Catheter member and catheter positioning system

Abstract

The utility model belongs to the technical field of medical instruments, and particularly provides a catheter component and a catheter positioning system.The catheter component comprises a catheter and a fixator, the catheter comprises a first end and a second end, the first end is used for being inserted into a central vein, the catheter is provided with an infusion hole penetrating through the length direction of the catheter, and a guide wire can penetrate through the infusion hole; the fixer is detachably connected with the second end, and the fixer can fix the guide wire. By arranging the fixator connected with the second end, relative fixation of the catheter and the guide wire is achieved, then the relative position relation between the first end of the catheter and the end of the guide wire is effectively controlled, the position of the first end of the catheter can be judged according to the position of the end of the guide wire, and the position of the first end of the catheter in the central vein is effectively controlled; according to the design, the catheter and the guide wire can be synchronously inserted into the central vein as a whole, repeated operation caused by independent insertion of the catheter and the guide wire is avoided, and therefore the operation efficiency of inserting the catheter into the central vein is effectively improved.

Description

Technical Field

[0001] The present application belongs to the field of medical device technology, and more specifically, to a catheter component and a catheter positioning system. Background Art

[0002] An implantable venous access port (IVAP) is a closed infusion device that is completely implanted in the human body. It mainly includes a catheter located in the central vein and an infusion seat implanted under the skin. IVAP provides a safe and reliable venous access for patients who require long-term infusion therapy and chemotherapy. It can deliver drugs directly to the central vein to avoid peripheral phlebitis and vascular sclerosis, and can also effectively prevent local tissue necrosis caused by extravasation of chemotherapy drugs. There is no exposure point outside the body when IVAP is implanted, and the patient's daily activities are not restricted. While protecting the patient's privacy, it also improves the patient's quality of life and satisfaction.

[0003] During IVAP implantation, it is very important to position the catheter tip away from the infusion socket. If the catheter tip is not in the optimal position, it will cause different hazards. If the catheter tip is too shallow, it will cause thrombosis, catheter malposition, phlebitis, etc. If the catheter tip is too deep, it will cause the catheter tip to enter the right atrium and cause arrhythmia, damage the heart and valves, and even pericardial tamponade.

[0004] The clinical methods for determining the depth of the catheter tip include: body surface positioning method, formula method, fluoroscopic positioning method, and electrocardiographic positioning method. As for the electrocardiographic positioning method, the current operation process is relatively complicated and the positioning efficiency is not high, which is not conducive to the promotion and application of the electrocardiographic positioning method. Utility Model Content

[0005] The purpose of the present application is to provide a catheter component and a catheter positioning system to solve the technical problems of complex operation and low positioning efficiency existing in the prior art.

[0006] To achieve the above purpose, the technical solution adopted in this application is:

[0007] In one aspect, a catheter component is provided, the catheter component comprising:

[0008] A catheter, the catheter comprising a first end and a second end, the first end being used for inserting into a central vein, the catheter being provided with an infusion hole running through the length of the catheter, the infusion hole being capable of allowing a guide wire to pass therethrough;

[0009] A fixer is detachably connected to the second end, and the fixer can fix the guide wire.

[0010] First, by providing the fixture connected to the second end, in the process of positioning the first end of the catheter, the fixture can be used to fix the guidewire, so that the catheter and the guidewire are relatively fixed, and then the relative position relationship between the first end of the catheter and the end of the guidewire is effectively controlled, so that the position of the first end of the catheter can be judged according to the end position of the guidewire, and the position of the first end of the catheter in the central vein can be effectively controlled, so as to avoid the harm of the first end position deviation to the patient, and effectively improve the reliability of the closed infusion device. Secondly, by providing the fixture, the catheter and the guidewire can be relatively fixed, and then the catheter and the guidewire can be inserted into the central vein synchronously as a whole, avoiding the repetitive operation caused by the separate insertion of the catheter and the guidewire, thereby effectively improving the operational efficiency of the catheter insertion into the central vein.

[0011] As an embodiment, the fixator includes a fixing body, the fixing body includes a fixing shaft, the fixing shaft can be inserted into the infusion hole, and the fixing shaft is interference fit with the infusion hole.

