CN216985066U

CN216985066U - Rotary grinding system and driving handle thereof

Info

Publication number: CN216985066U
Application number: CN202123100765.7U
Authority: CN
Inventors: 谢磊; 赵承; 孔令娟; 黄飞虎; 刘梦钦; 郭澜涛
Original assignee: Shanghai Hongmai Medical Technology Co ltd
Current assignee: Shanghai Hongmai Medical Technology Co ltd
Priority date: 2021-12-10
Filing date: 2021-12-10
Publication date: 2022-07-19
Anticipated expiration: 2031-12-10

Abstract

The utility model relates to a rotary grinding system and a driving handle thereof, wherein the driving handle comprises a handle shell, a driving assembly and a telescopic guide piece, the driving assembly is arranged in the handle shell and can move along a rotary grinding guide wire, the telescopic guide piece is arranged along a guide wire cavity of the handle shell and is provided with a first guide channel, a driving shaft and the rotary grinding guide wire movably penetrate through the first guide channel, the far end of the first telescopic guide piece is connected with the handle shell, the telescopic guide piece is in linkage connection with the driving assembly, and when the driving assembly and the driving shaft move along the rotary grinding guide wire, the telescopic guide piece moves telescopically in the handle shell. According to the rotational grinding system and the driving handle thereof, the first guide channel of the telescopic guide part is used for radially supporting and axially guiding the driving shaft and the rotational grinding guide wire which penetrate through the first guide channel, so that a large-scale operation platform is not required to be configured for maintaining the axial movement and guidance of structures such as the rotational grinding guide wire or the rotational grinding guide pipe, and the operation portability of the driving handle is improved.

Description

Rotary grinding system and driving handle thereof

Technical Field

The utility model relates to the technical field of interventional medical treatment, in particular to a rotary grinding system and a driving handle thereof.

Background

Atherosclerosis is mostly seen in lower limb arteries, is characterized by thickened vessel wall and narrow vessel lumen due to fibrolipid plaque formed in the artery intima, is mainly distributed in the artery intima of popliteal femoris and knee, and is caused by diseased artery lumen stenosis and even obstruction, so that diseases such as limb ischemia, gangrene and the like are caused, and claudication and amputation are often caused if treatment is not performed in time. Atherosclerotic plaques may exhibit different characteristics depending on the texture of the plaque, and currently in medical practice, severe calcified lesions are often pretreated with atherectomy devices. The principle of adopting the atherectomy device to carry out treatment is that the track rotary grinding device is used for carrying out high-speed rotary grinding on the vascular lesion, calcified or fibrous arteriosclerosis plaques are removed, blood vessels blocked by the plaques are opened, smoother blood vessel lumen gain is obtained, and the follow-up implantation of a medicine balloon and a stent is facilitated. In interventional therapy of stenoses at intimal openings and bifurcations and stenoses with angles, eccentricities, long sections and spots, orbital atherectomy has become a more clinically applied means for removing atherosclerotic plaques.

The current peripheral track rotary grinding catheter system mainly comprises a control host, a driving handle, a driving shaft and a rotary grinding head, wherein the control host controls a driving assembly in the driving handle to drive the driving shaft to rotate at a high speed and move the driving assembly back and forth, so that the rotary grinding head connected to the far end of the driving shaft removes lesions in a grinding mode, and plaques or calcified lesions are ablated into tiny particles (smaller than the diameter of red blood cells). The treatment is carried out by adopting peripheral artery track rotational abrasion, the treatment device can be suitable for seriously calcified pathological changes, the track rotational abrasion is firstly used for preprocessing the pathological changes, the preparation of a tube cavity is made, and then a medicine balloon or a bracket is placed, so that the success rate of interventional therapy is improved, and the occurrence of complications is reduced.

However, in order to meet the requirement of guiding the axial moving stroke of the driving assembly in the driving handle, the overall structure of the driving handle is heavy, an operating platform required to be configured is large, and the operation is inconvenient.

SUMMERY OF THE UTILITY MODEL

Based on this, provide a drive handle and include this drive handle's rotary grinding system to solve the inconvenient problem of operation.

In one aspect, an embodiment of the present invention provides an actuating handle, including:

the handle shell is provided with a guide wire cavity, and the guide wire cavity penetrates through the near end and the far end of the handle shell and is used for a rotary grinding guide wire to pass through;

the driving assembly is arranged in the handle shell and can move along the rotary grinding guide wire, the driving assembly is used for driving a driving shaft to rotate around the rotary grinding guide wire, and the driving shaft is sleeved on the rotary grinding guide wire;

the first telescopic guide piece is arranged along the guide wire cavity and is provided with a first guide channel, the driving shaft and the rotary grinding guide wire movably penetrate through the first guide channel, the far end of the first telescopic guide piece is connected with the handle shell, the first telescopic guide piece is in linkage connection with the driving assembly, and when the driving assembly and the driving shaft move along the rotary grinding guide wire, the first telescopic guide piece performs telescopic motion in the handle shell.

