CN220512904U - Heart ablation needle - Google Patents

Abstract

The utility model discloses a heart ablation needle, wherein an electrode needle body passes through an 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, a discharge hole is formed in the distal end of the electrode needle body, the other end of the discharge hole is communicated with the cavity, and hydrogen peroxide is injected into the cavity. The cardiac ablation needle solves the problems that in the prior art, for patients with a large ventricular septum, the cardiac ablation needle cannot accurately adjust the position of the ablation needle after one ablation is finished, and the effect of multiple ablations is met. This heart melts needle through set up the cavity in electrode needle body inside, and hydrogen peroxide in the cavity is to electrode needle body temperature control effect, and secondly hydrogen peroxide oxidation-reduction reaction, and the oxygen that produces is a small amount to get into room interval position, has satisfied the purpose of ultrasonic development, the position of developing electrode needle body that can be accurate, and the convenient accurate ablation position of adjusting melts the needle satisfies puncture once, and the multiposition melts, improves the treatment.

Description

Heart ablation needle

Technical Field

The utility model relates to the technical field of structural design of medical equipment used for treating cardiac ventricular hypertrophy, in particular to a cardiac ablation needle.

Background

Inter-ventricular septum thickening refers to the inter-ventricular septum between the left and right compartments, where there is myocardial hypertrophy. For thickening of the compartment, which can be seen in physiological situations, such as athletes and people who exercise frequently, thickening of the compartment, thickening of the left compartment, often occurs. In addition, it is also seen in pathological conditions that hypertensive heart disease is usually caused by hypertension, and left ventricular hypertrophy occurs at the inter-ventricular septum. For primary myocardial diseases, such as hypertrophic cardiomyopathy, patients may also develop ventricular septum hypertrophy.

In the prior art, the three methods, namely the drug treatment, the open chest operation treatment and the ablation needle treatment, have the advantages of being particularly good in the ablation needle treatment, not only achieving the effect, but also being small in wound on a patient and being beneficial to timely recovery of the patient.

However, in the prior art, in order to ensure the ablation, the ablation needle is generally limited to 9mm-16mm, and a larger range of ablation cannot be ensured. The ventricular septum thickening area of partial patients reaches 40mm, once can not meet the ablation effect, but the position of an ablation needle can not be guaranteed under the ultrasonic development effect by adjusting the position of the ablation needle, so that the aim of repeated ablation can be fulfilled only through a repeated puncturing mode, and secondary wounds of the patients are caused.

Therefore, in the prior art, for patients with larger ventricular septum size, the cardiac ablation needle cannot meet the requirement of accurately adjusting the position of the ablation needle after one ablation is finished, and the effect of multiple ablations is met.

Disclosure of Invention

Therefore, the main purpose of the utility model is to provide a cardiac ablation needle which can conveniently develop the position of the working area of the ablation needle, meet the requirement of one puncture, accurately adjust the position of the ablation needle and meet the requirement of adjusting a larger inter-ventricular zone.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

a cardiac ablation needle comprising: an outer sleeve and an electrode needle body; the electrode needle body passes through the outer sleeve;

the electrode needle comprises an outer sleeve, an electrode needle body, a cavity, a discharge hole, a hydrogen peroxide and a hydrogen peroxide injection device, wherein the distal end of the electrode needle body extends out of the outer sleeve, the middle of the electrode needle body is provided with the cavity, the distal end of the electrode needle body is provided with the discharge hole, the other end of the discharge hole is communicated with the cavity, and the hydrogen peroxide is injected into the cavity.

In a preferred embodiment, the overall structure of the outlet opening is a bent structure.

In a preferred embodiment, the discharge hole includes: the electrode needle comprises an electrode needle body, a plurality of axial holes and a plurality of radial holes, wherein the axial holes and the radial holes are sequentially connected to form the discharge hole, the axial holes are parallel to the length direction of the electrode needle body, and the flow direction of media inside the radial holes is toward the proximal end of the electrode needle body.

In a preferred embodiment, the cavity comprises at least two cavities, wherein one cavity is used for injecting the hydrogen peroxide, one cavity is used for discharging the hydrogen peroxide, and the junction of the two cavities extends into the discharge hole.

In a preferred embodiment, a discharge pipe is provided in the cavity, and a through hole is provided at the cavity end portion so as to penetrate the discharge pipe, thereby allowing the discharge pipe to communicate with the cavity.

In a preferred embodiment, the end of the discharge pipe is connected with the bottom of the cavity in a sealing manner, the discharge hole extends into the discharge pipe, and a negative pressure control device is arranged at the end of the discharge pipe extending out of the cavity.

In a preferred embodiment, a ring groove is formed in the end portion of the cavity, the size of the ring groove is matched with that of the end portion of the discharge pipeline, the discharge pipeline is inserted into the ring groove in a sealing mode, and the end portion of the discharge hole is formed in the center of the ring groove.

In a preferred embodiment, a plurality of through holes are uniformly formed through the outer wall of the discharge pipe.

In a preferred embodiment, the electrode needle body includes: an ablation portion and a conduction portion; the conducting part and the ablation part are integrally formed, the end part of the conducting part is integrally formed and connected with the ablation part, and the ablation part is of a flat cutting edge-shaped structure.

