CN209827737U

CN209827737U - Needleless sampling joint for dialysis

Info

Publication number: CN209827737U
Application number: CN201920445986.1U
Authority: CN
Inventors: 李丁
Original assignee: Chengdu Xinjin Shifeng Medical Instrument Co Ltd
Current assignee: Chengdu Xinjin Shifeng Medical Instrument Co Ltd
Priority date: 2019-04-03
Filing date: 2019-04-03
Publication date: 2019-12-24
Anticipated expiration: 2029-04-03

Abstract

The utility model discloses a needleless sampling connects for dialysis, it belongs to medical equipment technical field. The utility model comprises a hollow joint body and a silica gel plug, wherein the bottom of the joint body is fixedly connected with a dialysis extracorporeal circulation pipeline, and the silica gel plug is embedded in the joint body; the silica gel plug is internally provided with a circulation pipeline for blood circulation. The circulation pipeline is further attached to an annular sleeve, a baffle plate used for preventing blood from being flushed out of the silica gel plug is fixedly connected to the bottom of the annular sleeve, and the baffle plate can completely shield the circulation pipeline when the baffle plate abuts against the bottom of the silica gel plug. The utility model has the advantages that the sampling connector is provided with the sampling channel, and the sampling can be completed by directly using the needleless injector for connection; the risk of blood leakage is avoided by arranging the annular sleeve and the baffle; an annular cavity is formed in the inner cavity of the sampling body, so that a buffer space is provided for extrusion deformation of the silica gel plug, damage to the silica gel plug is reduced, and the service life of the whole sampling joint is prolonged.

Description

Needleless sampling joint for dialysis

Technical Field

The utility model belongs to the technical field of medical equipment technique and specifically relates to a needleless sampling connects for dialysis is related to.

Background

Hemodialysis is a treatment for purifying blood in uremic patients with severe loss of renal function through a semipermeable membrane by using the principles of diffusion, convection, adsorption, and the like. Hemodialysis is to connect human body and dialysis machine through hemodialysis extracorporeal circulation pipeline, and in the dialysis machine, redundant harmful toxin, waste produced by metabolism and excessive electrolyte in patient's blood are filtered and removed, and led back to human body to form circulation, thus achieving the effect of purifying blood and balancing electrolyte in blood. The hemodialysis extracorporeal circulation pipeline is used as a blood flow pipeline instead of a blood vessel.

A maintenance hemodialysis patient needs to collect blood, replenish fluid samples, and perform tests to detect various index conditions of the blood. In the prior art, a sampling test generally comprises the steps of arranging a sampling joint on an extracorporeal circulation tube for hemodialysis, and sealing the sampling joint by using the elasticity of a silica gel plug through compressing the silica gel plug. During the sampling, pierce the silica gel stopper through the syringe needle and sample, utilize the elasticity of silica gel stopper, when the syringe needle pierces the silica gel stopper, the silica gel stopper can wrap up and live the syringe needle, can not lead to blood, make-up fluid to leak, when the syringe needle was pulled out, because the elasticity of silica gel stopper, the silica gel stopper can recover automatically, compresses tightly the pinhole and seals, can not lead to blood, make-up fluid to leak. However, the method of sampling by penetrating the silica gel plug with the needle is actually a destructive operation method, and when the silica gel plug is not sealed well and pressed tightly enough, if the needle is punctured for many times at the same position, the puncture hole becomes large, and blood and supplementary liquid are leaked.

SUMMERY OF THE UTILITY MODEL

Technical purpose

To prior art not enough, the utility model provides a needleless sampling connects for dialysis aims at improving not enough of present dialysis blood sampling operation, optimizes the structure that the sampling connects, solves the problem that syringe needle puncture silica gel stopper many times easily and have the blood leakage risk among the prior art.

(II) technical scheme

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the liquid inlet end of the needleless sampling joint for dialysis is fixedly connected to the external circulation pipeline of the dialysis machine. The needleless sampling joint for dialysis comprises a joint body and a silica gel plug, wherein the joint body is hollow inside, the bottom of the joint body is fixedly connected with a dialysis extracorporeal circulation pipeline, and the silica gel plug is embedded in the joint body; and a circulation pipeline for blood circulation is arranged in the silica gel plug.

The circulating pipeline is also provided with an annular sleeve in a fitting manner, the bottom of the annular sleeve is fixedly connected with a baffle plate for preventing blood from being flushed out of the silica gel plug, and the baffle plate can completely shield the circulating pipeline when abutting against the bottom of the silica gel plug; the bottom of the annular sleeve is provided with a circulation hole, the outer wall of the annular sleeve is provided with a convex block fixedly clamped with the silica gel plug, and the inner wall of the silica gel plug is provided with a clamping groove matched with the convex block.

