A novel intrahepatic and extrahepatic portal vein angiography catheter

Abstract

The present invention discloses a novel intrahepatic and extrahepatic portal vein angiography pipeline. The novel intrahepatic and extrahepatic portal vein angiography pipeline includes a venous catheter, a puncture needle, and a contrast agent infusion tube. The venous catheter includes a venous catheter body and a catheter body switch, and the catheter body switch is arranged on the venous catheter body to control the flow of liquid in the venous catheter body. The novel intrahepatic and extrahepatic portal vein angiography pipeline of the present invention is provided with a venous catheter, a puncture needle, and two contrast agent infusion tubes. The components can be quickly connected and disassembled in a matching manner, and the contrast agent infusion tube can be conveniently and quickly replaced to be respectively used for intrahepatic portal vein angiography, extrahepatic portal vein angiography, and portal vein pressure measurement. The operation is convenient, the angiography success rate is improved, the angiography difficulty and bleeding risk are reduced, the angiography operation time can be shortened, the patient pain is reduced, and the intrahepatic and extrahepatic portal vein imaging effect is enhanced, which is beneficial to the diagnosis and treatment of intrahepatic and extrahepatic portal vein diseases.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to a novel intrahepatic and extrahepatic portal vein angiography pipeline. Background Art

[0002] Angiography belongs to an interventional detection method. During the detection, a contrast agent is injected into the blood vessel. Utilizing the characteristic that X-rays cannot penetrate the contrast agent, the blood vessel lesions are diagnosed through the images shown by the contrast agent under X-rays. Angiography is an auxiliary examination technique. In the contemporary era of developed technology, angiography technology is commonly used in the diagnosis and treatment of various clinical diseases, which helps doctors detect the condition in a timely manner, control the progression of the condition, and effectively improve the survival rate of patients. Hepatic portal vein angiography is a detection method for the liver and portal vein system. Patients cannot take heavy metal drugs within 1 week before the examination, otherwise it will cause great interference to the angiography detection. Hepatic portal vein angiography is applicable to the diagnosis and differential diagnosis of various liver and portal vein system diseases such as small hepatocellular carcinoma, cirrhotic regenerative nodules, portal vein cancer thrombus, extrahepatic portal vein obstruction, portal hypertension, intrahepatic portal vein dysplasia, congenital portosystemic shunt malformation, and recurrence after liver cancer surgery.

[0003] Currently, when performing extrahepatic or intrahepatic portal vein angiography detection, many medical institutions use pipelines such as infusion tubes in cooperation with puncture needles to perform tasks such as injecting contrast agents. Due to the lack of a unified angiography pipeline and a puncture catheter dedicated to the portal vein, the connection is mismatched, which not only increases the time of angiography operation, but also because of the mismatched instruments, there is a possibility of pipeline detachment during angiography, the risk of angiography failure, and even the risk of blood backflow in the vein through the pipeline causing bleeding. The above factors lead to a long time consumption for angiography, unstable angiography results, and unnecessary pain and risks to patients. Therefore, how to design a set of novel intrahepatic and extrahepatic portal vein angiography pipelines suitable for intrahepatic and extrahepatic portal veins, which can be quickly, safely and effectively connected during intrahepatic and extrahepatic portal vein angiography detection and is convenient for angiography detection is a technical problem to be solved urgently at present. Summary of the Invention

[0004] Therefore, the present invention provides a novel intrahepatic and extrahepatic portal vein angiography pipeline to solve the problems in the prior art such as the lack of a unified portal vein angiography catheter and connection pipeline, resulting in mismatched connections, inconvenient use, unstable connections, and angiography failure.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides a novel intrahepatic and extrahepatic portal vein angiography pipeline. The novel intrahepatic and extrahepatic portal vein angiography pipeline includes a venous catheter, a puncture needle, and a contrast agent infusion tube. The venous catheter includes a venous catheter body and a catheter body switch. The catheter body switch is arranged on the venous catheter body to control the flow of liquid in the venous catheter body. The front end of the venous catheter body is provided with a venous catheter tip for the puncture needle to pass through, and the rear end of the venous catheter body is provided with a first connection port for connecting the contrast agent infusion tube.

[0007] Further, the venous catheter body is further provided with a connecting side tube. One end of the connecting side tube is connected to the venous catheter body in a communicating manner and is close to the first connection port end. The other end of the connecting side tube is provided with a second connection port for connecting the contrast agent infusion tube. The first connection port and the second connection port are respectively provided with reinforcing connection convex rings.

