CN218515803U

CN218515803U - Controllable sequence bent long sheath catheter for catheter radio frequency ablation and catheter radio frequency ablation device

Info

Publication number: CN218515803U
Application number: CN202220967896.0U
Authority: CN
Inventors: 卢才义; 陈越猛
Original assignee: Shaoxing Mayo Heart Magnetism Medical Technology Co ltd
Current assignee: Shaoxing Mayo Heart Magnetism Medical Technology Co ltd
Priority date: 2022-04-25
Filing date: 2022-04-25
Publication date: 2023-02-24
Anticipated expiration: 2032-04-25

Abstract

The utility model discloses a curved long sheath pipe of controllable sequence and pipe radio frequency melt device for pipe radio frequency melts, the curved long sheath pipe of controllable sequence includes: the body part comprises a handle, a sheath tube body part, a near bend and a far bend which are connected in sequence; the far bending control piece controls the far bending and bending through the first steel wire assembly, the far bending is suitable for bending along a first direction and a second direction, the bending angles are both larger than 90 degrees, and the first direction is opposite to the second direction; the near bending control piece controls near bending and bending through the second steel wire assembly, the near bending is suitable for bending along a third direction and a fourth direction, the bending angles are both larger than 90 degrees, and the third direction is opposite to the fourth direction; the body part is sleeved with the visual electrode assembly, and the visual electrode assembly is electrically connected with the three-dimensional electrophysiological equipment through the lead assembly. The utility model discloses utilize the far bend and the nearly bend of the curved long sheath pipe of controllable sequence, can accomplish the action of buckling to the equidirectional simultaneously for the operator can the efficient operate sheath pipe reach the focus position.

Description

Controllable sequence bent long sheath catheter for catheter radio frequency ablation and catheter radio frequency ablation device

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a curved long sheath pipe of controllable sequence and pipe radio frequency melt device for pipe radio frequency melts.

Background

In the related technology, the main clinical treatment mode of minimally invasive ablation for arrhythmia is still catheter radio frequency ablation, and the basic principle is as follows: under the guidance of different perspective images, the large-head ablation catheter is sent into a heart cavity where an arrhythmia focus is located through a peripheral blood vessel, an ablation target point is determined through fine mapping, and then the focus part is ablated by adopting radio frequency energy. During this treatment, the most critical technique is to manipulate the catheter tip to reach and target the ablation site, and to maintain the ablation electrode in constant and stable contact with the endocardial myocardial tissue at the target for a sufficient period of time. To achieve this, operators often use a long sheath in conjunction with the catheter to better and faster manipulate the catheter tip to locate the target site and hold the tissue together. However, the auxiliary long sheath used clinically at present is difficult to control, and the target is difficult to locate, so that the whole operation process is long.

SUMMERY OF THE UTILITY MODEL

The utility model provides a curved long sheath pipe of controllable sequence and pipe radio frequency ablation device for pipe radio frequency ablation for solve the problem of complementary long sheath pipe location target spot difficulty among the prior art at least.

An embodiment of the first aspect of the present invention provides a controllable sequence curved long sheath for catheter rf ablation, including:

the body part comprises a handle, a sheath tube body part, a near bend and a far bend which are connected in sequence;

the far bending control piece controls the far bending to be bent through the first steel wire assembly, the far bending is suitable for being bent along a first direction and a second direction, the bending angles are larger than 90 degrees, and the first direction is opposite to the second direction;

the near bending control piece controls the near bending through a second steel wire assembly, the near bending is suitable for bending along a third direction and a fourth direction, the bending angle is larger than 90 degrees, and the third direction is opposite to the fourth direction;

the visual electrode assembly is sleeved on the body part and is electrically connected with the three-dimensional electrophysiological equipment through the lead assembly.

According to some embodiments of the present invention, the first wire assembly, the second wire assembly, and the wire assembly are all disposed through the body portion.

According to some embodiments of the present invention, further comprising: the first micro pipe and the second micro pipe are arranged in the body part, the first steel wire component penetrates through the first micro pipe, and the second steel wire component penetrates through the second micro pipe.

