CN214231491U

CN214231491U - Operating handle of radiofrequency ablation catheter

Info

Publication number: CN214231491U
Application number: CN202022046728.1U
Authority: CN
Inventors: 徐宏; 王耀辉; 叶亚彬; 秦翔翔
Original assignee: Hangzhou Kunbo Biotechnology Co Ltd
Current assignee: Hangzhou Kunbo Biotechnology Co Ltd
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2021-09-21
Anticipated expiration: 2030-09-17

Abstract

The application discloses radio frequency melts operating handle of pipe, is equipped with the traction wire that is used for transferring the turn in the radio frequency melts the pipe, and operating handle includes: the proximal end of the radio frequency ablation catheter is fixed on the handle body; the connecting piece is slidably arranged on the handle body and is provided with a mounting hole; an avoidance channel is arranged on the connecting piece, and a corresponding part extending towards the near end of the operating handle in the radio frequency ablation catheter passes through the connecting piece through the avoidance channel; the plug is rotatably matched in the mounting hole, and the proximal end part of the traction wire is clamped and fixed in a radial gap between the plug and the mounting hole; the driving piece is movably arranged on the handle body and drives the connecting piece to slide so as to drive the traction wire. The utility model discloses a technical scheme passes through the cock and realizes connecting piece and traction wire, assembles simply easily and adjusts to when the traction wire received great effort, the cock can play the effect that prevents the overload through self rotation, avoids the traction wire to break at weak position.

Description

Operating handle of radiofrequency ablation catheter

Technical Field

The application relates to the field of medical equipment, in particular to an operating handle of a radio frequency ablation catheter.

Background

Interventional instruments are commonly used medical devices during surgical procedures. After the interventional device enters the human body, because the structure in the human body is complex, the posture, shape, state and the like of the interventional device in the human body are often required to be adjusted, so the interventional device usually needs an operation handle at the near end to realize the functions.

For example, chinese patent publication No. CN103785095A discloses a single-bend handle with a labor-saving mechanism, which includes a handle and a manipulating member slidably mounted in the handle, a catheter body is connected to the manipulating member, and a traction wire is connected to a slider in the handle, and is characterized in that: the single-bending handle with the labor-saving mechanism further comprises a labor-saving gear, the labor-saving gear is arranged in the handle and comprises a first gear and a second gear which are fixedly connected coaxially, the first gear is meshed with a rack arranged on the control component, and the second gear is meshed with a rack arranged on the handle.

However, the prior art handle is complicated in assembly and has room for improvement.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the application discloses radio frequency melts operating handle of pipe, be equipped with the pull wire that is used for transferring the turn in the radio frequency melts the pipe, operating handle includes:

the proximal end of the radio frequency ablation catheter is fixed on the handle body;

the connecting piece is slidably mounted on the handle body, and a mounting hole is formed in the connecting piece; an avoidance channel is arranged on the connecting piece, and a corresponding part extending towards the near end of the operating handle in the radio frequency ablation catheter passes through the connecting piece through the avoidance channel;

a plug rotatably fitted in the mounting hole, a proximal end portion of the pull wire being clampingly fixed in a radial gap between the plug and the mounting hole;

the driving piece is movably arranged on the handle body and drives the connecting piece to slide so as to drive the traction wire.

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

Optionally, a threading channel penetrating through the wall of the mounting hole is formed in the connecting piece, and the proximal end portion of the traction wire enters the radial gap through the threading channel.

Optionally, the plug is cylindrical and has a drive slot on an end face.

Optionally, the plug is provided with a docking channel, and the plug rotates relative to the connecting member by itself and respectively has:

in a release state, the threading channel and the butt joint channel are aligned with each other, and the traction wire enters the butt joint channel from the threading channel;

and in a locked state, the threading channel and the butt joint channel are staggered, and the traction wire enters the radial gap from the threading channel, extends along the circumferential direction of the cock and then enters the butt joint channel.