On the other hand, the utility model provides a rotational grinding system which comprises the driving handle, a rotational grinding guide wire and a rotational grinding catheter, wherein the rotational grinding guide wire is arranged in the guide wire cavity in a penetrating manner, the near end of the rotational grinding guide wire extends out of the near end of the guide wire cavity, the rotational grinding catheter is sleeved on the rotational grinding guide wire, and the near end of the rotational grinding catheter is connected with the far end of the driving shaft.

The driving handle comprises a handle shell, a driving assembly and a first telescopic guide part, wherein the first telescopic guide part is in linkage connection with the driving assembly, when the driving assembly and a driving shaft move along a rotational grinding guide wire, the first telescopic guide part moves in the handle shell in a telescopic mode, so that the movement of the driving assembly along the rotational grinding guide wire is not interfered, the requirement that the driving assembly drives a rotational grinding guide pipe to move along the rotational grinding guide wire by enough stroke is met, and the first guide channel of the first telescopic guide part can play the radial supporting and axial guiding roles on the driving shaft, the rotational grinding guide wire and other structures penetrating in the first telescopic guide part, so that a large-scale operation platform is not required to maintain the axial movement guiding of the structures such as the rotational grinding guide wire or the rotational grinding guide pipe, and the operation portability of the driving handle is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings of the embodiments can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a rotational atherectomy system in accordance with one embodiment;

FIG. 2 is a schematic view of an internal structure of a drive handle of an embodiment of the rotational atherectomy system;

FIG. 3 is a schematic view of the telescoping arrangement of the first telescoping guiding element and the second telescoping guiding element during movement of the drive assembly in the drive handle of one embodiment of the rotational atherectomy system;

FIG. 4 is a schematic view of a telescoping guide in the drive handle of one embodiment of the rotational atherectomy system;

FIG. 5 is a partially enlarged schematic view of a portion A of the telescopic guide structure shown in FIG. 4;

FIG. 6 is a cross-sectional structural view of a portion of a drive handle of an embodiment of the rotational atherectomy system.

The reference numbers illustrate: 100. a rotational milling system; 10. a drive handle; 10a, a guide wire cavity; 11. a handle housing; 11a, a first housing; 11b, a second housing; 111. a first support section; 112. a second support portion; 113. a third support portion; 114. a fourth support portion; 12. a drive assembly; 13. a telescoping guide; 13A, a first telescopic guide; 13B, a second telescoping guide; 131. a sleeve; 131a, a first sleeve; 131b, a second sleeve; 132. a rolling member; 1311. a first limiting part; 1312. a second limiting part; 1313. a third limiting part; 133. a lubricious coating; 134. a liquid through hole; 14. a lock wire assembly; 15. a track; 20. spinning and grinding the guide wire; 30. rotationally grinding the conduit; 31. a rotary grinding head; 32. a flexible transmission shaft.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It should be noted that "proximal" and "distal" are used as terms of orientation, which are commonly used in the field of interventional medical devices, wherein "proximal" refers to the end of the device that is closer to the operator and "distal" refers to the end of the device that is farther from the operator, for example, in the rotational atherectomy system 100 shown in fig. 1, the left end of the drive handle 10 is the proximal end of the drive handle 10, and the right end of the drive handle 10 is the distal end of the drive handle 10.

In an embodiment of the utility model, the axial direction refers to a direction parallel to a line connecting the center of the distal end and the center of the proximal end of the medical device; radial refers to a direction perpendicular to the above-mentioned axial direction.

Referring to fig. 1 and 2, the present invention provides a rotational atherectomy system 100 comprising a drive handle 10, a rotational atherectomy wire 20, and a rotational atherectomy catheter 30. The proximal ends of both the atherectomy guidewire 20 and the atherectomy catheter 30 are connected to the drive handle 10. The atherectomy guidewire 20 serves as a structural element for establishing a pathway in the body for guiding the atherectomy catheter 30 into the blood vessel at the location where the atherectomy is desired. Specifically, the rotational atherectomy catheter 30 is sleeved on the rotational atherectomy guide wire 20, and the rotational movement of the rotational atherectomy catheter 30 around the rotational atherectomy guide wire 20 and the movement of the rotational atherectomy catheter 30 along the rotational atherectomy guide wire 20 can be achieved by operating the drive handle 10, such that the rotational atherectomy catheter 30 is guided by the rotational atherectomy guide wire 20. It should be noted that, in the present invention, for an elongated structural member, reference to movement of one structural member along another structural member means movement of the one structural member along an axial direction of the another structural member. Taking the example of the rotational atherectomy catheter 30 moving along the rotational atherectomy guidewire 20, the rotational atherectomy catheter 30 moves along the rotational atherectomy guidewire 20, i.e., the rotational atherectomy catheter 30 moves along the axial direction of the rotational atherectomy guidewire 20.

