Anti-coagulation double-cavity catheter type hemodialysis instrument

Abstract

The invention relates to the technical field of hemodialysis, in particular to an anti-coagulation double-cavity catheter type hemodialysis instrument which comprises a dialysis machine and a heparin pump arranged on the outer side of the dialysis machine, and the heparin pump comprises a liquid storage bottle, a transmission part arranged in the liquid storage bottle, a pair of parallel pressurizing cylinders and a liquid passing part used for intermittently conveying heparin to the dialysis machine. According to the anti-blood-coagulation double-cavity catheter type hemodialysis instrument, power of a blood pump in the hemodialysis machine can be transmitted through the transmission part, a telescopic plate is driven to move up and down through rotation of a central shaft of the blood pump, a piston plate is driven to move up and down in a pressurizing cylinder, then pressurizing operation in a bottle body is completed, independent driving units are reduced, and the operation efficiency is improved. And the size and the cost of equipment are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of hemodialysis, in particular to an anti-coagulation double-lumen catheter type hemodialyzer. Background Art

[0002] In hemodialysis treatment, coagulation in the extracorporeal circulation circuit is a core risk factor leading to treatment interruption and complications. Traditional anticoagulation regimens rely on heparin pumps to intermittently inject heparin solutions. Heparin solutions inhibit the activity of coagulation factors to prevent blood from coagulating in the extracorporeal circulation circuit and dialyzer.

[0003] The patent with application number CN202323138798.X discloses a double venous pot blood purification pipeline, which includes a first venous pot, the first venous pot is connected to the first inlet pipe and the first outlet pipe respectively at the top and bottom, and also includes a second venous pot; the second venous pot is connected to the second inlet pipe and the second outlet pipe respectively at the top and bottom; the second inlet pipe is connected to the first inlet pipe; the second outlet pipe is connected to the first outlet pipe. When blood coagulation or blockage occurs in the venous pot and blood cannot be returned, the blood purification pathway can be switched to another venous pot through the corresponding tube clamp or one-way valve without replacing the entire pipeline, and hemodialysis treatment can be continued.

[0004] However, existing hemodialysis devices rely on a mechanical combination of a discrete pressure pump and an injection valve to achieve heparin injection, which increases the size and cost of the equipment. The pressurization and injection systems operate independently and cannot be regulated synchronously. In addition, most devices use a post-coagulation passive intervention mode to prevent coagulation in the pipeline by blocking blood reflux, but repeated blocking operations can easily cause mechanical damage to the vascular endothelium, increasing the release of inflammatory factors and the risk of thrombotic complications.

[0005] In view of this, we propose an anti-coagulation double-lumen catheter hemodialysis machine. Summary of the invention

[0006] The object of the present invention is to provide an anti-coagulation double-lumen catheter type hemodialysis instrument to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions: An anti-coagulation double-lumen catheter-type hemodialysis instrument comprises a dialyzer and a heparin pump arranged outside the dialyzer, wherein the heparin pump comprises a liquid storage bottle, a transmission part arranged inside the liquid storage bottle, a pair of parallel pressure cylinders, and a liquid passing part for intermittently delivering heparin to the dialyzer; The transmission part includes a transmission shaft driven to rotate by the blood pump inside the dialysis machine, a telescopic plate that moves up and down as the transmission shaft rotates, and a pressing rod arranged on the bottom surface of the telescopic plate; The pressurizing cylinder includes a cylinder body, a piston plate arranged inside the cylinder body, and an air pipe arranged at the top of the cylinder body, which drives the piston plate to move up and down together with the telescopic plate, and completes the pressurization operation of the liquid storage bottle through the air pipe; The liquid passage part includes a plurality of regularly distributed cross tube bodies, liquid blocking plugs slidably connected to the longitudinal rods of the cross tube bodies, and springs that push the liquid blocking plugs upward by elastic force. The telescopic plate descends to trigger the plurality of liquid blocking plugs to move downward through the pressing rod, so that the heparin liquid can intermittently flow from the cross tube bodies into the dialysis machine, thereby adjusting the dosage of a single heparin liquid injection.

