CN114983646A - Conveying device and medical system - Google Patents

Abstract

The invention provides a conveying device and a medical system, wherein the conveying device comprises a handle, a stabilizing pipe and a driving part of a loading and releasing pipe machine; the stabilizing tube is connected to the distal end of the handle; the proximal end of the loading and releasing tube penetrates through the stabilizing tube and extends to the interior of the handle, the loading and releasing tube comprises an inner tube and an outer tube, and the proximal end of the inner tube is connected with the handle; the outer pipe is sleeved on part of the outer peripheral surface of the inner pipe; the driving part is arranged on the handle and connected with the near end of the outer tube and is used for driving the outer tube to axially move relative to the inner tube and the stabilizing tube. When the stent is conveyed and released by the conveying device, the positioning accuracy of the stent can be improved, and the form of the released stent is improved.

Description

Conveying device and medical system

Technical Field

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

Background

There are a number of alternative medical devices currently on the market for endovascular treatment. These include stents, volume reduction and embolectomy, among others. Among them, the stent has a very wide application as one of the methods for the treatment in the lumen of blood vessels. The stent needs to be delivered and released within the lumen of the vessel by a delivery device during application.

A delivery device for a stent generally includes a handle assembly and a tube assembly, the tube assembly including at least an inner tube and an outer tube, the stent being loaded between the inner and outer tubes, the handle assembly including a housing adapted to be gripped and a drive portion for controlling axial relative movement between the outer and inner tubes to release the stent. In the operation process, an operator constructs a passage by using the guide wire, sleeves the inner tube on the guide wire so that the far end of the conveying device can reach a lesion part along the guide wire, then positions the stent, and finally drives the inner tube and the outer tube to generate axial relative motion by controlling the driving part to complete the release of the stent. The stability of the motion of the outer and/or inner tube is maintained during stent release to ensure accurate positioning during stent release and to maintain a good morphology after stent release. However, when the existing delivery device drives the inner tube and/or the outer tube to move, the inner tube or the outer tube is often straightened due to stress, so that the stent is inaccurately positioned, and the condition that the distal end of the stent is accumulated to cause the shape of the stent to be poor after the stent is released occurs.

Disclosure of Invention

The invention aims to provide a conveying device and a medical system, and aims to improve the positioning accuracy in the stent releasing process and improve the shape of the released stent.

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

a handle;

a stabilizing tube connected to a distal end of the handle;

the proximal end of the loading release pipe penetrates through the stabilizing pipe and extends to the interior of the handle, the loading release pipe comprises an inner pipe and an outer pipe, the proximal end of the inner pipe is connected with the handle, and the outer pipe is sleeved on part of the outer peripheral surface of the inner pipe; and the number of the first and second groups,

and the driving part is arranged on the handle, is connected with the near end of the outer tube and is used for driving the outer tube to axially move relative to the inner tube and the stabilizing tube.

Optionally, the inner tube comprises a first loading section and an ejector disposed at a proximal side of the first loading section, the ejector having an outer diameter greater than an outer diameter of the first loading section; the outer tube includes a second loading section and a non-loading section disposed on a proximal side of the second loading section, an outer diameter of the second loading section is larger than an outer diameter of the non-loading section, and the second loading section is configured to at least partially overlap the first loading section in an axial direction such that a loading space is formed between an inner circumferential surface of the second loading section and an outer circumferential surface of the first loading section.

Optionally, the outer diameter of the second loading section is 116% -117% of the outer diameter of the non-loading section; and/or the outer diameter of the stabilizing tube is 100-110% of the outer diameter of the second loading section.

Optionally, the inner tube comprises an inner tube comprising the first loading section and a top tube fitted over the inner tube and located on a proximal side of the first loading section such that the top tube constitutes the ejector; the near end of the inner tube body and the near end of the top tube are both connected with the handle.

Optionally, the handle comprises a housing; the driving part comprises a first roller, a second roller, a sliding part and a pull wire, the first roller and the second roller are both rotatably arranged on the shell, the sliding part is movably arranged on the shell and connected with the outer tube, one end of the pull wire is connected with the sliding part, and the other end of the pull wire bypasses the second roller and is also wound on the first roller;

when the first roller wheel rotates along the preset direction, the first roller wheel applies a pulling force which points to the near end along the far end to the sliding part through the pulling force, so that the sliding part is driven to move on the shell along the direction from the far end to the near end, and the outer tube is driven to move along the direction from the far end to the near end.

Optionally, the second roller is located at a proximal end side of the first roller, and the other end of the pull wire passes around the second roller, is folded back, and is wound around the first roller.

Optionally, the first roller is partially disposed inside the housing, and the second roller, the sliding portion and the pulling wire are all disposed inside the housing; the conveying device further comprises a guide mechanism, the guide mechanism is arranged in the shell and extends along the direction from the far end to the near end, and the sliding part is arranged on the guide mechanism and used for moving along the guide mechanism.

Optionally, the housing is further provided with a guide groove extending from the distal end to the proximal end, and the driving portion further includes a first operating portion connected to the sliding portion, and the first operating portion partially penetrates through the guide groove and extends to the outside of the housing.

Optionally, the handle further comprises a stress spreader tube connected to the distal end of the housing; the stress diffusion pipe is sleeved at the proximal end of the stabilizing pipe and keeps static relative to the stabilizing pipe; the conveying device further comprises a baffle and a guide rod, the baffle is arranged in the shell, and a sliding groove extending from the far end to the near end is formed in the baffle; the far end of the guide rod is connected with the stress diffusion tube, the near end of the guide rod is connected with the near end of the shell, and the guide rod and the sliding groove form the guide mechanism; the sliding part comprises a first connecting hole, the sliding part is sleeved on the guide rod through the first connecting hole, and the sliding part is also partially arranged in the sliding groove.

Optionally, the baffle includes a baffle body and two ribs, the number of the ribs is two, the two ribs extend along the direction from the far end to the near end, the two ribs are arranged at intervals in the direction perpendicular to the guide rod, and the space between the two ribs constitutes the chute.

Optionally, a plurality of notches are formed on the rib for releasing from the sliding part, and are sequentially arranged along a distal end to a proximal end direction.