The utility model discloses the people discovers, grinds pipe 30 soon can influence the fine or bad of mill effect along the stroke of grinding seal wire 20 axial displacement soon. For example, the axial movement stroke of the rotational atherectomy catheter 30 along the rotational atherectomy guide wire 20 is not enough, and when the driving handle 10 is operated to control the rotational atherectomy catheter 30 to perform the rotational atherectomy, the axial movement displacement of the rotational atherectomy guide wire 20 is too small to open the affected blood vessel, which requires a longer axial movement stroke of the rotational atherectomy catheter 30 relative to the rotational atherectomy guide wire 20. However, when the driving handle 10 is provided with a long guide rail to meet the requirement of adjusting the axial movement stroke of the rotational grinding catheter 30, the whole structure of the driving handle 10 is heavy, a large operation platform needs to be provided, and the operation convenience is poor. Utility model people are constantly exploring, improve actuating handle 10's structure, satisfy grind pipe 30 soon and along grinding seal wire 20 under the condition of the ascending motion stroke of axial for actuating handle 10 is light, easily controls to grind pipe 30 soon and grinds the operation.

Specifically, drive handle 10 includes a handle housing 11, a drive assembly 12, and a telescoping guide 13. The handle housing 11 is intended to be held by an operator for rotational manipulation. The handle housing 11 has a guidewire lumen 10a, the guidewire lumen 10a extending through the proximal end of the drive handle 10 and the distal end of the drive handle 10, the guidewire lumen 10a being for passage of a rotational atherectomy guidewire 20. Referring to fig. 1, a rotational atherectomy wire 20 is disposed through the guidewire lumen 10a, with a proximal end 20a of the rotational atherectomy wire 20 extending proximally of the guidewire lumen 10a and a distal end 20b of the rotational atherectomy wire 20 extending distally of the guidewire lumen 10 a. Understandably, the atherectomy guidewire 20 may be moved along the guidewire lumen 10a to thread the atherectomy guidewire 20 into the blood vessel and to guide the atherectomy catheter 30 to move axially within the blood vessel.

A drive assembly 12 is disposed within the handle housing 11 and is used to drive a drive shaft (not shown) in rotation about the rotational atherectomy guide wire 20. Specifically, the driving shaft is sleeved on the rotational grinding guide wire 20, and under the driving of the driving assembly 12, the driving shaft rotates around the rotational grinding guide wire 20 and drives the rotational grinding catheter 30 to rotate around the rotational grinding guide wire 20, so as to realize the rotational grinding operation of the rotational grinding catheter 30.

The driving assembly 12 can move in the handle housing 11 along the rotational atherectomy guide wire 20, so that the rotational atherectomy catheter 30 connected with the driving assembly 12 can also move along the rotational atherectomy guide wire 20 along with the driving assembly 12, and then when the rotational atherectomy catheter 30 is used for abrading the atherosclerotic plaques in the diseased blood vessels, the rotational atherectomy catheter 30 can move back and forth in the blood vessels while rotating, so as to remove calcified or fibrotic atherosclerotic plaques and open blood vessels blocked by the plaques.

The telescopic guide 13 is arranged along the guide wire cavity 10a, the telescopic guide 13 is in linkage connection with the driving assembly 12, and when the driving assembly 12 and the driving shaft move along the rotational grinding guide wire 20, the telescopic guide 13 moves in a telescopic mode in the handle shell 11. The telescoping guide 13 can provide support for an elongate member, such as a atherectomy guide wire 20 or an atherectomy catheter 30, within the guide wire lumen 10a during telescoping movement. Specifically, flexible guide 13 is formed with the guide way, and the guide way plays the effect of radial support and axial guide to the structure of locating in it to wearing, and wherein, radial support indicates can play the bearing effect in footpath to make the structure of wearing to locate in the guide way can not produce big complete, correspondingly, axial guide indicates that the guide way can supply to wear to locate the structure in it along axial displacement, thereby the guide effect is played to the structure of locating in it to the guide way.

Since the telescopic guide 13 can move telescopically and can play the role of radial support and axial guidance for the structure penetrating the guide channel when the driving assembly 12 moves along the rotational grinding guide wire 20 together with the driving shaft, the driving handle 10 does not need to be equipped with a large-scale operation platform to maintain the axial movement guidance of the structure such as the rotational grinding guide wire 20 or the rotational grinding guide pipe 30. Moreover, because the telescoping guide member 13 can move telescopically, it does not interfere with the movement of the drive assembly 12 along the atherectomy guide wire 20, and the drive assembly 12 with the atherectomy catheter 30 can move along the atherectomy guide wire 20 for a sufficient distance. Based on this, the arrangement of the telescopic guide 13 effectively improves the operational convenience of the driving handle 10.

The installation position of the telescopic guide 13 in the handle case 11 is different, and the elements of the guide passage provided through the telescopic guide 13 are different, so that the objects to be supported and guided by the telescopic guide 13 are different.

The structure of the drive handle 10 will be further explained below with respect to the structural arrangement of the telescopic guides 13 in the handle housing 11, respectively.

