CN218356352U - Catheter clamping structure, catheter handle and ablation electrode catheter assembly comprising same - Google Patents

Abstract

The utility model provides a catheter clamping structure, a catheter handle and an ablation electrode catheter assembly comprising the same, wherein a catheter clamping piece of the catheter clamping structure comprises a first connecting pipe and a plurality of clamping pieces arranged on the end surface of the first connecting pipe, and a first inserting hole is formed in the middle of the plurality of clamping pieces; the end face of the catheter pushing piece is provided with a first connecting hole, and a first connecting pipe is inserted into the first connecting hole; the head of the pushing element is sleeved at the end part of the catheter pushing element, the head of the pushing element surrounds the catheter clamping element, the head of the pushing element is provided with a second insertion hole communicated with the first insertion hole, and the second insertion hole and the first insertion hole are used for accommodating an ablation electrode catheter. The plurality of clamping pieces of the catheter clamping piece are tightened under the extrusion of the head of the pushing piece, so that the ablation electrode catheter is clamped, the ablation electrode catheter and the catheter handle are more firmly installed, the ablation electrode catheter is prevented from shaking in the operation process, and the efficiency and the success rate of the ablation operation are improved.

Description

Catheter clamping structure, catheter handle and ablation electrode catheter assembly comprising catheter handle

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to pipe clamping structure, pipe handle and contain its ablation electrode catheter subassembly.

Background

Atrial fibrillation is an arrhythmia with uncoordinated electrical activity of the atria, resulting in ineffective atrial contraction, which can clinically cause various serious diseases such as arrhythmia, stroke, heart failure, even fatal cardiac embolism and the like.

The pulmonary vein is the main cause of atrial fibrillation due to the presence of pulmonary vein cuffs. Myocardial cell colonies are present between the inner and outer membranes of the pulmonary veins, and since the cells forming the myocardial sleeves have a different origin and different electrophysiological properties from those of the atrial muscle, abnormally excited substrates are formed, resulting in atrial fibrillation.

The advanced stage of atrial fibrillation leads to heart failure, which is an incurable disease and threatens the life of the patient all the time. The operation treatment method for treating atrial fibrillation mainly comprises three types of radio frequency ablation, cryoablation and pulse ablation, and the pulse ablation does not generate heat, so that the damage to tissues caused by the radio frequency ablation, the cryoablation and the like is avoided, the targeting property is stronger, and more attention is paid to the current pulse ablation.

The pulse ablation is to perform unilateral ablation on the great visceral nerves through a catheter, so that the sympathetic nervous system is recovered to be normal, then the viscera is returned to be normal and contracted, blood in a human body is distributed again, the pressure of the heart and the lung is normalized, and finally the symptoms of heart failure are reduced. Other tissues near the pulmonary vein can be protected from being affected during the course of the nerve therapy.

An ablation electrode catheter assembly used in a pulse ablation procedure generally consists of a catheter handle and an ablation electrode catheter. In the actual use process, the ablation electrode catheter is arranged on the catheter handle, so that the problems that the installation is not firm and the catheter shakes often occur.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pipe centre gripping structure, pipe handle and contain its ablation electrode catheter subassembly for solve to ablate that the electrode catheter is installed on the pipe handle, appear the installation insecure, the problem that the pipe appears rocking.

In order to achieve the above object, the present invention provides the following technical solutions.

The utility model provides a conduit clamping structure, the conduit clamping structure is used for installing an ablation electrode conduit, the conduit clamping structure comprises a conduit clamping piece, a conduit pushing piece and a pushing piece head part, the conduit clamping piece comprises a first connecting pipe and a plurality of clamping pieces arranged on the end surface of the first connecting pipe, and a first inserting hole is formed in the middle of the plurality of clamping pieces; a first connecting hole is formed in the end face of the catheter pushing piece, and the first connecting pipe is inserted into the first connecting hole; the head of the pushing element is sleeved at the end of the catheter pushing element, the head of the pushing element surrounds the catheter clamping element, the head of the pushing element is provided with a second insertion hole communicated with the first insertion hole, and the second insertion hole and the first insertion hole are used for accommodating the ablation electrode catheter.