[0012] The fast fixation of the fixator and the catheter can be achieved through the interference fit between the fixed shaft and the infusion hole. This matching structure has low design difficulty, is easy to manufacture, and is convenient to assemble and disassemble.

[0013] As an embodiment, the fixing body further includes a fixing cap, which is disposed at one end of the fixing shaft, and the outer diameter of the fixing cap is larger than the outer diameter of the fixing shaft, and the fixing cap is used to abut against the second end.

[0014] By providing the fixing cap capable of abutting the second end, the axial positioning between the catheter and the fixator can be made more reliable, thereby helping to improve the reliability of the relative axial position of the guidewire and the catheter, thereby facilitating the guidewire to more reliably control the position of the first end of the catheter.

[0015] As an embodiment, the fixing body is provided with a fixing hole, the fixing hole can be used for the guide wire to pass through, and the fixing hole and the guide wire are interference fit.

[0016] By providing the fixing hole that can be interference-fitted with the guide wire, the fixator and the guide wire can be quickly fixed. This matching structure has low design difficulty, is easy to manufacture, and is convenient to assemble and disassemble. The relative position of the fixator and the guide wire can also be easily adjusted.

[0017] As an implementation manner, a flexible material layer is provided on the hole wall of the fixing hole.

[0018] In the case where the fixing hole and the guide wire are interference fit, by providing the flexible material layer on the hole wall of the fixing hole, the hole diameter of the fixing hole can be enlarged within a certain range, thereby reducing the difficulty of the guide wire passing through the fixing hole.

[0019] As an embodiment, the fixing body is provided with a fixing hole and a clamping hole which are interconnected, the fixing hole can be used for the guide wire to pass through, and the diameter of the fixing hole is larger than the diameter of the guide wire; the fixer also includes a fixing clamp, the fixing clamp includes a clamping seat, and at least one clamping foot arranged on the clamping seat, when the clamping foot is inserted into the clamping hole, the clamping hole squeezes the clamping foot inward so that the clamping foot clamps the guide wire.

[0020] The guide wire is fixed by the cooperation between the clamping foot and the clamping hole, and the diameter of the fixing hole is larger than the diameter of the guide wire. Under the premise of ensuring that the guide wire and the fixer are reliably fixed, on the one hand, it is avoided that the guide wire is excessively rubbed against the fixing hole when passing through the fixing hole, causing debris to fall off and remain in the catheter, thereby avoiding the risk of these debris to the drug delivery environment; on the other hand, it can improve the convenience of the guide wire passing through the fixing seat, thereby helping to improve work efficiency.

[0021] As an implementation manner, the number of the clamping feet is three, and the three clamping feet are evenly spaced in the circumferential direction of the clamping seat.

[0022] By providing three clamping feet that are equally spaced along the circumferential direction, the guide wire can be prevented from being deviated during the process of clamping the guide wire, thereby improving the reliability of the fixation of the guide wire by the fixator.

[0023] As an embodiment, the first end of the catheter is provided with a first scale along the length direction of the catheter.

[0024] By setting the first scale at the first end, the distance between the end face of the first end and the guide wire can be quickly determined, thereby facilitating the improvement of the positioning efficiency and positioning accuracy of the catheter. Further, when the guide wire does not exceed the end face of the first end, the first scale can be used to quickly determine the distance value of the end face of the first end exceeding the end of the guide wire, thereby facilitating the improvement of the positioning efficiency and positioning accuracy of the catheter.

[0025] In another aspect, a catheter positioning system is provided, the catheter positioning system comprising:

[0026] A catheter member, wherein the catheter member is any one of the above-mentioned catheter members;

[0027] Electrocardiogram equipment;

[0028] A guide wire is connected to the electrocardiogram device, the guide wire is inserted into the catheter component, and one end of the guide wire away from the electrocardiogram device is aligned with the first end of the catheter component, and the electrocardiogram device is used to locate the position of the end of the guide wire away from the electrocardiogram device in the central vein.

[0029] By connecting the guide wire to the electrocardiogram device, the position of one end of the guide wire close to the first end can be determined by utilizing the P wave changes on the electrocardiogram device. Since the relative positions of the guide wire and the catheter are fixed, the position of the first end of the catheter in the central vein can be controlled to avoid harm to the patient caused by the position deviation of the first end, thereby effectively improving the reliability of the closed infusion device.