[0008] Further, the venous catheter further includes a second connection port switch, and the second connection port switch is arranged on the connecting side tube.

[0009] Further, the venous catheter body is a plastic hose with a smooth outer wall, and the catheter body switch is a catheter clamp. The connecting side tube is a plastic hard tube with a smooth outer wall and is integrally formed with the venous catheter body, and the second connection port switch is a rotary switch.

[0010] Further, the puncture needle includes a puncture needle body and a puncture needle tail. The puncture needle tail is connected to the rear end of the puncture needle body. The front end of the puncture needle body is provided with a tip head. The inner diameter of the opening of the venous catheter tip is larger than the outer diameter of the tip head.

[0011] Further, the contrast agent infusion tube is a single-channel contrast agent infusion tube, a double-channel contrast agent infusion tube, or a syringe.

[0012] Further, the front end of the single-channel contrast agent infusion tube is provided with an outlet end for being inserted into the first connection port. The rear end of the single-channel contrast agent infusion tube is provided with an inlet end for being inserted into a syringe or a portal vein pressure measuring tube. The inlet end is provided with a reinforcing connection convex ring. The single-channel contrast agent infusion tube further includes a threaded connection tube for being clamped outside the reinforcing connection convex ring of the first connection port. The threaded connection tube is arranged at the outlet end and is sleeved outside the single-channel contrast agent infusion tube in a slidable manner back and forth. The threaded connection tube is provided with internal threads.

[0013] Further, the length of the single-channel contrast agent infusion tube is 30 cm.

[0014] Further, the dual-channel contrast agent infusion tube includes a first tube body, a second tube body, a third tube body, and a three-way switch. The three-way switch is connected between the front end of the second tube body, the front end of the third tube body, and the rear end of the first tube body. The front end of the first tube body is provided with a first tube body liquid outlet end for plugging into the first connection port. The rear end of the second tube body is provided with a second tube body liquid inlet end for plugging a syringe. The rear end of the third tube body is provided with a third tube body liquid inlet end for plugging a syringe. Reinforcing connection convex rings are respectively arranged at the second tube body liquid inlet end and the third tube body liquid inlet end. The dual-channel contrast agent infusion tube further includes a threaded connection tube for clamping outside the reinforcing connection convex ring of the first connection port. The threaded connection tube is arranged at the first tube body liquid outlet end and is sleeved on the first tube body in a slidable manner back and forth. The threaded connection tube is provided with internal threads.

[0015] Further, the length of the first tube body is 10 cm, and the lengths of the second tube body and the third tube body are 30 cm.

[0016] The present invention has the following advantages:

[0017] The novel hepatic and extrahepatic portal vein angiography pipeline of the present invention is provided with a venous catheter, a puncture needle, and two contrast agent infusion tubes. The components can be quickly connected and disassembled in a matching manner, and the contrast agent infusion tubes can be conveniently and quickly replaced for intrahepatic portal vein angiography, extrahepatic portal vein angiography, and portal vein pressure measurement respectively. The operation is convenient, the angiography operation time can be shortened, the angiography effect can be improved, and the pain of the patient can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, other implementation drawings can be obtained according to the provided drawings without creative efforts.

[0019] The structures, ratios, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limited conditions for the implementation of the present invention. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size should still fall within the scope covered by the technical content disclosed in the present invention without affecting the efficacy and purpose that the present invention can achieve.

[0020] Figure 1 It is a schematic structural diagram of the venous catheter in a novel hepatic and extrahepatic portal vein angiography pipeline provided by the present invention;

[0021] Figure 2 Schematic diagram of the structure of a puncture needle in a novel intrahepatic and extrahepatic portal vein angiography pipeline provided by the present invention;

[0022] Figure 3 Schematic diagram of the structure of a single-channel contrast agent infusion tube in a novel intrahepatic and extrahepatic portal vein angiography pipeline provided by the present invention;

[0023] Figure 4 Schematic diagram of the structure of a double-channel contrast agent infusion tube in a novel intrahepatic and extrahepatic portal vein angiography pipeline provided by the present invention;

[0024] In the figure:

[0025] 1. Venous catheter; 2. Puncture needle; 3. Single-channel contrast agent infusion tube; 4. Double-channel contrast agent infusion tube; 10. Venous catheter body; 11. Tip of the venous catheter; 12. First connection port; 13. Second connection port; 14. Second connection port switch; 15. Catheter body switch; 16. Connecting side tube; 21. Puncture needle body; 22. Tail of the puncture needle; 31. Liquid outlet end; 32. Liquid inlet end; 41. First tube body liquid outlet end; 42. Three-way switch; 43. Second tube body liquid inlet end; 44. Third tube body liquid inlet end; 401. First tube body; 402. Second tube body; 403. Third tube body. Detailed implementation manners

[0026] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0027] Embodiment 1

[0028] This embodiment provides a novel intrahepatic and extrahepatic portal vein angiography pipeline. As Figures 1-4 shown, the novel intrahepatic and extrahepatic portal vein angiography pipeline includes a venous catheter 1, a puncture needle 2, and a contrast agent infusion tube. The venous catheter 1 includes a venous catheter body 10 and a catheter body switch 15. The catheter body switch 15 is arranged on the venous catheter body 10 to control the flow of liquid in the venous catheter body 10. The front end of the venous catheter body 10 is provided with a tip of the venous catheter 11 for the puncture needle 2 to pass through. The rear end of the venous catheter body 10 is provided with a first connection port 12 for connecting the contrast agent infusion tube.

[0029] When the novel intrahepatic and extrahepatic portal vein angiography catheter of this embodiment is used for extrahepatic portal vein angiography, in the first step, after ligating the proximal end of the branch vein of the superior mesenteric vein, the puncture needle 2 is inserted into the cavity of the venous catheter 1. The venous puncture tube formed by combining the venous catheter 1 and the puncture needle 2 is placed into the branch vessel of the superior mesenteric vein by means of venous puncture. Then, the puncture needle 2 is withdrawn from the cavity of the venous catheter 1, and only a part of the head end of the venous catheter 1 is retained in the vein. The switch 15 of the catheter body is closed to avoid bleeding caused by venous blood reflux after the puncture needle is withdrawn. Then, the venous catheter is fixed with silk thread for subsequent portal vein pressure measurement and angiography.

[0030] When the novel intrahepatic and extrahepatic portal vein angiography catheter of this embodiment is used for intrahepatic portal vein angiography, in the first step, the puncture needle 2 is inserted into the cavity of the venous catheter 1. The venous puncture tube formed by combining the venous catheter 1 and the puncture needle 2 is placed into the umbilical vein of the round ligament of the liver by means of venous puncture. Then, the puncture needle 2 is withdrawn from the cavity of the venous catheter 1, and only a part of the head end of the venous catheter 1 is retained in the vein. The switch 15 of the catheter body is closed to avoid bleeding caused by venous blood reflux after the puncture needle is withdrawn. Then, the venous catheter is fixed with silk thread for subsequent portal vein pressure measurement and angiography.

[0031] In the novel intrahepatic and extrahepatic portal vein angiography catheter of this embodiment, the venous catheter 1 can not only be matched with the puncture needle 2 for venous puncture to insert the venous catheter 1, and the first connection port 12 at the rear end of the venous catheter 1 can be matched with the contrast agent infusion tube. In addition, through the switch 15 of the catheter body, the flow of liquid in the venous catheter body 10 can be conveniently controlled, and the operation is convenient and fast.

[0032] Embodiment 2

[0033] For the novel intrahepatic and extrahepatic portal vein angiography catheter as described in Embodiment 1, as Figure 1 shown, the venous catheter body 10 is further provided with a connecting side tube 16. One end of the connecting side tube 16 is connected to the venous catheter body 10 in a communicating manner and is close to the end of the first connection port 12. The other end of the connecting side tube 16 is provided with a second connection port 13 for connecting the contrast agent infusion tube; the first connection port 12 and the second connection port 13 are respectively provided with reinforcing connection convex rings.

[0034] Taking the reinforcing connection convex ring of the second connection port 13 as an example, the reinforcing connection convex ring is arranged on the outer side of the other end of the connecting side tube 16 and is integrally formed with the connecting side tube 16. By providing the reinforcing connection convex ring of the second connection port 13, when other pipe bodies are inserted into the second connection port 13, they can be connected more firmly, effectively preventing other pipe bodies from falling off and slipping out.

[0035] The venous catheter 1 of this embodiment is provided with two contrast agent injection ports: a first connection port 12 and a second connection port 13, so that two groups of pipelines can be injected simultaneously to increase the injection speed of the contrast agent, which is used for the situation where a large amount of contrast agent needs to be quickly injected into the portal vein to achieve portal venography.

