CN115886985A - Heart ablation needle - Google Patents

Abstract

The invention discloses a cardiac ablation needle, wherein an electrode needle body penetrates through an outer sleeve. The far end of the electrode needle body extends out of the outer sleeve, the middle of the electrode needle body is provided with a cavity, the far end of the electrode needle body is provided with a discharge hole, the other end of the discharge hole is communicated with the cavity, and hydrogen peroxide is injected into the cavity. The ablation needle solves the problem that in the prior art, for a patient with a large ventricular septal hypertrophy size, the position of the ablation needle can be accurately adjusted after one-time ablation is finished, and the effect of multiple times of ablation is met. This cardiac ablation needle, through seting up the cavity in electrode needle body inside, hydrogen peroxide solution in the cavity is to electrode needle body temperature control effect, and secondly hydrogen peroxide solution redox reaction, the oxygen of production gets into room interval position a small amount, has satisfied the purpose of ultrasonic development, and the position of development electrode needle body that can be accurate, the convenient accurate adjustment melts the position of melting of needle, satisfies a puncture, and multiposition melts, improves treatment.

Description

Cardiac ablation needle

Technical Field

The invention relates to the technical field of structural design of medical instruments for treating cardiac ventricular septal hypertrophy, in particular to a cardiac ablation needle.

Background

The thickening of the interventricular septum refers to the interventricular septum between the left and right ventricles, where the cardiac muscle is hypertrophied. For hypertrophy of the ventricular septum, it can be seen that under physiological conditions, such as athletes and people who exercise frequently, thickening of the ventricular septum and thickening of the left ventricle often occur. In addition, it is also seen in pathological conditions, usually hypertensive heart disease caused by hypertension, with hypertrophy of the left ventricle in the ventricular septum. For primary cardiomyopathies, such as hypertrophic cardiomyopathy patients, the patients may also develop hypertrophy in the interventricular septum.

In the prior art, the three methods, namely, the medical treatment, the thoracotomy treatment and the ablation needle treatment, have the advantages of achieving the effect, causing less wound to the patient and being beneficial to the timely recovery of the patient.

However, in the prior art, in order to ensure ablation, the ablation needle is generally limited to 9mm-16mm, and cannot ensure ablation in a wider range. The room interval hypertrophy area of part of patients reaches 40mm, the ablation effect can not be met once, but the position of the ablation needle can not be ensured under the ultrasonic development effect by adjusting the position of the ablation needle, so that the purpose of multiple times of ablation can be achieved only by a mode of multiple times of puncture, and secondary wound of the patient is caused.

Therefore, in the prior art, for a patient with a large ventricular septal hypertrophy, the position of the ablation needle can not be accurately adjusted after one-time ablation is finished, and the effect of multiple times of ablation is met.

Disclosure of Invention

In view of this, the main object of the present invention is to provide a cardiac ablation needle which can conveniently visualize the position of the working region of the ablation needle, satisfy one-time puncture, accurately adjust the position of the ablation needle, and satisfy adjustment of a larger ventricular interval region.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

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

the far end of the electrode needle body extends out of the outer sleeve, the middle part of the electrode needle body is provided with a cavity, the electrode needle comprises a cavity, and is characterized in that a discharge hole is formed in the far 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.

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

In a preferred embodiment, the discharge hole includes: the electrode needle comprises 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 holes, the axial holes are parallel to the length direction of the electrode needle body, and the flow direction of media in the radial holes is towards the near end of the electrode needle body.

In a preferred embodiment, the cavity comprises at least two cavities, wherein one cavity injects the hydrogen peroxide, and the other cavity discharges the hydrogen peroxide, and a discharge hole extends into the junction of the two cavities.

In a preferred embodiment, a discharge duct is provided inside the cavity, and a via hole is provided through the discharge duct at an end of the cavity to allow communication between the inside of the discharge duct and the inside of the cavity.

In a preferred embodiment, the end of the discharge pipe is connected to 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 opened 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 pipe is opened at the center of the ring groove.

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

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

In a preferred embodiment, the discharge hole extends out of the far end of the conduction part, an extension pipe is connected to the far 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 smaller than that of the ablation part;

the end part of the extension pipe is provided with a release hole.