Optionally, the handle comprises a housing and a stress diffusion tube, the stress diffusion tube is connected to the distal end of the housing, sleeved on the outer peripheral surface of the proximal end of the stabilizing tube and kept stationary relative to the stabilizing tube; the stress diffusion tube is provided with a second connecting hole which extends in an axial through manner and comprises a near-end hole section and a far-end hole section which are axially connected, the inner diameter of the near-end hole section is larger than that of the far-end hole section, and the inner wall of the near-end hole section is also provided with a first circumferential limiting part;

the stabilizing pipe comprises a stabilizing pipe body and a stabilizing pipe connecting piece arranged at the near end of the stabilizing pipe body, and a second circumferential limiting piece is arranged on the outer circumferential surface of the stabilizing pipe body; the proximal end of the stabilizing pipe body is inserted into the distal end hole section of the second connecting hole, the stabilizing pipe connecting piece is arranged in the proximal end hole section of the second connecting hole, and the second circumferential limiting piece is connected with the first circumferential limiting piece in a matched mode.

Optionally, the conveying device further comprises a one-way control mechanism for preventing the first roller from rotating in the direction opposite to the predetermined direction.

Optionally, the one-way control mechanism comprises a check wheel and a pawl, the check wheel is arranged on the shell, is positioned in the shell and keeps relatively static with the shell, and the check wheel is provided with a ratchet; the pawl is connected to the first roller, and the pawl is configured to selectively engage with and disengage from the ratchet teeth, prevent the first roller from rotating in a direction opposite to the predetermined direction when the pawl is engaged with the ratchet teeth, and allow the first roller to rotate in the predetermined direction when the pawl is disengaged from the ratchet teeth.

Optionally, the conveying device further comprises a limiting part, and the limiting part is selectively connected with or disconnected from the sliding part; when the limiting part is connected with the sliding part, the sliding part and the shell keep relatively static so as to prevent the driving part from driving the outer tube to move relative to the inner tube and the stabilizing tube, and when the sliding part is disconnected with the shell, the sliding part is allowed to slide on the shell so as to allow the driving part to drive the outer tube to move relative to the inner tube and the stabilizing tube.

Optionally, the sliding part is disposed within the housing; be equipped with on the casing and dodge the groove, be equipped with first draw-in groove on the sliding part, spacing portion includes interconnect's second operation portion and fixture block, the second operation portion sets up the outside of casing, the fixture block is used for passing dodge the groove and insert first draw-in groove.

Optionally, a fourth connecting hole is formed in the sliding portion, a third circumferential limiting piece is arranged on a hole wall of the fourth connecting hole, two second clamping grooves are further formed in the outer wall of the sliding portion, and the two second clamping grooves are symmetrically arranged in the circumferential direction of the fourth connecting hole;

the outer pipe comprises an outer pipe body and an outer pipe connecting piece arranged on the outer pipe body, the outer pipe connecting piece comprises a sleeve and a clamping jaw, a fourth circumferential limiting piece is arranged on the outer circumferential surface of the sleeve, and the clamping jaw is connected with the sleeve; the sleeve is inserted into the fourth connecting hole, the fourth circumferential limiting part is connected with the third circumferential limiting part in a matched mode, and one of the clamping jaws is inserted into one of the second clamping grooves.

To achieve the above object, the present invention also provides a medical system comprising a medical implant and a delivery device as described in any of the previous items; the medical implant is for loading between the inner tube and the outer tube.

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

the conveying device comprises a handle, a stabilizing pipe, a loading and releasing pipe and a driving part; wherein the stability tube is connected to the distal end of the handle; the proximal end of the loading release tube passes through the stabilizing tube and extends to the interior of the handle, the loading release tube comprises an inner tube and an outer tube, and the proximal end of the inner tube is connected with the handle; the outer pipe is sleeved on part of the outer peripheral surface of the inner pipe; the driving part is arranged on the handle and connected with the near end of the outer tube, and is used for driving the outer tube to axially move relative to the inner tube and the stabilizing tube. A loading space is formed between part of the outer circumferential surface of the inner tube and part of the inner circumferential surface of the outer tube for loading a medical implant, so that the delivery device can be used for delivering and releasing the medical implant, such as a stent, and the stent is loaded in the loading space. When the medical stent reaches the lesion position of a blood vessel, the outer tube is driven by the driving part to move relative to the inner tube and the stabilizing tube along the far end and the near end so as to achieve the purpose of releasing the stent. The conveying device is provided with the stabilizing tube, and the stabilizing tube is used for providing a stable moving channel for the outer tube, so that the outer tube is prevented from being straightened in the process of moving from the far end to the near end, the outer tube and the blood vessel can keep better coaxiality, and the situation that the inner tube is straightened along with the outer tube to cause the displacement of the stent when the stent is released or the far end of the stent is accumulated is avoided.

Further, the inner tube includes a first loading section and an ejection portion provided on a proximal end side of the first loading section, an outer diameter of the ejection portion is larger than an outer diameter of the first loading section, and the outer tube includes a second loading section and a non-loading section provided on a proximal end side of the second loading section, an outer diameter of the second loading section is larger than an outer diameter of the non-loading section, and the second loading section is at least partially overlapped with the first loading section in an axial direction such that the loading space is formed between an inner peripheral surface of the second loading section and an outer peripheral surface of the first loading section. So configured, the outer diameter of the stabilizer tube may be made equal to or slightly larger than the outer diameter of the second loading section of the outer tube, so that the outer diameter of the stabilizer tube is not too large, which is advantageous for constructing an integrated delivery channel using a delivery sheath with a smaller radial dimension, such as a 6F delivery sheath, so that the introduction portion of the delivery device (i.e., the portion introduced into the patient, including in particular the portion structure of the inner tube, the portion structure of the outer tube, and at least the portion structure of the stabilizer tube) can more easily enter the patient.