In a preferred embodiment, the discharge hole extends out of the distal end of the conducting part, and is connected with an extension tube at the distal end of the conducting part, the lower bottom surface of the extension tube is attached and fixed with the ablation part, and the length of the extension tube is smaller than that of the ablation part;

the end of the extension tube is provided with a release hole.

In a preferred embodiment, further comprising: and the proximal ends of the outer sleeve and the electrode needle body are respectively connected with the operating handle.

In a preferred embodiment, the proximal end of the outer sleeve is provided with a connector, the front end of the operating handle is provided with a limit notch, and the connector is in limit connection with the inside of the limit notch;

in a preferred embodiment, the proximal end of the electrode needle body is provided with a sliding head, the tail end of the operating handle is provided with a sliding notch, the electrode needle body penetrates through the operating handle to extend into the sliding notch, and the sliding head is in limited sliding connection inside the sliding notch.

In a preferred embodiment, further comprising: the sliding control device is arranged in the middle of the operating handle, and one end of the sliding control device stretches into the operating handle and is connected with the electrode needle body, so that the sliding control device drives the electrode needle body to stretch out and draw back.

In a preferred embodiment, the slide control device includes: the device comprises a pressing piece, a connecting piece and a driving cylinder.

In a preferred embodiment, the driving cylinder and the electrode needle body are in relative rotation limiting connection, the upper side of the driving cylinder is fixedly connected with the connecting piece, and the connecting piece stretches into the pressing piece.

In a preferred embodiment, a through hole is formed in the operating handle, the electrode needle body penetrates through the through hole, limiting cavities are formed in two sides above the through hole, and a plurality of limiting circular arc grooves are formed in the upper wall of each limiting cavity.

In a preferred embodiment, the slide control device further includes: the elastic support is provided with the elastic support between the pressing piece and the connecting piece, two sides of the lower end part of the pressing piece are fixedly connected with limiting pieces, and the outer wall of each limiting piece is in adaptive limiting connection with the circular arc groove.

In a preferred embodiment, the limiting member has a cylindrical structure, and the diameter of the cylindrical structure is the same as the diameter of the circular arc groove.

In a preferred embodiment, the pressing member includes: the device comprises a pressing head and a pressing column, wherein the pressing column is fixedly connected to the lower bottom surface of the pressing head, a sliding hole is formed in the pressing column, a connecting piece stretches into the sliding hole, and the end part of the connecting piece and the bottom of the sliding hole are supported through a rebound piece.

In a preferred embodiment, the distance from the bottom of the pressing column to the surface of the driving cylinder is smaller than the length of the rebound member when the rebound member is fully extended; the lower side of the limiting piece is flush with the lower bottom surface of the pressing column.

In a preferred embodiment, a chute is formed on the upper side of the operating handle, and the pressing head is disposed inside the chute.

In a preferred embodiment, a rotary opening is formed in the lower side of the middle of the driving cylinder, and the upper wall of the rotary opening is flush with the upper side of the electrode needle body.

In a preferred embodiment, the electrode needle body is fixedly connected with a driving arm at the position of the rotating opening, and the width of the driving arm is the same as that of the rotating opening.

In a preferred embodiment, the inner wall of the sliding notch is of a polygonal structure, the outer wall of the adaptive sliding head is also of a polygonal structure, and the adaptive sliding head is limited to slide into the sliding notch;

in a preferred embodiment, the slider comprises: the left semicircle body and the right semicircle body are oppositely arranged to form a cylindrical sliding head, and the left semicircle body and the right semicircle body are fixedly connected.

In a preferred embodiment, the middle parts of the left semicircle body and the right semicircle body are provided with sealing cavities, the front side and the rear side of each sealing cavity are respectively provided with an extending cavity and an extending cavity, and the upper side and the lower side of each sealing cavity are respectively provided with a liquid inlet cavity and a discharging cavity.

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

In a preferred embodiment, the electrode needle body further comprises: the electrode needle body is provided with a liquid inlet hole at the liquid inlet cavity, the liquid inlet pipe penetrates through the liquid inlet hole, the liquid inlet pipe stretches into the cavity, and the other end of the liquid inlet pipe is connected with a hydrogen peroxide supply device.

In a preferred embodiment, a sealing housing is arranged inside the sealing chamber, through which sealing housing the discharge line and the feed line each pass, and a sealing element is arranged inside the sealing housing.

In a preferred embodiment, the sealing element wraps the junction of the discharge pipeline, the liquid inlet pipe and the electrode needle body, the sealing element is provided with a plurality of layers, and the sealing shell compresses and fixes the sealing element.

In a preferred embodiment, the hydrogen peroxide supply device includes: the hydrogen peroxide storage tank is provided with a placing opening, the hydrogen peroxide storage tank stretches into the temperature control tank through the placing opening, a supporting frame is arranged at the bottom of the temperature control tank, and the hydrogen peroxide storage tank is supported on the upper side of the supporting frame.

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.

In a preferred embodiment, the support frame comprises: the bottom of the supporting rod is fixedly connected with the bottom of the temperature control tank, the upper end of the supporting rod is fixedly connected with the top plate, and the top plate supports the hydrogen peroxide storage tank.

In a preferred embodiment, the inner wall of the placing port 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;

in a preferred embodiment, the temperature-controlled tank is internally provided with a temperature-controlled medium and a temperature-controlled structure.