[0030] As an embodiment, a second scale is provided along the length direction of the guide wire at one end of the guide wire away from the electrocardiogram device.

[0031] By setting the second scale on the guidewire, the distance between the end face of the first end and the guidewire can be quickly determined, thereby facilitating the improvement of the positioning efficiency and positioning accuracy of the catheter. Further, when the end of the guidewire exceeds the first end, the second scale can be used to quickly determine the distance value of the end of the guidewire exceeding the end face of the first end, thereby facilitating the improvement of the positioning efficiency and positioning accuracy of the catheter.

[0032] The beneficial effects of the catheter component and the catheter positioning system provided by the present application are:

[0033] First, by providing the fixator connected to the second end, in the process of positioning the first end of the catheter, the guide wire can be fixed by the fixator to achieve relative fixation of the catheter and the guide wire, thereby effectively controlling the relative position relationship between the first end of the catheter and the end of the guide wire, so that the position of the first end of the catheter can be judged according to the end position of the guide wire, and the position of the first end of the catheter in the central vein can be effectively controlled, so as to avoid the harm of the first end position deviation to the patient, and effectively improve the reliability of the closed infusion device.

[0034] Secondly, by setting the fixator, the catheter and the guide wire can be relatively fixed, and then the catheter and the guide wire can be synchronously inserted into the central vein as a whole, avoiding the repetitive operations caused by the separate insertion of the catheter and the guide wire, thereby effectively improving the operational efficiency of the catheter insertion into the central vein. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0036] Figure 1 A schematic diagram of the structure of a conduit component provided in an embodiment of the present application;

[0037] Figure 2 A schematic diagram of the structure of a catheter provided in an embodiment of the present application;

[0038] Figure 3 A schematic diagram of the first structure of the fastener provided in an embodiment of the present application;

[0039] Figure 4 A second structural schematic diagram of the fastener provided in an embodiment of the present application;

[0040] Figure 5 A schematic diagram of the structure of a fixed body provided in an embodiment of the present application;

[0041] Figure 6 A schematic diagram of the structure of a fixing clip provided in an embodiment of the present application;

[0042] Figure 7 A schematic diagram of the combined structure of a catheter component and a guide wire provided in an embodiment of the present application;

[0043] Figure 8 A schematic diagram of the combined structure of a guidewire and a fixator provided in an embodiment of the present application;

[0044] Fig. 9 Another structural schematic diagram of the fixed body provided in an embodiment of the present application.

[0045] Among them, the reference numerals in the figure are:

[0046] 100. Catheter component;

[0047] 1. catheter; 11. first end; 12. second end; 13. infusion hole; 14. first scale;

[0048] 2. Fixer; 21. Fixing body; 211. Fixing shaft; 2111. First guiding inclined surface; 212. Fixing cap; 213. Fixing hole; 214. Clamping hole; 215. Fixing groove; 22. Fixing clamp; 221. Clamping seat; 222. Clamping foot;

[0049] 200, guide wire; 201, second scale. DETAILED DESCRIPTION

[0050] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0051] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0052] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0054] The present application embodiment provides a catheter component 100, such as Figure 1 and Figure 2 As shown, the catheter component 100 includes a catheter 1 and a fixator 2. The catheter 1 includes a first end 11 and a second end 12. The first end 11 is used to insert into the central vein. The catheter 1 is provided with an infusion hole 13 running through its length direction. The infusion hole 13 can allow a guide wire 200 to pass therethrough. The fixator 2 is detachably connected to the second end 12, and the fixator 2 can fix the guide wire 200.

[0055] First, by providing a fixator 2 connected to the second end 12, in the process of positioning the first end 11 of the catheter 1, the fixator 2 can be used to fix the guidewire 200, so as to achieve relative fixation of the catheter 1 and the guidewire 200, and then effectively control the relative position relationship between the first end 11 of the catheter 1 and the end of the guidewire 200, so that the position of the first end 11 of the catheter 1 can be judged according to the end position of the guidewire 200, and the position of the first end 11 of the catheter 1 in the central vein can be effectively controlled, so as to avoid the harm caused to the patient by the position deviation of the first end 11, and effectively improve the reliability of the closed infusion device. Secondly, by providing the fixator 2, the catheter 1 and the guidewire 200 can be relatively fixed, so that the catheter 1 and the guidewire 200 can be inserted into the central vein synchronously as a whole, avoiding the repetitive operation caused by the separate insertion of the catheter 1 and the guidewire 200, thereby effectively improving the operation efficiency of the insertion of the catheter 1 into the central vein.

