A cardiac ablation needle

Abstract

The present invention discloses a cardiac ablation needle, and the electrode needle body is disposed through the outer sleeve. The distal end of the electrode needle body extends out of the outer sleeve. A cavity is formed in the middle of the electrode needle body, and a discharge hole is formed at the distal end of the electrode needle body. The other end of the discharge hole communicates with the cavity, and hydrogen peroxide is injected inside the cavity. It solves the problem in the prior art that for patients with a relatively large size of ventricular septal hypertrophy, the cardiac ablation needle cannot meet the requirement of accurately adjusting the position of the ablation needle after one ablation and fulfilling the function of multiple ablations. This cardiac ablation needle forms a cavity inside the electrode needle body. The hydrogen peroxide in the cavity plays a role in controlling the temperature of the electrode needle body. Secondly, through the oxidation-reduction reaction of hydrogen peroxide, a small amount of the generated oxygen enters the ventricular septal position, meeting the purpose of ultrasonic imaging, accurately imaging the position of the electrode needle body, facilitating the precise adjustment of the ablation position of the ablation needle, fulfilling multi-position ablation with one puncture, and improving the treatment effect.

Description

Technical Field

[0001] The present invention relates to the technical field of the structural design of medical devices for the treatment of ventricular septal hypertrophy of the heart, and particularly relates to a cardiac ablation needle. Background Art

[0002] Ventricular septal thickening refers to the thickening of the myocardium in the ventricular septum between the left ventricle and the right ventricle. For the hypertrophy of the ventricular septum, it can be seen in physiological conditions, such as athletes and people who often exercise, who often show thickening of the ventricular septum and thickening of the left ventricle. In addition, it can also be seen in pathological conditions, commonly in hypertensive heart disease caused by hypertension, with left ventricular hypertrophy of the ventricular septum. For primary myocardial diseases, such as patients with hypertrophic cardiomyopathy, patients can also show hypertrophy of the ventricular septum.

[0003] In the prior art, there are drug treatment, open-chest surgery treatment, and ablation needle treatment. Among these three methods, especially ablation needle treatment has advantages. It can not only achieve the effect, but also cause less trauma to the patient, which is beneficial to the patient's timely recovery.

[0004] However, in the prior art, in order to ensure the ablation effect, the ablation needle is usually generally limited between 9 mm and 16 mm, and a larger ablation range cannot be guaranteed. The hypertrophic area of the ventricular septum in some patients reaches 40 mm, and the ablation effect cannot be achieved at one time. However, when adjusting the position of the ablation needle, under the action of ultrasonic imaging, the position of the ablation needle cannot be guaranteed. Therefore, only by multiple puncture methods can the purpose of multiple ablation be achieved, causing secondary trauma to the patient.

[0005] Thus, it can be seen that in the prior art, for patients with a larger size of ventricular septal hypertrophy, the cardiac ablation needle cannot meet the requirement of accurately adjusting the position of the ablation needle after one ablation to achieve the effect of multiple ablation. Summary of the Invention

[0006] In view of this, the main purpose of the present invention is to provide a cardiac ablation needle that can conveniently image the position of the working area of the ablation needle, meet one-time puncture, accurately adjust the position of the ablation needle, and meet the adjustment of a larger ventricular septal area.

[0007] To achieve the above object, the technical solution of the present invention is realized as follows:

[0008] A cardiac ablation needle includes: an outer sheath tube and an electrode needle body; the electrode needle body is disposed through the outer sheath tube;

[0009] The distal end of the electrode needle body extends out of the outer sheath tube. A cavity is provided in the middle of the electrode needle body. A discharge hole is provided at the distal end of the electrode needle body, and the other end of the discharge hole communicates with the cavity. Hydrogen peroxide is injected into the cavity.

[0010] In a preferred embodiment, the overall structure of the discharge hole is a bent structure.

[0011] In a preferred embodiment, the discharge hole includes: a plurality of axial holes and a plurality of radial holes. The plurality of axial holes and the plurality of radial holes are connected in sequence to form the discharge hole. The axial holes are parallel to the length direction of the electrode needle body, and the flow direction of the internal medium in the radial holes is towards the proximal end of the electrode needle body.

[0012] In a preferred embodiment, the cavity includes at least two chambers. One chamber injects hydrogen peroxide, and one chamber discharges hydrogen peroxide. The discharge hole extends into the cavity at the junction of the two chambers.

[0013] In a preferred embodiment, a discharge pipe is provided inside the cavity, and a through hole is opened through the discharge pipe at the end of the cavity to communicate the inside of the discharge pipe with the inside of the cavity.

[0014] In a preferred embodiment, the end of the discharge pipe is hermetically connected to the bottom of the cavity. The discharge hole extends into the discharge pipe, and a negative pressure control device is provided at the end of the discharge pipe extending out of the cavity.

[0015] In a preferred embodiment, a ring groove is provided at the end of the cavity. The size of the ring groove is adapted to the size of the end of the discharge pipe. The discharge pipe is hermetically inserted into the ring groove, and the end of the discharge hole is opened at the center of the ring groove.

[0016] In a preferred embodiment, a plurality of through holes are uniformly opened through the outer wall of the discharge pipe.

[0017] In a preferred embodiment, the electrode needle body includes: an ablation part and a conduction part; the conduction part and the ablation part are integrally formed. The end of the conduction part is integrally connected to the ablation part, and the ablation part has a flat blade-like structure.

[0018] In a preferred embodiment, the discharge hole extends out at the distal end of the conduction part, and an extension pipe is connected to the distal end of the conduction part. The lower bottom surface of the extension pipe is fixedly attached to the ablation part, and the length of the extension pipe is less than the length of the ablation part;

[0019] A release hole is opened at the end of the extension pipe.

