The partition portion 22 has a partition seal 30 and a pair of side seals 32. The partition seal 30 can communicate the first space 24 and the second space 26 by being peeled off. Before use of the medical bag 10, that is, during transportation and storage, the medical bag 10 is folded at the partition portion 22, and the first bag portion 121 and the second bag portion 122 are in a state of overlapping each other (folded state). Hereinafter, such a state is referred to as the "folded state".

[0026] In this embodiment, the volume of the first space 24 is larger than the volume of the second space 26. However, the volume of the first space 24 may be smaller than the volume of the second space 26, or it may be the same as the volume of the second space 26. The first space 24 contains the first liquid M1. The second space 26 contains the second liquid M2. For example, an acidic solution containing an acidic and stable component and a buffer solution (pH adjuster) or alkaline solution to neutralize it are contained in the first space 24 and the second space 26, respectively. The amount of the first liquid M1 is, for example, 800 mL to 2000 mL. The amount of the second liquid M2 is, for example, 200 mL to 500 mL. The medical bag 10 is sterilized, for example, by autoclave sterilization.

[0027] Before the medical bag 10 is used (before the partition 22 is removed), the first space 24 and the second space 26 are not in communication, so the first liquid M1 and the second liquid M2 are not mixed. This prevents alteration, deterioration, etc., of the first liquid M1 and the second liquid M2. When using the bag, the partition 22 is removed to connect the first space 24 and the second space 26, and the first liquid M1 and the second liquid M2 are mixed.

[0028] The liquid obtained by mixing the first liquid M1 and the second liquid M2 (the mixed solution) is, for example, peritoneal dialysis fluid. The volume of the mixed solution is, for example, 1000 mL to 2500 mL. Note that the mixed solution is not limited to peritoneal dialysis fluid, but may also be, for example, physiological saline, electrolyte solution, Ringer's solution, high-calorie intravenous fluid, glucose solution, sterile water for injection, oral nutritional supplements, etc.

[0029] The partition seal 30 extends in the bag width direction. A peel-promoting portion 34 is provided on the side of the partition seal 30 adjacent to the first space 24. The peel-promoting portion 34 has a plurality of V-shaped protrusions and a plurality of V-shaped recesses arranged alternately in the bag width direction. The peel-promoting portion 34 is not provided at both ends of the partition seal 30 in the bag width direction. Hereinafter, the width of the general portion 340 of the partition seal 30, which is the part where the peel-promoting portion 34 is not provided, will be referred to as the "partition seal width W1". To obtain an appropriate sealing strength for the partition seal 30, the partition seal width W1 is set to, for example, 5 mm to 15 mm. The partition seal width W1 is more preferably set to 8 mm to 12 mm. The partition seal width W1 is, for example, 10 mm.

[0030] A pair of side seals 32 are provided at both ends of the partition seal 30 in the bag width direction. The pair of side seals 32 extend in the bag length direction (Y direction) which intersects (orthogonal in this embodiment) the bag width direction.

[0031] Each side seal 32 has a pair of extensions 36 that extend from the partition seal 30 in the length direction of the bag. Hereinafter, one of the pair of extensions 36 will be referred to as the "first extension 36a" and the other as the "second extension 36b". The first extension 36a and the second extension 36b extend from the partition seal 30 in opposite directions. The first extension 36a extends from the partition seal 30 so as to be adjacent to the first space 24. That is, the first extension 36a extends from the partition seal 30 toward the first end seal 14. The second extension 36b extends from the partition seal 30 so as to be adjacent to the second space 26. That is, the second extension 36b extends from the partition seal 30 toward the second end seal 20.

[0032] In the peripheral edge 12a of the bag body 12, there are no seals (fused portions) between the first end seal 14 and the partition portion 22 (side seal 32), and no seals (fused portions) between the partition portion 22 and the second end seal 20. That is, there are no seals on either side of the first space 24 in the bag width direction. Also, there are no seals on either side of the second space 26 in the bag width direction. Thus, the area in which seals are provided in the peripheral edge 12a of the bag body 12 is not the entire circumference of the peripheral edge 12a, but only a part of the peripheral edge 12a.

[0033] Next, with reference to Figure 2, the details of the side seals 32 will be described. In each side seal 32, the seal length L, which is the length along the length direction of the bag, is 40 mm or more. Preferably, the seal length L is 50 mm or more. In each side seal 32, the seal width W, which is the width along the width direction of the bag, is 5 mm or more.