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

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

in a preferred embodiment, a sliding head is arranged at the proximal end of the electrode needle body, a sliding groove opening is formed in the tail end of the operating handle, the electrode needle body penetrates through the operating handle and extends into the sliding groove opening, and the sliding head is connected inside the sliding groove opening in a sliding mode and can be limited.

In a preferred embodiment, the method further comprises: and the sliding control device is arranged in the middle of the operating handle, one end of the sliding device extends 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 and retract.

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

In a preferred embodiment, the driving cylinder is connected with the electrode needle body in a relatively rotatable limiting manner, the upper side of the driving cylinder is fixedly connected with the connecting piece, and the connecting piece extends 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 arc grooves are formed in the upper wall of each limiting cavity.

In a preferred embodiment, the slip control apparatus further includes: the elastic piece is elastically supported between the pressing piece and the connecting piece, both 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 arc groove structure.

In a preferred embodiment, the stopper is 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 piece comprises: press the head and press the post, press bottom surface fixedly connected with under the head press the post press the inside slip hole of having seted up of post, the connecting piece stretches into the slip hole, the connecting piece tip passes through with slip hole bottom the piece that kick-backs supports.

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 of the resilient member when fully extended; the locating part downside with press the bottom surface parallel and level under the post.

In a preferred embodiment, a sliding groove is formed in an upper side of the operating handle, and the pressing head is arranged inside the sliding groove.

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, a driving arm is fixedly connected to the electrode needle body at the position of the rotating port, and the width of the driving arm is the same as that of the rotating port.

In a preferred embodiment, the inner wall of the sliding groove opening is of a polygonal structure, the outer wall of the sliding head is adapted to be also of a polygonal structure, and the sliding head is adapted to slide into the sliding groove opening in a limiting manner;

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

In a preferred embodiment, a sealing cavity is formed in the middle of each of the left semicircular body and the right semicircular body, the front side and the rear side of the sealing cavity are respectively provided with an extending cavity and an extending cavity, and the upper side and the lower side of the sealing cavity are respectively provided with a liquid inlet cavity and a discharge cavity.

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

In a preferred embodiment, the electrode needle body further includes: 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 extends 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 provided inside the sealing chamber, the discharge pipe and the liquid inlet pipe respectively pass through the sealing housing, and a sealing member is provided inside the sealing housing.

In a preferred embodiment, the sealing element is wrapped at the joint of the discharge pipeline, the liquid inlet pipe and the electrode needle body, the sealing element is provided with multiple layers, and the sealing shell is used for tightly pressing and fixing the sealing element.

In a preferred embodiment, the hydrogen peroxide solution supply device includes: temperature control jar and hydrogen peroxide solution holding vessel, hydrogen peroxide solution holding vessel upper end has been seted up and has been placed the mouth, hydrogen peroxide solution holding vessel stretches into through placing the mouth inside the temperature control jar the temperature control tank bottoms portion is provided with the support frame, hydrogen peroxide solution holding vessel supports the support frame upside.

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 temperature control tank comprises a support rod and a top plate, wherein the bottom of the support rod is fixedly connected with the bottom of the temperature control tank, the upper end of the support 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 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;

in a preferred embodiment, a temperature control medium and a temperature control structure are arranged inside the temperature-controlled tank.

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

In a preferred embodiment, the indentations are in a net structure, and the length direction of each indentation is inclined towards the axial direction of the outer sleeve.

The cardiac ablation needle has the following beneficial effects:

the cardiac ablation needle comprises: the outer sleeve and the electrode needle body; the electrode needle body passes through the outer sleeve and is arranged. The far end of the electrode needle body extends out of the outer sleeve, the middle of the electrode needle body is provided with a cavity, the far end of the electrode needle body is provided with a discharge hole, the other end of the discharge hole is communicated with the cavity, and hydrogen peroxide is injected into the cavity.

The ablation needle solves the problems that in the prior art, for a patient with large ventricular septal hypertrophy, the position of the ablation needle can not be accurately adjusted after one-time ablation is finished, and the effect of multiple times of ablation is met.

