A puncture catheter for simulating the cavity of a false lumen of a coronary occlusive lesion in a department of cardiology

Abstract

The utility model provides a kind of puncture catheter of cardiology coronary artery occlusion pathological false cavity real cavity, belong to the technical field of cardiology intervention operation catheter, including the main pipe body with inner passage, the main pipe body includes straight pipe section and elbow section, the inlet of straight pipe section is as operating end, the elbow section's bending is adjustable, its export is set as wedge-shaped mouth, and wedge-shaped mouth X ray is visible.The utility model in which straight pipe section provides stable operation push fulcrum for operator, the setting of elbow section makes catheter export have specific directivity, operator can make elbow section align real cavity direction in the complex space of false cavity by rotating straight pipe section, to establish a stable, towards real cavity direction's puncture passage and support platform for guide wire, greatly improve the direction controllability of puncture.Secondly, wedge-shaped mouth design is also conducive to improving the success rate of puncture.

Description

Technical Field

[0001] This utility model relates to the field of interventional catheter technology in cardiology, and in particular to a puncture catheter for returning the false lumen to the true lumen in coronary artery occlusion lesions in cardiology. Background Technology

[0002] Chronic total occlusion of the coronary arteries is a challenging aspect of interventional cardiology. During percutaneous coronary intervention (PCI), there is a high probability that the guidewire will enter a false lumen formed under the intima when passing through the occluded segment. Once the guidewire enters the false lumen, safely and accurately re-entering it into the true lumen is crucial for the success of the procedure and remains a major clinical challenge.

[0003] Currently, clinical techniques for re-entering the true lumen from the false lumen largely depend on the operator's experience, the feel of the guidewire, and the performance of the instruments. Conventional microcatheters or support catheters are usually straight-tipped, with fixed shapes and poor adaptability, especially in terms of difficulty in adjusting direction. The catheter tip is difficult to stably align with the true lumen within the complex space of the false lumen. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a puncture catheter for returning the false lumen to the true lumen in coronary artery occlusion lesions in cardiology.

[0005] The technical solution adopted by this utility model is as follows: This application provides a puncture catheter for returning the false lumen to the true lumen in coronary artery occlusion lesions in cardiology, including a main body with an inner channel. The main body includes a straight section and a curved section. The inlet of the straight section serves as the operating end, and the outlet of the curved section is set as a wedge-shaped opening.

[0006] In some embodiments, an arc-shaped transition section is provided between the straight pipe section and the bend pipe section to form a smooth connection, and the diameter of the bend pipe section gradually decreases along its outlet direction.

[0007] In some embodiments, the bent pipe section is an arc-shaped pipe, with one end near the straight pipe section bending upwards to form a front bend, and the other end away from the straight pipe section bending upwards to form a rear bend.

[0008] In some embodiments, the horizontal chamfer of the rear bend is 15°-75°.

[0009] In some embodiments, at least the wedge-shaped opening is made of an X-ray visible material.

[0010] In some embodiments, the bent pipe section is a flexible pipe, the inlet of the straight pipe section is connected to an adjusting pipe, the adjusting pipe has an opening, a fixing plate is provided in the opening, the fixing plate has a slide rail along the axial direction of the adjusting pipe, a slider is slidably provided in the slide rail, an adjusting sleeve is rotatably provided outside the adjusting pipe, the adjusting sleeve and the slider are screwed together, the slider is provided with a traction wire connected to the outlet end of the bent pipe section, when the adjusting sleeve is rotated, the slider moves along the slide rail, and the bent pipe section is bent by the traction wire.

[0011] In some embodiments, a linkage ring is connected to the slider, the linkage ring is located on the outer ring of the adjusting tube, and its outer wall is provided with an external thread section, and the inner wall of the adjusting sleeve is provided with an internal thread section adapted to the external thread section.

[0012] In some embodiments, the slider is connected to a connecting plate on one side of the linkage ring, the connecting plate is provided with an indicator rod, and the adjusting tube is provided with scale markings along the moving path of the indicator rod to indicate the bending angle of the bending section.