[0036] Embodiment 3

[0037] The novel intrahepatic and extrahepatic portal venography pipeline as described in Embodiment 2, as Figure 1 shown, the venous catheter 1 further includes a second connection port switch 14, and the second connection port switch 14 is arranged on the connecting side tube 16.

[0038] When only the first connection port 12 is needed for contrast agent injection, the second connection port switch 14 can be closed. When two groups of pipelines are needed to inject contrast agent simultaneously, the second connection port switch 14 is opened. The first connection port 12 and the second connection port 13 are respectively connected to the contrast agent infusion tubes. In short, by setting the second connection port switch 14, the number of injection connection ports used can be conveniently selected.

[0039] Embodiment 4

[0040] For the novel intrahepatic and extrahepatic portal venography pipeline as described in Embodiment 3, the venous catheter body 10 is a plastic hose with a smooth outer wall, and the catheter body switch 15 is a catheter clamp; the connecting side tube 16 is a plastic hard tube with a smooth outer wall and is integrally formed with the venous catheter body 10, and the second connection port switch 14 is a rotary switch.

[0041] The connecting side tube 16 is a plastic hard tube with a smooth outer wall and is integrally formed with the venous catheter body 10. In this way, the whole formed by the venous catheter body 10 and the connecting side tube 16 has good stability and durability. The catheter body switch 15 is a catheter clamp, and the second connection port switch 14 is a rotary switch. The flow of the liquid in the venous catheter body 10 is controlled by the catheter clamp, and the flow of the liquid in the connecting side tube 16 is controlled by the rotary switch. The operation is convenient, easy to disassemble and assemble, and the bleeding situation caused by the backflow of venous blood during the operation is avoided by quickly controlling the connection and closing.

[0042] Embodiment 5

[0043] For the novel intrahepatic and extrahepatic portal venography pipeline as described in Embodiment 4, as Figure 2 shown, the puncture needle 2 includes a puncture needle body 21 and a puncture needle tail 22. The puncture needle tail 22 is connected to the rear end of the puncture needle body 21, and a tip head is arranged at the front end of the puncture needle body 21; the inner diameter of the opening of the venous catheter tip 11 is larger than the outer diameter of the tip head.

[0044] As a preferred embodiment, the size of the tail part 22 of the puncture needle is larger than that of the main body 21 of the puncture needle, so that the tail part 22 of the puncture needle can be more conveniently held and operated.

[0045] Example 6

[0046] The novel hepatic and extrahepatic portal vein angiography pipeline as described in Example 5, as Figure 3 and 4 shown, the contrast agent infusion tube is a single-channel contrast agent infusion tube 3, a double-channel contrast agent infusion tube 4 or a syringe.

[0047] The venous catheter 1 described in the above embodiments can generally be connected to a single-channel contrast agent infusion tube 3, a double-channel contrast agent infusion tube 4 or a syringe. When performing extrahepatic portal vein angiography, the double-channel contrast agent infusion tube 4 can be connected to the first connection port 12 of the venous catheter 1. When performing intrahepatic portal vein angiography, the single-channel contrast agent infusion tube 3 can be connected to the first connection port 12 of the venous catheter 1. That is, a set of novel hepatic and extrahepatic portal vein angiography pipelines simultaneously have the functions of extrahepatic portal vein angiography and intrahepatic portal vein angiography, and the switching connection during use is convenient and fast.

[0048] Example 7

[0049] The novel hepatic and extrahepatic portal vein angiography pipeline as described in Example 6, as Figure 3 shown, the front end of the single-channel contrast agent infusion tube 3 is provided with an outlet end 31 for plugging into the first connection port 12, and the rear end of the single-channel contrast agent infusion tube 3 is provided with an inlet end 32 for plugging a syringe or a portal vein manometer tube; the inlet end 32 is provided with a reinforcing connection convex ring; the single-channel contrast agent infusion tube 3 further includes a threaded connection tube for clamping outside the reinforcing connection convex ring of the first connection port 12. The threaded connection tube is arranged at the outlet end 31 and is sleeved outside the single-channel contrast agent infusion tube 3 and can slide back and forth (limit sliding back and forth), and the threaded connection tube is provided with internal threads.

