CN217162228U

CN217162228U - Rotary grinding system and rotary grinding control handle thereof

Info

Publication number: CN217162228U
Application number: CN202123098522.4U
Authority: CN
Inventors: 赵承; 黄飞虎; 孔令娟; 姬庆茹; 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: 2022-08-12
Anticipated expiration: 2031-12-10

Abstract

The utility model relates to a grind system soon and grind brake valve lever soon thereof, grind brake valve lever soon and include handle casing and lock silk structure, and this lock silk structure includes closure seat, closure piece and electromagnetic component, and the closure piece sets up with the closure seat relatively, and can relative motion, and electromagnetic component is used for ordering about closure piece and closure seat clamp and grinds the seal wire soon. The utility model discloses a grind system soon and grind brake valve lever soon thereof orders about locking piece and closure seat clamp when the circular telegram and wears to locate to grind the seal wire soon with electromagnetic component for grind the seal wire soon and be difficult to relative handle casing in grinding the operation soon and appear becoming flexible, grind the pipe soon in order to effectively guide to grind to lead and stabilize and grind soon, improved and ground the effect soon.

Description

Rotary grinding system and rotary grinding control handle thereof

Technical Field

The utility model relates to an intervene medical treatment technical field, especially relate to a grind system soon and grind brake valve lever soon thereof.

Background

In the medical field, rotational atherectomy has become an indispensable treatment for percutaneous Peripheral Arterial Intervention (percutaneous Peripheral Intervention). The principle of the rotational grinding operation is that calcified or fibrous arteriosclerosis plaques are removed through high-speed rotational grinding of a rotational grinding head at a vascular lesion, so that blood vessels blocked by the arterial plaques are opened, a smooth blood vessel inner cavity is obtained, and subsequent medical equipment such as a balloon or a stent system can conveniently pass through a lesion area.

During the rotational abrasion treatment, it is usually necessary to guide the rotational abrasion guide wire into the distal segment of the lesion and to send the rotational abrasion head and the driving shaft to the proximal position of the lesion along the rotational abrasion guide wire. During the rotational grinding, the rotational grinding head is slightly pushed along the rotational grinding guide wire and can move back and forth (pushing and withdrawing) at the pathological part, so that the curative effect of the rotational grinding is improved, complications can be reduced, and the long retention time of the rotational grinding head at the same part is avoided.

However, during the process of the rotational grinding head, the proximal end of the rotational grinding guide wire is easy to loosen, which affects the supporting and guiding effect of the rotational grinding head, and results in poor rotational grinding effect.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a rotational atherectomy control handle and a rotational atherectomy system including the same, which address the problem of poor rotational atherectomy performance.

On the one hand, the embodiment of the utility model provides a grind brake valve lever soon, include:

the handle shell is provided with a handle inner cavity, and a rotational grinding guide wire can pass through the handle inner cavity;

the locking structure is arranged in the handle shell and comprises a locking seat, a locking block and an electromagnetic assembly, the locking block is arranged opposite to the locking seat and can move relatively, and the electromagnetic assembly is used for driving the locking block and the locking seat to clamp and penetrate through the spin grinding guide wire in the inner cavity of the handle.

In one embodiment, the locking block and the locking seat can move relatively to a locking state and an unlocking state, wherein in the locking state, the locking seat and the locking block clamp the rotational atherectomy guide wire, and in the unlocking state, the locking seat and the locking block unlock the rotational atherectomy guide wire; the electromagnetic assembly generates magnetic attraction when being electrified, so that the locking block and the locking seat move relatively to a locking state, and when the electromagnetic assembly is powered off, the locking block and the locking seat are in an unlocking state.

In one embodiment, an elastic member is arranged between the locking block and the locking seat, and when the electromagnetic assembly is powered off, the elastic member drives the locking block and the locking seat to move towards directions away from each other.

In one embodiment, the electromagnetic assembly comprises an electromagnet and a magnet which are oppositely arranged, the electromagnet is arranged on one of the locking block and the locking seat, and the magnet is arranged on the other of the locking block and the locking seat.