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 diagram of a delivery device according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a portion of a delivery device according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a portion of a delivery device according to an embodiment of the present invention, where FIG. 3 is different from FIG. 2;

FIG. 4 is a cross-sectional view at A of the delivery device shown in FIG. 3;

FIG. 5 is a schematic, fragmentary, pictorial illustration of a delivery device according to an embodiment of the present invention, with a portion of the housing removed and showing primarily the manner in which the inner tube is connected to the housing;

FIG. 6 is a partial schematic structural view of a delivery device of the present invention in accordance with an embodiment, with a portion of the housing removed and showing primarily a proximal portion of the inner tube and a proximal section of the top tube in phantom;

FIG. 7 is a partial block diagram of a delivery device according to an embodiment of the present invention with a portion of the housing of the handle removed;

FIG. 8 is a cross-sectional view B-B of the delivery device shown in FIG. 7;

FIG. 9 is a C-C cross-sectional view of the delivery device shown in FIG. 7;

FIG. 10 is a schematic view of a portion of a delivery device according to one embodiment of the present invention, showing a stabilizing tube and a load release tube;

FIG. 11 is a schematic, fragmentary, pictorial illustration of a delivery device, with a portion of the housing removed, in accordance with an embodiment of the present invention;

FIG. 12 is a partial schematic structural view of a delivery device according to an embodiment of the present invention, illustrating primarily the manner in which the stabilizer tube is connected to the stress diffusion tube;

FIG. 13 is a partial schematic structural view of a handle of a delivery device provided in accordance with an embodiment of the invention, with a portion of the housing removed and showing primarily the relationship of the second roller to the pull wire;

FIG. 14 is a partial schematic view of a delivery device according to an embodiment of the present invention, showing primarily the connection of the outer tube to the slide;

FIG. 15 is a schematic view of a partial structure of a conveying device according to an embodiment of the present invention, showing the positional relationship among the position limiting portion, the housing, the baffle, the guide rod, the sliding portion, and the pulling wire;

FIG. 16 is a schematic view of the handle of the delivery device of the present invention with a portion of the housing removed and the guide rod shown in full, according to one embodiment;

FIG. 17 is a schematic diagram of a baffle plate of a conveyor according to an embodiment of the invention;

FIG. 18 is a partial schematic structural view of a delivery device in accordance with an embodiment of the present invention, illustrating primarily a one-way control mechanism;

fig. 19 is a schematic partial structural diagram of a conveying device according to an embodiment of the present invention, in which the position relationship between the limiting portion and the blocking plate and the sliding portion is shown.

[ reference symbols are explained below ]:

1000-handle, 1100-housing, 1110-guide groove, 1120-avoiding groove, 1200-stress-diffusing tube, 1210-second connecting hole, 1211-proximal hole section, 1212-distal hole section, 1213-first circumferential stop, 1220-third connecting hole, 2000-stabilizing tube, 2100-stabilizing tube body, 2200-stabilizing tube connecting piece, 2210-second circumferential stop, 3000-load-releasing tube, 3100-inner tube, 3101-first loading section, 3110-inner tube body, 3120-top tube, 3121-top head, 3122-proximal section, 3123-distal section, 3130-inner tube connecting piece, 3200-outer tube, 3201-second loading section, 3202-non-loading section, 3210-outer tube body, 3220-outer tube connecting piece, 3221-sleeve, 3222-pawl, 4000-driving part, 4100-first roller, 4200-second roller, 4300-sliding part, 4310-fourth connecting hole, 4311-third circumferential limiting part, 3223-fourth circumferential limiting part, 4320-second clamping groove, 4330-first threading hole, 4340-second threading hole, 4350-first connecting hole, 4360-first clamping groove, 4400-threading, 4500-first operating part, 5100-guide rod, 5200-baffle, 5210-sliding groove, 5220-baffle body, 5230-rib, 5231-notch, 5240-baffle part, 6100-non-return wheel, 6110-ratchet, 6200-pawl, 6300-central shaft, 7000-limiting part, 7100-second operating part, 7200-clamping block, 8000-head; 10-a stent.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.

Furthermore, each of the embodiments described below has one or more technical features, and thus, the use of the technical features of any one embodiment does not necessarily mean that all of the technical features of any one embodiment are implemented at the same time or that only some or all of the technical features of different embodiments are implemented separately. In other words, those skilled in the art can selectively implement some or all of the features of any embodiment or combinations of some or all of the features of multiple embodiments according to the disclosure of the present invention and according to design specifications or implementation requirements, thereby increasing the flexibility in implementing the invention.

As used in this specification, the singular forms "a", "an" and "the" include plural referents and the plural forms "a plurality" includes more than two 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, e.g., as meaning either fixedly connected, detachably connected, or integrally connected. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Further, as used herein, the terms "proximal" and "distal" refer to the relative orientation, relative position, and orientation of elements or actions with respect to one another from the perspective of a clinician using the medical device, and although "proximal" and "distal" are not intended to be limiting, the term "proximal" generally refers to the end of the medical device that is closer to the clinician during normal operation, and the term "distal" generally refers to the end that is first introduced into a patient.

To further clarify the objects, advantages and features of the present invention, a more particular description of the invention will be rendered by reference to the appended drawings. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. The same or similar reference numbers in the drawings identify the same or similar elements.

Fig. 1 is a schematic structural diagram of a conveying device according to an embodiment of the present invention, fig. 2 and 3 are schematic diagrams illustrating different regions of the conveying device, and fig. 4 is an enlarged schematic diagram of a point a in fig. 3. As shown in fig. 1 to 4, the delivery device includes a handle 1000, a stabilizing tube 2000, a loading release tube 3000, and a driving portion 4000 (not shown in fig. 1 to 4, please refer to fig. 11). Wherein the stabilization tube 2000 is connected to the distal end of the handle 1000. The proximal end of the charge release tube 3000 passes through the stabilization tube 2000 and extends into the interior of the handle 1000, and the charge release tube 3000 includes an inner tube 3100 and an outer tube 3200. The proximal end of the inner tube 3100 is connected to the handle 1000. The outer tube 3200 is fitted over part of the outer circumferential surface of the inner tube 3100. The driving portion 4000 is disposed on the handle 1000 and connected to the proximal end of the outer tube 3200, and the driving portion 4000 is used for driving the outer tube 3200 to move axially relative to the inner tube 3100 and the stabilizing tube 2000.