[0050] By providing a reinforcing connection convex ring at the inlet end 32, when the syringe or the portal vein manometer tube is plugged into the inlet end 32, the connection with the inlet end 32 is more stable, effectively preventing the syringe or the portal vein manometer tube from falling off or slipping out.

[0051] When connecting the outlet end 31 to the first connection port 12, first, plug the outlet end 31 into the first connection port 12, and then push forward and rotate the threaded connection tube arranged at the outlet end 31 so that the internal threads of the threaded connection tube are clamped to the reinforcing connection convex ring of the first connection port 12. In this way, the outlet end 31 and the first connection port 12 are double-connected, and the connection between the two is more stable, effectively preventing the outlet end 31 from falling off the first connection port 12.

[0052] The length of the single-channel contrast agent infusion tube 3 is 30 cm.

[0053] The single-channel contrast agent infusion tube 3 of this embodiment can cooperate with the intravenous catheter 1 of Embodiment 1 for intrahepatic portal venography. After completing the first step of the intrahepatic portal venography in Embodiment 1, during the angiography, first flush the lumen of the single-channel contrast agent infusion tube 3 with heparinized saline and remove the air bubbles in the lumen. Then connect the liquid inlet end 32 to a 50-ml syringe in a plug-and-play manner (there is a certain amount of contrast agent in the syringe), and then connect the liquid outlet end 31 to the first connection port 12 in a threaded connection manner. The 50-ml syringe is fixed on the operating table of the experimental high-pressure injection pump, set the corresponding parameters, and perform the injection of the contrast agent.

[0054] In addition, the syringe or the portal vein manometer tube can also be connected to the liquid inlet end 32 in a threaded connection manner. The single-channel contrast agent infusion tube 3 is conveniently and quickly connected to the intravenous catheter 1, and the rear end of the single-channel contrast agent infusion tube 3 can be conveniently and quickly connected to the syringe or the portal vein manometer tube. The connection methods between the above components are simple and fast, and are easy to install and disassemble.

[0055] Embodiment 8

[0056] For the novel intrahepatic and extrahepatic portal venography pipeline as described in Embodiment 6, as Figure 4 shown, the double-channel contrast agent infusion tube 4 includes a first tube body 401, a second tube body 402, a third tube body 403 and a three-way switch 42. The three-way switch 42 is connected between the front end of the second tube body 402, the front end of the third tube body 403 and the rear end of the first tube body 401. A first tube body liquid outlet end 41 for inserting into the first connection port 12 is provided at the front end of the first tube body 401. A second tube body liquid inlet end 43 for inserting a syringe is provided at the rear end of the second tube body 402. A third tube body liquid inlet end 44 for inserting a syringe is provided at the rear end of the third tube body 403. Reinforcing connection convex rings are respectively provided at the second tube body liquid inlet end 43 and the third tube body liquid inlet end 44. The double-channel contrast agent infusion tube 4 further includes a threaded connection tube for clamping outside the reinforcing connection convex ring of the first connection port 12. The threaded connection tube is provided at the first tube body liquid outlet end 41 and is slidably sleeved outside the first tube body 401 in the front-rear direction. The threaded connection tube is provided with internal threads.

[0057] By providing the reinforcing connection convex rings at the second tube body liquid inlet end 43 and the third tube body liquid inlet end 44, the connection is more firm when the syringe is inserted into the second tube body liquid inlet end 43 or the third tube body liquid inlet end 44.

[0058] When connecting the liquid outlet end 41 of the first tube body to the first connection port 12, first, insert the liquid outlet end 41 of the first tube body into the first connection port 12, and then slide forward and rotate the threaded connection tube of the liquid outlet end 41 of the first tube body so that the internal thread of the threaded connection tube is clamped to the reinforcement connection convex ring of the first connection port 12. In this way, there is a double connection between the liquid outlet end 41 of the first tube body and the first connection port 12, and the connection between the two is more stable, effectively preventing the liquid outlet end 41 of the first tube body from falling off the first connection port 12.

[0059] The length of the first tube body 401 is 10 cm, and the lengths of the second tube body 402 and the third tube body 403 are 30 cm.

