CN218684417U - Fixing member and medical catheter - Google Patents

Abstract

The utility model provides a fixing piece and a medical catheter, wherein the fixing piece is used for fixing an electrode assembly at a far end, the electrode assembly comprises a plurality of branches, and the fixing piece is provided with a through hole unit; the through hole units comprise two rows of through holes which are arranged along a first direction, and each through hole is formed along the axial direction of the fixing piece and used for fixing each branch; the fixing piece comprises at least two splicing structures. The utility model provides a mounting and medical catheter because the mounting adopts mosaic structure to arrange the design through special through-hole, can arrange a plurality ofly in a flexible way branch fixes it.

Description

Fixing member and medical catheter

Technical Field

The utility model relates to the field of medical technology, in particular to mounting and medical catheter.

Background

Atrial fibrillation (commonly known as atrial fibrillation) is one of the most common arrhythmia diseases in clinic and is a serious challenge in the field of cardiovascular diseases in the 21 st century in the world. About 1000 million people in China are suffering from the disease, and the quality of life is seriously affected. Catheter ablation therapy is one of the effective means for curing atrial fibrillation at present. The mapping catheter is an important tool for doctors to track disease sources and make ablation schemes. In order to achieve efficient and rapid mapping, various high-density mapping catheters have been proposed in the prior art, and are characterized in that most of the distal end of the catheter has multiple electrode branches, and the multiple electrode branches occupy more space on the catheter compared with the conventional single branch, while the overall size of the interventional catheter cannot be too large, so how to reasonably design the distal end fixing structure of the catheter, so that more electrode branches can be arranged, and how to reserve a certain space for a perfusion channel, thereby improving the perfusion effect, and becoming a difficult problem to be solved urgently in the industry.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a mounting and medical catheter to solve one or more problems among the prior art.

In order to solve the above problems, the present invention provides a fixing member for fixing an electrode assembly to a distal end thereof, the electrode assembly including a plurality of branches, wherein the fixing member has a through-hole unit;

the through hole unit comprises a first through hole group and a second through hole group, the first through hole group and the second through hole group are respectively arranged along a first direction, and each through hole of the first through hole and each through hole of the second through hole are arranged along the axial direction of the fixing piece and are used for fixing each branch;

the fixing piece comprises at least two splicing structures.

Optionally, in the fixing member, the first through hole group and the second through hole group are distributed on two sides of the longitudinal section where the axis of the fixing member is located, and the first through hole group and/or the second through hole group are formed by transversely splicing at least two of the splicing structures.

Optionally, in the fixing member, the number of the first through hole groups is not less than the number of the second through hole groups, and at least each through hole of the first through hole group is formed by transversely splicing at least two splicing structures.

Optionally, in the fixing member, at least one of the through holes in the first through hole group and/or the second through hole group has an interference structure for preventing the branch from moving to the proximal end and/or the distal end of the fixing member.

Optionally, in the fixing member, a proximal end aperture of each through hole of the first through hole group or the second through hole group is smaller than a distal end aperture; or,

the near-end aperture of one part of through holes in the first through hole group or the second through hole group is smaller than the far-end aperture, and the near-end aperture of the other part of through holes is larger than the far-end aperture; or,

the surface that mosaic structure is used for the concatenation has the draw-in groove, the draw-in groove is followed first direction with an at least through-hole intercommunication of first through-hole group, the draw-in groove is used for the joint the lateral protrusion of branch.

Optionally, in the fixing member, the second through-hole group includes two through-holes, and the first through-hole group includes two through-holes or four through-holes.

Optionally, in the fixing member, the fixing member further has an infusion channel, the infusion channel includes a main channel and two branch channels communicated with the main channel, one of the branch channels includes a transverse branch extending along a second direction, so that outlets of the two branch channels are located on two sides of the through hole unit along the second direction, and the second direction intersects with the first direction; wherein the transverse branches are formed by transversely splicing at least two splicing structures.

Optionally, in the fixing member, the second direction is perpendicular to the first direction.

Optionally, the mounting in, the mounting include base and lid, the through-hole unit with fill the passageway and all locate the base, just the base has towards the convex bulge in the distal end of mounting, the through-hole unit set up in the bulge, the lid centers on the bulge lid fits the base forms two holding chambeies, two the holding chamber respectively with two the export intercommunication of branch's passageway, the lid has a plurality of filling holes that run through the setting, filling hole site in two the top in holding chamber and with the holding chamber is linked together.