In one embodiment, a first groove is formed in one side, facing the locking block, of the locking seat, a second groove is formed in one side, facing the locking seat, of the locking block, when the locking block and the locking seat clamp the spinning guide wire, the second groove and the first groove are combined to form a guide wire cavity, and the spinning guide wire penetrates through and is positioned in the guide wire cavity.

In one embodiment, an arithmetic mean deviation (Ra) of the profile of the sidewall of at least one of the second groove and the first groove is greater than 25 μm.

In one embodiment, the portable grinding device comprises a driving assembly and a telescopic guide piece, wherein the driving assembly is used for driving a grinding catheter to move, the driving assembly can move in the handle shell along the axial direction, the telescopic guide piece is connected between the locking seat and the driving assembly and can move in a telescopic mode when the driving assembly is close to or far away from the locking seat, the telescopic guide piece is provided with a guide wire channel, and the grinding guide wire can penetrate through the guide wire channel in an axial moving mode.

In one embodiment, the telescoping guide comprises a bellows; and/or, the telescoping guiding element comprises 2 or more than 2 sleeves nested within each other.

In one embodiment, a control switch is arranged on the handle shell and used for controlling the working state of the electromagnetic assembly.

On the other hand, the utility model provides a grind system soon, grind brake valve lever soon including foretell to and grind the seal wire soon and grind the pipe soon, grind the seal wire soon and wear to locate the handle inner chamber just grind the near-end of seal wire soon and stretch out the near-end of handle inner chamber, grind the near-end of pipe soon with grind brake valve lever soon and be connected.

The utility model discloses a grind system soon and grind brake valve lever soon thereof, including handle casing and lock silk structure, the handle casing has the handle inner chamber that supplies to grind the seal wire soon and pass, and this lock silk structure is including closure seat, closure piece and electromagnetic component, utilizes electromagnetic component to order about closure piece and closure seat when the circular telegram and presss from both sides the mill seal wire soon of wearing to locate the handle inner chamber for it is difficult to relative handle casing appearance not hard up in the mill operation to grind the seal wire soon, grinds soon in order to effectively guide to grind the pipe soon and stabilize, has improved the mill effect soon.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be 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, drawings of other 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 cross-sectional view of a portion of a rotational atherectomy control handle of an embodiment of the rotational atherectomy system;

FIG. 3 is a schematic view of a locking wire structure of a rotational atherectomy control handle and a connection structure of a telescoping guiding member in an embodiment of a rotational atherectomy system;

FIG. 4 is a schematic structural view of another embodiment of a telescoping guiding element in one embodiment of a rotational atherectomy system.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The 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 end" and "distal end" are used as terms of orientation, which are commonly used in the field of interventional medical devices, wherein "proximal end" refers to the end of the device that is closer to the operator and "distal end" 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 rotational atherectomy control handle 10 is the proximal end of the rotational atherectomy control handle 10, and the right end of the rotational control handle 10 is the distal end of the rotational control handle 10.

In the embodiment of the utility model, the axial direction is parallel to the direction of the connection line of the far end center and the near end center of the medical instrument; 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 rotational atherectomy control handle 10, a rotational atherectomy guide wire 20, and a rotational atherectomy catheter 30. The atherectomy control handle 10 has a handle lumen 10a through which the atherectomy guide wire 20 may be passed, specifically, the atherectomy guide wire 20 extends through the proximal end of the atherectomy control handle 10 and the distal end of the atherectomy control handle 10 along the handle lumen 10 a. The atherectomy guidewire 20 serves as a structural element for establishing a pathway in the body for guiding the atherectomy catheter 30 into the vessel at the location where the atherectomy is desired. The proximal end of the rotational grinding catheter 30 is connected with the rotational grinding control handle 10, and the rotational grinding catheter 30 is controlled by the rotational grinding control handle 10 to perform rotational grinding operation.