[0013] In some embodiments, a holding tube is provided at the end of the regulating tube away from the straight pipe section, and the inner diameter of the holding tube is larger than the inner diameter of the straight pipe section.

[0014] In some embodiments, one end of the slide rail passes through the fixed plate, the slide rail is a cross-shaped channel, the slider is a matching cross shape, and the upper and lower end faces of the protrusions on both sides are provided with rotating parts.

[0015] The beneficial effects of this invention are as follows: The straight tube segment provides the operator with a stable fulcrum for pushing the catheter, while the curved tube segment gives the catheter outlet a specific directionality. The operator can rotate the straight tube segment to align the curved tube segment with the true lumen within the complex space of the false lumen, thereby establishing a stable puncture channel and support platform for the guidewire facing the true lumen, greatly improving the directional controllability of the puncture. Secondly, the wedge-shaped orifice design also helps to improve the success rate of the puncture. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0017] Figure 1 This is a schematic diagram of a puncture catheter for returning the false lumen to the true lumen in coronary artery occlusion lesions according to this utility model. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of a puncture catheter for returning the false lumen to the true lumen in coronary artery occlusion lesions according to this utility model. Figure 2 ;

[0019] Figure 3 This is a cross-sectional view of a puncture catheter for returning the false lumen to the true lumen in coronary artery occlusion lesions in cardiology, according to this utility model.

[0020] Figure 4 This is a partial cross-sectional view of a puncture catheter for returning the false lumen to the true lumen in coronary artery occlusion lesions according to the present invention. Figure 1 ;

[0021] Figure 5 This is a partial cross-sectional view of a puncture catheter for returning the false lumen to the true lumen in coronary artery occlusion lesions according to the present invention. Figure 2 ;

[0022] Figure 6 This is a partial schematic diagram of a puncture catheter for returning the false lumen to the true lumen in coronary artery occlusion lesions in cardiology according to this utility model;

[0023] In the diagram: 1-Main pipe body, 11-Inner channel, 12-Straight pipe section, 13-Bend pipe section, 131-Wedge-shaped opening, 132-Front bend, 133-Rear bend, 14-Arc-shaped transition section, 2-Adjusting pipe, 21-Opening, 22-Fixed plate, 23-Slide rail, 24-Scale marking, 3-Slider, 4-Adjusting sleeve, 5-Traction wire, 6-Linkage ring, 7-Connecting plate, 8-Indicator rod, 9-Holding pipe. Detailed Implementation

[0024] The following description provides specific application scenarios and requirements for this specification, intended to enable those skilled in the art to make and use the contents of this specification. Various partial modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but rather to the widest scope consistent with the claims.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "longitudinal", "lateral", "radial", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element or component to have a specific orientation, or to be constructed and operated in a specific orientation.

[0026] It should be noted that the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are only used to distinguish different components and should not be construed as limiting the embodiments of this application.

[0027] It should be noted that the terms "installation," "setup," "equipped with," "connection," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral structures; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two devices, components, or parts.

[0028] It should be noted that the terms "in some embodiments," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in some embodiments," "exemplarily," or "for example" should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "in some embodiments," "exemplarily," and "for example" is intended to present the relevant concepts in a specific manner, meaning that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of this application.

[0029] Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] Regarding the accompanying drawings of this application, it should be clearly understood that the drawings are for illustrative and descriptive purposes only and are not intended to limit the scope of this specification. It should also be understood that the drawings are not necessarily drawn to scale.

[0031] Conventional microcatheters or support catheters are usually straight-tipped, with fixed shapes and poor adaptability. In particular, they are difficult to adjust in direction, and the catheter tip is difficult to stably align with the true lumen within the complex space of the false lumen.

