CN116407379A

CN116407379A - Handle, conveying device and medical system

Info

Publication number: CN116407379A
Application number: CN202111645271.9A
Authority: CN
Inventors: 刘梦钦; 杨波; 姬庆茹; 郭澜涛
Original assignee: Shanghai Hongmai Medical Technology Co ltd
Current assignee: Shanghai Hongmai Medical Technology Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2023-07-11
Also published as: WO2023125135A1

Abstract

The invention provides a handle, a conveying device and a medical system, wherein the handle comprises a shell; the driving mechanism is arranged on the shell; the transmission mechanism comprises a first transmission part, a second transmission part and a third transmission part; the first transmission part is connected with the driving mechanism, and the second transmission part is used for controlling the on-off of power transmission between the first transmission part and the third transmission part; the driving mechanism is used for driving the first target object to move in the forward direction or the reverse direction through the first transmission part; when the driving mechanism drives the first object to move in the forward direction, the second transmission part is connected with power transmission between the first transmission part and the third transmission part and drives the second object to move in the direction from the far end to the near end, and when the driving mechanism drives the first object to move in the reverse direction, the second transmission part is disconnected with power transmission between the first transmission part and the third transmission part. The handle is applied to a conveying system, improves the positioning accuracy when the medical stent is released, and reduces the conveying resistance.

Description

Handle, conveying device and medical system

Technical Field

The invention relates to the technical field of medical instruments, in particular to a handle, a conveying device and a medical system.

Background

With the development of endoluminal technology, the use of medical implants, such as medical stents, has gained widespread acceptance by radiologists, cardiologists, and surgeons. These medical implants are used to support various lumens in the body including arteries, veins, airways, gastrointestinal tract, biliary tract, and the like. The preferred method of implantation of medical implants is to use a specialized delivery device to accurately deliver and release the implant at a predetermined location through the lumen of the body itself. By virtue of the small outer diameter of the delivery device, the surgeon can reduce the surgical incision as much as possible to achieve minimally invasive procedures.

Medical implants are generally plastically deformable (e.g., medical stents that are expanded using a balloon) or elastically deformable (e.g., self-expanding medical stents). The medical implant is delivered to the target lumen at a predetermined location by the delivery device in a compressed state, and after being released, the medical implant can be expanded to a working diameter by external forces (e.g., forces provided by a balloon) or by itself.

For self-expanding stents, particularly braided stents, significant axial elongation occurs when compressed onto the delivery device, typically extending over more than 2 times the initial length. In the process of releasing the medical stent, the medical stent is axially contracted due to radial expansion, which can lead to the medical stent deviating from a preset position, thereby adversely affecting the treatment effect.

Disclosure of Invention

The invention aims to provide a handle, a conveying device and a medical system, which aim to improve the positioning accuracy of the medical implant during release and further improve the treatment effect.

To achieve the above object, the present invention provides a handle comprising:

a housing;

the driving mechanism is arranged on the shell; the method comprises the steps of,

the transmission mechanism comprises a first transmission part, a second transmission part and a third transmission part; the first transmission part is connected with the driving mechanism, and the second transmission part is used for controlling the on-off of power transmission between the first transmission part and the third transmission part;

the driving mechanism is used for driving the first target object to move in the forward direction or the reverse direction through the first transmission part; when the driving mechanism drives the first object to move in the forward direction, the second transmission part is connected with power transmission between the first transmission part and the third transmission part and drives the second object to move in the reverse direction, and when the driving mechanism drives the first object to move in the reverse direction, the second transmission part is disconnected with power transmission between the first transmission part and the third transmission part.

Optionally, the second transmission part is connected with the first transmission part, and the second transmission part is connected with the third transmission part when the driving mechanism drives the first object to move along the forward direction, and is disconnected with the third transmission part when the driving mechanism drives the first object to move along the reverse direction.

