Anti-pollution double-channel specimen transfer tube
By using a double-layer cavity structure and a one-way duckbill valve, the problem of insufficient contact of fixative during specimen transfer was solved, thus achieving aseptic transfer of specimens and accuracy of test data.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAN FIRST HOSPITAL
- Filing Date
- 2025-07-21
- Publication Date
- 2026-06-23
AI Technical Summary
During the transfer of existing specimens, insufficient contact between the fixative and the specimen tissue can easily lead to local exposure, resulting in external contamination and affecting the accuracy of the test data.
The specimen transfer tube is designed to prevent contamination. Through the double-layer cavity structure formed by the outer shell and the specimen chamber, combined with the hose compression and one-way duckbill valve, the fixative is transported in a directional manner, avoiding backflow and cross-contamination.
Ensure that the specimen remains in a clean, fixed environment throughout the transfer process to prevent contamination and improve the accuracy of test data and ease of operation.
Smart Images
Figure CN224388830U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical supplies technology, specifically to a contamination-proof dual-channel specimen transfer tube. Background Technology
[0002] In the fields of clinical medicine, pathological diagnosis, and biomedical research, the collection, transfer, and preservation of specimens are crucial steps in ensuring the accuracy of subsequent test results. Specifically, whether tissue specimens can achieve sufficient contact with the fixative and avoid external contamination during the transfer from the collection site to the laboratory directly affects the reliability of pathological analysis and the scientific validity of diagnostic conclusions.
[0003] When transferring existing specimens, due to differences in specimen volume and the difficulty in precisely controlling the amount of fixative added, insufficient contact between the fixative and the specimen tissue can easily occur, leading to local exposure. This makes the specimens susceptible to external contamination and affects the accuracy of subsequent test data. Utility Model Content
[0004] This invention addresses the technical problems existing in the prior art by providing a contamination-proof dual-channel specimen transfer tube. It solves the problem that insufficient contact between the fixative and the specimen tissue in the prior art leads to local exposure, making it susceptible to external contamination and affecting the accuracy of subsequent test data.
[0005] To achieve the above objectives, this utility model provides a contamination-proof dual-channel specimen transfer tube, including an outer shell, a lower shell at the bottom of the outer shell, a flexible tube fixedly connected between the outer shell and the lower shell, a specimen chamber fixedly connected inside the outer shell, an inlet pipe fixedly connected to the bottom of the specimen chamber, and a one-way duckbill valve fixedly connected to the inner side of the inlet pipe. By squeezing the flexible tube, the fixative stored in the cavity between the outer shell and the specimen chamber is unidirectionally introduced into the internal cavity of the specimen chamber through the inlet pipe and the one-way duckbill valve, completely immersing the internal tissue of the specimen chamber.
[0006] The beneficial effects of this utility model are:
[0007] 1. When adding fixative to the specimen chamber, the fixative is directionally delivered from the storage cavity between the outer shell and the specimen chamber to the specimen chamber by squeezing the tubing, which solves the problems of cumbersome fixative addition and incomplete tissue immersion in traditional single-lumen tubes.
[0008] 2. When transferring specimens, the one-way duckbill valve inside the inlet tube can strictly restrict the one-way flow of the fixative, avoid backflow, prevent cross-contamination between the liquid inside the specimen chamber and the outer fixative, and ensure that the specimen is always in a clean fixation environment.
[0009] Based on the above technical solution, the present invention can be further improved as follows.
[0010] Preferably, an injection tube is fixedly connected to the upper end of one side of the outer casing, and a first sealing cap is threaded to one end of the injection tube on the outside.
[0011] The advantage of adopting the above-mentioned further solution is that the fixative filling operation can be completed before the specimen is placed, reducing the risk of contamination from multiple openings of the cap after the specimen is placed.
[0012] Preferably, a protruding plate is fixedly connected to the lower end of the outer side of the outer shell and the upper end of the outer side of the lower shell. A limiting ring is provided between the two protruding plates. A spring is symmetrically provided between one side of the limiting ring and the top of the protruding plate on the outer side of the lower shell. A guide rod is symmetrically fixedly connected between the two protruding plates. The limiting ring slides on the outside of the guide rod.
[0013] The beneficial effect of adopting the above-mentioned further solution is that by limiting the position of the limiting ring, the limiting ring can protect the hose and prevent excessive squeezing of the hose from causing excessive injection of fixative fluid.
