A leak-proof mother-daughter bag for pathological specimens

Abstract

This application provides a leak-proof mother-daughter bag for pathological specimens, comprising a bag body and a sealing strip. The bag body is formed by heat-pressing an outer membrane layer, a first membrane layer, a second membrane layer, and a bottom membrane layer along the edges, with the open side serving as the bag opening. The sealing strip is located at the bag opening. The bag body includes a mother bag and a daughter bag. The mother bag is used to store the specimen soaking solution, and the daughter bag is used to hold the pathological specimen. A first pressure-contact sealing strip is provided between the mother bag and the daughter bag, and a second pressure-contact sealing strip is provided inside the daughter bag. This application forms a two-stage leak-proof barrier by setting up double pressure-contact sealing strips, which can effectively ensure that it is not easy to open and leak during transportation vibration or accidental squeezing, significantly reducing the risk of specimen soaking solution leakage. In use, the specimen is simply placed into the daughter bag and then the mother bag is squeezed to complete the proper storage of the specimen in a sealed environment. Throughout the process, the operator is completely isolated from the soaking solution, effectively ensuring the safety of the operator.

Description

Technical Field

[0001] This application relates to a leak-proof mother-daughter bag for pathological specimens, belonging to the field of medical device technology. Background Technology

[0002] In the fields of surgery and pathological diagnosis, the standardized preservation of pathological specimens is a crucial step in ensuring diagnostic accuracy. With the increasing incidence of cancer each year, the number of intraoperative pathological specimens has surged, placing higher demands on specimen preservation techniques. Currently, neutral formalin solution (containing 37%-40% formaldehyde) is commonly used clinically as a fixative, combined with sealed bags for preservation.

[0003] Chinese patent CN 215437688U describes a method for separating a mother bag and a daughter bag in a pathological specimen mother-daughter bag using a raised-concave sealing strip, and then sealing the entire bag with another raised-concave sealing strip to separate formalin. However, the actual sealing effect of the raised-concave sealing strip is limited. During transportation, the formalin solution in the mother bag gradually leaks into the daughter bag, and then leaks out through the daughter bag, contaminating the entire packaging bag inside the box, and producing irritating odors and harmful gases, which is detrimental to the safety of medical personnel.

[0004] Another Chinese patent, CN 216510134U, describes a disposable pathological specimen mother-daughter bag, which also uses an upper and lower bag design. A raised and recessed sealing strip is set between the daughter bag and the mother bag. However, a fixing clamp with better sealing performance is set at the daughter bag. Although this can prevent liquid from overflowing out of the daughter bag, it still cannot prevent liquid from leaking from the mother bag into the daughter bag.

[0005] In summary, the leak-proof performance of existing sealed mother-daughter bags during transportation and handling needs improvement. Traditional convex and concave sealing strips are not convenient to open in actual use and are prone to contact with formalin solution. In addition, traditional mother-daughter bags are not stable after specimens are placed inside, and the bags are prone to tilting.

[0006] With the increasing demands for operational safety in the medical industry, the development of a mother-daughter bag that is pre-sealed, easy to use, and safe to operate has become an urgent need. Utility Model Content

[0007] To address the aforementioned issues, a leak-proof mother-daughter bag for pathological specimens is provided. By incorporating a double-pressure sealing strip, a two-stage leak-proof barrier is formed, effectively preventing leakage during transport vibrations or accidental compression. This significantly reduces the risk of specimen soaking solution leakage. Furthermore, during use, simply place the specimen into the daughter bag and squeeze the mother bag to ensure proper specimen storage in a sealed environment. Throughout the process, the operator is completely isolated from the soaking solution, effectively guaranteeing the operator's safety.

[0008] According to one aspect of this application, a leak-proof pathological specimen mother-daughter bag is provided, comprising a bag body and a sealing strip; the bag body is formed by hot pressing an outer membrane layer, a first membrane layer, a second membrane layer and a bottom membrane layer along the edge, with the open side serving as the bag opening, and the sealing strip is disposed at the bag opening;

[0009] The bag body includes a mother bag and a daughter bag. The mother bag is used to store the specimen soaking solution, and the daughter bag is used to hold the pathological specimen. A first pressure-contact sealing strip is provided between the mother bag and the daughter bag, and a second pressure-contact sealing strip is provided inside the daughter bag.