Optionally, in the fixing member, the pouring hole is inclined from the proximal end to the distal end in a direction close to the central axis of the cover.

Optionally, in the fixing member, the plurality of filling holes at the top of each accommodating cavity are sequentially arranged along the first direction.

Optionally, in the fixing member, the fixing member is a metal member for ablation; or, the fixing piece is a high polymer material piece and is provided with an annular concave part arranged along the circumferential direction and an annular ablation electrode arranged on the concave part.

The utility model also provides a medical catheter, medical catheter includes pipe body, electrode subassembly and as above arbitrary the mounting, the mounting be used for with electrode subassembly is fixed in the distal end of pipe body, electrode subassembly includes a plurality of branches, and is a plurality of branch one-to-one is worn to locate in the through-hole of mounting.

Optionally, in the medical catheter, at least one branch has a diameter-variable structure and a clamping structure, the diameter-variable structure is fixed in the through hole of the fixing member, and the clamping structure is clamped with the fixing member at the orifice of the through hole of the fixing member; or,

at least two branches are provided with reducing structures and fixed in the through holes of the fixing pieces, and the reducing directions are opposite; in the still further alternative,

at least one branch has horizontal protruding portion, the surface that mosaic structure is used for the concatenation have along first direction with the draw-in groove of the through-hole intercommunication of mounting, horizontal protruding portion joint in the draw-in groove.

In summary, the present invention provides a fixing member and a medical catheter, the medical catheter includes a catheter body, an electrode assembly and the fixing member, the fixing member is used for fixing the electrode assembly at a distal end, the electrode assembly includes a plurality of branches, and the fixing member has a through hole unit; the through hole unit comprises two rows of through holes distributed along a first direction, and each through hole is formed along the axial direction of the fixing piece and used for fixing each branch; the fixing piece comprises at least two splicing structures. The utility model provides a mounting and medical catheter because the mounting adopts mosaic structure to arrange the design through special through-hole, can arrange a plurality ofly in a flexible way branch fixes it.

Drawings

Fig. 1 is a schematic view of the distribution of the through holes and the perfusion channels of the fixing member at the distal end according to the embodiment of the present invention;

FIG. 2 is a schematic diagram of the distribution of the through holes and the filling channels of the fixing member at the proximal end according to the embodiment of the present invention;

fig. 3 isbase:Sub>A longitudinal sectional view of the fixing member of the embodiment of the present invention alongbase:Sub>A directionbase:Sub>A-base:Sub>A in fig. 1;

fig. 4 is a perspective structural view of a fixing member according to a first embodiment of the present invention;

fig. 5 is a three-dimensional structure diagram of a first splicing structure in the first embodiment of the present invention;

fig. 6 is a perspective structure view of a second splicing structure in the first embodiment of the present invention;

fig. 7a to 7c are schematic views illustrating the installation of the electrode assembly in the fixing member according to the embodiment of the present invention;

fig. 8 is a perspective structural view of a fixing member sleeved with a magnetic electrode according to an embodiment of the present invention;

fig. 9 is a schematic structural view of a medical catheter according to an embodiment of the present invention;

fig. 10 is a perspective view of a cover in a second embodiment of the present invention;

fig. 11 is a perspective structural view of a fixing member according to a second embodiment of the present invention;

fig. 12a is a perspective structural view of a first splicing structure in a second embodiment of the present invention;

fig. 12b is a side view of the first splice structure according to the second embodiment of the present invention;

fig. 13a is a perspective view of a second splicing structure according to a second embodiment of the present invention;

fig. 13b is a side view of a second splice structure according to a second embodiment of the present invention;

fig. 14 is a longitudinal sectional view of a fixing member according to a second embodiment of the present invention;

fig. 15 is a longitudinal sectional view of another fixing member according to the second embodiment of the present invention;

wherein the reference numerals are as follows:

1-an electrode assembly; 2-a transition section; 3-bendable section; 4-a body section; 5-a handle; 6, fixing parts;

61-a first mosaic structure; 62-a second mosaic structure; 63-a magnetic electrode;

10-a first group of through holes; 20-a second set of through holes; 30-a first branching channel; 40-a second branching channel; 50-trunk channel; 60-a perfusion hole; 70-a containing cavity; 80-a card slot;

401-transverse branch; 402-longitudinal branch;

611-convex column; 612-a groove;

21-a lateral projection;

6 a-a base; 6 b-cover.