Optionally, the second transmission part comprises a base body, a first power transmission part and a first clutch part, wherein the first power transmission part and the first clutch part are both arranged on the base body, and the first power transmission part is connected with the first transmission part; the third transmission part comprises a second clutch part and a second power transmission part; the second power transmission part is connected with the second clutch part and is also connected with the second target object;

when the driving mechanism drives the first object to move in the forward direction, the first clutch part is connected with the second clutch part, and when the driving mechanism drives the first object to move in the reverse direction, the first clutch part is disconnected with the second clutch part.

Optionally, the first transmission part comprises a rack; the transmission mechanism further comprises a mandrel, and the mandrel is connected to the shell; the base body is a rotating wheel, the rotating wheel is arranged on the mandrel and can rotate relative to the shell, straight teeth are formed on the outer peripheral surface of the rotating wheel, and the straight teeth form the first power transmission part and are meshed with the racks; a counter bore is formed on one end face of the rotating wheel, a first ratchet is formed on the wall of the counter bore, and the first ratchet forms the first clutch part; the second clutch part comprises a unidirectional wheel, and a first pawl is formed on the outer peripheral surface of the unidirectional wheel;

when the driving mechanism drives the first object to move in the positive direction, the rotating wheel rotates in a first direction and enables the first ratchet to be meshed with the first pawl, when the driving mechanism drives the first object to move in the opposite direction, the rotating wheel rotates in a second direction and enables the first ratchet to be disengaged from the first pawl, and the second direction is opposite to the first direction.

Optionally, the second power transmission part comprises a turntable and a pull rope; the turntable is axially connected with the unidirectional wheel and is kept circumferentially relatively static with the unidirectional wheel; the proximal end of the stay cord is arranged on the outer peripheral surface of the turntable, and the distal end of the stay cord is used for being connected with the second target object.

Optionally, the third transmission part further comprises a ratchet wheel, the ratchet wheel is axially connected with one of the turntable and the unidirectional wheel, the ratchet wheel and the turntable keep relatively static in the circumferential direction, and a second ratchet is formed on the outer circumferential surface of the ratchet wheel; the handle further includes a second pawl disposed on the housing, the second pawl engaging the second ratchet to prevent rotation of the ratchet in the second direction, or the second pawl disengaging the second ratchet to allow rotation of the ratchet in the first direction.

Optionally, the housing has an inner cavity, and the transmission mechanism is disposed in the inner cavity; the handle also comprises a guide wheel, wherein the guide wheel is arranged in the inner cavity and is rotatably connected to the shell; the guide wheel is positioned at the distal end side of the third transmission part, and part of the outer surface of the guide wheel is contacted with the pull rope.

Optionally, a sliding groove extending along an axial direction is formed in the shell, the driving mechanism comprises an operation portion and a connection portion, the operation portion is located outside the shell, one end of the connection portion is connected with the operation portion, and the other end of the connection portion penetrates through the sliding groove and is connected with the first transmission portion.

In order to achieve the above object, the present invention also provides a conveying apparatus, including:

a handle as claimed in any preceding claim; the method comprises the steps of,

the catheter mechanism comprises an outer tube, an inner tube and barbs, wherein the proximal end of the outer tube is connected with the third transmission part, the inner tube is partially arranged in the outer tube, the proximal end of the inner tube is connected with the first transmission part, one ends of the barbs are connected to the outer surface of the distal end of the inner tube, the other ends of the barbs are free ends, and the free ends face the distal end of the inner tube.

To achieve the above object, the present invention also provides a medical system comprising:

a medical implant, wherein a plurality of holes are formed in the medical implant, and part of the holes are arranged along the axial direction of the medical implant; the method comprises the steps of,

the delivery device as described above, wherein the catheter mechanism is configured to load the medical implant and wherein the free ends of the barbs are selectively inserted into portions of the aperture.

Optionally, the medical implant is a self-expanding medical stent.