[0056] Furthermore, first, Figure 8 As shown, before the guidewire 200 is assembled with the catheter 1, the guidewire 200 is first inserted into the fixture 2, and the end of the guidewire 200 is aligned with the first end 11. Then, the guidewire 200 and the catheter 1 are placed side by side and straightened, and the position of the fixture 2 is adjusted along the length direction of the guidewire 200 to align the fixture 2 with the second end 12. Keeping the relative position of the fixture 2 and the guidewire 200 unchanged, the guidewire 200 is inserted into the catheter 1 until the fixture 2 approaches the second end 12. At this time, the distance between the end of the guidewire 200 and the first end 11 and the distance between the fixture 2 and the second end 12 are compared, and the relative position of the fixture 2 and the guidewire 200 is fine-tuned. Then, the guidewire 200 and the fixture 2 continue to be inserted forward, as shown in FIG. Figure 7 As shown, the fixator 2 is fixedly connected to the catheter 1, thereby fixing the guidewire 200 to the catheter 1. Finally, the offset direction and distance between the end of the guidewire 200 and the second end 12 are observed and determined to clarify the relative positions of the two. Second, the end of the guidewire 200 away from the first end 11 is connected to the electrocardiogram device, and the guidewire 200 and the catheter 1 are pushed into the central vein synchronously. The position of the end of the guidewire 200 close to the first end 11 is determined by the change of the P wave on the electrocardiogram device. Since the relative position of the guidewire 200 and the catheter 1 is fixed, the position of the first end 11 of the catheter 1 in the central vein can be controlled until the first end 11 of the catheter 1 reaches the preset position. Third, after the first end 11 of the catheter 1 is positioned, the connection between the fixator 2 and the catheter 1 is released, and the fixator 2 and the guidewire 200 are moved away from the infusion hole 13. Finally, the second end 12 is connected to the infusion seat, and the infusion seat drives the drug through the infusion hole 13 to be delivered to the central vein.

[0057] In one embodiment, if Figures 1 to 3As shown, the fixator 2 includes a fixing body 21, and the fixing body 21 includes a fixing shaft 211, and the fixing shaft 211 can be inserted into the infusion hole 13, and the fixing shaft 211 is interference-fitted with the infusion hole 13. Through the interference fit between the fixing shaft 211 and the infusion hole 13, the fixator 2 and the catheter 1 can be quickly fixed, and this matching structure has low design difficulty, is easy to manufacture, and is convenient to disassemble and assemble.

[0058] In the specific implementation process, Figure 3 As shown, a first guiding slope 2111 is disposed on the outer periphery of the end of the fixed shaft 211 , and the first guiding slope 2111 is used to improve the convenience of inserting the fixed shaft 211 into the infusion hole 13 .

[0059] In one embodiment, if Figures 1 to 3 As shown, the fixed body 21 further includes a fixed cap 212 , which is disposed at one end of the fixed shaft 211 . The outer diameter of the fixed cap 212 is greater than the outer diameter of the fixed shaft 211 , and the fixed cap 212 is used to abut against the second end 12 .

[0060] By providing a fixing cap 212 that can abut the second end 12, the axial positioning between the catheter 1 and the fixer 2 can be made more reliable, which in turn helps to improve the reliability of the relative axial position of the guidewire 200 and the catheter 1, thereby facilitating the guidewire 200 to more reliably control the position of the first end 11 of the catheter 1.

