Medical punch-through device

Abstract

The utility model belongs to the technical field of medical instruments, and provides a medical penetrating device which comprises a catheter, a guide wire cavity used for allowing a guide wire to penetrate through is formed in the catheter, a guide wire outlet communicated with the guide wire cavity is formed in the catheter, a guide wire inlet communicated with the guide wire cavity is formed in the farthest end of the catheter, and the guide wire inlet is communicated with the guide wire cavity. The near end and the far end of the catheter are a connecting part and a spine part respectively; and the reinforcing piece is embedded in the spine part, and the rigidity of the spine part can be enhanced by the reinforcing piece. According to the medical penetrating device provided by the invention, the reinforcing piece is embedded in the spine part, so that the rigidity of the spine part is enhanced, and the medical penetrating device can penetrate through a relatively hard and narrow lesion area.

Description

Technical Field

[0001] The present application belongs to the technical field of medical devices, and more specifically, to a medical penetration device. Background Art

[0002] With the development of coronary intervention surgery technology, more and more devices have been developed for use in percutaneous coronary intervention (PCI) surgery. Among them, the microcatheter is a catheter specially used for complex coronary lesions or total occlusion lesions. Its main function is to assist the guidewire to pass through complex lesions or total occlusion lesions.

[0003] The spike portion of the microcatheter in the prior art is mostly a conical structure formed of pure polymer material. The microcatheter made of pure polymer material has the advantages of good bending performance and easy processing and forming. However, when facing some harder or longer total occlusion lesions, the spike portion of the microcatheter made of pure polymer material is difficult to penetrate the stenotic lesion, or the spike portion of the microcatheter has entered the stenotic lesion, but because the material of the spike portion is not hard enough or the structure of the spike portion is limited, it can only enter a part of the stenotic lesion and cannot pass through the entire lesion area, resulting in the inability to assist the guide wire to pass through the stenotic lesion area. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a medical penetration device to solve the technical problem that the microcatheter in the prior art is made of polymer materials and cannot completely penetrate the hard and narrow lesion area.

[0005] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide a medical penetration device, including: a catheter, a guidewire cavity for a guidewire to pass through is formed in the catheter, a guidewire outlet and a guidewire inlet connected to the guidewire cavity are opened on the catheter, the two ends of the catheter are a connecting part and a spike part, respectively, and the guidewire inlet is opened on the side of the spike part away from the connecting part; a reinforcement piece, the reinforcement piece is embedded in the spike part, and the reinforcement piece can enhance the rigidity of the spike part.

[0006] The beneficial effect of the medical penetration device provided by the present application is that: compared with the prior art, the medical penetration device of the present application is provided with a guidewire cavity in the catheter, and a reinforcement piece is embedded in the spike portion at the farthest end of the catheter. In cardiovascular interventional surgery, when clinical operators face vascular stenosis lesions that are difficult for guidewires or microcatheters to pass through, they often become helpless, resulting in an embarrassing situation in which the surgery cannot continue. The medical penetration device of the present application is embedded with a reinforcement piece at the spike portion at the far end of the catheter. The reinforcement piece can increase the rigidity of the spike portion, so that the spike portion can easily penetrate the lesion area with higher hardness, and the guidewire or other instruments can smoothly pass through the stenotic lesion along the channel established by the medical penetration device of the present application.

[0007] In one embodiment, the reinforcement member includes an inlay portion and a cutting portion which are integrally formed with each other, the inlay portion is inlaid in the spike portion, and the cutting portion is exposed on the outer side surface of the spike portion.

[0008] In one embodiment, the reinforcement member is in a columnar structure, and the cutting portion and the inlaying portion are both arranged along the length of the outer side surface of the spike portion.

[0009] In one embodiment, the reinforcement member has a conical structure, and the cross-sectional area of ​​the reinforcement member gradually decreases toward the guide wire inlet.

[0010] In one embodiment, the reinforcement member is an annular structure, and the central axis of the reinforcement member is colinear with the central axis of the spike portion.

[0011] In one embodiment, the outer diameter of the catheter gradually decreases from the connecting portion to the spike portion.

[0012] In one embodiment, the guide wire outlet is opened on the peripheral side wall of the catheter.

[0013] In one of the embodiments, a guiding surface is provided on the connecting portion, the guiding surface is inclined toward the guidewire outlet, and the guiding surface is used to guide the guidewire to leave the guidewire cavity from the guidewire outlet.

[0014] In one embodiment, a pushing rod is further included, wherein the distal end of the pushing rod is connected to the connecting portion of the proximal end of the catheter.