Compared with the prior art, the handle, the conveying device and the medical system have the following advantages:

the handle comprises a shell, a driving mechanism and a transmission mechanism; the driving mechanism is arranged on the shell; the transmission mechanism comprises a first transmission part, a second transmission part and a third transmission part; the first transmission part is connected with the driving mechanism, and the second transmission part is used for controlling the on-off of power transmission between the first transmission part and the third transmission part; the driving mechanism is used for driving the first target object to move in the forward direction or the reverse direction through the first transmission part; when the driving mechanism drives the first object to move in the forward direction, the second transmission part is connected with power transmission between the first transmission part and the third transmission part and drives the second object to move in the reverse direction, and when the driving mechanism drives the first object to move in the reverse direction, the second transmission part is disconnected with power transmission between the first transmission part and the third transmission part. Here, "forward direction" means a direction from the proximal end to the distal end, and "reverse direction" means a direction from the distal end to the proximal end. The handle is applied to a conveying device of a medical implant, wherein the conveying device further comprises a catheter mechanism, the catheter mechanism comprises an inner tube, barbs and an outer tube, the inner tube is used as a first target object to be connected with the first transmission part, the barbs are arranged on the outer surface of the distal end of the inner tube, the free ends of the barbs face the distal end of the inner tube, the outer tube is partially sleeved on the outer circumferential surface of the inner tube, and the outer tube is used as a second target object to be connected with the third transmission part. The catheter mechanism is for loading a medical implant in a compressed state and the barbs are for inserting into a portion of the aperture of the medical implant. When the conveying device conveys the medical implant in a compressed state to a preset position of a target lumen, the medical implant starts to be released, in the releasing process, when the driving mechanism drives the inner tube to move in the positive direction and drives the medical implant to integrally move in the positive direction, and simultaneously drives the outer tube to move in the opposite direction, so that the axial shortening of the medical implant caused by radial expansion in the releasing process is compensated through the integral movement of the medical implant in the positive direction, and the positioning accuracy of the medical implant in the releasing process is improved, and the treatment effect is improved. And the driving mechanism can drive the inner tube to move along the reverse direction, so that when the driving mechanism alternately drives the inner tube to move along the forward direction or the reverse direction and the medical implant is pulled out section by utilizing the barbs, the problem of high release resistance of the medical implant is reduced, and the smoothness rate of the medical implant in the release process is improved.

Drawings

The drawings are included to provide a better understanding of the invention and are not to be construed as unduly limiting the invention. Wherein:

FIG. 1 is a schematic view of a handle according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the handle shown in FIG. 1 at A;

FIG. 3 is a schematic view of a delivery device according to an embodiment of the present invention, with a medical stent mounted in the delivery device;

FIG. 4 is a schematic view of a delivery device according to an embodiment of the present invention when loading a medical stent;

FIG. 5 is a schematic view of a second transmission portion of a handle according to an embodiment of the present invention;

FIG. 6 is a schematic view of a third transmission portion of a handle according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a third transmission part of a handle according to an embodiment of the present invention, and the viewing orientation of fig. 6 is different from that of fig. 6.

Reference numerals are described as follows:

100-handle, 1000-shell, 1001-inner cavity, 2000-driving mechanism, 2100-operation part, 2200-connection part, 3000-driving mechanism, 3100-first driving part, 3200-second driving part, 3210-base, 3211-first central hole, 3220-first power transmission part, 3212-counter bore, 3230-first clutch part, 3300-third driving part, 3310-second clutch part, 3311-first pawl, 3320-second power transmission part, 3321-turntable, 3322-stay cord, 3301-second central hole, 3340-ratchet, 3341-second ratchet, 3400-mandrel, 4000-second pawl, 5000-guide wheel;

200-catheter mechanism, 210-inner tube, 220-barb, 230-outer tube, 300-seeker, 400-inner tube tail end connector;

10-a conveying device;

20-a medical stent.

Detailed Description

Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that, the illustrations provided in the present embodiment merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.

In addition, each embodiment of the following description has one or more features, respectively, which does not mean that the inventor must implement all features of any embodiment at the same time, or that only some or all of the features of different embodiments can be implemented separately. In other words, those skilled in the art can implement some or all of the features of any one embodiment or a combination of some or all of the features of multiple embodiments selectively, depending on the design specifications or implementation requirements, thereby increasing the flexibility of the implementation of the invention where implemented as possible.

