CN109498874B - Extracorporeal circulation pipeline for venous hemodialysis - Google Patents
Extracorporeal circulation pipeline for venous hemodialysis Download PDFInfo
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- CN109498874B CN109498874B CN201811602510.0A CN201811602510A CN109498874B CN 109498874 B CN109498874 B CN 109498874B CN 201811602510 A CN201811602510 A CN 201811602510A CN 109498874 B CN109498874 B CN 109498874B
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- Prior art keywords
- clamp
- drip chamber
- hose
- liquid outlet
- venous
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- 230000004087 circulation Effects 0.000 title claims abstract description 24
- 238000001631 haemodialysis Methods 0.000 title claims abstract description 23
- 230000000322 hemodialysis Effects 0.000 title claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 68
- 230000002439 hemostatic effect Effects 0.000 claims abstract description 52
- 239000008280 blood Substances 0.000 claims abstract description 34
- 210000004369 blood Anatomy 0.000 claims abstract description 34
- 238000000502 dialysis Methods 0.000 claims abstract description 22
- 239000012528 membrane Substances 0.000 claims description 17
- 238000011010 flushing procedure Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000017531 blood circulation Effects 0.000 abstract description 7
- 238000001514 detection method Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 230000036772 blood pressure Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
- A61M1/3621—Extra-corporeal blood circuits
- A61M1/3639—Blood pressure control, pressure transducers specially adapted therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
- A61M1/16—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis with membranes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/22—Valves or arrangement of valves
- A61M39/28—Clamping means for squeezing flexible tubes, e.g. roller clamps
- A61M39/281—Automatic tube cut-off devices, e.g. squeezing tube on detection of air
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/22—Valves or arrangement of valves
- A61M39/28—Clamping means for squeezing flexible tubes, e.g. roller clamps
- A61M39/286—Wedge clamps, e.g. roller clamps with inclined guides
Abstract
The invention relates to an extracorporeal circulation pipeline for venous hemodialysis, which comprises a dialysis joint, a pressure sensor, a venous drip chamber, a second hemostatic clamp, a puncture needle tube way connecting joint, a third hose, a fifth hose and a female needle base branch pipeline, wherein a liquid outlet of the dialysis joint is connected with a liquid inlet of the pressure sensor, a liquid outlet of the pressure sensor is connected with a liquid inlet of the venous drip chamber through the third hose, a liquid outlet of the venous drip chamber is connected with the puncture needle tube way connecting joint through the fifth hose, a first branch pipe interface is arranged at the upper end of the venous drip chamber, a liquid outlet end of the female needle base branch pipeline is connected with the first branch pipe interface, and the second hemostatic clamp is arranged on the fifth hose. The extracorporeal circulation pipeline for venous hemodialysis provided by the invention can detect the pressure of blood flow in the blood path pipeline, improves the accuracy of detection results, and can prevent the risk of clamping deviation of a hemostatic clamp.
Description
Technical Field
The invention relates to the structural field of extracorporeal circulation pipelines for hemodialysis, in particular to an extracorporeal circulation pipeline for venous hemodialysis.
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.
In the use process of the hemodialysis extracorporeal circulation pipeline, the pressure state in the pipeline needs to be detected, and the pressure sensor can isolate blood and conduct the pressure in the pipeline so as to achieve the purpose of monitoring the pressure in the pipeline. In the prior art, a pressure sensor for detecting blood pressure is not in direct contact with blood, and because the current structure cannot be directly connected in a blood path tube for passing blood, the pressure sensor with the structure is generally connected at the position of a branch pipe at the upper end of a drip chamber and is used for testing the pressure in the cavity of the drip chamber, but not the pressure of blood flowing in the blood path tube, and the error of a detection result is larger. In addition, the pipeline is required to be clamped by closing the hemostatic clamp according to the requirement in the use process, so that the pipeline channel is isolated, the blood loss is prevented, and the blood flow direction is controlled. As shown in fig. 1, the hemostatic clamp structure in the prior art is to clamp the hemostatic clamp edge by a whole buckling plane on the hemostatic clamp, and the hemostatic clamp is easy to clamp and deviate due to no limit on the left side and the right side, so that the risk of the pipe body failing to be clamped completely is caused.