Detailed Description

The present invention is directed to a fixing member for fixing an electrode assembly to a distal end of a catheter body and a medical catheter including the same, and will be described in further detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently. It should be further understood that the terms "first," "second," "third," and the like in the description are used for distinguishing between various components, elements, steps, and the like, and not for describing a sequential or chronological relationship between the various components, elements, steps, and the like, unless otherwise specified or indicated, and thus the features defined as "first," "second," and "third" may explicitly or implicitly include one or at least two of the features.

In this document, "proximal" and "distal" are relative orientations, relative positions, directions of elements or actions with respect to each other from the perspective of a physician using the medical device, although "proximal" and "distal" are not limiting, but "proximal" generally refers to the end of the medical device that is closer to the physician during normal operation, and "distal" generally refers to the end that is first introduced into the patient.

[ EXAMPLES one ]

The present embodiment provides a fixing member 6, and the fixing member 6 has a through hole unit. The fixing member 6 can be applied to a catheter shown in fig. 9 for fixing the distal electrode assembly 1.

Referring to fig. 1 and fig. 2, the through-hole unit includes a first through-hole group 10 and a second through-hole group 20, where the first through-hole group 10 and the second through-hole group 20 are respectively arranged along a first direction and distributed on two sides of a longitudinal section where the axis of the fixing member is located, that is, on the distal end surface of the fixing member 6, the second through-hole group 20 and the first through-hole group 10 are distributed in parallel on two sides of a radial line. The through holes of the first and second sets of through holes 10, 20 are opened in the axial direction of the fixture to allow the branches (a, b, c, d, e, f shown in fig. 1) of the electrode assembly to pass through, thereby fixing the electrode assembly to the distal end thereof. Referring to fig. 3 in conjunction with fig. 1 and 2, the fixing member 6 further has an irrigation channel, the irrigation channel includes a main channel 50 and two branch channels communicating with the main channel 50, the two branch channels are a first branch channel 30 and a second branch channel 40, respectively, wherein the second branch channel 40 includes a transverse branch 401 extending along a second direction, so that the outlet of the first branch channel 30 and the outlet of the second branch channel 40 are located on two sides of the through hole unit along the second direction, the second direction intersects with the first direction, and preferably, the second direction is perpendicular to the first direction, so that the outlet of one branch channel is located on a side of the second through hole group 20 and a side of the first through hole group 10 away from each other. Wherein the transverse branches are formed by transversely splicing at least two of the splicing structures. In particular, the main channel 50 may be arranged in the axial direction of the fixture to facilitate the insertion of the brine line, the first branch channel 30 may be located in the extension direction of the main channel 50, i.e. also in the axial direction of the fixture, and the second branch channel 40 comprises two branches, one of which is the transverse branch 401 and the other of which is the longitudinal branch 402, i.e. also in the axial direction of the fixture. It will be appreciated that the direction of extension of the first branch channel 30 and the longitudinal branch 402 may also be angled with respect to the axial direction of the fixture, as long as the outlet of the first branch channel 30 and the outlet of the other branch of the second branch channel 40 are located on the distal face of the fixture and on either side of the through-hole unit in the second direction.

The existing catheter generally only carries out unilateral saline infusion, because when adopting bilateral saline infusion, two saline tubes are required to be introduced, so the catheter is required to have a larger diameter, the larger the diameter of the catheter is, the larger the diameter of the catheter needs to be matched with a sheath tube for operation during clinical use, larger wound is brought to the body of a patient, and in addition, if two saline tubes are introduced, two saline infusion instruments need to be matched, so the cost is higher, and the operation is inconvenient. The embodiment provides the pouring channel of mounting adopts the integrated design of a trunk passageway and two branch passageways, and one of them branch passageway includes horizontal branch road, and this horizontal branch road forms through horizontal concatenation, so for let in a salt water pipe from trunk passageway, salt water can flow to two branch passageways, reaches the purpose that carries out two side pours into, thereby under the condition that does not increase the pipe diameter, improves and pours the effect.