In a preferred embodiment, the outer wall of the distal end of the outer sleeve is pressed with a pressing groove, and the inside of the pressing groove is filled with a developing material.

In a preferred embodiment, the pressing grooves are in a net structure, and the length direction of each pressing groove is inclined to the axial direction of the outer sleeve.

The heart ablation needle has the following beneficial effects:

the cardiac ablation needle includes: an outer sleeve and an electrode needle body; the electrode needle body passes 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, a discharge hole is formed in the distal end of the electrode needle body, the other end of the discharge hole is communicated with the cavity, and hydrogen peroxide is injected into the cavity.

The cardiac ablation needle solves the problems that in the prior art, for patients with a large ventricular septum, the cardiac ablation needle cannot accurately adjust the position of the ablation needle after one ablation is finished, and the effect of multiple ablations is met.

This heart melts needle through set up the cavity in electrode needle body inside, and hydrogen peroxide in the cavity is to electrode needle body temperature control effect, and secondly hydrogen peroxide oxidation-reduction reaction, and the oxygen that produces is a small amount to get into room interval position, has satisfied the purpose of ultrasonic development, the position of developing electrode needle body that can be accurate, and the convenient accurate ablation position of adjusting melts the needle satisfies puncture once, and the multiposition melts, improves the treatment.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic structural view of a cardiac ablation needle according to one embodiment of the present disclosure;

FIG. 2 is a schematic view of the structure of the ablation portion and the end of the conduction portion shown in FIG. 1;

FIG. 3 is a cross-sectional view of the ablation portion and the end of the lead-through portion shown in FIG. 2;

FIG. 4 is a cross-sectional view at the handle of a cardiac ablation needle in accordance with one embodiment of the present disclosure;

FIG. 5 is an enlarged view of a portion at A shown in FIG. 4;

FIG. 6 is a schematic view of the lever of FIG. 4 with the push post and slider broken away;

fig. 7 is a partial enlarged view at B shown in fig. 6;

FIG. 8 is an enlarged view of a portion at C shown in FIG. 6;

fig. 9 is a schematic structural view of a hydrogen peroxide supply device of a cardiac ablation needle according to an embodiment of the present disclosure.

[ Main reference numerals Specification ]

1. An outer sleeve; 11. a connector; 12. pressing a groove;

2. an electrode needle body; 21. an ablation section; 22. a conduction part;

23. a slider; 231. a left semicircle; 232. a right semicircle;

24. a liquid inlet pipe;

25. a driving arm;

3. a cavity;

4. a discharge hole; 41. an axial hole; 42. a radial hole; 43. an extension tube;

5. a discharge pipe; 51. a via hole; 52. negative pressure control means;

6. an operation handle;

61. a sliding notch; 62. a through hole; 63. a spacing cavity; 64. an arc groove; 65. a chute;

7. a slide control device;

71. a pressing member; 711. Pressing the head; 712. Pressing the column;

72. a connecting piece; 73. A drive cylinder; 731. A rotating port;

74. a rebound member; 75. A limiting piece;

8. a sealed housing; 81. A seal;

9. a hydrogen peroxide supply device; 91. A temperature control tank; 92. A hydrogen peroxide storage tank;

93. a support frame; 931. a support rod; 932. a top plate;

10. the energy generating device is connected with the pipeline.

Detailed Description

The cardiac ablation needle of the present utility model will be described in further detail with reference to the accompanying drawings.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be capable of being practiced otherwise than as specifically illustrated and described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1-9, the cardiac ablation needle includes: an outer sleeve 1 passing through the channel and an electrode needle body 2 mainly playing an ablation role are provided for the electrode needle body 2 for the ablation role. The electrode needle body 2 passes through the inner cavity of the outer sleeve 1.

The distal end of the electrode needle body 2 extends out of the outer sleeve 1, so as to realize the ablation effect on the cardiac septum hypertrophy.

Ultrasound is very sensitive to gases and can be shown very clearly during ultrasound development if a gaseous site is encountered.

In order to ensure the ablation effect and the supporting assistance to the ablation needle, the size of the electrode needle extending out of the outer sleeve is generally limited to 9-16 mm, however, a large part of patients with cardiac ventricular septum is involved, the area is relatively large, and the whole ventricular septum (about 40 mm) is even completely covered. In order to meet the effect of primary treatment, the position of the electrode needle needs to be adjusted in the ablation process, the ablation area of the primary treatment is enlarged, and secondary damage to a patient is avoided. However, since the whole ablation needle is longer in size and the development position is set at the end of the outer sleeve 1, the position of the ablation part of the ablation needle cannot be displayed ultrasonically in the process of adjusting the position of the ablation needle, and the operation difficulty is increased.

In order to solve the problem that the size of the ablation part of the ablation needle is not easy to be oversized due to the fact that the ablation part is bigger in the ablation process, the position of the ablation needle needs to be conveniently observed in the process of adjusting the position of the ablation needle.

The middle part of the electrode needle body 2 is provided with a cavity 3, the far end of the electrode needle body 2 is provided with a discharge hole 4, the other end of the discharge hole 4 is communicated with the cavity 3, and hydrogen peroxide is injected into the cavity 3.