[0008] In the technical solution of the present invention, the liquid storage bottle includes a bottle body with a U-shaped longitudinal cross-section and a horizontal plate fixedly connected to the top of the bottle body by screws, a plurality of regularly distributed liquid outlet holes are opened at the bottom end of the outer wall of the bottle body, and two air inlet holes that pass through the outer wall of the bottle body are opened.

[0009] In the technical solution of the present invention, the upper and lower ends of the transmission shaft are rotatably connected to the bottom surface of the horizontal plate and the top surface of the bottle body respectively, and a bidirectional threaded groove is provided on the outer wall of the transmission shaft to limit the movement range of the telescopic plate. The transverse cross-section of the telescopic plate is I-shaped and is sleeved on the outer side of the bidirectional threaded groove, and the lower pressure rod is clamped and fixed on the bottom surface of the telescopic plate.

[0010] In the technical solution of the present invention, the transmission part also includes a worm coaxially connected to the central axis of the blood pump inside the dialysis machine, a worm wheel meshing with the worm, and an outer frame for providing a rotation range for the worm. The worm wheel is fixedly connected to the outer wall of the transmission shaft by a pin, and the outer frame is fixed to the outer wall of the bottle body by a snap-on connection.

[0011] In the technical solution of the present invention, an air intake valve is provided at the top of the outer wall of the cylinder, and a piston plate is slidably connected to the interior of the cylinder. A connecting rod is clamped and fixed to the end of the telescopic plate on the bottom surface of the piston plate. When the telescopic plate moves up and down, the piston plate is driven to move up and down in the cylinder through the connecting rod, so that external gas can enter the interior of the cylinder through the air intake valve and then be sent to the interior of the bottle through the air pipe.

[0012] In the technical solution of the present invention, a fixing frame is sleeved on the outer side of the cylinder, and the fixing frame is clamped and fixed on the outer wall of the bottle body. An air pipe is clamped on the top surface of the cylinder, and the other end of the air pipe extends to the interior of the bottle body through the air inlet hole. The end of the air pipe is threadedly connected to an air outlet valve.

[0013] In the technical solution of the present invention, the outer ends of several of the cross tube bodies are connected to injection tubes, and the injection tubes include an injection tube body, external tubes with funnel-shaped ends, and a spiral plate arranged on the inner wall of the injection tube body. The inner wall of the injection tube body is provided with a tube wall through hole on the side of the spiral plate close to the blood inlet end. The external tube is funnel-shaped and is integrally formed with the injection tube body, and the spiral plate is adhesively fixed to the inner wall of the injection tube body.

[0014] In the technical solution of the present invention, one end of the cross tube body transverse tube is clamped and fixed to the outside of the liquid outlet, and the other end is clamped and fixed to the outside of the through hole in the tube wall. A slide groove running through the front and back is opened near the top of the cross tube body longitudinal tube.

[0015] In the technical solution of the present invention, round rods are inserted on the front and rear sides of the liquid blocking plug located in the middle, and sleeve rods are sleeved on both ends of the round rods. The sleeve rods are inserted into the top of the liquid blocking plug located on the outside, and the liquid blocking plug is slidably connected to the inside of the longitudinal tube of the cross tube body. A liquid through hole that passes through the left and right is opened inside the liquid blocking plug, and a socket that passes through the front and back for inserting the sleeve rod is opened near the top of the liquid blocking plug.

