CN109498873B

CN109498873B - Extracorporeal hemodialysis system

Info

Publication number: CN109498873B
Application number: CN201811601173.3A
Authority: CN
Inventors: 廖磊
Original assignee: Bain Medical Equipment Guangzhou Co ltd
Current assignee: Bain Medical Equipment Guangzhou Co ltd
Priority date: 2018-12-26
Filing date: 2018-12-26
Publication date: 2024-03-08
Anticipated expiration: 2038-12-26
Also published as: CN109498873A

Abstract

The invention relates to an extracorporeal hemodialysis system, which is characterized by comprising a dialyzer, an arterial dialysis pipeline and a venous dialysis pipeline, wherein the arterial dialysis pipeline comprises a first dialysis joint used for being connected with the dialyzer, the venous dialysis pipeline comprises a second dialysis joint used for being connected with the dialyzer, the arterial dialysis pipeline is connected with the dialyzer through the first dialysis joint, and the venous dialysis pipeline is connected with the dialyzer through the second dialysis joint. The extracorporeal hemodialysis system provided by the invention can complete sampling without inserting a needle, is convenient to operate and can avoid the risk of leakage of blood or replenishing liquid; and when the gas in the pipeline is discharged, the impact force during blood inflow can be reduced, and the coagulation risk is reduced.

Description

Extracorporeal hemodialysis system

Technical Field

The invention relates to the field of extracorporeal hemodialysis body structures, in particular to an extracorporeal hemodialysis system.

Background

The hemodialysis extracorporeal circulation pipeline is a connection pipeline for extracorporeal dialysis of a human body, and is mainly used for connecting the human body with the dialyzer, conveying blood in the human body to the dialyzer for purification, and guiding the blood back to the human body to form circulation. The function is to replace blood vessels and to act as a conduit for blood flow. The hemodialysis external circulation pipeline consists of an arterial tube and a venous tube, which are respectively connected with a dialyzer and respectively connected into arteries and veins of a human body.

The pipeline needs to collect blood and a replenishing liquid sample according to the needs in the use process, and the sampling connector can collect the sample conveniently under the condition that the pipeline is not damaged. In the prior art, the sampling joint is sealed by compressing the silica gel plug and utilizing the elasticity of the silica gel plug. When the syringe needle pierces the silica gel plug to sample when needed, the elasticity of the silica gel plug is utilized, when the syringe needle pierces the silica gel plug, the silica gel plug can wrap the syringe needle, blood and replenishing liquid can not be caused to leak, when the syringe needle is pulled out, the silica gel plug can automatically recover due to the elasticity of the silica gel plug, the needle hole is tightly pressed and sealed, and blood and replenishing liquid can not be caused to leak. The prior art has the following defects: 1. because the silica gel plug plays a sealing role by the elastic force of the compression, the silica gel plug must be pressed tightly, but if the silica gel plug is pressed too tightly, the silica gel plug is too tightly, the needle is difficult to penetrate into the silica gel plug, and the operation is inconvenient 2. The mode of using the needle to penetrate the silica gel plug for sampling is actually a destructive operation mode, when the silica gel plug is not sealed well enough and is not pressed tightly enough, if the puncture needle is penetrated for many times at the same position, the puncture hole is enlarged, and the risk of leakage of blood and replenishing liquid exists.

In addition, the hemodialysis extracorporeal circulation pipeline needs to remove the gas in the pipeline in the use process so as to avoid the risk of air lock caused by the gas entering the human body. Besides the pre-flushing pipeline for exhausting gas, the gas generated in the treatment process is required to be collected through the drip chamber, so that the risk of the gas entering the human body is reduced. In the prior art, blood flows in from the upper cover of the drip chamber, and is directly dripped into the drip chamber, and as the blood directly flows in from the upper cover of the blood vessel, the height difference is large, and the risk of blood cell breaking to cause coagulation exists.

Disclosure of Invention

The invention provides an extracorporeal hemodialysis system, which is characterized in that a sampling slit is arranged on a silica gel plug of a sampling joint, so that sampling can be completed without inserting a needle, the operation is convenient, and the risk of leakage of blood or replenishing liquid can be avoided; in addition, through setting up the feed liquor passageway as turn structure in the drip chamber body, blood gets into from the upper end of feed liquor passageway to flow from the lateral part of feed liquor passageway's lower extreme, need in the inside of drip chamber body is dripped again to the one turn in the feed liquor passageway, reduces the impact force when blood flows, reduces the coagulation risk.

To achieve the above object, the present invention provides an extracorporeal hemodialysis system including a dialyzer, an arterial dialysis line, and a venous dialysis line,

the arterial dialysis pipeline comprises a first dialysis joint, a first pressure sensor, a sampling joint, a first puncture needle pipe connecting joint, a second hemostatic clamp, a first mother needle base branch pipeline, a sixth hose and a seventh hose, wherein the first dialysis joint is used for being connected with the dialyzer, the first pressure sensor is used for detecting the liquid pressure in the pipeline, the first dialysis joint is connected with the liquid inlet end of the first pressure sensor through the pipeline, the liquid outlet end of the sampling joint is connected with the liquid inlet end of the sampling joint through the sixth hose, the liquid outlet end of the sampling joint is connected with the first puncture needle pipe connecting joint through the seventh hose, the second hemostatic clamp is arranged on the seventh hose, a branch interface is arranged on the pipeline between the first dialysis joint and the first pressure sensor, and the first mother needle base branch pipeline is connected with the branch interface;