[0014] Preferably, a scale line is provided on one side of the specimen chamber, and a permeable membrane is fixedly connected to the upper end of the inner side of the liquid inlet pipe.
[0015] The advantages of adopting the above-mentioned further solution are that the scale lines make it easy to determine whether the fixative has completely submerged the tissue, allowing for timely adjustment of the injection volume. The permeable membrane effectively prevents tissue debris from entering the inlet pipe and the one-way duckbill valve channel, preventing channel blockage. At the same time, it avoids debris contamination of the outer layer of stored fixative, ensuring the cleanliness and smooth flow of the fixative.
[0016] Preferably, a second sealing cover is provided on the top of the outer shell and the specimen compartment. The inner side of the second sealing cover is threaded to the upper end of the outer side of the outer shell. A retaining ring is fixedly connected to one side of the bottom of the second sealing cover. The retaining ring is engaged with the retaining groove formed between the outer shell and the specimen compartment.
[0017] The beneficial effect of adopting the above-mentioned further solution is that it can effectively block external dust, microorganisms and other contaminants from entering the tube, and prevent liquid leakage from the tube, thus providing a comprehensive sterile protection barrier for the specimen.
[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0019] The double-layered cavity structure formed by the outer shell and the specimen chamber, combined with the bottom hose compression function, enables directional delivery of fixative from the storage cavity between the outer shell and the specimen chamber to the specimen chamber. This solves the problems of cumbersome fixative addition and incomplete tissue immersion associated with traditional single-cavity tube fixatives. The one-way duckbill valve strictly restricts the unidirectional flow of fixative, preventing backflow and cross-contamination between the liquid inside the specimen chamber and the outer fixative, ensuring that the specimen is always in a clean fixation environment. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the isometric structure of one side of this utility model;
[0021] Figure 2 This is a schematic diagram of the internal structure of this utility model;
[0022] Figure 3 This is a schematic diagram of the planar structure of the present invention in its transfer state;
[0023] Figure 4 This is a schematic diagram of the planar structure of the present invention when the hose needs to be squeezed.
[0024] The meanings of the labels in the diagram are as follows:
[0025] 1. Outer shell; 11. Lower shell; 12. Hoses; 13. Injection tube; 14. First sealing cap; 15. Protruding plate;
[0026] 2. Specimen chamber; 21. Graduation marks; 22. Liquid inlet pipe; 23. One-way duckbill valve; 24. Permeable membrane;
[0027] 3. Limiting ring; 31. Guide rod; 32. Spring;
[0028] 4. Second sealing cover; 41. Snap ring; 42. Snap groove. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0030] Please see Figures 1-4As shown, this embodiment provides a contamination-proof dual-channel specimen transfer tube, including an outer shell 1. Considering that existing specimens, due to varying specimen volumes and the difficulty in precisely controlling the amount of fixative added, may not have sufficient contact between the fixative and the specimen tissue during transfer, leading to localized exposure and susceptibility to external contamination, thus affecting the accuracy of subsequent test data, a lower shell 11 is provided at the bottom of the outer shell 1. A flexible tube 12 is fixedly connected between the outer shell 1 and the lower shell 11. A specimen chamber 2 is fixedly connected inside the outer shell 1. An inlet pipe 22 is fixedly connected to the bottom of the specimen chamber 2. A one-way duckbill valve 23 is fixedly connected to the inside of the inlet pipe 22. By squeezing the flexible tube 12, the fixative stored in the cavity between the outer shell 1 and the specimen chamber 2 is unidirectionally introduced into the internal cavity of the specimen chamber 2 through the inlet pipe 22 and the one-way duckbill valve 23, completely immersing the internal tissue of the specimen chamber 2.
[0031] In summary, the improvements in this embodiment are as follows:
[0032] The double-layered cavity structure formed by the outer shell 1 and the specimen chamber 2, combined with the squeezing function of the bottom hose 12, enables the directional delivery of fixative from the storage cavity between the outer shell 1 and the specimen chamber 2 into the specimen chamber 2. This solves the problems of cumbersome fixative addition and incomplete tissue immersion in traditional single-cavity tubes. The one-way duckbill valve 23 strictly restricts the unidirectional flow of fixative, preventing backflow and cross-contamination between the liquid inside the specimen chamber 2 and the outer fixative, ensuring that the specimen is always in a clean fixation environment.
