Pre-filled catheter sealing device

Abstract

A pre-filled catheter sealing device comprises a first liquid storage device, a second liquid storage device and an auxiliary injection device, the first liquid storage device is provided with an injection tube and a first containing bag, the second liquid storage device is provided with a second containing bag, and the auxiliary injection device is provided with a limiting part, a containing part and a pushing part. The injection tube is provided with an abutting part matched with the limiting part to achieve the limiting function, the containing part is provided with a containing cavity capable of containing the first liquid storage device and the second liquid storage device, and the pushing part can push the first containing bag or the second containing bag to achieve tube washing or tube sealing. The injection tube is matched with the catheter and can be in butt joint with the catheter to convey liquid in the first containing bag to the catheter, the auxiliary injection device does not make contact with the liquid and can be disinfected and used repeatedly, and the first liquid storage device and the second liquid storage device are disposable, so that disposable materials can be reduced, and the device is more environmentally friendly and economical. The first liquid storage device and the second liquid storage device can be matched with different liquids for use, so that two liquids can be injected at one time, and convenience and rapidness are realized.

Description

Technical Field

[0001] The present invention belongs to the field of medical devices, and particularly relates to a pre-filled catheter sealing device. Background Art

[0002] During hemodialysis, the blood in the catheter is extremely prone to coagulation. Therefore, after each dialysis session, catheter sealing is required to ensure the patency of the catheter for subsequent treatment. Currently, anticoagulant sealing solutions usually use heparin or citric acid solution, which need to be manually perfused by medical staff using a syringe. This process is not only time-consuming but also prone to inaccurate liquid dosage due to improper operation, increasing the risk of thrombosis and even potentially causing catheter blockage. In addition, manual operation poses a potential risk of infection, increasing patient discomfort and the medical burden. Therefore, it is particularly important to develop a convenient, accurate, and safe catheter sealing device, especially during pulsatile catheter sealing, which should not cause liquid backflow. To ensure environmental protection, as few disposable devices or components of disposable devices as possible should be used.

[0003] Chinese Patent No. CN102836473B with the patent name of single-cylinder pre-filled flushing and catheter sealing device discloses a single-cylinder pre-filled flushing and catheter sealing device. Although this design is simple to operate, during the catheter sealing stage, if pulsatile catheter sealing is used, it will cause blood reflux because the liquid storage device has a certain elasticity and will rebound after being irregularly compressed, and the greater the compression, the more obvious the rebound. If pulsatile catheter sealing is not used, the catheter sealing effect is poor.

[0004] Chinese Patent No. CN211485991U with the patent name of a pre-filled catheter sealing device discloses a pre-filled catheter sealing device that only has one liquid storage space and cannot complete flushing or catheter sealing, and needs to replace or use a three-way joint to complete two actions. Summary of the Invention

[0005] Aiming at the above-mentioned prior art, the object of the present invention is a pre-filled catheter sealing device that prevents backflow.

[0006] The technical solution of the present invention is realized as follows: A pre-filled catheter sealing device includes a first liquid storage device, a second liquid storage device, and an auxiliary injection device. The first liquid storage device is provided with an injection tube and a first accommodating bag. The second liquid storage device is provided with a second accommodating bag. The auxiliary injection device is provided with a limiting part, a accommodating part, and a pushing part. The injection tube is provided with an abutting part that matches the limiting part to achieve a limiting function. The accommodating part is provided with an accommodating cavity that can accommodate the first liquid storage device and the second liquid storage device. The pushing part can push the first accommodating bag or the second accommodating bag to achieve flushing or catheter sealing.

[0007] The beneficial effects of this design are: the injection tube and the catheter are matched and can be docked with the catheter to transport the liquid in the first holding bag to the catheter. The auxiliary injection device does not contact the liquid and can be sterilized and used multiple times. The first liquid storage device and the second liquid storage device are disposable. This can reduce disposable materials, reduce carbon emissions, reduce medical waste, and be more environmentally friendly and economical. The first liquid storage device and the second liquid storage device can also be used with different liquids to achieve one-time injection of two liquids, which is convenient and quick.

[0008] Furthermore, a rubber coating layer is provided on the outside of the second containing bag. The rubber coating layer is cylindrical and the inner wall is provided with adhesive so that the outer wall of the second containing bag is adhered to the inner wall of the rubber coating layer. The second containing bag is made of flexible material and can be folded inward. In this way, when the second containing bag is pushed for injection, the injection speed is more stable, the second containing bag will not wrinkle, and its volume change is more linear, and it is not easily affected by the volume change of the second containing bag.