Preferably, the free end of the clamping sheet far away from the first connecting pipe forms an inclined surface, and the inclined surface forms an acute angle with the axis of the first connecting pipe; the inner circumferential surface of the head of the pushing piece is provided with a matching surface which is contacted with the inclined surface.

Preferably, the clamping sheet is away from the outer peripheral surface of the free end of the first connecting pipe and expands outwards to form an outward expanding surface, and the outward expanding surface is intersected with the inclined surface.

Preferably, an angle α =15 ° to 60 ° between the flared surface and the axis of the first connecting pipe, and an angle β =50 ° to 90 ° between the extending surface of the flared surface and the inclined surface, α < β.

The utility model also provides a catheter handle, which comprises a catheter clamping structure and a handle shell, wherein the catheter clamping structure is described in the technical scheme; a second connecting hole is formed in the handle shell, a catheter pushing piece of the catheter clamping structure is inserted into the second connecting hole, and the first connecting hole and the second connecting hole form a channel for a pull wire and an electrode lead to pass through.

Preferably, the outer circumferential surface of the catheter pushing member is provided with at least one groove, and the groove is arranged around the circumference of the catheter pushing member; the catheter handle further comprises at least one rubber ring, the rubber ring is installed in the groove, and the rubber ring is in contact with the inner circumferential surface of the second connecting hole.

Preferably, the outer circumferential surface of the catheter pushing member is provided with a limiting groove, and the limiting groove extends along a direction parallel to the axial direction of the catheter pushing member; a limiting hole is formed in the handle shell and penetrates through the inner peripheral surface of the second connecting hole; the catheter handle further comprises a limiting pin, and the limiting pin can penetrate through the limiting hole to be inserted into the limiting groove.

Preferably, a first groove and a second groove are formed on the outer peripheral surface of the catheter pushing member, the first groove and the second groove are arranged around the circumference of the catheter pushing member, and the limiting groove is located between the first groove and the second groove; the catheter handle further comprises a first sealing ring and a second sealing ring, the first sealing ring is installed in the first groove, the second sealing ring is installed in the second groove, and the first sealing ring and the second sealing ring are in contact with the inner circumferential surface of the second connecting hole.

Preferably, one end of the first connection hole, which is far away from the catheter clamp, is provided with an outer flaring, and the diameter of the outer flaring is gradually increased along the direction far away from the catheter clamp.

Preferably, the handle housing further comprises a wire drawing port penetrating to an inner peripheral surface of the second connecting hole; the catheter handle further comprises a supporting fixing disc, the supporting fixing disc is fixed in the second connecting hole, the supporting fixing disc surrounds the wire pulling port, a wire pulling fixing port penetrating through the supporting fixing disc along the axial direction is formed in the supporting fixing disc, and a wire pulling channel enabling the wire pulling to stretch out of the handle shell is formed between the wire pulling fixing port and the wire pulling port.

Preferably, the catheter handle further comprises a support fixing disc fixed in the second connecting hole; the tail end of the handle shell is further provided with a generator connecting portion, the supporting fixing disc is located between the generator connecting portion and the catheter pushing member, the supporting fixing disc is provided with an electrode wire perforation hole which penetrates through the supporting fixing disc along the axial direction, and the electrode wire perforation hole is used for enabling an electrode wire to pass through and extend to the generator connecting portion.

The utility model also provides an ablation electrode catheter subassembly, including ablation electrode catheter and pipe handle, the pipe handle is as above-mentioned technical scheme, ablation electrode catheterization inserts in second patchhole, the first patchhole.

Compared with the prior art, the beneficial effect of this application lies in: according to the catheter clamping structure, the catheter handle and the ablation electrode catheter assembly comprising the catheter handle, the clamping pieces of the catheter clamping piece are tightened under the extrusion of the head of the pushing piece, so that the ablation electrode catheter is clamped, the ablation electrode catheter and the catheter handle are more firmly installed, the ablation electrode catheter cannot shake in the operation process, and the efficiency and the success rate of an ablation operation are improved.

Drawings

The technical features and advantages of the present invention are more fully understood by referring to the following detailed description in conjunction with the accompanying drawings.

Fig. 1 is a schematic structural view of an ablation electrode catheter assembly according to the present invention.

Fig. 2 is a schematic view of another angle configuration of the ablation electrode catheter assembly of fig. 1.