the venous dialysis pipeline comprises a second dialysis joint, a second pressure sensor, a venous drip chamber, a third hemostatic clamp, a second puncture needle pipeline connecting joint, a tenth hose, a twelfth hose and a second female needle-based branch pipeline, wherein the second dialysis joint is used for detecting the liquid pressure in the pipeline, a liquid outlet of the second dialysis joint is connected with a liquid inlet of the second pressure sensor, a liquid outlet of the second pressure sensor is connected with a liquid inlet of the venous drip chamber through the tenth hose, a liquid outlet of the venous drip chamber is connected with the second puncture needle pipeline connecting joint through the twelfth hose, a first branch pipe interface is arranged at the upper end of the venous drip chamber, a liquid outlet end of the second female needle-based branch pipeline is connected with the first branch pipe interface, and the third hemostatic clamp is arranged on the twelfth hose;

the arterial dialysis pipeline is connected with the dialyzer through the first dialysis connector, and the venous dialysis pipeline is connected with the dialyzer through the second dialysis connector.

As the preferred scheme, the sampling joint is including being hollow tubular sampling joint body and silica gel stopper, the outer wall that the sampling connects the body is equipped with and is used for fixing the fixed slot of silica gel stopper, the bottom of fixed slot be equipped with the inside intercommunication of sampling joint body sampling hole, the silica gel stopper inlay locate in the fixed slot and with fixed slot sealing connection, the surface of silica gel stopper is equipped with sampling seam, sampling seam can with adopt the hole intercommunication, pressure sensor's liquid outlet end passes through sixth hose with sampling joint body's feed liquor end is connected, sampling joint body's liquid outlet end passes through seventh hose with puncture needle way attach fitting connects.

As the preferred scheme, the sampling joint still includes the sampling lid, the lower extreme of sampling lid with the up end sealing connection of fixed slot, the upper and lower both ends of silica gel pad respectively with the lower terminal surface of sampling lid and the up end of fixed slot offset, be equipped with the second through-hole that can supply the head male of syringe on the sampling lid, the second through-hole accessible the sampling seam with the sampling hole intercommunication.

As the preferable scheme, the venous drip chamber comprises a drip chamber body, wherein the upper end and the lower end of the drip chamber body are respectively provided with a blood inlet and a blood outlet, the upper part of the inner wall of the drip chamber body is provided with a liquid inlet channel, the upper end of the liquid inlet channel is connected with the blood inlet, the lower end of the liquid inlet channel is closed, and the side wall of the liquid inlet channel is provided with an opening.

As the preferred scheme, blood exit is equipped with the filter screen that is the cylinder form, the lower extreme of drip chamber body is equipped with liquid outlet channel, liquid outlet channel's upper end is the blood outlet, the lower extreme of filter screen is fixed in liquid outlet channel's inside, liquid outlet channel upper portion's inner wall is equipped with inwards extends and can block the lower extreme of filter screen gets into the inside annular spacing arch of drip chamber body, the lateral wall of the lower extreme of filter screen be equipped with annular spacing recess that annular spacing arch corresponds, the filter screen passes through annular spacing recess is fixed in liquid outlet channel's annular spacing arch department.

As the preferred scheme, the structure of first pressure sensor and second pressure sensor is the same and includes pressure conduction structure and pressure sensing device respectively, pressure conduction structure is including being used for with the pipe connection and being hollow tubular conduction structure body, diaphragm, first lid and pipe, the lateral wall of conduction structure body is equipped with the opening, first lid and the lateral wall sealing connection of conduction structure body, the opening is located the inside of first lid, the diaphragm set up in between conduction structure body and the first lid and with opening sealing connection, the diaphragm with first lid interval sets up and is in form the pressure chamber between diaphragm and the first lid, the lower extreme of pipe is inserted and is located the inside of first lid and with the pressure chamber intercommunication, the upper end of pipe with pressure sensing device is connected.

Preferably, the membrane is bulged towards the inside of the conductive structure body; the first cover body comprises an arc-shaped surface which is arranged back to the membrane; the conductive structure body is provided with a curved surface section which has the same shape as the membrane and bulges towards the outer side, and the curved surface section is arranged opposite to the opening.

As a preferred scheme, the first female needle base branch pipeline and the second female needle base branch pipeline have the same structure and comprise a second hose, a first female needle base, a female needle base cover and a first hemostatic clamp, one end of the second hose is connected with the branch joint, the other end of the second hose is connected with one end of the first female needle base, and the female needle base cover is connected with the other end of the first female needle base.

As a preferable scheme, the structure of the first hemostatic clamp is the same as that of the second hemostatic clamp, the first hemostatic clamp comprises a first clamp arm, a connecting arm and a second clamp arm, one end of the first clamp arm is connected with the first end of the second clamp arm through the connecting arm, the upper part of the second clamp arm is bent towards the first clamp arm and forms a bending section which is opposite to the connecting arm, the other end of the first clamp arm is provided with a guide part which extends inwards, the outer surface of the joint of the guide part and the first clamp arm is provided with a second clamping groove, the other end of the second clamp arm is provided with a second clamp buckle which extends inwards and can be clamped in the second clamping groove, the guide part is positioned in the guide hole when the second clamp buckle is clamped in the second clamping groove, the connecting arm is provided with a first through hole which is opposite to the guide hole and can be penetrated by a pipeline, the other end of the second clamp arm is provided with a second clamp buckle which extends inwards and can be clamped in the second clamping groove, the guide hole corresponding to the guide part is positioned in the guide hole, and the first clamp arm is opposite to the first clamp arm is provided with a first clamp arm, and the first clamp arm which is opposite to the first clamp arm;

the end part of the second clamping arm, which is close to one end of the second buckle, is provided with a first handle bent back to one side of the second buckle.