[0015] In one embodiment, a catheter seat is also included to facilitate the surgical operator to manipulate the penetration device, and the catheter seat is connected to the proximal end of the pushing rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 A schematic diagram of the three-dimensional structure of a medical penetration device provided in an embodiment of the present application;

[0018] Figure 2 for Figure 1 A cross-sectional view of the medical penetration device shown in ;

[0019] Figure 3A cross-sectional view of the spike portion of the medical penetration device provided in the first embodiment of the present application;

[0020] Figure 4 for Figure 3 A cross-sectional structural diagram of the medical penetration device along line AA shown;

[0021] Figure 5 A cross-sectional view of a spike portion of a medical penetration device provided in a second embodiment of the present application;

[0022] Figure 6 for Figure 5 A cross-sectional structural diagram of the medical penetration device shown along line BB;

[0023] Figure 7 A cross-sectional view of a spike portion of a medical penetration device provided in a third embodiment of the present application;

[0024] Figure 8 for Figure 7 The cross-sectional structural diagram of the medical penetration device taken along line CC is shown.

[0025] Among them, the reference numerals in the figure are:

[0026] 10. catheter; 101. guidewire cavity; 102. guidewire outlet; 103. guidewire inlet; 11. connecting portion; 12. spike portion; 13. guide surface;

[0027] 20. reinforcement part; 21. inlay part; 22. cutting part;

[0028] 30. Push rod;

[0029] 40. Catheter seat. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0035] Please also read Figures 1 to 8 The medical penetration device provided in the embodiment of the present application is now described. The medical penetration device comprises a catheter 10 and a reinforcement member 20.

[0036] A guidewire cavity 101 is provided in the catheter 10 for allowing the guidewire to pass through. A guidewire outlet 102 and a guidewire inlet 103 connected to the guidewire cavity 101 are provided on the catheter 10. The proximal end and the distal end of the catheter 10 are respectively a connecting portion 11 and a spike portion 12. The guidewire inlet 103 is provided at the farthest end of the catheter 10. A reinforcement member 20 is embedded in the spike portion 12, and the reinforcement member 20 can enhance the rigidity of the spike portion 12.

[0037] For example, Figures 1 to 8 As shown, the guidewire cavity 101 is a cylindrical structure, and the guidewire outlet 102 and the guidewire inlet 103 are respectively located at the proximal end and the distal end of the guidewire cavity 101, wherein the guidewire outlet 102, the guidewire cavity 101 and the guidewire inlet 103 form a through channel for the guidewire to pass through, and the connecting portion 11 in the catheter 10 is used to connect with other components, and the spike portion 12 is similar to a ring-shaped knife-like structure, and the spike portion 12 is close to the lesion area along the length of the catheter 10. A circular opening can be cut in the lesion area, and then the entire catheter 10 passes through the lesion area. The reinforcement 20 is embedded in the spike portion 12, so that the spike portion 12 is not easily deformed or damaged when passing through the lesion area.

[0038] The catheter 10 of the present application is made of polymer materials, which can be one or a mixture of silicone, polyurethane, nylon, PE, PP, etc. The reinforcement 20 is made of micro-metal materials, wherein the micro-metal structural material can be stainless steel, cobalt alloy, magnesium alloy, nickel-titanium alloy, etc.

[0039] It can be understood that the central axis of the reinforcement member 20 and the central axis of the spike portion 12 are arranged coplanarly and are not perpendicular to each other.

[0040] Specifically, Figure 3 As shown, it is the first embodiment of the present application; Figure 3 The cross-sectional plane in FIG. 1 just passes through the central axis of the reinforcement member 20 and the central axis of the spike portion 12 of the first embodiment. Figure 5 As shown, it is the second embodiment of the present application; Figure 5 The cross-sectional plane in FIG. 2 just passes through the central axis of the reinforcement member 20 and the central axis of the spike portion 12 of the second embodiment. Figure 7 The cross-sectional plane in the figure just passes through the central axis of the reinforcement 20 of the third embodiment and the central axis of the spike portion 12. When working, the spike portion 12 needs to approach the lesion area along the direction of the central axis of the catheter 10, and the central axis of the reinforcement 20 also forms an acute angle with the moving direction or is parallel to each other, so the reinforcement 20 can provide support for the spike portion 12 when cutting the lesion area to avoid deformation and damage.

[0041] Compared with the prior art, the medical penetration device provided by the present application has a guidewire cavity 101 formed in the catheter 10, a guidewire outlet 102 and a guidewire inlet 103 interconnected with the guidewire cavity 101 are provided on the catheter 10, and a reinforcement piece 20 is embedded in the spike portion 12 at the distal end of the catheter 10. In cardiovascular interventional surgery, when clinical operators face vascular stenosis lesions that are difficult for guidewires or microcatheters to pass through, they often become helpless, resulting in an embarrassing situation in which the surgery cannot continue. The medical penetration device of the present application is embedded with a reinforcement piece 20 at the spike portion 12 at the distal end of the catheter 10. The reinforcement piece 20 can increase the rigidity of the spike portion 12, so that the spike portion 12 can easily penetrate the lesion area with higher hardness, and the guidewire or other instruments can smoothly pass through the stenotic lesion along the channel established by the medical penetration device of the present application.