Preferably, the inner tube 3100 includes a first loading section 3101 and an ejector (not labeled in the figures) disposed on a proximal side of the first loading section 3101 and having an outer diameter greater than an outer diameter of the first loading section 3101. A partial structure of the outer tube 3200 is configured to axially overlap with the first loading section 3101, so that a loading space is formed between an inner circumferential surface of the outer tube 3200 and an outer circumferential surface of the first loading section 3101.

The delivery device is used to load and deliver and release a medical implant at a lesion site within a blood vessel. The medical implant includes, but is not limited to, a stent 10 (shown in fig. 2), and the medical implant is exemplified as the stent 10 herein. In addition, in the embodiment of the present invention, the inner tube 3100 and the stabilizing tube 2000 are kept relatively stationary with respect to the handle 1000 during the use, and the outer tube 3200 can move axially with respect to the handle 1000, so that the outer tube 3200 can move axially with respect to the inner tube 3100 and the stabilizing tube 2000. Thus, the process of loading, delivering and releasing the stent 10 using the delivery device is generally: first, the stent 10 is loaded into the loading space of the delivery device, and the proximal end of the stent 10 is brought into contact with the distal end of the ejector. Thereafter, the distal end of the delivery device is introduced into the vessel using conventional methods, and the stent 10 is positioned at the site of the lesion. Finally, the operator manipulates the driving part 4000 to drive the outer tube 3200 to move in a distal direction and a proximal direction relative to the inner tube 3100, so as to release the stent 10.

During the release of the stent 10, the outer tube 3200 is inserted into the stabilization tube 2000 and moves along the inner lumen of the stabilization tube 2000. Because the stabilizing tube 2000 does not move in the process, the stabilizing tube 2000 can keep better coaxiality with the blood vessel, so that the outer tube 3200 can keep better coaxiality with the blood vessel when moving along the inner cavity of the stabilizing tube 2000, the outer tube 3200 is prevented from being straightened and attached to the wall, and the situation that the inner tube 3100 is straightened as the outer tube 3200 extrudes the inner tube 3100 is avoided. As will be appreciated by those skilled in the art, if the inner tube 3100 is straightened, the distal end of the inner tube 3100 and the distal end of the ejection portion move in a proximal-to-distal direction, which drives the stent 10 to move in a proximal-to-distal direction away from the lesion site, and causes the distal end of the stent 10 to be piled up, thereby affecting the released shape of the stent 10. In other words, in the embodiment of the present invention, the positioning accuracy of the stent 10 when released is improved and the shape of the stent 10 after release is improved by the arrangement of the stabilizer tube 2000.

Preferably, the outer tube 3200 includes a second loading section 3201 and a non-loading section 3202 disposed on a proximal side of the second loading section 3201, an outer diameter of the second loading section 3201 being larger than an outer diameter of the non-loading section 3202. The second loading segment 3201 is configured to axially at least partially overlap the first loading segment 3101 such that the loading space is formed between an inner circumferential surface of the second loading segment 3201 and an outer circumferential surface of the first loading segment 3101. Upon release of the stent 10, the non-loading segment 3202 moves along the stability tube 2000. This has the advantage of reducing the radial dimension of the stabilizer tube 2000, and thus the introduction portion of the delivery device, so that the distal end of the delivery device can be introduced into the patient through a delivery sheath having a smaller radial dimension, such as a 6F delivery sheath. Here, the introduction portion refers to a portion of the delivery device for entering into the patient, and specifically includes a partial structure of the inner tube 3100, a partial structure of the outer tube 3200, and at least a partial structure of the stabilization tube 2000.

Optionally, the outer diameter of the second loading section 3201 is 116% -117% of the outer diameter of the non-loading section 3202. The outer diameter of the stabilizing tube 2000 is 100% -110% of the outer diameter of the second loading section 3201. Taking the delivery sheath as a 6F delivery sheath as an example, the outer diameter of the second loading section 3201 can be calculated to be 16.7% of the outer diameter of the non-loading section 3202, in combination with the outer diameter of the inner tube 3100 and the wall thickness of the outer tube 3200.

Alternatively, as shown in fig. 2-4, inner tube 3100 can comprise an inner tube 3110 and a top tube 3120, inner tube 3110 comprising first loading section 3101. Top tube 3120 fits over inner tube 3110 and is proximal to first loading section 3101, i.e. top tube 3120 constitutes the ejector. It is understood that the distal end of the top tube 3120 is also preferably formed with a top head 3121 having a cross section gradually increasing from the proximal end to the distal end, and the proximal end of the inner tube 3110 and the proximal end of the top tube 3120 are connected to the handle 1000.

Optionally, with continued reference to fig. 1 in conjunction with fig. 5, the handle 1000 includes a housing 1100, the housing 1100 having an inner lumen, the proximal end of the inner tube 3100 extending into the inner lumen and being connected to the proximal end of the housing 1100. Specifically, the inner tube 3100 further includes an inner tube connector 3130, the inner tube connector 3130 is connected to a proximal end of the inner tube body 3110 and a proximal end of the top tube 3120, and the inner tube connector 3130 is connected to a proximal end of the casing 1100.

Further, as shown in fig. 6 to 9, the top tube 3120 may include a proximal end section 3122 and a distal end section 3123 that are axially connected, and preferably, the stiffness of the distal end section 3123 is less than the stiffness of the proximal end section 3122, for example, the distal end section 3123 is a polymer tube, so that the distal end section 3123 is easier to bend to conform to the shape of a blood vessel, and the proximal end section 3122 may be a steel tube, so that the proximal end section 3122 has better stiffness in the casing 1100. As such, the proximal section 3122 is connected to the inner tube connector 3130.