This cardiac ablation needle, through seting up the cavity in electrode needle body inside, hydrogen peroxide solution in the cavity is to electrode needle body temperature control effect, and secondly hydrogen peroxide solution redox reaction, the oxygen of production gets into room interval position a small amount, has satisfied the purpose of ultrasonic development, and the position of development electrode needle body that can be accurate, the convenient accurate adjustment melts the position of melting of needle, satisfies a puncture, and multiposition melts, improves treatment.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

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 ablation portion and end of the conduction portion of FIG. 1;

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

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

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

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

FIG. 7 is an enlarged view of a portion of FIG. 6 at B;

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

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

[ description of main reference symbols ]

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 sliding head; 231. a left semi-circular body; 232. a right semicircular body;

24. a liquid inlet pipe;

25. a drive arm;

3. a cavity;

4. a discharge hole; 41. an axis hole; 42. a radial bore; 43. an extension pipe;

5. a discharge conduit; 51. a via hole; 52. a negative pressure control device;

6. an operating handle;

61. a sliding slot opening; 62. a through hole; 63. a limiting 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 member; 73. A drive cylinder; 731. A rotation port;

74. a resilient member; 75. A limiting member;

8. sealing the shell; 81. A seal member;

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

93. a support frame; 931. A support bar; 932. A top tray;

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

Detailed Description

The cardiac ablation needle of the present invention will be described in further detail with reference to the accompanying drawings and embodiments of the present invention.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction 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 exemplary embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise 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.

For ease of description, spatially relative terms such as "over … …", "over … …", "over … …", "over", etc. may be used herein to describe the spatial positional relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may be otherwise variously oriented (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 which passes through a channel is provided for the electrode needle body 2 for ablation and the electrode needle body 2 mainly plays the role of ablation. The electrode needle body 2 is arranged by penetrating through the inner cavity of the outer sleeve 1.

The far end of the electrode needle body 2 extends out of the outer sleeve 1, so that the ablation effect on the cardiac ventricular septal hypertrophy part is met.

Ultrasound is very sensitive to gases and can be shown very clearly if a site with gases is encountered during the ultrasound imaging process.

In order to ensure the ablation effect and support 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 septal hypertrophy are involved, and the area is large, and even the whole ventricular septal is completely covered (about 40 mm). In order to meet the effect of one-time treatment, the position of the electrode needle needs to be adjusted in the ablation process, the ablation area of one-time treatment is enlarged, and secondary damage to a patient is avoided. However, since the size of the whole ablation needle is long, and the developing position is arranged at the end part 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 in the ablation process, the ablation part is large, the size of the ablation part of the ablation needle is not easy to be too large, and the position of the ablation needle needs to be conveniently observed in the process of adjusting the position of the ablation needle.

A cavity 3 is formed in the middle of the electrode needle body 2, a discharge hole 4 is formed in the far 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.

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 set different problems according to different requirements.

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

Furthermore, in order to ensure that the hydrogen peroxide can completely generate an oxidation-reduction reaction in the discharging process of the discharging hole 4 (partial oxidation-reduction reaction already occurs because the ablation needle body heats the hydrogen peroxide in the circulation process in the ablation needle cavity), the length of the discharging hole 4 is increased, the flow rate is reduced, the complete oxidation-reduction reaction is ensured, and only gas enters the chamber interval position.

The discharge hole 4 has an overall structure of a bent structure, and the length of the discharge hole 4 is extended.

Further, in order to reduce the pressure of the discharge hole 4, the length of the discharge hole 4 is extended to ensure sufficient oxidation-reduction reaction of hydrogen peroxide. As shown in fig. 2, the discharge hole 4 includes: the discharge holes 4 are formed by sequentially connecting (preferably, integrally molding) the plurality of axial holes 41 and the plurality of radial holes 42 in a conductive manner. In order to further increase the number of the axial holes 41 and the radial holes 42, the overall length of the discharge holes 4 is extended. The axial hole 41 is parallel to the length direction of the electrode needle body 2, and the medium in the radial holes 42 flows towards the proximal end of the electrode needle body 2. In the process of flowing the medium through the radial holes 42, the flowing direction of the medium faces to the near end of the ablation needle, the buffer flow rate is reduced, the length of the whole discharge hole 4 can be prolonged, and the thorough oxidation-reduction reaction of hydrogen peroxide is ensured.