According to some embodiments of the present invention, the first wire assembly comprises a first wire and a second wire, one end of the first wire is fixedly connected to the first fixing point of the far bend, and the other end of the first wire is connected to the far bend control member in a fitting manner; one end of the second steel wire is fixedly connected with a second fixing point of the far bend, the other end of the second steel wire is connected with the far bend control piece in a matched mode, and the first fixing point and the second fixing point are arranged at one end, far away from the near bend, of the far bend and are arranged in a central symmetry mode;

the second steel wire assembly comprises a third steel wire and a fourth steel wire, one end of the third steel wire is fixedly connected with a third fixing point of the near bend, and the other end of the third steel wire is connected with the near bend control piece in a matched mode; one end of the fourth steel wire is fixedly connected with a fourth fixing point of the near bend, the other end of the fourth steel wire is connected with the near bend control piece in a matched mode, and the third fixing point and the fourth fixing point are arranged at one end, close to the far bend, of the near bend and are arranged in a central symmetry mode.

According to the utility model discloses a some embodiments, the control member of far bending and nearly curved control member all overlap and locate the handle, the control member of far bending passes through rotation control far bending, nearly curved control member passes through rotation control nearly bending.

According to some embodiments of the present invention, the visualization electrode assembly includes a first visualization electrode, a second visualization electrode, and a third visualization electrode, the first visualization electrode is sleeved on the far bending part and away from the near bending part, the third visualization electrode is sleeved on the near bending part and away from the far bending part, and the second visualization electrode is sleeved on the far bending part and the near bending part.

According to some embodiments of the invention, the visualization electrode is a platinum-iridium alloy piece.

According to some embodiments of the invention, the sheath tube portion is a polyurethane tube lined with braided steel wires.

According to some embodiments of the present invention, further comprising:

the flushing pipe is arranged at the tail end of the handle and communicated with the interior of the body part, and the flushing pipe is used for sucking and flushing the inner cavity of the body part.

An embodiment of a second aspect of the present invention provides a catheter radiofrequency ablation device, including:

a conduit;

the sheath is a long sheath bent by a controllable sequence for the radio frequency ablation of the catheter, and the sheath is used for assisting the catheter to extend into an area to be ablated.

Adopt the embodiment of the utility model provides a, the curved long sheath pipe's of controllable sequence far away curved control part and nearly curved control part respectively through the far away curved and nearly curved of first steel wire assembly and second steel wire assembly control sheath pipe, can buckle to two not equidirectional for the curved long sheath pipe of controllable sequence can be suitable for different internal environments such as heart, blood vessel, is favorable to the operator in the face of complicated human organ structure, can more the curved long sheath pipe of controllable sequence of efficient operation reach the focus position.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the contents of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following description will particularly refer to specific embodiments of the present invention.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. In the drawings:

FIG. 1 is a schematic structural view of a long sheath with controllable sequential bending according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a controllable sequential curved sheath according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of an embodiment of the present invention;

fig. 4 is a schematic structural view of the combined structure of the controllable sequence bent long sheath and the dilating tube in the embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The embodiment of the first aspect of the present invention provides a long sheath with controllable sequence for rf ablation of catheter, referring to fig. 1, including:

the body part is of a hollow structure and comprises a handle 9, a sheath body part 6, a near bend 4 and a far bend 2 which are connected in sequence.

It will be appreciated that referring to figure 1, the handle 9 is connected at one end to one end of the sheath body 6, the other end of the sheath body 6 is connected to one end of the proximal bend 4 and the other end of the proximal bend 4 is connected to one end of the distal bend 2 to form a complete body. The handle 9 is used for gripping.

The far bending control piece 7 controls the far bending 2 to finish bending action through the first steel wire component.

It can be understood that the first steel wire assembly is used as a power transmission assembly, and the far bending control piece 7 is operated, so that the far bending control piece 7 can drive the far bending part 2 to complete the bending action through the transmission action of the first steel wire assembly.

The far bend 2 is suitable for bending along the first direction and the second direction, and the bendable angle is larger than 90 degrees. The first direction is opposite to the second direction. It will be appreciated that the distal bend 2 can perform the bending action in two different directions and that the angle at which the distal bend 2 can be bent in each direction can be up to 90 °.