[0010] The length of the outer membrane layer is less than that of the first membrane layer and the second membrane layer; the top of the outer membrane layer and the first membrane layer are fixedly connected by heat-press sealing; a fracture zone is opened near the bottom of the first membrane layer; the bottom of the outer membrane layer and the fracture zone are connected by micro-heat-press sealing to form the first pressure-contact sealing zone; the hollow part between the outer membrane layer and the first membrane layer is the mother bag.

[0011] The bottom film layer is fixedly connected to the bottom of the first film layer and the bottom of the second film layer by heat-press sealing. The second pressure-contact sealing strip is set on the first film layer and the second film layer near the bag opening and is connected by micro-heat-press sealing. The hollow part between the first film layer, the second film layer and the bottom film layer is the sub-bag.

[0012] Optionally, the first pressure-contact sealing strip has a concave structure and its triggering pressure is not less than 15N.

[0013] Optionally, the second pressure-contact sealing strip is disposed below the sealing rib, and its triggering pressure is not less than 10N.

[0014] Optionally, a plurality of guide strips may be provided along the top end of the first pressure-contact sealing strip.

[0015] Optionally, the bottom film layer is folded and then heat-pressed to the bottom of the first film layer and the second film layer for sealing and fixing. The heat-pressed shape is arc-shaped so that the bottom film layer forms a concave liquid storage area after unfolding.

[0016] Optionally, a first support node and a second support node are respectively provided on both sides of the liquid storage area;

[0017] The first support node and the second support node are arc-shaped.

[0018] Optionally, the first film layer, the second film layer, and the bottom film layer are all PET composite co-extruded films.

[0019] Optionally, the outer film layer is a PE composite co-extruded film.

[0020] Optionally, a liquid inlet is provided on the side of the mother bag.

[0021] Optionally, easy-tear openings are provided on both sides of the bag opening.

[0022] The beneficial effects of this application include, but are not limited to:

[0023] 1. The leak-proof pathological specimen mother-daughter bag of this application achieves graded protection through the design of a double pressure-contact sealing strip. The first pressure-contact sealing strip adopts a concave structure and limits the triggering pressure. Compared with the traditional concave-convex sealing strip, it can maintain a high-strength seal when not operated by humans, effectively preventing formalin solution in the mother bag from leaking into the daughter bag. In addition, the concave structure is conducive to the concentration of liquid stress, so that the seal does not need to be broken by too much force when the operator squeezes it. The second pressure-contact sealing strip is set below the sealing rib, forming a double barrier. Even if a small amount of liquid breaks through the first sealing strip due to violent squeezing during transportation, it can be intercepted by the second seal, which greatly reduces the risk of liquid spillage and completely solves the problem of double leakage from the mother bag to the daughter bag and from the daughter bag to the outside in the prior art.

[0024] 2. The leak-proof pathological specimen mother-daughter bag of this application is also equipped with a guide strip at the top of the first pressure-contact sealing strip. The guide strip can play a partial drainage role and guide medical staff to apply force precisely when it is necessary to mix specimens and fixatives. This allows the central part of the sealing strip to break more quickly when it is subjected to continuous pressure from the operator, making the operation convenient and reliable. The length difference between the outer membrane layer and the first membrane layer, combined with the fracture strip design, makes the connection operation between the mother bag and the daughter bag more controllable.

[0025] 3. The leak-proof pathological specimen mother-daughter bag of this application has an arc-shaped bottom formed by folding and hot pressing of the bottom film layer, which is a concave liquid storage area. Combined with the first and second arc-shaped support nodes on both sides, it can significantly enhance the stability of the bag when placed, reduce tilting or tipping, and effectively solve the problem of unstable center of gravity after specimens are placed in traditional mother-daughter bags. Attached Figure Description

[0026] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0027] Figure 1 This is a three-dimensional structural diagram of the leak-proof pathological specimen mother-daughter bag of Embodiment 1 of this application (the inlet is not heat-sealed).

[0028] Figure 2 This is a side view of the leak-proof pathological specimen mother-daughter bag structure of Embodiment 1 of this application (the inlet is not heat-sealed).

[0029] Figure 3This is a schematic diagram of the main plan view of the leak-proof pathological specimen mother-daughter bag in Embodiment 1 of this application (folded state).

[0030] Figure 4 for Figure 3 Enlarged structural diagram of section A in the middle;

[0031] Figure 5 This is a schematic diagram of the main plan view of the leak-proof pathological specimen mother-daughter bag in Embodiment 2 of this application (folded state).