As used in this specification, the singular forms "a", "an" and "the" include plural referents, unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise, and the terms "mounted," "connected," and "connected" are to be construed broadly, as for example, they may be fixed, they may be removable, or they may be integrally connected. Either mechanically or electrically. Can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

As used herein, the terms "proximal" and "distal" refer to the relative orientation, relative position, orientation of elements or actions relative to one another from the perspective of the physician using the medical device, although "proximal" and "distal" are not intended to be limiting, and "proximal" generally refers to the end of the medical device that is closer to the physician during normal operation, and "distal" generally refers to the end that is closer to the patient.

The invention will be further described in detail with reference to the accompanying drawings, in order to make the objects, advantages and features of the invention more apparent. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention. The same or similar reference numbers in the drawings refer to the same or similar parts.

Fig. 1 shows a schematic structural view of a handle 100 according to an embodiment, and fig. 2 is an enlarged schematic view at a in fig. 1. As shown in fig. 1 and 2, the handle 100 includes a housing 1000, a driving mechanism 2000, and a transmission mechanism 3000. The drive mechanism 2000 is provided on the housing 1000. The transmission mechanism 3000 is disposed on the housing 1000, and includes a first transmission portion 3100, a second transmission portion 3200, and a third transmission portion 3300. The first transmission part 3100 is connected to the driving mechanism 2000, and enables the driving mechanism 2000 to drive the first object to move in the forward direction or the reverse direction through the first transmission part 3100. The second transmission part 3200 is used for controlling the on-off of power transmission between the first transmission part 3100 and the third transmission part 3300. Specifically, when the driving mechanism 2000 drives the first object to move in the forward direction, the second transmission part 3200 turns on the power transmission between the first transmission part 3100 and the third transmission part 3300, so that the driving mechanism 2000 can drive the second object to move in the reverse direction through the transmission mechanism 3000. When the driving mechanism 2000 drives the first object to move in the reverse direction, the second transmission part 3200 disconnects the power transmission between the first transmission part 3100 and the third transmission part 3300.

As shown in FIG. 3, the handle 100 is applied to a delivery device 10, and the "forward direction" refers to the direction from the proximal end toward the distal end, and the "reverse direction" refers to the direction from the distal end toward the proximal end. The delivery device 10 further includes a catheter mechanism 200. With continued reference to fig. 3, in conjunction with fig. 4, catheter mechanism 200 includes an inner tube 210, barbs 220, and an outer tube 230. The inner tube 210 serves as the first target object, and its proximal end is connected to the first transmission portion 3100. One end of the barb 220 is connected to the distal outer circumferential surface of the inner tube 210, and the other end of the barb 220 is a free end, and the free end of the barb 220 faces the distal end of the inner tube 210. The outer tube 230 is sleeved on a part of the outer circumferential surface of the inner tube 210, and the outer tube 230 is used as the second target object, and the proximal end of the second target object is connected with the third transmission part 3300. Wherein the inner tube 210 may include an inner tube body and an inner tube connector connected to a proximal end of the inner tube body, and the outer tube 230 may include an outer tube body and an outer tube connector connected to a proximal end of the outer tube body.

As shown in fig. 4, the catheter mechanism 200 is used to load a medical implant having a plurality of apertures therein, at least a portion of the plurality of apertures being spaced apart along an axial direction of the medical implant. The free ends of the barbs 220 are selectively inserted into portions of the apertures when the medical implant is loaded in the catheter mechanism 200. The medical implant may be a self-expanding medical stent 20, and the medical stent 20 may be woven from wire. The term "self-expanding medical stent 20" as used herein means that the medical stent 20 is made of a highly elastic material such as a nickel-titanium alloy material.

The delivery device 10 is used to deliver the medical implant to a patient for delivery at a predetermined location within a target lumen. The release process may include the steps of:

step S1: the driving mechanism 2000 is driven to move the inner tube 210 in the positive direction through the first transmission part 3100, and integrally moves the medical stent 20 in the positive direction through the barbs 220. At the same time, the second transmission portion 3200 also transmits power between the first transmission portion 3100 and the third transmission portion 3300, so that the driving mechanism 2000 drives the outer tube 230 to move in the opposite direction through the transmission mechanism 3000.