[0009] Furthermore, the abutment portion is provided with a convex ring that forms an annular groove with the front end of the second receiving bag and the injection tube. The annular groove and the limiting portion are engaged to achieve limitation, which makes it easier to fix the injection tube and more stable when inserting the injection tube into the catheter docking position.

[0010] Furthermore, a puncture tube is provided at the rear end of the injection tube, and the puncture tube is provided with a sharp tip capable of puncturing the second receiving bag, so that the liquid injection of the second receiving bag can continue after the injection of the first receiving bag.

[0011] Furthermore, a guide hole is provided on the side wall of the puncture tube, so that the liquid in the first containing bag can be squeezed out completely from the first containing bag.

[0012] Furthermore, the second liquid storage device is provided with a sealing ring, which is located at the front end of the second holding bag. The sealing ring is provided with a sealing hole. The sealing hole matches the size of the puncture tube and after the puncture tube is inserted into the sealing hole, the sealing ring and the puncture tube are sealed and connected, thereby preventing leakage and contamination of the liquid when injecting the liquid in the second holding bag.

[0013] Furthermore, the auxiliary injection device includes a left barrel, a right barrel and a fixing ring. The left barrel and the right barrel adopt the same semi-cylindrical design so that the left barrel and the right barrel are combined to form a complete cylinder. The fixing ring is arranged on the outer periphery of the left barrel and the right barrel to fix the left barrel and the right barrel, which facilitates the installation and disassembly of the auxiliary injection device.

[0014] Furthermore, the pushing portion is provided with a push handle, the front end of the push handle is provided with an end face that abuts against the rear end of the second containing bag, and a stepped groove is provided on the side of the push handle, so that the distance pushed by the push handle can be controlled by the stepped groove. Especially when pulse sealing the tube, it is necessary to continuously stop the injection and then re-inject. It is difficult for humans to grasp the injection volume each time. After setting the stepped groove, it is necessary to push a certain distance and then rotate the push handle before continuing to push. In this way, the amount of each push can be accurately grasped, and pulse flushing or sealing can be accurately achieved.

[0015] Further, support tubes are provided inside the left and right tube bodies. The outer side surfaces of the support tubes are in contact with the left and right tube bodies, and the inner side surfaces of the support tubes are in contact with the side surfaces of the push handles. Guide pins are provided on the inner side surfaces of the support tubes, and the guide pins are located in the stepped grooves to limit the movement or rotation of the push handles relative to the support tubes.

[0016] Further, a convex cavity is provided at the rear end of the first accommodation bag. The outer wall of the convex cavity matches the size of the sealing hole and can be inserted into the sealing hole, so that the second accommodation bag and the first accommodation bag are tightly connected, leaving a space for the puncture tube and making it easier to drain the liquid in the first accommodation bag. Description of the Drawings

[0017] Figure 1 is a three-dimensional assembly schematic diagram of a pre-filled catheter sealing device according to the present invention;

[0018] Figure 2 is an exploded schematic diagram of a pre-filled catheter sealing device according to the present invention;

[0019] Figure 3 is a sectional schematic diagram of the state of a pre-filled catheter sealing device according to the present invention after being compressed after being separated from the main rail;

[0020] Figure 4 is a sectional schematic diagram before injection of a pre-filled catheter sealing device according to the present invention;

[0021] Figure 5 is a sectional schematic diagram of a pre-filled catheter sealing device according to the present invention with the first accommodation bag completed injection;

[0022] Figure 6 is a sectional schematic diagram of a pre-filled catheter sealing device according to the present invention with the second accommodation bag completed injection. Detailed Embodiments

[0023] As needed, detailed embodiments of the present invention are disclosed herein, but it should be understood that the disclosed embodiments are only illustrative of the present invention, and the present invention can be implemented in different and alternative forms. The drawings are not necessarily drawn to scale, and some features may be exaggerated or reduced to show details of specific components. Therefore, the specific structures and functional details disclosed herein should not be construed as having a limiting meaning, but only as a representative basis for teaching those skilled in the art to adopt the present invention differently. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0024] Such as Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown in the figure, a pre-filled catheter sealing device includes a first liquid storage device 1, a second liquid storage device 2, and an auxiliary injection device 3. The first liquid storage device 1 is provided with an injection tube 11 and a first accommodation bag 12. The second liquid storage device 2 is provided with a second accommodation bag 21. The auxiliary injection device 3 is provided with a limiting part 4, an accommodation part 5, and a pushing part 6. The injection tube 11 is provided with an abutting part 17 that matches the limiting part 4 to achieve the limiting function. The accommodation part 5 is provided with an accommodation cavity that can accommodate the first liquid storage device 1 and the second liquid storage device 2. The pushing part 6 can push the first accommodation bag 12 or the second accommodation bag 21 to achieve flushing or sealing the catheter. The first liquid storage device 1 and the second liquid storage device 2 are made of PC material and can be used disposable.