[0020] In a preferred embodiment, it further includes: an operating handle, and the proximal ends of the outer sleeve and the electrode needle body are respectively connected to the operating handle.

[0021] In a preferred embodiment, a connector is provided at the proximal end of the outer sleeve, a limiting notch is formed at the front end of the operating handle, and the connector is connected in a limiting manner inside the limiting notch;

[0022] In a preferred embodiment, a sliding head is provided at the proximal end of the electrode needle body, a sliding notch is formed at the tail end of the operating handle, the electrode needle body passes through the operating handle and extends into the sliding notch, and the sliding head is slidably connected in a limiting manner inside the sliding notch.

[0023] In a preferred embodiment, it further includes: a sliding control device, the sliding control device is arranged in the middle of the operating handle, one end of the sliding control device extends into the operating handle and is connected to the electrode needle body, so that the sliding control device drives the electrode needle body to expand and contract.

[0024] In a preferred embodiment, the sliding control device includes: a pressing member, a connecting member and a driving cylinder.

[0025] In a preferred embodiment, the driving cylinder is connected to the electrode needle body in a relatively rotatable and limiting manner, the connecting member is fixedly connected to the upper side of the driving cylinder, and the connecting member extends into the pressing member.

[0026] In a preferred embodiment, a through hole is formed inside the operating handle, the electrode needle body is arranged through the through hole, limiting cavities are formed on both sides above the through hole, and a plurality of limiting arc grooves are formed on the upper wall of the limiting cavity.

[0027] In a preferred embodiment, the sliding control device further includes: a resilient member, the resilient member is elastically supported between the pressing member and the connecting member, limiting members are fixedly connected to both sides of the lower end of the pressing member, and the outer wall of the limiting member is connected in a limiting manner with the arc groove structure in a matching manner.

[0028] In a preferred embodiment, the limiting member is a cylindrical structure, and the diameter of the cylindrical structure is the same as the diameter of the arc groove.

[0029] In a preferred embodiment, the pressing member includes: a pressing head and a pressing column, the pressing column is fixedly connected to the lower bottom surface of the pressing head, a sliding hole is formed inside the pressing column, the connecting member extends into the sliding hole, and the end of the connecting member and the bottom of the sliding hole are supported by the resilient member.

[0030] In a preferred embodiment, the distance from the bottom of the pressing column to the surface of the driving cylinder is less than the length when the resilient member is fully extended; the lower side of the limiting member is flush with the lower bottom surface of the pressing column.

[0031] In a preferred embodiment, a sliding groove is formed on the upper side of the operating handle, and the pressing head is arranged inside the sliding groove.

[0032] In a preferred embodiment, a rotation opening is formed on the lower side of the middle part of the driving cylinder, and the upper wall of the rotation opening is flush with the upper side of the electrode needle body.

[0033] In a preferred embodiment, a driving arm is fixedly connected to the position of the electrode needle body at the rotation opening, and the width of the driving arm is the same as the width of the rotation opening.

[0034] In a preferred embodiment, the inner wall of the sliding groove opening is of a polygonal structure, and the outer wall of the sliding head is also of a polygonal structure adapted thereto. The sliding head is fitted and limited to slide into the sliding groove opening.

[0035] In a preferred embodiment, the sliding head includes a left semi-cylinder and a right semi-cylinder. The left semi-cylinder and the right semi-cylinder are oppositely arranged to form a cylindrical sliding head, and the left semi-cylinder and the right semi-cylinder are fixedly connected.

[0036] In a preferred embodiment, a sealing cavity is formed in the middle of the left semi-cylinder and the right semi-cylinder. An extending cavity and an extending-out cavity are respectively formed on the front and rear sides of the sealing cavity, and a liquid inlet cavity and a discharge cavity are respectively formed on the upper and lower sides of the sealing cavity.

[0037] In a preferred embodiment, at the position of the discharge cavity, the discharge pipe extends out of the electrode needle body, extends out of the sliding head along the discharge cavity, and the other end of the discharge pipe is connected to a collector.

[0038] In a preferred embodiment, the electrode needle body further includes a liquid inlet pipe. A liquid inlet hole is formed in the electrode needle body at the liquid inlet cavity. The liquid inlet pipe is arranged through the liquid inlet hole, the liquid inlet pipe extends into the cavity, and the other end of the liquid inlet pipe is connected to a hydrogen peroxide supply device.

[0039] In a preferred embodiment, a sealing shell is arranged inside the sealing cavity. The discharge pipe and the liquid inlet pipe respectively pass through the sealing shell, and a sealing member is arranged inside the sealing shell.

[0040] In a preferred embodiment, the sealing member is wrapped around the connection part of the discharge pipe, the liquid inlet pipe and the electrode needle body. The sealing member is provided with multiple layers, and the sealing shell presses and fixes the sealing member.

[0041] In a preferred embodiment, the hydrogen peroxide supply device includes a temperature control tank and a hydrogen peroxide storage tank. The upper end of the hydrogen peroxide storage tank is provided with a placement opening, and the hydrogen peroxide storage tank extends into the interior of the temperature control tank through the placement opening. A support frame is provided at the bottom of the temperature control tank, and the hydrogen peroxide storage tank is supported on the upper side of the support frame.

[0042] In a preferred embodiment, the upper end of the hydrogen peroxide storage tank is sealed, and the liquid inlet pipe is inserted into the hydrogen peroxide storage tank.

[0043] In a preferred embodiment, the support frame includes a support rod and a top plate. The bottom of the support rod is fixedly connected to the bottom of the temperature control tank, and the upper end of the support rod is fixedly connected to the top plate, and the top plate supports the hydrogen peroxide storage tank.