[0061] In other embodiments, the fixed body 21 may also be designed as follows: Fig. 9 As shown, the fixed body 21 includes a fixed shaft 211 and a fixed cap 212, the fixed cap 212 is L-shaped, and the gap between the fixed cap 212 and the fixed shaft 211 is formed as a fixed groove 215, the fixed groove 215 is a wedge-shaped groove, and the second end 12 of the catheter 1 can be inserted into the fixed groove 215; or, the fixed body 21 includes a fixed shaft 211 and a fixed cap 212, the fixed cap 212 is L-shaped, and the gap between the fixed cap 212 and the fixed shaft 211 is formed as a fixed groove 215, and the second end 12 of the catheter 1 can be inserted into the fixed groove 215, and the inner circumferential wall surface of the fixed cap 212 is interference fit with the outer circumferential wall surface of the catheter 1, and the end face of the fixed cap 212 abuts against the second end 12 of the catheter 1.

[0062] In one embodiment, if Figure 1 As shown, the outer diameter of the fixing cap 212 is larger than the outer diameter of the catheter 1. By designing the outer diameter of the fixing cap 212 to be larger than the outer diameter of the catheter 1, a step is formed between the fixing cap 212 and the second end 12, which is conducive to the user applying force to the fixing cap 212, thereby improving the operating efficiency of disconnecting the fixing device 2 from the catheter 1.

[0063] In a specific implementation process, the outer periphery of the fixing cap 212 is provided with concave-convex patterns, and the concave-convex patterns are used to increase the friction when the user grasps the fixing cap 212, thereby reducing the probability of the fixer 2 slipping from the user's hand.

[0064] Of course, in other embodiments, the outer periphery of the fixing cap 212 may also be other non-circular shapes, such as a regular hexagon or an equilateral triangle. These non-circular shapes can also help increase the friction when the user grasps the fixing cap 212, thereby reducing the probability of the fixer 2 slipping from the user's hand.

[0065] In one embodiment, if Figure 3 and Figure 8 As shown, the fixing body 21 is provided with a fixing hole 213, and the fixing hole 213 can be provided for the guide wire 200 to pass through, and the fixing hole 213 is interference-fitted with the guide wire 200. By providing the fixing hole 213 that can be interference-fitted with the guide wire 200, the fast fixing of the fixer 2 and the guide wire 200 can be achieved. This matching structure has low design difficulty, is easy to manufacture, and is convenient to disassemble and assemble. Moreover, the relative position of the fixer 2 and the guide wire 200 can be adjusted more conveniently.

[0066] In the specific implementation process, the fixing hole 213 penetrates the fixer 2 along the axial direction of the fixer 2. A second guiding slope is provided at the end of the fixing hole 213, and the second guiding slope is used to improve the convenience of inserting the guide wire 200 into the fixing hole 213.

[0067] In one embodiment, a flexible material layer is provided on the wall of the fixing hole 213. In the case where the fixing hole 213 and the guide wire 200 are interference fit, by providing the flexible material layer on the wall of the fixing hole 213, the aperture of the fixing hole 213 can be enlarged within a certain range, thereby reducing the difficulty of the guide wire 200 passing through the fixing hole 213.

[0068] The above design can also be understood as follows: the fixed body 21 includes an integrated outer layer and an inner layer, the outer layer is made of a hard material, and the inner layer is made of a flexible material. By designing the outer layer to be made of a hard material, the convenience of inserting the fixed body 21 into the infusion hole 13 can be improved. Furthermore, the inner layer is made of any one of polytetrafluoroethylene (PTFE), silicone, thermoplastic elastomer (TPE), thermoplastic polyurethane elastomer (TPU), and fluororubber (FKM); the outer layer is made of any one of polypropylene (PP), high-density polyethylene (HDPE), and polyetheretherketone (PEEK).

[0069] Of course, in other embodiments, the fixed body 21 may also be made of only one material. Further, the material of the fixed body 21 is any one of polypropylene (PP), high-density polyethylene (HDPE), polyetheretherketone (PEEK), and ceramic.

[0070] In one embodiment, if Figures 4 to 6 As shown, the fixing body 21 is provided with a fixing hole 213 and a clamping hole 214 which are interconnected. The fixing hole 213 can be used for the guide wire 200 to pass through, and the diameter of the fixing hole 213 is larger than the diameter of the guide wire 200. The fixer 2 also includes a fixing clamp 22, and the fixing clamp 22 includes a clamping seat 221 and at least one clamping foot 222 arranged on the clamping seat 221. When the clamping foot 222 is inserted into the clamping hole 214, the clamping hole 214 squeezes the clamping foot 222 inwardly, so that the clamping foot 222 clamps the guide wire 200.

