CN219814291U

CN219814291U - Mapping catheter with removable straight tube

Info

Publication number: CN219814291U
Application number: CN202320557079.2U
Authority: CN
Inventors: 孙辉; 管月霞; 何婷; 胡登脉; 赵闯; 李志刚; 张坤
Original assignee: Shanghai Weiqi Medical Instrument Co ltd
Current assignee: Shanghai Weiqi Medical Instrument Co ltd
Priority date: 2023-03-21
Filing date: 2023-03-21
Publication date: 2023-10-13
Anticipated expiration: 2033-03-21

Abstract

The utility model provides a mapping catheter with a removable straight tube, which comprises: one end of the handle extends out of the catheter, an annular ring is arranged at one end of the catheter far away from the handle, and a plurality of mapping electrodes are distributed on the annular ring; the straight pipe is taken out, the straight pipe is sleeved on the outer wall of the catheter, and the straight pipe is assembled in a sliding way along the length direction of the catheter, so that the annular ring is straightened out through the inner hole; the straight pipe is detachably fixed on the locking device, and the straight pipe is provided with a tearing trace extending along a bus thereof. The straight tube is detachably connected to the locking device, the straight tube can be detached after the straight tube is used, and the straight tube is torn by the tearing mark on the straight tube, so that the straight tube is taken down on the catheter, the usable length of the catheter is effectively improved, and the influence of the straight tube on the operation in the operation process is reduced.

Description

Mapping catheter with removable straight tube

Technical Field

The utility model belongs to the technical field of mapping catheters, and particularly relates to a mapping catheter with a removable straight tube.

Background

Atrial fibrillation is a common arrhythmia, and the occurrence probability of atrial fibrillation is increased along with the increase of the age, so that complications such as thrombus and cardiomyopathy can be caused, and the health is seriously endangered.

The mature ablation technology in the market at present is radio frequency ablation and cryoablation, wherein the radio frequency ablation has the defects of high operation difficulty, long operation time, increased pain of patients in the operation process, difficulty in getting hands and the like. The cryoablation has the advantages of no pain, high efficiency, easy operation, etc. Cryoablation is increasingly being used in the market place, and the frequency of use of mapping catheters that match cryoablation is increasing.

The mapping catheter matched with cryoablation in the market is integrated with the straight tube and the locking device, and the effective length of the mapping catheter is influenced because no other effect exists after the straight tube is taken and the straight annular ring is taken. The doctor is difficult to adjust the position of the catheter in the body, and the operation difficulty is increased.

Accordingly, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, and provides a mapping catheter with a removable straight tube.

In order to achieve the above object, the present utility model provides the following technical solutions:

a mapping catheter with a removable alignment tube, the mapping catheter comprising:

the catheter is arranged at one end of the handle, which is far away from the handle, and an annular ring is arranged at one end of the catheter, and a plurality of mapping electrodes are distributed on the annular ring;

the straight pipe is taken out, is sleeved on the outer wall of the catheter, and is assembled in a sliding mode along the length direction of the catheter so as to take out the annular ring through the inner hole;

the handle with be equipped with the locker between the straight tube, the straight tube is fixed with detachable mode on the locker, be equipped with on the straight tube and follow the tear that its busbar extends.

Preferably, the locking device and the straight tube are connected into a whole in a clamping manner.

Preferably, the locking device is sleeved outside the catheter, the end part of the locking device comprises at least one petal-shaped protrusion extending along the radial direction of the locking device, the end part of the straightening tube is provided with a clamping groove with an opening facing the axis of the straightening tube, and the straightening tube is rotated to enable the clamping groove and the petal-shaped protrusion to be mutually staggered to form clamping connection.

Preferably, the number of the petal-shaped protrusions is two, and the two petal-shaped protrusions are symmetrically distributed about the locking device;

correspondingly, the number of the clamping grooves is two, and the gap between the two clamping grooves is not smaller than the petal-shaped protrusion.

Preferably, the number of the tearing marks is two, the two tearing marks are symmetrically distributed about the straight tube axis, and the straight tube is equally divided into two equal-divided pieces.

Preferably, the end of the straight tube far away from the annular ring is provided with two tearing handles, and the two tearing handles are respectively and fixedly connected with the two equal-dividing pieces.

Preferably, the mapping electrode is correspondingly connected with a power line, and the power line penetrates out of the handle from the inside of the catheter and is correspondingly connected with the electrophysiological instrument.

Preferably, the lock is elliptical.

Preferably, the straight tube is made of any one of PTFE material, FEP material and PE material.

Preferably, the length of the straightening tube is not less than the length of the annular ring.