[0044] In a preferred embodiment, the inner wall of the placement opening is sealed with the outer wall of the hydrogen peroxide storage tank, and the hydrogen peroxide storage tank extends out of the upper end of the temperature control tank;

[0045] In a preferred embodiment, a temperature control medium and a temperature control structure are provided inside the temperature control tank.

[0046] In a preferred embodiment, a pressure groove is pressed on the outer wall of the distal end of the outer sleeve tube, and a developing material is filled inside the pressure groove.

[0047] In a preferred embodiment, the pressure groove has a mesh structure, and the length direction of each pressure groove is inclined towards the axis direction of the outer sleeve tube.

[0048] The cardiac ablation needle of the present invention has the following beneficial effects:

[0049] The cardiac ablation needle includes an outer sleeve tube and an electrode needle body; the electrode needle body is arranged through the outer sleeve tube. The distal end of the electrode needle body extends out of the outer sleeve tube, a cavity is provided in the middle of the electrode needle body, a discharge hole is provided at the distal end of the electrode needle body, and the other end of the discharge hole communicates with the cavity, and hydrogen peroxide is injected into the cavity.

[0050] It solves the problem in the prior art that for patients with a large size of ventricular septal hypertrophy, the cardiac ablation needle cannot meet the requirement of accurately adjusting the position of the ablation needle after one ablation and satisfying multiple ablations.

[0051] The cardiac ablation needle, by providing a cavity inside the electrode needle body, the hydrogen peroxide in the cavity has a temperature control effect on the electrode needle body. Secondly, through the oxidation-reduction reaction of hydrogen peroxide, a small amount of the generated oxygen enters the ventricular septal position, meeting the purpose of ultrasonic imaging, and can accurately image the position of the electrode needle body, facilitating the precise adjustment of the ablation position of the ablation needle, satisfying one puncture and multiple-position ablation, and improving the treatment effect. Brief Description of the Drawings

[0052] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0053] Figure 1 Structural schematic diagram of a cardiac ablation needle according to an embodiment of the present disclosure;

[0054] Figure 2 Is Figure 1 Structural schematic diagram of the ablation part and the end part of the conduction part shown in;

[0055] Figure 3 Is Figure 2 Cross-sectional view of the ablation part and the end part of the conduction part shown in;

[0056] Figure 4 Cross-sectional view at the operating handle of a cardiac ablation needle according to an embodiment of the present disclosure;

[0057] Figure 5 Is Figure 4 Partial enlarged view of the position A shown in;

[0058] Figure 6 Is Figure 4 Structural schematic diagram when the operating handle is cut open to press the pressing column and the sliding head shown in;

[0059] Figure 7 Is Figure 6 Partial enlarged view of the position B shown in;

[0060] Figure 8 Is Figure 6 Partial enlarged view of the position C shown in;

[0061] Figure 9 Structural schematic diagram of the hydrogen peroxide supply device of a cardiac ablation needle according to an embodiment of the present disclosure.

[0062]

Main component symbol description

[0063] 1. Outer sleeve; 11. Connector; 12. Groove;

[0064] 2. Electrode needle body; 21. Ablation part; 22. Conduction part;

[0065] 23. Sliding head; 231. Left semi-cylinder; 232. Right semi-cylinder;

[0066] 24. Liquid inlet pipe;

[0067] 25. Driving arm;

[0068] 3. Cavity;

[0069] 4. Discharge hole; 41. Axial hole; 42. Radial hole; 43. Extension pipe;

[0070] 5. Discharge pipe; 51. Through hole; 52. Negative pressure control device;

[0071] 6. Operating handle;

[0072] 61. Sliding notch; 62. Through hole; 63. Limiting cavity; 64. Arc groove; 65. Slide groove;

[0073] 7. Sliding control device;

[0074] 71. Pressing member; 711. Pressing head; 712. Pressing column;

[0075] 72. Connecting member; 73. Driving cylinder; 731. Rotating port;

[0076] 74. Rebound member; 75. Limiting member;

[0077] 8. Sealing shell; 81. Sealing member;

[0078] 9. Hydrogen peroxide supply device; 91. Temperature control tank; 92. Hydrogen peroxide storage tank;

[0079] 93. Support frame; 931. Support rod; 932. Top plate;

[0080] 10. Energy generating device connecting pipeline. Detailed implementation mode

[0081] The cardiac ablation needle of the present invention will be further described in detail below in conjunction with the accompanying drawings and the embodiments of the present invention.

[0082] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0083] It should be noted that the terms used herein are only for describing specific implementation modes and are not intended to limit the exemplary implementation modes according to the present application. As used herein, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprise" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0084] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0085] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the spatial positional relationship of a device or feature shown in the figure with other devices or features. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is inverted, the device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations are made for the spatial relative descriptions used here.

[0086] As Figures 1-9 shown, the cardiac ablation needle includes an outer catheter 1 that provides a through-channel for the electrode needle body 2 for ablation and an electrode needle body 2 that mainly functions for ablation. The electrode needle body 2 is disposed through the inner cavity of the outer catheter 1.

[0087] The distal end of the electrode needle body 2 extends out of the outer catheter 1 to meet the ablation effect on the hypertrophic part of the cardiac ventricular septum.

[0088] Ultrasound is very sensitive to gas. During ultrasound imaging, if there is a gas-containing part, it can be shown very clearly.

[0089] To ensure the ablation effect and the supporting and assisting effect on the ablation needle, the size of the electrode needle extending out of the outer catheter is generally limited between 9 mm and 16 mm. However, for a large proportion of patients with hypertrophic ventricular septum of the heart, the involved area is relatively large, even completely covering the entire ventricular septum (about 40 mm). To achieve the effect of a single treatment, during the ablation process, it is necessary to adjust the position of the electrode needle to expand the ablation area of a single treatment and avoid secondary harm to the patient. However, due to the relatively long size of the entire ablation needle and the imaging position being set at the end of the outer catheter 1, during the process of adjusting the position of the ablation needle, the position of the ablation site of the ablation needle cannot be ultrasonically displayed, increasing the surgical difficulty.

