CN110811946A

CN110811946A - Conveying device

Info

Publication number: CN110811946A
Application number: CN201810899886.6A
Authority: CN
Inventors: 王永胜; 吴世超; 李建民
Original assignee: Hangzhou Weiqiang Medical Technology Co Ltd
Current assignee: Hangzhou Endonom Medtech Co Ltd
Priority date: 2018-08-09
Filing date: 2018-08-09
Publication date: 2020-02-21

Abstract

The embodiment of the invention discloses a conveying device, which is used for conveying a main body bracket with a windowing structure, and comprises: a sheath-core assembly; the outer sheath tube is hollow and is sleeved outside the sheath core assembly, a conveying gap is formed between the outer sheath tube and the sheath core assembly, and the far end of the conveying gap is used for accommodating the contracted main body support; the embedded guide wire enters from the near end of the conveying gap and extends to the far end of the conveying gap, the far end of the embedded guide wire is used for entering the inner side of the main body support from the outer side of the main body support through the windowing structure, and the embedded guide wire is used for guiding the branch guide wire to penetrate out of the windowing structure of the main body support from the inner side. The invention has the advantage of reducing the difficulty of the branch guide wire passing through the main body bracket.

Description

Conveying device

Technical Field

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

Background

Abdominal Aortic Aneurysm (AAA) is a common aortic disease, and epidemiological studies have shown that AAA has a 5% incidence rate in men, but has an increased incidence rate of 10% in patients aged 80 years and older, and has a higher risk of rupture than in other people. It is predicted that by 2020, the population over 80 years will reach 3000 million and over 90 will exceed 1200 million in China, and more advanced AAA patients will need to be treated in the future.

The existing main modes for treating the abdominal aortic aneurysm comprise traditional open surgery and abdominal aortic aneurysm intraluminal repair, and the two modes have respective advantages. Since the first instance of abdominal aortic endoluminal repair (EVAR) was reported in the 90 s of the 20 th century to be used for the treatment of abdominal aortic aneurysms, it has rapidly progressed in as little as 20 years due to its advantages of small trauma, short operation and hospitalization time, fast postoperative recovery, low perioperative mortality and complication rate, and the like.

The abdominal aortic aneurysm intracavitary repair method has the greatest advantages that thoracotomy and abdominal opening are not needed, clamps are not needed to block blood vessels, no internal organ ischemia exists in the operation, and complications are few. The biggest limitation, however, is that visceral aorta cannot be covered, especially the superior mesenteric and renal arteries, and intraluminal repair of abdominal aortic aneurysms involving the renal artery field remains a difficult problem.

At present, the 'fenestrated stent type blood vessel' is adopted to carry out stent type blood vessel implantation treatment on patients of the kind, namely, a main stent is implanted in an abdominal aorta, a fenestration structure is arranged on the main stent, and a branch stent blood vessel is arranged on the fenestration structure and leads to the branch blood vessel. The stent type blood vessel implanted for carrying out the intracavity treatment on the abdominal aortic aneurysm relates to the reconstruction of four branch artery blood vessels of the abdominal trunk artery, the superior mesenteric artery and the left and right renal arteries.

In the prior art, after a main body stent is implanted into an arterial blood vessel, a branch stent needs to be implanted repeatedly, before the branch stent is implanted, a branch guide wire needs to be guided into the branch blood vessel through a windowing structure of the main body stent, and then the branch stent is guided by the branch guide wire to reach the branch blood vessel through the windowing structure of the main body stent, however, the branch guide wire is difficult to reach the branch blood vessel, because the branch guide wire needs to pass through the windowing structure of the main body stent to reach the branch blood vessel, the far end of the branch guide wire is difficult to align and pass through the windowing structure of the main body stent, and how to effectively reduce the difficulty of the branch guide wire reaching the branch blood vessel through the windowing structure is a problem which must be solved by medical staff and medical research and development.

Disclosure of Invention

The technical problem to be solved by the embodiments of the present invention is to provide a delivery device, which can reduce the difficulty of finding a branch vessel when a branch guide wire passes through a fenestration structure of a main body stent.