As the preferred scheme, arterial dialysis pipeline still includes first washing joint, venous dialysis pipeline still includes the second washing joint, first washing joint includes the second lid and is the washing joint body of cavity cylinder form, will the both ends of washing joint body are defined respectively as first link and second link, the second lid with first link buckle is connected, the lateral wall of washing joint body is connected with the outrigger, the tip of outrigger with the tip parallel and level of the first link of washing joint body, the outer wall of second lid through the connecting piece with the tip rotatable coupling of outrigger just the second lid is rotatable to with the first link of washing joint body closes, be equipped with outwards extend and with the second handle that the up end of second lid set up perpendicularly, the second link with puncture way attach fitting can dismantle and be connected.

According to the extracorporeal hemodialysis system provided by the technical scheme, the dialyzer, the arterial dialysis pipeline and the venous dialysis pipeline are matched together to realize the dialysis of arterial and venous blood of a human body, wherein the sampling seam is arranged on the silica gel plug of the sampling connector, the sampling can be completed without inserting a needle, the operation is convenient, and the risk of leakage of blood or supplementary liquid can be avoided; in addition, through setting up the feed liquor passageway as turn structure in the drip chamber body, blood gets into from the upper end of feed liquor passageway to flow from the lateral part of feed liquor passageway's lower extreme, need in the inside of drip chamber body is dripped again to the one turn in the feed liquor passageway, reduces the impact force when blood flows, reduces the coagulation risk.

Drawings

FIG. 1 is a schematic diagram of an arterial dialysis line;

FIG. 2 is a schematic view of the venous dialysis tubing;

FIG. 3 is a schematic diagram of a sampling joint;

FIG. 4 is a top view of a sampling joint;

FIG. 5 is a schematic view of the structure of the connection between the sampling cap and the silica gel plug;

FIG. 6 is a schematic view of a first hemostatic clip;

FIG. 7 is a cross-sectional view of the internal structure of the pressure conducting structure;

FIG. 8 is an enlarged view of a portion of the junction of the cover and the conductive structure body;

FIG. 9 is a schematic structural view of a pressure conducting structure;

FIG. 10 is a schematic structural view of a pressure-conducting structure (II);

FIG. 11 is a schematic structural view of a flush joint;

FIG. 12 is a schematic view of the structure of the venous drip chamber;

fig. 13 is a partial enlarged view at a in fig. 12.

Wherein: 1. a first dialysis connector cap; 2. a first dialysis adapter; 3. a connection joint; 4. a pressure conducting structure; 5. a first hemostatic clip; 6. a first female needle base; 7. a first female needle base cover; 8. a second female needle base; 9. a sampling joint; 10. a second hemostatic clip; 11. the first puncture needle tube way is connected with the joint; 12. a first flush joint; 13. a first hose; 14. a second hose; 15. a third hose; 16. a fourth hose; 17. a fifth hose; 18. a sixth hose; 19. a seventh hose;

20. a second dialysis connector cap; 21. a second dialysis adapter; 22. a second pressure conducting structure; 23. a venous drip chamber; 24. a third female needle base; 25. a second female needle base cover; 26. a fourth female needle base; 27. a third hemostatic clip; 28. a fourth hemostatic clip; 29. the second puncture needle tube way is connected with the joint; 30. a second flush joint; 31. an eighth hose; 32. a ninth hose; 33. a tenth hose; 34. an eleventh hose; 35. a twelfth hose;

401. a conductive structural body; 402. a first cover; 403. a conduit; 404. an arc surface; 405. a membrane; 406. a third annular projection; 407. a first annular projection; 408. a first annular groove; 409. a second annular projection;

501. a bending section; 502. a first handle; 503. a guide part; 504. a second clamping groove; 505. a first clamp arm; 506. a first clamping part; 507. a connecting arm; 508. a first through hole; 509. a second clamping portion; 510. a second clamp arm; 511. a guide hole; 512. a second buckle;

901. a sampling joint body; 902. anti-skid lines; 903. a sampling cover; 904. a second through hole; 905. a screw thread structure; 906. a sampling slit; 907. a silica gel plug;

1201. a second cover; 1202. a second handle; 1203. an outrigger; 1204. reinforcing ribs; 1205. flushing the joint body; 1206. a first buckle; 1207. a plunger; 1208. a first clamping groove;

2301. a liquid outlet channel; 2302. a drip chamber body; 2303. a blood inlet; 2304. a first branch pipe interface; 2305. a filter screen; 2306. a liquid inlet channel; 2307. an opening; 2308. an annular limit groove; 2309. annular spacing protruding.

Detailed Description

The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.

