A sampler for hemodialysis

Abstract

This utility model belongs to the field of sampling technology, and in particular to a sampler for hemodialysis. It includes a sampling cylinder with ear plates on both sides of the top, a cylindrical sampling chamber inside, and a connector at the bottom communicating with the sampling chamber. A piston head is located inside the sampling chamber, with a push rod connected to the upper part of the piston head and a push plate at the top of the push rod. A sampling needle is connected to the end of the connector, and a needle sleeve is provided at the sampling needle. The needle sleeve has a receiving cavity inside that can accommodate the sampling needle. The needle sleeve is cut in half. This invention only requires aligning the opening of the needle sleeve with the lower part of the sampling cylinder from one side, and then covering the lower end of the sampling cylinder with the needle sleeve to complete the fitting of the lower end of the sampling cylinder and the sampling needle. It eliminates the need to align the opening of the needle sleeve directly with the needle tip, reducing the risk of the needle tip hitting the operator's hand. Furthermore, because the needle sleeve is split in half, the interior can be easily disinfected, allowing for reuse and reducing costs.

Description

Technical Field

[0001] This utility model relates to the field of sampling technology, and in particular to a sampler for hemodialysis. Background Technology

[0002] The kidneys are vital organs in the human body. Their basic function is to produce urine to remove metabolic waste products, certain toxins, and other harmful substances from the body, while retaining water and other useful substances through reabsorption. If the kidneys develop serious disease, affecting their normal detoxification ability and causing abnormal levels of urea nitrogen and creatinine in the blood, dialysis treatment becomes necessary.

[0003] CN202021092402.6 discloses a hemodialysis sampler for nephrology, which achieves the purpose of shielding the fixed needle tube by setting a needle tube sleeve on the outside of the fixed needle tube, thereby avoiding the phenomenon of the fixed needle tube scratching medical staff.

[0004] The connection between the cannula and the fixed cannula must strictly ensure that the cannula opening and the needle tip axis are aligned. In clinical practice, the hemodialysis environment is complex (such as insufficient light and limited operating space), and visual judgment is prone to deviation, which increases operation time and affects sampling efficiency. Especially in emergency treatment scenarios, it may delay diagnosis and treatment. When operating manually, the needle tip may deviate laterally due to hand tremors or uneven force. If the needle tip is directly on the hand, it may cause scratches. Utility Model Content

[0005] This invention provides a sampler for hemodialysis, which solves the technical problem in the prior art that the needle tip may cause scratches to the hand when the needle tube is sheathed.

[0006] This utility model provides the following technical solution:

[0007] A sampler for hemodialysis includes a sampling cylinder with ear plates on both sides of the top and a cylindrical sampling chamber inside. A connector communicating with the sampling chamber is connected to the bottom. A piston head is provided inside the sampling chamber, and a push rod is connected to the upper part of the piston head. A push plate is provided on the top of the push rod. A sampling needle is connected to the end of the connector. A needle sleeve is provided at the sampling needle. The needle sleeve has a receiving cavity inside that can accommodate the sampling needle. The needle sleeve is cut in half, with one side connected by a flexible member and the other side provided with a coupling member, so that the needle sleeve can cover the sampling needle from the side.

[0008] In one possible implementation, the upper part of the needle tube sleeve is further provided with a connecting section adapted to the connector. The connecting section can be fitted onto the connector after being assembled, so that the sampling needle can be taken away together when the needle tube sleeve is separated from the sampling cylinder.

[0009] In one possible implementation, a buckle is provided on the outside of each side of the syringe sheath to facilitate one-handed operation by inserting a finger.

[0010] In one possible implementation, the upper part of the connecting section is further provided with a sampling tube covering section, which, when assembled, forms a cylindrical covering section that fits the end of the sampling tube and covers the lower end of the sampling tube.

[0011] In one possible implementation, the flexible element is a thin plastic connecting layer.

[0012] In one possible implementation, the coupling element is a snap-fit ​​or engaging groove that cooperates with each other.

[0013] In one possible implementation, the needle sleeve is integrally formed.

[0014] It should be understood that a syringe sleeve is also provided at the bottom of the sampling tube. Simply align the opening of the syringe sleeve with the bottom of the sampling tube from one side, and then cover the bottom of the sampling tube with the syringe sleeve to complete the fitting of the bottom of the sampling tube and the sampling needle. It is not necessary to align the opening of the syringe sleeve with the needle tip, thus reducing the risk of the needle tip pointing directly at the operator's hand.