Fig. 3 is a schematic structural view of an ablation electrode tip of the ablation electrode catheter assembly of fig. 1.

Fig. 4 shows a top view of the ablation electrode tip of fig. 3.

Fig. 5 is a schematic illustration of electrode pulses for the ablation electrode tip of fig. 3.

Fig. 6 shows a schematic diagram of a single pulse of the electrode pulses shown in fig. 5.

Fig. 7 is a schematic view showing a structure of an ablation electrode catheter of the ablation electrode catheter assembly shown in fig. 1.

Fig. 8 is a schematic view showing the internal structure of the ablation electrode catheter shown in fig. 7.

Fig. 9 is a schematic view of a catheter handle of the ablation electrode catheter assembly of fig. 1.

Fig. 10 is an exploded view of the structure of the catheter handle of fig. 9.

Fig. 11 is an enlarged view of a portion of the area a of the catheter handle shown in fig. 10.

Fig. 12 shows a cross-sectional view of the catheter handle of fig. 9.

FIG. 13 shows a cross-sectional view of the catheter gripping structure of the catheter handle of FIG. 12.

Fig. 14 is a schematic view of the conduit gripping device shown in fig. 13 in the conduit gripping configuration.

Fig. 15 is a schematic view of another angle of the catheter clamp of fig. 13.

Fig. 16 shows a map of cardiac stroma for a patient before ablation.

FIG. 17 is a graph of cardiac electrical signals of the patient of FIG. 16 prior to ablation.

Fig. 18 shows a cardiac stroma map of the patient of fig. 16 after ablation.

FIG. 19 is a graph of cardiac electrical signals of the patient of FIG. 16 after ablation.

Description of the reference numerals

The ablation electrode catheter comprises an ablation electrode catheter 100, an ablation electrode head 101, a guide tube 102, a spiral ring 103, an electrode 104, a central end 105, a free end 106, a shaping framework 107, an outer ring 108, a pressure sensor 109, a temperature sensor 110, a pull wire 111, a rebound spring 112, a pull wire sleeve 113, a bending adjusting catheter 114, a main catheter 115 and an electrode lead 116;

the catheter comprises a catheter handle 200, a catheter clamping structure 201, a handle shell 202, a catheter clamping element 203, a catheter pushing element 204, a pushing element head 205, a first connecting pipe 206, a clamping sheet 207, a first insertion hole 208, a first connecting hole 209, a second insertion hole 210, an inclined surface 211, a matching surface 212, an outer expanding surface 213, a second connecting hole 214, a limiting groove 215, a limiting hole 216, an electrode lead perforation 217, a first groove 218, a second groove 219, a first sealing ring 220, a second sealing ring 221, an outer expanding opening 222, a supporting fixing disc 223, a wire drawing opening 224, a wire drawing fixing opening 225 and a generator connecting part 226.

Detailed Description

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as is understood by those of ordinary skill in the art to which the invention belongs.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

Fig. 1 to 2 are schematic views showing the structure of the ablation electrode catheter assembly of the present invention. The ablation electrode catheter assembly includes an ablation electrode catheter 100 and a catheter handle 200. Wherein, the ablation electrode catheter 100 includes an ablation electrode tip 101 and a guide tube 102, the ablation electrode tip 101 is inserted into a port of the guide tube 102, and the guide tube 102 is used for being inserted into the catheter handle 200. During treatment, the ablation electrode catheter 100 is extended into the blood vessel, leaving the catheter handle 200 outside the body. When the ablation electrode tip 101 reaches the target region, the shape of the ablation electrode tip 101 can be changed by manipulating the pull wire on the catheter handle 200 to cause the electrode of the ablation electrode tip 101 to conform to the ostium of the pulmonary vein to ablate the target tissue.

Fig. 3 to 4 show an embodiment of the ablation electrode tip 101, the ablation electrode tip 101 includes a spiral ring 103 and a plurality of electrodes 104, the electrodes 104 are located on the outer circumferential surface of the spiral ring 103, the center end 105 of the spiral ring 103 is used for fixing, the end of the spiral ring 103 away from the guide tube 102 is a free end 106, and the spiral ring 103 is spirally bent under an unstressed state. The distance from the spiral ring 103 to the central end 105 of the spiral ring 103 gradually increases in a direction approaching the free end 106 of the spiral ring 103, i.e. the spiral ring 103 has a tendency to gradually flare from the central end 105 to the free end 106. Due to the structural design of the spiral ring 103, the adjacent electrodes can be prevented from contacting after expansion, and particularly the problem of contact between the positive electrode and the negative electrode can be avoided. When the pulmonary vein orifice is attached, the free end 106 can be attached firstly, and the spiral ring 103 is gradually pressed on the pulmonary vein orifice, so that better effect of attaching to the pulmonary vein orifice can be ensured.