When the barb 220 is extended out of the outer tube 230, causing the barb 220 to separate from the medical stent 20, step S2 is performed: causing the drive mechanism 2000 to drive the inner tube 210 in the opposite direction through the first transmission 3100 causes the barbs 230 to revert back into the outer tube 230 and through another portion of the pores of the medical stent 20. At this time, since the second transmission part 3200 breaks the power transmission between the first transmission part 3100 and the third transmission part 3300, the driving force provided by the driving mechanism 2000 cannot be transmitted to the third transmission part 3300, that is, cannot be transmitted to the outer tube 230, and thus, the outer tube 230 is maintained fixed in this step in an ideal state.

Steps S1 and S2 are then repeated until the medical stent 20 is completely released.

In this release process, the inner tube 210 may carry the medical stent 20 to move in the forward direction to compensate for the axial shrinkage of the medical stent 20 caused by radial expansion during the retraction of the outer tube 230 (i.e., the movement of the outer tube 230 in the distal-to-proximal direction), thereby improving the positioning accuracy of the medical stent 20 during release, and improving the therapeutic effect. And the inner tube 220 reciprocally moves axially, the barbs 230 may be used to pull the medical stent 20 distally segment by segment, so that the medical stent 20 is in tension during the release process, reducing the release resistance and improving the release patency of the medical stent 20.

Referring back to fig. 1 and 2, in the present embodiment, the second transmission portion 3200 is connected to the first transmission portion 3100. The second transmission part 3200 is connected to the third transmission part 3300 when the driving mechanism 2000 drives the inner tube 210 to move in the forward direction, and the second transmission part 3200 is disconnected from the third transmission part 3300 when the driving mechanism 2000 drives the inner tube 210 to move in the reverse direction.

With continued reference to fig. 1 and 2, and with reference to fig. 3 and 5 to 7, in an alternative implementation manner, the second transmission portion 3200 includes a base body 3210, a first power transmission portion 3220 and a first clutch portion 3230, where the first power transmission portion 3220 and the first clutch portion 3230 are both disposed on the base body 3210, and the first power transmission portion 3220 is connected to the first transmission portion 3100. The third transmission part 3300 includes a second clutch part 3310 and a second power transmission part 3320, and the second power transmission part 3320 is connected to the second clutch part 3310 and also connected to the outer tube 230. When the driving mechanism 2000 drives the inner tube 210 to move in the positive direction, the first clutch portion 3230 is connected with the second clutch portion 3310, so that the second transmission portion 3200 is connected with the third transmission portion 3300. When the driving mechanism 2000 drives the inner tube 210 to move in the opposite direction, the first clutch portion 3230 is disconnected from the second clutch portion 3310, so that the second transmission portion 3200 is disconnected from the third transmission portion 3300.

In more detail, the first transmission portion 3100 includes a rack, a distal end of which is connected with a proximal end of the inner tube 210 (specifically, the inner tube connector). The transmission 3000 further includes a spindle 3400, the spindle 3400 being coupled to the housing 1000. The base 3210 includes a rotating wheel that is provided on the spindle 3400 and that is rotatable relative to the housing 1000. In a specific implementation, the spindle 3400 is fixedly disposed on the housing 1000, and the rotating wheel is provided with a first central hole 3211, and the rotating wheel is sleeved on the spindle 3400 through the first central hole 3211, so that the rotating wheel can rotate on the spindle 3400. A spur gear is formed on the outer circumferential surface of the rotating wheel, the spur gear being engaged with the rack gear and transmitting power, that is, the spur gear constitutes a first power transmission portion 3220. A counter bore 3212 is further formed on one end surface of the rotating wheel, and a first ratchet is formed on a hole wall of the counter bore 3212 to serve as the first clutch portion 3230. The second clutch portion 3310 includes a unidirectional wheel, the third transmission portion 3300 is further provided with a second central hole 3301 penetrating through the unidirectional wheel in the axial direction, the unidirectional wheel is sleeved on the mandrel 3400 through the second central hole 3301, and the unidirectional wheel is at least partially located in the counter bore 3230. The one-way wheel has a first pawl 3311 formed on its outer circumferential surface. When the driving mechanism 2000 drives the inner tube 210 to move in the forward direction, the rotating wheel rotates in a first direction and causes the first ratchet to engage with the first pawl 3311 to connect the first clutch portion 3230 with the second clutch portion 3310. When the driving mechanism 2000 drives the inner tube 210 to move in the opposite direction, the rotating wheel rotates in a second direction opposite to the first direction, so that the first ratchet is disengaged from the first pawl 3311, and the first clutch portion 3230 is disconnected from the second clutch portion 3310.