In this embodiment, it is preferable that the first through hole group 10 and/or the second through hole group 20 are formed by transversely splicing at least two splicing structures. When the through holes of the first through hole group 10 and/or the second through hole group 20 are formed by splicing, the branches of the electrode assembly can be directly placed in the space (for example, half of the through hole, or 2/3 of the through hole, etc.) where the through hole is to be formed in one of the splicing structures, and then the other splicing structure is spliced to form a complete through hole, and the branches of the electrode assembly are fixed without sequentially penetrating from the far end of the fixing member and then penetrating from the near end, so that the through hole can be provided with a smaller aperture. If the branches of the electrode assembly are fixed to the fixing member in a manner of penetrating in from the distal end of the fixing member and penetrating out from the proximal end, a larger aperture needs to be set, and then more glue needs to be injected into the through hole (too much glue amount may cause blockage of an injection channel due to overflow) to prevent the branches from moving transversely or longitudinally in the through hole.

That is, the fixing member provided in this embodiment adopts a splicing structure, which can be convenient for dividing the perfusion channel into two parts to realize bilateral perfusion, and on the other hand, is helpful for fixing the electrode assembly.

Further preferably, at least one of the first through hole group 10 and the second through hole group 20 having a larger number of through holes is formed by transverse splicing, and if the number of through holes of the first through hole group 10 is the same as that of through holes of the second through hole group 20, at least one of the through holes of the first through hole group and the second through hole group is formed by transverse splicing. In this embodiment, specifically, the number of the first through hole groups 10 is not less than the number of the second through hole groups 20, and at least each through hole of the first through hole group 10 is formed by transversely splicing at least two splicing structures.

Further preferably, referring to fig. 4 in combination with fig. 5 and 6, the fixing member includes two splicing structures, which are a first splicing structure 61 and a second splicing structure 62, respectively, and the first splicing structure 61 and the second splicing structure 62 are of asymmetric design, wherein the first splicing structure 61 includes a half of each through hole in the first through hole group 10, the longitudinal branch 402 and a section of the transverse branch 401 of the second branch channel 40, and the second splicing structure 62 includes the second through hole group 20, the other half of each through hole in the first through hole group 10, the trunk channel 50, the first branch channel 30 and another section of the transverse branch 401. When the two splicing structures are transversely spliced, the complete transverse branch 401 is formed, and the complete first through hole set 10 is also formed, and on the distal end face of the fixing member 6, the second through hole set 20 and the first through hole set 10 are distributed in parallel on both sides of a radial line.

The first splicing structure 61 and the second splicing structure 62 can be respectively provided with a limiting structure, for example, as shown in fig. 5, a convex pillar 611 can be arranged on one side of the first splicing structure 61 for splicing, a groove 612 can be arranged on one side of the second splicing structure 62 for splicing, and when the convex pillar 611 is embedded in the groove 612, the relative positions of the first splicing structure 61 and the second splicing structure 62 can be fixed.

In other embodiments, the fixing member may also include three or more splicing structures, for example, the fixing member 6 includes three splicing structures that are transversely spliced in sequence, the middle splicing structure includes half of the through holes of the first through hole group 10 and the second through hole group 20, the two outer splicing structures include the other half of the through holes of the first through hole group 10 and the second through hole group 20, and the three splicing structures form the complete fixing member 6 after transverse splicing. Although all branches of the electrode assembly can be fixed through the splicing type through holes by the aid of the three splicing structures, connection stability is improved, splicing difficulty is improved, and die sinking cost is increased. Also, in the case of the electrode assembly, generally, the distal ends of the branches are fixedly connected, and after a part of the branches are fixedly connected to the fixing member 6 through the first through-hole group 10, the branches fixed through the second through-hole group 20 can also be maintained relatively fixed to the fixing member 6 to some extent, and only a small amount of glue needs to be injected for further fixing. Therefore, in this embodiment, the fixing member 6 may be spliced by two asymmetric splicing structures.

Although the spliced through hole is adopted, the through hole can have a smaller diameter, and the relative fixation between the electrode assembly and the fixing piece 6 can be realized without injecting more glue, the problem that the branch of the electrode assembly moves along the axial direction of the catheter to influence the mapping accuracy can still exist in the use process of the catheter. In view of this, please refer to fig. 5 and fig. 6, in this embodiment, it is further preferable that the first through hole set 10 and/or the second through hole set 20 have an interference structure for preventing the branch from moving to the proximal end and/or the distal end of the fixing member. Specifically, taking the first through hole group 10 as an example, each through hole adopts a variable diameter design. Each through hole of the first through hole group 10 adopts a variable diameter design, the first splicing structure 61 and the second splicing structure 62 each comprise a through hole large aperture part 101 and a through hole small aperture part 102, both of which can form a step 103 due to the aperture difference, and the step 103 can prevent the branch of the electrode assembly from moving towards the small aperture through hole. At this time, the interference structure includes the step 103.