[0090] To solve the problem that during the ablation process, due to the relatively large ablation area and the size of the ablation site of the ablation needle not being too large, it is necessary to conveniently observe the position of the ablation needle during the process of adjusting the position of the ablation needle.

[0091] A cavity 3 is provided in the middle of the electrode needle body 2, and a discharge hole 4 is provided at the distal end of the electrode needle body 2. The other end of the discharge hole 4 communicates with the cavity 3, and hydrogen peroxide is injected inside the cavity 3.

[0092] The hydrogen peroxide can be a mixture of hydrogen peroxide and water according to different surgical requirements. The temperature of the hydrogen peroxide can also be set to different values according to different requirements.

[0093] By controlling the temperature of the hydrogen peroxide introduced into the cavity, the temperature control effect on the non-ablation part of the electrode needle body 2 is achieved. Secondly, through the discharge hole 4, the oxygen and water generated by the reduction of hydrogen peroxide can be discharged, forming a certain gas space at the ablation site. Since ultrasound is very sensitive to gas, the position of the gas can be observed by ultrasound, and then the position of the ablation site of the ablation needle can be judged to ensure the accuracy of the ablation position.

[0094] Furthermore, to ensure that during the discharge process of the discharge hole 4, the hydrogen peroxide can undergo a complete oxidation-reduction reaction (since during the flow process in the ablation needle cavity, the electrode needle body heats the hydrogen peroxide and a partial oxidation-reduction reaction has occurred), the length of the discharge hole 4 is increased and the flow rate is reduced to ensure a complete oxidation-reduction reaction and meet the requirement that only gas enters the ventricular septum position.

[0095] The overall structure of the discharge hole 4 is in a bent shape to extend the length of the discharge hole 4.

[0096] Furthermore, to reduce the pressure of the discharge hole 4 and extend the length of the discharge hole 4 to ensure a sufficient oxidation-reduction reaction of the hydrogen peroxide. As Figure 2As shown, the discharge hole 4 includes: a plurality of axial holes 41 and a plurality of radial holes 42. The plurality of axial holes 41 and the plurality of radial holes 42 are sequentially connected in a conducting manner (preferably, integrally formed) to form the discharge hole 4. In order to further increase the number of the axial holes 41 and the radial holes 42 and extend the overall length of the discharge hole 4. The axial holes 41 are parallel to the length direction of the electrode needle body 2, and the flow directions of the media inside the radial holes 42 are all towards the proximal end of the electrode needle body 2. So that during the process of the media flowing through the radial holes 42, the flow direction of the media is towards the proximal end of the ablation needle, which can meet the requirement of reducing the buffer flow rate and can also extend the length of the entire discharge hole 4 to ensure the complete redox reaction of hydrogen peroxide.

[0097] In order to facilitate the control of the pressure of hydrogen peroxide and can fully supply hydrogen peroxide to ensure the cooling effect on the non-ablation part of the ablation needle and avoid burning the patient's tissue. The cavity 3 of the ablation needle body 2 at least includes two cavities. One cavity injects hydrogen peroxide, and one cavity discharges hydrogen peroxide. The discharge hole 4 extends into the intersection of the two cavities.

[0098] By connecting pressure control devices to the two cavities respectively, the pressure inside the cavity 3 is ensured, especially in the discharge cavity, a negative pressure state can be selected (during the redox reaction of hydrogen peroxide, the volume becomes larger, avoiding injecting too much gas into the interventricular septum), so as to ensure the amount of gas injected into the interventricular septum and ensure the safety of the operation.

[0099] In order to facilitate the setting of the two cavities, a discharge pipe 5 is arranged inside the cavity 3, and a through hole 51 is opened through the discharge pipe 5 at the end of the cavity 3 to make the inside of the discharge pipe 5 communicate with the inside of the cavity 3. Ensure that the discharge pipe 5 is in a negative pressure state (or a positive pressure state with a small pressure) of a set value to meet the requirement of controlling the amount of gas entering the interventricular septum.

[0100] Of course, in order to facilitate the connection with the cavity 3 and the control of the gas pressure entering the discharge hole 4. The end of the discharge pipe 5 is hermetically connected to the bottom of the cavity 3, the discharge hole 4 extends into the inside of the discharge pipe 5, and a negative pressure control device 52 is arranged at one end of the discharge pipe 5 extending out of the cavity 3.

[0101] In order to facilitate the sealed connection of the discharge pipe 5 and ensure that the hydrogen peroxide flows through the through hole 51 during the flowing process. A ring groove is opened at the end of the cavity 3, the size of the ring groove is adapted to the size of the end of the discharge pipe 5, the discharge pipe 5 is hermetically inserted into the inside of the ring groove, and the end of the discharge hole 4 is opened at the center of the ring groove; the position of the discharge pipe 5 can be restricted by setting the position of the ring groove to ensure that there can be a uniform cavity around the discharge pipe 5 to meet the cooling effect of hydrogen peroxide on the ablation needle body 2 and ensure the safety of using the ablation needle.

[0102] To ensure the conduction between the interior of the cavity and the discharge pipe 5 and limit the flow rate into the discharge pipe 5, a plurality of through holes 51 are evenly formed through the outer wall of the discharge pipe 5. This enables the presence of uniform hydrogen peroxide in the discharge pipe 5, which can uniformly cool the electrode needle body 2.