Optionally, the second power transmission part 3320 includes a rotating disc 3321 and a pulling rope 3322. The unidirectional wheel is axially coupled to the dial 3321 and remains circumferentially relatively stationary, and the second central bore 3301 also extends through the dial 3321 such that the dial 3321 is cannulated over the mandrel 3400 via the second central bore 3301. The proximal end of the pulling cord 3322 is disposed on the outer circumferential surface of the turntable 3321, and the distal end of the pulling cord 3322 is connected to the proximal end of the outer tube 230 (specifically, the outer tube connector).

Taking the orientations shown in fig. 1 and 3 as an example, the distal end of the handle 100 is the left end, the proximal end is the right end, and the positive direction is the direction in which the right end points to the left end. Thus, during use of the handle 100, when the driving mechanism 2000 drives the rack to move along the right end to the left end, the inner tube 210 is further driven to move along the positive direction. Simultaneously, the rotating wheel rotates anticlockwise (namely, the first direction) under the action of the rack, so that the first pawl is clamped in the tooth socket of the first ratchet to realize the engagement of the first pawl and the tooth socket of the first ratchet, and further drive the unidirectional wheel and the rotary disc 3321 to rotate anticlockwise and tighten the pull rope 3322 so as to pull the outer tube 230 to move along the distal end to the proximal end. When the driving mechanism 2000 drives the rack to move along the left end to the right end, the inner tube 210 is pulled to move along the opposite direction, and the rotating wheel is rotated in the clockwise direction (i.e. the second direction), so that the first pawl 3311 slides along the back of the first ratchet teeth, so as to release the engagement of the first pawl 3311 with the first ratchet teeth.

It will be appreciated by those skilled in the art that when the back of the first ratchet tooth is sufficiently smooth, the friction generated by the first pawl 3311 sliding over the back of the first ratchet tooth will not be sufficient to drive the one-way wheel to rotate clockwise so that the one-way wheel remains stationary. However, when the back of the first ratchet tooth is rough, the first pawl 3311 generates a large friction force when sliding on the back of the first ratchet tooth, which would rotate the one-way wheel in a clockwise direction, thereby rotating the dial 3321 in a clockwise direction and releasing the pull cord 3322, which would cause the outer tube 230 to move in a proximal-to-distal direction.

In view of this, as shown in fig. 2, 6 and 7, the third transmission part 3300 further includes a ratchet wheel 3340, and the ratchet wheel 3340 is axially connected with one of the unidirectional wheel or the turntable 3321. In this embodiment, the outer diameter of the rotating disc 3321 is preferably smaller than the outer diameter of the unidirectional wheel, and the ratchet wheel 3340 is connected to the end of the rotating disc 3321 far from the unidirectional wheel. This has the advantage that the pull cord 3322 is prevented from being detached from the turntable 3321.