[0016] In the technical solution of the present invention, the upper and lower ends of the spring are respectively adhered and fixed to the bottom surface of the liquid blocking plug and the bottom tube body of the cross tube body longitudinal tube, and an upward extension rod is clamped and fixed to the top of the liquid blocking plug located in the middle position, and the sleeve rod is slidably connected to the outside of the round rod and a shift block is adhered to its outer wall.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The anti-coagulation double-lumen catheter-type hemodialysis instrument can transmit the power of the blood pump in the dialysis machine through the transmission part, and the rotation of the central axis of the blood pump drives the telescopic plate to move up and down, and drives the piston plate to move up and down inside the pressurizing cylinder, thereby completing the pressurization operation in the bottle body, reducing independent driving units, and reducing the size and cost of the equipment.

[0018] 2. In the anti-coagulation double-lumen catheter-type hemodialysis instrument, while the telescopic plate moves up and down, the downward pressure rod can periodically drive the liquid blocking plug located in the middle to move downward in the cross tube body, thereby realizing intermittent injection of heparin solution, and by adjusting the position of the sleeve rod, while realizing synchronous control of pressurization and injection of medicine, the dosage of a single heparin solution injection is adjusted according to the coagulation index monitored in real time, and by optimizing the heparin pump, the risk of coagulation in the pipeline is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the structure of the heparin pump in the present invention.

[0021] Figure 3 It is a schematic diagram of the structure of the liquid storage bottle in the present invention.

[0022] Figure 4 It is a structural schematic diagram of the transmission part in the present invention.

[0023] Figure 5 It is a schematic diagram of the structure of the transmission shaft in the present invention.

[0024] Figure 6 It is a schematic cross-sectional view of the structure of the pressurizing cylinder in the present invention.

[0025] Figure 7 It is a schematic cross-sectional view of the structure of the liquid injection tube in the present invention.

[0026] Figure 8 It is a schematic cross-sectional view of the structure of the liquid passage in the present invention.

[0027] Fig. 9 It is a schematic structural diagram of the cross tube body in the present invention.

[0028] Fig.10 It is a schematic diagram of the structure of the liquid blocking plug in the present invention.

[0029] Description of reference numerals: 100. Dialysis machine; 200, heparin pump; 210, liquid storage bottle; 211, bottle body; 2110, liquid outlet; 2111, air inlet; 212, horizontal plate; 220, transmission part; 221, transmission shaft; 2210, two-way thread groove; 222, telescopic plate; 223, lower pressure rod; 224, worm; 225, worm wheel; 226, outer cover rack; 230, pressurizing cylinder; 231, cylinder body; 2310, air inlet valve; 232, piston plate; 233, connecting rod; 234, fixing frame; 235, air pipe; 2350, air outlet valve; 240, liquid injection pipe; 241, injection tube body; 2410, tube wall through hole; 242, external tube; 243, spiral plate; 250, liquid passage part; 251, cross tube body; 2510, slide groove; 252, liquid blocking plug; 2520, liquid passage hole; 2521, socket; 253, spring; 254, upward extension rod; 255, round rod; 256, sleeve rod; 257, shift block. DETAILED DESCRIPTION

[0030] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-Figure 10As shown, this embodiment provides a technical solution: The anti-coagulation double-lumen catheter type hemodialyzer comprises a dialyzer 100 and a heparin pump 200 arranged outside the dialyzer 100, wherein the heparin pump 200 comprises a liquid storage bottle 210, a transmission part 220 arranged inside the liquid storage bottle 210, a pair of parallel pressure cylinders 230, and a liquid passing part 250 for intermittently delivering heparin to the dialyzer 100; In this embodiment, Figure 2-Figure 3 As shown, the liquid storage bottle 210 includes a bottle body 211 with a U-shaped longitudinal section and a horizontal plate 212 fixedly connected to the top of the bottle body 211 by screws, a plurality of regularly distributed liquid outlet holes 2110 are provided at the bottom end of the outer wall of the bottle body 211, and two air inlet holes 2111 that pass through the outer wall of the bottle body 211 are provided.