In order to solve the above technical problem, an embodiment of the present invention provides a conveying device for conveying a main body stent having a windowing structure, the conveying device including:

a sheath-core assembly;

the outer sheath tube is hollow and is sleeved outside the sheath core assembly, a conveying gap is formed between the outer sheath tube and the sheath core assembly, and the far end of the conveying gap is used for accommodating the contracted main body support;

the embedded guide wire enters from the near end of the conveying gap and extends to the far end of the conveying gap, the far end of the embedded guide wire is used for entering the inner side of the main body support from the outer side of the main body support through the windowing structure, and the embedded guide wire is used for guiding the branch guide wire to penetrate out of the windowing structure of the main body support from the inner side.

In an embodiment of the invention, a second locking component is arranged at the near side of the delivery device and used for locking the movement of the embedded guide wire.

In an embodiment of the present invention, the conveying device further includes:

a control handle connected with the proximal end of the outer sheath;

the tail end fixing piece is fixedly connected with the near end of the control handle;

the tail end slide piece is fixedly connected with the near end of the tail end fixing piece, the second locking assembly is arranged on the tail end slide piece, and the embedded guide wire penetrates out of the tail end slide piece and the tail end fixing piece to enter the conveying gap.

In one embodiment of the invention, the tail slide member comprises a hollow tail slide, the tail slide being in communication with the conveying gap; the second locking assembly comprises a wire fixing piece, a fixed convex ring fixed on the tail slide way and a separation blade fixed in the tail slide way, the embedded guide wire enters from a gap between the wire fixing piece and the separation blade, the wire fixing piece and the fixed convex ring are movably connected through threads, and when the fixing piece compresses the embedded guide wire on the convex ring, the motion of the embedded guide wire is locked.

In an embodiment of the present invention, the delivery device further includes a control handle, the control handle is connected to the outer sheath, and the control handle controls the outer sheath to move axially relative to the sheath core assembly so as to make the contracted main body stent in a partially released state or a completely released state.

In an embodiment of the invention, the delivery device further comprises a stent restraining assembly for enabling the main body stent of the release part not to be completely deployed to reduce the outer diameter when the main body stent is in the partial release state and enabling the main body stent to be completely deployed when the main body stent is in the complete release state.

In one embodiment of the invention, the stent restraining assembly includes at least one control wire entering from the proximal end of the delivery gap and extending to the distal end of the delivery gap for circumferentially restraining the main body stent of the delivery section.

In an embodiment of the present invention, the stent restraining assembly further includes a pull ring fixedly connected to the proximal end of the control wire, and the force is applied to the proximal end through the pull ring to release the restraint of the control wire on the main stent.

In an embodiment of the invention, the delivery device further comprises a first locking component, and the first locking component is used for locking the movement of the stent restraining component so as to prevent the control wire from releasing the restraint of the main stent by mistake.

In an embodiment of the present invention, the outer side of the outer sheath is fixedly connected with a sheath joint; the control handle includes:

the supporting main body is internally provided with the sheath pipe joint, and when an axial acting force is applied to the sheath pipe joint, the sheath pipe joint moves in the supporting main body along the axial direction to drive the outer sheath pipe to move axially;

a fixed handle installed at the outer side of the distal end of the support body and fixedly connected therewith;

the sliding handle is arranged on the outer side of the supporting main body, the sliding handle is arranged close to the near end of the fixed handle, and the sliding handle can rotate and drive the sheath pipe joint to move along the axial direction on the outer side of the supporting main body.

In an embodiment of the invention, the support body is provided with a long hole extending along the axial direction, the support body is sleeved with a body tooth block on the outer side, the sheath pipe joint comprises a joint body and a butting block, the joint body comprises a far-end convex block, the butting block and the far-end convex block respectively butt against the near end and the far end of the body tooth block to limit the body tooth block to move axially relative to the sheath pipe joint, the inner side of the sliding handle is provided with an internal thread, the outer side of the body tooth block is provided with an external thread, the internal thread is meshed with the external thread, and when the sliding handle rotates, the body tooth block, the butting block and the far-end convex block drive the sheath pipe joint to move axially so as to drive the outer sheath pipe to move axially.

In an embodiment of the invention, the sliding handle can slide on the supporting body along the axial direction, the fixed handle is embedded with the lock release button, the lock release button extends out of a clamping hook towards one side of the sliding handle, and the clamping hook hooks the sliding handle so that the sliding handle is arranged close to the fixed handle and prevents the sliding handle from sliding in the axial direction.

In one embodiment of the invention, the delivery device further comprises a push rod, a distal end of the push rod is positioned in the delivery gap, and the push rod is used for abutting against the main body support to prevent the main body support from moving to the proximal end of the delivery gap when the control handle controls the outer sheath tube to move to the proximal end along the axial direction relative to the sheath core assembly.