Referring back to fig. 1 in conjunction with fig. 10 and 11, the handle 1000 further includes a stress diffusion tube 1200, wherein the stress diffusion tube 1200 is connected to the distal end of the housing 1100, and is sleeved on the outer peripheral surface of the proximal end of the stabilizing tube 2000, and is kept stationary relative to the stabilizing tube 2000. Referring to fig. 12, a second connection hole 1210 is disposed on the stress diffusion tube 1200, the second connection hole 1210 extends through the stress diffusion tube 1200 in the axial direction and includes a proximal hole section 1211 and a distal hole section 1212 that are axially connected, and the inner diameter of the proximal hole section 1211 is larger than the inner diameter of the distal hole section 1212, so that the second connection hole 1210 is a stepped hole. The stabilizer tube 2000 includes a stabilizer tube body 2100 and a stabilizer tube connector 2200 disposed at a proximal end of the stabilizer tube body 2100. The proximal end of the stabilizing tube body 2100 is inserted into the distal hole section 1212 of the second coupling hole 1210 and the stabilizing tube connector 2200 is inserted into the proximal hole section 1211 of the second coupling hole 1210, and the stabilizing tube connector 2200 and the stress diffusing tube 1200 may be maintained to be axially relatively stationary by a frictional force between the stabilizing tube connector 2200 and the proximal hole section 1211. Preferably, a second circumferential stop 2210 is further disposed on the outer circumferential surface of the stabilizer tube connector 2200, a first circumferential stop 1213 is further disposed on the inner wall of the proximal bore section 1211, one of the second circumferential stop 2210 and the first circumferential stop 1213 is a protrusion, and the other is a groove, for example, the first circumferential stop 1213 is a protrusion, and the second circumferential stop 2210 is a groove, into which the protrusion is inserted, so as to keep the relative circumferential rest between the stabilizer tube connector 2200 and the stress diffusion tube 1200. In this manner, the stability tube connector 2200 remains relatively stationary with the strain diffusion tube 1200 and, thus, the stability tube 2000 remains relatively stationary with the handle 1000. Those skilled in the art will appreciate that alternative embodiments may employ other means for maintaining the stress diffusion tube 1200 and the stability tube connector 2200 stationary relative to one another, such as by bonding the stress diffusion tube 1200 and the stability tube connector 2200 with an adhesive.

Referring to fig. 1, 10, 11, and 13 to 15, the driving portion 4000 includes a first roller 4100, a second roller 4200, a sliding portion 4300, and a pulling wire 4400. The first roller 4100 is rotatably disposed on the housing 1100, and a portion of the first roller 4100 is located in the inner cavity of the housing 1100, and another portion of the first roller 4100 protrudes outside the housing 1100. The second roller 4200 is rotatably disposed on the housing 1100 and is located in the inner cavity of the housing 1100. The sliding part 4300 is movably disposed on the housing 1100 and located in the inner cavity of the housing 1100, and the sliding part 4300 is further connected to the proximal end of the outer tube 3200. The pulling wire 4400 has a first end and a second end opposite to each other, the first end is connected with the sliding part 4300, and the second end passes around the second roller 4200 and is further wound on the first roller 4100. When the first roller 4100 rotates in a predetermined direction, the first roller 4100 applies a pulling force pointing to the sliding portion 4300 in a distal direction to the proximal direction through the pulling wire 4400, and drives the sliding portion 4300 to move on the housing 1100 in the distal direction to the proximal direction, so as to drive the outer tube 3200 to move in the distal direction to the proximal direction, thereby releasing the holder 10. Optionally, the second roller 4200 is located at a proximal side of the first roller 4100 (as shown in fig. 11), and the second end of the wire 4400 is wrapped around the second roller 4200 and then folded back, and then wrapped around the first roller 4100. By changing the extending direction of the pulling wire 4400 by providing the second roller 4200, the friction of the driving portion 4000 in the process of driving the outer tube 3200 to move in the distal direction to the proximal direction is reduced, so that the external force required to be applied when releasing the stent 10 is reduced, and the operation is facilitated. It should be understood that the pulling wire 4400 should be in a tightened state at all times, so that once the first roller 4100 is rotated in the predetermined direction, the sliding part 4300 can be driven by the pulling wire 4400 to move in a distal direction to a proximal direction.

Alternatively, the coefficient of friction of the outer surface of the second roller 4200 for contacting the pulling wire 4400 may be less than 0.2. In some embodiments, the surface of the second roller 4200 in contact with the pull wire 4400 is ground to a coefficient of friction less than 0.2, or in other embodiments, the second roller 4200 includes a second roller body (not shown) and a lubricant layer (not shown) disposed on the second roller body for contacting the pull wire 4400, the lubricant layer may be PTFE or other material with a lower coefficient of friction.

Further, the sliding portion 4300 may be coupled to the outer tube 3200 in any suitable manner. Referring to fig. 14, in an alternative implementation manner, a fourth connection hole 4310 is formed on the sliding portion 4300, and the fourth connection hole 4310 is a through hole. The outer wall of the sliding portion 4300 is further provided with a plurality of second locking grooves 4320, for example, two second locking grooves 4320 are provided, and the two second locking grooves 4320 are symmetrically disposed in the circumferential direction of the fourth connecting hole 4310. The outer tube 3200 comprises an outer tube body 3210 and an outer tube connecting member 3220, wherein the outer tube body 3210 comprises the second loading section 3201 and the non-loading section 3202, and the outer tube connecting member 3220 is disposed at a proximal end of the outer tube body 3210, in particular, at a proximal end of the non-loading section 3202. The outer tube connecting part 3220 includes a sleeve 3221 and two claws 3222, the claws 3222 are connected to the sleeve 3221, and the claws 3222 and the second locking grooves 4320 are correspondingly disposed, that is, when the number of the second locking grooves 4320 is two, the number of the claws 3222 is also two, and the two claws 3222 are symmetrically disposed in the circumferential direction of the sleeve 3221. The sleeve 3221 is sleeved over the outer tube body 3210 and held stationary relative to the outer tube body 3210 by any suitable means, such as gluing. The sleeve 3221 is inserted into the fourth connecting hole 4310, and one of the claws 3222 is inserted into one of the second catching grooves 4320, so that the outer tube connecting element 3220 and the sliding portion 4300 are kept axially stationary. Further, a third circumferential limiting part 4311 is disposed on a hole wall of the fourth connecting hole 4310, a fourth circumferential limiting part 3223 is disposed on an outer circumferential surface of the sleeve 3221, one of the third circumferential limiting part 4311 and the fourth circumferential limiting part 3223 is a groove, and the other is a protrusion, for example, the third circumferential limiting part 4311 is a groove disposed on a hole wall of the fourth connecting hole 4310, the fourth circumferential limiting part 3223 is a protrusion disposed on an outer circumferential surface of the sleeve 3221, and the protrusion is clamped into the groove, so that the outer tube connecting part 3220 and the sliding part 4300 keep circumferentially relatively stationary.