The beneficial effects are that: the straight tube is detachably connected to the locking device, the straight tube can be detached after the straight tube is used, and the straight tube is torn by the tearing mark on the straight tube, so that the straight tube is taken down on the catheter, the usable length of the catheter is effectively improved, and the influence of the straight tube on the operation in the operation process is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. Wherein:

FIG. 1 is a schematic diagram of a mapping catheter in accordance with an embodiment of the present utility model;

FIG. 2 is a schematic view of the annular ring in an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a lock in an embodiment of the present utility model;

FIG. 4 is a schematic view of the structure of a straight pipe in an embodiment of the present utility model;

FIG. 5 is a schematic diagram of a lock and a straight tube according to an embodiment of the present utility model;

FIG. 6 is a schematic representation of the use of a mapping catheter in accordance with an embodiment of the present utility model;

FIG. 7 is a schematic diagram showing the lock and the alignment tube in an exploded state according to an embodiment of the present utility model.

In the figure: 1. a handle; 2. a lock; 3. taking a straight pipe; 4. a conduit; 5. an annular ring; 6. a power line; 7. an electrophysiology instrument; 21. a petal-shaped bulge; 31. a clamping groove; 51. mapping electrodes.

Detailed Description

The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the utility model, fall within the scope of protection of the utility model.

In the description of the present utility model, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. refer to the orientation or positional relationship based on that shown in the drawings, merely for convenience of description of the present utility model and do not require that the present utility model must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. The terms "coupled" and "connected" as used herein are to be construed broadly and may be, for example, fixedly coupled or detachably coupled; either directly or indirectly through intermediate components, the specific meaning of the terms being understood by those of ordinary skill in the art as the case may be.

The utility model will be described in detail below with reference to the drawings in connection with embodiments. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

Atrial fibrillation is a common arrhythmia, and the occurrence probability of atrial fibrillation is increased along with the increase of the age, so that complications such as thrombus and cardiomyopathy can be caused, and the health is seriously endangered. Cryoablation is increasingly being used in the market place, and the frequency of use of mapping catheters that match cryoablation is increasing. The straight tube 3 of the existing mapping catheter 4 is integrated with the locking device 2, and no other effect is caused after the straight tube 3 is taken out of the straight annular ring 5, and the effective length of the mapping catheter 4 is affected. The doctor is not easy to adjust the position of the catheter 4 in the body, and the operation difficulty is increased.

Aiming at the defects, the utility model provides the mapping catheter which can take the straight tube 3 off the catheter 4, so that the usable length of the catheter 4 is effectively increased, and the influence of the straight tube 3 on the operation in the operation process is reduced.

As shown in the schematic structure of the mapping catheter in fig. 1, the mapping catheter 4 is composed of a handle 1, a locking device 2, a straightening tube 3, a catheter 4 and an annular ring 5, wherein the annular ring 5 is provided with a mapping electrode 51. The number of the mapping electrodes 51 is 8 or 10, and the mapping electrodes 51 are uniformly distributed on the annular ring 5. The mapping catheter 4 is connected with the electrophysiology instrument 7 through the power line 6 and is used for detecting electrocardiosignals, evaluating the ablation state according to whether the electric signals at the pulmonary veins are normally transmitted or not, and if the electrophysiology instrument 7 can not record the electric signals, the successful ablation is indicated.

As shown in the schematic structure of the annular ring 5 in fig. 2, the annular ring 5 is formed into an annular shape by thermoforming, and the annular ring 5 should have more than one ring on the axial projection of the catheter 4, so that an annular structure for detecting an electrical signal at a pulmonary vein can be formed intravenously.

As shown in a schematic structure of the lock 2 in fig. 3, the lock 2 is in an elliptic shape, so that the lock 2 can be held by hand to drive the alignment tube 3 during operation, wherein the lock 2 can be in a hollow structure or is externally provided with anti-skid patterns, and the lock 2 is made of any one of a PC material, an ABS material, a pc+abs material, a PE material and a PEEK material.

As shown in fig. 4, the straight tube 3 is schematically structured, the straight tube 3 is slidably sleeved on the outer wall of the catheter 4, the inner hole of the straight tube is a straight channel, and the annular ring 5 is restrained by the straight channel to straighten in the forward pushing process of the straight tube 3, so that the straight tube 3 can be smoothly inserted into a compatible instrument.

Wherein, the straight tube 3 is detachably connected to the lock 2, after the use, the straight tube 3 can be removed, and the straight tube 3 is torn by using the tear mark on the straight tube 3, so that the straight tube 3 is taken down on the guide tube 4.

Preferably, the number of the tearing marks is two, the two tearing marks are symmetrically distributed about the axis of the straight pipe taking device 3, and the straight pipe taking device 3 is equally divided into two equal parts.

In order to facilitate tearing of the straight tube 3, two tearing handles are arranged at one end, far away from the annular ring 5, of the straight tube 3, and the two tearing handles are fixedly connected with two equal-dividing pieces respectively.