And the near bend control part 8 controls the near bend 4 to complete the bending action through the second steel wire component.

Similarly, the second steel wire component is used as a power transmission component, and the near-bending control component 8 is operated, so that the near-bending control component 8 can drive the near-bending part 4 to complete the bending action through the transmission action of the second steel wire component.

The proximal bend 4 is adapted to bend in a third direction and a fourth direction and can be bent over an angle greater than 90 °. The third direction is opposite to the fourth direction. It will be appreciated that the proximal bend 4 can perform the bending action in two different directions and that the angle at which the proximal bend 4 can be bent in each direction can be up to 90 °.

The visual electrode assembly is sleeved on the body part. The visualization electrode assembly is electrically connected with the three-dimensional electrophysiological equipment through the lead assembly.

The visualization electrode assembly includes a plurality of visualization electrodes. The specific number of the visible electrodes can be set according to the actual operation requirement. The visualization electrode assembly can be used for presenting three-dimensional images of the controllable sequence bent long sheath tube positioned at each position in the human body and transmitting the three-dimensional images to the three-dimensional electrophysiological equipment.

In order to facilitate the reader to know the curved long sheath catheter with controllable sequence for the radio frequency ablation, the utility model discloses a use method of the curved long sheath catheter with controllable sequence, which is provided by the embodiment of the utility model, is explained in detail below by sending the curved long sheath with controllable sequence into the right ventricular outflow tract for ablation.

In the process of using the controllable sequence bent long sheath catheter to carry out the cardiac surgery, firstly, a guide wire with a certain length is sent into the body of a patient through puncture, and one end of the guide wire is sent into a heart cavity with a focus under the guide of fluoroscopy. The tip of the dilating tube shown in fig. 3 is inserted into the body of the controllable sequential bending long sheath from the handle end of the controllable sequential bending long sheath, and the tip of the dilating tube is passed out from the distal bending end of the controllable sequential bending long sheath, so as to form the controllable sequential bending long sheath/dilating tube assembly shown in fig. 4. The controllable sequence bent long sheath/expansion tube assembly is sleeved on the guide wire through the puncture point and sent into a human body, the tip of the controllable sequence bent long sheath/expansion tube assembly is sent to the middle part of the right atrium under the guidance of an image, then the handle end of the controllable sequence bent long sheath is fixed, and the expansion tube and the guide wire are withdrawn out of the human body together. And electrically connecting the controllable sequence bent long sheath with the three-dimensional electrophysiological equipment, and displaying the far bend and the near bend of the controllable sequence bent long sheath in an image of the three-dimensional electrophysiological equipment. Under the guidance of the three-dimensional image, the distal bending end of the long sheath catheter with the controllable sequence is controlled to reach 1/3 of the position on the right atrium, and the proximal bending end is bent towards the direction of the tricuspid valve, so that the distal bending end of the long sheath catheter with the controllable sequence points to the tricuspid valve. And slowly forwarding the far bent end of the controllable sequence bent long sheath to enter the right ventricular inflow channel and cross the right ventricular fornix part, adjusting the far bent end position and the bending degree of the near bend of the controllable sequence bent long sheath to enable the far bent end of the controllable sequence bent long sheath to be positioned in the middle of the inflow channel in a near-horizontal shape, and bending the far bend to enable the far bent end of the controllable sequence bent long sheath to be upwards directed to the right ventricular outflow channel. And adjusting and confirming that the far bent end of the controllable sequence bent long sheath tube is coaxial with the outflow tract of the right ventricle in a plurality of observation positions. The far bending end of the long sheath tube is sent forwards in a controllable sequence to enter the middle part of the outflow tract of the right ventricle. The ablation catheter is sent into the ablation catheter through the long sheath tube with the controllable sequence, the head end of the ablation catheter extends out of the far bent end of the long sheath tube with the controllable sequence, and the ablation catheter is operated to map, position and ablate the focus. After the ablation is finished, the catheter and the long sheath tube with the controllable sequence are taken out of the body, the puncture point is bound, and the operation is finished.