Disclosure of Invention
The invention provides an extracorporeal circulation pipeline for venous hemodialysis, which can detect the pressure of blood flow in a blood path pipeline, improve the accuracy of detection results and prevent the risk of clamping deviation of a hemostatic clamp.
In order to achieve the above object, the invention provides an extracorporeal circulation pipeline for venous hemodialysis, which comprises a dialysis joint, a pressure sensor, a venous drip chamber, a second hemostatic clamp, a puncture needle pipe connecting joint, a third hose, a fifth hose and a female needle base branch pipeline, wherein the dialysis joint is used for being connected with a dialyzer, a liquid outlet of the dialysis joint is connected with a liquid inlet of the pressure sensor, the liquid outlet of the pressure sensor is connected with a liquid inlet of the venous drip chamber through the third hose, the liquid outlet of the venous drip chamber is connected with the puncture needle pipe connecting joint through the fifth hose, a first branch pipe interface is arranged at the upper end of the venous drip chamber, a liquid outlet end of the female needle base branch pipeline is connected with the first branch pipe interface, and the second hemostatic clamp is arranged on the fifth hose.
As the preferred scheme, pressure sensor includes pressure conduction structure and pressure sensing device, pressure conduction structure is including being used for with the pipe connection and being cavity 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 forms 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 pressure chamber intercommunication, the upper end of pipe with pressure sensing device is connected, the liquid outlet of dialysis joint with the inlet of conduction structure body is connected, the liquid outlet of conduction structure body with the inlet of venous drip room passes through third hose connection.
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 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 a preferable scheme, the female needle base branch pipeline comprises a fourth hose, a female needle base cover and a first hemostatic clamp, one end of the fourth hose is connected with the first branch pipe interface, the other end of the fourth hose is connected with one end of the female needle base, and the female needle base cover is connected with the other end of the female needle base.
As a preferred scheme, the first hemostatic clamp and the second hemostatic clamp have the same structure and comprise 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 connecting part 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 bending section is provided with a guide hole corresponding to the guide part, when the second clamp buckle is clamped in the second clamping groove, the guide part is positioned in the guide hole, the connecting arm is provided with a 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 clamp arm which is opposite to the first clamp arm, and the inner wall of the first clamp arm is provided with a protrusion part which is opposite to the first clamp arm is arranged on one side of the first clamp arm.
Preferably, 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 a preferred scheme, an extracorporeal circulation pipeline for venous hemodialysis still includes the washing joint, the washing joint includes the second lid and is hollow cylinder form connect the body, will connect the both ends of body to define respectively as first link and second link, the second lid with first link buckle is connected, the lateral wall of connecting the body is connected with the outrigger, the tip of outrigger with the tip parallel and level of the first link of connecting the body, the outer wall of second lid through the connecting piece with the tip rotatable coupling of outrigger just the second lid rotatable to with connect the first link end of body and close, be equipped with outward extension and with the second handle that the up end of second lid set up perpendicularly on the connecting piece, the second link with puncture needle tubing way attach fitting can dismantle and be connected.
Preferably, the extracorporeal circulation circuit for venous hemodialysis further comprises a dialysis connector cover detachably connected to the dialysis connector.
According to the extracorporeal circulation pipeline for venous hemodialysis provided by the technical scheme, the diaphragm is arranged at the opening of the side wall of the conduction structure body to be in direct contact with blood, when blood flows, due to the change of pressure, positive pressure or negative pressure is applied, the pressure conduction film is used for vertically driving the pressure cavity, the air volume in the pressure cavity is expanded or compressed to conduct pressure, the guide pipe is connected with the pressure sensing device, so that the pressure is conducted, and accurate detection of the pressure is facilitated. In addition, through increasing guide structure in the hemostatic clamp, only when the guide part correctly inserts the guiding hole, the second buckle of hemostatic clamp can the joint to the second draw-in groove, and then realizes the closed clamp of hemostatic clamp, when hemostatic clamp press from both sides the off-set time, the guide part can't get into in the guiding hole of hemostatic clamp, and hemostatic clamp can't buckle, leads to hemostatic clamp to pop out, avoids appearing hemostatic clamp to press from both sides off-set, leads to the pipeline to leak blood phenomenon.