[0071] The guide wire 200 is fixed by the cooperation of the clamping foot 222 and the clamping hole 214, and the diameter of the fixing hole 213 is larger than the diameter of the guide wire 200. Under the premise of ensuring that the guide wire 200 and the fixer 2 are reliably fixed, on the one hand, it avoids excessive friction between the guide wire 200 and the fixing hole 213 when passing through the fixing hole 213, causing debris to fall off and remain in the catheter 1, thereby avoiding the risk of these debris to the drug delivery environment; on the other hand, it can improve the convenience of the guide wire 200 passing through the fixing seat, thereby helping to improve work efficiency.

[0072] In the specific implementation process, the clamp seat 221 is a circular ring structure, and the clamping foot 222 is arranged on the end surface of the clamp seat 221. The clamping hole 214 is a conical hole, and the clamping foot 222 is provided with a clamping inclined surface, and the clamping inclined surface can abut against the conical hole. The deeper the fixing clamp 22 is inserted into the clamping hole 214, the greater the force of the clamping foot 222 to clamp the guide wire 200.

[0073] In one embodiment, the number of the clamping feet 222 is three, and the three clamping feet 222 are evenly spaced in the circumferential direction of the clamping seat 221. By providing three clamping feet 222 evenly spaced in the circumferential direction, the guide wire 200 can be prevented from being displaced during the process of clamping the guide wire 200, thereby improving the fixing reliability of the fixture 2 on the guide wire 200.

[0074] In a specific implementation process, the diameter of the circle where the ends of the three clamping feet 222 are located is larger than the diameter of the guide wire 200. By making the diameter of the circle where the ends of the three clamping feet 222 are located larger than the diameter of the guide wire 200, it is possible to prevent the guide wire 200 from rubbing against the clamping feet 222 too much when passing between the three clamping feet 222, thereby preventing debris from falling off and remaining in the catheter 1, thereby preventing these debris from bringing risks to the drug delivery environment.

[0075] Of course, in other embodiments, it can also be designed that the ends of the three clamping feet 222 are interference fit with the guide wire 200. This design can not only fix the guide wire 200 by interference fit, but also fix the guide wire 200 by the fit between the clamping hole 214 and the clamping feet 222, thereby achieving double fixation and effectively improving the fixation reliability of the fixator 2 and the guide wire 200.

[0076] In a specific implementation, the number of the clamping feet 222 may also be two or four or more.

[0077] In one embodiment, if Figure 2 As shown, the first end 11 of the catheter 1 is provided with a first scale 14 along the length direction of the catheter 1. By providing the first scale 14 at the first end 11, the distance between the end face of the first end 11 and the guide wire 200 can be quickly determined, thereby facilitating the improvement of the positioning efficiency and positioning accuracy of the catheter 1. Further, when the guide wire 200 does not exceed the end face of the first end 11, the first scale 14 can be used to quickly determine the distance value of the end face of the first end 11 exceeding the end of the guide wire 200, thereby facilitating the improvement of the positioning efficiency and positioning accuracy of the catheter 1. In the specific implementation process, the graduation value of the first scale 14 is 1 cm or 1 mm.

[0078] The present application also provides a catheter positioning system. Figure 7 As shown, the catheter positioning system includes the above-mentioned catheter component 100, as well as an electrocardiogram device and a guide wire 200. The guide wire 200 is connected to the electrocardiogram device, and the guide wire 200 is inserted into the catheter component 100. The end of the guide wire 200 away from the electrocardiogram device is aligned with the first end 11 of the catheter component 100. The electrocardiogram device is used to locate the position of the end of the guide wire 200 away from the electrocardiogram device in the central vein.

[0079] By connecting the guide wire 200 to the electrocardiogram device, the position of the end of the guide wire 200 close to the first end 11 can be determined by utilizing the P wave changes on the electrocardiogram device. Since the relative positions of the guide wire 200 and the catheter 1 are fixed, the position of the first end 11 of the catheter 1 in the central vein can be controlled to avoid harm to the patient due to position deviation of the first end 11, thereby effectively improving the reliability of the closed infusion device.