In one embodiment, as shown in fig. 7a, since the first through hole group 10 is a split through hole, since the branches of the electrode assembly with variable diameter design can be matched, specifically, the distal end aperture of each through hole of the first through hole group 10 is larger than the proximal end aperture, that is, each through hole of the first through hole group 10 has, from the distal end to the proximal end, a first aperture provided in the large aperture portion 101 of the through hole and a second aperture provided in the small aperture portion 102 of the through hole, the second aperture is smaller than the first aperture, so that when the branches of the electrode assembly also have a variable diameter structure, which is first thick and then thin from the distal end to the proximal end and matches the corresponding aperture of the through hole of the first through hole group 10, the step 103 can prevent the branches of the electrode assembly from moving from the distal end to the proximal end, and the branches of the electrode assembly can also have a snap structure, which can be snapped into the aperture of the small aperture portion 102 of the through hole, since the size of the snap portion of the branches of the electrode assembly located outside the proximal end of the fixing member 6 is larger than the second aperture, the second aperture can be easily adopted for the purpose of the split through hole 6.

In another embodiment, the distal aperture of a portion of the through holes of the first through hole set 10 is larger than the proximal aperture, and the proximal aperture of another portion of the through holes of the first through hole set 10 is larger than the distal aperture. As shown in fig. 7b, the distal apertures of two through holes may be larger than the proximal apertures, and the proximal apertures of the other two through holes may be larger than the distal apertures, when the electrode assembly branches are also of variable diameter design and respectively matched with the apertures of the corresponding through holes, based on the above-mentioned principle, part of the branches of the electrode assembly are restricted from moving towards the proximal end, and the other part of the branches are restricted from moving towards the distal end, and since the distal ends of the branches are relatively fixed, the movement of the whole electrode assembly in the axial direction is restricted. Specifically, two of the at least 4 branches fitted to the electrode assembly of this embodiment decrease in size from the distal end to the proximal end, and the other two decrease in size from the proximal end to the distal end, i.e., in opposite directions. In this embodiment, the first through hole group 10 is taken as an example, in other embodiments, the second through hole group may also be taken as an example, and the diameter changing direction of the electrode assembly branch matched with the second through hole group is opposite to the diameter changing direction of the electrode assembly branch matched with the first through hole group, so that when the distal ends of all the electrode assembly branches are connected, the electrode assembly branches can be fixed to prevent the electrode assembly branches from moving towards the proximal end or the distal end.

In addition, as shown in fig. 7c, it is also possible to limit the axial displacement of the electrode assembly by providing a clamping groove, specifically, the surface of the splicing structure for splicing has a clamping groove 80, the clamping groove 80 is communicated with at least one through hole of the first through hole group along the first direction, the branches of the electrode assembly branches have lateral protrusions 21, and the clamping groove 80 is used for clamping the branched lateral protrusions 21. In this embodiment, the through hole may not be of a variable diameter design, but may of course be of a variable diameter design. The number of the card slots 80 may be one or more, and when the number of the card slots 80 is one, the axial movement of at least one branch can be limited, and the axial movement of the branch can be limited, so that the movement of the other branches can be limited. At this time, the interference structure includes the step 103 and the catching groove 80. In addition, as shown in fig. 7c, the lateral protrusions 21 of two adjacent branches may be located in the same slot 80 one above the other, or the lateral protrusions 21 of each branch may be located in different slots 80, which is not limited in the present application.

In this embodiment, optionally, the second through-hole group 20 includes two through-holes, and the first through-hole group 10 includes two through-holes or four through-holes. Preferably, the second through hole group 20 includes two through holes, and the first through hole group 10 includes four through holes, so that the first through hole group 10 and the second through hole group 20 can fix six branches of the electrode assembly, thereby ensuring the electrode density and satisfying the limitation of the existing catheter on the tube diameter. Further preferably, the two middle through holes of the first through hole group 10 and the two through holes of the second through hole group 20 are distributed in a rectangular shape to reduce the distance between the through holes as much as possible, thereby reducing the transverse dimension of the distal end of the catheter, and further making the distal end more easily furlable when the catheter passes through sheath tubes with the same diameter.