Drawings
FIG. 1 is a schematic view of a prior art hemostatic clip;
FIG. 2 is a schematic diagram of the structure of the present invention;
FIG. 3 is a schematic view of a first hemostatic clip;
FIG. 4 is a cross-sectional view of the internal structure of the pressure conducting structure;
FIG. 5 is an enlarged view of a portion of the junction of the cover and the conductive structure body;
FIG. 6 is a schematic structural view of a pressure conducting structure;
FIG. 7 is a schematic structural diagram of a pressure-conducting structure (II);
FIG. 8 is a structural cross-sectional view of the drip chamber body;
FIG. 9 is an enlarged view of a portion of FIG. 8 at A;
fig. 10 is a schematic structural view of the flush joint.
Wherein: 1. a dialysis connector cap; 2. dialysis joint; 3. a pressure conducting structure; 4. a venous drip chamber; 5. a first female needle base; 6. a second female needle base cover; 7. a second female needle base; 8. a first hemostatic clip; 9. a second hemostatic clip; 10. a puncture needle tube way connecting joint; 11. flushing the joint; 12. a first hose; 13. a second hose; 14. a third hose; 15. a fourth hose; 16. a fifth hose;
301. a conductive structural body; 302. a first cover; 303. a conduit; 304. an arc surface; 305. a membrane; 306. a third annular projection; 307. a first annular projection; 308. a first annular groove; 309. a second annular projection;
401. a liquid outlet channel; 402. a drip chamber body; 403. a blood inlet; 404. a first branch pipe interface; 405. a filter screen; 406. a liquid inlet channel; 407. an opening; 408. an annular limit groove; 409. annular limiting protrusions;
801. a bending section; 802. a first handle; 803. a guide part; 804. a second clamping groove; 805. a first clamp arm; 806. a first clamping part; 807. a connecting arm; 808. a through hole; 809. a second clamping portion; 810. a second clamp arm; 811. a guide hole; 812. a second buckle;
1101. a second cover; 1102. a second handle; 1103. an outrigger; 1104. reinforcing ribs; 1105. a joint body; 1106. a first buckle; 1107. a plunger; 1108. a first clamping groove.
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. 2-10, the extracorporeal circulation line for venous hemodialysis provided by the invention comprises a dialysis connector 2 for being connected with a dialyzer, a pressure sensor for detecting the liquid pressure in the line, a venous drip chamber 4, a second hemostatic clip 9, a puncture needle tube connecting connector 10, a third hose 14, a fifth hose 16, a female needle base branch line and a dialysis connector cover 1, wherein a liquid outlet of the dialysis connector 2 is connected with a liquid inlet of the pressure sensor, a liquid outlet of the pressure sensor is connected with a liquid inlet of the venous drip chamber 4 through the third hose 14, a liquid outlet of the venous drip chamber 4 is connected with the puncture needle tube connecting connector 10 through the fifth hose 16, a first branch tube connector 404 is arranged at the upper end of the venous drip chamber 4, a liquid outlet end of the female needle base branch line is connected with the first branch tube connector 404, and the second hemostatic clip 9 is arranged on the fifth hose 16.