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

Through connecting pressure control device respectively to two cavitys, guarantee at the inside pressure of cavity 3, especially can select the negative pressure state (hydrogen peroxide solution in redox reaction process, the volume grow avoids the injection chamber interval too much gas) at the exhaust cavity to the volume of injecting gas in the assurance room interval guarantees the security of operation.

In order to facilitate the arrangement of the two cavities, the discharge pipeline 5 is arranged in the cavity 3, and a via hole 51 is formed in the end part of the cavity 3 penetrating through the discharge pipeline 5 to communicate the inside of the discharge pipeline 5 with the inside of the cavity 3. The discharge pipeline 5 is ensured to be in a negative pressure state (or a positive pressure state with lower pressure) with a set value, and the quantity of the gas entering the chamber space is controlled.

Of course, to facilitate connection to the cavity 3 and control of the pressure of the gas 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 pipe 5, it is ensured that the hydrogen peroxide flows through the via hole 51 in the flowing process. 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 hermetically inserted into the ring groove, and the end part of the discharge hole 4 is formed in the center of the ring groove; the position of the discharge pipeline 5 can be limited by setting the position of the ring groove, so that uniform cavities can be formed around the discharge pipeline 5, the cooling effect of hydrogen peroxide on the ablation needle body 2 is met, and the use safety of the ablation needle is ensured.

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

When the position of the electrode needle 2 is adjusted, if the electrode needle can only be adjusted in the axial direction of the electrode needle body, the ablation area of the ablation needle is severely limited. Especially, the interventricular septum is usually a round area hypertrophy, and if ablation is performed only in the center, the ablation effect cannot be fully achieved. Therefore, in order to meet the requirement that the ablation needle can also meet the adjustment position in the radial direction, the ablation space is enlarged. The electrode needle body 2 includes: an ablation part 21 mainly playing the role of ablation and a conduction part 22 conducting hydrogen peroxide. The conduction part 22 and the ablation part 21 are integrally formed, the end part of the conduction part 22 is integrally formed and connected with the ablation part 21, and the ablation part 21 is in a flat blade-shaped structure. The flat direction of this flat sword mouth is perpendicular with room interval thickness direction, and when needing the adjustment position, the blade can be to the room interval cutting, conveniently adjusts different positions, improves the region that the single melts. Because the adjusting area is narrow and the human body has certain flexibility, the skin puncture position of the ablation needle is not required to be adjusted, the position of the ablation part 21 can be adjusted, and the ablation effect is improved.

In order to better satisfy the determination of the position of the ablation part 21, the ablation needle can be smoothly carried out under ultrasonic observation in the position adjusting process, and the safety of the operation is ensured. The discharge hole 4 extends out of the far end of the conduction part 22, an extension pipe 43 is connected to the far 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 smaller than that of the ablation part 21;

the end of the extension pipe 43 is opened with a release hole. Therefore, the gas discharged from the discharge hole 4 is ensured to be positioned in the middle of the ablation part 21, the position of the ablation part 21 can be observed more accurately, the position of the ablation needle can be adjusted accurately in the process of income, and the quality effect is improved.

In order to facilitate holding the ablation needle, the cardiac ablation needle further comprises: the operation handle 6, the outer sleeve 1 and the near end of the electrode needle body 2 are respectively connected with the operation handle 6.

In order to ensure that the electrode needle body 2 and the outer sleeve 1 can be separated smoothly, the outer sleeve 1 can provide a channel, such as a sampling needle for sampling, so that secondary injury to a patient is avoided. The near end of the outer sleeve 1 is provided with a connector 11, the front end part of the operating handle 6 is provided with a limiting notch, the connector 11 is in limiting connection inside the limiting notch, and separable connection between the electrode needle body 2 and the outer sleeve 1 is guaranteed.

The inner wall of the limiting notch is of a polygonal structure, and the outer wall of the connector 11 is of a polygonal structure (the number of the edges is large, for example, each variable width is 1mm or 0.5mm, the connector is suitable for a small rotating angle, and connection with the connector 11 can be met).