In addition, in the present embodiment, the fixing member 6 may be a metal member, for example, made of a noble metal, and used as an ablation electrode in actual operation; or, the fixing member 6 is made of a polymer material, and as shown in fig. 8, the fixing member 6 has annular concave portions 63 distributed along the circumferential direction, and is used for sleeving the ablation electrode, so that the outer surface of the ablation electrode is flush with the outer surface of the fixing member 6.

The embodiment also provides a medical catheter, which comprises a catheter body, an electrode assembly and the fixing part 6, wherein the fixing part 6 is used for fixing the electrode assembly 1 at the far end of the catheter body, the electrode assembly 1 comprises a plurality of branches, and the plurality of branches are correspondingly arranged in the through hole of the fixing part 6 in a one-to-one mode.

With reference to the above embodiment, the branch has a diameter-variable structure and a clamping structure, the diameter-variable structure is fixed in the through hole of the fixing element 6 (i.e. the part of the branch located in the through hole of the fixing element is first thick and then thin), and the clamping structure is clamped with the fixing element at the orifice of the through hole of the fixing element 6; or, at least two branches have variable diameter structures, and are fixed in the through hole of the fixing member 6, and the variable diameter directions are opposite (that is, the part of one branch located in the through hole of the fixing member 6 is first thick and then thin, and the part of the other branch located in the through hole of the fixing member 6 is first thin and then thick); or, the branch has a transverse protrusion 21, the surface of the splicing structure for splicing has a slot 80 communicated with the through hole of the fixing member along the first direction, the slot protrusion 21 is clamped in the slot 80, and at this time, the branch is not required to adopt a reducing design.

In this embodiment, as shown in fig. 9, the catheter body comprises a transition section 2, a bendable section 3 and a main body section 4 which are connected in sequence from the distal end to the proximal end. The electrode assembly 1, the fixing member 6, the transition section 2 and the bendable section 3 can be connected through glue in sequence, and the bendable section 3 and the main body section 4 can be connected through a high-frequency welding mode.

The transition section 2 adopts a single-lumen tube, and the material of the single-lumen tube 202 can be a high polymer material, such as nylon elastomer (pebax) or Polyetheretherketone (PEEK). The bendable section 3 is a multi-cavity tube section, preferably 4 cavities, wherein one cavity can be used for saline passing tube, one cavity is used as a guide wire cavity, and two symmetrical cavities are used as pull wire cavities for pulling wires. The main body section 4 is a slender tube body containing weaving wires and is used for butt joint of the multi-cavity tube section and the handle, and the weaving wires have the functions of supporting the tube body, preventing deformation, enabling the torque of the catheter to be transmitted in equal proportion and the like.

The catheter body further comprises a handle 5, and a tail wire socket is arranged at the near end of the handle 5 and connected with each conducting wire in the catheter. The main body section 4 can be connected with the handle 5 through a knob of the handle 5, the knob of the handle 5 is connected with the bendable section 3 through a pull wire and used for controlling the bending of the bendable section 3, or a bending control part is arranged on the side wall of the handle 5 and connected with the bendable section 3 through the pull wire and used for controlling the bending of the bendable section 3.

In this embodiment, the electrode assembly may comprise a plurality of ring members, each ring member having two limbs, each limb extending through a respective through hole in the fixing member 6 and being secured proximally to the transition piece 2. Each of the loop members may include an arc connecting the two branches in addition to the two branches, and the arc of all the loop members may be fixedly connected by a connecting block or a bundle, etc.

When the second through hole group is provided with two through holes, and the first through hole group is provided with four through holes, the number of the ring members is three, wherein two branches of one ring member are correspondingly arranged in the two through holes of the second through hole group; the two branches of the other two ring members are respectively arranged corresponding to the four through holes of the first through hole group and can be alternately arranged, or the two branches of one ring member are positioned between the two branches of the other ring member.

[ EXAMPLE II ]

The second embodiment is similar to the first embodiment, and only the differences will be described below.