The hydrogen peroxide can be a mixture of hydrogen peroxide and water according to different operation requirements. The temperature of the hydrogen peroxide can also be set to different problems according to different requirements.

Through the temperature of oxydol in the through-breast cavity, realize the non-ablation position control effect to electrode needle body 2, secondly can discharge oxygen and the water that hydrogen peroxide reduction produced through discharge port 4, form certain gas space at the ablation position, because supersound is very sensitive to gas, can observe the position of gas through supersound, and then judge the position of ablation needle ablation position, guarantee the accuracy of ablation position.

Further, in order to ensure that the hydrogen peroxide can thoroughly undergo oxidation-reduction reaction in the discharging process of the discharging hole 4 (because the ablation needle body heats the hydrogen peroxide in the circulating process in the cavity of the ablation needle and partial oxidation-reduction reaction already occurs), the length of the discharging hole 4 is increased, the flow speed is reduced, the thorough oxidation-reduction reaction is ensured, and the condition that only gas enters the room interval position is satisfied.

The overall structure of the discharge hole 4 is a bent structure, and the length of the discharge hole 4 is prolonged.

Further, in order to reduce the pressure of the discharge hole 4, the length of the discharge hole 4 is extended, and the sufficient oxidation-reduction reaction of the hydrogen peroxide is ensured. As shown in fig. 2, the discharge hole 4 includes: the plurality of axial holes 41 and the plurality of radial holes 42 are connected (preferably, integrally formed) in turn by conduction to the plurality of axial holes 41 and the plurality of radial holes 42 to form the discharge hole 4. In order to further increase the number of the axial holes 41 and the radial holes 42 provided, the overall length of the discharge hole 4 is extended. The axial hole 41 is parallel to the longitudinal direction of the electrode needle body 2, and the medium inside the radial hole 42 flows toward the proximal end of the electrode needle body 2. So that the flow direction of the medium is towards the proximal end of the ablation needle during the medium flowing process of the radial holes 42, thereby reducing the buffer flow rate, prolonging the length of the whole discharge hole 4 and ensuring the thorough oxidation-reduction reaction of the hydrogen peroxide.

In order to conveniently control the pressure of the hydrogen peroxide, the hydrogen peroxide can be fully supplied, the cooling effect on the non-ablation part of the ablation needle is ensured, and the burn of the tissue of a patient is avoided. The cavity 3 of the ablation needle body 2 at least comprises two cavities, wherein one cavity is injected with hydrogen peroxide, the other cavity is discharged with hydrogen peroxide, and the junction of the two cavities stretches into the discharge hole 4.

The pressure control device is respectively connected with the two cavities, so that the pressure in the cavity 3 is ensured, and particularly, the negative pressure state (hydrogen peroxide is increased in the oxidation-reduction reaction process and the excessive gas in the room interval is avoided) can be selected when the cavity is discharged, thereby ensuring the quantity of the injected gas in the room interval and ensuring the safety of the operation.

In order to facilitate the arrangement of the two cavities, a discharge pipeline 5 is arranged in the cavity 3, and a through hole 51 is formed in the end part of the cavity 3 penetrating through the discharge pipeline 5, so that the inside of the discharge pipeline 5 is communicated with the inside of the cavity 3. The discharge pipe 5 is ensured to be in a negative pressure state (or a positive pressure state with smaller pressure) with a set value, so that the control of the amount of the gas entering the room space is satisfied.

Of course, for the sake of convenience of connection with the cavity 3, and control of the gas pressure entering the discharge orifice 4. The end of the discharge pipe 5 is connected with the bottom of the cavity 3 in a sealing way, the discharge hole 4 extends into 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.

In order to facilitate the sealing connection of the discharge pipeline 5, the hydrogen peroxide flows through the through holes 51 in the circulation process. The end part of the cavity 3 is provided with a ring groove, the size of the ring groove is matched with the size of the end part of the discharge pipeline 5, the discharge pipeline 5 is inserted into the ring groove in a sealing way, and the end part of the discharge hole 4 is arranged in the center of the ring groove; through the setting of annular position, the position of restriction discharge pipe 5 guarantees that discharge pipe 5 can have even cavity around, satisfies the cooling effect of hydrogen peroxide to ablation needle body 2, guarantees the security that the ablation needle used.

In order to ensure conduction between the interior of the cavity and the discharge pipe 5, the flow rate of the fluid flowing into the discharge pipe 5 can be limited, and a plurality of through holes 51 are uniformly formed through the outer wall of the discharge pipe 5. The discharge pipeline 5 is provided with uniform hydrogen peroxide, so that the electrode needle body 2 can be uniformly cooled.

During the adjustment of the position of the electrode needle 2, the ablation area of the ablation needle is severely limited if only the adjustment in the axial direction of the electrode needle body is possible. In particular, the cell space is usually a rounded area, and if ablation is performed only centrally, the ablation effect is not completely as desired. Therefore, in order to meet the requirement of the ablation needle in the radial direction, the adjustment position can be met, and the ablation space is increased. The electrode needle body 2 includes: an ablation part 21 mainly playing an ablation role and a conduction part 22 conducting hydrogen peroxide. The conducting part 22 and the ablating part 21 are integrally formed, the end part of the conducting part 22 is integrally formed and connected with the ablating part 21, and the ablating part 21 is of a flat cutting edge-shaped structure. The flat direction of the flat cutting edge is perpendicular to the thickness direction of the compartment space, when the position needs to be adjusted, the cutting edge can cut the compartment space, different positions can be conveniently adjusted, and the single ablation area is improved. Because the adjusting area is narrower, the human body has certain flexibility, so the position of the ablation needle penetrating the skin is not required to be adjusted, the adjustment of the position of the ablation part 21 can be satisfied, and the ablation effect is improved.