The atherectomy guidewire 20 may be moved along the handle lumen 10a to facilitate threading of the atherectomy guidewire 20 into a blood vessel. During the rotational milling process, the loosening of the rotational milling guide wire 20 relative to the rotational milling control handle 10 can affect the rotational milling effect. Therefore, the utility model discloses an among the rotational grinding system 100, the locking operation to the rotational grinding seal wire 20 can be realized to the rotational grinding brake valve lever 10 for the rotational grinding seal wire 20 is locked by relative rotational grinding brake valve lever 10, when the rotational grinding pipe 30 carries out the rotational grinding during operation, axial displacement and the rotation around the axle direction can not appear in the rotational grinding seal wire 20.

Specifically, the rotational grinding control handle 10 includes a handle housing 11 and a locking wire structure 12 disposed in the handle housing 11. The handle housing 11 is used for an operator to hold the handle housing for rotating and grinding operation. Understandably, the handle housing 11 encloses and forms the aforementioned handle inner cavity 10a, and the wire locking structure 12 is used for locking the rotational grinding guide wire 20 penetrating the handle inner cavity 10a, so that the rotational grinding guide wire 20 can stably guide the rotational grinding catheter 30 to perform rotational grinding, and the rotational grinding effect is improved.

As shown in fig. 3, the locking wire structure 12 includes a locking seat 121, a locking block 122 and an electromagnetic assembly 123. The locking seat 121 and the locking block 122 are disposed opposite to each other and can move relatively. The electromagnetic assembly 123 is used to drive the locking seat 121 and the locking block 122 to clamp the rotational grinding guide wire 20, so as to lock the rotational grinding guide wire 20.

In some embodiments, the locking receptacle 121 and the locking block 122 are relatively movable to a locked state and an unlocked state, wherein in the locked state, the locking receptacle 121 and the locking block 122 grip the atherectomy wire 20 to lock the atherectomy wire 20 relative to the handle housing 11 such that the atherectomy wire 20 cannot move relative to the handle housing 11; in the unlocked state, the locking seat 121 and the locking block 122 unlock the rotational atherectomy guide wire 20, and at this time, the rotational atherectomy guide wire 20 may be drawn out from the handle cavity 10a of the handle housing 11, so as to replace the rotational atherectomy guide wires 20 of different specifications or to perform disassembly and maintenance on the used rotational atherectomy guide wire 20.

The electromagnetic assembly 123 is used for driving the locking block 122 and the locking seat 121 to move relatively to the locking state. Specifically, after the electromagnetic assembly 123 is energized, the electromagnetic assembly 123 generates a magnetic attraction force, and the locking block 122 and the locking wire holder are relatively close to each other to a locking state by the magnetic attraction force, so as to provide a locking force for locking the rotational atherectomy guide wire 20.

The electromagnetic assembly 123 includes an electromagnet 123a and a magnet (not shown), the electromagnet 123a is disposed on one of the locking piece 122 and the locking seat 121, the magnet is disposed on the other of the locking piece 122 and the locking seat 121, the electromagnet 123a and the magnet are disposed opposite to each other, and when the electromagnet 123a is energized, the magnetic attraction between the electromagnet 123a and the magnet causes the locking piece 122 and the locking seat 121 to approach each other, so as to provide a clamping force for locking the rotational atherectomy guide wire 20.

It should be noted that the magnet may be integrally formed with the locking block 122 or the locking socket 121. For example, when the electromagnet 123a is disposed on the locking block 122, the magnet is integrally formed on the locking seat 121, or the locking seat 121 is made of a magnetic material to form a magnet, and preferably, the locking seat 121 is made of magnetic steel. For another example, taking the electromagnet 123a as an example disposed on the locking seat 121, the magnet may be integrally formed on the locking block 122, or the locking block 122 may be made of a magnetic material to form the magnet.

