Puncture needle and intervention device

Abstract

The utility model discloses a puncture needle and an intervention device. A puncture needle includes: a tube body including a tube cavity; the needle head is provided with a needle cavity extending in the length direction of the needle head, one end of the needle head is connected with the tube body, the other end of the needle head comprises a blade face and a transition face which are mutually connected to form a tip, the blade face extends parallel to the axis of the tube body, the transition face is in circumferential transition connection with the blade face, the blade face is provided with a first opening, and the needle cavity is communicated with the first opening and the tube cavity. The problem that an existing puncture needle cuts and damages biological tissue is solved. According to the embodiment of the invention, the tip end formed by the transition surface and the blade surface punctures the biological tissue, and the blade surface is parallel to the axis of the tube body, so that the biological tissue can be prevented from being cut by the opening of the blade surface, the damage to the biological tissue is reduced, the puncture resistance is reduced, and meanwhile, the blockage risk of the cut biological tissue to the tube cavity is reduced; the puncture success rate is improved.

Description

Technical Field

[0001] This application belongs to the field of medical devices, and particularly relates to a puncture needle and an intervention device. Background Art

[0002] A puncture needle is a medical device used for tissue sampling and injection treatment of various organs such as the kidney, liver, lung, breast, thyroid, prostate, pancreas, testis, uterus, ovary, and body surface in minimally invasive surgery. The development history of the puncture needle can be traced back to the 17th century, and the puncture needles used by modern doctors are developed on the basis of intravenous infusion needles and injection needles.

[0003] There are various ways to classify puncture needles, including classification by the number of uses, by application function, by needle tube structure, by needle tip structure, and by auxiliary equipment. Common types of puncture needles include biopsy puncture needles, injection puncture needles (interventional puncture needles), drainage puncture needles, etc. The specifications of puncture needles also have different representation methods. Domestic needles use numbers to represent specifications, while foreign needles use Gauge to represent the pipe diameter.

[0004] The main functions of the puncture needle are twofold: one is to place a catheter for drainage after puncture. For example, when there is pleural or peritoneal effusion or infection in the human body, pus or exudate can be aspirated through puncture, and a drainage tube can be inserted along the puncture needle for drainage; the other is to puncture a small amount of tissue for pathological examination or cytological examination to clarify the nature of the lesion.

[0005] When the cutting edge of the existing puncture needle penetrates into biological tissue, it has a cutting effect on the biological tissue, cutting off the tissue in the shape of the opening of the cutting edge of the biological tissue, thereby increasing the damage to the biological tissue. Summary of the Utility Model

[0006] The embodiments of this application provide a puncture needle and an intervention device, which can reduce the cutting damage of the cutting edge of the puncture needle to tissues such as the skin.

[0007] On the one hand, the embodiments of this application provide a puncture needle, including: a tube body, the tube body includes a lumen; a needle head, the needle head has a needle lumen extending along its own length direction, one end of the needle head is connected to the tube body, the other end of the needle head includes a cutting edge and a transition surface that are connected to form a tip, the cutting edge extends parallel to the axis of the tube body, the transition surface is circumferentially connected to the cutting edge, the cutting edge is provided with a first opening, and the needle lumen is communicated with the first opening and the lumen of the tube body.

[0008] According to the puncture needle provided by the embodiments of this application, the needle lumen and the lumen of the tube body are smoothly and integrally transitionally connected.

[0009] The puncture needle provided by an embodiment of the present application, the transition surface has a curvature, and the curvature of the transition surface is the same as the curvature of the inner surface of the needle cavity corresponding to the transition surface.

[0010] The puncture needle provided by an embodiment of the present application further includes a needle seat, the needle seat has a channel extending along its own length direction, one end of the channel is connected to the tube body, the channel is communicated with the lumen, and the other end of the channel includes a second opening.

[0011] For the puncture needle provided by an embodiment of the present application, the end of the needle seat where the second opening is located further includes a connecting structure, the connecting structure can be detachably connected to a syringe, and the second opening can be communicated with the syringe.

[0012] For the puncture needle provided by an embodiment of the present application, the needle seat is provided with a direction mark, and the direction mark is used to identify the direction of the cutting edge surface.

[0013] For the puncture needle provided by an embodiment of the present application, the outer wall of the tube body is provided with scales.

[0014] For the puncture needle provided by an embodiment of the present application, in a cross-section formed along the axis of the tube body, the intersection point of the transition surface and the cutting edge surface, and the intersection point of the transition surface and the tube body are connected to form an auxiliary line, and the included angle between the auxiliary line and the axis of the tube body is 9 degrees to 35 degrees.