In order to better meet the requirement of determining the position of the ablation part 21, the smooth operation under ultrasonic observation can be ensured in the process of adjusting the position of the ablation needle, and the safety of the operation is ensured. The discharge hole 4 extends out of the distal end of the conducting part 22, and is connected with an extension tube 43 at the distal end of the conducting part 22, the lower bottom surface of the extension tube 43 is adhered and fixed with the ablation part 21, and the length of the extension tube 43 is smaller than that of the ablation part 21;

the end of the extension tube 43 is provided with a release hole. Thereby ensuring that the gas exhausted along the exhaust hole 4 is positioned in the middle of the ablation part 21, more accurately observing the position of the ablation part 21, improving the position of the ablation needle accurately adjusted in the process of income and improving the quality effect.

To facilitate handling of the ablation needle, the cardiac ablation needle further comprises: the proximal ends of the operating handle 6, the outer sleeve 1 and the electrode needle body 2 are respectively connected with the operating handle 6.

In order to meet the requirements of smooth separation between the electrode needle body 2 and the outer sleeve 1, the outer sleeve 1 can provide a channel for sampling, such as a sampling needle, so as to avoid secondary injury to a patient. The proximal end of the outer sleeve 1 is provided with a connector 11, the front end of the operating handle 6 is provided with a limit notch, the connector 11 is in limit connection with the inside of the limit notch, and separable connection between the electrode needle body 2 and the outer sleeve 1 is ensured.

The inner wall of the limit notch is of a polygonal structure, the outer wall of the connector 11 is of a polygonal structure (the number of sides is more, for example, the width of each change is 1mm or 0.5mm, and the connector can meet the connection with the connector 11 by adapting to the smaller rotation angle).

In order to facilitate the limiting effect on the electrode needle body 2, the rotation and axial telescopic adjustment of the electrode needle body 2 can be satisfied. The proximal end of the electrode needle body 2 is provided with a sliding head 23, the tail end of the operating handle 6 is provided with a sliding notch 61, the electrode needle body 2 penetrates through the operating handle 6 and stretches into the sliding notch 61, the sliding head 23 can be limited (can be pulled out and rotated in rotation and can be adjusted to stretch out and draw back in the axial direction) and is connected inside the sliding notch 61. By adjusting the position of the axis of the electrode needle body 2 and rotating the angle of the electrode needle body 2, the cutting edge direction of the flat cutting edge-shaped structure of the ablation part 21 is ensured to be perpendicular to the thickness direction of the room interval, and preparation is made for the position adjustment of the ablation part 21 in the later stage.

For facilitating the adjustment and control of the axis of the electrode needle body 2. The cardiac ablation needle further comprises: and 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, and one end of the sliding control device 7 extends into the operating handle 6 and is connected with the electrode needle body 2, so that the sliding control device 7 drives the electrode needle body 2 to stretch and retract. The telescopic adjustment of the electrode needle body 2 in the axial direction is satisfied, and after the adjustment is finished, the position of the electrode needle body 2 is limited by the sliding control device 7, so that the ablation operation of the electrode needle body 2 is ensured.

In order to facilitate the telescopic control of the sliding control device 7 on the electrode needle body 2 in the axial direction, and the adjustment of the position, the electrode needle body 2 can be limited to be at a fixed position. The slide control device 7 includes: a pressing piece 71 for pressing the manipulation, a connecting piece 72 for connecting the driving action, and a driving cylinder 73 for driving the electrode needle body 2.

The driving barrel 73 and the electrode needle body 2 can be in relative rotation limiting connection (a certain rotation angle is enough, and the electrode needle body 2 is initially set in a preset range in the process of puncture by a doctor, so that fine adjustment is only needed), the connecting piece 72 is fixedly connected to the upper side of the driving barrel 73, the connecting piece 72 stretches into the pressing piece 71, the connecting piece 72 is driven by the pressing piece 71, the driving barrel 73 is driven by the connecting piece 72, the electrode needle body 2 is driven by the driving barrel 73, and the electrode needle body 2 stretches out and stretches back.

In order to facilitate the connection with the electrode needle body 2, the control function of the electrode needle body 2 can be satisfied. The operation handle 6 is internally provided with a through hole 62, the electrode needle body 2 passes through the through hole 62, two sides above the through hole 62 are provided with limiting cavities 63, and the upper wall of each limiting cavity 63 is provided with a plurality of limiting circular arc grooves 64.

The slide control device 7 further includes: the rebound piece 74 supporting the rebound effect elastically supports the rebound piece 74 between the pressing piece 71 and the connecting piece 72, the two sides of the lower end part of the pressing piece 71 are fixedly connected with the limiting pieces 75, and the outer wall of the limiting piece 75 is in structure fit limiting connection with the circular arc groove 64.