[0015] Moreover, because the syringe sleeve is split in half, the inside can be easily disinfected, thus allowing for reuse and reducing costs. Attached Figure Description

[0016] Figure 1 A three-dimensional structural schematic diagram of a sampler for hemodialysis provided in an embodiment of this utility model;

[0017] Figure 2 An exploded structural diagram of a hemodialysis sampler provided in this embodiment of the present invention;

[0018] Figure 3 A schematic diagram of the needle sleeve structure of a hemodialysis sampler provided in an embodiment of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of a hemodialysis sampler with the needle sleeve covering the sampling cylinder and sampling needle, provided in an embodiment of the present invention.

[0020] Figure label:

[0021] 1. Push plate; 2. Push rod; 3. Bracing; 4. Ear plate; 5. Sampling cylinder; 6. Left sample cylinder sleeve; 7. Left buckle ring; 8. Left needle sleeve; 9. Right needle sleeve; 10. Right sample cylinder sleeve; 11. Right buckle ring; 12. Sampling chamber; 13. Sampling needle; 14. Needle tip; 15. Connector; 16. Piston head; 17. Buckle; 18. Engaging groove; 19. Right connecting section; 20. Right needle chamber; 21. Left needle chamber; 22. Right arc plate; 23. Left arc plate; 24. Left connecting section; 25. Right annular plate; 26. Left annular plate. Detailed Implementation

[0022] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0023] A hemodialysis sampler includes a sampling cylinder 5. Ear plates 4 are provided on both sides of the top of the sampling cylinder 5 for use with a push plate 1. The sampling cylinder 5 is cylindrical with a round opening at the top and a cylindrical sampling cavity 12 inside for a piston head 16 and a push rod 2 to extend into. The top of the push rod 2 is connected to the push plate 1, and the bottom of the push rod 2 is connected to the piston head 16, which extends into the sampling cavity 12. The length of the push rod 2 is longer than the length of the sampling cavity 12, so that the push plate 1 is always outside the sampling cavity 12. A connector 15 is provided at the lower end of the sampling cylinder 5. The connector 15 is cylindrical and communicates with the sampling cavity 12. The connector 15 is connected to the needle tip 14 of a sampling needle 13.

[0024] The push plate 1 is set as a circular plate or an elliptical plate, and the upper side of the push plate 1 is provided with anti-slip strips 3.

[0025] The lower part of the sampling cylinder 5 is also equipped with a syringe sleeve. Simply align the opening of the syringe sleeve with the lower part of the sampling cylinder 5 from one side, and then cover the lower end of the sampling cylinder 5 with the syringe sleeve to complete the fitting of the lower end of the sampling cylinder 5 and the sampling needle 13. It is not necessary to align the opening of the syringe sleeve with the needle tip, thus reducing the risk of the needle tip pointing directly at the operator's hand.

[0026] The needle sleeve includes a left arc-shaped plate 23 and a right arc-shaped plate 22 fitted under the lower part of the sampling cylinder 5. The left arc-shaped plate 23 and the right arc-shaped plate 22 are flexibly connected on one side. Specifically, in this embodiment, a thin plastic layer of the same material as the left arc-shaped plate 23 and the right arc-shaped plate 22 is used for connection. The thickness of the thin plastic layer is about 1mm, so that the connection side of the left arc-shaped plate 23 and the right arc-shaped plate 22 will not separate, and can be opened and closed through the thin plastic layer, thus achieving the opening and closing function.

[0027] On the other side, there are buckles 17 and engaging grooves 18 respectively. When the buckle is inserted into the engaging groove 18, a large force is required to separate them. Thus, the buckles 17 and engaging grooves 18 temporarily join the other side of the left arc plate 23 and the right arc plate 22 together. At this time, the left arc plate 23 and the right arc plate 22 are in a closed state. In the closed state, the left arc plate 23 and the right arc plate 22 form a ring that fits the sampling cylinder 5 and is fitted onto the sampling cylinder 5. When a large force is applied to the left arc plate 23 and the right arc plate 22 in opposite directions, the buckles 17 and engaging grooves 18 can be separated again, so that the left arc plate 23 and the right arc plate 22 return to the open state.

[0028] The bottom of the left arc-shaped plate 23 is connected to the left annular plate 26, and the bottom of the right arc-shaped plate 22 is connected to the right annular plate 25. When the left annular plate 26 and the right annular plate 25 are put together, they form a circular plate, and the size is adapted to the end of the sampling cylinder 5 and the connector 15. The connector 15 passes through the hole in the middle of the left annular plate 26 and the right annular plate 25, so that the end of the sampling cylinder 5 can be completely covered after the left arc-shaped plate 23 and the right arc-shaped plate 22, the left annular plate 26 and the right annular plate 25 are put together.