[0015] For the puncture needle provided by an embodiment of the present application, it further includes a grinding surface, the grinding surface is formed at the connection between the cutting edge surface and the transition surface, the grinding surface straddles the cutting edge surface and the transition surface, and the grinding surface is placed on both sides of the axis of the tube body.

[0016] On the other hand, an embodiment of the present application further provides an intervention device, including a guide wire and the above-mentioned puncture needle, and the guide wire is placed in the lumen.

[0017] The puncture needle and the intervention device of the embodiment of the present application pierce biological tissue through the tip formed by the transition surface and the cutting edge surface. By setting the cutting edge surface parallel to the axis of the tube body, it is possible to avoid the opening of the cutting edge surface from cutting biological tissue, reduce the damage to biological tissue, reduce the puncture resistance, and at the same time reduce the risk of blockage of the lumen by the cut biological tissue, and improve the puncture success rate. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

[0019] Figure 1 The front view of the puncture needle provided by some embodiments of the present application is shown;

[0020] Figure 2 One of the top views of the puncture needle with a needle hub provided by some embodiments of the present application is shown;

[0021] Figure 3 The rear view of the puncture needle with a needle hub provided by some embodiments of the present application is shown;

[0022] Figure 4 The schematic structural diagram of the intervention device provided by some embodiments of the present application is shown;

[0023] Figure 5 The schematic diagram of the tip provided by some embodiments of the present application is shown;

[0024] Figure 6 Another top view of the puncture needle with a needle hub provided by some embodiments of the present application is shown.

[0025] Reference numerals: 100: needle tip; 101: needle lumen; 102: cutting edge surface; 103: transition surface; 104: first opening; 105: polished surface; 110: tip; 200: tube body; 201: lumen of the tube; 202: axis; 300: needle hub; 301: second opening; 302: direction mark; 400: blood vessel; 401: intervention guide wire. Detailed Description of the Embodiments

[0026] The features and exemplary embodiments of various aspects of the present application will be described in detail below. To make the objectives, technical solutions, and advantages of the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present application by showing examples of the present application.

[0027] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0028] With the development of medical technology, the clinical application of interventional diagnosis and treatment is becoming more and more extensive. Puncture operation is one of the important basic operations in interventional diagnosis and treatment. Puncture operations include thoracentesis, abdominal puncture, vascular puncture, lymphatic puncture, and lesion puncture, etc. An interventional access can be established through puncture to drain effusion or perform local interventional treatment; conventional puncture operations are achieved through puncture needles.

[0029] The cutting edge of a traditional puncture needle has a certain angle with the long axis direction of the needle body. During the puncture process, the long axis direction of the needle body forms a certain inclination angle with the skin. The tip of the needle first contacts the skin. As the puncture needle continuously enters the skin, the cutting edge will produce a cutting effect on the skin tissue. The opening of the cutting edge will perform sheet-like cutting on the contacted skin tissue, increasing the damage to the skin and tissue. At the same time, due to the cutting effect of the opening on the cutting edge of the traditional puncture needle, the needle insertion resistance of the puncture needle will be increased. Especially when puncturing blood vessels, it may cause the blood vessels at the puncture point to be compressed, increasing the puncture difficulty and reducing the puncture success rate. As the diameter of the needle body of the traditional puncture needle increases, the size of the opening of the cutting edge also increases, resulting in a more obvious cutting effect and a greater impact on the puncture operation.

[0030] To solve the problems of the prior art, the embodiments of the present application provide a puncture needle and an interventional device. First, the puncture needle provided by the embodiments of the present application will be introduced below.

[0031] Figure 1 The front view of the puncture needle provided by some embodiments of the present application is shown. Figure 2 One of the top views of the puncture needle with a needle holder provided by some embodiments of the present application is shown. Figure 3 The rear view of the puncture needle with a needle holder provided by some embodiments of the present application is shown.

[0032] As Figures 1 to 3As shown in the figure, a puncture needle according to an embodiment of the present application includes: a tube body 200 and a needle head 100. The tube body 200 includes a lumen 201; the needle head 100 has a needle lumen 101 extending along its own length direction. One end of the needle head 100 is connected to the tube body 200, and the other end of the needle head 100 includes a cutting edge surface 102 and a transition surface 103 that are connected to form a tip 110. The cutting edge surface 102 extends parallel to the axis 202 of the tube body 200. The transition surface 103 is circumferentially connected to the cutting edge surface 102. The cutting edge surface 102 is provided with a first opening 104, and the needle lumen 101 is communicated with the first opening 104 and the lumen 201.