In some embodiments, a side of the locking seat 121 facing the locking block 122 is provided with a first groove 121a, and a side of the locking block 122 facing the locking seat 121 is provided with a second groove 122 a. When the locking block 122 and the locking seat 121 clamp the rotational grinding guide wire 20, the second groove 122a and the first groove 121a are combined to form the guide wire cavity 12a, so that the contact surface with the rotational grinding guide wire 20 is improved by utilizing the side wall of the guide wire cavity 12a, and the effect of performing friction positioning on the rotational grinding guide wire 20 is increased.

Further, the sidewalls of at least one of the second groove 122a and the first groove 121a are subjected to a roughening process, including but not limited to sanding, coating of friction powder, or attaching of friction pads. Preferably, the arithmetic mean deviation (Ra) of the profile of the side walls of the second groove 122a and/or the first groove 121a is greater than 25 μm.

As shown in fig. 3, in some embodiments, an elastic member 124 is disposed between the locking piece 122 and the locking seat 121, and when the electromagnetic assembly 123 is de-energized, the elastic member 124 drives the locking piece 122 and the locking seat 121 to move away from each other, so that the locking piece 122 and the locking seat 121 can stably and quickly return to the unlocked state by an elastic restoring action of the elastic member 124 between the locking piece 122 and the locking seat 121. With this structure, the elastic member 124 can support between the locking piece 122 and the locking seat 121, so that the locking piece 122 and the locking seat 121 can be stably opened and closed under the driving of the electromagnetic assembly 123. Understandably, when the electromagnetic assembly 123 is required to drive the locking block 122 and the locking seat 121 to move relatively to the locking state, only the electromagnetic assembly 123 needs to be energized, so that the magnetic force applied to the locking block 122 and the locking seat 121 by the electromagnetic assembly 123 overcomes the elastic force of the elastic member 124, and the rotational abrasion guide wire 20 passing through the handle inner cavity 10a and clamped by the locking block 122 and the locking seat 121 can be realized.

Preferably, the elastic member 124 is a spring, wherein the spring can be fixedly connected with the locking seat 121. Alternatively, the two ends of the spring may also abut against the locking seat 121 and the locking block 122, respectively. The manner of mounting the spring is not limited herein.

In some embodiments, 2 or more than 2 springs are disposed between the locking piece 122 and the locking seat 121 to improve the motion stability between the locking piece 122 and the locking seat 121.

It should be noted that the elastic member 124 is not essential. For example, in some embodiments, the locking block 122 and the locking socket are disposed in the handle housing 11 to move relative to each other, so that the locking block 122 and the locking socket can have a stable movement track by using the handle housing 11. For another example, in some embodiments, the locking seat 121 is fixed in the handle housing 11 by a snap connection, a screw connection, or an integral molding, which is not limited herein. The locking block 122 is slidably connected to the handle housing 11 and is movable relative to the locking seat 121 in a direction perpendicular to the rotational atherectomy guide wire 20 to selectively lock the rotational atherectomy guide wire 20 or release the locking of the rotational atherectomy guide wire 20.

As shown in fig. 2, 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 locking wire structure 12 may be conveniently assembled in the handle housing 11 by combining the first housing 11a and the second housing 11 b.

In some embodiments, a driving assembly 13 is further disposed in the handle housing 11, and the driving assembly 13 is used for driving the rotational atherectomy catheter 30 to move, so that the rotational atherectomy catheter 30 abrades the arteriosclerotic plaque in the blood vessel to open the blood vessel.

Referring to fig. 1, the rotational atherectomy catheter 30 includes a rotational head 31, a catheter 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 enhancing the friction effect, for example, diamond particles of 20 to 30 microns in size. Therefore, when the rotational grinding head 31 is used for grinding the arteriosclerosis plaques in the blood vessels, the particles on the distal end part of the rotational grinding head also have a better grinding effect.

It should be noted that the rotational head 31 can be driven by the conduit 32, and specifically, the rotational head 31 is connected to the distal end of the conduit 32, and the proximal end of the conduit 32 is connected to the driving assembly 13, so as to drive the rotational motion of the rotational head 31 through the conduit 32 by the driving assembly 13.