It should be noted that the above-mentioned handle end refers to the free end of the handle, i.e. the end far away from the sheath body, and the distal bending end refers to the free end of the distal bending, i.e. the end far away from the proximal bending.

By adopting the controllable sequence bent long sheath catheter in the embodiment, the flexible sheath catheter can be bent towards two different directions by utilizing the bidirectional bending function of the far bending and the near bending of the controllable sequence bent long sheath catheter, so that the flexible sheath catheter is suitable for complex in-vivo environments such as human hearts, blood vessels and the like, and an operator can effectively control operation actions by utilizing the bending and visual functions of the controllable sequence bent long sheath catheter to send the ablation catheter to a focus to complete ablation operation.

On the basis of the above-described embodiment, various modified embodiments are further proposed, and it is to be noted herein that, in order to make the description brief, only the differences from the above-described embodiment are described in the various modified embodiments.

According to some embodiments of the utility model, the curved long sheath pipe of controllable sequence of operation gets into right ventricular outflow tract can also use the mode of guiding the seal wire in the art. Keeping the leading end of the guide wire extending out of the leading end (namely the far bending end) of the controllable sequence bent long sheath catheter by 3-5cm, and bending the guide wire to the direction of the tricuspid valve to form a near bend under the guidance of the three-dimensional image, so that the leading end of the controllable sequence bent long sheath catheter points to the tricuspid valve and enters the right ventricle inflow channel. The position of the head end of the controllable sequence bent long sheath tube and the bending degree of the near bend are adjusted to be approximately horizontal and positioned in the middle of the right chamber inflow channel. The distal bend is bent, so that the head end of the long sheath catheter with controllable sequence is directed to the outflow tract of the right ventricle. The long sheath tube with the controllable sequence is fixed, and the guide wire is sent forward to enter the left or right pulmonary artery. And fixing the guide wire, and forwarding the controllable sequence bent long sheath catheter to enable the head end of the controllable sequence bent long sheath catheter to enter the middle part of the outflow tract of the right ventricle.

According to some embodiments of the present invention, the catheter can be used to manipulate the curved sheath into the right ventricular outflow tract. Keeping the head end of the catheter extending out of the head end of the long sheath catheter with the controllable sequence bending by 2-3cm, and continuously monitoring the pressure. Under the guidance of the three-dimensional image, the proximal bend of the controllable sequence bent long sheath tube is bent towards the tricuspid valve, so that the head end of the controllable sequence bent long sheath tube points to the tricuspid valve. The controlled sequence of curved sheath and catheter are advanced together with the catheter tip into the right ventricular inflow tract and across the fornix. The head end position and the bending degree of the near bending of the controllable sequence bending long sheath catheter are adjusted to be horizontally positioned in the middle of the right chamber inflow channel, and the bending degree of the head end of the catheter can be adjusted to assist when necessary. The long sheath tube is bent far by the controllable bending sequence, so that the head end of the catheter points to the outflow tract of the right ventricle. And (3) fixing a long sheath with a controllable sequence, and advancing the catheter under pressure monitoring to reach the upper pulmonary valve or the bifurcation of the left and right pulmonary arteries. And fixing the guide wire, and forwarding the controllable sequence bent long sheath catheter to enable the head end of the controllable sequence bent long sheath catheter to enter the right ventricular outflow tract.

According to some embodiments of the present invention, the wire assembly comprises a wire and a wire interface 11, one end of the wire is electrically connected to the visual electrode assembly, and the other end of the wire is connected to the wire interface 11. The lead interface 11 is used for electrically connecting with the three-dimensional electrophysiological equipment so as to transmit the image acquired by the visualization electrode to the three-dimensional electrophysiological equipment for display.

According to some embodiments of the utility model, first steel wire subassembly, second steel wire subassembly and wire assembly all wear to locate the body portion of the curved long sheath pipe of controllable sequence. Wear to locate this somatic part with above subassembly can reduce in the operation above subassembly and human organ contact, thereby avoid causing harmful effects and internal environment to the human body and probably cause the damage to above subassembly and be unfavorable for going on of operation.