[0029] The left arc-shaped plate 23 and the left annular plate 26 form the left sample sleeve 6, which is used to cover the end of the left sampling cylinder 5. The right arc-shaped plate 22 and the right annular plate 25 form the right sample sleeve 10, which is used to cover the end of the right sampling cylinder 5. When covering the sampling needle 13, the covering difficulty is further reduced. It is only necessary to place the openings of the left sample sleeve 6 and the right sample sleeve 10 towards the bottom of the sampling cylinder 5 on one side of the sampling cylinder 5, and make the left annular plate 26 and the right annular plate 25 contact the bottom of the sampling cylinder 5. Then push them forward until the left sample sleeve 6 and the right sample sleeve 10 are in contact with the outer wall of the bottom of the sampling cylinder 5, and the covering of the sampling needle 13 can be completed.

[0030] A left connecting section 24 is provided on the lower side of the left annular plate 26, and a right connecting section 19 is provided on the lower side of the right annular plate 25. When the left connecting section 24 and the right connecting section 19 are assembled together, they are cylindrical, and the through hole in the middle is adapted to the size of the connector 15. After the left connecting section 24 and the right connecting section 19 are assembled, they are sleeved on the connector 15 and located between the end of the sampling cylinder 5 and the needle tip 14 of the sampling needle 13. On the one hand, this can make the needle sleeve stably set on the sampling cylinder 5. On the other hand, even if the needle sleeve separates from the sampling cylinder 5 when the sampling cylinder 5 falls or is subjected to external force, the sampling needle 13 can still be covered in the left needle sleeve 8 and the right needle sleeve 9.

[0031] The lower part of the left connecting section 24 is provided with a left needle sleeve 8, and the lower part of the right connecting section 19 is provided with a right needle sleeve 9. The left needle sleeve 8 is provided with a left needle cavity 21, and the right needle sleeve 9 is provided with a right needle cavity 20. Both the left needle cavity 21 and the right needle cavity 20 are semi-cylindrical cavities, and when the two are put together, they can accommodate the sampling needle 13.

[0032] After the left needle sleeve 8 and the right needle sleeve 9 are assembled, the sampling needle 13 is covered in the left needle cavity 21 and the right needle cavity 20; the length of the left connecting section 24 and the right connecting section 19 is less than the distance from the top of the needle tip 14 of the sampling needle 13 to the end of the sampling cylinder 5.

[0033] The left arc plate 23 and the right arc plate 22 are also connected to a left buckle 7 and a right buckle 11. When it is necessary to remove the needle tube sleeve, the thumb and index finger can be inserted into the left buckle 7 and the right buckle 11 respectively, so that the needle tube sleeve can be easily operated with one hand.

[0034] Moreover, because the syringe sleeve is split in half, the inside can be easily disinfected, thus allowing for reuse and reducing costs.

[0035] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. In the absence of conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A hemodialysis sampler comprising a sampling cylinder, both sides of the top of the sampling cylinder are provided with an ear plate, a cylindrical sampling cavity is arranged inside, a connecting head in communication with the sampling cavity is connected to the bottom, a piston head is arranged in the sampling cavity, a push rod is connected to the upper part of the piston head, a push plate is arranged at the top of the push rod; a sampling needle is connected to the end of the connecting head, a needle tube sleeve is arranged at the sampling needle, characterized in that, The needle sleeve has an internal cavity that can accommodate the sampling needle. The needle sleeve is cut in half, with one side connected by a flexible component and the other side having a coupling component, so that the needle sleeve can cover the sampling needle from the side.

2. The sampler for hemodialysis according to claim 1, characterized in that, The upper part of the needle tube sleeve is also provided with a connecting section adapted to the connector. After the connecting section is assembled, it can be sleeved on the connector so that the sampling needle can be taken away together when the needle tube sleeve is separated from the sampling cylinder.

3. A sampler for hemodialysis according to claim 2, characterized in that, Each side of the syringe sheath has a buckle on the outside, which makes it easy to insert a finger for one-handed operation.

4. A sampler for hemodialysis according to claim 3, characterized in that, The upper part of the connecting section is also provided with a sampling tube covering section, which, when assembled, forms a cylindrical covering section that fits the end of the sampling tube and covers the lower end of the sampling tube.

5. A sampler for hemodialysis according to claim 1, characterized in that, The flexible component is a thin plastic connecting layer.

6. A sampler for hemodialysis according to claim 5, characterized in that, The coupling element consists of interlocking buckles and engaging grooves.

7. A sampler for hemodialysis according to claim 6, characterized in that, The needle tube sleeve is integrally molded.

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