The driving assembly 13 is axially movable within the handle housing 11 so that the catheter 32 moves the abrasive tip 31 distally or proximally relative to the handle housing 11, thereby accommodating the need for the abrasive tip 31 to move within the blood vessel to accommodate the need for dredging the blood vessel.

The handle case 11 is provided with an operating portion 14, and the operating portion 14 is exposed to the outside of the handle case 11 and is movable in the axial direction relative to the handle case 11. The operation portion 14 is connected to the driving unit 13 so that the driving unit 13 can be moved by the operation portion 14, that is, the axial position of the driving unit 13 in the handle housing 11 is adjusted, so that the rotational atherectomy catheter 30 connected to the driving unit 13 can be moved in the blood vessel to open the blood vessel. The operation portion 14 may be a knob or a push switch, and is not limited herein.

In some embodiments, as shown in fig. 1 and 3, a telescopic guide 15 is disposed between the locking seat 121 and the driving assembly 13, and the telescopic guide 15 can be adapted to the telescopic requirement, specifically, when the driving assembly 13 moves axially in the handle housing 11, i.e. when approaching or moving away from the locking seat 121, the telescopic guide 15 connected between the driving assembly 13 and the locking seat 121 will be stretched or squeezed, so that the telescopic guide 15 can move telescopically.

The telescopic guide member 15 has a guide wire channel 15a, a rotational grinding guide wire 20 is axially movably arranged in the guide wire channel 15a, and the rotational grinding guide wire 20 penetrates out of the far end of the guide wire channel 15 a. Utilize this wire guide passageway 15a to support the direction to grind the seal wire 20 soon, promptly, flexible guide member 15 telescopically overlaps and establishes on grind the seal wire 20 soon to can play the supporting effect to grind the seal wire 20 soon, avoid grind the seal wire 20 soon and correspond the part of wire guide passageway 15a and appear crooked. Through the structure, when the driving assembly 13 drives the rotational head 31 to move along the axial direction of the rotational grinding guide wire 20 through the guide pipe 32, the rotational grinding guide wire 20 has good stability under the support of the telescopic guide piece 15, so that the coaxiality of the rotational grinding guide wire 20 and the guide pipe 32 is maintained, and the rotational grinding operation stability is improved.

Further, the guide wire cavity 12a is closely attached to the proximal end of the telescopic guide 15 and has a flared opening at the attachment, the maximum diameter of the flared opening is the same as the maximum diameter of the telescopic guide 15, and the structure can enhance the passing property and the coaxiality of the rotational grinding guide wire 20.

The telescoping guiding element 15 may also comprise 2 or more than 2 sleeves, with which sleeves are nested into each other to form a telescopic structure. Taking the example in which the telescopic guide 15 shown in connection with fig. 3 comprises 3 sleeves, for the sake of convenience, the 3 sleeves are specifically a first sleeve 151, a second sleeve 152 and a third sleeve 153, the second sleeve 152 is axially movable relative to the first sleeve 151, and the third sleeve 153 is axially movable relative to the second sleeve 152. The rotational grinding guide wire 20 is axially movably inserted through the first sleeve 151, the second sleeve 152 and the third sleeve 153, or the first sleeve 151, the second sleeve 152 and the third sleeve 153 can axially move relative to the rotational grinding guide wire 20, so that when the driving assembly 13 moves axially relative to the handle housing 11, the relative movement of the driving assembly 13 and the locking seat 121 draws the telescopic guide 15, so that the first sleeve 151, the second sleeve 152 and the third sleeve 153 can move telescopically with respect to each other. In this process, since the rotational grinding guide wire 20 is inserted into the guide wire passage 15a of the telescopic guide 15 (i.e., the lumen of the above-described sleeve), the first sleeve 151, the second sleeve 152, and the third sleeve 153 can be supported, and the bending is not likely to occur, so that good coaxiality can be maintained, and the rotational grinding head 31 can be stably guided to perform the rotational grinding.