Specifically, please refer to fig. 4-7, which are schematic structural diagrams of the pressure sensor provided in this embodiment, the pressure sensor includes a pressure conducting structure 3 and a pressure sensing device, the pressure conducting structure 3 includes a conducting structure body 301, a membrane 305, a first cover 302 and a conduit 303, the conducting structure body 301 is provided with an opening on a side wall, the first cover 302 is sealingly connected with the conducting structure body 301 side wall, the opening is located in the first cover 302, the membrane 305 is disposed between the conducting structure body 301 and the first cover 302 and sealingly connected with the opening, the membrane 305 is disposed at a distance from the first cover 302 and forms a pressure chamber between the membrane 305 and the first cover 302, the lower end of the conduit 303 is inserted into the first cover 302 and communicates with the pressure chamber, the upper end of the conduit 303 is connected with the pressure sensing device, the liquid outlet of the dialysis connector 2 is sealingly connected with the liquid inlet of the conducting structure body 301, the liquid outlet of the dialysis connector 2 is sealingly connected with the first hose 301, and the liquid outlet of the needle is connected with the first hose 13 through the first hose and the first hose 13. Specifically, the membrane 305 is disposed at the opening of the side wall of the conductive structure body 301 to directly contact with blood, when blood flows, due to the pressure change, the positive pressure or negative pressure is applied, the pressure conductive membrane is used for vertically expanding the pressure cavity, expanding or compressing the air volume in the pressure cavity to conduct pressure, and the conduit 303 is connected with the pressure sensing device, so that the pressure is conducted, and accurate detection of the pressure is facilitated. In addition, the lower end of the conduit 303 is inserted into the first cover 302, so that the conduit 303 extends into the pressure cavity, and when the diaphragm 305 is completely blown up towards the first cover 302, the diaphragm can be propped against the upper surface of the pressure cavity, so that the pressure cavity cannot be completely stuck to the upper surface of the pressure cavity, the pressure cavity is prevented from being completely inflated, the volume in the pressure cavity is not changed, and the pressure cannot be transmitted.
In this embodiment, the membrane 305 bulges towards the inside of the conductive structure body 301, the first cover 302 includes an arc surface 304 opposite to the membrane 305, the conductive structure body 301 is provided with a curved surface section with the same shape as the membrane 305 and bulges towards the outside, and the curved surface section is opposite to the opening, so that it can be ensured that blood between the membrane 305 and the inner wall of the conductive structure body 301 can always flow normally without blocking.
Further, the outer edge of the diaphragm 305 is fixedly disposed at the connection between the first cover 302 and the conductive structure body 301, the outer edge of the diaphragm 305 is bent upwards to form a first annular groove 308, the lower end surface of the first cover 302 is provided with a first annular protrusion 307 corresponding to the first annular groove 308 and embedded in the first annular groove 308, the outer surface of the conductive structure body 301 is provided with a second annular groove, the lower end surface of the first cover 302 is provided with a second annular protrusion 309 corresponding to the second annular groove and embedded in the second annular groove, the lower end surface of the diaphragm 305 is provided with a third annular groove, and the outer surface of the conductive structure body 301 is provided with a third annular protrusion 306 corresponding to the third annular groove and embedded in the third annular groove, so that the stability of the connection among the first cover 302, the diaphragm 305 and the conductive structure body 301 can be ensured.
Still further, the inner holes and the outer diameters at two ends of the conductive structure body 301 are designed according to the standard luer taper, specifically, the outer surfaces at two ends of the conductive structure body 301 are respectively provided with annular first step positions which can be inserted into the pipeline, and the inner walls at two ends of the conductive structure body 301 are respectively provided with annular second step positions which can be inserted into the pipeline, so that the force conductive structure can be inserted into the pipeline, can be externally connected with the pipeline, even be directly connected with an external fitting, and is convenient to use and strong in general matching.
Referring to fig. 8-9, a schematic structural diagram of a venous drip chamber 4 provided in this embodiment is shown, the venous drip chamber 4 includes a drip chamber body 402, a blood inlet 403 and a blood outlet are respectively disposed at an upper end and a lower end of the drip chamber body 402, a liquid inlet channel 406 is disposed at an upper portion of an inner wall of the drip chamber body 402, an upper end of the liquid inlet channel 406 is connected with the blood inlet 403, a lower end of the liquid inlet channel 406 is closed, and an opening 407 is disposed on a side wall of the liquid inlet channel 406. Specifically, by providing the liquid inlet channel 406 as a turning structure in the drip chamber body 402, blood enters from the upper end of the liquid inlet channel 406 and flows out from the side portion of the lower end of the liquid inlet channel 406, and needs to turn in the liquid inlet channel 406 and drop into the drip chamber body 402, so that the impact force during blood flow is reduced, and the coagulation risk is reduced.