When sampling is needed, the silica gel plug and the annular sleeve are extruded through the needle head of the needleless injector, then the injector, the annular sleeve and the dialysis extracorporeal circulation pipeline form a passage, blood can be sucked into the injector, and therefore the sampling process is completed, and the sampling can be completed without inserting the needle head in the process. The operation is simple and convenient, and the risk of blood leakage can be avoided.

It should be noted that blood may flow out of the annular sleeve due to the low external air pressure, and the baffle may prevent this problem from occurring. When the needle head of the needleless injector extrudes the silica gel plug and abuts against the top of the annular sleeve, the baffle moves downwards, and the circulation hole is exposed in the lower body passage of the joint, so that the smooth circulation of blood is realized; after the sampling is finished and the needle head leaves the annular sleeve, the convex block is driven to reset under the elastic action of the silica gel plug, the annular sleeve is also driven to reset, and the baffle continues to block the circulating pipeline.

The joint body is internally provided with an annular cavity with a larger outer diameter than the silica gel plug and used for accommodating the extruded silica gel plug. It should be noted that the utility model realizes the reset of the annular sleeve by the elasticity of the silica gel plug; when the silica gel plug is extruded by the needle head of the needleless injector, the lower part of the silica gel plug can be propped against the inner cavity of the joint body to generate stress damage to the inside of the silica gel plug, and the elasticity of the silica gel plug can be reduced after the silica gel plug is used for a long time; the annular cavity can provide buffer space for the deformation of silica gel stopper for the extrusion force reduces to the inside stress failure of silica gel stopper, ensures that the silica gel stopper possesses good elasticity performance for a long time, has prolonged the holistic life of sampling joint.

Furthermore, the top of the connector body is provided with external thread teeth used for being connected with the needleless injector.

Furthermore, the top of the joint body is provided with a limiting part for preventing the needleless injector from screwing too deep, and the limiting part is positioned on the lower side of the external thread teeth.

Further, the lug is obliquely arranged towards one side close to the baffle.

Further, the annular sleeve is made of medical PP materials.

Further, the outer wall of silica gel stopper is equipped with the arcwall face with annular cavity inner wall adaptation.

Further, the outer wall of the silica gel plug is provided with a step part B matched with the top surface of the annular cavity.

Further, the bottom of the inner cavity of the joint body is provided with an annular step part A for preventing the silica gel plug from moving downwards.

Furthermore, the needleless sampling joint for dialysis further comprises an operation panel convenient for sampling, and the operation panel is fixedly sleeved outside the joint body and the dialysis extracorporeal circulation pipeline; the operation panel includes the symmetry sets up a set of handheld arm in connect body both sides.

Further, the joint body comprises a joint upper body and a joint lower body which are detachably connected, and the joint lower body is connected with the dialysis extracorporeal circulation pipeline.

(III) advantageous effects

Compared with the prior art, the beneficial effects of the utility model reside in that:

compared with the existing sampling joint, the sampling joint has the advantages that the needle head of the injector penetrates into the silica gel plug for sampling, so that the risk of blood leakage exists, the sampling joint is provided with the sampling channel, the sampling can be completed by directly using a needleless injector for connection, the structure is simple, and the operation is convenient; secondly, the risk of blood leakage is avoided by arranging the annular sleeve and the baffle; and an annular cavity is formed in the inner cavity of the sampling body, so that a buffer space is provided for extrusion deformation of the silica gel plug, the damage to the silica gel plug is reduced, the silica gel plug is ensured to have good elastic performance for a long time, and the service life of the whole sampling joint is prolonged.

Drawings

Fig. 1 is a schematic view of the appearance structure of the present invention;

fig. 2 is a partial cross-sectional view of the present invention with respect to a fitting body;

FIG. 3 is a diagram illustrating the usage of the present invention;

description of reference numerals: 1-a joint upper body; 11-an annular cavity; 12-external thread ridge; 13-a limiting part; 2-a joint lower body; 21-step A; 22-fitting lower body passage; 3-silica gel plug; 31-arc surface; 32-a flow-through conduit; 33-step B; 34-a bump; 4-dialysis extracorporeal circulation circuit; 5-operating panel; 51-a handheld arm; 6-an annular sleeve; 61-flow through holes; 62-a baffle; 7-needle head.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The terms "a", "B", etc. are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-3, the present invention provides a preferred embodiment of a needleless sampling connector for dialysis.