[0032] Based on the above issues, such as Figures 1 to 6 As shown, this utility model proposes a puncture catheter for returning the false lumen to the true lumen in coronary artery occlusion lesions in cardiology. It includes a main tube body 1, with a through-channel 11 for delivering guidewires and other therapeutic instruments. The main tube body 1 includes a straight section 12 and a curved section 13. The inlet of the straight section 12 serves as the operating end, providing a stable fulcrum for the operator to perform precise punctures within the false lumen. The curved section 13 adapts to the tortuous anatomical path of the false lumen, and its tip can be guided and stably supported near the expected puncture point, creating a foundation for subsequent directional puncture.

[0033] Preferably, the diameter of the curved section 13 is designed with a gradual decrease, which is beneficial for the catheter outlet to reach the distal end of the false lumen. The outlet of the curved section 13 is set as a wedge-shaped opening 131, with the bevel of the wedge-shaped opening 131 facing the side of the blood vessel lumen. When used for puncture, it can efficiently convert the axial force of the operator pushing the guidewire into a puncture force perpendicular to the false lumen-true lumen septum tissue. This is particularly beneficial for penetrating the tough fibrous cap or subintimal septum in chronic occlusive lesions, thereby improving puncture efficiency and reducing slippage in loose tissue.

[0034] In some embodiments, an arc-shaped transition section 14 is provided between the straight tube section 12 and the curved tube section 13. The arc-shaped transition section 14 is integrally formed with the straight tube section 12 and the curved tube section 13 to form a smooth connection, which can avoid the catheter getting stuck when pushed into the blood vessel and reduce vascular damage.

[0035] In some embodiments, the curved tube segment 13 is an arc-shaped tube, with its end near the straight tube segment 12 curving upwards to form a forward curved portion 132, and its end away from the straight tube segment 12 curving upwards to form a backward curved portion 133. The bending radius of the forward curved portion 132 is larger than that of the backward curved portion 133. Its arc design makes it easier to enter the coronary artery through the aortic arch and to travel deep within the coronary vascular tree, thereby making it more likely to reach the distal end of the false lumen and creating conditions for re-entry puncture from a more advantageous position.

[0036] In some embodiments, the horizontal cut angle of the posterior curved portion 133 is 15°-75°, and a suitable cut angle specification can be selected according to the coronary artery ostium angle of different patients, providing different specifications to adapt to individual vascular anatomy differences and improve the adaptability and positioning ability of the catheter to reach different false lumens. Figure 3 As shown, the horizontal tangent A is the angle between the tangent at the end of the rear bend 133 and the horizontal line, and the horizontal line corresponds to the straight pipe section 12.

[0037] In some embodiments, at least the wedge-shaped orifice is made of an X-ray visible material, such as barium-containing polyurethane, to facilitate precise intraoperative fluoroscopy positioning of the catheter tip and puncture direction.

[0038] In some embodiments, the bent pipe section 13 is a flexible pipe, and an adjusting pipe 2 is fixedly connected to the inlet of the straight pipe section 12. The adjusting pipe 2 is coaxially arranged with the straight pipe section 12, and one end of the adjusting pipe 2 is sleeved outside the straight pipe section 12. An opening 21 is provided on the side wall of the adjusting pipe 2, and a fixing plate 22 is fixedly arranged in the opening 21. A slide 23 is provided on the fixing plate 22 along the axial direction of the adjusting pipe 2, and a slider 3 is slidably arranged in the slide 23. An adjusting sleeve 4 is rotatably sleeved on the outer wall of the adjusting pipe 2. Connecting protrusions are provided at both ends of the adjusting pipe 2 at the opening 21. The adjusting sleeve 4 is connected to the connecting protrusions by a rotating component, such as a bearing, ball bearing, or sliding sleeve. A retaining ring is provided at the outer end of the connecting protrusion.

[0039] The adjusting sleeve 4 is screwed to the slider 3. A traction wire 5 is fixedly connected to the slider 3. The traction wire 5 extends along the inner channel 11 to the outlet end of the bent pipe section 13 and is fixedly connected to the inner wall of the bent pipe section 13.