As shown in connection with fig. 1 and 2, both the proximal side of drive assembly 12 and the distal side of drive assembly 12 are provided with telescoping guides 13. For convenience of description, the telescopic guide 13 located on the distal end side of the driving assembly 12 is referred to as "first telescopic guide 13A", the telescopic guide 13 located on the proximal end side of the driving assembly 12 is referred to as "second telescopic guide 13B", and accordingly, the guide passage formed by the first telescopic guide 13A is referred to as "first guide passage", and the guide passage formed by the second telescopic guide 13B is referred to as "second guide passage". As shown in connection with fig. 3, a first telescoping guide 13A and a second telescoping guide 13B are connected to a distal side of drive assembly 12 and a proximal side of drive assembly 12, respectively. When the driving assembly 12 moves distally in the handle housing 11, the first telescopic guide 13A contracts and the second telescopic guide 13B extends; as drive assembly 12 moves proximally within handle housing 11, first telescoping guide 13A extends and second telescoping guide 13B retracts. In this embodiment, the distal end of the first telescopic guiding element 13A is connected to the handle housing 11, the proximal end of the first telescopic guiding element 13A is connected to the driving assembly 12, and the rotational grinding guide wire 20 and the driving shaft sleeved on the rotational grinding guide wire 20 are inserted into the first guiding channel of the first telescopic guiding element 13A, so as to utilize the first telescopic guiding element 13A to radially support and axially guide the driving shaft and the rotational grinding guide wire 20 located in the driving shaft.

The distal end of the second telescopic guide 13B is connected to the driving assembly 12, and the proximal end of the second telescopic guide 13B is connected to the handle housing 11, so that the second telescopic guide 13B is driven to perform telescopic movement when the driving assembly 12 moves axially in the handle housing 11. The near-end of drive shaft is connected with drive assembly 13, and the near-end of the seal wire 20 of grinding soon is worn out and is worn to locate the second guide way of the flexible guide of second 13B from the near-end of drive shaft to utilize this flexible guide of second 13B can play the effect of radial support and axial guide to the part that the seal wire 20 of grinding soon stretches out the near-end of drive shaft, thereby make the seal wire 20 of grinding soon difficult to crooked to deviating from the circumferential direction, ensure the stability of grinding seal wire 20 soon.

It should be noted that the first telescopic guide 13A and the second telescopic guide 13B do not necessarily have to be present at the same time, and rather, one of them is removed and the other can still exert the corresponding action. For example, in some embodiments, the driving handle 10 is provided with a first telescopic guide 13A, specifically, a distal end of the first telescopic guide 13A is connected with the handle housing 11, and a proximal end of the first telescopic guide 13A is connected with the driving assembly 12, so that the first telescopic guide 13A is linked with the driving assembly 12, so that the driving assembly 12 can drive the first telescopic guide 13A to move telescopically when the driving assembly 12 moves axially relative to the handle housing 11. Because the drive shaft wears to locate first guide way to the in-process of first flexible guide 13A concertina movement can play radial support and the effect of axial guide to drive shaft and the grinding seal wire 20 that is located the drive shaft soon, thereby makes grinding seal wire 20 and drive shaft maintain good axiality soon and be difficult to deviating from the circumferential direction and crooked, ensures the stability of grinding the operation soon. It should be noted that the proximal end of the first telescoping guiding element 13A can be connected to the driving assembly 12 to realize a linkage connection therebetween. In some embodiments, the first telescopic guide 13A may also be disposed through the driving assembly 12 to realize a linkage connection with the driving assembly 12. Specifically, drive assembly 12 is worn to establish by first flexible guide 13A, make the near-end side of first flexible guide 13A stretch out from drive assembly 12's near-end side, thereby can utilize the part that first flexible guide 13A stretches out drive assembly 12's near-end side to come to support the direction to the part that grinds seal wire 20 soon that is close to drive assembly 12's near-end side, and thus, first flexible guide 13A not only can realize supporting the drive shaft and the grind seal wire 20 soon that is located the drive shaft in drive assembly 12's distal end side, and simultaneously, can also support the partial structure that lies in the grind seal wire 20 soon of drive assembly 12's near-end side, further make grind seal wire 20 overall stability soon, so that grind seal wire 20 and guide the mill pipe 30 soon and grind steadily, improve and grind stability soon.

When 2 or more than 2 telescopic guides 13 are provided in the handle case 11 of the driving handle 10, the structures of the telescopic guides 13 may be the same or different. As shown in fig. 3, in some embodiments, when the first telescopic guide 13A and the second telescopic guide 13B take the same structure, the first telescopic guide 13A and the second telescopic guide 13B are different in size.

The structure of the telescopic guide 13 will be described below, and the structure of the first telescopic guide 13A may be any one of the lower telescopic guides 13, and the structure of the second telescopic guide 13B may be any one of the lower telescopic guides 13.

Specifically, as shown in fig. 3, the telescopic guide 13 includes 2 or more than 2 sleeves 131, and the 2 or more than 2 sleeves 131 are sleeved with each other and can relatively move in a telescopic manner along the axial direction.

In order to further understand the structure of the telescopic guide 13, the structure of the telescopic guide 13 will be further described below by taking the telescopic guide 13 comprising a first sleeve 131a and a second sleeve 131b sleeved on the first sleeve 131a as an example.