[0060] The dual-channel contrast agent infusion tube 4 of this embodiment can cooperate with the intravenous catheter 1 of Embodiment 1 for extrahepatic portal venography. After completing the first step of the extrahepatic portal venography in Embodiment 1, during the angiography, first, rinse the inner cavity of the dual-channel contrast agent infusion tube 4 with heparinized saline and remove the air bubbles in the cavity. Then, connect the liquid inlet end 43 of the second tube body and the liquid inlet end 44 of the third tube body to a 50 ml syringe respectively by plugging and unplugging (there is a certain amount of contrast agent in the syringe). Then, connect the liquid outlet end 41 of the first tube body to the first connection port 12 by threaded connection. The two 50 ml syringes are fixed on the operating table of the experimental high-pressure injection pump, set the corresponding parameters, and inject the contrast agent.

[0061] The novel intrahepatic and extrahepatic portal venography pipeline of this embodiment is provided with a dual-channel contrast agent infusion tube 4. A three-way switch 42 is provided between the first tube body 401 and the second tube body 402 and the third tube body 403 of the dual-channel contrast agent infusion tube 4. By adjusting the three-way switch 42, it is possible to simultaneously select to connect / close between the first tube body 401 and the second tube body 402, and connect / close between the first tube body 401 and the third tube body 403, which is convenient and fast to operate.

[0062] In the novel intrahepatic and extrahepatic portal vein angiography pipeline of the above embodiments, the venous catheter 1 is a plastic hose with a smooth outer wall, and different models are selected according to different punctured veins. When performing extrahepatic portal vein angiography, catheters of 12G and 16G are generally selected according to the diameter of the branch veins of the superior mesenteric vein (the catheter length is 10 cm); when performing intrahepatic portal vein angiography and umbilical vein puncture, catheters of 20G, 22G, and 24G are generally selected (the catheter length is 5 cm). The tip 11 of the venous catheter is the tip of the venous catheter, and this part is inserted into the vein. The first connection port 12 is a connection part, which can be connected to a common syringe, the liquid outlet end 31, or the liquid outlet end 41 of the first tube body by means of threaded connection or plugging and unplugging. The second connection port 13 is a connection part, which can be connected to a common syringe, the liquid outlet end 31, or the liquid outlet end 41 of the first tube body by means of threaded connection or plugging and unplugging, and the channel of the second connection port 13 is connected and closed by the second connection port switch 14. Generally, heparinized saline is injected during angiography or pressure measurement to avoid blood coagulation and catheter embolism. The catheter body switch 15 is a catheter clamp, which can close and loosen the venous catheter 1.

[0063] The puncture needle 2 is a puncture needle tool that matches the venous catheter 1 and is used for venous puncture.

[0064] The liquid outlet end 31 of the single-channel contrast agent infusion tube 3 can be threadedly connected into the first connection port 12 to connect the single-channel contrast agent infusion tube 3 to the venous catheter 1. The liquid inlet end 32 is connected to a common syringe (filled with contrast agent) by means of plugging and unplugging. The single-channel contrast agent infusion tube 3 is not only used for intrahepatic portal vein angiography, but also for measuring the intrahepatic and extrahepatic portal vein pressure; when measuring the portal vein pressure, the liquid outlet end 31 is connected to the first connection port 12, and the liquid inlet end 32 is connected to the pressure measuring tube. The length of the single-channel contrast agent infusion tube 3 is generally 30 cm.

[0065] The first tube body liquid outlet end 41 of the double-channel contrast agent infusion tube 4 can be threadedly connected into the first connection port 12 to connect the double-channel contrast agent infusion tube 4 to the venous catheter 1. The three-way switch 42 is a switch that controls the passage and closure of the second tube body liquid inlet end 43 and the third tube body liquid inlet end 44 with the first tube body liquid outlet end 41. Generally, when flushing the inner cavity of the double-channel contrast agent infusion tube 4 with heparinized saline, the passage and closure of the pipeline are controlled to avoid the generation of air bubbles. At the same time, the connection and closure can also be controlled through the three-way switch 42, so that the double-channel contrast agent infusion tube 4 can be switched between a single-channel and a double-channel contrast agent infusion tube. The second tube body liquid inlet end 43 and the third tube body liquid inlet end 44 are connected to a common syringe by means of plugging and unplugging. Regarding the pipeline length: the length from the first tube body liquid outlet end 41 to the three-way switch 42 is 10 cm, and the lengths from the three-way switch 42 to the second tube body liquid inlet end 43 and from the three-way switch 42 to the third tube body liquid inlet end 44 are equal, both being 30 cm.