The liquid inlet end of the needleless sampling joint for dialysis is fixedly connected to the extracorporeal circulation pipeline 4 for dialysis. The needleless sampling joint for dialysis comprises a joint body and a silica gel plug 3, wherein the joint body is hollow inside, the bottom of the joint body is fixedly connected with a dialysis extracorporeal circulation pipeline 4, and the silica gel plug 3 is embedded in the joint body; a circulation pipe 32 for circulating blood is opened in the silica gel plug 3.

The circulation pipeline 32 is also provided with an annular sleeve 6 in a bonding manner, the bottom of the annular sleeve 6 is fixedly connected with a baffle plate 62 for preventing blood from rushing out of the silica gel plug 3, and the baffle plate 62 can completely shield the circulation pipeline 32 when abutting against the bottom of the silica gel plug 3; the bottom of the annular sleeve 6 is provided with a circulation hole 61, the outer wall of the annular sleeve 6 is provided with a convex block 34 fixedly clamped with the silica gel plug 3, and the inner wall of the silica gel plug 3 is provided with a clamping groove matched with the convex block 34.

As shown in fig. 1-3, when sampling is needed, the needle 7 of the needleless injector extrudes the silica gel plug 3 and the annular sleeve 6, the injector, the annular sleeve 6 and the dialysis extracorporeal circulation pipeline 4 form a passage, blood can be sucked into the injector, and thus the sampling process can be completed without inserting the needle 7. The operation is simple and convenient, and the risk of blood leakage can be avoided.

It should be noted that, because of the low external air pressure, blood may flow out of the annular sleeve 6, and the baffle 62 may prevent this problem from occurring. When the needle 7 of the needleless injector extrudes the silica gel plug 3 and abuts against the top of the annular sleeve 6, the baffle plate 62 moves downwards and the circulation hole 61 is exposed in the joint lower body passage 22, so that the smooth circulation of blood is realized; after the sampling needle 7 leaves the annular sleeve 6, the bump 34 is driven to reset under the elastic action of the silicone plug 3, and also drives the annular sleeve 6 to reset, and the baffle 62 continues to block the flow channel 32.

The joint body is internally provided with an annular cavity 11 with a larger outer diameter than the silica gel plug 3 for accommodating the extruded silica gel plug 3.

It should be noted that the utility model discloses an utilize the elasticity of silica gel stopper 3 to realize the sealed to toroidal cavity 6 to and the reposition of silica gel stopper 3. As shown in fig. 3, when the silicone plug 3 is pressed by the needle 7 of the needleless injector, the lower part of the silicone plug 3 will be pressed against the inner cavity of the joint body, so as to generate stress damage to the inside of the silicone plug 3, and after long-term use, the elasticity will be reduced; annular cavity 11 can provide buffer space for the deformation of silica gel stopper 3 for the extrusion force reduces to the inside stress failure of silica gel stopper 3, ensures that silica gel stopper 3 possesses good elasticity performance for a long time, has prolonged the holistic life of sampling joint.

Referring to fig. 1 and 2, in the embodiment, in a further modification, the top of the connector body is provided with an external thread tooth 12 for connecting with a needleless injector. The periphery of the needle head of the existing needleless injector is provided with an internal thread tooth which can be matched with the external thread tooth 12, so that the connection tightness of the needleless injector and the sampling joint is improved.

Referring to fig. 1 and 2, in the present embodiment, in a further improvement, a stopper 13 for preventing the needleless injector from being screwed too deep is disposed at the top of the connector body, and the stopper 13 is located at the lower side of the external thread 12. Because the manual operation is carried out when the needleless injector is screwed in, the screwing depth can not be controlled, the silica gel plug 3 is easily damaged when the screwing is too deep, the blood circulation is not smooth and the efficiency is affected when the screwing is too shallow, and the limiting part 13 can limit the screwing position of the needle head 7 of the needleless injector to ensure that the screwing depth is proper.

Referring to fig. 2 and 3, in this embodiment, the protrusion 3 is inclined toward a side close to the baffle 62, so that when the annular sleeve 6 moves downward and the silica gel plug 3 is displaced, the protrusion 34 is prevented from coming out of the silica gel plug 3, and the annular sleeve 6 cannot be reset after sampling is completed.

In this embodiment, further modified, the annular sleeve 6 is made of medical PP material. The medical PP material is widely used in the field of medical instruments, is nontoxic, tasteless and pollution-free, and has excellent rigidity and good low-temperature impact resistance.

Referring to fig. 2 and fig. 3, in the present embodiment, further modified, the outer wall of the silicone plug 3 is provided with an arc surface 31 adapted to the inner wall of the annular cavity 11. The arcuate surface 31 limits excessive displacement of the plug 3 within the interior cavity of the connector body.

Referring to fig. 2, in this embodiment, in a further improvement, the outer wall of the silicone plug 3 is provided with a step B33 adapted to the top surface of the annular cavity 11. The step B33 may further limit excessive displacement of the silicone plug 3 within the interior cavity of the fitting body.