The spiral ring 103 comprises a shaped framework 107 and an outer ring 108, the shaped framework 107 is made of shape memory alloy, and the original shape of the shaped framework 107 is consistent with the shape of the spiral ring 103 in an unstressed state; the outer ring 108 is wrapped on the shaping framework 107, and the electrode 104 is positioned on the outer peripheral surface of the outer ring 108. The shaping framework 107 is made of shape memory alloy, which can ensure that the spiral ring 103 always keeps a gradually outward-expanding shape under an unstressed state.

As shown in fig. 3, the number of the electrodes 104 is 2N, N being a natural number of 3 to 8; the electrodes 104 include positive electrodes and negative electrodes arranged in a crossing manner. The number of electrodes 104 ensures optimal ablation.

As shown in fig. 3, the ablation electrode tip 101 further includes a plurality of pressure sensors 109, the pressure sensors 109 are disposed on the outer peripheral surface of the spiral ring 103 at a side facing the pulmonary vein ostium, and the pressure sensors 109 are configured to detect a pressure value and output the pressure value to a pressure monitoring device. The pressure sensor 109 can measure the pressure of the ablation electrode tip 101 on an ablation site at any time; the pressure monitoring device can monitor the pressure at the ablation site at any time and display the pressure in real time so as to better detect whether the electrode 104 is attached to the ablation site.

Wherein, the number of the pressure sensors 109 is M, and M is 3 or 4; the helical ring 103 is equally divided into M segments with a pressure sensor 109 located on the side of each segment remote from the free end 106. By the evenly arranged pressure sensors 109, it is ensured that the pressure values of the respective ablation sites can be measured comprehensively.

The ablation electrode head 101 further comprises a plurality of temperature sensors 110, the temperature sensors 110 are disposed on one side of the outer peripheral surface of the spiral ring 103 facing the pulmonary vein ostium, and the temperature sensors 110 are used for detecting temperature and outputting the temperature to a temperature monitoring device. By providing the temperature sensor 110, the temperature of the ablation site can be monitored at any time, thereby adjusting the treatment regimen in real time.

As shown in fig. 3, the helical ring 103 is rotated more than 360 ° around the central end 105. Spiral ring 103 is greater than 360 around the rotation angle of central point 105, like 380, 400 etc, can melt bigger area or ring at every turn, can improve and melt efficiency, avoids rotatory pipe many times, and this is because at the operation in-process, the resistance that the pipe received is great, during twist grip, and the distal end electrode is hardly kept in step with the handle, does not change even, the utility model discloses a enlarge the electrode angle, can once only melt the tissue of bigger area, also correspondingly reduced the operation time. The distance in the axial direction parallel to the overlapping region of the spiral rings 103 is h, and the diameter D = (2 to 8) h of the spiral rings 103. The overlapped areas of the spiral rings 103 keep a certain distance, so that the spiral rings 103 are staggered to form two layers, and one-time ablation can be more complete.

As shown in FIGS. 5 to 6, taking an electrode with a diameter of 13 to 15mm as an example, the high and low voltages applied to the two ends of the electrode are + -600V to + -1500V; the number of pulse groups discharged by the pulse electric field each time is 1-20, and each pulse group comprises 60-200 pulses; the time interval of adjacent pulse groups of the pulse electric field is 500-3000 ms. The time interval of the pulse group of the electrode is 500ms, 800ms, 1000ms, 1500ms, 2000ms, 2500ms, 3000ms, or the like; each pulse comprises a positive high pulse, a positive low pulse, a negative high pulse and a negative low pulse; the pulse width of the positive high pulse is 4-12 us, the pulse width of the negative high pulse is 4-12 us, the pulse width of the positive low pulse is 2-4 us, and the pulse width of the negative low pulse is 400-3000 us. The discharge time of a single pulse is the sum of the pulse widths of the above 4 pulses; the pulse width of the positive high pulse of the single pulse is 4-12 us, the pulse width of the negative high pulse is 4-12 us, the pulse width of the positive low pulse is 2-4 us, and the pulse width of the negative low pulse is 400-3000 us. When the parameters of the electrode 104 are set within the above ranges, the cells of the tissue causing abnormal electrical potential may be broken down and the normal function of other tissues may not be affected when the ablation electrode catheter 100 is used for surgery.