According to the utility model discloses a some embodiments, the curved long sheath pipe of controllable sequence still includes: the first micro-pipe and the second micro-pipe are arranged in the body part, the first steel wire component penetrates through the first micro-pipe, and the second steel wire component penetrates through the second micro-pipe. The first steel wire component for controlling the far bending 2 and the second steel wire component for controlling the near bending 4 are respectively arranged in different microtubes, so that the problem that when the far bending 2 and the near bending 4 are controlled to do bending action, two groups of steel wire components mutually interfere with each other due to mutual friction or winding, and the bending action cannot be finished can be avoided.

According to some embodiments of the invention, the first microtube and the second microtube are disposed in a tube wall of the body portion.

According to some embodiments of the utility model, first steel wire subassembly includes first steel wire and second steel wire, refer to fig. 2 and show, the one end of first steel wire and the first fixed point 12 fixed connection of far curved 2, the other end of first steel wire and the cooperation of far curved control 7 are connected. One end of the second steel wire is fixedly connected with a second fixing point 13 of the far bend 2, and the other end of the second steel wire is connected with the far bend control piece 7 in a matching way. The far bend 2 can be bent towards one side of the first steel wire by tightening the first steel wire and loosening the second steel wire; the distal bend 2 can be bent towards one side of the second wire by pulling the second wire tight and releasing the first wire.

Further, referring to fig. 2, the first fixing point 12 and the second fixing point 13 may be both disposed at an end of the far bend 2 away from the near bend 4, and both are arranged in a central symmetry manner.

According to some embodiments of the utility model, the second steel wire subassembly includes third steel wire and fourth steel wire, refer to fig. 2 and show, the one end of third steel wire and the 14 fixed connection of the third fixed point of nearly curved 4, the other end of third steel wire and the cooperation of nearly curved controlling part 8 are connected. One end of the fourth steel wire is fixedly connected with a fourth fixing point 15 of the near bend 4, and the other end of the fourth steel wire is connected with the near bend control element 8 in a matching manner. By tensioning the third wire and releasing the fourth wire, the proximal bend 4 can be bent towards one side of the third wire; by pulling the fourth wire and releasing the first wire, the proximal bend 4 can be bent towards one side of the fourth wire.

Furthermore, the third fixing point 14 and the fourth fixing point 15 can be both arranged at one end of the proximal bend 4 close to the distal bend 2, and are arranged in a central symmetry manner.

The bending actions in different directions can be respectively and independently completed on the plane where the connecting lines of the four fixing points are located by arranging the four fixing points to enable the near bending 4 and the far bending 2.

According to some embodiments of the present invention, referring to fig. 1, the handle 9 is all sleeved with the far-bending control member 7 and the near-bending control member 8. For example, in some examples of the present invention, the far-bending control member 7 is a far-bending control wheel, and the near-bending control member 8 is a near-bending control wheel. The far bending control part 7 controls the far bending part 2 to realize bending actions and bending angles in different directions through clockwise and anticlockwise rotation, and the near bending control part 8 controls the near bending part 4 to realize bending actions and bending angles in different directions through clockwise and anticlockwise rotation.

According to some embodiments of the present invention, referring to fig. 1, the visualization electrode assembly includes a first visualization electrode 1, a second visualization electrode 3, and a third visualization electrode 5, the first visualization electrode 1 is sleeved on the end of the far bend 2 away from the near bend 4, the third visualization electrode 5 is sleeved on the end of the near bend 4 away from the far bend 2, and the second visualization electrode 3 is sleeved on the junction of the far bend 2 and the near bend 4. The visible electrodes are arranged at the ends of the far bend 2 and the near bend 4, so that the complete condition of the far bend 2 and the near bend 4 of the long sheath can be observed in vivo through the image of the three-dimensional electrophysiological equipment.

According to some embodiments of the invention, a distance between each visualization electrode in the visualization electrode assembly is less than 10cm.

According to the utility model discloses a some embodiments, be located the distance less than or equal to 10mm that the most distal visible electrode of the curved long sheath pipe of controllable sequence and the curved long sheath pipe of controllable sequence are located in the human body.