The first end of the pull wire 4400 may be coupled to the sliding portion 4300 in any suitable manner. Referring to fig. 14 and 15, the sliding portion 4300 is provided with a first threading hole 4330 and a second threading hole 4340, a proximal end of the first threading hole 4330 is an open end, and the first threading hole 4330 and the fourth connection hole 4310 are parallel to each other but not communicated with each other. The axis of the second threading hole 4340 is perpendicular to the axis of the first threading hole 4330, and the second threading hole 4340 is communicated with the first threading hole 4330. The first end of the pulling wire 4400 sequentially passes through the first threading hole 4330 and the second threading hole 4340, and the connection between the pulling wire 4400 and the sliding portion 4300 can be achieved by knotting or banding or any other suitable means.

Further, the delivery device further comprises a guiding mechanism (not shown) disposed within the lumen of the housing 1100 and extending in a distal to proximal direction. The sliding portion 4300 is provided on the guide mechanism and is adapted to move along the guide mechanism.

Alternatively, referring to fig. 14 to 16, the guiding mechanism includes a guide bar 5100, a distal end of the guide bar 5100 is connected to the stress diffusion tube 1200, and a proximal end of the guide bar 5100 is connected to a proximal end of the housing 1100. The sliding portion 4300 is provided with a first connection hole 4350, and the first connection hole 4350 and the fourth connection hole 4310 are parallel to each other but not communicated with each other. The sliding portion 4300 is fitted over the guide bar 5100 through the first connection hole 4350, and slides along the guide bar 5100. Here, as shown in fig. 12, a third connection hole 1220 is further formed on the stress diffusion tube 1200, the third connection hole 1220 extends in the axial direction and is isolated from the second connection hole 1210, and a proximal end of the third connection hole 1220 is an open end. The distal end of the guide bar 5100 is inserted into the third connection hole 1220 to achieve connection of the guide bar 5100 with the stress diffusion tube 1200.

Further, with continuing reference to fig. 15 in conjunction with fig. 17, the delivery device further includes a baffle 5200, wherein the baffle 5200 is disposed in the inner cavity of the housing 1100 and is connected to the housing 1100. The baffle 5200 is provided with a chute 5210 connected from the distal end to the proximal end. As such, the sliding portion 4300 is partially disposed within the chute 5210, so that the sliding portion 4300 also moves along the chute 5210. That is, the runner 5210 and the guide bar 5100 together constitute the guide mechanism. This has the advantage that the sliding portion 5300 is guided by the slide groove 5210 together with the guide bar 5100, so that the sliding portion 4300 is prevented from swinging circumferentially along the guide bar 5100 during movement.

Alternatively, with continued reference to fig. 17, the barrier 5200 includes a barrier body 5220, the barrier body 5220 is provided with two ribs 5230 extending from a distal end to a proximal end, the two ribs 5230 are spaced apart from each other in a direction perpendicular to the guide 5100, and a space between the two ribs 5230 forms the sliding slot 5210. Further, at least one of the ribs 5230 is formed with a notch 5231 sequentially arranged along a distal direction to a proximal direction, and specifically, the rib 5230 always contacting the sliding portion 4300 is provided with the notch 5231, so as to reduce a contact area between the rib 5230 and the sliding portion 4300, and further reduce friction force generated when the sliding portion 4300 moves along the guide mechanism.

Further, referring to fig. 1 and 10, the housing 1100 is further provided with a guide channel 1110, and the guide channel 1110 extends in a distal direction to a proximal direction. The driving portion 4000 further includes a first operating portion 4500, the first operating portion 4500 is connected to the sliding portion 4300, and the first operating portion 4500 partially passes through the guide groove 1110 and extends to the outside of the housing 1100. Thus, the operator can directly apply a force to the first operating portion 4500 in a distal-to-proximal direction to push the sliding portion 4300 in a distal-to-proximal direction.

Further, referring to fig. 6, 16 and 18, the conveying device further includes a one-way control mechanism 6000, and the one-way control mechanism 6000 is configured to prevent the first roller 4100 from rotating in a direction opposite to the predetermined direction. That is, by being provided at the one-way control mechanism 6000, the first roller 4100 can be rotated only in the predetermined direction. This arrangement prevents the driving portion 4000 from driving the sliding portion 4300 to move in the proximal-to-distal direction by the rotation of the first roller 4100, and also prevents the outer tube 3200 from moving in the proximal-to-distal direction by the rotation of the first roller 4100, and prevents the wire 4400 from being loosened by the rotation of the first roller 4100 in the opposite direction of the predetermined direction.

Optionally, the one-way control mechanism 6000 includes a check wheel 6100 and a pawl 6200. The check wheel 6100 is disposed on the housing 1100 and located in the inner cavity of the housing 1100, and the check wheel 6100 also remains relatively stationary with the housing 1100. The check wheel 6100 may be connected to the housing 1100 by any suitable method, for example, the unidirectional control mechanism 6000 further includes a central shaft 6300, the central shaft 6300 is fixedly connected to the housing 1100, and the check wheel 6100 is fixedly sleeved on the central shaft 6300. Ratchet 6110 is also arranged on the non-return wheel 6100, and the ratchet 6110 is an oblique tooth. The pawl 6200 is connected to the first roller 4100, and the pawl 6200 is selectively engaged with or disengaged from the ratchet teeth 6110. When the pawl 6200 is engaged with the ratchet teeth 6110, the first roller 4100 is prevented from rotating in the opposite direction to the predetermined direction, and when the pawl 6200 is disengaged from the ratchet teeth 6110, the first roller 4100 is allowed to rotate in the predetermined direction. In the present embodiment, please take the orientation shown in fig. 18 as an example, the predetermined direction is a counterclockwise direction, and the opposite direction of the predetermined direction is a clockwise direction. When the first roller 4100 is forced and rotated in the counterclockwise direction, the pawl 6200 always slides along the back of the teeth of the ratchet teeth 6110, and the ratchet teeth 6110 do not cause an obstruction to the movement of the pawl 6200, thereby allowing the first roller 4100 to continuously rotate in the counterclockwise direction. Conversely, when the first roller 4100 is forced to rotate in a clockwise direction, the pawl 6200 slides along the back of teeth of one ratchet tooth 6110 to the intersection of two adjacent ratchet teeth 6110 to engage with the ratchet teeth 6110, so that the check wheel 6100 prevents the pawl 6200 from moving, thereby preventing the first roller 4100 from continuing to rotate in the clockwise direction.