Optionally, the threading channel comprises a first channel distal to the mounting hole and a second channel proximal to the mounting hole, the cock, by itself rotating relative to the coupling member, respectively having:

in a release state, each threading channel is aligned with the butt joint channel and allows the traction wire to directly pass through;

and in a locking state, the butt joint channel and each threading channel are staggered, and the corresponding part of the traction wire is twisted and clamped and fixed in the radial gap.

Optionally, the mounting hole is a blind hole and does not intersect with the avoidance channel.

Optionally, a threading channel penetrating through the wall of the mounting hole is formed in the connecting piece, and a proximal end portion of the traction wire enters the radial gap through the threading channel; the avoidance channel and the threading channel are arranged in parallel and are positioned below the threading channel.

Optionally, the handle body is of a cylindrical structure, a guide strip hole extending along the axial direction is formed in the side wall of the handle body, the connecting piece is slidably mounted inside the cylindrical structure, a guide key extending out of the guide strip hole along the radial direction is arranged on the connecting piece, the driving piece is rotatably sleeved on the periphery of the handle body, and the inner wall of the driving piece is provided with a threaded structure matched with the guide key.

Optionally, a part of the side wall of the cylindrical structure is a detachable cover body, the guide strip hole is located at a seam between the cover body and the other part of the cylindrical structure, and the cock is located on one side of the connecting piece facing the cover body.

Optionally, the tubular structure for the near-end one side self material of other positions of lid extends and forms the holding ring, be equipped with on the driving piece with holding ring complex end cover, end cover one end run through the driving piece and with the holding ring block, the other end expands and forms the location end, the location end is used for confirming the driving piece with the relative position of handle body, the location is served and is equipped with the pipeline hole.

According to the technical scheme, the connecting piece and the traction wire are realized through the cock, the assembly is simple, the adjustment is easy, and when the traction wire receives a larger acting force, the cock can play a role of preventing overload through self rotation, so that the traction wire is prevented from being broken at a weak position; meanwhile, the avoiding holes are formed in the connecting piece, so that the size of the connecting piece can be increased as much as possible under the condition that other parts are not interfered, the contact area between the connecting piece and the handle body is increased, and the movement stability of the connecting piece is guaranteed.

Specific advantageous technical effects will be further explained in conjunction with specific structures or steps in the detailed description.

Drawings

FIG. 1 is a schematic view of an exemplary RF ablation catheter;

FIG. 2a is an exploded view of the operating handle;

FIG. 2b is a schematic view of the internal structure of the operating handle;

FIG. 2c is a schematic view of the internal structure of the operating handle from another perspective;

FIG. 3a is a schematic view of an end cap configuration;

fig. 3b is a schematic view of the end cap and driver mating.

The reference numerals in the figures are illustrated as follows:

106. drawing wires;

300. an operating handle; 301. a handle body; 302. a connecting member; 303. mounting holes; 304. avoiding the channel; 305. a cock; 3051. a drive slot; 306. a drive member; 307. gripping the sheath; 308. a threading channel; 3081. a first channel; 3082. a second channel; 309. a docking channel; 311. a guide bar hole; 312. a guide key; 314. a cover body; 315. splicing the seams; 316. a positioning ring; 317. an end cap; 3171. a positioning end; 3172. a line hole.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the prior art, the traction wire is usually matched with the connecting piece through the fixation of the traction wire, usually through a fixed pressing block or a fixed clamping piece with an expanded end part.

The inventor finds that similar to the above documents, the fixing mode of the pressing block or the fixing clamp limits the finished product length of the traction wire, cannot be adjusted in the assembling process, and is complex to assemble in the production process; and after the traction wire is inserted into a human body, effective overload protection cannot be realized when the traction wire bears large torque, and certain potential safety hazards exist.