When the ablation electrode catheter 100 is used for operation, firstly, electrodes are used for mapping intracavitary electrocardiosignals of a patient, then, the ablation electrode catheter 100 is used for respectively conducting pulsed electric field ablation on four pulmonary veins of a Left Superior Pulmonary Vein (LSPV), a Left Inferior Pulmonary Vein (LIPV), a left superior pulmonary vein (RSPV) and a left superior pulmonary vein (RIPV) of the patient, ablation parameters shown in table 1 are used, only 50 seconds are used for successfully realizing pulmonary vein isolation, and finally, CS S1S1 (S1S 2) pacing stimulation is used for confirming that atrial fibrillation is not induced, so that the operation effect is good. After completion of the pulsed electric field ablation procedure, the matrix-mapped pulmonary vein low voltage indicates that the four pulmonary veins have been completely isolated. By adopting the ablation electrode catheter 100, the operation time is greatly shortened, meanwhile, the selective ablation of cardiac muscle cells is realized, the integrity of tissue matrix is kept, surrounding tissues are not damaged, and the efficiency and the success rate of the ablation operation are improved.

TABLE 1 intraoperative ablation parameter setting table

The ablation effect of the patient in the operation 3 is selected to illustrate the ablation effect of the electrode catheter provided by the invention. Parameters before and after the operation are shown in fig. 16-fig. 19, before the ablation, obvious electric signals are detected at 730ms of 4 Pulmonary Veins (PV), and after the ablation, the electric signals at the pulmonary veins are weak or even have no electric signals, which indicates that the ablation has successfully blocked the transmission of the electric signals, the original feeling of palpitation disappears, and the electrocardiogram of the reexamination of the patient after the operation shows that the sinus rhythm is obtained.

As shown in fig. 7 to 8, when the ablation electrode tip 101 is mounted on the guide tube 102, the ablation electrode catheter 100 further includes an adjustment assembly mounted in the guide tube 102 for adjusting the position of the ablation electrode tip 101.

The adjusting assembly comprises a pull wire 111 and a rebound spring 112, the outer ring 108 of the ablation electrode head 101 is inserted into a port of the guide tube 102, and the guide tube 102 is used for being inserted into the guide handle 200; one end of a pull wire 111 is connected with the end part of the shaping framework 107, and the other end of the pull wire 111 penetrates out of the guide tube 102; a return spring 112 is mounted in the guide tube 102, and the return spring 112 always applies a force to the pulling wire 111 in a direction toward the ablation electrode tip 101.

Pulling the pull wire 111 can bend one end of the guide tube 102 close to the ablation electrode tip 101, thereby adjusting the direction of the ablation electrode tip 101 to facilitate treatment. And the rebound spring 112 can provide restoring force for the pulling wire 111, so that the guide tube 102 is restored to the original state when the pulling wire 111 is not stressed.

As shown in fig. 8, the ablation electrode catheter 100 further includes a pull wire sleeve 113, the fixed framework 107 and the pull wire 111 are respectively fixed at two ends of the pull wire sleeve 113, the resilient spring 112 is sleeved on the pull wire 111, one end of the resilient spring 112 abuts against the pull wire sleeve 113, and the other end of the resilient spring 112 abuts against the inner circumferential surface of the guide tube 102. When the pull wire 111 is pulled, the rebound spring 112 is compressed, and the guide tube 102 is bent; when the pull wire 111 is not stressed, the rebound spring 112 is restored, and the guide tube 102 is restored to the original state.