[0042] In the first embodiment of this application, please refer to Figure 3 and Figure 4 The reinforcing member 20 includes an inlay portion 21 and a cutting portion 22 which are integrally formed with each other. The inlay portion 21 is inlaid in the spike portion 12 , and the cutting portion 22 is exposed on the outer side of the spike portion 12 .

[0043] Specifically, the inlay portion 21 and the cutting portion 22 are an integrally formed structure, wherein the inlay portion 21 is mainly used to improve the rigidity of the spike portion 12, and the cutting portion 22 is mainly used to cut the lesion area when the spike portion 12 passes through the target lesion area, similar to the cutter arranged on the outer side of the spike portion 12. By configuring the spike portion 12 to be composed of the inlay portion 21 and the cutting portion 22, the overall rigidity of the spike portion 12 can be increased while the spike portion 12 has the dual effects of cutting, tearing and penetrating, thereby quickly forming a channel in the lesion area for the guide wire to pass through.

[0044] In the first embodiment of this application, please refer to Figure 3 The reinforcing member 20 is a columnar structure, and the cutting portion 22 and the inlaying portion 21 are both arranged along the length of the outer side surface of the spike portion 12 in the extension direction.

[0045] Specifically, the reinforcing member 20 is a columnar structure, and the overall force of the reinforcing member 20 of the columnar structure is more stable, thereby providing a more stable stress support for the entire spike portion 12, and preventing the spike portion 12 from being deformed or damaged during operation. At the same time, the reinforcing member 20 can be a multi-prism structure. In this embodiment, the reinforcing member 20 is a triangular prism, and one of the edges of the triangular prism is convexly arranged outside the spike portion 12 to form a cutting portion 22, and the rest of the triangular prism is embedded in the spike portion 12 to form an inlay portion 21. By arranging the cutting portion 22 and the inlay portion 21 along the length of the outer side surface of the spike portion 12 in the extension direction, when the spike portion 12 passes through the lesion area, the cutting portion 22 can cut the surrounding area along the penetration direction of the spike portion 12, thereby improving the treatment efficiency of the entire medical penetration device.

[0046] In the second embodiment of this application, please refer to Figure 5 and Figure 6 The reinforcement member 20 has a conical structure, and the cross-sectional area of ​​the reinforcement member 20 gradually decreases toward the direction approaching the guide wire inlet 103 .

[0047] Specifically, the cross-sectional area of ​​the spike portion 12 also gradually decreases toward the direction approaching the guide wire entrance 103, so that the spike portion 12 can pass through the diseased area like a knife blade. At the same time, the reinforcement will also be arranged into a conical structure, and the cross-sectional area of ​​the reinforcement 20 also gradually decreases toward the direction approaching the guide wire entrance 103, so that the reinforcement 20 can be more adapted to the shape of the spike portion 12, thereby enhancing the supporting effect of the spike portion 12.

[0048] In the third embodiment of this application, please refer to Figure 7 and Figure 8 The reinforcement member 20 has an annular structure, and the central axis of the reinforcement member 20 is colinear with the central axis of the spike portion 12 .

[0049] Specifically, the reinforcement 20 is an annular structure. At the same time, the reinforcement 20 can be a conical annular structure or a cylindrical annular structure. The reinforcement 20 is completely wrapped in the polymer material of the catheter 10, and the metal ring is completely wrapped in the polymer material. The projection of the reinforcement 20 in the direction perpendicular to its central axis can be in the shape of W, V, S, Z, etc. In this embodiment, the projection of the reinforcement 20 in the direction perpendicular to its central axis is in the shape of W. The reinforcement 20 is a conical annular structure, and its shape is adapted to the taper of the outer side of the spike portion 12, thereby enhancing the support effect on the spike portion 12 and further improving the rigidity of the entire spike portion 12.

[0050] In the third embodiment of this application, please refer to Figure 1 and Figure 2 The outer diameter of the catheter 10 gradually decreases from the connecting portion 11 to the spike portion 12 .

[0051] Specifically, the outer diameter of the guidewire inlet 103 in the catheter 10 is the smallest, and the outer diameter of the catheter 10 gradually increases toward the connecting portion 11. By setting the catheter 10 as a whole in a conical structure, the catheter 10 can more accurately penetrate the target diseased area, thereby improving the accuracy of the operation.

[0052] In one embodiment of the present application, please refer to Figure 1 and Figure 2 The guide wire outlet 102 is opened on the peripheral side wall of the catheter 10 .