[0040] During operation, rotating the adjusting sleeve 4 causes the slider 3 to move away from the bend section 13 along the slide 23 via a screw drive. The slider 3 pulls the traction wire 5, causing the flexible bend section 13 to bend towards the traction wire 5, thereby adjusting the bending angle of the bend section 13. Reverse rotation of the adjusting sleeve 4 causes the slider 3 to move closer to the bend section 13, the traction wire 5 to relax, and the bend section 13 to return to its original shape under its own elasticity.

[0041] This allows the operator to adjust the bending angle of the curved tube segment 13, enabling the operator to dynamically adjust the direction of the catheter tip within the false lumen, actively find and aim at the optimal puncture path, and greatly enhance the operational flexibility in dealing with complex and irregular false lumens.

[0042] In some embodiments, a linkage ring 6 is fixedly connected to one side of the slider 3. The linkage ring 6 is sleeved on the outer ring of the adjusting tube 2 and can slide along the axial direction of the adjusting tube 2 along with the slider 3. The outer wall of the linkage ring 6 is provided with an external thread section, and the inner wall of the adjusting sleeve 4 is provided with an internal thread section that matches the external thread section. Through the cooperation of the external thread section and the internal thread section, the helical transmission between the adjusting sleeve 4 and the slider 3 is realized.

[0043] In some embodiments, the slider 3 and the linkage ring 6 are fixedly connected by a connecting plate 7 on the side near the straight pipe section 12. Specifically, the slider 3 and the linkage ring 6 are respectively provided with connecting holes, and are fixed by bolts passing through the corresponding through holes on the connecting plate 7.

[0044] Preferably, the slider 3 and the linkage ring 6 are provided with a groove on the side near the straight pipe section 12 that is compatible with the connecting plate 7.

[0045] An indicator plate is provided on the connecting plate 7 facing the straight pipe section 12. A slot is opened at the end of the connecting protrusion ring near the straight pipe section 12. An indicator rod 8 extends from the indicator plate along the axial direction of the adjusting pipe 2. The indicator rod 8 extends out of the slot and is provided with an indicator arrow. A scale mark 24 is provided on the outer wall of the adjusting pipe 2 along the moving path of the indicator rod 8. The scale mark 24 corresponds to the bending angle of the curved pipe section 13, which makes it easy for the operator to accurately control the bending degree of the curved pipe section 13.

[0046] In some embodiments, a holding tube 9 is fixedly connected to one end of the adjusting tube 2 away from the straight tube section 12. The inner diameter of the holding tube 9 is larger than the inner diameter of the straight tube section 12, which facilitates surgical operation.

[0047] The outer wall of the grip tube 9 is provided with anti-slip texture, which makes it easier for the operator to grip and operate, and improves the stability of operation.

[0048] In some embodiments, one end of the slide 23 passes through the fixing plate 22 to facilitate the assembly of the slider 3. The slide 23 is a cross-shaped channel, and the slider 3 is a cross-shaped structure adapted to the cross-shaped channel, which can prevent the slider 3 from rotating within the slide 23 and ensure the stability of the tension direction of the traction wire 5.

[0049] The upper and lower end faces of the protrusions on both sides of the slider 3 are provided with rotating components, which are balls or rollers, to reduce the friction between the slider 3 and the slide 23 and make the adjustment process smoother.

[0050] In summary, after reading this detailed disclosure, those skilled in the art will understand that the foregoing detailed disclosure is presented by way of example only and is not restrictive. Although not explicitly stated herein, those skilled in the art will understand that the requirements of this application encompass various reasonable changes, improvements, and modifications to the embodiments. These changes, improvements, and modifications are intended to be made by this application and are within the spirit and scope of the exemplary embodiments of this application.

[0051] Furthermore, it should be understood that in the foregoing description of the embodiments of this application, various features are combined in a single embodiment, drawing, or description for the purpose of simplifying the understanding of a feature. However, this does not mean that the combination of these features is necessary, and those skilled in the art may readily identify some of the devices as separate embodiments when reading this application. That is, the embodiments in this application can also be understood as an integration of multiple sub-embodiments. It is also valid when each sub-embodiment contains fewer than all the features of a single foregoing disclosed embodiment.