Referring to fig. 1-13, an extracorporeal hemodialysis system provided in this embodiment includes a dialyzer, an arterial dialysis line and a venous dialysis line, where the arterial dialysis line includes a first dialysis connector 2 for connecting with the dialyzer, a first pressure sensor for detecting a liquid pressure in the line, a sampling connector 9, a first puncture needle tube connector 11, a second hemostatic clip 10, a first parent needle-based branch line, a sixth hose 18, a first dialysis connector cover 1 and a seventh hose 19, the first dialysis connector 2 is connected with a liquid inlet end of the first pressure sensor through a pipeline, a liquid outlet end of the first pressure sensor is connected with a liquid inlet end of the sampling connector 9 through the sixth hose 18, a liquid outlet end of the sampling connector 9 is connected with the first puncture needle tube connector 11 through the seventh hose 19, the second hemostatic clip 10 is disposed on the seventh hose 19, a branch line interface is disposed on the line between the first parent needle-based branch line 2 and the first pressure sensor, and the first parent needle-based branch line interface is connected with the first parent needle-based branch line interface; preferably, a connecting joint 3 is arranged between the dialysis joint and the pressure sensor, the connecting joint 3 adopts a three-way pipe, a first end of the three-way pipe is connected with the first dialysis joint 2 through a first hose 13, a second end of the three-way pipe is connected with the first pressure sensor through a third hose 15, and a third section of the three-way pipe is connected with the first mother needle base branch pipe. The venous dialysis pipeline comprises a second dialysis joint 21 used for being connected with a dialyzer, a second pressure sensor used for detecting the liquid pressure in the pipeline, a venous drip chamber 23, a third hemostatic clip 27, a second puncture needle pipeline connecting joint 29, a tenth hose 33, a twelfth hose 35, a second dialysis joint cover 20 and a second female needle base branch pipeline, a liquid outlet of the second dialysis joint 21 is connected with a liquid inlet of the second pressure sensor, a liquid outlet of the second pressure sensor is connected with a liquid inlet of the venous drip chamber 23 through the tenth hose 33, a liquid outlet of the venous drip chamber 23 is connected with the second puncture needle pipeline connecting joint 29 through the twelfth hose 35, a first branch pipe joint 2304 is arranged at the upper end of the venous drip chamber 23, a liquid outlet end of the second female needle base branch pipeline is connected with the first branch pipe joint 2304, and the third hemostatic clip 27 is arranged on the twelfth hose 35; the arterial dialysis line is connected to the dialyzer by the first dialysis connector 2 and the venous dialysis line is connected to the dialyzer by the second dialysis connector 21.

Referring to fig. 3-5, in this embodiment, the sampling connector 9 includes a hollow tubular sampling connector body 901 and a silica gel plug 907, a fixing groove for fixing the silica gel plug 907 is provided on an outer wall of the sampling connector body 901, a sampling hole communicated with an interior of the sampling connector body 901 is provided at a bottom of the fixing groove, the silica gel plug 907 is embedded in the fixing groove and is in sealing connection with the fixing groove, a sampling slit 906 is provided on a surface of the silica gel plug 907, the sampling slit 906 is communicated with the sampling hole, a liquid outlet end of the pressure sensor is connected with a liquid inlet end of the sampling connector body 901 through a sixth hose 18, and a liquid outlet end of the sampling connector body 901 is connected with the puncture needle tube path connecting connector through a seventh hose 19. Specifically, when needs sampling, extrude the silica gel piece through the syringe, with the gap pressure of silica gel piece big, sampling joint body 901 inside blood or supplementary liquid loops through adopt hole and sampling seam 906 and get into the inside of syringe to accomplish the sampling process, above-mentioned process need not to insert the syringe needle and can accomplish the sampling, convenient operation just can avoid blood or supplementary liquid to appear leaking the risk.

Further, in order to facilitate connection of the sampling connector 9 and the needleless injector, in this embodiment, the sampling connector 9 further includes a sampling cover 903, a lower end of the sampling cover 903 is in sealing connection with an upper end face of the fixing groove, an upper end and a lower end of the silica gel pad are respectively abutted against a lower end face of the sampling cover 903 and an upper end face of the fixing groove, a second through hole 904 into which a head of the injector can be inserted is formed in the sampling cover 903, and the second through hole 904 can be communicated with the sampling hole through the sampling slit 906. Specifically, the head of the syringe may be inserted into the second through-hole 904 and the silicone sheet is pressed, thereby implementing the sampling process.

Still further, in this embodiment, the upper end surface of the fixing groove is provided with an upward protruding clamping strip, the lower end of the sampling cover 903 is provided with a clamping groove corresponding to the clamping strip, the sampling cover 903 is clamped with the clamping strip of the fixing groove through the clamping groove, the bottom of the fixing groove is provided with a protrusion arranged towards the silica gel plug 907, the bottom surface of the silica gel plug 907 is provided with a groove corresponding to the protrusion, and the protrusion is embedded in the groove. In this way, the position of the silica gel pad can be ensured to be fixed relatively all the time, so that the service life of the sampling joint 9 is prolonged.

Still further, the upper end of the sampling cap 903 is hollow and cylindrical, and the upper end of the sampling cap 903 is provided with a screw structure 905 for sealing connection with a syringe. Because the syringe with partial sampling needle is provided with the inner screw teeth, the syringe can be matched with the outer screw teeth of the cover of the sampling joint 9, so that the syringe and the cover of the sampling joint 9 are sealed more tightly.

In addition, sampling joint body 901 is hollow cylinder form and includes head end and tail end, the inside of sampling joint body 901 is equipped with the sampling chamber, the sectional area of sampling chamber is less than the sectional area of the hole of sampling joint body 901, the sampling chamber with adopt hole intercommunication and relative setting, so, can guarantee blood or supplementary liquid when flowing through the sampling chamber, pressure relatively increases to conveniently extrude from sampling seam 906.