Referring to fig. 1 to 3b, the present application discloses an operating handle 300 of a radio frequency ablation catheter, in which a pull wire 106 for bending adjustment is disposed, the operating handle 300 comprising:

the proximal end of the radiofrequency ablation catheter is fixed to the handle body 301;

a connecting piece 302 which is slidably mounted on the handle body 301, wherein a mounting hole 303 is arranged on the connecting piece 302; an avoiding channel 304 is arranged on the connecting piece 302, and corresponding parts extending towards the proximal end of the operating handle 300 in the radiofrequency ablation catheter pass through the connecting piece 302 through the avoiding channel 304;

a cock 305 rotatably fitted in the mounting hole 303, a proximal end portion of the traction wire 106 being held fixed in a radial gap between the cock 305 and the mounting hole 303;

the driving member 306 is movably mounted on the handle body 301, and drives the connecting member 302 to slide to drive the pull wire 106.

The handle body 301 provides support for each component and provides holding space for an operator, and a holding sheath 307 for improving holding hand feeling can be further arranged. The link 302 restricts the movement path in the space by the handle body 301. Therefore, the avoidance hole arranged on the connecting piece 302 can increase the volume of the connecting piece 302 as much as possible under the condition of not interfering other components, thereby increasing the contact area with the handle body 301 and ensuring the stability of the movement of the connecting piece 302. The cock 305 enables assembly of the pull wire 106 and the coupling member 302. The design of the cock 305 allows for easy assembly and adjustment, and the cock 305 allows for flexible adjustment of the specific location of the coupling of the pull wire 106 to the coupling member 302, and allows for the release of length tolerances of the pull wire 106, as compared to the related art. Meanwhile, when the pull wire 106 receives a large acting force, the cock 305 can play a role in preventing overload through self-rotation, and the pull wire 106 is prevented from being broken at a weak position.

In a specific fitting relationship of the pull wire 106, referring to an embodiment, the connector 302 is provided with a threading channel 308 penetrating the wall of the mounting hole 303, and the proximal portion of the pull wire 106 enters the radial gap through the threading channel 308.

The threading channel 308 is used for the traction wire 106 to thread, and when the traction wire 106 is threaded into the radial gap, the rotation of the cock 305 will drive the traction wire 106 to enter the interlayer between the cock 305 and the mounting hole 303, thereby realizing the clamping. In one embodiment, the cock 305 is provided with a receiving groove (not shown) for receiving at least a portion of the pull wire 106. The containing groove is formed along the circumferential direction of the cock 305 and is used for containing the traction wire 106 in the rotating process of the cock 305, so that the resistance of rotating and rotating can be reduced, and overlarge stress on the traction wire 106 is avoided; secondly, the position of the traction wire 106 can be limited, the situations such as dislocation and the like can be avoided, and the stability is improved.

There are various ways for the cock 305 to drive the pull wire 106 to move together in the process of rotating itself, for example, by friction or by separately providing a clamping structure protruding out of the cock 305, and it is also possible to refer to an embodiment in which the cock 305 is provided with a docking channel 309, and the rotation of the cock 305 with respect to the connector 302 by itself respectively has:

in a release state (not shown), the threading channel 308 and the docking channel 309 are aligned with each other, and the pull wire 106 enters the docking channel 309 from the threading channel 308;

in the locked state (see fig. 2b and 2c), the threading channel 308 and the docking channel 309 are misaligned, and the pull wire 106 enters the radial gap from the threading channel 308, extends circumferentially along the cock 305 and enters the docking channel 309.

The docking channel 309 can accommodate the pull wire 106 and drive the pull wire 106 to rotate together when the cock 305 rotates, avoiding the disadvantage of weak constraint on the pull wire 106 in other structures. The docking channel 309 allows the pull wire 106 to be reciprocally threaded, thereby increasing the clamping strength of the pull wire 106 without changing the overall structure. In correspondence with the reciprocal threading feature, with reference to an embodiment in which the threading channel 308 comprises a first channel 3081 on the distal side of the mounting hole 303 and a second channel 3082 on the proximal side of the mounting hole 303, the rotation of the tap 305 with respect to the connection element 302 by itself has respectively:

in the release state, each threading channel 308 and the docking channel 309 are aligned with each other and allow the traction wire 106 to pass through directly;

in the locked state, the docking channel 309 and each threading channel 308 are misaligned, and the corresponding portion of the pull wire 106 is twisted and clamped in the radial gap.