According to some embodiments of the present invention, the visualization electrode is a platinum-iridium alloy member.

According to some embodiments of the present invention, the wire connecting the visualization electrode and the three-dimensional electrophysiological equipment is disposed in the wall of the long sheath of the controllable sequence.

According to some embodiments of the present invention, the sheath tube portion 6 is a polyurethane tube lined with braided steel wires.

According to the utility model discloses a some embodiments, the length more than or equal to 65cm of sheath body portion 6, the inside and outside footpath is not less than 5F.

According to some embodiments of the utility model, the curved long sheath pipe of controllable sequence still includes:

and the flushing pipe 10 is arranged at the tail end of the handle 9 and is communicated with the interior of the body part, and the flushing pipe 10 is used for sucking and flushing the inner cavity of the body part. For example, during operation, after the controlled sequence bent sheath is delivered into the body and the dilating catheter and the guide wire are drawn out, the controlled sequence bent sheath is fully exhausted by suction through the irrigation tube 10, and then heparin saline is injected to irrigate and fill the lumen of the controlled sequence bent sheath. The irrigation tube 10 is connected with the infusion tube joint to continuously irrigate the lumen of the controllable sequence bent long sheath tube at the minimum dropping speed.

According to a second aspect of the present invention, there is provided a catheter radiofrequency ablation device, comprising:

the catheter is used for mapping, positioning and ablating a focus area.

A sheath, which is a long sheath bent according to any one of the controllable sequences for the catheter rf ablation in the embodiments of the first aspect, and is used to assist the catheter to extend into the region to be ablated, so as to improve the efficiency and precision of the ablation operation.

When using pipe radio frequency ablation device, send into the human body with the sheath pipe along the puncture point, under the guide of three-dimensional image, accomplish different directions and the angle action of buckling according to the different structures of human organ in vivo through the sheath pipe to send the head end of sheath pipe to focus department, send into the pipe through the sheath pipe again, the head end of pipe stretches out the head end of sheath pipe, and the operation pipe accomplishes melting to the focus.

The following describes the controllable sequence curved long sheath for the catheter rf ablation and the catheter rf ablation device according to the embodiment of the present invention in detail. It is to be understood that the following description is illustrative only and is not intended as a specific limitation on the invention. All adopt the utility model discloses a similar structure and similar change all should be listed into the utility model discloses a scope of protection.

In this embodiment, the catheter radiofrequency ablation device comprises:

the catheter is used for mapping, positioning and ablating a focus area.

A steerable sequence curved elongated sheath for catheter rf ablation, referring to fig. 1, comprising: a handle 9, a sheath body part 6, a near bend 4 and a far bend 2 which are connected in sequence.

One end of the handle 9 close to the sheath body 6 is provided with a far bending control wheel and a near bending control wheel, and the other end of the handle 9 is provided with a flushing pipe 10 and a lead interface 11. The irrigation tube 10 communicates with the lumen of the sheath.

A first visualization electrode 1, a third visualization electrode 5 and a second visualization electrode 3 are respectively arranged at one end of the far bend 2 far away from the near bend 4, one end of the near bend 4 far away from the far bend 2 and the connection part of the near bend 4 and the far bend 2. The conduit is arranged in the pipe wall of the sheath pipe, the three wires penetrate through the conduit, one ends of the three wires are respectively electrically connected with the three visual electrodes, and the other ends of the three wires are electrically connected with the wire interface 11.

At the end of the far bend 2 remote from the near bend 4, a first fastening point 12 and a second fastening point 13 are provided, the first fastening point 12 and the second fastening point 13 being arranged in a central symmetry with respect to each other. At one end of the proximal bend 4 close to the distal bend 2, a third fastening point 14 and a fourth fastening point 15 are arranged, and the third fastening point 14 and the fourth fastening point 15 are arranged in a central symmetry manner. The connecting line of the first fixing point 12 and the second fixing point 13 is coplanar with the connecting line of the third fixing point 14 and the fourth fixing point 15. The pipe wall of the sheath pipe is also provided with a first micro-pipe and a second micro-pipe, a first steel wire and a second steel wire penetrate through the first micro-pipe, one end of the first steel wire is fixedly connected with a first fixing point 12 of the far bend 2, and the other end of the first steel wire is connected with the far bend control wheel in a matching mode. One end of the second steel wire is fixedly connected with a second fixing point 13 of the far bend 2, and the other end of the second steel wire is connected with the far bend control wheel in a matching manner. A third steel wire and a fourth steel wire penetrate through the second microtube, one end of the third steel wire is fixedly connected with a third fixing point 14 of the near bend 4, and the other end of the third steel wire is connected with the near bend control wheel in a matching mode. One end of the fourth steel wire is fixedly connected with a fourth fixing point 15 of the near bend 4, and the other end of the fourth steel wire is connected with the near bend control wheel in a matching manner.