As shown in fig. 1, 10, 11, 15, and 19, the conveying apparatus further includes a stopper 7000, and the stopper 7000 is selectively connected to or disconnected from the slide part 4300. When the stopper 7000 is connected to the sliding portion 4300, the sliding portion 7000 and the housing 1100 are kept stationary relative to each other to prevent the driving portion 4000 from driving the outer tube 3200 to move relative to the inner tube 3100 and the stabilizing tube 2000, and when the sliding portion 4300 is disconnected from the housing 1100, the sliding portion 4300 is allowed to slide on the housing 1100, thereby allowing the driving portion 4000 to drive the outer tube 3200 to move relative to the inner tube 3100 and the stabilizing tube 2000. Optionally, an avoidance slot 1120 (as labeled in fig. 6, 7, and 16) is provided on the housing 1100. As shown in fig. 14, a first locking groove 4360 is disposed on the sliding portion 4300, and the first locking groove 4360 is configured to align with the avoiding groove 1120. The limiting portion 7000 includes a second operation portion 7100 and a latch 7200 connected to each other, the second operation portion 7100 is disposed outside the housing 1100, and the latch 7200 is configured to pass through the avoiding groove 1120 and be inserted into the first latch 4360. That is, when the latch 7200 passes through the avoiding groove 1120 and is inserted into the first locking groove 4360, the stopper 7000 is connected to the sliding portion 4300, and the latch 7200 can prevent the sliding portion 4300 from moving along the housing 1100 under the restriction of the housing 1100.

Optionally, the second operating portion 7100 has a ring structure, so that an operator can apply an acting force to the second operating portion 7100 and pull the limiting portion 7000 out of the first locking groove 4360 and the avoiding groove 1120 and separate from the housing 1100, so as to release the connection between the limiting portion 7000 and the sliding portion 4300. Further, as shown in fig. 17, the baffle 5200 further includes a blocking portion 5240, the blocking portion 5240 is disposed at the proximal end of the baffle body 5220, the blocking portion 5240 is perpendicular to the baffle body 5220, and the proximal end surface of the blocking portion 5240 is configured to abut against the latch 7200.

Based on the structure of the delivery device, the operation of the delivery device when releasing the stent 10 is as follows:

the operator first applies a force to the second operation portion 7100 to pull the stopper portion 7000 from the housing 1100, thereby releasing the connection between the stopper portion 7000 and the sliding portion 4300.

Thereafter, a first stage of releasing is performed, specifically, an operator applies a force to the first roller 4100 to rotate the first roller 4100 in the predetermined direction, and then pulls the sliding portion 4300 through the pulling wire 4400 to move in a distal-to-proximal direction, so as to drive the outer tube 3200 to move in the distal-to-proximal direction through the sliding portion 4300 until the outer tube 3200 reaches a predetermined position. Here, an identification mark may be provided on an outer surface of the housing 1100, and when the first operating portion 4500 reaches the identification mark, it may be determined that the outer tube 3200 reaches a predetermined position. Generally, when the outer tube 3200 reaches the predetermined position, the distal end of the stent 10 is positioned.

Finally, a second stage of release is performed, in particular, the operator applies a force to the first operating portion 4500 to directly push the sliding portion 4300 in the distal-to-proximal direction via the first operating portion 4500 until the stent 10 is completely released.

In the first stage, the first roller 4100 is used to drive the outer tube 3200 to move in the distal direction and the proximal direction through the pulling wire 4400 and the sliding part 4300, so as to control the release speed, so that if the posture of the stent 10 is found to be bad in the process, the withdrawal of the outer tube 3200 can be quickly stopped (i.e., the outer tube 3200 is controlled to move in the distal direction and the proximal direction), and the orientation of the whole conveying device is readjusted to adjust the posture of the stent 10. In the second stage, the sliding portion 4300 is directly driven by the first operation portion 7100 to retract the outer tube 3200, so that the retraction speed of the outer tube 3200 can be increased, and the release speed of the stent 10 can be increased.

It should be noted that, in order to facilitate the assembly of the entire conveying device, the casing 1100 generally includes two sub-casings that are spliced together. In addition, the delivery device includes a guide head 8000, which is attached to the distal end of the inner tube body 3110.

Further, embodiments of the present invention also provide a medical system comprising the medical implant and the delivery device, the medical implant including but not limited to the stent 10, and the medical implant being configured to be loaded between the inner tube 3100 and the outer tube 3200.

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, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (18)

1. A conveyor apparatus, comprising:

a handle;

a stabilizing tube connected to a distal end of the handle;

the proximal end of the loading release pipe penetrates through the stabilizing pipe and extends to the interior of the handle, the loading release pipe comprises an inner pipe and an outer pipe, the proximal end of the inner pipe is connected with the handle, and the outer pipe is sleeved on part of the outer peripheral surface of the inner pipe; and the number of the first and second groups,

the driving part is arranged on the handle and connected with the near end of the outer tube and used for driving the outer tube to axially move relative to the inner tube and the stabilizing tube.

2. The delivery device of claim 1, wherein the inner tube includes a first loading section and a knockout disposed on a proximal side of the first loading section, the knockout having an outer diameter greater than an outer diameter of the first loading section; the outer tube includes a second loading section and a non-loading section disposed on a proximal side of the second loading section, an outer diameter of the second loading section is larger than an outer diameter of the non-loading section, and the second loading section is configured to at least partially overlap the first loading section in an axial direction such that a loading space is formed between an inner circumferential surface of the second loading section and an outer circumferential surface of the first loading section.

3. The transfer device of claim 2, wherein the outer diameter of the second loading section is 116% to 117% of the outer diameter of the non-loading section; and/or the outer diameter of the stabilizing tube is 100-110% of the outer diameter of the second loading section.