[0032] Furthermore, the bottle body 211 is used to store heparin liquid, and the heparin liquid prevents blood from clotting in the extracorporeal circulation circuit and the dialyzer by inhibiting the activity of coagulation factors. The liquid outlet 2110 is used to discharge the heparin liquid from the interior of the bottle body 211, and the cross plate 212 is used to provide a rotation range for the structure in the transmission part 220.

[0033] In this embodiment, Figure 4-Figure 5 As shown, the transmission part 220 includes a transmission shaft 221 driven to rotate by the blood pump inside the dialysis machine 100 , a telescopic plate 222 that moves up and down as the transmission shaft 221 rotates, and a pressing rod 223 disposed on the bottom surface of the telescopic plate 222 .

[0034] Specifically, the upper and lower ends of the transmission shaft 221 are rotatably connected to the bottom surface of the horizontal plate 212 and the top surface of the bottle body 211 respectively, and a bidirectional threaded groove 2210 is provided on the outer wall of the transmission shaft 221 to limit the movement range of the telescopic plate 222. The transverse cross-section of the telescopic plate 222 is I-shaped and is sleeved on the outer side of the bidirectional threaded groove 2210, and the lower pressure rod 223 is clamped and fixed on the bottom surface of the telescopic plate 222.

[0035] Furthermore, the transmission part 220 also includes a worm 224 coaxially connected to the central axis of the blood pump inside the dialysis machine 100, a worm wheel 225 meshing with the worm 224, and an outer frame 226 for providing a rotation range for the worm 224. The worm wheel 225 is fixedly connected to the outer wall of the transmission shaft 221 by a pin, and the outer frame 226 is fixedly connected to the outer wall of the bottle body 211.

[0036] Furthermore, after the dialysis machine 100 is started, the blood pump inside it rotates to draw blood from the patient's body. At this time, the rotation of the central axis of the blood pump drives the worm 224 in the transmission part 220 to rotate. The worm 224 conflicts with the worm wheel 225 and drives the transmission shaft 221 to rotate, thereby driving the telescopic plate 222 to move back and forth up and down.

[0037] In this embodiment, Figure 6 As shown, the pressurizing cylinder 230 includes a cylinder body 231, a piston plate 232 disposed inside the cylinder body 231, and an air pipe 235 disposed at the top of the cylinder body 231, which drives the piston plate 232 to move up and down together with the telescopic plate 222, and completes the pressurization operation of the liquid storage bottle 210 through the air pipe 235.

[0038] Specifically, an air intake valve 2310 is provided at the top of the outer wall of the cylinder 231, and a piston plate 232 is slidably connected to the interior of the cylinder 231. A connecting rod 233 is clamped and fixed to the end of the telescopic plate 222 on the bottom surface of the piston plate 232. When the telescopic plate 222 moves up and down, the piston plate 232 is driven to move up and down in the cylinder 231 through the connecting rod 233, so that external gas can enter the interior of the cylinder 231 through the air intake valve 2310, and then be delivered to the interior of the bottle body 211 through the air pipe 235.

[0039] Furthermore, a fixing frame 234 is sleeved on the outer side of the cylinder 231, and the fixing frame 234 is clamped and fixed on the outer wall of the bottle body 211. An air pipe 235 is clamped on the top surface of the cylinder 231. The other end of the air pipe 235 extends to the interior of the bottle body 211 through the air inlet hole 2111, and the end of the air pipe 235 is threadedly connected with an air outlet valve 2350.

[0040] Furthermore, during the up and down movement of the telescopic plate 222, the piston plate 232 is driven to move up and down inside the cylinder 231 by the connecting rod 233, and the external gas is filtered by the air inlet valve 2310 and enters the interior of the cylinder 231, and then is sent into the interior of the bottle body 211 through the air pipe 235 and the air outlet valve 2350 at its end, thereby completing the pressurization operation inside the bottle body 211.