The rebound piece 74 pushes the pressing piece 71 to rise, the limiting piece 75 is driven to rise, the limiting piece 75 enters the arc groove 64, and the limiting effect is achieved, so that the axis of the electrode needle body 2 is ensured to be fixed.

When the position of the electrode needle body 2 needs to be adjusted, the compression rebound piece 74 contracts by pressing the pressing piece 71, the limiting piece 75 moves downwards along with the pressing piece 71, and when the limiting piece 75 is separated from the circular arc groove 65, the electrode needle body 2 can be driven to stretch and retract by pushing the pressing piece 71.

In order to facilitate the smooth entry of the limiting member 75 into the circular arc groove 64, a limiting effect may be achieved. The stopper 75 has a cylindrical structure, and the diameter of the cylindrical structure is the same as the diameter of the circular arc groove 64.

In order to facilitate the pushing action and to realize the pressing action, two functions are provided. The pressing piece 71 includes: a pressing head 711 that rubs a pressing action; a pressing post 712 cooperatively connected with rebound member 74 and connecting member 72. The bottom surface fixedly connected with presses the post 712 under the head 711, has offered the slide hole in pressing the post 712 inside, and the connecting piece 72 stretches into the slide hole, and connecting piece 72 tip and slide hole bottom are supported through the resilience piece 74. Constraining the rebound member 74 inside the sliding hole ensures that the rebound member 74 is stable in the working process, and the two ends of the rebound member 74 do not need a connecting structure, so that the defect that the rebound member 74 is small in size and inconvenient to connect is avoided.

In order not to damage the resilient member 74 by excessive pressure during the pressing of the pressing member 71, the distance from the bottom of the pressing post 712 to the surface of the driving cylinder 73 is smaller than the length of the resilient member 74 when it is fully extended. To ensure that resilient member 74 is fully extended, stop 75 may enter into arcuate slot 65. The lower side of the limiting piece 75 is flush with the lower bottom surface of the pressing post 712.

To facilitate the installation of the pressing head 711, the compactness of the entire structure is ensured. A chute 65 is provided on the upper side of the operation handle 6, and a pressing head 711 is provided inside the chute 65.

In order to reserve enough rotation space for the electrode needle body, a rotation opening 731 is formed in the lower side of the middle of the driving barrel 73, and the upper wall of the rotation opening 731 is flush with the upper side of the electrode needle body 2. The electrode needle body 2 is fixedly connected with a driving arm at the position of the rotating opening 731, the width of the driving arm is the same as that of the rotating opening, and the driving arm can rotate along the rotating opening.

The inner wall of the sliding notch 61 is of a polygonal structure (the number of sides is large, for example, the width of each variable is 1mm or 0.5mm, the sliding notch is suitable for rotating by a small angle, the connection with the sliding head can be met, the outer wall of the sliding head 23 is also of a polygonal structure, and the sliding head 23 is suitable for limiting sliding into the sliding notch 61.

In order to connect the discharge pipeline 5 of the electrode needle body 2 and the inlet liquid, the formation of circulating hydrogen peroxide inside the electrode needle body 2 is ensured. The slider 23 includes: the left half-round 231 and the right half-round 232 may be fixedly connected together. The left semicircle body and the right semicircle body are oppositely arranged to form a cylindrical sliding head 23, and the left semicircle body 231 and the right semicircle body 232 are fixedly connected;

the middle parts of the left semicircle body 231 and the right semicircle body 232 are provided with sealing cavities, the front side and the rear side of the sealing cavities are respectively provided with an extending cavity (extending in of the electrode needle body 2) and an extending cavity (extending out of the electrode needle body 2, after the motor body 2 extends out of the extending cavity, the motor body is connected with a radio frequency generator or a microwave generator through an energy generating device connecting pipeline), and the upper side and the lower side of the sealing cavities are respectively provided with a liquid inlet cavity (entering of circulating hydrogen peroxide) and a discharge cavity (discharging of circulating hydrogen peroxide).

In the position of the discharge cavity, the discharge pipeline 5 extends out of the electrode needle body 2, the sliding head 23 extends out of the discharge cavity along the discharge cavity, and the other end of the discharge pipeline 5 is connected with a collector; the negative pressure control device 52 is provided in the discharge pipe 5 to ensure that the negative pressure state (or the positive pressure state with a small pressure) in the discharge pipe 5 is satisfied with the control of the pressure.

The electrode needle body 2 further includes: the 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 passes through the liquid inlet hole, the liquid inlet pipe 24 stretches into the cavity 3, and the other end of the liquid inlet pipe 24 is connected with the hydrogen peroxide supply device 9. Preferably, a pressure control device (ensuring proper pressure inside the liquid inlet pipe 24) is connected to the middle part of the liquid inlet pipe 24 connected to the hydrogen peroxide supply device.

For sealing the joint, a sealing shell 8 is arranged in the sealing cavity, the discharge pipeline 5 and the liquid inlet pipe 24 respectively penetrate through the sealing shell 8, and a sealing element 81 is arranged in the sealing shell 8;

the sealing element 81 is wrapped at the joint of the discharge pipeline 5, the liquid inlet pipe 24 and the electrode needle body 2, the sealing element 81 is provided with a plurality of layers, and the sealing shell 8 compresses and fixes the sealing element 81.