[0034] In this embodiment, when the portion connecting the partition seal 30 and the side seal 32 (connecting portion 31) is curved in an arc shape, the seal width W is the distance between portions of the side seal 32 that are substantially parallel to the bag length direction. If there is no portion of the side seal 32 adjacent to the first space 24 or the second space 26 that is substantially parallel to the bag length direction, the width of the central portion of the first extension portion 36a or the second extension portion 36b in the bag length direction may be used as the seal width W. The reason why the portion connecting the partition seal 30 and the side seal 32 is curved in an arc shape is to allow the bag body 12 containing the first liquid M1 and the second liquid M2 to expand naturally and to suppress the occurrence of wrinkles in the bag body 12.

[0035] The extension length L1 of the first extension portion 36a from the partition seal 30 (general portion 340) is, for example, 15 mm or more. Preferably, the extension length L1 of the first extension portion 36a is 20 mm or more. The extension length L2 of the second extension portion 36b from the partition seal 30 (general portion 340) is, for example, 15 mm or more. Preferably, the extension length L2 of the second extension portion 36b is 20 mm or more.

[0036] Each side seal 32 is provided with a curved portion 38 that curves in an arc shape at both ends in the bag length direction. The curved portion 38a provided at the tip of the first extension 36a is curved so as to be convex toward the first space 24. The curved portion 38b provided at the tip of the second extension 36b is curved so as to be convex toward the second space 26. The dimension of the curved portion 38 in the bag width direction (curve width Wc) is, for example, 50% to 100% of the seal width W.

[0037] This embodiment provides the following effects.

[0038] As described above, the partition 22 provided in the bag body 12 of the medical bag 10 has a partition seal 30 and a pair of side seals 32. In each side seal 32, the seal length L, which is the length along the length direction of the bag, is 40 mm or more, and the seal width W, which is the width along the width direction of the bag, is 5 mm or more.

[0039] By setting the seal length L and seal width W of the side seal 32 as described above, as shown in Figure 3A, it is possible to prevent sharp bending in the unsealed portion 40 near the side seal 32 (near the boundary between the side seal 32 and the unsealed portion 40) even when the medical bag 10 is folded over. In other words, when the medical bag 10 is folded over, the side seal 32 curves in a U-shape. This is because the tip 32t of the side seal 32 is sufficiently far from the partition seal 30, so that the starting point of the pushback is the middle part of the side seal 32 rather than the unsealed portion 40. By preventing sharp bending in the unsealed portion 40 in this way, wear of the bag body 12 due to abrasion is suppressed, and liquid leakage can be suppressed.

[0040] On the other hand, in the medical bag 10R of the comparative example shown in Figure 3B, the seal length of the side seal 32R is less than 40 mm and the seal width is less than 5 mm. When the seal length and seal width of the side seal 32R are less than the specified values, when the medical bag 10R is folded over, sharp bends (V-shaped bends) are likely to occur in the unsealed portion 40 near the side seal 32R. When sharp bends occur, abrasion due to friction is likely to occur at the bent area, which can cause liquid leakage.

[0041] In Figure 2, when the seal length L is 50 mm or more, sharp bending at the non-sealed portion 40 near the side seal 32 can be suppressed even more effectively.

[0042] Each side seal 32 has a first extension portion 36a that extends from the partition seal 30 in the length direction of the bag and is adjacent to the first space 24, and a second extension portion 36b that extends from the partition seal 30 in the length direction of the bag and is adjacent to the second space 26. With this configuration, since both ends of the side seal 32 are provided at positions spaced apart from the partition seal 30, sharp bending in the non-sealed portion 40 near the side seal 32 can be suppressed more effectively.

[0043] The extension length L1 of the first extension portion 36a from the bulkhead seal 30 is 15 mm or more, and the extension length L2 of the second extension portion 36b from the bulkhead seal 30 is 15 mm or more. With this configuration, since both ends of the side seal 32 are provided at a position sufficiently far from the bulkhead seal 30, sharp bending in the non-sealed portion 40 near the side seal 32 can be suppressed more effectively.