[0066] Although the present invention has been described in detail above with general descriptions and specific embodiments, on the basis of the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. A novel intrahepatic and extrahepatic portal vein angiography pipeline, characterized in that, The novel intrahepatic and extrahepatic portal vein angiography pipeline includes a venous catheter (1), a puncture needle (2), and a contrast agent infusion tube. The venous catheter (1) includes a venous catheter body (10) and a catheter body switch (15). The catheter body switch (15) is arranged on the venous catheter body (10) to control the flow of liquid in the venous catheter body (10). The front end of the venous catheter body (10) is provided with a venous catheter tip (11) for the puncture needle (2) to pass through. The rear end of the venous catheter body (10) is provided with a first connection port (12) for connecting the contrast agent infusion tube. The venous catheter body (10) is further provided with a connecting side tube (16). One end of the connecting side tube (16) is connected to the venous catheter body (10) in a communicating manner and is close to the first connection port (12). The other end of the connecting side tube (16) is provided with a second connection port (13) for connecting the contrast agent infusion tube. Reinforcing connection convex rings are respectively arranged at the first connection port (12) and the second connection port (13). The venous catheter (1) further includes a second connection port switch (14). The second connection port switch (14) is arranged on the connecting side tube (16). Among them, the venous catheter body (10) is a plastic hose with a smooth outer wall, and the catheter body switch (15) is a catheter clamp; the connecting side tube (16) is a plastic hard tube with a smooth outer wall and is integrally formed with the venous catheter body (10), and the second connection port switch (14) is a rotary switch. The puncture needle (2) includes a puncture needle body (21) and a puncture needle tail (22). The puncture needle tail (22) is connected to the rear end of the puncture needle body (21). The front end of the puncture needle body (21) is provided with a tip head; the inner diameter of the opening of the venous catheter tip (11) is larger than the outer diameter of the tip head, and the size of the puncture needle tail (22) is larger than that of the puncture needle body (21).

2. The novel intrahepatic and extrahepatic portal vein angiography pipeline according to claim 1, wherein The contrast agent infusion tube is a single-channel contrast agent infusion tube (3), a double-channel contrast agent infusion tube (4), or a syringe.

3. The novel intrahepatic and extrahepatic portal vein angiography pipeline according to claim 2, characterized in that, The front end of the single-channel contrast agent infusion tube (3) is provided with an outlet end (31) for being inserted into the first connection port (12). The rear end of the single-channel contrast agent infusion tube (3) is provided with an inlet end (32) for being inserted into a syringe or a portal vein manometer tube. The inlet end (32) is provided with a reinforcing connection convex ring. The single-channel contrast agent infusion tube (3) further includes a threaded connection tube for being clamped outside the reinforcing connection convex ring of the first connection port (12). The threaded connection tube is arranged at the outlet end (31) and is sleeved outside the single-channel contrast agent infusion tube (3) in a slidable manner back and forth. The threaded connection tube is provided with internal threads.

4. The novel intrahepatic and extrahepatic portal vein angiography catheter according to claim 2, wherein The length of the single-channel contrast agent infusion tube (3) is 30 cm.

5. The novel intrahepatic and extrahepatic portal vein angiography pipeline according to claim 2, wherein, The dual-channel contrast agent infusion tube (4) includes a first tube body (401), a second tube body (402), a third tube body (403) and a three-way switch (42). The three-way switch (42) is connected between the front end of the second tube body (402), the front end of the third tube body (403) and the rear end of the first tube body (401). A first tube body liquid outlet end (41) for being inserted into the first connection port (12) is arranged at the front end of the first tube body (401). A second tube body liquid inlet end (43) for inserting a syringe is arranged at the rear end of the second tube body (402). A third tube body liquid inlet end (44) for inserting a syringe is arranged at the rear end of the third tube body (403). Reinforcing connection convex rings are respectively arranged at the second tube body liquid inlet end (43) and the third tube body liquid inlet end (44). The dual-channel contrast agent infusion tube (4) further includes a threaded connection tube for being clamped outside the reinforcing connection convex ring of the first connection port (12). The threaded connection tube is arranged at the first tube body liquid outlet end (41) and is slidably sleeved outside the first tube body (401) in the front and rear directions. The threaded connection tube is provided with internal threads.

6. The novel intrahepatic and extrahepatic portal vein angiography pipeline according to claim 5, characterized in that, The length of the first tube body (401) is 10 cm, and the lengths of the second tube body (402) and the third tube body (403) are 30 cm.

Images