[0041] In this embodiment, Figure 7 As shown, the outer ends of the plurality of cross tubes 251 are connected to the injection tubes 240 , which include an injection tube body 241 , an external tube 242 with funnel-shaped ends, and a spiral plate 243 arranged on the inner wall of the injection tube body 241 .

[0042] Specifically, a tube wall through hole 2410 is opened on the inner wall of the injection tube body 241 on the side of the spiral plate 243 close to the blood inlet end, the external tube 242 is funnel-shaped and is integrally formed with the injection tube body 241, and the spiral plate 243 is adhered and fixed to the inner wall of the injection tube body 241.

[0043] Furthermore, when blood enters the injection tube body 241 from the external tube 242 at the rear end, the flow rate slows down, reducing the risk of platelet deposition in the blood, and induces eddy shear when passing through the spiral plate 243. The heparin liquid entering through the through hole 2410 in the tube wall will contact the eddy current of the blood on the spiral plate 243 and mix efficiently. After passing through the external tube 242 at the front end, it enters the dialyzer inside the dialysis machine 100. After dialysis, the blood flows back into the patient's body.

[0044] In this embodiment, Figure 8-Figure 10 As shown, the liquid passage portion 250 includes a number of regularly distributed cross tube bodies 251, a liquid blocking plug 252 slidably connected to the inside of the longitudinal rod of the cross tube body 251, and a spring 253 that pushes the liquid blocking plug 252 upward by elastic force. The telescopic plate 222 descends to trigger the downward movement of the number of liquid blocking plugs 252 through the pressing rod 223, so that the heparin liquid can intermittently flow from the cross tube body 251 into the dialysis machine 100, thereby adjusting the dosage of a single heparin liquid injection.

[0045] Specifically, one end of the horizontal tube of the cross tube body 251 is clamped and fixed to the outside of the liquid outlet 2110, and the other end is clamped and fixed to the outside of the tube wall through hole 2410. A slide groove 2510 that passes through the front and back is opened near the top of the vertical tube of the cross tube body 251.

[0046] Furthermore, round rods 255 are inserted on the front and rear sides of the liquid blocking plug 252 located in the middle, and sleeve rods 256 are sleeved on both ends of the round rod 255. The sleeve rod 256 is inserted into the top of the liquid blocking plug 252 located on the outside, and the liquid blocking plug 252 is slidably connected to the inside of the longitudinal tube of the cross tube body 251. A liquid through hole 2520 that passes through the left and right is opened inside the liquid blocking plug 252, and a socket 2521 that passes through the front and back for inserting the sleeve rod 256 is opened near the top of the liquid blocking plug 252.

[0047] Furthermore, the upper and lower ends of the spring 253 are respectively adhered and fixed to the bottom surface of the liquid blocking plug 252 and the bottom tube body of the longitudinal tube of the cross tube body 251, and the top of the liquid blocking plug 252 located in the middle position is clamped and fixed with an upward extension rod 254, and the sleeve rod 256 is slidably connected to the outside of the round rod 255 and a shift block 257 is adhered to its outer wall.

[0048] Furthermore, the longitudinal tube of the cross tube body 251 is used to provide a sliding range for the liquid blocking plug 252, and the transverse tube of the cross tube body 251 cooperates with the liquid through hole 2520 on the liquid blocking plug 252 to allow the heparin liquid to pass through. When the upper extension rod 254 allows the lower pressure rod 223 to move downward, it can squeeze the liquid blocking plug 252 to move downward in the longitudinal tube of the cross tube body 251. The round rod 255 provides a moving range for the sleeve rod 256. By using the shift block 257 to shift the sleeve rod 256 and insert it into the jack 2521 on the liquid blocking plugs 252 on both sides, several liquid blocking plugs 252 can be moved together to adjust the dosage of a single heparin liquid injection, thereby realizing an integrated anticoagulation system of the heparin pump 200 with automatic injection, efficient mixing and power integration.