As shown in fig. 4, a rolling member 132 is disposed between the first sleeve 131a and the second sleeve 131b which are nested with each other, and specifically, the rolling member 132 is loaded between an outer wall of the first sleeve 131a and an inner wall of the second sleeve 131 b. When the first sleeve 131a and the second sleeve 131b relatively move telescopically along the axial direction, the rolling member 132 rolls between the outer wall of the first sleeve 131a and the inner wall of the second sleeve 131b, and the rolling member 132 is used to improve the smoothness of the telescopic movement of the first sleeve 131a and the second sleeve 131b relative to each other.

It should be noted that, in the embodiment that the telescopic guide 13 includes 2 or more than 2 sleeves 131, a rolling member 132 is disposed between any two adjacent 2 sleeves 131, and when the telescopic guide 13 performs telescopic movement, the rolling member 132 is in rolling contact with the corresponding sleeve 131, so that the rolling member 132 is utilized to reduce sliding friction between the sleeves 131, improve smoothness of the telescopic movement between the sleeves 131, and enable the telescopic guide 13 to perform telescopic movement flexibly as a whole.

In order to improve the motion stability of the rolling members 132 during the telescopic motion of the telescopic guide 13 and avoid the rolling members 132 from being randomly disturbed to influence the sliding assisting effect, a limiting structure is arranged between the adjacent sleeves 131 to limit the motion area of the rolling members 132 by the limiting structure. Referring to fig. 4, taking the structure between the first sleeve 131a and the second sleeve 131b as an example, a first position-limiting portion 1311 and a second position-limiting portion 1312 are formed at one side of the inner wall of the second sleeve 131b, and the rolling member 132 is positioned in the region Q defined between the first position-limiting portion 1311 and the second position-limiting portion 1312, so that the rolling member 132 does not slip out from between the first sleeve 131a and the second sleeve 131 b.

As shown in fig. 4 and 5, a third limiting portion 1313 is formed at one end of the first sleeve 131a, and the third limiting portion 1313 is configured to abut against the first limiting portion 1311 to limit the maximum extension length of the first sleeve 131a relative to the second sleeve 131 b.

The first stopper 1311 may be an annular projection surrounding the axial direction of the second sleeve 131 b. For example, the tube wall of the second sleeve 131b is pressed inward, so that a part of the tube wall of the second sleeve 131b is recessed to form an annular protrusion, which is convenient for machining.

The second stopper 1312 may have the same structure as the first stopper 1311. In some embodiments, the structure of the second stopper 1312 may also be different from that of the first stopper 1311. For example, the second position-limiting portion 1312 is formed at one end of the second sleeve 131b, through which the first sleeve 131a extends, and specifically, the second position-limiting portion 1312 is formed by bending the pipe wall of the second sleeve 131b corresponding to the end inward. For another example, the second position-limiting portion 1312 and the second sleeve 131b are separate structures, and specifically, an annular blocking piece may be connected to an end of the second sleeve 131b, so that the annular blocking piece forms the second position-limiting portion 1312. Understandably, the diameter of the inner ring of the annular flap is adapted to the outer diameter of the first sleeve 131a, so that the first sleeve 131a can movably extend from the inner ring of the annular flap into the second sleeve 131 b. The ring-shaped flap may be connected to the second sleeve 131b by welding, glue connection, or screw connection, which is not limited herein.

The third position-limiting portion 1313 may be formed by a partial structure of the pipe wall of the first sleeve 131a expanding outward. For example, as shown in fig. 4 and 5, when the third position-limiting portion 1313 formed by outward expansion of the tube wall of the end portion of the first sleeve 131a is in a bell shape, and the first sleeve 131a axially moves in the second sleeve 131b to make the third position-limiting portion 1313 contact with the first position-limiting portion 1311, the first sleeve 131a reaches the maximum length extending from the second sleeve 131b, and the first sleeve 131a cannot continue to extend from the second sleeve 131 b. In other embodiments, the third position-limiting portion 1313 may be a protrusion formed on an outer wall of the first sleeve 131a, and is not limited thereto.

It should be noted that, since the rolling element 132 is constrained between the first limiting portion 1311 and the second limiting portion 1312, and the third limiting portion 1313 abuts against the first limiting portion 1311, the first sleeve 131a can be limited to continue to extend out from the second sleeve 131b, so that there are tube sections nested with each other between the first sleeve 131a and the second sleeve 131b all the time, which is beneficial to ensuring the coaxiality of the first sleeve 131a and the second sleeve 131b, and improving the stability of the relative telescopic movement of the first sleeve 131a and the second sleeve 131 b.

In some embodiments, the third stop 1313 abuts the first stop 1311 to limit the first sleeve 131a from continuing to extend from the second sleeve 131b when the first sleeve 131a and the second sleeve 131b are in the maximum extension position, and the length of the pipe segment between which the first sleeve 131a and the second sleeve 131b are nested is 2cm to 5cm, such as 2cm, 3cm, 4cm or 5 cm. Controlling the length of the tube segment that is nested within the first sleeve 131a and the second sleeve 131b to be within the range of 2cm to 5cm ensures good alignment of the first sleeve 131a and the second sleeve 131b, while avoiding excessive length of the tube segment that is nested within one another, so as to achieve as long a telescoping stroke as possible between the first sleeve 131a and the second sleeve 131 b.