In this embodiment, the cross-sectional shape of the silica gel plug 907 is in an interference fit with the cross-sectional shape of the fixing groove, so that the silica gel plug 907 is guaranteed to be relatively tight, and leakage of blood or replenishment liquid under non-sampling conditions is avoided. The outer wall of sampling joint body 901 is equipped with anti-skidding line 902, so, can conveniently take sampling joint 9.

Referring to fig. 12-13, in the structural schematic diagram of the venous drip chamber 23 provided in this embodiment, the venous drip chamber 23 includes a drip chamber body 2302, a blood inlet 2303 and a blood outlet are respectively provided at the upper end and the lower end of the drip chamber body 2302, a liquid inlet channel 2306 is provided at the upper portion of the inner wall of the drip chamber body 2302, the upper end of the liquid inlet channel 2306 is connected with the blood inlet 2303, the lower end of the liquid inlet channel 2306 is closed, and an opening 2307 is provided at the side wall of the liquid inlet channel 2306. Specifically, by providing the liquid inlet channel 2306 as a turning structure in the drip chamber body 2302, blood enters from the upper end of the liquid inlet channel 2306 and flows out from the side portion of the lower end of the liquid inlet channel 2306, and needs to turn in the liquid inlet channel 2306 and drop into the drip chamber body 2302, so that the impact force when blood flows in is reduced and the coagulation risk is reduced.

Further, a filter screen 2305 is provided at the blood outlet, preferably, the filter screen 2305 is cylindrical, a liquid outlet channel 2301 is provided at the lower end of the drip chamber body 2302, the upper end of the liquid outlet channel 2301 is the blood outlet, and the lower end of the filter screen 2305 is fixed inside the liquid outlet channel 2301. For filtering blood, it is further preferable that an inner wall of an upper portion of the liquid outlet channel 2301 is provided with an annular limiting protrusion 2309 extending inward and capable of blocking a lower end of the filter screen 2305 from entering the inside of the drip chamber body 2302, a sidewall of a lower end of the filter screen 2305 is provided with an annular limiting groove 2308 corresponding to the annular limiting protrusion 2309, and the filter screen 2305 is fixed at the annular limiting protrusion 2309 of the liquid outlet channel 2301 through the annular limiting groove 2308. So, filter screen 2305 gets into the inside of drip chamber from the outdoor equipment of drip, and annular spacing protruding 2309 through the upper portion of drain channel 2301 is fixed and spacing with filter screen 2305, and filter screen 2305's lower extreme can't pass the inside that annular spacing protruding 2309 got into the drip chamber, so, can effectually prevent filter screen 2305 and get into the drip chamber, reduce the risk that filter screen 2305 drops.

Referring to fig. 7-10, the first pressure sensor and the second pressure sensor have the same structure and respectively include a pressure conducting structure and a pressure sensing device, and the pressure conducting structure of the first pressure sensor is defined as a first pressure conducting structure 4; the pressure conducting structure of the second pressure sensor is defined as a second pressure conducting structure 22. The specific structure of the first pressure conductive structure 4 is further described below as an example:

the pressure conducting structure comprises a conducting structure body 401, a diaphragm 405, a first cover body 402 and a conduit 403, wherein the conducting structure body 401 is connected with a pipeline and is in a hollow tubular shape, an opening is formed in the side wall of the conducting structure body 401, the first cover body 402 is in sealing connection with the side wall of the conducting structure body 401, the opening is positioned in the first cover body 402, the diaphragm 405 is arranged between the conducting structure body 401 and the first cover body 402 and is in sealing connection with the opening, the diaphragm 405 is arranged at intervals with the first cover body 402 and forms a pressure cavity between the diaphragm 405 and the first cover body 402, the lower end of the conduit 403 is inserted into the first cover body 402 and is communicated with the pressure cavity, the upper end of the conduit 403 is connected with the pressure sensing device, and preferably, the first pressure sensor further comprises a fourth hose 16, a fifth hose 17 and a second female needle 8, which are used for connecting the conduit 403 with the pressure sensing device; the second pressure sensor further comprises an eighth hose 31, a ninth hose 32 and a third female needle base 24. Specifically, the membrane 405 is disposed at the opening of the side wall of the conductive structure body 401 to directly contact with blood, when blood flows, due to the pressure change, the positive pressure or the negative pressure is applied, the pressure conductive membrane is used for vertically agitating the pressure cavity, so as to expand or compress the air volume in the pressure cavity to conduct the pressure, and the conduit 403 is connected with the pressure sensing device, so that the pressure is conducted, and the accurate detection of the pressure is facilitated. In addition, by inserting the lower end of the conduit 403 into the first cover 402, the conduit 403 may extend into the pressure cavity, and when the diaphragm 405 is completely blown up toward the first cover 402, it may be pushed up, and may not be completely stuck to the upper cover surface of the pressure cavity, so as to prevent the pressure cavity from being completely inflated, and the volume in the pressure cavity may not change any more, so that pressure may not be transferred.

In this embodiment, the membrane 405 bulges towards the inside of the conductive structure body 401, the first cover 402 includes an arc surface 404 facing away from the membrane 405, the conductive structure body 401 is provided with a curved surface section that has the same shape as the membrane 405 and bulges towards the outside, and the curved surface section is disposed opposite to the opening, so that it can be ensured that blood between the membrane 405 and the inner wall of the conductive structure body 401 can always flow normally, and a blocking phenomenon can not occur.