[0033] Specifically,
[0034] In order to ensure the structural integrity of the transfer tube and to facilitate the addition of fixative by personnel, an injection tube 13 is fixedly connected to the upper end of one side of the outer shell 1, and a first sealing cap 14 is threaded to one end of the injection tube 13.
[0035] The injection tube 13 provides an independent channel for pre-filling the fixative. Combined with the threaded seal of the first sealing cap 14, the fixative filling operation can be completed before specimen placement, reducing the risk of contamination from repeated opening of the cap after specimen placement. The first sealing cap 14 effectively isolates the fixative from external air, ensuring that it does not leak or deteriorate during storage, thus improving the convenience and safety of the operation.
[0036] To prevent personnel from accidentally squeezing the hose 12 during the transfer process, which could cause excessive injection of fixative into the specimen chamber 2, protrusions 15 are fixedly connected to the lower end of the outer shell 1 and the upper end of the outer shell 11. A limiting ring 3 is provided between the two protrusions 15. A spring 32 is symmetrically provided between one side of the limiting ring 3 and the top of the protrusion 15 on the outer side of the lower shell 11. A guide rod 31 is symmetrically fixedly connected between the two protrusions 15. The limiting ring 3 slides on the outside of the guide rod 31.
[0037] The limiting ring 3 and spring 32 between the two protruding plates 15 provide a precise limiting function for the hose 12. When the hose 12 needs to be squeezed to slowly permeate the fixative stored between the outer shell 1 and the specimen chamber 2 from the inlet pipe 22 into the specimen chamber 2, the limiting ring 3 is manually slid downward. At this time, the spring 32 is squeezed and contracted, exposing the hose 12 to the external environment. Then, the hose 12 is squeezed to compress the space between the outer shell 1 and the specimen chamber 2, and the fixative is injected into the specimen chamber 2 through the inlet pipe 22 and the one-way duckbill valve 23. After confirming that the specimen is completely immersed in the fixative, the movement of the limiting ring 3 is released. Through the elastic reset action of the spring 32, the limiting ring 3 is pushed upward to fix its position. The limiting ring 3 then protects the hose 12 again to prevent excessive squeezing of the hose 12 from causing excessive injection of fixative. During the process, the spring 32 limits the movement direction of the limiting ring 3, ensuring the integrity of the structural connection while improving the accuracy of the position movement of the limiting ring 3 and improving the smoothness of manual operation.
[0038] To facilitate operators' direct observation of specimen volume and fixative level, a scale line 21 is provided on one side of specimen chamber 2;
[0039] The scale line 21 makes it easy to determine whether the fixative has completely submerged the tissue, allowing for timely adjustment of the injection volume, ensuring that the specimen fixation effect meets the testing requirements, and reducing operational errors caused by inconvenient observation.
[0040] To prevent specimen tissue debris from entering the inlet tube 22 and causing blockage, thus affecting the normal use of the transfer tube, a permeable membrane 24 is fixedly connected to the upper end of the inner side of the inlet tube 22.
[0041] The permeable membrane 24 inside the inlet pipe 22 can filter the fixative entering the specimen chamber 2 and effectively block tissue debris from entering the inlet pipe 22 and the one-way duckbill valve 23 channel, preventing channel blockage and avoiding debris contamination of the outer layer of stored fixative, thus ensuring the cleanliness and smooth flow of the fixative.
[0042] In order to effectively improve the sealing of the transfer tube and reduce the influence of the external environment on the specimen tissue, a second sealing cover 4 is provided on the top of the outer shell 1 and the specimen chamber 2. The inner side of the second sealing cover 4 is threaded to the upper end of the outer side of the outer shell 1. A retaining ring 41 is fixedly connected to one side of the bottom of the second sealing cover 4. The retaining ring 41 is engaged with the retaining groove 42 formed between the outer shell 1 and the specimen chamber 2.
[0043] The second sealing cap 4 is fixed to the outer shell 1 by a threaded connection. The engagement of the bottom retaining ring 41 and the retaining groove 42 forms a double sealing structure, which greatly improves the sealing performance of the top opening. It can effectively block external dust, microorganisms and other contaminants from entering the tube, and prevent liquid leakage from the tube, providing a comprehensive sterile protection barrier for the specimen.