The length of the pipe sections nested in each other can be understood as the distance between the first stopper portion 1311 and the second stopper portion 1312, regardless of design errors and assembly errors between structures, based on the position of the first sleeve 131a passing through the second sleeve 131b corresponding to the second stopper portion 1312.

It should be noted that the first sleeve 131a and the second sleeve 131b are cylindrical pipes, but the inner walls are not limited to be cylindrical, for example, in some embodiments, a first abutting surface and a second abutting surface are correspondingly formed on the first sleeve 131a and the second sleeve 131b, both the first abutting surface and the second abutting surface are planes parallel to the axial direction of the telescopic guide 13, the first abutting surface and the second abutting surface are parallel to each other, and the rolling member 132 rolls and abuts against the first abutting surface and the second abutting surface.

The rolling elements 132 are preferably spherical balls or cylindrical balls.

As shown in fig. 4, the outer wall of the first sleeve 131a and/or the inner wall of the second sleeve 131b is provided with a lubricating coating 133, and the rolling members 132 are in contact with the lubricating coating 133 to improve the smoothness of the first sleeve 131a and the second sleeve 131b under rolling support of the rolling members 132. The material of the lubricant coating 133 is preferably polytetrafluoroethylene grease.

As shown in fig. 5, the wall of the first sleeve 131a is opened with a fluid hole 134, and the fluid hole 134 is used for the fluid to flow to the rolling member 132. It should be noted that the liquid that can be introduced into the liquid passage hole 134 at the position of the rolling member 132 may be cooling liquid or lubricating liquid.

For example, in some embodiments, the fluid holes 134 may introduce a cooling fluid to the locations of the rolling members 132 to cool the rolling members 132. Further, the handle housing 11 is formed with a reservoir chamber near the proximal end to store a cooling fluid.

For another example, in some embodiments, the lubricant may be introduced to the position of the rolling member 132 through the liquid passage hole 134, so as to reduce friction during the movement by using the lubricating effect of the lubricant, so that the rolling member 132 can slide or roll smoothly along with the telescopic movement of the telescopic guide 13, thereby reducing the occurrence of the clamping stagnation, and improving the operation feeling of the operator and the flexibility of moving the driving assembly 12 in the axial direction.

In some embodiments, a support portion for supporting the telescopic guide 13 is provided inside the handle housing 11. One or more support portions may be provided, and for example, 2 or more support portions may be provided in the handle case 11.

For the sake of easy understanding, the arrangement of the support portion of the handle case 11 will be further described below by taking as an example the first telescopic guide 13A and the second telescopic guide 13B provided in the handle case 11.

As shown in fig. 2, a first supporting portion 111 and a second supporting portion 112 are provided in the handle case 11, and the first supporting portion 111 and the second supporting portion 112 are provided at an interval in the axial direction of the handle case 11 and support the first telescopic guide 13A. The first telescopic guide 13A is kept set along the guide wire chamber 10a of the handle housing 11 by the first support portion 111 and the second support portion 112.

A third support portion 113 and a fourth support portion 114 are provided in the handle housing 11, and the third support portion 113 and the fourth support portion 114 are provided at intervals in the axial direction of the handle housing 11 and support the second telescopic guide 13B. The second telescopic guide 13B is kept disposed along the guide wire chamber 10a of the handle housing 11 by the third support portion 113 and the fourth support portion 114.

The supporting portion may be a part of the structure of the handle housing 11, for example, the supporting portion is a rib plate protruding from the inner wall of the handle housing 11, and a hole for the corresponding telescopic guide 13 to pass through is formed on the rib plate, and it can be understood that the hole is located on the axis of the guide wire chamber 10a, so that the telescopic guide 13 passing through the hole is located along the guide wire chamber 10 a. In some embodiments, after the flexible guide piece 13 wears to locate the hole, utilize glue to be connected fixedly with the gusset, the gusset not only can play the supporting role to flexible guide piece 13 like this, also play limiting displacement to the position that is connected with the gusset of flexible guide piece 13, improve the stability of being connected between flexible guide piece 13 and the gusset, thereby be favorable to flexible guide piece 13 to carry out the stable support direction to the structure of wearing locating in it when the telescopic motion in handle housing 11.

Referring to fig. 6, the handle housing 11 includes a first housing 11a and a second housing 11b, the first housing 11a and the second housing 11b may be connected by a snap connection, or may be connected by a connecting member such as a screw or a bolt, and the driving assembly 12 and the telescopic guide 13 in the driving handle 10 may be conveniently assembled into the handle housing 11 by combining the first housing 11a and the second housing 11 b.

In the embodiment that the supporting portion is a rib plate protruding from the inner wall of the handle housing 11, rib plates are arranged at corresponding positions of the inner walls of the first housing 11a and the second housing 11b, grooves are formed in the rib plates, and after the first housing 11a and the second housing 11b are matched, the grooves in the oppositely-arranged rib plates are closed to form a hole for penetrating the telescopic guide member 13. With this arrangement, when the telescopic guide 13 is installed, the telescopic guide 13 can be installed into the groove of the first housing 11a or the second housing 11b along the guide wire chamber 10a, and then the first housing 11a and the second housing 11b are fastened together, so that the installation of the telescopic guide 13 can be completed.