[0032] Explanation of symbols in the diagram:

[0033] 1. Bag body, 2. Sealing strip, 3. Outer membrane layer, 4. First membrane layer, 5. Second membrane layer, 6. Bottom membrane layer, 7. Bag opening, 8. Mother bag, 9. Daughter bag, 10. First pressure-contact sealing strip, 11. Second pressure-contact sealing strip, 12. Tear strip, 13. Guide strip, 14. Concave liquid storage area, 15. First support node, 16. Second support node, 17. Liquid inlet, 18. Easy-tear opening. Detailed Implementation

[0034] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. Many specific details are set forth in the following description to provide a thorough understanding of this application; however, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0035] Furthermore, it should be understood in the description of this application that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0038] Example 1

[0039] refer to Figure 1 The embodiments of this application disclose a leak-proof pathological specimen mother-daughter bag 8, including a bag body 1 and a sealing strip 2; the bag body 1 is formed by hot pressing an outer membrane layer 3, a first membrane layer 4, a second membrane layer 5 and a bottom membrane layer 6 along the edge, with the open side being the bag opening 7, and the sealing strip 2 is set at the bag opening 7;

[0040] The bag body 1 includes a mother bag 8 and a daughter bag 9. The mother bag 8 is used to store the specimen soaking solution, and the daughter bag 9 is used to place the pathological specimen. A first pressure-contact sealing strip 10 is provided between the mother bag 8 and the daughter bag 9, and a second pressure-contact sealing strip 11 is provided inside the daughter bag 9.

[0041] The length of the outer membrane layer 3 is less than that of the first membrane layer 4 and the second membrane layer 5; the top of the outer membrane layer 3 and the first membrane layer 4 are fixedly connected by heat-press sealing; a fracture zone 12 is opened near the bottom of the first membrane layer 4; the bottom of the outer membrane layer 3 and the fracture zone 12 are connected by micro-heat-press sealing to form a first pressure-contact sealing zone 10; the hollow part between the outer membrane layer 3 and the first membrane layer 4 is the mother bag 8.

[0042] The bottom film layer 6 is fixedly connected to the bottom of the first film layer 4 and the bottom of the second film layer 5 by heat-press sealing. The second pressure-contact sealing strip 11 is set at the first film layer 4 and the second film layer 5 near the bag opening 7 and is connected by micro-heat-press sealing. The hollow part between the first film layer 4, the second film layer 5 and the bottom film layer 6 is the sub-bag 9.

[0043] Specifically, the sealing strip 2 uses commercially available self-sealing snap fasteners, and its edges are fixed to the first membrane layer 4 and the second membrane layer 5 by heat pressing. In this application, the heat-pressed sealing connection and the micro-heat-pressed sealing connection are mainly to distinguish the different purposes of the two heat-pressing methods. The heat-pressed sealing connection is for achieving a permanent seal and is suitable for the top connection between the mother bag 8 and the daughter bag 9, and the edge of the bag body 1; the micro-heat-pressed sealing connection is for forming a peelable seal, which can be broken by applying pressure exceeding the limit.

[0044] The fracture zone 12 near the bottom of the first membrane layer 4 is achieved through pre-cutting, and then the first membrane layer 4 and the outer membrane layer 3 are partially fused and bonded together at this point by micro-thermal pressure sealing, forming a first pressure-contact sealing strip 10 pressed onto the fracture zone 12. In addition, in this embodiment, the mother bag 8 is essentially placed on the side of the daughter bag 9. This design can also increase the internal space of the daughter bag 9, making it easier to put in pathological specimens.

[0045] The specific process parameters, such as temperature and pressure, differ between the two hot-pressing processes and also need to be set according to the materials used. Those skilled in the art can select and adjust them according to actual needs. In this embodiment, the first film layer 4, the second film layer 5, and the bottom film layer 6 are all commercially available PET / BOPA / MLLDPE co-extruded films, and the outer film layer 3 is a commercially available PE / BOPA co-extruded film. The specific material selection is based on performance requirements such as toughness. The above process parameters are further adjusted according to the specific materials, which will not be elaborated further in this application. In this embodiment, the hot-pressing temperature for the hot-press sealing and fixing connection is 180℃, the pressure is 0.3MPa, and the time is 3s; for the micro-hot-press sealing connection, the hot-pressing temperature is 130℃, the pressure is 0.1MPa, and the time is 3s. The film thickness is selected according to the specific specifications (capacity range), and this application does not impose specific limitations. In this embodiment, taking a 1000mL specification as an example, the thickness of the first film layer 4 and the second film layer 5 is 150µm, the thickness of the bottom film layer 6 is 120µm, and the thickness of the outer film layer 3 is 150µm.