The telescopic guide 15 may be a telescopic tubular structure, for example, as shown in fig. 4, the telescopic guide 15 is a bellows, so that the rotational atherectomy guide wire 20 inserted therein can be supported and guided, and can be moved telescopically in accordance with the axial movement of the driving unit 13 in the handle housing 11.

In some embodiments, the telescoping guide 15 includes both sleeves nested within one another and a bellows, such that the telescoping guide 15 forms tube sections having different telescoping properties.

In some embodiments, the catheter 32 is a flexible tube, the lumen of which can be threaded over the guidewire 20, thereby facilitating the pushing of the atherectomy head 31 over the guidewire 20 to the location where atherectomy is desired. During the rotational grinding process, the catheter 32 can also be used to carry the rotational grinding head 31 to move back and forth along the axial direction of the rotational grinding guide wire 20 (for example, the distance of each back and forth movement is controlled within 4 cm) to perform progressive grinding on the arteriosclerotic plaque, and it can be understood that, during 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 distal end through the catheter 32, so that the rotational grinding head 31 can be kept in good contact with the arteriosclerotic plaque, and the grinding effect can be 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 same portion of the blood vessel where the rotating head 31 stays for a long time and damages the blood vessel tissue at the local position, it is preferable to withdraw the rotating head 31 proximally when the rotating head is rotated for a certain time. For example, each rotational abrasion for 25 seconds, the rotational head 31 is withdrawn proximally to clear the atherosclerotic plaque. Therefore, the phenomenon that the rotary grinding head 31 is easily scalded due to long-time rotary grinding and is not beneficial to the fragment 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 pipe 32 to this avoids the rotational abrasion in-process, and pipe 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.

It should be noted that, in the rotational atherectomy system 100 of the present invention, the locking wire structure 12 in the rotational atherectomy control handle 10 can generate magnetic attraction by energizing the electromagnet 123a, so that the locking block 122 and the locking seat 121 clamp the rotational atherectomy guide wire 20. Therefore, the locking force between the locking piece 122 and the locking seat 121 can be adjusted by controlling the current or voltage applied to the electromagnet 123 a. Therefore, the locking wire structure 12 can be conveniently applied to the locking and releasing operations of different specifications of the rotational grinding guide wire 20. For example, in some embodiments, when the diameter of the rotational milled wire 20 is small, a larger current or voltage may be applied to the electromagnet 123a in order to improve the locking stability of the rotational milled wire 20. Accordingly, when the diameter of the rotational milled guide wire 20 is large, a small current or voltage may be applied to the electromagnet 123a to maintain the locking requirement of the rotational milled guide wire 20.

Further, in order to improve the convenience of adjusting the current or voltage, a control switch 16 may be disposed on the handle housing 11, and the control switch 16 is used for controlling the operating state of the electromagnetic assembly 123. The control switch 16 is electrically connected to the electromagnet 123a and is used for controlling the operating state of the electromagnet 123a, such as controlling the electromagnet 123a to be powered on or powered off, or controlling the current or voltage when the electromagnet 123a is powered on.

The operation of the rotational atherectomy procedure will now be briefly described with reference to rotational atherectomy system 100.

Before the rotational grinding guide wire 20 is introduced into the rotational grinding control handle 10, the operating portion 14 is first pulled to the proximal end position with respect to the handle case 11, and the telescopic guide 15 is completely retracted. At this time, the rotational atherectomy guide wire 20 is introduced into the handle lumen 10a from the distal end (the position of the rotational head 31) and passes through the guide wire lumen 12a between the locking block 122 and the locking socket 121. It is further confirmed that the proximal end 20a of the milled guidewire 20 (see fig. 1) extends a distance from the proximal end of the handle housing 11 and the milled guidewire 20 is straightened. At this time, the electromagnet 123a is turned on by the control switch 16, so that the electromagnet 123a is electrified to generate magnetic force, and the locking block 122 and the locking seat 121 are clamped and arranged on the rotational grinding guide wire 20. It should be noted that the rotational atherectomy system 100 may be tested in vitro prior to entering the body. For example, the rotational grinding is started in vitro, whether the rotational grinding guide wire 20 moves in the axial direction or the axial direction is observed, if so, the clamping force of the locking block 122 and the locking seat 121 on the rotational grinding guide wire 20 is not enough, at the moment, only the rotational grinding needs to be closed, the current or the voltage led into the electromagnet 123a is increased by adjusting the control switch 16, and the steps are repeated until the rotational grinding guide wire 20 does not move in the axial direction and the axial direction when the rotational grinding operation is carried out again.