Further, the blood outlet is provided with a filter screen 405, preferably, the filter screen 405 is cylindrical, the lower end of the drip chamber body 402 is provided with a liquid outlet channel 401, the upper end of the liquid outlet channel 401 is the blood outlet, and the lower end of the filter screen 405 is fixed in the liquid outlet channel 401. For filtering blood, it is further preferable that the inner wall of the upper portion of the liquid outlet channel 401 is provided with an annular limiting protrusion 409 extending inward and capable of blocking the lower end of the filter screen 405 from entering the drip chamber body 402, the side wall of the lower end of the filter screen 405 is provided with an annular limiting groove 408 corresponding to the annular limiting protrusion 409, and the filter screen is fixed at the annular limiting protrusion 409 of the liquid outlet channel 401 through the annular limiting groove 408. So, filter screen 405 gets into the inside of drip chamber from the outdoor equipment of drip, and it is fixed and spacing with filter screen 405 through the spacing protruding 409 of annular on the upper portion of drain passageway 401, and filter screen 405's lower extreme can't pass the spacing protruding 409 of annular and get into the inside of drip chamber, so, can effectually prevent filter screen 405 to drop and get into the drip chamber, reduce the risk that filter screen 405 drops.
Further, a first branch pipe connector 404 for connecting with a female needle base branch pipe is further provided at the upper end of the drip chamber body 402, and a female needle base branch pipe is connected to the first branch pipe connector 404. Specifically, the female needle base branch pipeline includes fourth hose 15, the female needle base 7 of second, female needle base lid 6 of second and first hemostatic clamp 8, the one end of fourth hose 15 with first branch pipe interface 404 is connected, the other end of fourth hose 15 with female needle base's one end is connected, female needle base lid with female needle base's the other end is connected.
Referring to fig. 3, a schematic structural view of the first hemostatic clamp 8 provided in this embodiment is shown, the first hemostatic clamp 8 has the same structure as the second hemostatic clamp 9 and includes a first clamp arm 805, a connecting arm 807 and a second clamp arm 810, one end of the first clamp arm 805 is connected to the first end of the second clamp arm 810 through the connecting arm 807, an upper portion of the second clamp arm 810 is bent towards the first clamp arm 805 and forms a bent section 801 opposite to the connecting arm 807, the other end of the first clamp arm 805 is provided with a guiding portion 803 extending towards the inner side, the outer surface of the connecting portion of the guiding portion 803 and the first clamp arm 805 is provided with a second clamping groove 804, the other end of the second clamp arm 810 is provided with a second buckle 812 extending towards the inner side and being capable of being clamped in the second clamping groove 804, the bent section 801 is provided with a guiding hole 811 corresponding to the guiding portion 803, when the second buckle is clamped in the second clamping groove 804, the guiding portion is provided with a guiding hole 809 corresponding to the guiding hole 803 is provided with a guiding hole 811 arranged towards the inner side of the second clamp arm 803, and the guiding hole 810 is provided with a guiding hole 811 is provided opposite to the first clamping hole 803. Specifically, through increasing guide structure in the hemostatic clip, only when guide 803 correctly inserts guiding hole 811, hemostatic clip's second buckle 812 just can the joint to second draw-in groove 804, and then realizes hemostatic clip's closed clamp, and when hemostatic clip pressed from both sides partially, guide 803 can't get into hemostatic clip's guiding hole 811 in, and hemostatic clip can't buckle, leads to hemostatic clip to pop out, avoids appearing hemostatic clip to press 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 through hole 808, the first clamping portion 806 and the second clamping portion 809 and the guide hole 811, and when the hemostatic clamp is closed and clamped, the first clamping portion 806 and the second clamping portion 809 clamp the pipe between the first clamping portion 806 and the second clamping portion 809.
Further, in order to facilitate the opening of the hemostatic clamp, in this embodiment, the end of the second clamping arm 810 near one end of the second buckle 812 is provided with a first handle 802 bent away from one side of the second buckle 812, and when the hemostatic clamp needs to be opened, the hemostatic clamp can be opened only by breaking the first handle 802.