[0025] As Figures 1-6 shown, an adhesive layer 15 is provided outside the second accommodation bag 21. The adhesive layer 15 is cylindrical and its inner wall is provided with an adhesive so that the outer wall of the second accommodation bag 21 is adhered to the inner wall of the adhesive layer 15. The second accommodation bag 21 is made of a flexible material and can be turned inward. The first accommodation bag 12 can also adopt the same design as the second accommodation bag 21, that is, an adhesive layer 15 is provided. The adhesive layer 15 is made of a harder material or has a larger thickness and has a certain supporting ability, so that wrinkles are not easily generated, and the smoothness of injection is ensured while saving materials. The injection tube 11 provided at the front end of the first accommodation bag 12 can form an integral structure with the first accommodation bag 12 by using a hot melt technology. After the first accommodation bag 12 is filled with liquid, it can be sealed with a film. The first accommodation bag 12 can be filled with normal saline, glucose injection, or sodium lactate solution. The second accommodation bag 21 is filled with heparin saline or 4% citric acid solution. Of course, other liquids can also be pre-filled if necessary. The first accommodation bag 12 can be designed as a square cubic structure or a circular cylindrical structure.

[0026] In an embodiment, the abutting part 17 is provided with a convex ring to form an annular groove 18 with the front end of the second accommodation bag 21 and the injection tube 11. The annular groove 18 is inserted into the limiting part 4 to achieve limiting.

[0027] In an embodiment, a puncture tube 13 is provided at the rear end of the injection tube 11. The puncture tube 13 is provided with a sharp tip that can pierce the second accommodation bag 21. The tip is designed in the shape of a blade, a sawtooth, a needle tip, etc., which is easier to pierce the bottom of the first accommodation bag 12 and the front end of the second accommodation bag 21.

[0028] In an embodiment, a diversion hole 14 is provided on the side wall of the puncture tube 13. The diversion hole 14 can be square, circular, etc.

[0029] In one embodiment, the second liquid storage device 2 is provided with a sealing ring 22. The sealing ring 22 is located at the front end of the second accommodation bag 21. The sealing ring 22 is provided with a sealing hole 23. The sealing hole 23 is sized to match the puncture tube 13. After the puncture tube 13 is inserted into the sealing hole 23, the sealing ring 22 and the puncture tube 13 are hermetically connected. The sealing ring 22 is made of materials such as rubber and has good sealing performance.

[0030] In one embodiment, the auxiliary injection device 3 includes a left tube 31 in the shape of a semi-cylinder, a right tube 32 in the shape of a semi-cylinder, and a fixing ring 33. The left tube 31 and the right tube 32 are made of stainless steel. The fixing ring 33 is made of materials such as PV, PC, or PE. The left tube 31 and the right tube 32 adopt the same semi-cylinder design, so that the left tube 31 and the right tube 32 are combined to form a complete cylinder. The fixing ring 33 is arranged on the outer periphery of the left tube 31 and the right tube 32 to fix the left tube 31 and the right tube 32.

[0031] In one embodiment, the pushing part 6 is provided with a push handle 35. The front end of the push handle 35 is provided with an end face that abuts against the rear end of the second accommodation bag 21. A stepped groove 36 is provided on the side of the push handle 35. The push handle 35 is equivalent to the piston of a syringe, but in this application, there is no need to set a piston structure, which can reduce costs. It is only necessary that the end face of the push handle 35 matches the second accommodation bag 21.

[0032] In one embodiment, a support tube 35 is provided inside the left tube 31 and the right tube 32 and is fixed by threads or a card slot. The outer side face of the support tube 35 abuts against the left tube 31 and the right tube 32. The inner side face of the support tube 35 abuts against the side face of the push handle 35. A guide pin 39 is provided on the inner side face of the support tube 35. The guide pin 39 is located in the stepped groove 36 to limit the movement or rotation of the push handle 35 relative to the support tube 35. The support tube 35 can also be set to be in two halves and integrally formed with the left tube 31 and the right tube 32. The stepped groove 36 is divided into a straight groove 37 and a multi-stepped groove 38. When the guide pin 39 is in the straight groove 37, direct injection can be performed. When the guide pin 39 is in the multi-stepped groove 38, pulsed injection is performed. The straight groove 37 extends axially. The multi-stepped groove 38 extends axially and then circumferentially and then axially again, forming multiple stepped structures in this way.