In order to conveniently limit the electrode needle body 2, the rotation and axial telescopic adjustment of the electrode needle body 2 can be met. The electrode needle body 2 near end is provided with the sliding head 23, and the sliding groove mouth 61 has been seted up to 6 tail ends of operating handle, and electrode needle body 2 passes operating handle 6 and stretches into sliding groove mouth 61, but sliding head 23 sliding connection spacing (can pull out the rotation when rotatory, can adjust on the axis direction and stretch out and draw back) is in inside sliding groove mouth 61. The cutting edge direction of the flat-blade-shaped structure of the ablation part 21 is perpendicular to the thickness direction of the chamber interval by adjusting the position of the axis of the electrode needle body 2 and rotating the angle of the electrode needle body 2, so that preparation is made for adjusting the position of the ablation part 21 in the later period.

The adjustment and control of the axis of the electrode needle body 2 are convenient. The cardiac ablation needle further comprises: a sliding control device 7 which is used 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 axis direction is met, and after the adjustment is finished, the position of the electrode needle body 2 is limited through the sliding control device 7, so that the ablation operation of the electrode needle body 2 is ensured.

In order to facilitate the expansion and contraction control of the electrode needle body 2 in the axial direction by the slide control device 7, and after adjusting the position, the electrode needle body 2 can be defined at a fixed position. The slide control device 7 includes: a pressing piece 71 for pressing and controlling, a connecting piece 72 for connecting driving action and a driving cylinder 73 for driving action on the electrode needle body 2.

The driving cylinder 73 can be connected with the electrode needle body 2 in a relatively rotating limiting manner (a certain rotating angle can be achieved, in the process of puncture of a doctor, the angle of the electrode needle body 2 which is initially set is within a preset range, so that fine adjustment is only needed to be met), the upper side of the driving cylinder 73 is fixedly connected with the connecting piece 72, the connecting piece 72 extends into the pressing piece 71, the connecting piece 72 is driven by the pressing piece 71, the connecting piece 72 drives the driving cylinder 73, the driving cylinder 73 drives the electrode needle body 2, and the electrode needle body 2 is stretched.

In order to facilitate the connection with the electrode needle body 2, the control function of the electrode needle body 2 can be satisfied. A through hole 62 is formed in the operating handle 6, the electrode needle body 2 penetrates through the through hole 62, limiting cavities 63 are formed in two sides above the through hole 62, and a plurality of limiting arc grooves 64 are formed in the upper wall of each limiting cavity 63.

The slide control device 7 further includes: the elastic part 74 is elastically supported between the pressing part 71 and the connecting part 72, the limiting parts 75 are fixedly connected to two sides of the lower end part of the pressing part 71, and the outer walls of the limiting parts 75 are in matched limiting connection with the circular arc groove 64.

The resilient member 74 pushes the pressing member 71 to rise, so as to drive the limiting member 75 to rise, and the limiting member 75 enters the arc groove 64, so that the axial line of the electrode needle body 2 is fixed under the limiting effect.

When the position of the electrode needle body 2 needs to be adjusted, the compression resilient member 74 contracts by pressing the pressing member 71, the limiting member 75 moves down along with the pressing member 71, and when the limiting member 75 is separated from the arc groove 65, the pressing member 71 can be pushed to drive the electrode needle body 2 to stretch.

In order to facilitate the stopper 75 to enter the arc groove 64 smoothly, a limiting function can be realized. The stopper 75 has a cylindrical structure having the same diameter as the circular arc groove 64.

Two functions are provided for facilitating the pushing action and realizing the pressing action. The pressing piece 71 includes: a pressing head 711 for friction pressing; and the pressing column 712 is in fit connection with the rebound piece 74 and the connecting piece 72. The lower bottom surface of the pressing head 711 is fixedly connected with a pressing column 712, a sliding hole is formed in the pressing column 712, the connecting piece 72 extends into the sliding hole, and the end of the connecting piece 72 and the bottom of the sliding hole are supported by the resilient piece 74. The resilient member 74 is constrained inside the sliding hole, so that the stability of the resilient member 74 in the working process is ensured, and the two ends of the resilient member 74 do not need to be connected, thereby avoiding the defect of inconvenient connection due to the small size of the resilient member 74.

In order to prevent the resilient member 74 from being damaged by excessive pressure during pressing of the pressing member 71. 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 resilient member 74 when it is fully extended. To ensure that the resilient member 74 is fully extended, the retaining member 75 may enter the circular arc groove 65. The lower side of the stopper 75 is flush with the lower bottom surface of the pressing post 712.