Referring to fig. 2, in this embodiment, in a further improvement, an annular step portion a21 is provided at the bottom of the inner cavity of the joint body, so as to prevent the silicone plug 3 from moving downward. It should be noted that the step a21 can firstly play a role in stopping the downward movement of the silicone plug 3, and then the step a21 can provide a pressing force for the silicone plug 3 to force the silicone plug 3 to be pressed and deformed, so as to facilitate the blood sampling.

Referring to fig. 1 and fig. 2, in this embodiment, in a further improvement, the needleless sampling connector for dialysis further includes an operation panel 5 for facilitating sampling, and the operation panel 5 is fixedly sleeved outside the connector body and the extracorporeal circulation pipeline 4 for dialysis; the operating panel 5 comprises a set of hand-held arms 51 symmetrically arranged on both sides of the joint body. The operation panel 5 can play a role in stabilizing the connection relationship between the connector body and the dialysis extracorporeal circulation pipeline 4; when the needleless injector is used for screwing the sampling joint, the holding arm 51 is convenient for fingers to hold and is convenient for the force of screwing operation.

Referring to fig. 2, in this embodiment, it is further improved that the connector body includes a connector upper body 1 and a connector lower body 2 which are detachably connected, and the connector lower body 2 is connected with the dialysis extracorporeal circulation line 4. The connector body is detachably connected, and is convenient to disassemble to clean the interior of the connector body.

Claims

1. Needleless sampling joint is used in dialysis, its feed liquor end fixed connection on dialysis extracorporeal circulation pipeline (4), its characterized in that: the needleless sampling joint for dialysis comprises a joint body and a silica gel plug (3), wherein the joint body is hollow inside, the bottom of the joint body is fixedly connected with a dialysis extracorporeal circulation pipeline (4), and the silica gel plug (3) is embedded in the joint body; a circulation pipeline (32) for blood circulation is arranged in the silica gel plug (3);

the circulating pipeline (32) is further provided with an annular sleeve (6) in a fitting manner, the bottom of the annular sleeve (6) is fixedly connected with a baffle plate (62) used for preventing blood from rushing out of the silica gel plug (3), and the baffle plate (62) can completely shield the circulating pipeline (32) when abutting against the bottom of the silica gel plug (3); the bottom of the annular sleeve (6) is provided with a circulation hole (61), the outer wall of the annular sleeve (6) is provided with a convex block (34) which is fixedly clamped with the silica gel plug (3), and the inner wall of the silica gel plug (3) is provided with a clamping groove which is matched with the convex block (34);

the joint body is internally provided with an annular cavity (11) with a larger outer diameter than the silica gel plug (3) for accommodating the extruded silica gel plug (3).

2. The needleless sampling connector for dialysis as claimed in claim 1, wherein: the top of the connector body is provided with an external thread (12) used for being connected with a needleless injector.

3. The needleless sampling connector for dialysis as claimed in claim 2, wherein: the top of the joint body is provided with a limiting part (13) for preventing the needleless injector from screwing too deep, and the limiting part (13) is positioned at the lower side of the external thread (12).

4. The needleless sampling connector for dialysis as claimed in claim 1, wherein: the projection (34) is obliquely arranged towards one side close to the baffle plate (62).

5. The needleless sampling connector for dialysis as claimed in claim 1, wherein: the annular sleeve (6) is made of medical PP materials.

6. The needleless sampling connector for dialysis as claimed in claim 1, wherein: the outer wall of the silica gel plug (3) is provided with an arc-shaped surface (31) matched with the inner wall of the annular cavity (11).

7. The needleless sampling connector for dialysis as claimed in claim 1, wherein: the outer wall of the silica gel plug (3) is provided with a step part B (33) matched with the top surface of the annular cavity (11).

8. The needleless sampling connector for dialysis as claimed in claim 1, wherein: the bottom of the inner cavity of the joint body is provided with an annular step part A (21) for preventing the silica gel plug (3) from moving downwards.

9. A needleless sampling port for dialysis as claimed in any one of claims 1 to 8 wherein: the needleless sampling joint for dialysis further comprises an operation panel (5) convenient for sampling, and the operation panel (5) is fixedly sleeved outside the joint body and the dialysis extracorporeal circulation pipeline (4); the operation panel (5) comprises a group of handheld arms (51) symmetrically arranged on two sides of the joint body.

10. The needleless sampling connector for dialysis as claimed in claim 1, wherein: the connector body comprises a connector upper body (1) and a connector lower body (2) which are detachably connected, and the connector lower body (2) is connected with the dialysis extracorporeal circulation pipeline (4).