[0103] When adjusting the position of the electrode needle 2, if it can only be adjusted in the axial direction of the electrode needle body, the ablation area of the ablation needle is severely restricted. Especially for the ventricular septum, which is usually hypertrophied in a circular area. If ablation is only performed at the center, the ablation effect cannot fully achieve the expected result. Therefore, to enable the ablation needle to also adjust its position in the radial direction and increase the ablation space. The electrode needle body 2 includes: an ablation part 21 that mainly functions for ablation and a conduction part 22 that conducts hydrogen peroxide. The conduction part 22 and the ablation part 21 are integrally formed, and the end of the conduction part 22 is integrally formed and connected to the ablation part 21. The ablation part 21 has a flat blade-like structure. The flat direction of this flat blade is perpendicular to the thickness direction of the ventricular septum. When the position needs to be adjusted, the blade can cut the ventricular septum, facilitating the adjustment of different positions and increasing the ablation area per single ablation. Since the adjustment area is relatively narrow and the human body has a certain flexibility, the puncture position of the ablation needle on the skin does not need to be adjusted, which can satisfy the adjustment of the position of the ablation part 21 and improve the ablation effect.

[0104] To better satisfy the determination of the position of the ablation part 21 and ensure that during the process of adjusting the position of the ablation needle, it can be smoothly carried out under ultrasonic observation to ensure the safety of the operation. The discharge hole 4 extends out from the distal end of the conduction part 22, and an extension tube 43 is connected to the distal end of the conduction part 22. The lower bottom surface of the extension tube 43 is fixedly attached to the ablation part 21, and the length of the extension tube 43 is less than the length of the ablation part 21;

[0105] The end of the extension tube 43 is provided with a release hole. This ensures that the gas discharged along the discharge hole 4 is at the middle position of the ablation part 21, enabling more accurate observation of the position of the ablation part 21, improving the accuracy of adjusting the position of the ablation needle during the operation, and enhancing the quality effect.

[0106] To facilitate the holding of the ablation needle, the cardiac ablation needle further includes: an operating handle 6, and the proximal ends of the outer sheath tube 1 and the electrode needle body 2 are respectively connected to the operating handle 6.

[0107] To enable the smooth separation between the electrode needle body 2 and the outer sheath tube 1 and provide a channel for the outer sheath tube 1, such as for sampling with a sampling needle, to avoid secondary injury to the patient. A connection head 11 is provided at the proximal end of the outer sheath tube 1, and a limiting notch is formed at the front end of the operating handle 6. The connection head 11 is connected in a limited manner inside the limiting notch to ensure the separable connection between the electrode needle body 2 and the outer sheath tube 1.

[0108] The inner wall of the limiting notch is a polygonal structure, and the outer wall of the connecting head 11 is a polygonal structure (with a relatively large number of sides, for example, the width of each side is 1 mm or 0.5 mm, adapting to a relatively small rotation angle, which can satisfy the connection with the connecting head 11).

[0109] To facilitate the limiting effect on the electrode needle body 2 and also satisfy the rotation and axial telescopic adjustment of the electrode needle body 2. A sliding head 23 is provided at the proximal end of the electrode needle body 2, and a sliding notch 61 is opened at the tail end of the operating handle 6. The electrode needle body 2 passes through the operating handle 6 and extends into the sliding notch 61, and the sliding head 23 is slidably connected in the sliding notch 61 in a limited way (it can be pulled out and rotated when rotating, and the telescopic adjustment can be made in the axial direction). By adjusting the position of the axis of the electrode needle body 2 and rotating the angle of the electrode needle body 2, it is ensured that the edge direction of the flat edge structure of the ablation part 21 is perpendicular to the thickness direction of the interventricular septum, preparing for the subsequent adjustment of the position of the ablation part 21.

[0110] To facilitate the adjustment and control of the axis of the electrode needle body 2. The cardiac ablation needle further includes: a sliding control device 7 for adjusting the axis of the electrode needle body 2. The sliding control device 7 is arranged in the middle of the operating handle 6. One end of the sliding control device 7 extends into the operating handle 6 and is connected to the electrode needle body 2, so that the sliding control device 7 drives the electrode needle body 2 to expand and contract. It satisfies the telescopic adjustment of the electrode needle body 2 in the axial direction, and after the adjustment is completed, the position of the electrode needle body 2 is limited by the sliding control device 7 to ensure the ablation operation of the electrode needle body 2.

[0111] To facilitate the telescopic control of the electrode needle body 2 by the sliding control device 7 in the axial direction and limit the electrode needle body 2 at a fixed position after adjusting the position. The sliding control device 7 includes: a pressing member 71 for pressing and controlling, a connecting member 72 for connecting and driving, and a driving cylinder 73 for driving the electrode needle body 2.

[0112] The driving cylinder 73 is rotatably and limitably connected to the electrode needle body 2 (a certain rotation angle is sufficient. Since the initial set angle of the electrode needle body 2 is within a predetermined range during the doctor's puncture process, only fine adjustment is required). The connecting member 72 is fixedly connected to the upper side of the driving cylinder 73. The connecting member 72 extends into the pressing member 71. By driving the connecting member 72 through the pressing member 71, the connecting member 72 drives the driving cylinder 73, and the driving cylinder 73 drives the electrode needle body 2 to realize the expansion and contraction of the electrode needle body 2.

[0113] To facilitate the connection with the electrode needle body 2 and also satisfy the control effect on the electrode needle body 2. A through hole 62 is opened inside the operating handle 6, the electrode needle body 2 is arranged through the through hole 62, limiting cavities 63 are opened on both sides above the through hole 62, and a plurality of limiting arc grooves 64 are opened on the upper wall of the limiting cavity 63.

[0114] The sliding control device 7 further includes: a resilient member 74 that supports the resilient action. The resilient member 74 is elastically supported between the pressing member 71 and the connecting member 72. On both sides of the lower end of the pressing member 71, limiting members 75 are fixedly connected. The outer wall of the limiting member 75 is in a structure-adaptive limiting connection with the arc groove 64.