As shown in fig. 5 and 7, the locking device 2 and the straight tube 3 are in a clamping state, the front end of the locking device 2 is provided with a connecting tube concentric with the guide tube 4, the end of the connecting tube is provided with a petal-shaped protrusion 21, one end corresponding to the straight tube 3 is provided with a clamping groove 31, and the two are rotated relatively to enable the petal-shaped protrusion 21 to form butt joint with the clamping groove 31, so that the straight tube 3 and the locking device 2 are fixed.

In the use process, the locking device 2 and the straight tube 3 are clamped together, and the locking device 2 is pushed to move along the catheter 4 until the straight tube 3 straightens the annular ring 5, and then the annular ring is placed into a compatible communication building apparatus. The mapping catheter 4 is placed in a compatible instrument, the locking device 2 is retracted, then the straight tube 3 is rotated relative to the locking device 2, the straight tube 3 is separated from the locking device 2, the straight tube 3 is torn along a tearing trace, the straight tube 3 is separated from the catheter 4, only the locking device 2 which is convenient for operating the catheter 4 is arranged on the catheter 4, and the effective length of the catheter 4 can be increased.

In an alternative embodiment, the mapping catheter comprises a handle 1, a straight tube 3 and a locker 2, wherein one end of the handle 1 extends out of the catheter 4, an annular ring 5 is arranged at one end of the catheter 4 far away from the handle 1, a plurality of mapping electrodes 51 are distributed on the annular ring 5, the mapping electrodes 51 are uniformly distributed on the annular ring 5, the mapping catheter 4 is connected with an electrophysiology instrument 7 through a power line 6 and is used for detecting electrocardiosignals, and the ablation state is evaluated according to whether the electric signals at the pulmonary veins are normally transmitted or not, and if the electrophysiology instrument 7 cannot record the electric signals, the successful ablation is indicated.

The straight pipe taking device comprises a straight pipe taking device, a straight pipe taking device and a straight pipe taking device, wherein the straight pipe taking device is characterized in that the straight pipe taking device 3 is sleeved on the outer wall of a guide pipe 4 and is assembled in a sliding mode along the length direction of the guide pipe 4, an inner hole of the straight pipe taking device 3 is a straight taking channel, and in the forward pushing process of the straight pipe taking device 3, an annular ring 5 enters the straight pipe taking device 3 and is limited by the inner hole of the straight pipe taking device 3, and the straight pipe taking device is provided with the annular ring 5.

A locking device 2 is arranged between the handle 1 and the straight tube 3, the locking device 2 is used for operating the mapping catheter, the locking device 2 is assembled outside the catheter 4 in a sliding assembly mode, the straight tube 3 is detachably fixed on the locking device 2, and the straight tube 3 can be driven to slide along the catheter 4 through the locking device 2.

The straight pipe 3 is provided with a tearing trace extending along a bus thereof, and the tearing trace can be a point broken line formed by laser engraving, so that the straight pipe can be torn under the action of external force, or the tearing trace is a strip-shaped groove, and can be torn along the weak point of the strip-shaped groove under the action of external force. After the straightening operation is finished, the straight tube 3 can be torn along the tearing mark by tearing the straight tube 3, so that the straight tube 3 can be easily taken down.

In an alternative embodiment, the locking device 2 and the straight tube 3 are integrally connected in a clamping manner, the clamping manner is simple, and the specific clamping manner comprises annular, cantilever, torsion and the like.

In this embodiment, the locking is preferably performed in a torsion mode, specifically, the lock 2 is sleeved outside the catheter 4, one end of the lock 2 corresponding to the straight tube 3 is provided with a connecting tube, the end of the connecting tube is provided with at least one petal-shaped protrusion 21 extending along the radial direction of the connecting tube, the end of the straight tube 3 is provided with a clamping groove 31 with an opening facing the axis of the straight tube, and the straight tube 3 is rotated to enable the clamping groove 31 and the petal-shaped protrusion 21 to be mutually staggered to form the locking.

Wherein, the lobe projections 21 may be arc convex strips, the lobe projections 21 may be 2-4, and the number of the clamping grooves 31 corresponds to the lobe projections 21.

In an embodiment, the number of the lobe projections 21 is preferably two, the two lobe projections 21 are symmetrically distributed about the lock 2, the outer edge of the lobe projection 21 is annular concentric with the guide tube, the angle of the arc corresponding to the lobe projection 21 is not greater than 90 °, the number of the corresponding clamping grooves 31 is two, the clamping grooves 31 are arc grooves and are matched with the lobe projections 21, and two ends of the arc grooves are respectively provided with openings, so that the lobe projections 21 can be screwed in or screwed out at two ends of the arc grooves through rotation, and the gap between the two clamping grooves 31 is not smaller than the lobe projections 21.

In this embodiment, the angle corresponding to the lobe 21 and the arc groove is 90 °.