[0044] In summary, the working principle of this solution is as follows:
[0045] This anti-contamination dual-channel specimen transfer tube achieves safe specimen transfer through the synergistic effect of its independent double-layer cavity design and unidirectional control structure. In use, firstly, fixative is added to the outer cavity between the outer shell 1 and the specimen compartment 2 via the injection tube 13 on one side of the outer shell 1. After addition, the first sealing cap 14 is tightened to achieve sealed storage and prevent premature contamination. Then, the top second sealing cap 4 is opened, and the specimen is placed into the inner specimen compartment 2. When the second sealing cap 4 is tightened, it is fixed to the outer shell 1 via a threaded connection. At this time, the bottom retaining ring 41 and the retaining groove 42 engage to form a double seal, isolating external contamination.
[0046] The operator observes the specimen volume through the scale line 21 on the specimen chamber 2, then manually slides the limiting ring 3 downwards, compressing the spring 32 to contract it and expose the tubing 12. When the tubing 12 is squeezed, the pressure in the outer cavity increases, and the fixative is delivered through the inlet pipe 22 at the bottom of the specimen chamber 2. It is then delivered unidirectionally above the inlet pipe 22 via the one-way duckbill valve 23, and then filtered by the permeation membrane 24 before entering the specimen chamber 2, ensuring that the fixative flows in a directional manner and without backflow.
[0047] After confirming the specimen is completely submerged, release the limiting ring 3. The spring 32 elastically resets, pushing the limiting ring 3 upwards to its original position. Re-wrap the tubing 12 to prevent excessive compression later. During the transfer, the one-way duckbill valve 23 blocks reverse flow, preventing cross-contamination between the liquid inside the specimen chamber 2 and the outer fixative. The permeable membrane 24 prevents tissue debris from entering the inlet pipe 22 and causing blockage, ensuring smooth flow of the fixative. Throughout the process, aseptic transfer and thorough fixation of the specimen are achieved through double sealing, one-way control, and precise limiting.
[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A contamination-resistant dual-channel specimen transfer tube, comprising an outer shell (1), characterized in that: The outer shell (1) is provided with a lower shell (11) at the bottom. A hose (12) is fixedly connected between the outer shell (1) and the lower shell (11). A specimen chamber (2) is fixedly connected inside the outer shell (1). An inlet pipe (22) is fixedly connected to the bottom of the specimen chamber (2). A one-way duckbill valve (23) is fixedly connected to the inside of the inlet pipe (22). By squeezing the hose (12), the fixative stored in the cavity between the outer shell (1) and the specimen chamber (2) is unidirectionally introduced into the internal cavity of the specimen chamber (2) from the inlet pipe (22) and the one-way duckbill valve (23), completely immersing the internal tissue of the specimen chamber (2).
2. The anti-contamination dual-channel specimen transfer tube according to claim 1, characterized in that: The upper end of one side of the outer shell (1) is fixedly connected to an injection tube (13), and the outer end of the injection tube (13) is threadedly connected to a first sealing cap (14).
3. The anti-contamination dual-channel specimen transfer tube according to claim 1, characterized in that: The lower end of the outer shell (1) and the upper end of the outer shell (11) are both fixedly connected with protruding plates (15). A limiting ring (3) is provided between the two protruding plates (15). A spring (32) is symmetrically provided between one side of the limiting ring (3) and the top of the protruding plate (15) on the outer side of the lower shell (11).
4. The anti-contamination dual-channel specimen transfer tube according to claim 3, characterized in that: A guide rod (31) is symmetrically fixed between the two protruding plates (15), and the limiting ring (3) slides on the outside of the guide rod (31).
5. The anti-contamination dual-channel specimen transfer tube according to claim 1, characterized in that: The specimen chamber (2) has a scale line (21) on one side.
6. The anti-contamination dual-channel specimen transfer tube according to claim 1, characterized in that: The upper end of the inner side of the inlet pipe (22) is fixedly connected to a permeable membrane (24).
7. The anti-contamination dual-channel specimen transfer tube according to claim 1, characterized in that: The outer shell (1) and the specimen compartment (2) are provided with a second sealing cover (4) at the top. The inner side of the second sealing cover (4) is threaded to the upper end of the outer side of the outer shell (1). A retaining ring (41) is fixedly connected to one side of the bottom of the second sealing cover (4). The retaining ring (41) is engaged with the retaining groove (42) formed between the outer shell (1) and the specimen compartment (2).