With continued reference to fig. 2, 6 and 7, the ratchet 3340 has a second ratchet 3341 formed on an outer peripheral surface thereof. The handle 100 further includes a second pawl 4000, the second pawl 4000 being provided on the housing 1000, the second pawl 4000 being configured to engage with the second ratchet 3341 to prevent the ratchet 3340 from rotating in a clockwise direction and thus prevent the dial 3321 from rotating in a clockwise direction. Still referring to fig. 2 and 3, when the driving mechanism 2000 drives the inner tube 210 to move in the opposite direction, a friction force is generated between the first pawl 3311 and the back of the first ratchet teeth, and the friction force causes the unidirectional wheel to rotate in the clockwise direction. At the same time, the second pawl 4000 is caught in the tooth grooves of the second ratchet teeth 3341 so that the second pawl 4000 is engaged with the tooth grooves of the second ratchet teeth 3341 and prevents the ratchet teeth 3340 from rotating clockwise, so that the engagement of the second pawl 4000 with the second ratchet teeth 3341 also hinders the unidirectional wheel in the clockwise direction, so that the unidirectional wheel is kept fixed, and the outer tube 230 is kept fixed. Of course, when the driving mechanism 2000 drives the inner tube 210 to move in the forward direction, the first pawl 3311 of the one-way wheel is engaged with the first ratchet teeth to rotate the one-way wheel in the counterclockwise direction, and the ratchet wheel 3340 is also rotated in the counterclockwise direction, at this time, the second pawl 4000 slides along the back of the second ratchet teeth 3341.

Further, in this embodiment, as shown in fig. 1, the housing 1000 has an inner cavity 1001, and the transmission mechanism 3000 and the second pawl 4000 are both disposed in the inner cavity 1001, so as to avoid exposing these structures, on the one hand, to make the appearance of the handle 100 more neat and attractive, and on the other hand, to avoid errors in the transmission process caused by human error touching of various components.

Preferably, the handle 100 further comprises a guide wheel 5000. As shown in fig. 1, the guide wheel 5000 is disposed in the inner cavity 1001 and rotatably connected to the housing 1000. The guide wheel 5000 is located at the distal end side of the third transmission portion 3300, and a portion of the outer surface of the guide wheel 5000 contacts the pull cord 3322 and is used for guiding the pull cord 3322, so as to avoid sliding friction caused by direct contact between the pull cord 3322 and the inner wall of the housing 1000. It can be appreciated that, when the rotating disc 3321 of the third transmission portion 3300 is rotated to tighten the pull cord 3322, the pull cord 3322 drives the guide wheel 5000 to rotate, so that rolling friction is generated between the two, the friction force applied to the pull cord 3322 is reduced, the friction damage of the pull cord 3322 is further reduced, and the service life of the pull cord 3322 is prolonged. In this embodiment, please continue to refer to fig. 1, a portion of the outer surface of the guiding wheel 5000, which is close to the rack, is in contact with the pulling rope 3322.

In this embodiment, the driving mechanism 2000 is a manual driving device. Specifically, with continued reference to fig. 1, the housing 1000 is provided with axially extending sliding grooves (not shown). The driving mechanism 2000 includes an operation portion 2100 and a connection portion 2200, the operation portion 2100 is provided outside the housing 1000 and is used to receive an external force, one end of the connection portion 2200 is connected to the operation portion 2100, and the other end passes through the sliding groove and is connected to the first transmission portion 3100 (i.e., the rack). When the operation portion 2100 receives an external force directed distally along the proximal end, the operation portion 2100 moves in the sliding groove in the proximal-to-distal direction, thereby driving the rack to move in the proximal-to-distal direction (i.e., the positive direction). When the operation portion 2100 receives an external force directed proximally along the distal end, the operation portion 2100 moves in the sliding groove in the distal-to-proximal direction, thereby driving the rack to move in the distal-to-proximal direction (i.e., the opposite direction). Of course, in alternative implementations, the drive mechanism may be an electric drive, or may be another drive, so long as it is capable of driving the rack to reciprocate axially (i.e., move proximally to the distal end, or move proximally to the distal end).

Further, the embodiment of the present invention also provides a conveying device, which is the conveying device 10.