[0049] When the anti-coagulation double-lumen catheter type hemodialysis machine of the present invention is used, firstly, the double-lumen catheter pre-buried outside the patient's blood vessels is connected to the pipeline of the dialysis machine 100, and the heparin solution is injected into the bottle body 211 in advance; After the dialysis machine 100 is started, the blood pump inside it rotates to draw blood from the patient. At this time, the rotation of the central axis of the blood pump drives the worm 224 in the transmission part 220 to rotate. The worm 224 contacts the worm wheel 225 and drives the transmission shaft 221 to rotate, thereby driving the telescopic plate 222 to move up and down. When the telescopic plate 222 moves up and down, the piston plate 232 is driven by the connecting rod 233 to move up and down inside the cylinder 231, and the external gas is filtered by the inlet valve 2310 and enters the cylinder 231, and then passes through the air pipe 235 and the outlet valve 2350 at the end thereof, and is sent into the bottle 211, thereby completing the pressurization operation in the bottle 211; In addition, when the telescopic plate 222 moves to the bottom, the downward pressing rod 223 will squeeze the upward extending rod 254, thereby driving the liquid blocking plug 252 located in the middle to move downward in the longitudinal tube of the cross tube body 251, so that the liquid through hole 2520 on the cross tube body 251 is connected with the horizontal tube of the cross tube body 251, and then the heparin liquid in the bottle body 211 flows into the interior of the injection tube body 241 through the tube wall through hole 2410; Next, when the blood enters the injection tube body 241 from the external tube 242 at the rear end, the flow rate slows down, and a vortex is generated on the plate wall when passing through the spiral plate 243. The heparin solution entering through the tube wall through hole 2410 is mixed with the blood after being fully contacted with the vortex of the spiral plate 243, and then enters the dialyzer inside the dialysis machine 100 after passing through the external tube 242 at the front end. After the blood is dialyzed, it flows back into the patient's body. Subsequently, the operator can select whether to increase the injection content of the heparin solution according to the monitoring device on the dialysis machine 100. The operator can use the dial block 257 to drive the sleeve rod 256 to move on the outside of the round rod 255, and insert the end into the socket 2521 on one side of the liquid blocking plug 252. When the middle liquid blocking plug 252 moves, it can also drive the liquid blocking plug 252 on the other side to move, thereby adjusting the dosage of a single heparin solution injection.

[0050] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the specification and its equivalents.

Claims

1. An anti-coagulation double-lumen catheter hemodialysis apparatus, comprising a dialyzer and a heparin pump arranged outside the dialyzer, characterized in that: The heparin pump comprises a liquid storage bottle, a transmission part arranged inside the liquid storage bottle, a pair of pressurizing cylinders arranged in parallel, and a liquid passing part for intermittently delivering heparin to the dialysis machine; The transmission part includes a transmission shaft driven to rotate by the blood pump inside the dialysis machine, a telescopic plate that moves up and down as the transmission shaft rotates, and a pressing rod arranged on the bottom surface of the telescopic plate; The pressurizing cylinder includes a cylinder body, a piston plate arranged inside the cylinder body, and an air pipe arranged at the top of the cylinder body, which drives the piston plate to move up and down together with the telescopic plate, and completes the pressurization operation of the liquid storage bottle through the air pipe; The liquid passage part includes a plurality of regularly distributed cross tube bodies, liquid blocking plugs slidably connected to the longitudinal rods of the cross tube bodies, and springs that push the liquid blocking plugs upward by elastic force. The telescopic plate descends to trigger the plurality of liquid blocking plugs to move downward through the pressing rod, so that the heparin liquid can intermittently flow from the cross tube bodies into the dialysis machine, thereby adjusting the dosage of a single heparin liquid injection.

2. The anti-coagulation double-lumen catheter hemodialyzer according to claim 1, characterized in that: The liquid storage bottle includes a bottle body with a U-shaped longitudinal section and a horizontal plate fixedly connected to the top of the bottle body by screws. The bottom end of the outer wall of the bottle body is provided with a plurality of regularly distributed liquid outlets, and the outer wall of the bottle body is provided with two air inlet holes that penetrate inside and outside.