In the present embodiment, referring to fig. 10 and 11, the fixing member 6 includes a base 6a and a cover 6b, and the through hole unit and the perfusion channel are both disposed on the base 6a, that is, the base 6a includes the first splicing structure 61 and the second splicing structure 62, and after the base 6a is spliced, the cover 6b is covered on the base 6a to form the fixing member.

In addition, referring to fig. 12a, 12b, 13a and 13b in combination with fig. 14, the base 6a has a protruding portion protruding toward the distal end of the fixing member, and the through-hole unit is disposed at the protruding portion. The cover body 6b covers the base 6a around the protruding portion to form two accommodating cavities 70, the two accommodating cavities 70 are respectively communicated with the outlets of the two branch channels, the cover body 6b is provided with a plurality of filling holes which are arranged in a penetrating mode, and the filling holes are located at the tops of the two accommodating cavities 70 and are communicated with the accommodating cavities. The design of the double-side accommodating cavity 70 and the multiple perfusion holes 60 can improve the perfusion density and flow rate, thereby more effectively avoiding the problem of easy thrombus formation caused by high-density electrode arrangement.

Specifically, as shown in fig. 10 and 14, the cover body is designed to have a double-layer side wall, the inner layer side wall of the cover body 6b has a shape and size matching those of the protruding portion of the base 6a, and the outer layer side wall of the cover body 6b has an inner diameter matching the outer diameter of the non-protruding portion of the base 6 a. The inner side wall of the cover body 6b is equivalent to a partition plate, so that the phenomenon that the lead is soaked in the perfusate due to overflow of the perfusate can be avoided, the outer side wall of the cover body 6b plays a role in connection with the base 6a, glue can be dispensed on the circumferential surface of the non-protruding part of the base 6a, and when the cover body 6b covers the base 6a, the outer side wall of the cover body 6b is fixedly connected to the base 6a through glue, or threads can be arranged on the outer surface of the non-protruding part of the base 6a and the inner surface of the outer side wall of the cover body 6b, and when the cover body 6b covers the base 6a, the threads are fixedly connected in a threaded connection mode. After the cover 6b is covered on the base 6a, the inner space formed by the two side walls and the top wall of the cover 6b and the distal end surface of the non-protruding part together form the accommodating cavity 70, and the saline flowing out from the branch channel fills the accommodating cavity 70 and is then sprayed to each branch of the electrode assembly through the filling hole 60.

It is further preferable that each of the pouring holes 60 is inclined from the proximal end to the distal end toward the direction close to the central axis of the lid body 6b as shown in fig. 15, so that the saline can reach the branch roots more intensively, and the thrombus can be prevented more effectively.

It is further preferred, every a plurality of the filling hole 60 at holding 70 top is followed first direction arranges in proper order to match the setting of through-hole, promptly, to each group through-hole, all have with its parallel arrangement the filling hole group to its salt solution that spouts to the branch that sets up in every through-hole can be arrived smoothly to salt solution.

In summary, the embodiment of the present invention provides a fixing member and a medical catheter, the medical catheter includes a catheter body, an electrode assembly and the fixing member, the fixing member is used for fixing the electrode assembly at a distal end, the electrode assembly includes a plurality of branches, and the fixing member has a through hole unit; the through hole group comprises two rows of through holes which are distributed along a first direction and distributed on two sides of the axial surface of the fixing piece, and each through hole is formed along the axial direction of the fixing piece and used for fixing each branch; the fixing piece comprises at least two splicing structures. The utility model provides a mounting and medical catheter because the mounting adopts mosaic structure to arrange the design through special through-hole, can arrange a plurality ofly in a flexible way branch fixes it.

It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on the difference from the other embodiments, the same and similar parts between the embodiments may be referred to each other, and in addition, different parts between the embodiments may also be used in combination with each other, which is not limited by the present invention. For example, although the first embodiment of the present disclosure describes a specific arrangement of the through hole groups, it can be understood by those skilled in the art that, as long as the fixing member adopts a splicing structure, bilateral perfusion can be achieved through the divided transverse branches, so that saline can flow to the two branch passages by introducing a saline pipe from the main passage, thereby achieving the purpose of bilateral perfusion, and improving perfusion effect without increasing the diameter of the catheter; when the first through-hole set 10 and/or the second through-hole set 20 are formed by transversely splicing the splicing structures, the branches of the electrode assembly may be fixed by any one of the structures of fig. 7a to 7c to prevent the branches from moving to the proximal end or the distal end of the catheter, and thus in other embodiments, the first through-hole set and the second through-hole set may be distributed at the distal end of the fixing member in other manners. The utility model discloses do not limit to this.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all within the scope of the claims.