[0046] In one embodiment, the first pressure-contact sealing strip 10 has a concave structure and its triggering pressure is not less than 15N. The second pressure-contact sealing strip 11 is disposed below the sealing rib 2 and its triggering pressure is not less than 10N.

[0047] The triggering pressure in this application refers to the pressure required to break the seal and allow the soaking solution (formalin) to enter the daughter bag 9 after the bag body 1 is filled with soaking solution (formalin) and sealed, the entire bag body 1 is held vertically and a horizontal vertical pressure is applied to the mother bag 8 for continuous squeezing (for 3 seconds). Because the pathological specimen is small in volume and the soaking solution occupies a large part of the actual internal volume, squeezing the mother bag 8 during actual operation will not affect the pathological specimen.

[0048] Specifically, the first pressure-contact sealing strip 10 adopts a concave structure, and the design of limiting its trigger pressure is not simply to increase the sealing strength. The concave structure allows the liquid to naturally converge into the concave part when it is shaken during transportation, reducing the impact on the edge of the sealing strip. At the same time, the trigger pressure is much higher than the impact force of bumps in daily transportation (the instantaneous impact force on the bag body 1 during actual transportation is usually ≤8N), and most of the forces experienced in daily transportation are instantaneous pressures, not continuous forces acting on the bag body 1. Therefore, it can ensure that the mother bag 8 and the daughter bag 9 are completely isolated and there is no liquid leakage when there is no human operation.

[0049] The second pressure-contact sealing strip 11 is positioned below the sealing rib 2 and limits the trigger pressure, forming a "secondary interception inside the sub-bag 9" as a sealing guarantee. When the first sealing strip experiences a slight leakage due to extreme conditions (such as a violent collision), the second sealing strip can achieve temporary sealing with a lower trigger pressure (easier to open in subsequent operations compared to the first sealing strip), preventing liquid from directly contacting the outer sealing rib 2. In traditional designs, liquid easily seeps along the gaps in the sealing strips, while this solution can almost completely prevent accidental leakage during transportation and handling through two sealing strips.

[0050] Specifically, a liquid inlet 17 is provided on the side of the mother bag 8. During the preparation of the bag body 1, this liquid inlet 17 is reserved. After the soaking solution (formalin) is added through the liquid inlet 17, the liquid inlet 17 is then fixed by heat-press sealing.

[0051] The outer membrane layer 3 is shorter than the first membrane layer 4 and the second membrane layer 5. Together with the fracture band 12 at the bottom of the first membrane layer 4, it forms a flow channel for the soaking solution from the mother bag 8 to the daughter bag 9. When it is necessary to mix the specimen with the fixative, medical staff can pinch part of the mother bag 8 and increase the pressure inside the mother bag 8 by squeezing, which forces the first pressure-contact sealing band 10 at the fracture band 12 to open, and the soaking solution enters the daughter bag 9 through the fracture band 12.

[0052] In one embodiment, the bottom membrane layer 6 is folded and then heat-pressed to the bottom of the first membrane layer 4 and the second membrane layer 5 for a sealed and fixed connection. The heat-pressed shape is arc-shaped so that the bottom membrane layer 6 forms a concave liquid storage area 14 after unfolding.

[0053] Furthermore, a first support node 15 and a second support node 16 are respectively provided on both sides of the liquid storage area; the first support node 15 and the second support node 16 are arc-shaped.

[0054] The bottom layer 6 is formed by folding and hot pressing to create an arc-shaped bottom, which concentrates the liquid at the bottom when the bag 1 is placed during specimen storage, resulting in a lower center of gravity. Combined with the concave liquid storage area 14, it can naturally gather the liquid fixative at the center of the bottom of the bag 1, solving the problem of center of gravity shift caused by liquid sloshing in traditional mother-daughter bags 8.

[0055] The arc-shaped support nodes (5mm radius) on both sides of the liquid storage area are formed by separate hot-press sealing, leaving a certain space at the bottom. When the vertically placed bag 1 is pressed down by natural gravity, the bottom edge will automatically expand outward. The elastic restoring force offsets the external force, and together with the support nodes, it achieves stable support, so that the bag 1 maintains a stable posture.