In this embodiment, the guide portion 803 and the first clamping arm 805 are disposed at an acute angle, so that the guide portion 803 is convenient to enter the guide groove, preferably, the width of the guide portion 803 is the same as that of the guide hole 811, so that the second buckle 812 of the hemostatic clip can be clamped to the second clamping groove 804 only when the guide portion 803 is correctly inserted into the guide hole 811, and further, the hemostatic clip can be clamped tightly. And the setting can realize controlling the spacing to the hemostatic clamp like this, when second buckle 812 card goes into second draw-in groove 804, first arm lock 805 can not be for second arm lock 810 left and right skew, further guarantees the accuracy of centre gripping.
In addition, in this embodiment, the first clamping portion 806 and the second clamping portion 809 are each protrusions with V-shaped cross sections. When the second buckle 812 is engaged in the second slot 804, the first clamping portion 806 contacts the second clamping portion 809. The connecting arm 807 is an elastic hinge or the first clamping arm 805, the connecting arm 807 and the second clamping arm 810 are integrally formed. The outer surface of the first clamping arm 805 is provided with anti-skid patterns, so that the first clamping arm can be taken out conveniently. The guide hole 811 is a bar-shaped hole provided along the length direction of the bent section 801.
Referring to fig. 10, the extracorporeal circulation line for venous hemodialysis further includes a flushing connector 11, where the flushing connector 11 includes a second cover 1101 and a hollow cylindrical connector body 1105, two ends of the connector body 1105 are respectively defined as a first connection end and a second connection end, the second cover 1101 is in snap connection with the first connection end, the side wall of the connector body 1105 is connected with an outrigger 1103, an end of the outrigger 1103 is flush with an end of the first connection end of the connector body 1105, an outer wall of the second cover 1101 is rotatably connected with an end of the outrigger 1103 by a connector, and the second cover 1101 is rotatable to close the first connection end of the connector body 1105, a second handle 1102 extending outwards and being perpendicular to an upper end face of the second cover 1101 is provided on the connector, and the second connection end is detachably connected with the puncture needle tube connecting connector 10. Specifically, the second cover 1101 is in snap connection with the first connection end of the joint body 1105, so that the stability of the connection between the second cover 1101 and the joint body 1105 is ensured; by providing the outrigger 1103 and the second handle 1102, thereby lengthening the arm of force, the force of opening the second cover 1101 can be reduced according to the pythagorean theorem.
In this embodiment, the outrigger 1103 includes a connecting plate parallel to the axis of the joint body 1105 and spaced from the outer wall of the joint body 1105, the upper end of the connecting plate is flush with the end of the first connecting end of the joint body 1105, and the outer wall of the second cover 1101 is rotatably connected to the upper end of the connecting plate by a connecting member. In addition, the outrigger 1103 is provided with a stiffener 1104 at the connection with the side wall of the joint body 1105. In this way, the strength of the outrigger 1103 structure can be ensured, improving the service life of the flush joint 11.
Further, a cylindrical plunger 1107 is disposed in the second cover 1101, the plunger 1107 is coaxially disposed with the second cover 1101, and an outer diameter of the plunger 1107 is the same as an inner diameter of the joint body 1105, so as to seal the interior of the joint body 1105. The plunger 1107 is in a hollow cylinder shape, one end of the plunger 1107 is connected to the inner side end surface of the second cover 1101, and the other end of the plunger 1107 is provided with an inclined surface and can be inserted into the joint body 1105, so that the second cover 1101 is conveniently covered.