In order to better realize the bending of one end of the guide tube 102 close to the ablation electrode head 101, the guide tube 102 comprises a bending adjusting guide tube 114 and a main guide tube 115, the bending adjusting guide tube 114 is made of bendable material, the outer ring 108 of the ablation electrode head 101 is inserted into one end of the bending adjusting guide tube 114, the other end of the bending adjusting guide tube 114 is fixed with one end of the main guide tube 115, and the other end of the main guide tube 115 is used for being inserted into the catheter handle 200. When the material of the bending catheter 114 is selected, a material which is easier to bend is selected, so that the ablation electrode head 101 can be bent better.

As shown in fig. 8, the ablation electrode catheter 100 further includes an electrode lead 116, the electrode lead 116 is connected to the electrode 104, and the electrode lead 116 passes through the outer ring 108 and the guide tube 102. Electrode leads 116 are used to connect the electrodes 104 to the electrode control elements.

The guide tube 102 is divided into at least two independent channels, the two independent channels are a lead channel and a pull line channel respectively, the electrode lead 116 passes through the lead channel, and the pull line 111 passes through the pull line channel. The cross section of the wire passage is eccentric, which can provide eccentric force for the wire 111.

As shown in fig. 9 to 12, when the ablation electrode catheter 100 is attached to the catheter handle 200, the guide tube 102 is held by the catheter holding structure 201 and then attached to the handle housing 202. Specifically, the catheter clamping structure 201 comprises a catheter clamping element 203, a catheter pushing element 204 and a pushing element head 205, wherein the catheter clamping element 203 comprises a first connecting pipe 206 and a plurality of clamping sheets 207 arranged on the end face of the first connecting pipe 205, and a first insertion hole 208 is formed in the middle of the plurality of clamping sheets 207; the end surface of the catheter pusher 204 forms a first connection hole 209, and the first connection tube 205 is inserted into the first connection hole 209; the pusher head 205 is sleeved on the end of the catheter pusher 204, the pusher head 205 surrounds the catheter clamping element 203, the pusher head 205 is provided with a second insertion hole 210 communicated with the first insertion hole 208, and the second insertion hole 210 and the first insertion hole 208 are used for accommodating the guide tube 102.

Wherein, the catheter pusher 204 and the pusher head 205 can be connected by threads. When the guide tube 102 needs to be installed, the guide tube 102 passes through the second insertion hole 210 of the pushing element head 205 and the first insertion hole 208 of the catheter clamping element 203 in sequence, and then the pushing element head 205 is rotated to connect the pushing element head 205 with the catheter pushing element 204. The plurality of gripping tabs 207 of the catheter clamp 203 are tightened under compression of the pusher head 205, thereby gripping the guide tube 102.

As shown in fig. 14 to 15, in order to better grip the guide tube 102, the free end of the gripping tab 207 remote from the first connection tube 205 forms an inclined surface 211, the inclined surface 211 being at an acute angle to the axis of the first connection tube 205; the inner peripheral surface of the pusher head 205 has a mating surface 212 that contacts the inclined surface 211. When the pinching pieces 207 are pressed by the pusher head 205, the pinching pieces 207 are drawn toward the center by the inclined surface 211, so that the first insertion hole 208 becomes small, and the guide tube 102 is clamped.

The outer peripheral surface of the snap tab 207 remote from the free end of the first connecting tube 205 is flared outwardly to form a flared surface 213, and the flared surface 213 intersects the inclined surface 211. The flared surface 213 and the inclined surface 211 constitute a convex reinforcing portion which secures the strength of the free end of the clamping flap 207 so that the clamping flap 207 can more stably clamp the guide tube 102.

As shown in fig. 15, the included angle α =15 ° to 60 °, such as 20 °, 30 °, 35 °, 40 °, 45 °, 50 °, 55 °, and so on, between the flaring surface 213 and the axis of the first connecting tube 205. The angle β =50 ° -90 °, such as 55 °, 60 °, 65 °, 70 °, 75 °, 80 °, 85 °, etc., between the extended surface of the flared surface 213 and the inclined surface 211, and α < β. The provision of the outwardly extending surface 213 and the inclined surface 211 within the above-mentioned angular range can facilitate the manufacture of the clip sheet 207 while ensuring the strength of the free end of the clip sheet 207.