[0056] Furthermore, easy-tear openings 18 are provided on both sides of the bag opening 7. Specifically, the easy-tear openings 18 on both sides of the bag opening 7 adopt a V-shaped cut design, which makes it easy for medical staff wearing gloves to open quickly, and the tearing direction extends in a straight line along the edge of the bag opening 7 to avoid liquid splashing out during the tearing process.

[0057] Example 2

[0058] The difference between Embodiment 2 and Embodiment 1 is that Embodiment 2 has several guide strips 13 formed along the top end of the first pressure-contact sealing strip 10. The shape and number of the guide strips 13 are not specifically limited in this application and can be set according to actual needs.

[0059] In this embodiment, three arc-shaped guide strips 13 are provided to guide the direction of liquid flow and concentrate stress in local areas. Medical staff can also press vertically along the guide strips 13 to concentrate the force in the middle and both sides of the sealing strip, making it easier to break the seal.

[0060] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A leak-proof pathological specimen primary-secondary bag, characterized in that, It includes a bag body (1) and a sealing strip (2); the bag body (1) is formed by hot pressing an outer membrane layer (3), a first membrane layer (4), a second membrane layer (5) and a bottom membrane layer (6) along the edge, with the open side being the bag opening (7), and the sealing strip (2) is set at the bag opening (7); The bag body (1) includes a mother bag (8) and a daughter bag (9). The mother bag (8) is used to store the specimen soaking solution, and the daughter bag (9) is used to place the pathological specimen. A first pressure-contact sealing strip (10) is provided between the mother bag (8) and the daughter bag (9), and a second pressure-contact sealing strip (11) is provided inside the daughter bag (9). The length of the outer membrane layer (3) is less than that of the first membrane layer (4) and the second membrane layer (5); the top of the outer membrane layer (3) and the first membrane layer (4) are fixedly connected by heat-press sealing, and a fracture strip (12) is opened near the bottom of the first membrane layer (4). The bottom of the outer membrane layer (3) and the fracture strip (12) are connected by micro-heat-press sealing to form the first pressure-contact sealing strip (10). The hollow part between the outer membrane layer (3) and the first membrane layer (4) is the mother bag (8). The bottom film layer (6) is fixedly connected to the bottom of the first film layer (4) and the bottom of the second film layer (5) by heat-press sealing. The second pressure-touch sealing strip (11) is set on the first film layer (4) and the second film layer (5) near the bag opening (7) and is connected by micro-heat-press sealing. The hollow part between the first film layer (4), the second film layer (5) and the bottom film layer (6) is the sub-bag (9).

2. The leak-proof pathological specimen mother-daughter bag according to claim 1, characterized in that, The first pressure-contact sealing strip (10) has a concave structure and its triggering pressure is not less than 15N.

3. The leak-proof pathological specimen mother-daughter bag according to claim 1, characterized in that, The second pressure-contact sealing strip (11) is located below the sealing rib (2), and its triggering pressure is not less than 10N.

4. The leak-proof pathological specimen mother-daughter bag according to claim 2, characterized in that, Several guide strips (13) are provided along the top end of the first pressure-contact sealing strip (10).

5. The leak-proof pathological specimen mother-daughter bag according to claim 1, characterized in that, The bottom film layer (6) is folded and then hot-pressed to the bottom of the first film layer (4) and the second film layer (5). The hot-pressed shape is arc-shaped so that the bottom film layer (6) forms a concave liquid storage area (14) after unfolding.

6. The leak-proof pathological specimen mother-daughter bag according to claim 5, characterized in that, The concave liquid storage area is provided with a first support node (15) and a second support node (16) on both sides respectively. The first support node (15) and the second support node (16) are arc-shaped.

7. The leak-proof pathological specimen mother-daughter bag according to claim 1, characterized in that, The first film layer (4), the second film layer (5), and the bottom film layer (6) are all PET composite co-extruded films.

8. The leak-proof pathological specimen mother-daughter bag according to claim 1, characterized in that, The outer membrane layer (3) is a PE composite co-extruded membrane.

9. The leak-proof pathological specimen mother-daughter bag according to claim 1, characterized in that, The mother bag (8) has a liquid inlet (17) on its side.

10. A leak-proof mother-daughter bag for pathological specimens according to claim 1, characterized in that, Easy-tear openings (18) are provided on both sides of the bag opening (7).

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