In order to control the temperature of hydrogen peroxide conveniently, hydrogen peroxide supply meeting the requirements is ensured. The hydrogen peroxide supply device 9 includes: a temperature control tank 91 for controlling the temperature of the hydrogen peroxide and a hydrogen peroxide storage tank 92 for storing the hydrogen peroxide. A placing opening is formed in the upper end of the temperature control tank 91, the hydrogen peroxide storage tank 92 extends into the temperature control tank 91 through the placing opening, a supporting 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 supporting frame 93.

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, so that the liquid inlet pipe 24 can enter hydrogen peroxide.

In order to ensure the supporting effect, the hydrogen peroxide storage tank 92 is fully contacted with the medium in the temperature control tank 91, so as to ensure the temperature control effect. The support frame 93 includes: the bottom of the supporting rod 931 is fixedly connected with the bottom of the temperature control tank 91, the upper end of the supporting rod 931 is fixedly connected with the top disk 932, and the top disk 932 supports the hydrogen peroxide storage tank 92.

In order to ensure the compactness of the whole structure, in particular, the integration between the hydrogen peroxide storage tank 92 and the temperature control tank 91 can be ensured. The inner wall of the placing 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.

Of course, in order to ensure that the temperature control function of the temperature control tank 91 is satisfied. The temperature control tank 91 is internally provided with a temperature control medium and a temperature control structure.

For developing 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 the inside of the pressing groove 12 is filled with a developing material.

The pressing grooves 12 are in a net structure, and the length direction of each pressing groove 12 is inclined towards the axial direction of the outer sleeve 1. Avoiding skin interference with the patient during insertion of the outer cannula into the patient.

The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the present utility model.

Claims (10)

1. A cardiac ablation needle, comprising: an outer sleeve (1) and an electrode needle body (2); the electrode needle body (2) passes through the outer sleeve (1);

the electrode needle comprises an outer sleeve (1) and is characterized in that the distal end of the electrode needle body (2) extends out of the outer sleeve, a cavity (3) is formed in the middle of the electrode needle body (2), a discharge hole (4) is formed in the distal end of the electrode needle body (2), the other end of the discharge hole (4) is communicated with the cavity (3), and hydrogen peroxide is injected into the cavity (3).

2. Cardiac ablation needle according to claim 1, characterized in that the overall structure of the discharge orifice (4) is a kinked structure;

the discharge hole (4) includes: the electrode needle comprises a plurality of axial holes (41) and a plurality of radial holes (42), wherein a plurality of the axial holes (41) and the 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 media inside the radial holes (42) is toward the proximal end of the electrode needle body (2).

3. Cardiac ablation needle according to claim 1, characterized in that the cavity (3) comprises at least two cavities, one of which injects the hydrogen peroxide solution and one of which discharges the hydrogen peroxide solution, and the junction of the two cavities extends into the discharge orifice (4).

4. A cardiac ablation needle according to claim 3, characterized in that a discharge conduit (5) is provided inside the cavity (3), a through hole (51) is provided through the discharge conduit (5) at the end of the cavity (3) to allow the interior of the discharge conduit (5) to communicate with the interior of the cavity (3);

the end part of the discharge pipeline (5) is connected with the bottom of the cavity (3) in a sealing way, the discharge hole (4) extends into the discharge pipeline (5), and a negative pressure control device is arranged at one end of the discharge pipeline (5) extending out of the cavity (3);

a ring groove is formed in the end part of the cavity (3), the size of the ring groove is matched with that of the end part of the discharge pipeline (5), the discharge pipeline (5) is inserted into the ring groove in a sealing mode, and the end part of the discharge hole (4) is formed in the center of the ring groove;

a plurality of through holes (51) are uniformly formed through the outer wall of the discharge pipeline (5).

5. Cardiac ablation needle according to claim 4, characterized in that the electrode needle body (2) comprises: an ablation section (21) and a conduction section (22); the conducting part (22) and the ablation part (21) are integrally formed, the end part of the conducting part (22) is integrally formed and connected with the ablation part (21), and the ablation part (21) is of a flat cutting edge-shaped structure.

6. The cardiac ablation needle according to claim 5, wherein the discharge hole (4) extends out of the distal end of the conducting portion (22) and is connected with an extension tube (43) at the distal end of the conducting portion (22), the lower bottom surface of the extension tube (43) is adhered and fixed with the ablation portion (21), and the length of the extension tube (43) is smaller than the length of the ablation portion (21);

a release hole is formed in the end part of the extension pipe (43);

further comprises: the proximal ends of the outer sleeve (1) and the electrode needle body (2) are respectively connected with the operating handle (6);

the proximal end of the outer sleeve (1) is provided with a connector (11), the front end of the operating handle (6) is provided with a limit notch, and the connector (11) is in limit connection with the inside of the limit notch;

the electrode needle comprises an electrode needle body (2), wherein a sliding head (23) is arranged at the proximal end of the electrode needle body (2), a sliding notch (61) is formed in the tail end of an operating handle (6), the electrode needle body (2) penetrates through the operating handle (6) to extend into the sliding notch (61), and the sliding head (23) is in limited sliding connection with the inside of the sliding notch (61);

further comprises: the sliding control device (7) is arranged in the middle of the operating handle (6), and one end of the sliding control device (7) stretches into the operating handle (6) and is connected with the electrode needle body (2), so that the sliding control device (7) drives the electrode needle body (2) to stretch out and draw back.