Furthermore, the delivery device 10 may also include a seeker 300 and an inner tube end connector 400. Wherein the guide tip 300 is disposed at the distal end of the inner tube 210 for guiding the entire delivery device 10 traveling in the lumen during delivery of the medical stent 20. The inner tube tail connector 400 is connected to the proximal end of the inner tube 210 for communicating the inner tube 210 with other external mechanisms.

Still further, embodiments of the present invention provide a medical system comprising the delivery device 10 and a medical implant having a plurality of apertures disposed therein, with portions of the apertures disposed along an axial direction of the medical implant. The catheter mechanism 200 is used to load the medical implant, and the barbs 220 are selectively inserted into portions of the apertures. Here, the medical implant is preferably a self-expanding medical stent 20, and the medical stent 20 may be formed by braiding a wire.

Although the present invention is disclosed above, it is not limited thereto. Various modifications and alterations of this invention may be made by those skilled in the art without departing from the spirit and scope of this invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A handle, comprising:

a housing;

2. The handle of claim 1, wherein the second transmission portion is coupled to the first transmission portion, the second transmission portion being coupled to the third transmission portion when the drive mechanism drives the first object to move in a forward direction, and uncoupled from the third transmission portion when the drive mechanism drives the first object to move in a reverse direction.

3. The handle of claim 2, wherein the second transmission portion comprises a base, a first power transmission portion, and a first clutch portion, the first power transmission portion and the first clutch portion are both disposed on the base, and the first power transmission portion is connected to the first transmission portion; the third transmission part comprises a second clutch part and a second power transmission part; the second power transmission part is connected with the second clutch part and is also connected with the second target object;

4. A handle according to claim 3, wherein the first transmission portion comprises a rack; the transmission mechanism further comprises a mandrel, and the mandrel is connected to the shell; the base body is a rotating wheel, the rotating wheel is arranged on the mandrel and can rotate relative to the shell, straight teeth are formed on the outer peripheral surface of the rotating wheel, and the straight teeth form the first power transmission part and are meshed with the racks; a counter bore is formed on one end face of the rotating wheel, a first ratchet is formed on the wall of the counter bore, and the first ratchet forms the first clutch part; the second clutch part comprises a unidirectional wheel, and a first pawl is formed on the outer peripheral surface of the unidirectional wheel;

5. The handle of claim 4, wherein the second power transmission portion comprises a dial and a pull cord; the turntable is axially connected with the unidirectional wheel and is kept circumferentially relatively static with the unidirectional wheel; the proximal end of the stay cord is arranged on the outer peripheral surface of the turntable, and the distal end of the stay cord is used for being connected with the second target object.

6. The handle of claim 5, wherein the third transmission further comprises a ratchet wheel axially connected to one of the turntable and the one-way wheel, the ratchet wheel remaining circumferentially relatively stationary with the turntable, and a second ratchet tooth formed on an outer peripheral surface of the ratchet wheel; the handle further includes a second pawl disposed on the housing, the second pawl engaging the second ratchet to prevent rotation of the ratchet in the second direction, or the second pawl disengaging the second ratchet to allow rotation of the ratchet in the first direction.

7. The handle of claim 5, wherein the housing has an interior cavity, the transmission mechanism being disposed in the interior cavity; the handle also comprises a guide wheel, wherein the guide wheel is arranged in the inner cavity and is rotatably connected to the shell; the guide wheel is positioned at the distal end side of the third transmission part, and part of the outer surface of the guide wheel is contacted with the pull rope.

8. The handle according to claim 1, wherein the housing is provided with a sliding groove extending in an axial direction, the driving mechanism comprises an operation portion and a connection portion, the operation portion is located outside the housing, one end of the connection portion is connected with the operation portion, and the other end of the connection portion passes through the sliding groove and is connected with the first transmission portion.

9. A conveying apparatus, comprising:

a handle as claimed in any one of claims 1 to 8; the method comprises the steps of,

10. A medical system, comprising:

the delivery device of claim 9, the catheter mechanism for loading the medical implant, and the free ends of the barbs being selectively inserted into portions of the aperture.

11. The medical system of claim 10, wherein the medical implant is a self-expanding medical stent.