In some embodiments, as shown in connection with fig. 2, the drive handle 10 includes a lock wire assembly 14, the lock wire assembly 14 being disposed within the handle housing 11 and on a proximal side of the drive assembly 12. In this embodiment, the wire locking assembly 14 is used to lock the rotational grinding guide wire 20 inserted into the guide wire cavity 10a, so that during the rotational grinding process, the rotational grinding guide wire 20 will not move axially or rotate axially along with the rotational grinding guide tube 30, so that the rotational grinding guide wire 20 stably guides the rotational grinding guide tube 30 to perform rotational grinding, and the rotational grinding stability is improved. The structure of the locking wire assembly 14 is not limited herein, and the locking wire assembly 14 may be specifically a clip, or a jack screw inserted into the handle housing 11, as long as the locking wire assembly 14 can fix the rotational atherectomy guide wire 20 relative to the handle housing 11 when necessary.

In embodiments where the actuation handle 10 includes a locking wire assembly 14, the proximal end of the second telescoping guide 13B may be pulled with the locking wire assembly 14. Specifically, the proximal end of the second telescoping guiding element 13B is connected to the locking wire assembly 14, and the distal end of the second telescoping guiding element 13B is connected to the drive assembly 12. Therefore, when the driving assembly 12 moves axially in the handle shell 11, the driving assembly 12 is close to or far from the lock wire assembly 14, so that the second telescopic guide piece 13B between the driving assembly 12 and the lock wire assembly 14 is stretched or compressed, and then the telescopic movement of the second telescopic guide piece 13B along with the axial movement of the driving assembly 12 is realized, and the length of the driving handle 10 is reduced as much as possible while the requirement of the axial movement stroke of the driving assembly 12 and the rotational grinding conduit 30 is met, so that the rotational grinding operation of the driving handle 10 can be operated easily.

Referring again to fig. 1, the rotational atherectomy catheter 30 includes a rotational head 31, a flexible drive shaft 32, and a sheath (not shown). The rotational head 31 is olive shaped and the distal portion of the rotational head 31 may be provided with particles for increasing friction, for example, diamond particles of 20 to 30 microns in size. Therefore, when the rotational grinding head 31 is used for grinding the arteriosclerosis plaque in the diseased blood vessel, the particulate matters at the distal part of the rotational grinding head also have a good grinding effect.

The rotational head 31 can be driven by a transmission flexible shaft 32. Specifically, the rotational head 31 is connected to a distal end of a flexible transmission shaft 32, and a proximal end of the flexible transmission shaft 32 is connected to a distal end of the driving shaft, so that when the driving assembly 12 drives the driving shaft to rotate, the driving shaft drives the rotational head 31 to rotate via the flexible transmission shaft 32. In some embodiments, a distal end of the driving shaft is provided with a first engaging portion (not shown), a proximal end of the flexible transmission shaft 32 is provided with a second engaging portion (not shown) for engaging with the first engaging portion, and the flexible transmission shaft 32 and the driving shaft are connected by the engagement of the first engaging portion and the second engaging portion, so that the driving shaft can drive the flexible transmission shaft 32 to move. Furthermore, a limit sleeve can be sleeved on the driving shaft or the transmission flexible shaft 32, and after the first meshing portion is matched with the second meshing portion, the limit sleeve is pushed to the position covering the first meshing portion and the second meshing portion along the axial direction to limit the separation of the first meshing portion and the second meshing portion, so that the connection stability between the driving shaft and the transmission flexible shaft 32 is improved.

With continued reference to FIG. 1, in some embodiments, a track 15 is provided within the handle housing 11 for supporting the drive assembly 12 to facilitate improving the stability of the axial movement of the drive assembly 12 within the handle housing 11. After adjusting the axial position of the driving assembly 12 within the handle housing 11, the rotational atherectomy catheter 30, which is connected to the driving assembly 12 via a drive shaft, can be moved within the vessel to abrade the arteriosclerotic plaque within the diseased vessel and ultimately open the vessel.

The transmission flexible shaft 32 is a flexible pipe fitting, and a lumen of the transmission flexible shaft 32 can be penetrated by the rotational grinding guide wire 20, so that the rotational grinding head 31 can be conveniently pushed to a position needing rotational grinding along the rotational grinding guide wire 20 by using the transmission flexible shaft 32. During rotational abrasion, when the driving assembly 12 moves axially in the handle housing 11, the flexible driving shaft 32 can move axially along with the driving shaft to drive the rotational head 31 to move along the rotational abrasion guide wire 20 in the affected blood vessel (for example, the distance of each back and forth movement is controlled within 4 cm) so as to perform gradual abrasion on the arteriosclerotic plaque. It can be understood that, in the rotational grinding process, when the rotational grinding head 31 is slightly resistant to the arteriosclerotic plaque, the rotational grinding head 31 can be pushed towards the far end through the transmission flexible shaft 32, so that the rotational grinding head 31 can be conveniently kept in good contact with the arteriosclerotic plaque, and the grinding effect is ensured. Of course, it is not necessary to say that the rotating head 31 is always in contact with the arteriosclerotic plaque, and in order to avoid that the rotating head 31 stays in the same portion of the diseased blood vessel for too long to damage the tissue at that local position, it is preferable to withdraw the rotating head 31 proximally after a certain time of rotation. For example, each rotational abrasion for 25 seconds, the rotational head 31 is withdrawn proximally to clear the atherosclerotic plaque. Therefore, the problem that the rotary grinding head 31 is easy to scald after long-time rotary grinding and is not beneficial to chip release in the rotary grinding process so as to easily cause thrombus is avoided.