[0080] In a specific implementation process, the guide wire 200 is a metal wire. Further, the guide wire 200 is made of nickel-titanium alloy, titanium and titanium alloy or stainless steel.

[0081] In one embodiment, if Figure 8As shown, a second scale 201 is provided along the length direction of the guide wire 200 at one end of the guide wire 200 away from the electrocardiogram device. By providing the second scale 201 on the guide wire 200, the distance between the end face of the first end 11 and the guide wire 200 can be quickly determined, thereby facilitating the improvement of the positioning efficiency and positioning accuracy of the catheter 1. Further, when the end of the guide wire 200 exceeds the first end 11, the second scale 201 can be used to quickly determine the distance value of the end of the guide wire 200 exceeding the end face of the first end 11, thereby facilitating the improvement of the positioning efficiency and positioning accuracy of the catheter 1. In the specific implementation process, the graduation value of the second scale 201 is 1 cm or 1 mm.

[0082] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A conduit member, characterized in that: include: A catheter (1), the catheter (1) comprising a first end (11) and a second end (12), the first end (11) being used for inserting into a central vein, the catheter (1) being provided with an infusion hole (13) running through the catheter (1) in its length direction, the infusion hole (13) being capable of allowing a guide wire (200) to pass therethrough; A fixator (2), the fixator (2) being detachably connected to the second end (12), and the fixator (2) being capable of fixing the guide wire (200).

2. The conduit member according to claim 1, wherein The fixer (2) comprises a fixing body (21), the fixing body (21) comprises a fixing shaft (211), the fixing shaft (211) can be inserted into the infusion hole (13), and the fixing shaft (211) is interference fit with the infusion hole (13).

3. The conduit member according to claim 2, characterized in that The fixed body (21) further comprises a fixed cap (212), wherein the fixed cap (212) is arranged at one end of the fixed shaft (211), the outer diameter of the fixed cap (212) is larger than the outer diameter of the fixed shaft (211), and the fixed cap (212) is used to abut against the second end (12).

4. The conduit member according to claim 2 or 3, characterized in that: The fixing body (21) is provided with a fixing hole (213), and the fixing hole (213) can allow the guide wire (200) to pass through, and the fixing hole (213) and the guide wire (200) are interference-fitted.

5. The conduit member according to claim 4, characterized in that The hole wall of the fixing hole (213) is provided with a flexible material layer.

6. The conduit member according to claim 2 or 3, characterized in that: The fixing body (21) is provided with a fixing hole (213) and a clamping hole (214) which are interconnected, the fixing hole (213) can be used for the guide wire (200) to pass through, and the diameter of the fixing hole (213) is larger than the diameter of the guide wire (200); The fixer (2) also includes a fixing clamp (22), and the fixing clamp (22) includes a clamp seat (221) and at least one clamping foot (222) arranged on the clamp seat (221). When the clamping foot (222) is inserted into the clamping hole (214), the clamping hole (214) presses the clamping foot (222) inwardly, so that the clamping foot (222) clamps the guide wire (200).

7. The conduit member according to claim 6, wherein: The number of the clamping feet (222) is three, and the three clamping feet (222) are distributed at equal intervals in the circumferential direction of the clamping seat (221).

8. The conduit member according to any one of claims 1 to 3, characterized in that: The first end (11) of the catheter (1) is provided with a first scale (14) along the length direction of the catheter (1).

9. A catheter positioning system, characterized in that: include: A conduit member (100), wherein the conduit member (100) is the conduit member (100) according to any one of claims 1 to 8; Electrocardiogram equipment; A guide wire (200), the guide wire (200) is connected to the electrocardiogram device, the guide wire (200) is inserted into the catheter component (100), and one end of the guide wire (200) away from the electrocardiogram device is aligned with the first end (11) of the catheter component (100), and the electrocardiogram device is used to locate the position of the end of the guide wire (200) away from the electrocardiogram device in the central vein.

10. The catheter positioning system according to claim 9, characterized in that: An end of the guide wire (200) away from the electrocardiogram device is provided with a second scale (201) along the length direction of the guide wire (200).

Images