The arrangement of the first channel 3081 and the second channel 3082 can be used for realizing reciprocating penetration of the traction wire 106 in the butt joint channel 309, and in the scheme of unidirectional penetration, the arrangement of the first channel 3081 and the second channel 3082 can facilitate installation of the traction wire 106, allow the traction wire 106 to leave an assembly allowance on the near end side of the mounting hole 303, and facilitate releasing of a matching error in the rotation process of the cock 305.

When the cock 305 is in the locked state, the threading channel 308 and the docking channel 309 are angled. The threading channel 308 forms a fixed angle with the axial direction of the docking channel 309, the cock 305 is in a locked state, the fixed angle is 30 degrees to 110 degrees, and the cock 305 is installed in the installation hole 303 through the traction wire 106 in an interference fit mode.

In the driving form of the cock 305, a driving structure for applying a force may be provided on the cock 305, and it is also referred to an embodiment that the cock 305 has a cylindrical shape with a driving groove 3051 formed on an end surface.

The drive slot 3051 is formed by the end face stock removal process of the cock 305, avoiding waste of separately provided stock. The cylindrical unitary structure facilitates the fitting and rotation of the cock 305 within the mounting hole 303.

The rf ablation catheter has a plurality of conduits extending proximally, such as wires for delivering rf signals, fluid conduits for delivering a cooling medium, etc., so that the handle body 301 itself is also a passage for such conduits. The connector 302 needs to avoid interference with the above-described tubing during sliding. In one embodiment, the connector 302 is provided with an avoidance channel 304, and the corresponding component of the rf ablation catheter extending toward the proximal end of the operating handle 300 passes through the connector 302 via the avoidance channel 304.

The connector 302 in this embodiment has the advantage of increasing the volume of the connector 302 as much as possible without interfering with other components, as compared to the connector 302 avoiding the corresponding area of the pipeline as a whole. The larger the contact area between the connecting piece 302 and the handle body 301 is, the stronger the sliding constraint capacity of the handle body 301 can be improved, so that the movement stability of the connecting piece 302 is ensured; accordingly, the larger the volume and mass of the coupling element 302, the more stable the driving effect on the traction wire 106, and the better the handling feel.

In the detailed arrangement of the avoiding channel 304 and the mounting hole 303, referring to an embodiment, the mounting hole 303 is a blind hole and does not intersect with the avoiding channel 304.

The tap 305 in the mounting hole 303 may generate a large stress when clamping the traction wire 106, and may generate a certain danger in an unexpected situation, and the arrangement of the two parts separated from each other can avoid the above situation, and improve the stability of the whole operation handle 300.

In the matching details of the threading channel 308 and the avoiding channel 304, referring to an embodiment, the connecting member 302 is provided with a threading channel 308 penetrating through the hole wall of the mounting hole 303, and the proximal end portion of the traction wire 106 enters the radial gap through the threading channel 308; the escape channel 304 is disposed parallel to the threading channel 308 and below the threading channel 308. In the embodiment, the lower part refers to fig. 2b, the avoiding channel 304 is located below the threading channel 308, and the extending directions of the avoiding channel and the threading channel are parallel to each other, so that the pipeline can be conveniently threaded in the assembling process.

In addition to the sliding constraint of the inner wall of the handle body 301 to the connecting member 302, in an embodiment, the handle body 301 is a cylindrical structure, and the sidewall is provided with a guide bar hole 311 extending along the axial direction, the connecting member 302 is slidably mounted inside the cylindrical structure, the connecting member 302 is provided with a guide key 312 extending out of the guide bar hole 311 along the radial direction, the driving member 306 is rotatably sleeved on the periphery of the handle body 301, and the inner wall of the driving member 306 has a threaded structure matching with the guide key 312.

The guide bar holes 311 and guide keys 312 provide sliding pairs for limiting movement of the connector 302. Meanwhile, the thread structure can accurately determine the position of the guide key 312 relative to the guide bar hole 311, thereby determining the relative position of the connecting piece 302 relative to the handle body 301 and realizing the driving.