Further, the outer edge of the diaphragm 405 is fixedly disposed at the connection between the first cover 402 and the conductive structure body 401, the outer edge of the diaphragm 405 is bent upward to form a first annular groove 408, the lower end surface of the first cover 402 is provided with a first annular protrusion 407 corresponding to the first annular groove 408 and embedded in the first annular groove 408, the outer surface of the conductive structure body 401 is provided with a second annular groove, the lower end surface of the first cover 402 is provided with a second annular protrusion 409 corresponding to the second annular groove and embedded in the second annular groove, the lower end surface of the diaphragm 405 is provided with a third annular groove, and the outer surface of the conductive structure body 401 is provided with a third annular protrusion 406 corresponding to the third annular groove and embedded in the third annular groove, so that the stability of the connection among the first cover 402, the diaphragm 405 and the conductive structure body 401 can be ensured.

Still further, the inner holes and the outer diameters at two ends of the conductive structure body 401 are designed according to the standard luer taper, specifically, the outer surfaces at two ends of the conductive structure body 401 are respectively provided with annular first step positions which can be inserted in the pipeline, and the inner walls at two ends of the conductive structure body 401 are respectively provided with annular second step positions which can be inserted in the pipeline, so that the force conductive structure can be inserted in the pipeline, can be externally connected with the pipeline, even be directly connected with an accessory, and is convenient to use and strong in general matching.

In this embodiment, the first female needle base branch pipeline and the second female needle base 8 branch pipeline have the same structure and include a second hose 14, a first female needle base 6, a first female needle base cover 7 and a first hemostatic clip 5, one end of the second hose 14 is connected with the branch interface, the other end of the second hose 14 is connected with one end of the first female needle base 6, and the first female needle base cover 7 is connected with the other end of the first female needle base 6. The second female needle based branch line structure includes an eleventh hose 34, a fourth female needle base 26, a second female needle base cover 25, and a third hemostatic clip 27.

Referring to fig. 6, in this embodiment, the first hemostatic clip 5, the second hemostatic clip 10, the third hemostatic clip 27 and the fourth hemostatic clip 28 have the same structure, and the first hemostatic clip 5 includes a first clip arm 505, a connecting arm 507 and a second clip arm 510, one end of the first clip arm 505 is connected with the first end of the second clip arm 510 through the connecting arm 507, the upper portion of the second clip arm 510 is bent towards the first clip arm 505 and forms a bent section 501 opposite to the connecting arm 507, the other end of the first clip arm 505 is provided with a guiding part 503 extending towards the inner side, the outer surface of the connecting part 503 and the first clip arm 505 is provided with a second clamping groove 504, the other end of the second clip arm 510 is provided with a second clip 512 extending towards the inner side and being capable of being clamped in the second clamping groove 504, the bent section 501 is provided with a guiding hole 511 corresponding to the guiding part 503, and when the second clip 512 is clamped in the second clip arm 508 is provided with a guiding part 511, the guiding part 503 is provided with a guiding part 503 which is opposite to the inner wall of the second clip arm 505 and is provided with a guiding part 510 which is provided with a guiding part which is opposite to the second clip arm 506; specifically, through increasing guide structure in the hemostatic clip, only when guide part 503 correctly inserts guiding hole 511, hemostatic clip's second buckle 512 just can the joint to second draw-in groove 504, and then realize hemostatic clip's closed clamp, when hemostatic clip is inclined to one side, in the guide hole 511 of hemostatic clip can't get into hemostatic clip to guide part 503, hemostatic clip can't buckle, leads to hemostatic clip to pop out, avoids appearing hemostatic clip and presss from both sides partially, leads to the pipeline to leak blood phenomenon. Specifically, when the pipe needs to be clamped, the pipe sequentially passes through the first through hole 508, between the first clamping part 506 and the second clamping part 509, and between the guide hole 511, and when the hemostatic clamp is closed and clamped, the first clamping part 506 and the second clamping part 509 clamp the pipe between the first clamping part 506 and the second clamping part 509.

Further, in order to facilitate the opening of the hemostatic clamp, in this embodiment, the end of the second clamping arm 510 near one end of the second buckle 512 is provided with a first handle 502 bent away from one side of the second buckle 512, and when the hemostatic clamp needs to be opened, the hemostatic clamp can be opened only by breaking the first handle 502 off.

In this embodiment, the guide portion 503 and the first clamping arm 505 are disposed at an acute angle, so that the guide portion 503 is convenient to enter the guide slot, preferably, the width of the guide portion 503 is the same as the width of the guide hole 511, so that the second buckle 512 of the hemostatic clamp can be clamped to the second clamping slot 504 only when the guide portion 503 is correctly inserted into the guide hole 511, and further, the hemostatic clamp is clamped tightly, when the hemostatic clamp is biased, the guide portion 503 cannot enter the guide hole 511 of the hemostatic clamp, and the hemostatic clamp cannot be buckled, so that the hemostatic clamp is sprung open. And so set up can realize controlling the spacing to the hemostatic clamp, when second buckle 512 card goes into second draw-in groove 504, first arm lock 505 can not be for second arm lock 510 skew about, further guarantees the accuracy of centre gripping.

In this embodiment, the first clamping portion 506 and the second clamping portion 509 are each a protrusion having a V-shaped cross section. When the second buckle 512 is engaged in the second slot 504, the first clamping portion 506 contacts the second clamping portion 509. The connecting arm 507 is an elastic hinge or the first clamping arm 505, the connecting arm 507 and the second clamping arm 510 are integrally formed. The outer surface of the first clamping arm 505 is provided with anti-slip patterns, so that the first clamping arm is convenient to take. The guide hole 511 is a bar-shaped hole provided along the length direction of the bending section 501.