In order to facilitate the installation of the pressing head 711, the compactness of the entire structure is ensured. A slide groove 65 is formed on the upper side of the operation handle 6, and a pressing head 711 is provided inside the slide groove 65.

In order to reserve enough rotating space for the electrode needle body, a rotating opening 731 is formed in the lower side of the middle of the driving cylinder 73, and the upper wall of the rotating 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 rotation port 731, the width of the driving arm is the same as that of the rotation port, and the driving arm can rotate along the rotation port.

The inner wall of the sliding groove opening 61 is of a polygonal structure (the number of edges is large, for example, each variable width is 1mm or 0.5mm, the sliding groove opening adapts to a small rotation angle, connection with the sliding head can be met), the outer wall of the sliding head 23 adapts to the polygonal structure, and the sliding head 23 adapts to the inside of the sliding groove opening 61 in a limiting mode.

In order to connect the discharge pipeline 5 of the electrode needle body 2 and the liquid inlet, the electrode needle body 2 is ensured to form circulating hydrogen peroxide. The slider 23 includes: a left half-body 231 and a right half-body 232 which can 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;

sealed chamber has been seted up at left semicircle body 231 and right semicircle body 232 middle part, both sides have been seted up respectively around the sealed chamber and have been stretched into the chamber (stretching into of electrode needle body 2) and stretch out the chamber (stretching out of electrode needle body 2, after motor body 2 stretches out this and stretches out the chamber, be connected with radio frequency generator or microwave generator through energy generation device connecting line), feed liquor chamber (the entering of circulation hydrogen peroxide solution) and discharge chamber (the discharge of circulation hydrogen peroxide solution) have been seted up respectively to the downside in sealed chamber.

At 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 the collector; the discharge pipe 5 is provided with a negative pressure control device 52 for ensuring that the negative pressure state (or the positive pressure state with a small pressure) in the discharge pipe 5 satisfies the pressure control.

The electrode needle body 2 further includes: liquid inlet pipe 24, electrode needle body 2 have seted up the feed liquor hole in feed liquor chamber department, and feed liquor pipe 24 passes the feed liquor hole and sets up, and feed liquor pipe 24 stretches into inside cavity 3, and hydrogen peroxide solution feeding device 9 is connected to the feed liquor pipe 24 other end. Preferably, a pressure control device is connected to the middle position of the hydrogen peroxide solution supply device connected to the liquid inlet pipe 24 (to ensure proper pressure inside the liquid inlet pipe 24).

In order to seal the connection, 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 conveniently control the temperature of the hydrogen peroxide and ensure the supply of the hydrogen peroxide meeting the requirements. The hydrogen peroxide solution 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. Seted up in control by temperature change jar 91 upper end and placed the mouth, inside hydrogen peroxide solution storage tank 92 stretched into control by temperature change jar 91 through placing the mouth, was provided with support frame 93 bottom control by temperature change jar 91, and hydrogen peroxide solution storage tank supports at support frame 93 upside.

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 can be ensured to be fully contacted with the medium in the temperature control tank 91, and the temperature control effect is ensured. This support frame 93 includes: a supporting rod 931 and a top plate 932, 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 plate 932, and the top plate 932 supports the hydrogen peroxide storage tank 92.

In order to ensure the compactness of the whole structure, the hydrogen peroxide storage tank 92 and the temperature control tank 91 can be integrated. 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. A temperature control medium and a temperature control structure are provided inside the temperature control tank 91.

In order to develop the position of the outer sleeve 1, a pressure groove 12 is pressed on the outer wall of the far end of the outer sleeve 1, and the pressure groove 12 is filled with a developing material.

The pressure grooves 11 are of a net structure, and the length direction of each pressure groove 12 is inclined towards the axial direction of the outer sleeve 1. Avoiding skin interference between the outer cannula and the patient during the process of inserting the outer cannula into the patient.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims (10)

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

the electrode needle comprises an outer sleeve (1), a cavity (3) is formed in the middle of the electrode needle body (2), a discharge hole (4) is formed in the far 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. A cardiac ablation needle according to claim 1, wherein the discharge orifice (4) is generally configured as a meander-like structure;

the discharge hole (4) includes: the electrode needle comprises a plurality of axial holes (41) and a plurality of radial holes (42), wherein the axial holes (41) and the radial holes (42) are sequentially connected to form the discharge holes (4), the axial holes (41) are parallel to the length direction of the electrode needle body (2), and the medium in the radial holes (42) flows to the near end of the electrode needle body (2).