[0033] Specifically, in order to reduce the damage to tissues such as skin, muscle, and blood vessels, the cutting edge surface 102 of the needle head 100 is parallel to the axis 202 of the tube body 200, so that the first opening 104 formed on the cutting edge surface 102 reduces the cutting damage to the skin tissue during the puncture process, reduces the size of the wound surface, and reduces the pain and recovery time of the patient. Moreover, the cutting edge surface 102 where the first opening 104 is located will not cut the skin and other tissues during the process of puncturing into the skin and other tissues, and also reduces the resistance during the puncture process, improving the success rate of puncture; since the first opening 104 will not cut the skin and other tissues, therefore, compared with the prior art, the puncture needle of the present application also avoids the cut skin and other tissues from entering the needle lumen 101 and the lumen 201, reducing the risk of blockage of the needle lumen 101 and the lumen 201. It improves the safety and success rate of puncture and facilitates the puncture operation.

[0034] Among them, the needle head 100 and the tube body 200 of the present application can be detachably connected, and the needle head 100 of the present application can be connected to the tube body 200 used in other scenarios to realize the use in different puncture processes. The split structure of the needle head 100 and the tube body 200 is also convenient for processing and production.

[0035] Alternatively, in the embodiment of the present application, the needle lumen 101 and the lumen 201 are smoothly transitionally connected as a whole. That is to say, the needle head 100 and the tube body 200 are of an integral structure, enabling a smooth transition between the needle head 100 and the tube body 200, reducing the risk of liquid leakage at the joint, and avoiding secondary harm to the patient caused by the unevenness at the joint. The materials of the needle head 100 and the tube body 200 include but are not limited to stainless steel and titanium alloy. The length range of the puncture needle is 2 cm to 15 cm, for example, it can be 10 cm.

[0036] In addition, the transition surface 103 is circumferentially connected to the cutting edge surface 102 to form a pointed shape at the second end, that is, the tip 110. During the puncture process of the puncture needle, the tip 110 first contacts the skin and other tissues. The cross-section is small and thin, which is convenient for piercing into the skin and other tissues. The transition surface 103 and the cutting edge surface 102 can be of an integral structure, as in Figure 1In the front view of the puncture needle, the cutting edge surface 102 faces upward, and the transition surface 103 is below the cutting edge surface 102. During the puncture process, the side where the transition surface 103 is located is close to tissues such as the skin, and the side where the cutting edge surface 102 is located is away from tissues such as the skin; during the continuous insertion of the puncture needle, the transition surface 103 first contacts the tissues such as the skin, and then the second opening 301 of the cutting edge surface 102 enters the tissues such as the skin. In other words, there is a blank area of the cutting edge surface 102 between the tip 110 and the second opening 301, and there is also a blank area at the boundary between the second opening 301 and the cutting edge surface 102. The above blank areas can be the wall thickness of the needle cavity 101 of the needle tip 100.

[0037] In addition, in other embodiments of the present application, in order to facilitate the display of the length of the puncture needle entering tissues such as the skin, scales are provided on the outer wall of the tube body 200. Among them, the starting point of the scale, that is, the zero position, is at the tip 110 of the needle tip 100, and the numerical marks of the scale are on the outer wall of the tube body 200. The scale can be etched by methods such as laser.

[0038] It should be explained that, in Figure 1 the front view of the puncture needle, there may be a height difference between the cutting edge surface 102 and the tube body 200, or there may be no height difference. That is, the cutting edge surface 102 and the outer wall of the tube body 200 can be on a straight line.

[0039] Figure 5 The figure shows a schematic diagram of the tip provided by some embodiments of the present application.

[0040] Furthermore, in an embodiment of the present application, as Figure 5 shown, in order to ensure the sharpness of the tip 110 of the puncture needle for more smooth puncture, in the cross-section formed along the axis 202 of the tube body 200, a connecting line is formed between the intersection point of the transition surface 103 and the cutting edge surface 102 and the intersection point of the transition surface 103 and the tube body 200 to form an auxiliary line. The included angle α between the auxiliary line and the axis 202 of the tube body 200 is 9 degrees to 35 degrees. For example, the included angle can be 17 degrees.

[0041] The smaller the included angle, the sharper the tip 110. However, the length of the cutting edge surface 102 will also be longer. The longer cutting edge surface 102 will let air in during the puncture process. Therefore, a suitable angle range can ensure the sharpness of the puncture needle and avoid letting air in during puncture, causing danger.