The expanding tube, referring to fig. 3, is a hollow cavity inside, and is used for penetrating through the sheath tube to support and expand the sheath tube. The head end of expansion pipe tapers, and the length of head end is not more than 50mm, and the head end is provided with and guides the seal wire export. The expansion tube has a central inner diameter of no greater than 0.028 inches and an outer diameter of no less than 5F. The tail part of the expansion pipe is provided with a standard injector connector and a guide wire inlet.

When the catheter radio frequency ablation device in the embodiment is used for ablation, the ablation operation of the outflow tract of the right ventricle of the heart is taken as an example. After the preoperative preparation is completed, a guide wire with the length of about 160cm is sent into a human body through venipuncture, and the head end of the guide wire is sent into a focal cardiac cavity under the guide of fluoroscopy. Referring to fig. 4, the sheath is combined with the expansion tube into a combined structure as shown. The sheath tube and the expansion tube assembly are sleeved on the guide wire, and are sent into the sheath tube and the expansion tube assembly along the guide wire through the puncture point, and the tail part of the guide wire is fixed to prevent displacement. The length of the head end of the guide wire extending out of the head end of the expansion tube is always larger than 2cm, and the sheath tube and the expansion tube assembly are conveyed to the middle part of the right atrium under the guidance of the image. The tail part of the sheath tube is fixed, and the expansion tube and the guide wire are withdrawn from the human body together. After the sheath is fully deflated, heparin saline is injected to flush and fill the lumen of the sheath. The sheath irrigation tube 10 is connected to the infusion tube connector to continuously irrigate the sheath at a minimum drip rate. The lead interface 11 of the sheath is electrically connected with the three-dimensional electrophysiological equipment, and a three-dimensional image fed back by the visual electrode of the sheath is displayed on the equipment. Under the guidance of the three-dimensional image, the far bending end of the long sheath tube with the controllable sequence is controlled to be sent to the position 1/3 of the right atrium, and the near bending end 4 is bent towards the direction of the tricuspid valve, so that the far bending end of the long sheath tube with the controllable sequence points to the tricuspid valve. And slowly forwarding the far bent end of the controllable sequence bent long sheath to enter the right ventricular inflow channel and cross the right ventricular fornix part, adjusting the far bent end position and the bending degree of the near bend 4 of the controllable sequence bent long sheath to enable the far bent end to be positioned in the middle of the inflow channel in a nearly horizontal shape, and bending the far bend 2 to enable the far bent end of the controllable sequence bent long sheath to be upwards directed to the right ventricular outflow channel. The distal bend 2 end of the controllable sequence bent long sheath is adjusted and confirmed to be coaxial with the outflow tract of the right ventricle in a plurality of observation positions. The far bending end of the long sheath tube is sent forwards in a controllable sequence to enter the middle part of the outflow tract of the right ventricle. The catheter is sent into the ablation catheter through the long sheath tube with the controllable sequence, the head end of the catheter extends out of the far bent end of the long sheath tube with the controllable sequence, and the ablation catheter is operated to map, position and ablate the focus. After the ablation is finished, the catheter and the long sheath tube with the controllable sequence are taken out of the body, the puncture point is bound, and the operation is finished.