In the specific arrangement of the handle body 301, referring to an embodiment, a part of the side wall of the cylindrical structure is a detachable cover 314, the guide strip hole 311 is located at a seam 315 between the cover 314 and the rest of the cylindrical structure, and the cock 305 is located on the side of the connecting member 302 facing the cover 314.

The removable cover 314 in effect provides an access opening in the handle body 301 to facilitate assembly of the components, and similarly, the tap 305 is located on the side of the connector 302 facing the cover 314. Meanwhile, the guide strip holes 311 are formed in the abutted seam 315, so that mechanical weak areas on the handle body 301 can be reduced.

The driving force of the connector 302 comes from the rotation of the driver 306, and therefore the relative position of the driver 306 with respect to the handle body 301 needs to be determined. Referring to an embodiment, the cylindrical structure extends from its material to form a positioning ring 316 relative to the proximal side of the other portion of the cover 314, an end cap 317 is disposed on the driving member 306 and is engaged with the positioning ring 316, one end of the end cap 317 extends through the driving member 306 and is engaged with the positioning ring 316, the other end of the end cap is expanded to form a positioning end 3171, the positioning end 3171 is used for determining the relative position between the driving member 306 and the handle body 301, and a pipeline hole 3172 is disposed on the positioning end 3171.

The positioning end 3171 of the end cap 317 can ensure the relative position of the driving member 306 and the handle body 301 during the rotation process, thereby realizing the driving of the connecting member 302. The handle body 301 is clamped with the end cover 317 through the positioning ring 316 formed by an integral material, so that the influence of the separated cover 314 on the installation effect of the end cover 317 can be avoided, and the whole structure is compact and stable.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims

1. The operating handle of radio frequency ablation pipe, be equipped with the pull wire that is used for transferring the turn in the radio frequency ablation pipe, its characterized in that, operating handle includes:

2. The handle of claim 1, wherein the connector defines a threading channel through a wall of the mounting hole, and a proximal portion of the pull wire enters the radial gap through the threading channel.

3. The manipulating handle for a radio frequency ablation catheter according to claim 1, wherein the cock is cylindrical and has a driving groove on an end surface thereof.

4. The handle of claim 2, wherein the plug has a docking channel, and the plug is rotatable relative to the connector by itself and comprises:

5. The manipulating handle for a radiofrequency ablation catheter as set forth in claim 4, wherein the threading passage includes a first passage at a distal side of the mounting hole and a second passage at a proximal side of the mounting hole, and the cock has by itself rotating relative to the coupling member:

6. The manipulating handle of the radiofrequency ablation catheter as in claim 1, wherein the mounting hole is a blind hole and does not intersect the avoidance channel.

7. The operating handle of the radiofrequency ablation catheter of claim 1, wherein the connecting piece is provided with a threading channel which passes through the wall of the mounting hole, and a proximal end portion of the traction wire enters the radial gap through the threading channel; the avoidance channel and the threading channel are arranged in parallel and are positioned below the threading channel.

8. The operating handle of the radiofrequency ablation catheter as claimed in claim 1, wherein the handle body is a cylindrical structure, and the sidewall of the handle body is provided with a guide bar hole extending along the axial direction, the connecting member is slidably mounted inside the cylindrical structure, the connecting member is provided with a guide key extending out of the guide bar hole along the radial direction, the driving member is rotatably sleeved on the outer periphery of the handle body, and the inner wall of the driving member is provided with a thread structure matched with the guide key.

9. The handle of claim 8, wherein a portion of the sidewall of the cylindrical structure is a detachable cover, the guide bar hole is formed at a seam between the cover and the rest of the cylindrical structure, and the tap is formed at a side of the connector facing the cover.

10. The handle of claim 9, wherein the tubular structure extends from a material of the proximal end of the other portion of the cover to form a positioning ring, the driving member has an end cap engaged with the positioning ring, one end of the end cap extends through the driving member and engages with the positioning ring, the other end of the end cap expands to form a positioning end, the positioning end is used for determining a relative position between the driving member and the handle body, and the positioning end has a wire hole.