[0044] As shown in Figure 3A, when folding the medical bag 10, the second bag portion 122, which has a relatively smaller volume, is lifted and placed on top of the first bag portion 121, so the bending force is more likely to act on the side closer to the second space 26. As shown in Figure 2, in this embodiment, by setting the extension length L2 of the second extension portion 36b adjacent to the second space 26 to 15 mm or more, the distance from the partition seal 30 to the tip of the second extension portion 36b becomes larger. Therefore, sharp bending in the non-sealed portion 40 near the side seal 32 can be suppressed more effectively.

[0045] As shown in Figure 2, each side seal 32 is provided with a curved portion 38 that curves in an arc shape at both ends in the bag length direction. With this configuration, the length of the straight portion 38s along the bag width direction (X direction) is shortened at both ends of the side seal 32. Therefore, sharp bending at the non-sealed portion 40 near the side seal 32 can be suppressed more effectively.

[0046] Figure 4 shows the test results to confirm the effectiveness of the medical bag 10. Example 1 has a seal length of 50 mm and a seal width of 5 mm. Example 2 has a seal length of 40 mm and a seal width of 5 mm. Comparative Example 1 has a seal length of 30 mm and a seal width of 5 mm. Comparative Example 2 has a seal length of 50 mm and a seal width of 2-3 mm. For each of Example 1, Example 2, Comparative Example 1, and Comparative Example 2, four samples (medical bags) were tested to check for the presence or absence of sharp bends at the unsealed portion. Each sample contained a first liquid and a second liquid, with the amount of the first liquid being 1200 mL and the amount of the second liquid being 300 mL.

[0047] As can be seen from Figure 4, in Examples 1 and 2, when the medical bag was folded, the side seal curved in a U-shape, and no sharp bend occurred in the unsealed area. On the other hand, in Comparative Examples 1 and 2, there were samples in which sharp bends occurred in the unsealed area. In the case of Comparative Example 2, it is thought that the seal width was too small, making it easier for the unsealed area near the side seal to bend sharply when the medical bag was folded. Based on these test results, it was confirmed that, as shown in Figure 2, by setting the seal length L of the side seal 32 to 40 mm or more and the seal width W to 5 mm or more, it is possible to prevent sharp bends in the unsealed area near the side seal 32.

[0048] While this disclosure has been described in detail, it is not limited to the individual embodiments described above. These embodiments can be added, replaced, modified, partially deleted, etc., in any way that does not depart from the gist of this disclosure or from the intent of this disclosure derived from the claims and their equivalents. These embodiments can also be implemented in combination. For example, the order of operations and processes in the embodiments described above are given as examples only and are not limited thereto. The same applies when numerical values ​​or mathematical formulas are used in the description of the embodiments described above. [Explanation of symbols]

[0049] 10…Medical bag 12…Bag body 13…Sheet material 22…Partition 24...First space 26...Second space 30... Bulkhead seal 32... Side seal 36...Extension part 36a...First extension part 36b...Second extension section 38, 38a, 38b...Curved sections M1...First liquid M2...Second liquid

Claims

1. The bag body is made of a flexible sheet material, and its interior is divided into a first space and a second space by a partition. The first liquid contained in the first space, The second liquid contained in the second space, A medical bag equipped with, The aforementioned partition is, A partition seal extending in the width direction of the bag, which can be peeled off to connect the first space and the second space, The bag has a pair of side seals, each provided at both ends of the partition seal in the width direction of the bag and extending in the length direction of the bag that intersects the width direction of the bag, A medical bag in which each of the pair of side seals has a seal length of 40 mm or more along the length direction of the bag, and a seal width of 5 mm or more along the width direction of the bag.

2. In the medical bag according to claim 1, A medical bag having a seal length of 50 mm or more.

3. In the medical bag according to claim 1, Each of the pair of side seals is A first extension portion extending from the partition seal in the length direction of the bag and adjacent to the first space, A medical bag having a second extension portion that extends from the partition seal in the length direction of the bag and is adjacent to the second space.

4. In the medical bag according to claim 3, The extension length of the first extension from the partition seal is 15 mm or more. A medical bag in which the extension length of the second extension portion from the partition seal is 15 mm or more.

5. In the medical bag according to claim 1, The second space is smaller than the first space. Each of the pair of side seals has an extension that extends from the partition seal in the length direction of the bag and is adjacent to the second space, A medical bag in which the extension portion extends 15 mm or more from the partition seal.

6. In a medical bag according to any one of claims 1 to 5, A medical bag, wherein each of the pair of side seals is provided with a curved portion that curves in an arc shape at both ends in the length direction of the bag.

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