3. The anti-coagulation double-lumen catheter hemodialyzer according to claim 2, characterized in that: The upper and lower ends of the transmission shaft are rotatably connected to the bottom surface of the horizontal plate and the top surface of the bottle body respectively. A bidirectional threaded groove is provided on the outer wall of the transmission shaft to limit the movement range of the telescopic plate. The transverse cross-section of the telescopic plate is I-shaped and is sleeved on the outer side of the bidirectional threaded groove. The lower pressure rod is clamped and fixed on the bottom surface of the telescopic plate.

4. The anti-coagulation double-lumen catheter hemodialyzer according to claim 3, characterized in that: The transmission part also includes a worm coaxially connected to the central axis of the blood pump inside the dialysis machine, a worm wheel meshing with the worm, and an outer frame for providing a rotation range for the worm. The worm wheel is fixedly connected to the outer wall of the transmission shaft by a pin, and the outer frame is fixedly connected to the outer wall of the bottle body.

5. The anti-coagulation double-lumen catheter hemodialyzer according to claim 4, characterized in that: An air intake valve is provided at the top of the outer wall of the cylinder, and a piston plate is slidably connected to the interior of the cylinder. A connecting rod is clamped and fixed to the end of the telescopic plate on the bottom surface of the piston plate. When the telescopic plate moves up and down, the piston plate is driven to move up and down in the cylinder through the connecting rod, so that external gas can enter the interior of the cylinder through the air intake valve and then be sent to the interior of the bottle through the air pipe.

6. The anti-coagulation double-lumen catheter type hemodialyzer according to claim 5, characterized in that: The outer side of the cylinder is sleeved with a fixing frame, which is clamped and fixed on the outer side wall of the bottle body. The top surface of the cylinder is clamped with an air pipe, and the other end of the air pipe extends to the inside of the bottle body through the air inlet hole. The end of the air pipe is threadedly connected with an air outlet valve.

7. The anti-coagulation double-lumen catheter hemodialyzer according to claim 1, characterized in that: The outer ends of several of the cross tube bodies are connected to injection tubes, which include an injection tube body, external tubes with funnel-shaped ends, and a spiral plate arranged on the inner wall of the injection tube body. A tube wall through hole is opened on the inner wall of the injection tube body on the side of the spiral plate close to the blood inlet end. The external tube is funnel-shaped and is integrally formed with the injection tube body. The spiral plate is adhesively fixed to the inner wall of the injection tube body.

8. The anti-coagulation double-lumen catheter hemodialyzer according to claim 7, characterized in that: One end of the cross tube is fixedly connected to the outside of the liquid outlet, and the other end is fixedly connected to the outside of the through hole of the tube wall. A slide groove is provided near the top of the cross tube.

9. The anti-coagulation double-lumen catheter hemodialysis instrument according to claim 1, characterized in that: The liquid blocking plug located in the middle is connected with round rods on both sides, and sleeve rods are sleeved at both ends of the round rod. The sleeve rods are inserted into the top of the liquid blocking plug located on the outside. The liquid blocking plug is slidably connected to the inside of the longitudinal tube of the cross tube body. The liquid blocking plug is provided with liquid holes that pass through left and right. The liquid blocking plug is provided with a jack that passes through front and back near the top for inserting the sleeve rod.

10. The anti-coagulation double-lumen catheter type hemodialyzer according to claim 9, characterized in that: The upper and lower ends of the spring are respectively adhered and fixed to the bottom surface of the liquid blocking plug and the bottom tube body of the cross tube body longitudinal tube. The top of the liquid blocking plug located in the middle position is clamped and fixed with an upward extension rod. The sleeve rod is slidably connected to the outside of the round rod and a shift block is adhered to its outer side wall.

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