[0115] The resilient member 74 pushes the pressing member 71 to rise, drives the limiting member 75 to rise, and the limiting member 75 enters the inside of the arc groove 64 to play a limiting role and ensure that the axis of the electrode needle body 2 is fixed.

[0116] When it is necessary to adjust the position of the electrode needle body 2, by pressing the pressing member 71, the resilient member 74 is compressed and contracted, and the limiting member 75 follows the pressing member 71 to move down. When the limiting member 75 disengages from the arc groove 64, the electrode needle body 2 can be driven to expand and contract by pushing the pressing member 71.

[0117] In order to facilitate the smooth entry of the limiting member 75 into the inside of the arc groove 64 and also achieve the limiting effect. The limiting member 75 has a cylindrical structure, and the diameter of the cylindrical structure is the same as the diameter of the arc groove 64.

[0118] In order to facilitate the pushing action and achieve the pressing action, two functions. The pressing member 71 includes: a pressing head 711 for frictional pressing; a pressing column 712 that is cooperatively connected with the resilient member 74 and the connecting member 72. The pressing column 712 is fixedly connected to the lower bottom surface of the pressing head 711. A sliding hole is provided inside the pressing column 712, and the connecting member 72 extends into the sliding hole. The end of the connecting member 72 is supported by the resilient member 74 at the bottom of the sliding hole. The resilient member 74 is constrained inside the sliding hole to ensure the stability of the resilient member 74 during the working process. There is no need for a connecting structure at both ends of the resilient member 74 to avoid the defect that it is inconvenient to achieve the connection due to the small size of the resilient member 74.

[0119] In order to prevent the resilient member 74 from being damaged due to excessive pressure during the pressing of the pressing member 71. The distance between the bottom of the pressing column 712 and the surface of the driving cylinder 73 is less than the length of the resilient member 74 when it is fully extended. In order to ensure that when the resilient member 74 is fully extended, the limiting member 75 can enter the inside of the arc groove 64. The lower side of the limiting member 75 is flush with the lower bottom surface of the pressing column 712.

[0120] In order to facilitate the installation of the pressing head 711 and ensure the compactness of the entire structure. A sliding groove 65 is provided on the upper side of the operating handle 6, and the pressing head 711 is arranged inside the sliding groove 65.

[0121] To reserve sufficient rotational space for the electrode needle body, a rotation opening 731 is provided on the lower side of the middle part of the driving cylinder 73, and the upper wall of the rotation opening 731 is flush with the upper side of the electrode needle body 2. A driving arm is fixedly connected to the position of the electrode needle body 2 at the rotation opening 731. The width of the driving arm is the same as the width of the rotation opening, and the driving arm can rotate along the rotation opening.

[0122] The inner wall of the sliding groove opening 61 has a polygonal structure (with a relatively large number of sides, for example, the width of each side is 1 mm or 0.5 mm, adapting to a relatively small rotation angle, which can satisfy the connection with the sliding head). The outer wall of the sliding head 23 is also a polygonal structure, and the sliding head 23 is adaptively and limitedly slid into the sliding groove opening 61.

[0123] To connect the discharge pipeline 5 of the electrode needle body 2 and the liquid inlet, and ensure the formation of a circulating hydrogen peroxide solution inside the electrode needle body 2. The sliding head 23 includes a left semi-cylinder 231 and a right semi-cylinder 232 that can be fixedly connected together. The left semi-cylinder 231 and the right semi-cylinder 232 are oppositely arranged to form a cylindrical sliding head 23, and the left semi-cylinder 231 and the right semi-cylinder 232 are fixedly connected;

[0124] A sealing cavity is provided in the middle of the left semi-cylinder 231 and the right semi-cylinder 232. An insertion cavity (for the insertion of the electrode needle body 2) and an extension cavity (for the extension of the electrode needle body 2. After the motor body 2 extends out of this extension cavity, it is connected to a radio frequency generator or a microwave generator through an energy generating device connecting pipeline) are respectively provided on the front and back sides of the sealing cavity. A liquid inlet cavity (for the entry of the circulating hydrogen peroxide solution) and a discharge cavity (for the discharge of the circulating hydrogen peroxide solution) are respectively provided on the upper and lower sides of the sealing cavity.

[0125] At the position of the discharge cavity, the discharge pipeline 5 extends out of the electrode needle body 2, extends out of the sliding head 23 along the discharge cavity, and the other end of the discharge pipeline 5 is connected to a collector; a negative pressure control device 52 is provided on the discharge pipeline 5 to ensure a negative pressure state (or a positive pressure state with a relatively small pressure) inside the discharge pipeline 5, meeting the pressure control requirements.

[0126] The electrode needle body 2 further includes a liquid inlet pipe 24. The electrode needle body 2 is provided with a liquid inlet hole at the liquid inlet cavity. The liquid inlet pipe 24 is arranged through the liquid inlet hole, the liquid inlet pipe 24 extends into the cavity 3, and the other end of the liquid inlet pipe 24 is connected to a hydrogen peroxide supply device 9. Preferably, a pressure control device (to ensure an appropriate pressure inside the liquid inlet pipe 24) is connected to the middle position of the liquid inlet pipe 24 connecting the hydrogen peroxide supply device.

[0127] To seal the connection, a sealing shell 8 is provided inside the sealing cavity. The discharge pipeline 5 and the liquid inlet pipe 24 respectively pass through the sealing shell 8, and a sealing member 81 is provided inside the sealing shell 8;

[0128] The seal 81 is wrapped around the connection of the discharge pipe 5, the liquid inlet pipe 24 and the electrode needle body 2. The seal 81 is provided with multiple layers, and the seal housing 8 presses and fixes the seal 81.