4. The delivery device of claim 2, wherein the inner tube comprises an inner tube comprising the first loading section and a top tube that fits over the inner tube and is located on a proximal side of the first loading section such that the top tube constitutes the ejector; the near end of the inner tube body and the near end of the top tube are both connected with the handle.

5. The delivery device of any of claims 1-4, wherein the handle comprises a housing; the driving part comprises a first roller, a second roller, a sliding part and a pull wire, the first roller and the second roller are both rotatably arranged on the shell, the sliding part is movably arranged on the shell and connected with the outer tube, one end of the pull wire is connected with the sliding part, and the other end of the pull wire bypasses the second roller and is also wound on the first roller;

when the first roller wheel rotates along the preset direction, the first roller wheel applies a pulling force which points to the near end along the far end to the sliding part through the pulling force, so that the sliding part is driven to move on the shell along the direction from the far end to the near end, and the outer tube is driven to move along the direction from the far end to the near end.

6. The delivery device of claim 5, wherein the second roller is located on a proximal side of the first roller, the other end of the pull wire passing around the second roller and being folded back and disposed around the first roller.

7. The transport device of claim 5, wherein the first roller is partially disposed inside the housing, and the second roller, the sliding portion, and the pull wire are all disposed inside the housing; the conveying device further comprises a guide mechanism, the guide mechanism is arranged in the shell and extends along the direction from the far end to the near end, and the sliding part is arranged on the guide mechanism and used for moving along the guide mechanism.

8. The delivery device of claim 7, wherein the housing further defines a guide slot extending distally to proximally, and wherein the drive portion further includes a first operating portion coupled to the slide portion, the first operating portion extending partially through the guide slot and to an exterior of the housing.

9. The delivery device of claim 7, wherein the handle further comprises a stress spreader tube connected to the distal end of the housing; the stress diffusion pipe is sleeved on the outer peripheral surface of the near end of the stabilizing pipe and keeps static relative to the stabilizing pipe; the conveying device further comprises a baffle and a guide rod, the baffle is arranged in the shell, and a sliding groove extending from the far end to the near end is formed in the baffle; the far end of the guide rod is connected with the stress diffusion tube, the near end of the guide rod is connected with the near end of the shell, and the guide rod and the sliding groove form the guide mechanism; the sliding part comprises a first connecting hole, the sliding part is sleeved on the guide rod through the first connecting hole, and the sliding part is also partially arranged in the sliding groove.

10. The delivery device of claim 9, wherein the baffle includes a baffle body and two ribs, each of the two ribs extending in a distal to proximal direction, the two ribs being spaced apart in a direction perpendicular to the guide rod, the space between the two ribs defining the chute.

11. The delivery device of claim 10, wherein the rib contacting the slider has a plurality of notches formed therein arranged sequentially in a distal to proximal direction.

12. The delivery device of any one of claims 1-4, wherein the handle comprises a housing and a stress diffusion tube connected to a distal end of the housing and disposed over a proximal outer circumferential surface of the stabilizer tube and held stationary relative to the stabilizer tube; the stress diffusion tube is provided with a second connecting hole which extends in an axial through manner and comprises a near-end hole section and a far-end hole section which are axially connected, the inner diameter of the near-end hole section is larger than that of the far-end hole section, and the inner wall of the near-end hole section is also provided with a first circumferential limiting part;

the stabilizing pipe comprises a stabilizing pipe body and a stabilizing pipe connecting piece arranged at the near end of the stabilizing pipe body, and a second circumferential limiting piece is arranged on the outer circumferential surface of the stabilizing pipe body; the proximal end of the stabilizing pipe body is inserted into the distal end hole section of the second connecting hole, the stabilizing pipe connecting piece is arranged in the proximal end hole section of the second connecting hole, and the second circumferential limiting piece is connected with the first circumferential limiting piece in a matched mode.

13. The transport device of claim 5, further comprising a one-way control mechanism for preventing rotation of the first roller in a direction opposite the predetermined direction.

14. The delivery device of claim 13, wherein the one-way control mechanism includes a check wheel and a pawl, the check wheel being disposed on and inside the housing and being stationary relative to the housing, the check wheel having a ratchet thereon; the pawl is connected to the first roller, and the pawl is configured to selectively engage with and disengage from the ratchet teeth, and when the pawl is engaged with the ratchet teeth, the pawl prevents the first roller from rotating in a direction opposite to the predetermined direction, and when the pawl is disengaged from the ratchet teeth, the pawl allows the first roller to rotate in the predetermined direction.

15. The conveying device according to claim 5, further comprising a stopper portion selectively connected to or disconnected from the sliding portion; when the limiting part is connected with the sliding part, the sliding part and the shell keep relatively static so as to prevent the driving part from driving the outer tube to move relative to the inner tube and the stabilizing tube, and when the sliding part is disconnected with the shell, the sliding part is allowed to slide on the shell so as to allow the driving part to drive the outer tube to move relative to the inner tube and the stabilizing tube.

16. The delivery device of claim 15, wherein the slide is disposed within the housing; be equipped with on the casing and dodge the groove, be equipped with first draw-in groove on the sliding part, spacing portion includes interconnect's second operation portion and fixture block, the second operation portion sets up the outside of casing, the fixture block is used for passing dodge the groove and insert first draw-in groove.

17. The conveying device according to claim 5, wherein a fourth connecting hole is formed in the sliding part, a third circumferential limiting part is arranged on the hole wall of the fourth connecting hole, and a second clamping groove is further formed in the outer wall of the sliding part;

the outer pipe comprises an outer pipe body and an outer pipe connecting piece arranged on the outer pipe body, the outer pipe connecting piece comprises a sleeve and a clamping jaw, a fourth circumferential limiting piece is arranged on the outer circumferential surface of the sleeve, and the clamping jaw is connected with the sleeve; the sleeve is inserted into the fourth connecting hole, the fourth circumferential limiting part is connected with the third circumferential limiting part in a matched mode, and one of the clamping jaws is inserted into one of the second clamping grooves.

18. A medical system comprising a medical implant and the delivery device of any one of claims 1-17; the medical implant is for loading between the inner tube and the outer tube.

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