Preferably, in this embodiment, the outer wall of the first connection end is provided with a first buckle 1106 protruding outwards, the inner wall of the second cover 1101 is provided with a first clamping groove 1108 corresponding to the first buckle 1106, the connector body 1105 can be in buckled connection with the first clamping groove 1108 of the second cover 1101 through the first buckle 1106, and the number of the first buckles 1106 is 2,2 the first buckles 1106 are oppositely arranged on the outer wall of the connector body 1105, 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 the second connecting end is provided with second buckles 812 protruding outwards, and the number of the second buckles 812 is 2, so that the flushing connector 11 can be conveniently connected with the 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 (6)
1. The extracorporeal circulation pipeline for venous hemodialysis is characterized by comprising a dialysis joint, a pressure sensor, a venous drip chamber, a second hemostatic clamp, a puncture needle tube way connecting joint, a third hose, a fifth hose and a female needle base branch pipeline, wherein the dialysis joint is used for being connected with a dialyzer, a liquid outlet of the dialysis joint is connected with a liquid inlet of the pressure sensor, a liquid outlet of the pressure sensor is connected with a liquid inlet of the venous drip chamber through the third hose, a liquid outlet of the venous drip chamber is connected with the puncture needle tube way connecting joint through the fifth hose, a first branch pipe interface is arranged at the upper end of the venous drip chamber, a liquid outlet end of the female needle base branch pipeline is connected with the first branch pipe interface, and the second hemostatic clamp is arranged on the fifth hose;
the pressure sensor comprises a pressure conduction structure and a pressure sensing device, the pressure conduction structure comprises a conduction structure body, a diaphragm, a first cover body and a conduit, the conduction structure body is connected with a pipeline and is in a hollow tubular shape, an opening is formed in the side wall of the conduction structure body, 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 is 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, the upper end of the conduit is connected with the pressure sensing device, a liquid outlet of the dialysis connector is connected with a liquid inlet of the conduction structure body, and a liquid outlet of the conduction structure body is connected with a liquid inlet of the venous drip chamber through a third hose;
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 female needle base branch pipeline comprises a fourth hose, a female needle base cover and a first hemostatic clamp, one end of the fourth hose is connected with the first branch pipe interface, the other end of the fourth hose is connected with one end of the female needle base, and the female needle base cover is connected with the other end of the female needle base;
the first hemostatic clamp is the same as the second hemostatic clamp in structure 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 portion of the second clamp arm faces to the first clamp arm to be bent and form a bent 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 connecting part 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 bent section is provided with a guide hole corresponding to the guide part, when the second clamp buckle is clamped in the second clamping groove, the guide part is positioned in the guide hole, the connecting arm is provided with a 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 protrusion which faces to the first clamp arm and is opposite to the first clamp arm, and the inner wall of the first clamp arm is provided with a protrusion which faces to the first clamp arm.
2. The extracorporeal circulation line for venous hemodialysis according to 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.
3. The extracorporeal circulation line for venous hemodialysis according to claim 2, wherein a cylindrical filter screen is provided at the blood outlet, a liquid outlet is provided at the lower end of the drip chamber body, the upper end of the liquid outlet is the blood outlet, the lower end of the filter screen is fixed inside the liquid outlet, an annular limit protrusion extending inward and blocking the lower end of the filter screen from entering the drip chamber body is provided at the inner wall of the upper portion of the liquid outlet, an annular limit groove corresponding to the annular limit protrusion is provided at the side wall of the lower end of the filter screen, and the filter screen is fixed at the annular limit protrusion of the liquid outlet through the annular limit groove.
4. The extracorporeal circulation circuit for venous hemodialysis according to claim 1, wherein an end of the second clamp arm near one end of the second clamp is provided with a first handle bent away from one side of the second clamp.
5. The extracorporeal circulation line for venous hemodialysis according to any one of claims 1 to 4, further comprising a flushing connector, wherein the flushing connector comprises a second cover body and a hollow cylindrical connector body, two ends of the connector body are respectively defined as a first connecting end and a second connecting end, the second cover body is in snap connection with the first connecting end, an overhanging bracket is connected to a side wall of the connector body, an end of the overhanging bracket is flush with an end of the first connecting end of the connector body, an outer wall of the second cover body is rotatably connected with an end of the overhanging bracket through a connector and the second cover body is rotatable to close the first connecting end of the connector body, a second handle which extends outwards and is perpendicular to an upper end face of the second cover body is arranged on the connector, and the second connecting end is detachably connected with the puncture path connecting connector.
6. The extracorporeal circulation circuit for venous hemodialysis according to any one of claims 1-4, further comprising a dialysis adapter cap detachably connected to the dialysis adapter.
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| CN201811602510.0A CN109498874B (en) | 2018-12-26 | 2018-12-26 | Extracorporeal circulation pipeline for venous hemodialysis |
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| CN201811602510.0A CN109498874B (en) | 2018-12-26 | 2018-12-26 | Extracorporeal circulation pipeline for venous hemodialysis |
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