[0042] Figure 6 The figure shows the second top view of the puncture needle with a needle holder provided by some embodiments of the present application.

[0043] At the same time, in order to reduce the resistance and tissue damage during puncture, as Figure 6As shown, in the embodiment of the present application, a grinding surface 105 is formed at the connection between the cutting edge surface 102 and the transition surface 103. The grinding surface 105 straddles the cutting edge surface 102 and the transition surface 103. The grinding surface 105 is disposed on both sides of the axis 202. The grinding surface 105 can be formed by rotary grinding. The rotation angle δ of the grinding surface 105 ranges from 20 degrees to 30 degrees.

[0044] In some alternative embodiments of the present application, the inner diameter of the lumen 201 ranges from 0.014 inches to 0.035 inches, and the inner diameter of the needle lumen 101 ranges from 0.014 inches to 0.035 inches. To enable the intervention guide wire 401 with a diameter from 0.014 inches to 0.035 inches to pass through. For example, the inner diameter of the lumen 201 can be 0.014 inches or 0.018 inches or 0.035 inches.

[0045] Continue to refer to Figure 1 , Figure 1 The structures of the lumen 201 and the needle lumen 101 are schematically shown by the dashed lines in. In some embodiments of the present application, the transition surface 103 has a curvature, and the curvature of the transition surface 103 is the same as the curvature of the needle lumen 101.

[0046] Specifically, the lumen 201 of the tube body 200 is a straight tube lumen. In order to make the cutting edge surface 102 extend parallel to the axis 202 of the tube body 200, the needle lumen 101 of the needle head 100 has an inflection point relative to the lumen 201. Therefore, there is an included angle between the transition surface 103 of the needle head 100 and the outer surface of the tube body 200. For example, the transition surface 103 of the needle head 100 can be a flat straight surface or a multi-faceted surface or a smooth curved surface, etc. Similarly, the needle lumen 101 can be a straight tube lumen, a multi-faceted lumen or a curved lumen. The transition trend of the needle lumen 101 can be the same as or different from that of the transition surface 103.

[0047] In this embodiment, the transition surface 103 having a curvature is a smooth curved surface, which can also make the puncture needle penetrate into tissues such as the skin better, and avoid increasing the resistance or causing secondary damage to tissues such as the skin when the transition surface 103 contacts the tissues such as the skin. Among them, the needle lumen 101 also adopts a curved lumen with the same curvature as the transition surface 103. When the guide wire passes through the lumen 201 and penetrates into the needle lumen 101, the needle lumen 101 guides the guide wire, so that the guide wire can also smoothly turn from the lumen 201 into the needle lumen 101 and smoothly exit from the first opening 104, improving the penetration efficiency of the intervention guide wire 401.

[0048] Such as Figure 2 and Figure 3As shown, in a specific embodiment of the present application, in order to facilitate the application of the puncture needle to more treatment scenarios, the puncture needle further includes a needle hub 300. The needle hub 300 has a channel extending along its own length direction, and the channel communicates with the lumen. One end of the channel is connected to the tube body 200, the channel communicates with the lumen 201, and the other end of the channel includes a second opening 301. In other words, the second opening 301 communicates with the first opening 104 through the channel, the lumen 201, and the needle lumen 101.

[0049] Specifically, one end of the tube body 200 is connected to the needle tip 100, and the other end of the tube body 200 is connected to the needle hub 300. The needle hub 300 and the tube body 200 can be detachably connected to facilitate the tube body 200 to adapt to different needle hubs 300 and realize the use in different scenarios; or, the needle hub 300 and the tube body 200 can also be fixedly connected to reduce the risk of the needle hub 300 falling off. The needle hub 300 assembles the puncture needle with other medical accessories to facilitate the use in multiple scenarios.

[0050] For example, the outer diameter of the needle hub 300 is greater than the outer diameter of the tube body 200, and the inner diameter of the needle hub 300 is greater than the inner diameter of the tube body 200. That is to say, the radial dimension of the needle hub 300 is greater than the radial dimension of the tube body 200, which is convenient for the assembly of the needle hub 300 with other medical accessories. For example, it is convenient for the penetration of the guide wire. Among them, the material of the needle hub 300 includes but is not limited to polycarbonate and high-density polyethylene.

[0051] Furthermore, in order to facilitate the connection of the needle hub 300 with other medical accessories, the end of the needle hub 300 where the second opening 301 is located further includes a connection structure. The connection structure can be detachably connected to the syringe, and the second opening 301 can communicate with the syringe.