Claims (14)

1. A fixture for holding an electrode assembly at a distal end thereof, the electrode assembly including a plurality of branches, characterized in that the fixture has a through-hole unit;

the through hole unit comprises a first through hole group and a second through hole group, the first through hole group and the second through hole group are respectively arranged along a first direction, and each through hole of the first through hole and each through hole of the second through hole are arranged along the axial direction of the fixing piece and are used for fixing each branch;

the fixing piece comprises at least two splicing structures.

2. The fastener of claim 1, wherein the first set of through holes and the second set of through holes are distributed on both sides of a longitudinal section of the fastener where the axis is located, and the first set of through holes and/or the second set of through holes are formed by transversely splicing at least two of the splicing structures.

3. The fixture according to claim 2, wherein the number of the first through-hole groups is not less than the number of the second through-hole groups, and at least each through-hole of the first through-hole groups is formed by transversely splicing at least two of the splice structures.

4. A fixing as claimed in claim 2, wherein at least one of the through holes in the first and/or second set of through holes has an interference formation for preventing movement of the limbs towards the proximal and/or distal end of the fixing.

5. The fixture according to claim 4, wherein the proximal aperture of each through-hole of the first or second set of through-holes is smaller than the distal aperture; or,

the near-end aperture of one part of through holes in the first through hole group or the second through hole group is smaller than the far-end aperture, and the near-end aperture of the other part of through holes is larger than the far-end aperture; or,

the surface that mosaic structure is used for the concatenation has the draw-in groove, the draw-in groove is followed first direction with an at least through-hole intercommunication of first through-hole group, the draw-in groove is used for the joint the lateral protrusion of branch.

6. The fixture according to claim 4, wherein the second set of through holes comprises two of the through holes, and the first set of through holes comprises two of the through holes or four of the through holes.

7. The fixing member according to claim 1, wherein the fixing member further has an irrigation passage including a trunk passage and two branch passages communicating with the trunk passage, wherein one of the branch passages includes a lateral branch extending in a second direction such that outlets of the two branch passages are located on both sides of the through-hole unit in the second direction, the second direction intersecting the first direction; wherein the transverse branches are formed by transversely splicing at least two splicing structures.

8. The fastener of claim 7, wherein said second direction is perpendicular to said first direction.

9. The fixture according to claim 8, wherein the fixture includes a base and a cover, the through hole unit and the filling channel are both disposed on the base, and the base has a protruding portion protruding toward the distal end of the fixture, the through hole unit is disposed on the protruding portion, the cover covers the base around the protruding portion to form two receiving chambers, the two receiving chambers are respectively communicated with the outlets of the two branch channels, the cover has a plurality of filling holes penetrating therethrough, and the filling holes are located at the tops of the two receiving chambers and are communicated with the receiving chambers.

10. A fixing as claimed in claim 9, wherein the pouring aperture is inclined from proximal to distal end towards a direction close to the central axis of the cap.

11. The fixture according to claim 9, wherein a plurality of the pouring holes are sequentially arranged at the top of each of the receiving cavities along the first direction.

12. The fastener of claim 1, wherein the fastener is a metallic member for ablation; or the fixing piece is a high polymer material piece and is provided with an annular concave part arranged along the circumferential direction and an annular ablation electrode arranged on the concave part.

13. A medical catheter comprising a catheter body, an electrode assembly and a fixing member as claimed in any one of claims 1 to 10 for fixing the electrode assembly to the distal end of the catheter body, the electrode assembly comprising a plurality of branches which are arranged one-to-one in the through-holes of the fixing member.

14. The medical catheter of claim 13, wherein at least one of the branches has a diameter-varying structure fixed in the through-hole of the fixing member and a snap-fit structure that snaps with the fixing member at an orifice of the through-hole of the fixing member; or,

at least two branches are provided with reducing structures and are fixed in the through holes of the fixing pieces, and the reducing directions are opposite; in the still further alternative,

at least one branch has horizontal protruding portion, the surface that mosaic structure is used for the concatenation have along first direction with the draw-in groove of the through-hole intercommunication of mounting, horizontal protruding portion joint in the draw-in groove.

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