[0129] For the convenient temperature control of hydrogen peroxide to ensure the supply of hydrogen peroxide that meets the requirements. The hydrogen peroxide supply device 9 includes: a temperature control tank 91 for temperature control of hydrogen peroxide and a hydrogen peroxide storage tank 92 for storing hydrogen peroxide. A placement opening is provided at the upper end of the temperature control tank 91. The hydrogen peroxide storage tank 92 extends into the interior of the temperature control tank 91 through the placement opening. A support frame 93 is provided at the bottom of the temperature control tank 91, and the hydrogen peroxide storage tank is supported on the upper side of the support frame 93.

[0130] The upper end of the hydrogen peroxide storage tank 92 is sealed, and the liquid inlet pipe 24 is inserted into the bottom of the hydrogen peroxide storage tank 92 to allow the liquid inlet pipe 24 to enter the hydrogen peroxide.

[0131] In order to ensure the support effect and at the same time ensure that the hydrogen peroxide storage tank 92 is fully in contact with the medium inside the temperature control tank 91 to ensure the temperature control effect. The support frame 93 includes: a support rod 931 and a top plate 932. The bottom of the support rod 931 is fixedly connected to the bottom of the temperature control tank 91, and the upper end of the support rod 931 is fixedly connected to the top plate 932, and the top plate 932 supports the hydrogen peroxide storage tank 92.

[0132] In order to ensure the compactness of the entire structure, especially to ensure the integration between the hydrogen peroxide storage tank 92 and the temperature control tank 91. The inner wall of the placement opening is sealed with the outer wall of the hydrogen peroxide storage tank 92, and the hydrogen peroxide storage tank 92 extends out of the upper end of the temperature control tank 91.

[0133] Of course, in order to ensure the temperature control function of the temperature control tank 91. A temperature control medium and a temperature control structure are provided inside the temperature control tank 91.

[0134] For the imaging effect at the position of the outer sleeve 1, a pressing groove 12 is pressed on the outer wall of the distal end of the outer sleeve 1, and a imaging material is filled inside the pressing groove 12.

[0135] The pressing groove 12 has a mesh structure, and the length direction of each pressing groove 12 is inclined towards the axis direction of the outer sleeve 1. To avoid skin interference with the patient during the insertion of the outer sleeve into the patient's body.

[0136] The above is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A cardiac ablation needle, characterized in that, Comprising: An outer sleeve (1) and an electrode needle body (2); the electrode needle body (2) is arranged through the outer sleeve (1); The distal end of the electrode needle body (2) extends out of the outer sleeve (1), a cavity (3) is formed in the middle of the electrode needle body (2), a discharge hole (4) is formed at the distal end of the electrode needle body (2), the other end of the discharge hole (4) communicates with the cavity (3), and hydrogen peroxide is injected inside the cavity (3); The overall structure of the discharge hole (4) is a bent structure; The discharge hole (4) includes: a plurality of axial holes (41) and a plurality of radial holes (42), the plurality of axial holes (41) and the plurality of radial holes (42) are sequentially connected to form the discharge hole (4), the axial holes (41) are parallel to the length direction of the electrode needle body (2), and the flow direction of the medium inside the radial holes (42) is towards the proximal end of the electrode needle body (2); The cavity (3) at least includes two cavities, one cavity injects the hydrogen peroxide, one cavity discharges the hydrogen peroxide, and the discharge hole (4) extends into the junction of the two cavities.

2. The cardiac ablation needle according to claim 1, wherein A discharge pipe (5) is arranged inside the cavity (3), and a through hole (51) is formed through the discharge pipe (5) at the end of the cavity (3) to make the inside of the discharge pipe (5) communicate with the inside of the cavity (3); The end of the discharge pipe (5) is hermetically connected to the bottom of the cavity (3), the discharge hole (4) extends into the inside of the discharge pipe (5), and a negative pressure control device (52) is arranged at one end of the discharge pipe (5) extending out of the cavity (3); A ring groove is formed at the end of the cavity (3), the size of the ring groove is adapted to the size of the end of the discharge pipe (5), the discharge pipe (5) is hermetically inserted into the inside of the ring groove, and the end of the discharge hole (4) is formed at the center of the ring groove; A plurality of through holes (51) are uniformly formed through the outer wall of the discharge pipe (5).

3. The cardiac ablation needle according to claim 2, wherein The electrode needle body (2) includes: an ablation part (21) and a conduction part (22); the conduction part (22) and the ablation part (21) are integrally formed, the end of the conduction part (22) is integrally connected to the ablation part (21), and the ablation part (21) is in a flat blade-like structure.

4. The cardiac ablation needle according to claim 3, characterized in that, The discharge hole (4) extends out at the distal end of the conduction part (22), and an extension pipe (43) is connected to the distal end of the conduction part (22), the lower bottom surface of the extension pipe (43) is fixedly attached to the ablation part (21), and the length of the extension pipe (43) is less than the length of the ablation part (21); A release hole is formed at the end of the extension pipe (43); Also comprising: an operating handle (6), the proximal ends of the outer sleeve (1) and the electrode needle body (2) are respectively connected to the operating handle (6); A connection head (11) is arranged at the proximal end of the outer sleeve (1), a limiting notch is formed at the front end of the operating handle (6), and the connection head (11) is connected in the limiting notch in a limiting manner; A sliding head (23) is provided at the proximal end of the electrode needle body (2). A sliding groove opening (61) is formed at the tail end of the operating handle (6). The electrode needle body (2) passes through the operating handle (6) and extends into the sliding groove opening (61). The sliding head (23) is slidably connected in the sliding groove opening (61) in a limited manner. It further includes: a sliding control device (7). The sliding control device (7) is arranged in the middle of the operating handle (6). One end of the sliding control device (7) extends into the operating handle (6) and is connected to the electrode needle body (2), so that the sliding control device (7) drives the electrode needle body (2) to expand and contract.