As shown in fig. 9 to 12, the catheter retaining structure 201 is mounted on the handle housing 202, a second connecting hole 214 is formed in the handle housing 202, the catheter pushing member 204 of the catheter retaining structure 201 is inserted into the second connecting hole 214, and the first connecting hole 209 and the second connecting hole 214 form a passage for the pull wire 111 and the electrode lead 116 to pass through. In this manner, the ablation electrode catheter 100 can be coupled to the handle housing 202. During operation, the handle housing 202 is located outside the body for manipulation by the operator.

As shown in fig. 10 to 14, the outer circumferential surface of the catheter pushing member 204 is formed with a limiting groove 215, and the limiting groove 215 extends in a direction parallel to the axial direction of the catheter pushing member 204; a limiting hole 216 is formed in the handle shell 202, and the limiting hole 216 penetrates through the inner peripheral surface of the second connecting hole 214; the catheter handle 200 also includes a stop pin that can be inserted through the stop hole 216 into the stop slot 215. When the catheter pushing element 204 is inserted into the second connecting hole 214, the limiting pin is inserted into the limiting groove 215 through the limiting hole 216, which prevents the catheter pushing element 204 from rotating in the handle housing 202.

A first groove 218 and a second groove 219 are formed on the outer peripheral surface of the catheter pushing member 204, the first groove 218 and the second groove 219 are arranged around the circumference of the catheter pushing member 204, and the limiting groove 215 is located between the first groove 218 and the second groove 219; the catheter handle 200 further includes a first sealing ring 220 and a second sealing ring 221, the first sealing ring 220 is mounted in the first groove 218, the second sealing ring 221 is mounted in the second groove 219, and the first sealing ring 220 and the second sealing ring 221 are in contact with the inner circumferential surface of the second connection hole 214. The first sealing ring 220 and the second sealing ring 221 may be made of rubber. Due to the arrangement of the first sealing ring 220 and the second sealing ring 221, a seal is formed between the catheter pushing member 204 and the handle shell 202, and blood in a human body is prevented from overflowing from the handle shell 202 to the outside.

In other embodiments, a groove may be formed on the outer circumferential surface of the catheter pusher 204 at other positions, and a sealing ring may be installed in the groove according to the sealing requirement.

As shown in fig. 12-13, an end of the first connection hole 209 remote from the catheter clamp 203 forms an outer flare 222, and the diameter of the outer flare 222 gradually increases in a direction away from the catheter clamp 203. By providing the outer flare 222 at the end of the first connection hole 209, a larger active space can be provided for the pull wire 111 and the electrode lead 116.

As shown in fig. 12, the catheter handle 200 further includes a support fixing plate 223, and the support fixing plate 223 is fixed in the second coupling hole 214. And a support fixing plate 223 for supporting the wire 111 and the electrode lead 116 so that the wire 111 and the electrode lead 116 can extend to a predetermined position along a predetermined extending direction.

Specifically, the handle case 202 further includes a wire drawing port 224, the wire drawing port 224 penetrates through the inner circumferential surface of the second connection hole 214, the support fixing plate 223 is disposed around the wire drawing port 224, a wire drawing fixing port 225 penetrating through the support fixing plate 223 in the axial direction is disposed on the support fixing plate 223, and a wire drawing passage for extending the wire drawing 111 to the outside of the handle case 202 is formed between the wire drawing fixing port 225 and the wire drawing port 224. The pull wire 111 passes through the pull wire fixing port 225 and the pull wire port 224 to the outside of the handle housing 202, and the pull wire 111 is limited by the pull wire fixing port 225 and the pull wire port 224 at the corner extending out of the handle housing 202.

In addition, the rear end of the handle housing 202 is further provided with a generator connecting part 226, the support fixing disc 223 is positioned between the generator connecting part 226 and the catheter pushing member 204, the support fixing disc 223 is provided with an electrode lead through hole 217 which penetrates along the axial direction, and the electrode lead through hole 217 is used for enabling the electrode lead 116 to pass through and extend to the generator connecting part 226. A generator connection 226 for mounting an electrode generator, the electrode lead 116 connecting the electrode generator to the electrode 104.