[0052] For example, the connection structure can be the inner wall surface of the fourth end of the needle hub 300 to avoid interference fit with the syringe; or, the connection structure can be a threaded structure provided at the fourth end, and the syringe is threadedly connected to the needle hub 300; or, the connection structure is a buckle for snap connection of the syringe and the needle hub 300.

[0053] Continue to refer to Figure 2 , in another specific embodiment of the present application, in order to quickly find the position of the first opening 104 when the cutting edge 102 is inserted into tissues such as the skin, the needle hub 300 is provided with a direction mark for identifying the direction of the cutting edge 102.

[0054] For example, the direction identifier 302 can be a color bar, which is adhered to the needle hub 300. The plane where the color bar is located is parallel to the cutting edge 102, and the color bar and the cutting edge 102 are on the same side of the axis 202 of the tube body 200, so as to quickly identify the orientation of the first opening 104.

[0055] Figure 4The schematic structural diagram of the interventional device provided by some embodiments of the present application is shown.

[0056] As Figure 4 shown, the present application provides an interventional device, including an interventional guide wire 401 and the puncture needle of the above embodiment, and the interventional guide wire 401 is placed in the lumen 201.

[0057] In clinical applications, before performing the puncture operation on the blood vessel 400, medical staff can perform ultrasonic examination and positioning on the target blood vessel 400, and clarify whether there are stenosis and thrombus in the blood vessel 400. After local disinfection, the puncture site is locally anesthetized with 1% - 2% lidocaine. The needle holder 300 is connected to a 5 ml or 10 ml syringe, and 50 - 100 IU / ml heparin saline is pushed into the puncture needle from the syringe to flush the lumen 201. After flushing the puncture needle, the cutting edge 102 is turned away from the blood vessel 400 for puncture. After the needle tip 100 enters the subcutaneous tissue, the syringe continues to be aspirated while advancing the needle. When the tube body 200 enters the blood vessel 400, blood can be seen by aspirating the syringe. The syringe is removed, and the interventional guide wire 401 is fed into the lumen 201 of the puncture needle.

[0058] As described above, only the specific embodiments of the present application are provided. Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working processes of the above-described systems, modules, and units can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here. It should be understood that the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present application.

Claims

1. A puncture needle, characterized in that: include: a tubular body, the tubular body comprising a tubular lumen; A needle, wherein the needle has a needle cavity extending along its length direction, one end of the needle is connected to the tube body, and the other end of the needle includes a blade surface and a transition surface connected to each other to form a tip, the blade surface extends parallel to the axis of the tube body, the transition surface is connected to the circumferential transition of the blade surface, the blade surface is provided with a first opening, and the needle cavity is connected to the first opening and the tube cavity.

2. The puncture needle according to claim 1, characterized in that: The needle cavity and the tube cavity are smoothly transitioned and connected as one.

3. The puncture needle according to claim 1, characterized in that: The transition surface has a curvature, and the curvature of the transition surface is the same as the curvature of the inner surface of the needle cavity corresponding to the transition surface.

4. The puncture needle according to claim 1, characterized in that: It also includes a needle seat, which has a channel extending along its length direction, one end of the channel is connected to the tube body, the channel is communicated with the tube cavity, and the other end of the channel includes a second opening.

5. The puncture needle according to claim 4, characterized in that: The end of the needle seat where the second opening is located also includes a connecting structure, the connecting structure can be detachably connected to the syringe, and the second opening can be in communication with the syringe.

6. The puncture needle according to claim 4 or 5, characterized in that: The needle seat is provided with a direction mark, and the direction mark is used to identify the direction of the blade surface.

7. The puncture needle according to any one of claims 1 to 5, characterized in that: The outer wall of the tube body is provided with scales.

8. The puncture needle according to any one of claims 1 to 5, characterized in that: In the cross section formed along the axis of the tube body, the intersection of the transition surface and the blade surface and the line connecting the intersection of the transition surface and the tube body form an auxiliary line, and the angle between the auxiliary line and the axis of the tube body is 9 degrees to 35 degrees.

9. The puncture needle according to any one of claims 1 to 5, characterized in that: It also includes a grinding surface, which is formed at the connection between the blade surface and the transition surface, spans the blade surface and the transition surface, and is placed on both sides of the axis of the tube body.

10. An interventional device, characterized in that: The invention comprises an intervention guide wire and the puncture needle according to any one of claims 1 to 9, wherein the intervention guide wire is placed in the lumen.

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