When the position of the rotational grinding guide wire 20 needs to be replaced or adjusted, the control switch 16 may close the locking structure 12 to lock the rotational grinding guide wire 20. In particular, in the embodiment provided with the elastic member 124, after the electromagnet 123a is de-energized, the elastic action of the elastic member 124 will quickly move the locking block 122 and the locking seat 121 away from each other to release the rotational atherectomy guide wire 20.

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 specific and detailed, but not to be construed as limiting the scope of the claims. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A rotational atherectomy control handle, comprising:

2. The atherectomy control handle of claim 1, wherein the locking block and the locking seat are relatively movable to a locked state wherein the locking seat and the locking block grip the atherectomy guide wire and an unlocked state wherein the locking seat and the locking block unlock the atherectomy guide wire; the electromagnetic assembly generates magnetic attraction when being electrified, so that the locking block and the locking seat move relatively to a locking state, and when the electromagnetic assembly is powered off, the locking block and the locking seat are in an unlocking state.

3. The rotational atherectomy control handle according to claim 2, wherein an elastic member is disposed between the locking block and the locking seat, and when the electromagnetic assembly is de-energized, the elastic member drives the locking block and the locking seat to move in a direction away from each other.

4. The rotational atherectomy control handle of claim 2, wherein the electromagnetic assembly comprises an electromagnet and a magnet that are oppositely disposed, the electromagnet being disposed on one of the locking block and the locking receptacle, and the magnet being disposed on the other of the locking block and the locking receptacle.

5. The rotational atherectomy control handle according to claim 2, wherein a first groove is formed in one side of the locking seat facing the locking block, a second groove is formed in one side of the locking block facing the locking seat, when the rotational atherectomy guide wire is clamped between the locking block and the locking seat, the second groove and the first groove are closed to form a guide wire cavity, and the rotational atherectomy guide wire is inserted into and positioned in the guide wire cavity.

6. The atherectomy control handle of claim 5, wherein the sidewall of at least one of the second groove and the first groove has an arithmetic mean deviation (Ra) of profile greater than 25 μm.

7. The atherectomy control handle of claim 1, comprising a drive assembly and a telescoping guide, wherein the drive assembly is configured to drive the atherectomy catheter to move, and the drive assembly is axially movable within the handle housing, the telescoping guide is coupled between the locking seat and the drive assembly and is configured to move telescopically when the drive assembly approaches or leaves the locking seat, the telescoping guide has a guide wire channel, and the atherectomy guide wire is axially movably disposed through the guide wire channel.

8. The rotational atherectomy control handle of claim 7, wherein the telescoping guide comprises a bellows; and/or, the telescoping guiding element comprises 2 or more than 2 sleeves nested within each other.

9. The rotational atherectomy control handle of claim 1, wherein the handle housing is provided with a control switch for controlling the operating state of the electromagnetic assembly.

10. A rotational atherectomy system comprising the rotational atherectomy control handle of any of claims 1 to 9, and a rotational atherectomy guide wire and a rotational atherectomy catheter, wherein the rotational atherectomy guide wire is inserted into the inner lumen of the handle and the proximal end of the rotational atherectomy guide wire extends out of the proximal end of the inner lumen of the handle, and the proximal end of the rotational atherectomy catheter is connected to the rotational atherectomy control handle.