In an alternative embodiment, the number of the tearing marks is two, and the tearing marks can be point broken lines formed by laser engraving, so that the tearing marks can be torn under the action of external force, or the tearing marks are strip-shaped grooves and can be torn along weak points of the strip-shaped grooves under the action of external force. The two tearing marks are symmetrically distributed about the axis of the straight part so as to equally divide the straight part into two equal parts, and the two equal parts are torn in two opposite directions, so that the two equal parts are separated along the tearing marks, and the straight pipe 3 is convenient to take down.

Preferably, the end of the straight piece far away from the annular ring 5 is provided with a tearing opening corresponding to the tearing mark, so that the straight piece is convenient to tear along the tearing mark.

In an alternative embodiment, the end of the straight tube 3 far away from the annular ring 5 is provided with two tearing handles, and the two tearing handles are respectively and fixedly connected with two equal-dividing pieces.

The tearing handle can be fixed on the straight pipe 3 in a glue and hot melting mode, or the tearing handle and the straight pipe 3 are integrally formed.

Preferably the tear handle may be in the shape of a wing nut.

In an alternative embodiment, the mapping electrode 51 is correspondingly connected with a power wire 6, the power wire 6 is correspondingly connected with the electrophysiology instrument 7 after penetrating out of the handle 1 from the interior of the catheter 4, and the power wire 6 is used for transmitting an electric signal and supplying power to the mapping electrode 51.

In this embodiment, the annular ring 5 is made of nickel-titanium, and is formed into an annular ring 5 by thermoforming, and the outer portion of the annular ring 5 is coated with artificial leather to adapt to the inner wall of a human blood vessel and avoid damaging the blood vessel, the annular ring 5 can be connected with the catheter 4 by high-frequency welding, and the end portions of the annular ring 5 and the catheter 4 are connected and fixed by using the skin effect and the adjacent effect generated by high-frequency current.

In an alternative embodiment, the lock 2 is ellipsoidal, however, the shape of the lock 2 is not limited herein, and the lock 2 may be any shape such as a column, a sphere, etc., and the specific shape is convenient for grasping and performing the alignment operation.

The straight tube 3 is made of any one of PTFE material, FEP material and PE material.

In an alternative embodiment, the length of the straightening tube 3 is not less than the length of the annular ring 5, and during use, the lock 2 and the straightening tube 3 are fixed together by the lugs 21 and the clamping grooves 31, and the lugs 21 and the clamping grooves 31 are mutually staggered to be fixed in the axial direction.

The locking device 2 is pushed to move along the guide pipe 4 until the annular ring 5 enters the straight pipe taking device 3, the annular ring 5 is straightened through the straight pipe taking device 3, and then the straight pipe taking device 3 drives the annular ring 5 to be integrally placed into a compatible building-through instrument.

After the mapping catheter is placed in the compatible instrument, the locking device 2 is retracted, the straight tube 3 is rotated relative to the locking device 2, the straight tube 3 is separated from the locking device 2, and the straight tube 3 is torn by tearing the tearing handles towards two sides, so that the straight tube 3 is separated from the catheter 4. At this point, only the lock 2 is present on the catheter 4 to facilitate the manipulation of the catheter 4, and the effective length of the catheter 4 is increased.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A mapping catheter with a removable alignment tube, the mapping catheter comprising:

2. The removable access tube mapping catheter of claim 1, wherein the lock and the access tube are integrally connected by means of a snap fit.

3. The removable mapping catheter of claim 2, wherein the lock is sleeved outside the catheter, the end of the lock comprises at least one petal-shaped protrusion extending radially along the lock, the end of the alignment tube is provided with a clamping groove with an opening facing the axis of the alignment tube, and the alignment tube is rotated to enable the clamping groove and the petal-shaped protrusion to be mutually staggered to form a clamping connection.

4. A catheter according to claim 3, wherein there are two lobes and two lobes are symmetrically distributed about the lock;

5. The removable straight tube mapping catheter of claim 1, wherein there are two tear lines, the two tear lines being symmetrically distributed about the straight tube axis, dividing the straight tube equally into two equal halves.

6. The removable mapping catheter of claim 5, wherein the end of the straight tube remote from the annular ring is provided with two tear handles, and the two tear handles are respectively and fixedly connected with the two bisecting members.

7. The removable mapping catheter of claim 1, wherein the mapping electrode is correspondingly connected with a power cord, and the power cord is correspondingly connected with an electrophysiology instrument after penetrating out of the handle from the catheter.

8. The catheter of claim 1, wherein the locking device is ellipsoidal.

9. The removable straight tube mapping catheter of claim 1, wherein the straight tube is made of any one of PTFE material, FEP material, or PE material.

10. The catheter of claim 1, wherein the length of the catheter is not less than the length of the annular ring.