3. A cardiac ablation needle according to claim 1, wherein the cavity (3) comprises at least two cavities, one of which injects the hydrogen peroxide and the other of which discharges the hydrogen peroxide and extends into the discharge hole (4) at the junction of the two cavities.

4. A cardiac ablation needle according to claim 3, wherein a discharge conduit (5) is arranged inside the cavity (3), and a through hole (51) is formed through the discharge conduit (5) at the end of the cavity (3) to communicate the inside of the discharge conduit (5) with the inside of the cavity (3);

the end part of the discharge pipeline (5) is hermetically connected with the bottom of the cavity (3), 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 hermetically inserted into the ring groove, 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. A cardiac ablation needle according to any one of claims 1 to 4, wherein the electrode needle body (2) comprises: an ablation section (21) and a conduction section (22); the guiding part (22) and the ablation part (21) are integrally formed, the end part of the guiding part (22) is integrally formed and connected with the ablation part (21), and the ablation part (21) is of a flat blade-shaped structure.

6. A cardiac ablation needle according to claim 5, wherein the discharge hole (4) extends out of the conduction part (22) at the far end, an extension tube (43) is connected to the conduction part (22) at the far end, 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 smaller than that of the ablation part (21);

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

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

a connector (11) is arranged at the near end of the outer sleeve (1), a limiting notch is formed in the front end part of the operating handle (6), and the connector (11) is connected to the inside of the limiting notch in a limiting manner;

the electrode needle comprises an electrode needle body (2), and is characterized in that a sliding head (23) is arranged at the near 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) and extends into the sliding notch (61), and the sliding head (23) is connected inside the sliding notch (61) in a sliding manner in a limiting manner;

further comprising: the electrode needle comprises a sliding control device (7), the sliding control device (7) is arranged in the middle of an operating handle (6), one end of the sliding device (7) extends into the interior of the operating handle (6) and is connected with an electrode needle body (2), and the electrode needle body (2) is driven by the sliding control device (7) to stretch and retract.

7. A cardiac ablation needle according to claim 6, wherein the sliding control means (7) comprises: a pressing piece (71), a connecting piece (72) and a driving cylinder (73);

the driving cylinder (73) is connected with the electrode needle body (2) in a relatively rotatable limiting manner, the upper side of the driving cylinder (73) is fixedly connected with the connecting piece (72), and the connecting piece (72) extends 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), a limiting cavity (63) is formed in each of two sides above the through hole (62), and a plurality of limiting arc grooves (64) are formed in the upper wall of each limiting cavity (63);

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

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

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

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

9. The cardiac ablation needle as claimed in claim 7, wherein a rotary port (731) is formed in the lower middle of the driving cylinder (73), and the upper wall of the rotary port (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 port (731), and the width of the driving arm (25) is the same as that of the rotating port (731);

the inner wall of the sliding groove opening (61) is of a polygonal structure, the outer wall of the sliding head (23) is adapted to be of a polygonal structure, and the sliding head (23) is matched with a limit to slide into the sliding groove opening (61);

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

the middle parts of the left semicircular body (231) and the right semicircular 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 discharge cavity;

at 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) extends 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 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) is used for pressing and fixing the sealing element (81);

the hydrogen peroxide solution supply device (9) comprises: the hydrogen peroxide storage tank is characterized by comprising a temperature control tank (91) and a hydrogen peroxide storage tank (92), wherein a placing opening is formed in the upper end of the hydrogen peroxide storage tank (92), the hydrogen peroxide storage tank (92) extends into the temperature control tank (91) through the placing 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: 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 plate (932), and the top plate (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);

and a temperature control medium and a temperature control structure are arranged in the temperature control tank (91).

10. A cardiac ablation needle according to any one of claims 1 to 4, characterized in that the outer wall of the distal end of the outer sleeve (1) is pressed with an indent (12), and the inside of the indent (12) is filled with a developing material;

the pressure grooves (11) are of a net structure, and the length direction of each pressure groove (12) is inclined towards the axis direction of the outer sleeve (1).

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