[0052] Finally, it should be understood that the embodiments disclosed herein are illustrative of the principles of the embodiments of this application. Other modified embodiments are also within the scope of this application. Therefore, the embodiments disclosed herein are merely examples and not limitations. Those skilled in the art can adopt alternative configurations to implement the applications in this application based on the embodiments in this application. Therefore, the embodiments of this application are not limited to the embodiments precisely described in the application.

Claims

1. A puncture catheter for returning the false lumen to the true lumen in coronary artery occlusion lesions in cardiology, characterized in that, It includes a main pipe with an internal channel, the main pipe comprising a straight pipe section and a curved pipe section, the inlet of the straight pipe section serving as the operating end, and the outlet of the curved pipe section being configured as a wedge-shaped opening.

2. The puncture catheter for returning the false lumen to the true lumen in coronary artery occlusion lesions according to claim 1, characterized in that, An arc-shaped transition section is provided between the straight pipe section and the bend pipe section to form a smooth connection, and the diameter of the bend pipe section gradually decreases along its outlet direction.

3. The puncture catheter for returning the false lumen to the true lumen in coronary artery occlusion lesions according to claim 1, characterized in that, The curved pipe section is an arc-shaped pipe, with the end closest to the straight pipe section bending upwards to form the front curved section, and the end furthest from the straight pipe section bending upwards to form the rear curved section.

4. The puncture catheter for returning the false lumen to the true lumen in coronary artery occlusion lesions according to claim 3, characterized in that, The horizontal chamfer of the rear bend is 15°-75°.

5. The puncture catheter for returning the false lumen to the true lumen in coronary artery occlusion lesions according to claim 1, characterized in that, At least the wedge-shaped opening is made of an X-ray visible material.

6. The puncture catheter for returning the false lumen to the true lumen in coronary artery occlusion lesions according to claim 1, characterized in that, The bent pipe section is a flexible pipe. The inlet of the straight pipe section is connected to an adjusting pipe. An opening is made on the adjusting pipe, and a fixing plate is installed inside the opening. A slide is made on the fixing plate along the axial direction of the adjusting pipe. A slider is slidably installed in the slide. An adjusting sleeve is rotatably installed outside the adjusting pipe. The adjusting sleeve and the slider are screwed together. A traction wire is provided on the slider and connected to the outlet end of the bent pipe section. When the adjusting sleeve is rotated, the slider moves along the slide and pulls the bent pipe section to bend through the traction wire.

7. The puncture catheter for returning the false lumen to the true lumen in coronary artery occlusion lesions according to claim 6, characterized in that, The slider is connected to a linkage ring, which is located on the outer ring of the adjusting tube. The outer wall of the linkage ring is provided with an external thread section, and the inner wall of the adjusting sleeve is provided with an internal thread section that matches the external thread section.

8. The puncture catheter for returning the false lumen to the true lumen in coronary artery occlusion lesions according to claim 7, characterized in that, The slider is connected to a connecting plate on one side of the linkage ring. An indicator rod is provided on the connecting plate. A scale mark is provided on the adjusting tube along the moving path of the indicator rod to indicate the bending angle of the bending section.

9. The puncture catheter for returning the false lumen to the true lumen in coronary artery occlusion lesions according to claim 6, characterized in that, A holding tube is provided at the end of the regulating tube away from the straight pipe section, and the inner diameter of the holding tube is larger than the inner diameter of the straight pipe section.

10. The puncture catheter for returning the false lumen to the true lumen in coronary artery occlusion lesions according to claim 6, characterized in that, One end of the slide rail passes through the fixed plate. The slide rail is a cross-shaped channel. The slider is a matching cross shape, and the upper and lower end faces of the protrusions on both sides are provided with rotating parts.

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