7. Cardiac ablation needle according to claim 6, characterized in that the sliding control means (7) comprise: a pressing member (71), a connecting member (72), and a driving cylinder (73);

the driving cylinder (73) is in relative rotation limiting connection with the electrode needle body (2), the upper side of the driving cylinder (73) is fixedly connected with the connecting piece (72), and the connecting piece (72) stretches into the pressing piece (71).

8. The cardiac ablation needle according to claim 7, wherein a through hole (62) is formed in the operating handle (6), the electrode needle body (2) is arranged through the through hole (62), limiting cavities (63) are formed in two sides above the through hole (62), and a plurality of limiting circular arc grooves (64) are formed in the upper wall of the limiting cavities (63);

the slide control device (7) further includes: the elastic piece (74) is elastically supported between the pressing piece (71) and the connecting piece (72), two sides of the lower end part of the pressing piece (71) are fixedly connected with limiting pieces (75), and the outer wall of each limiting piece (75) is in structural fit limiting connection with the corresponding circular arc groove (64);

the limiting piece (75) is of a cylindrical structure, and the diameter of the cylindrical structure is the same as that of the circular arc groove (64);

the pressing member (71) includes: the pressing head (711) and the pressing column (712), wherein the pressing column (712) is fixedly connected to the lower bottom surface of the pressing head (711), a sliding hole is formed in the pressing column (712), the connecting piece (72) stretches into the sliding hole, and the end part of the connecting piece (72) and the bottom part of the sliding hole are supported through the rebound piece (74);

the distance from the bottom of the pressing column (712) to the surface of the driving cylinder (73) is smaller than the length of the rebound piece (74) when the rebound piece is fully extended; the lower side of the limiting piece (75) is flush with the lower bottom surface of the pressing column (712);

a chute (65) is formed in the upper side of the operating handle (6), and the pressing head (711) is arranged in the chute (65).

9. The cardiac ablation needle according to claim 7, wherein a rotary opening (731) is formed in the lower side of the middle part of the driving barrel (73), and the upper wall of the rotary opening (731) is flush with the upper side of the electrode needle body (2);

the electrode needle body (2) is fixedly connected with a driving arm (25) at the position of the rotating opening (731), and the width of the driving arm (25) is the same as the width of the rotating opening (731);

the inner wall of the sliding notch (61) is of a polygonal structure, the outer wall of the sliding head (23) is also of a polygonal structure, and the sliding head (23) is matched and limited to slide into the sliding notch (61);

the slider (23) comprises: the left semicircular body (231) and the right semicircular body (232) are oppositely arranged to form a cylindrical sliding head (23), and the left semicircular body (231) and the right semicircular body (232) are fixedly connected;

the middle parts of the left semicircle body (231) and the right semicircle body (232) are provided with sealing cavities, the front side and the rear side of each sealing cavity are respectively provided with an extending cavity and an extending cavity, and the upper side and the lower side of each sealing cavity are respectively provided with a liquid inlet cavity and a discharging cavity;

in the position of the discharge cavity, the discharge pipeline (5) extends out of the electrode needle body (2), the sliding head (23) extends out of the discharge cavity, and the other end of the discharge pipeline (5) is connected with a collector;

the electrode needle body (2) further comprises: the electrode needle body (2) is provided with a liquid inlet hole at the liquid inlet cavity, the liquid inlet pipe (24) penetrates through the liquid inlet hole, the liquid inlet pipe (24) stretches into the cavity (3), and the other end of the liquid inlet pipe (24) is connected with a hydrogen peroxide supply device;

a sealing shell (8) is arranged in the sealing cavity, the discharge pipeline (5) and the liquid inlet pipe (24) respectively penetrate through the sealing shell (8), and a sealing piece (81) is arranged in the sealing shell (8);

the sealing piece (81) is wrapped at the joint of the discharge pipeline (5), the liquid inlet pipe (24) and the electrode needle body (2), the sealing piece (81) is provided with a plurality of layers, and the sealing shell (8) is tightly pressed and fixed with the sealing piece (81);

the hydrogen peroxide supply device (9) comprises: the hydrogen peroxide storage device comprises a temperature control tank (91) and a hydrogen peroxide storage tank (92), wherein a placement opening is formed in the upper end of the hydrogen peroxide storage tank (92), the hydrogen peroxide storage tank (92) stretches into the temperature control tank (91) through the placement opening, a supporting 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 supporting 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 (93) comprises: the bottom of the supporting rod (931) is fixedly connected with the bottom of the temperature control tank (91), the upper end part of the supporting rod (931) is fixedly connected with the top disk (932), and the top disk (932) supports the hydrogen peroxide storage tank (92);

the inner wall of the placing 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);

the temperature control tank (91) is internally provided with a temperature control medium and a temperature control structure.

10. The cardiac ablation needle according to any one of claims 1-4, wherein a pressing groove (12) is pressed on the outer wall of the distal end of the outer sleeve (1), and developing material is filled in the pressing groove (12);

the pressing grooves (12) are of a net-shaped structure, and the length direction of each pressing groove (12) is inclined towards the axis direction of the outer sleeve (1).