Referring to fig. 11, in this embodiment, the arterial dialysis line further includes a first flushing connector 12, the venous dialysis line further includes a second flushing connector 30, the first flushing connector 12 includes a second cover 1201 and a flushing connector body 1205 having a hollow cylindrical shape, two ends of the flushing connector body 1205 are respectively defined as a first connection end and a second connection end, the second cover 1201 is in snap connection with the first connection end, a side wall of the flushing connector body 1205 is connected with an overhanging bracket 1203, an end of the overhanging bracket 1203 is flush with an end of the first connection end of the flushing connector body 1205, an outer wall of the second cover 1201 is rotatably connected with an end of the overhanging bracket 1203 through a connecting piece, the second cover 1201 is rotatable to a first connection end of the flushing connector body 1205, a second handle 1202 extending outwards and being perpendicular to an upper end surface of the second cover 1201 is provided on the connecting piece, and the second connection end is detachably connected with the puncture path connection connector. Specifically, in this embodiment, the second cover 1201 is connected to the first connection end of the flush joint body 1205 by a snap fit, so as to ensure the stability of the connection between the second cover 1201 and the flush joint body 1205; by providing the outrigger 1203 and the second handle 1202, thereby lengthening the arm of force, the force of opening the second lid 1201 can be reduced according to the pythagorean theorem.

In this embodiment, the outrigger 1203 includes a connecting plate parallel to the axis of the flush joint body 1205 and spaced from the outer wall of the flush joint body 1205, the upper end of the connecting plate is flush with the end of the first connecting end of the flush joint body 1205, and the outer wall of the second cover 1201 is rotatably connected with the upper end of the connecting plate through a connecting piece. In addition, the connection of the outrigger 1203 to the side wall of the flush joint body 1205 is provided with a stiffener 1204. Thus, the strength of the structure of the outrigger 1203 can be ensured, and the service life of the flushing joint can be prolonged.

Further, a cylindrical plunger 1207 is disposed in the second cover 1201, the plunger 1207 is coaxially disposed with the second cover 1201, and an outer diameter of the plunger 1207 is the same as an inner diameter of the flush joint body 1205, so as to seal the inside of the flush joint body 1205. As shown in fig. 2, the plunger 1207 is in a hollow cylinder shape, one end of the plunger 1207 is connected to the inner end surface of the second cover 1201, and the other end of the plunger 1207 is provided with an inclined surface and can be inserted into the flush joint body 1205, so as to facilitate the closing of the second cover 1201.

Preferably, in this embodiment, the outer wall of the first connection end is provided with a first buckle 1206 protruding outwards, the inner wall of the second cover body 1201 is provided with a first clamping groove 1208 corresponding to the first buckle 1206, the flushing connector body 1205 can be connected with the first clamping groove 1208 of the second cover body 1201 through the first buckle 1206 in a buckling manner, and the number of the first buckles 1206 is 2,2 the first buckles 1206 are oppositely arranged on the outer wall of the flushing connector body 1205, so that no whole circle of threads are required, materials at non-critical positions are reduced, product materials are reduced, and cost is saved. The outer wall of second link is equipped with the second buckle 512 of outside bellied, the quantity of second buckle 512 is 2, so, can conveniently wash the joint and be connected with hemodialysis extracorporeal circulation pipeline.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.

Claims

1. The extracorporeal hemodialysis system is characterized by comprising a dialyzer, an arterial dialysis pipeline and a venous dialysis pipeline, wherein the arterial dialysis pipeline comprises a first dialysis joint, a first pressure sensor, a sampling joint, a first puncture needle tube way connecting joint, a second hemostatic clamp, a first mother needle base branch pipeline, a sixth hose and a seventh hose, wherein the first dialysis joint is connected with the liquid inlet end of the first pressure sensor through the pipeline, the liquid outlet end of the first pressure sensor is connected with the liquid inlet end of the sampling joint through the sixth hose, the liquid outlet end of the sampling joint is connected with the first puncture needle tube way connecting joint through the seventh hose, the second hemostatic clamp is arranged on the seventh hose, a branch interface is arranged on the pipeline between the first dialysis joint and the first pressure sensor, and the first mother needle base branch pipeline is connected with the branch interface;

the venous dialysis pipeline comprises a second dialysis joint, a second pressure sensor, a venous drip chamber, a third hemostatic clamp, a second puncture needle pipeline connecting joint, a tenth hose, a twelfth hose and a second female needle-based branch pipeline, wherein the second dialysis joint is used for detecting the liquid pressure in the pipeline, a liquid outlet of the second dialysis joint is connected with a liquid inlet of the second pressure sensor, a liquid outlet of the second pressure sensor is connected with a liquid inlet of the venous drip chamber through the tenth hose, a liquid outlet of the venous drip chamber is connected with the second puncture needle pipeline connecting joint through the twelfth hose, a first branch pipe interface is arranged at the upper end of the venous drip chamber, a liquid outlet end of the second female needle-based branch pipeline is connected with the first branch pipe interface, and the third hemostatic clamp is arranged on the twelfth hose; the arterial dialysis pipeline is connected with the dialyzer through the first dialysis connector, and the venous dialysis pipeline is connected with the dialyzer through the second dialysis connector;