[0053] Specifically, since the guidewire outlet 102 is provided on the peripheral side wall of the catheter 10, the guidewire cavity 101 only needs to extend to the position of the guidewire outlet 102 in the length direction, and the length of the guidewire cavity 101 can be greatly shortened. After the medical penetration device of the present application completes penetration of the stenotic lesion and successfully escorts the guidewire through the stenotic lesion, when it is necessary to withdraw the medical penetration device of the present application from the patient's body and replace it with other interventional surgical instruments, the shorter guidewire cavity 101 can realize the rapid withdrawal of the medical penetration device of the present application, and the rapid exchange of interventional surgical instruments, thereby saving operation time and improving work efficiency.

[0054] In one embodiment of the present application, please refer to Figure 1 and Figure 2 A guiding surface 13 is provided on the connecting portion 11 , and the guiding surface 13 is inclined toward the guide wire outlet 102 . The guiding surface 13 is used to guide the guide wire to leave the guide wire cavity 101 from the guide wire outlet 102 .

[0055] Specifically, the extending direction of the guidewire outlet 102 is perpendicular to the extending direction of the guidewire cavity 101, and the guide surface 13 is mainly used to convert the moving direction of the guidewire from the guidewire cavity 101 to the opening direction of the guidewire outlet 102, so as to guide the guidewire to extend from the guidewire outlet 102 to the outside of the guidewire cavity 101, thereby improving the efficiency of the guidewire passing through the penetration device and further improving work efficiency.

[0056] In one embodiment of the present application, please refer to Figure 1 and Figure 2 The medical penetration device also includes a pushing rod 30 , the distal end of the pushing rod 30 is connected to the connecting portion 11 at the proximal end of the catheter 10 .

[0057] Specifically, the push rod 30 and the catheter 10 can be an integrally formed polymer structure, and the push rod 30 can also be made of other materials and spliced ​​to the connecting part 11 of the catheter 10. By connecting the push rod 30 to the connecting part 11 of the catheter 10, the length of the entire medical penetration device can be increased, so that the user can hold the push rod 30 with his hands or an external device to drive the catheter 10 to perform a penetration operation on the diseased area.

[0058] In one embodiment of the present application, please refer to Figure 1 and Figure 2 The medical penetration device also includes a catheter seat 40 which is convenient for the surgical operator to control the penetration device, and the catheter seat 40 is connected to the proximal end of the pushing rod 30.

[0059] Specifically, the distal end of the catheter seat 40 is connected to the proximal end of the push rod 30. By providing the catheter seat 40 on the medical penetration device, it is convenient for the staff to hold the entire medical penetration device, thereby improving the convenience of operation.

[0060] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for the purpose of explaining the principles of the present invention, and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanation here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementation methods of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. A medical penetration device, characterized in that: include: A catheter, wherein a guidewire cavity is provided in the catheter for passing a guidewire through, and a guidewire outlet and a guidewire inlet are provided on the catheter and are communicated with the guidewire cavity, the proximal end and the distal end of the catheter are a connecting portion and a spike portion respectively, and the guidewire inlet is located at the most distal end of the catheter; A reinforcing piece is embedded in the spike portion, and the reinforcing piece can enhance the rigidity of the spike portion.

2. The medical penetration device according to claim 1, characterized in that: The reinforcing member comprises an inlay portion and a cutting portion which are integrally formed with each other, the inlay portion is inlaid in the spike portion, and the cutting portion is exposed on the outer side surface of the spike portion.

3. The medical penetration device according to claim 2, characterized in that: The reinforcing member is in a columnar structure, and the cutting portion and the inlaying portion are both arranged along the length of the outer side surface of the spike portion in an extending direction.

4. The medical penetration device according to claim 1, characterized in that: The reinforcement piece is in a conical structure, and the cross-sectional area of ​​the reinforcement piece gradually decreases toward the direction approaching the guide wire inlet.

5. The medical penetration device according to claim 1, characterized in that: The reinforcement member is an annular structure, and the central axis of the reinforcement member is colinear with the central axis of the spike portion.

6. The medical penetration device according to any one of claims 1 to 5, characterized in that: The outer diameter of the catheter gradually decreases from the connecting portion to the spike portion.

7. The medical penetration device according to any one of claims 1 to 5, characterized in that: The guide wire outlet is opened on the peripheral side wall of the catheter.

8. The medical penetration device according to claim 7, characterized in that: The connecting portion is provided with a guiding surface, the guiding surface is inclined toward the guide wire outlet, and the guiding surface is used to guide the guide wire to leave the guide wire cavity from the guide wire outlet.

9. The medical penetration device according to any one of claims 1 to 5, characterized in that: It also includes a pushing rod, the distal end of which is connected to the connecting portion of the proximal end of the catheter.

10. The medical penetration device according to claim 9, characterized in that: It also includes a catheter seat which is convenient for the surgical operator to control the penetration device, and the catheter seat is connected to the proximal end of the pushing rod.

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