According to the ablation electrode catheter assembly, the ablation electrode head 101 is better attached to the tissues at the pulmonary vein opening through the design of the shape of the ablation electrode head 101; the position of the ablation electrode head 101 can be adjusted by the design of the pull wire 111 and the rebound spring 112; through a series of designs of the catheter handle 200, the catheter handle 200 can be made to better grip the ablation electrode catheter 100 and better position the pull wire 111, the electrode lead 116 within the catheter handle 200.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (12)

1. A catheter holding structure for mounting an ablation electrode catheter, the catheter holding structure comprising:

the catheter clamping piece comprises a first connecting pipe and a plurality of clamping pieces arranged on the end face of the first connecting pipe, and a first insertion hole is formed in the middle of each clamping piece;

the catheter pushing piece is provided with a first connecting hole in the end face, and the first connecting pipe is inserted into the first connecting hole;

the catheter pushing part comprises a pushing part head, the pushing part head is sleeved at the end of the catheter pushing part and surrounds the catheter clamping part, a second insertion hole communicated with the first insertion hole is formed in the pushing part head, and the second insertion hole and the first insertion hole are used for accommodating the ablation electrode catheter.

2. The conduit gripping structure of claim 1, wherein the free end of the gripping tab remote from the first conduit forms an angled surface that is at an acute angle to the axis of the first conduit; the inner circumferential surface of the head of the pushing piece is provided with a matching surface which is contacted with the inclined surface.

3. The conduit gripping structure of claim 2, wherein the gripping tab flares outwardly away from the outer peripheral surface of the free end of the first conduit to form a flared surface that intersects the angled surface.

4. A conduit gripping structure according to claim 3, wherein the angle α =15 ° to 60 ° between the flared surface and the axis of the first conduit, and the angle β =50 ° to 90 ° between the plane of extension of the flared surface and the inclined surface, α < β.

5. A catheter handle, comprising:

a conduit gripping structure as defined in any one of claims 1 to 4;

the handle shell is internally provided with a second connecting hole, a catheter pushing piece of the catheter clamping structure is inserted into the second connecting hole, and the first connecting hole and the second connecting hole form a channel for a pull wire and an electrode lead to pass through.

6. The catheter handle of claim 5, wherein the outer circumferential surface of the catheter pusher defines at least one groove disposed circumferentially around the catheter pusher; the catheter handle further comprises at least one rubber ring, the rubber ring is mounted in the groove, and the rubber ring is in contact with the inner circumferential surface of the second connecting hole.

7. The catheter handle of claim 5, wherein the outer circumferential surface of the catheter pusher forms a limiting groove extending in a direction parallel to the axial direction of the catheter pusher; a limiting hole is formed in the handle shell and penetrates through the inner peripheral surface of the second connecting hole; the catheter handle further comprises a limiting pin, and the limiting pin can penetrate through the limiting hole to be inserted into the limiting groove.

8. The catheter handle of claim 7, wherein the outer circumferential surface of the catheter pusher defines a first groove and a second groove, the first groove and the second groove are circumferentially disposed around the catheter pusher, and the retaining groove is located between the first groove and the second groove; the catheter handle further comprises a first sealing ring and a second sealing ring, the first sealing ring is installed in the first groove, the second sealing ring is installed in the second groove, and the first sealing ring and the second sealing ring are in contact with the inner circumferential surface of the second connecting hole.

9. The catheter handle of claim 5 wherein an end of the first connection bore distal from the catheter chuck forms an outer flare, the outer flare having a diameter that increases in a direction distal from the catheter chuck.

10. The catheter handle of claim 5, wherein the handle housing further comprises a wire port penetrating to an inner peripheral surface of the second connection hole; the catheter handle further comprises a supporting fixing disc, the supporting fixing disc is fixed in the second connecting hole, the supporting fixing disc surrounds the wire pulling port, a wire pulling fixing port penetrating through the supporting fixing disc along the axial direction is formed in the supporting fixing disc, and a wire pulling channel enabling the wire pulling to stretch out of the handle shell is formed between the wire pulling fixing port and the wire pulling port.

11. The catheter handle of claim 10 wherein the rear end of the handle housing further comprises a generator connector, the support retaining disk is positioned between the generator connector and the catheter pusher, the support retaining disk comprises an axially extending electrode wire aperture for passage of an electrode wire therethrough and extending to the generator connector.

12. An ablation electrode catheter assembly, comprising:

an ablation electrode catheter is arranged on the base plate,

a catheter handle as claimed in any one of claims 5 to 11, the ablation electrode catheter being inserted into the second insertion hole, the first insertion hole.

Images