The catheter radiofrequency ablation device in the embodiment is adopted to carry out the catheter ablation operation, the two-way bending function of the far bend 2 and the near bend 4 of the long sheath tube with controllable sequences can be used independently, and can be combined to be bent in different directions for use, so that the catheter radiofrequency ablation device is suitable for complex internal environments such as human hearts and blood vessels, and an operator can effectively control operation actions by using the bending function and the visual function of the long sheath tube with controllable sequences to send the ablation catheter to a focus to complete the ablation operation.

It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention, and those skilled in the art can make various modifications and changes, and various embodiments can be freely combined. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

It should be noted that well-known methods, structures and techniques have not been shown in detail in the description of the specification in order not to obscure the understanding of this description.

Claims

1. A steerable, sequenced, curved, elongate sheath for catheter radio frequency ablation, comprising:

the far bending control piece controls the far bending through the first steel wire assembly, the far bending is suitable for bending along a first direction and a second direction, the bending angles are larger than 90 degrees, and the first direction is opposite to the second direction;

the near bending control part controls the near bending through a second steel wire assembly, the near bending is suitable for bending along a third direction and a fourth direction, the bending angles are larger than 90 degrees, and the third direction is opposite to the fourth direction;

2. The steerable, sequential curved, elongated sheath for catheter radio-frequency ablation of claim 1, wherein said first wire assembly, said second wire assembly, and said wire assembly are all disposed through said body portion.

3. The steerable sequence curved elongated sheath for catheter radio frequency ablation according to claim 2, further comprising: the first micro tube and the second micro tube are arranged in the body part, the first steel wire component penetrates through the first micro tube, and the second steel wire component penetrates through the second micro tube.

4. The steerable sequence curved elongated sheath for catheter radio-frequency ablation according to any of claims 1-3, wherein the first wire assembly comprises a first wire and a second wire, one end of the first wire is fixedly connected to the first fixation point of the distal curve, and the other end of the first wire is cooperatively connected to the distal curve manipulation member; one end of the second steel wire is fixedly connected with a second fixing point of the far bend, the other end of the second steel wire is connected with the far bend control piece in a matched mode, and the first fixing point and the second fixing point are arranged at one end, far away from the near bend, of the far bend and are arranged in central symmetry with each other;

the second steel wire component comprises a third steel wire and a fourth steel wire, one end of the third steel wire is fixedly connected with a third fixing point of the near bend, and the other end of the third steel wire is connected with the near bend control piece in a matched mode; one end of the fourth steel wire is fixedly connected with a fourth fixing point of the near bend, the other end of the fourth steel wire is connected with the near bend control piece in a matched mode, and the third fixing point and the fourth fixing point are arranged at one end, close to the far bend, of the near bend and are arranged in central symmetry with each other.

5. The steerable sequential curved elongated sheath for catheter rf ablation according to claim 1, wherein the distal curved manipulation member and the proximal curved manipulation member are both sleeved on the handle, the distal curved manipulation member controls the distal curve by rotation, and the proximal curved manipulation member controls the proximal curve by rotation.

6. The steerable sequence curved elongated sheath for catheter radiofrequency ablation of claim 1, wherein the visualization electrode assembly comprises a first visualization electrode, a second visualization electrode, and a third visualization electrode, the first visualization electrode is disposed at an end of the distal curve distal to the proximal curve, the third visualization electrode is disposed at an end of the proximal curve distal to the distal curve, and the second visualization electrode is disposed at a junction of the distal curve and the proximal curve.

7. The steerable sequence curved elongated sheath for catheter radio-frequency ablation of claim 6, wherein the visualization electrode is a piece of platinum-iridium alloy.

8. The steerable, sequential-curved, elongated sheath for catheter rf ablation of claim 1, wherein the sheath body is a piece of polyurethane tubing lined with braided steel wire.

9. The steerable sequence curved elongated sheath for catheter radio frequency ablation according to claim 1, further comprising:

and the flushing pipe is arranged at the tail end of the handle and is communicated with the interior of the body part, and the flushing pipe is used for sucking and flushing the inner cavity of the body part.

10. A catheter radio frequency ablation device, comprising:

a conduit;

a sheath bent in a controllable sequence for radiofrequency ablation of a catheter according to any one of claims 1 to 9, the sheath being configured to assist the catheter in extending into an area to be ablated.