[0033] In one embodiment, a convex cavity 16 is provided at the rear end of the first accommodation bag 12. The outer wall of the convex cavity 16 is sized to match the sealing hole 23 and can be inserted into the sealing hole 23.

[0034] As Figure 4 shown, before injection, both the first accommodation bag 12 and the second accommodation bag 21 store liquid. As Figure 5 shown, the liquid in the first accommodation bag 12 is extruded, and the second accommodation bag 21 is in a complete state. By further pushing the push handle 35, the second accommodation bag 21 can be punctured. As Figure 6 shown, the second accommodation bag 21 is punctured, all the liquid is extruded, and the tube is sealed in a pulsating manner.

Claims

1. A pre-filled catheter sealing device, characterized in that: It includes a first liquid storage device (1), a second liquid storage device (2) and an auxiliary injection device (3). The first liquid storage device (1) is provided with an injection tube (11) and a first accommodation bag (12). The second liquid storage device (2) is provided with a second accommodation bag (21). The auxiliary injection device (3) is provided with a limiting part (4), an accommodation part (5) and a pushing part (6). The injection tube (11) is provided with an abutting part (17) that matches with the limiting part (4) to realize the limiting function. The accommodation part (5) is provided with an accommodation cavity that can accommodate the first liquid storage device (1) and the second liquid storage device (2). The pushing part (6) can push the first accommodation bag (12) or the second accommodation bag (21) to realize flushing or sealing the tube.

2. The pre-filled catheter sealing device according to claim 1, characterized in that: An encapsulating layer (15) is provided outside the second accommodation bag (21). The encapsulating layer (15) is cylindrical and its inner wall is provided with adhesive so that the outer wall of the second accommodation bag (21) is adhered to the inner wall of the encapsulating layer (15). The second accommodation bag (21) is made of a flexible material and can be folded inward.

3. The pre-filled catheter sealing device according to claim 2, wherein: The abutting part (17) is provided with a convex ring, which forms an annular groove (18) with the front end of the second accommodation bag (21) and the injection tube (11). The annular groove (18) is inserted into the limiting part (4) to realize the limiting function.

4. The prefilled catheter sealing device according to claim 3, characterized in that: A puncture tube (13) is provided at the rear end of the injection tube (11). The puncture tube (13) is provided with a sharp tip that can pierce the second accommodation bag (21).

5. The pre-filled catheter sealing device according to claim 4, characterized in that: The side wall of the puncture tube (13) is provided with a diversion hole (14).

6. The prefilled catheter sealing device according to claim 5, characterized in that: The second liquid storage device (2) is provided with a sealing ring (22). The sealing ring (22) is located at the front end of the second accommodation bag (21). The sealing ring (22) is provided with a sealing hole (23). The sealing hole (23) matches the size of the puncture tube (13). After the puncture tube (13) is inserted into the sealing hole (23), the sealing ring (22) is hermetically connected to the puncture tube (13).

7. The pre-filled catheter sealing device according to claim 6, characterized in that: A convex cavity (16) is provided at the rear end of the first accommodation bag (12). The outer wall of the convex cavity (16) matches the size of the sealing hole (23) and can be inserted into the sealing hole (23).

8. The pre-filled catheter sealing device according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7, characterized in that: The auxiliary injection device (3) includes a left tube (31), a right tube (32) and a fixing ring (33). The left tube (31) and the right tube (32) adopt the same semi-cylindrical design so that the left tube (31) and the right tube (32) are combined to form a complete cylinder. The fixing ring (33) is arranged on the outer periphery of the left tube (31) and the right tube (32) to fix the left tube (31) and the right tube (32).

9. The pre-filled catheter sealing device according to claim 8, characterized in that: The pushing part (6) is provided with a push handle (35). The front end of the push handle (35) is provided with an end face that abuts against the rear end of the second accommodation bag (21). A stepped groove (36) is provided on the side face of the push handle (35).

10. The pre-filled catheter sealing device according to claim 9, characterized in that: A support tube (35) is provided inside the left tube (31) and the right tube (32). The outer side surface of the support tube (35) abuts against the left tube (31) and the right tube (32), and the inner side surface of the support tube (35) abuts against the side surface of the push handle (35). A guide pin (39) is provided on the inner side surface of the support tube (35), and the guide pin (39) is located in the stepped groove (36) to restrict the movement or rotation of the push handle (35) relative to the support tube (35).

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