the sampling connector comprises a hollow tubular sampling connector body and a silica gel plug, wherein the outer wall of the sampling connector body is provided with a fixing groove for fixing the silica gel plug, the bottom of the fixing groove is provided with a sampling hole communicated with the inside of the sampling connector body, the silica gel plug is embedded in the fixing groove and is in sealing connection with the fixing groove, the surface of the silica gel plug is provided with a sampling seam, the sampling seam can be communicated with the sampling hole, the liquid outlet end of the pressure sensor is connected with the liquid inlet end of the sampling connector body through a sixth hose, and the liquid outlet end of the sampling connector body is connected with the puncture needle tube way connecting connector through a seventh hose;

the structure of the first pressure sensor and the structure of the second pressure sensor are the same and respectively comprise a pressure conduction structure and a pressure sensing device, the pressure conduction structure comprises a hollow tubular conduction structure body, a diaphragm, a first cover body and a conduit, wherein the conduction structure body is connected with a pipeline, the side wall of the conduction structure body is provided with an opening, the first cover body is in sealing connection with the side wall of the conduction structure body, the opening is positioned in the first cover body, the diaphragm is arranged between the conduction structure body and the first cover body and in sealing connection with the opening, the diaphragm and the first cover body are arranged at intervals, a pressure cavity is formed between the diaphragm and the first cover body, the lower end of the conduit is inserted into the first cover body and is communicated with the pressure cavity, and the upper end of the conduit is connected with the pressure sensing device;

the membrane is arranged to bulge towards the inside of the conductive structure body; the first cover body comprises an arc-shaped surface which is arranged back to the membrane; the conductive structure body is provided with a curved surface section which has the same shape as the membrane and bulges towards the outer side, and the curved surface section is arranged opposite to the opening;

the first female needle base branch pipeline and the second female needle base branch pipeline have the same structure, the first female needle base branch pipeline comprises a second hose, a first female needle base, a female needle base cover and a first hemostatic clamp, one end of the second hose is connected with the branch interface, the other end of the second hose is connected with one end of the first female needle base, and the female needle base cover is connected with the other end of the first female needle base;

the first hemostatic clamp has the same structure as the second hemostatic clamp and comprises a first clamp arm, a connecting arm and a second clamp arm, one end of the first clamp arm is connected with the first end of the second clamp arm through the connecting arm, the upper part of the second clamp arm is bent towards the first clamp arm and forms a bending section which is opposite to the connecting arm, the other end of the first clamp arm is provided with a guide part which extends inwards, the outer surface of the joint of the guide part and the first clamp arm is provided with a second clamping groove, the other end of the second clamp arm is provided with a second buckle which extends inwards and can be clamped in the second clamping groove, the bending section is provided with a guide hole corresponding to the guide part, when the second buckle is clamped in the second clamping groove, the guide part is positioned in the guide hole, the connecting arm is provided with a first through hole which is opposite to the guide hole and can be penetrated by a pipeline, the inner wall of the first clamp arm is provided with a first clamping part which is opposite to the first clamp arm, and the inner wall of the first clamp arm is provided with a bulge which is opposite to the first clamp arm; the end part of the second clamping arm, which is close to one end of the second buckle, is provided with a first handle bent back to one side of the second buckle.

2. The extracorporeal hemodialysis system of claim 1, wherein the sampling connector further comprises a sampling cover, the lower end of the sampling cover is in sealing connection with the upper end face of the fixing groove, the upper end and the lower end of the silica gel pad are respectively abutted against the lower end face of the sampling cover and the upper end face of the fixing groove, a second through hole for inserting the head of the injector is formed in the sampling cover, and the second through hole can be communicated with the sampling hole through the sampling slit.

3. The extracorporeal hemodialysis system of claim 1, wherein the venous drip chamber comprises a drip chamber body, a blood inlet and a blood outlet are respectively provided at an upper end and a lower end of the drip chamber body, a liquid inlet channel is provided at an upper portion of an inner wall of the drip chamber body, an upper end of the liquid inlet channel is connected with the blood inlet, a lower end of the liquid inlet channel is closed, and an opening is provided at a side wall of the liquid inlet channel.

4. The extracorporeal hemodialysis system of claim 3, wherein the blood outlet is provided with a cylindrical filter screen, the lower end of the drip chamber body is provided with a liquid outlet channel, the upper end of the liquid outlet channel is the blood outlet, the lower end of the filter screen is fixed in the liquid outlet channel, the inner wall of the upper part of the liquid outlet channel is provided with an annular limiting protrusion which extends inwards and can prevent the lower end of the filter screen from entering the drip chamber body, the side wall of the lower end of the filter screen is provided with an annular limiting groove corresponding to the annular limiting protrusion, and the filter screen is fixed in the annular limiting protrusion of the liquid outlet channel through the annular limiting groove.

5. The extracorporeal hemodialysis system of any one of claims 1-4, wherein the arterial dialysis line further comprises a first flush joint, the venous dialysis line further comprises a second flush joint, the first flush joint comprises a second cover and a flush joint body in a hollow cylindrical shape, two ends of the flush joint body are respectively defined as a first connection end and a second connection end, the second cover is in snap connection with the first connection end, the side wall of the flush joint body is connected with an overhanging bracket, the end of the overhanging bracket is flush with the end of the first connection end of the flush joint body, the outer wall of the second cover is rotatably connected with the end of the overhanging bracket through a connecting piece, the second cover is rotatable to be connected with the first connection end of the flush joint body, a second handle which extends outwards and is perpendicular to the upper end face of the second cover is arranged on the connecting piece, and the second connection end is detachably connected with the needle tube connection joint.