The sheath tube can be made of polytetrafluoroethylene materials. The sheath pipe cover is established in the outside of transmission flexible axle 32 to this avoids the rotational abrasion in-process, and transmission flexible axle 32 causes the damage to the vascular wall, then the sheath pipe can play the effect of protection vascular wall. In addition, at the rotational grinding in-process, can also pour into the washing liquid into to the rotational grinding position department through the sheath pipe to reduce friction damage and heat damage, and can utilize the washing liquid in time to wash away the granule that drops at the rotational grinding in-process, avoid causing the blood stream embolism. The cleaning solution may be physiological saline.

In some embodiments, the rotational atherectomy guidewire 20 may be made of a stainless steel material. The diameter and length of the rotational atherectomy guidewire 20 are not limited, as long as the rotational atherectomy procedure can be performed. For example, the length of the rotational milled guidewire 20 is 300 cm. The material and specification of the rotational milled guide wire 20 are not limited herein.

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.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the utility model, and these changes and modifications are all within the scope of the utility model. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An actuating handle, comprising:

2. The actuating handle according to claim 1, wherein said first telescoping guiding member comprises 2 or more than 2 tubes, and 2 or more than 2 said tubes are nested within each other and are capable of relative telescoping movement in the axial direction.

3. The actuating handle of claim 2 wherein a roller is disposed between any adjacent 2 of said sleeves, said roller being in rolling contact with a respective one of said sleeves upon telescopic movement of said first telescoping guiding member.

4. The actuating handle of claim 2 wherein said first telescoping guiding member comprises a first sleeve and a second sleeve disposed around said first sleeve, a roller member being carried between an outer wall of said first sleeve and an inner wall of said second sleeve, said roller member rolling between an outer wall of said first sleeve and an inner wall of said second sleeve upon relative telescoping movement of said first sleeve and said second sleeve in an axial direction.

5. The driving handle according to claim 4, wherein the first sleeve and the second sleeve are correspondingly formed with a first abutting surface and a second abutting surface, the first abutting surface and the second abutting surface are both planes parallel to an axial direction of the first telescopic guiding member, the first abutting surface and the second abutting surface are parallel to each other, and the rolling member rolls and abuts against the first abutting surface and the second abutting surface.

6. The actuating handle of claim 4 wherein the outer wall of said first sleeve and/or the inner wall of said second sleeve is provided with a lubricious coating, said rolling elements being in contact with said lubricious coating.

7. The actuating handle of claim 6 wherein the wall of the first sleeve defines a fluid aperture for fluid flow to the roller.

8. The driving handle according to claim 4, wherein a first position-limiting portion and a second position-limiting portion are formed on a side of the inner wall of the second sleeve, and the rolling member is positioned between the first position-limiting portion and the second position-limiting portion.

9. The driving handle according to claim 8, wherein a third limiting portion is formed at one end of the first sleeve, and the third limiting portion is used for abutting against the first limiting portion to limit the limit telescopic length of the first sleeve relative to the second sleeve.

10. The drive handle of claim 1, wherein the proximal end of the first telescoping guiding element is connected to the drive assembly or the first telescoping guiding element is disposed through the drive assembly such that the proximal end of the first telescoping guiding element extends from the proximal side of the drive assembly.

11. The actuating handle of claim 1, comprising a second telescoping guide, a proximal end of the second telescoping guide being coupled to the handle housing and defining a second guide channel disposed along the guidewire lumen, the atherectomy guidewire being movably disposed through the second guide channel, the first telescoping guide and the second telescoping guide being coupled to a proximal side of the actuating assembly and a distal side of the actuating assembly, respectively, wherein the first telescoping guide contracts when the actuating assembly is moved distally within the handle housing, the second telescoping guide expands, and the first telescoping guide expands and the second telescoping guide contracts when the actuating assembly is moved proximally within the handle housing.

12. The drive handle of claim 11, wherein the second telescoping guide is identical in construction to the first telescoping guide.

13. A rotational atherectomy system comprising the drive handle of any of claims 1-12, and a rotational atherectomy guide wire and a rotational atherectomy catheter, wherein the rotational atherectomy guide wire is inserted through the guide wire lumen and the proximal end of the rotational atherectomy guide wire extends out of the proximal end of the guide wire lumen, the rotational atherectomy catheter is sheathed on the rotational atherectomy guide wire, and the proximal end of the rotational atherectomy catheter is connected to the distal end of the drive shaft.