5. The cardiac ablation needle according to claim 4, wherein, The sliding control device (7) includes: a pressing member (71), a connecting member (72), and a driving cylinder (73). The driving cylinder (73) is rotatably and limitably connected to the electrode needle body (2). The connecting member (72) is fixedly connected to the upper side of the driving cylinder (73). The connecting member (72) extends into the pressing member (71).

6. The cardiac ablation needle according to claim 5, characterized in that, A through hole (62) is formed inside the operating handle (6). The electrode needle body (2) is arranged through the through hole (62). Limiting cavities (63) are formed on both sides above the through hole (62). A plurality of limiting arc grooves (64) are formed on the upper wall of the limiting cavity (63). The sliding control device (7) further includes: a resilient member (74). The resilient member (74) is elastically supported between the pressing member (71) and the connecting member (72). Limiting members (75) are fixedly connected to both sides of the lower end of the pressing member (71). The outer wall of the limiting member (75) is in limiting connection with the arc groove (64) in a structurally adapted manner. The limiting member (75) has a cylindrical structure. The diameter of the cylindrical structure is the same as the diameter of the arc groove (64). The pressing member (71) includes: a pressing head (711) and a pressing column (712). The pressing column (712) is fixedly connected to the lower bottom surface of the pressing head (711). A sliding hole is formed inside the pressing column (712). The connecting member (72) extends into the sliding hole. The end of the connecting member (72) is supported by the resilient member (74) at the bottom of the sliding hole. The distance from the bottom of the pressing column (712) to the surface of the driving cylinder (73) is less than the length when the resilient member (74) is fully extended. The lower side of the limiting member (75) is flush with the lower bottom surface of the pressing column (712). A sliding groove (65) is formed on the upper side of the operating handle (6). The pressing head (711) is arranged inside the sliding groove (65).

7. The cardiac ablation needle according to claim 5, characterized in that, A rotating opening (731) is formed on the lower side of the middle of the driving cylinder (73). The upper wall of the rotating opening (731) is flush with the upper side of the electrode needle body (2). A driving arm (25) is fixedly connected to the position of the electrode needle body (2) at the rotating opening (731). The width of the driving arm (25) is the same as the width of the rotating opening (731). The inner wall of the sliding slot (61) is of a polygonal structure, and the outer wall of the sliding head (23) is also of a polygonal structure, and the sliding head (23) is adapted to be limited and slide into the inside of the sliding slot (61); The sliding head (23) includes a left semi-cylinder (231) and a right semi-cylinder (232). The left semi-cylinder and the right semi-cylinder are arranged opposite to each other to form a cylindrical sliding head (23), and the left semi-cylinder (231) and the right semi-cylinder (232) are fixedly connected; A sealing cavity is provided in the middle of the left semi-cylinder (231) and the right semi-cylinder (232). An extending cavity and an extending-out cavity are respectively provided on the front and rear sides of the sealing cavity, and a liquid inlet cavity and a discharge cavity are respectively provided on the upper and lower sides of the sealing cavity; At the position of the discharge cavity, the discharge pipe (5) extends out of the electrode needle body (2), extends out of the sliding head (23) along the discharge cavity, and the other end of the discharge pipe (5) is connected to a collector; The electrode needle body (2) further includes a liquid inlet pipe (24). The electrode needle body (2) is provided with a liquid inlet hole at the liquid inlet cavity. The liquid inlet pipe (24) is arranged through the liquid inlet hole. The liquid inlet pipe (24) extends into the cavity (3) internally, and the other end of the liquid inlet pipe (24) is connected to a hydrogen peroxide supply device; A sealing shell (8) is arranged inside the sealing cavity. The discharge pipe (5) and the liquid inlet pipe (24) respectively pass through the sealing shell (8), and a sealing member (81) is arranged inside the sealing shell (8); The sealing member (81) wraps around the connection positions of the discharge pipe (5), the liquid inlet pipe (24) and the electrode needle body (2). The sealing member (81) is provided with multiple layers, and the sealing shell (8) presses and fixes the sealing member (81); The hydrogen peroxide supply device (9) includes a temperature control tank (91) and a hydrogen peroxide storage tank (92). The upper end of the hydrogen peroxide storage tank (92) is provided with a placement opening. The hydrogen peroxide storage tank (92) extends into the temperature control tank (91) through the placement opening. A support frame (93) is arranged at the bottom of the temperature control tank (91), and the hydrogen peroxide storage tank is supported on the upper side of the support frame; The upper end of the hydrogen peroxide storage tank (92) is sealed, and the liquid inlet pipe (24) is inserted into the hydrogen peroxide storage tank (92); The support frame (93) includes a support rod (931) and a top plate (932). The bottom of the support rod (931) is fixedly connected to the bottom of the temperature control tank (91), and the upper end of the support rod (931) is fixedly connected to the top plate (932), and the top plate (932) supports the hydrogen peroxide storage tank (92); The inner wall of the placement opening is sealed with the outer wall of the hydrogen peroxide storage tank (92), and the hydrogen peroxide storage tank (92) extends out of the upper end of the temperature control tank (91); A temperature control medium and a temperature control structure are arranged inside the temperature control tank (91).

8. The cardiac ablation needle according to any one of claims 1-2, characterized in that, A pressing groove (12) is pressed on the outer wall at the distal end of the outer sleeve tube (1), and a developing material is filled inside the pressing groove (12); The pressing groove (12) is of a mesh structure, and the length direction of each pressing groove (12) is inclined towards the axis direction of the outer sleeve tube (1).

Images