In an embodiment of the invention, the delivery device further comprises a support tube, a distal end of the support tube being located in the delivery gap, the push rod being located within the support tube.

In an embodiment of the invention, the push rod is provided with a plurality of through holes in the axial direction, and the embedded guide wire enters from the near end of the through hole and penetrates out from the far end of the through hole.

The embodiment of the invention has the following beneficial effects:

because the conveying device comprises the embedded guide wire, the embedded guide wire enters from the near end of the conveying gap and extends to the far end of the conveying gap, the far end of the embedded guide wire is used for entering the inner side of the main body support from the outer side of the main body support through the windowing structure, and the embedded guide wire is used for guiding the branch guide wire to penetrate out of the windowing structure of the main body support from the inner side. Therefore, the branch guide wire can easily penetrate through the windowing structure of the main body support under the guidance of the embedded guide wire, the branch guide wire is continuously pushed afterwards, the branch guide wire easily enters the branch blood vessel, and then the branch support easily reaches the branch blood vessel through the windowing structure of the main body support under the guidance of the branch guide wire, so that the branch support is conveyed conveniently.

Drawings

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

FIG. 1 is a perspective view of a delivery device according to one embodiment of the present invention;

FIG. 2 is a cross-sectional view in one direction of a delivery device according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a delivery device in another orientation in accordance with an embodiment of the present invention;

FIG. 4 is an enlarged view of the circled portion A of FIG. 2;

FIG. 5 is an enlarged view of the circled portion B of FIG. 2;

FIG. 6 is an enlarged view of the circled portion D of FIG. 3;

FIG. 7 is an enlarged view of the circled portion C of FIG. 2;

FIG. 8 is an enlarged view of the circled portion E of FIG. 3;

FIG. 9 is a schematic view of a delivery device according to an embodiment of the present invention at an angle (with the body support in a partially released state);

FIG. 10 is a schematic view of a delivery device according to an embodiment of the present invention at another angle (with the body support in a partially released state);

FIG. 11 is a schematic view of a body support according to an embodiment of the present invention in a fully released state;

FIG. 12 is a schematic view of a body stent in a partially released state in an arterial vessel in accordance with an embodiment of the present invention;

FIG. 13 is a schematic view of a branch guidewire reaching a branch vessel via a body stent in an arterial vessel according to an embodiment of the present invention;

FIG. 14 is a schematic view of a branch stent being guided over a branch guidewire out of a main stent in an arterial vessel to a branch vessel according to an embodiment of the present invention;

reference numbers of the drawings:

100-sheath core assembly; 110-inner sheath core; 120-sheath core tube; 130-a guide head; 131-a hollow channel; 140-a stent securing assembly; 142-a positioning sleeve; 143-anchor; 150-sheath-core tube fixing piece; 160-sheath core fixed steel sleeve; 170-releasing the screw cap; 200-sheath canal; 210-a transport gap; 220-sheath joint; 221-a butting block; 222-a connector body; 223-distal bumps; 300-a control handle; 310-a support body; 320-a fixed handle; 321-a lock release button; 322-hook; 323-button support; 324-locating posts; 330-sliding handle; 332-a rotating cover; 333-inward flanging; 334-a drag-reducing bulge loop; 340-a body dental block; 400-a stent tethering assembly; 410-control silk; 420-a pull ring; 500-a first locking assembly; 510-a tab fastener; 520-near release screw cap; 610-a push rod; 620-support tube; 630-a push rod mount; 640-tail end fixing piece; 650-tail end slide way piece; 670-luer fitting; 680-outer cover; 710-pre-buried guide wire; 720-a second locking assembly; 721-wire fixation; 722-a fixed convex ring; 723-baffle plate; 800-a body support; 810-tubular film covering; 811-windowing structure; 820-a ring support; 830-a connector; 840-bare stent; 900-branch stent; 910 — branch guide wire.

Detailed Description

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

The terms "comprising" and "having," and any variations thereof, as appearing in the specification, claims and drawings of this application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," and "third," etc. are used to distinguish between different objects and are not used to describe a particular order.

For clarity of description, the end of the delivery device proximal to the operator is proximal and the end relatively distal to the operator is distal; the end of the main body support close to the heart is a proximal end, the end far away from the heart is a distal end, and the delivery device and the main body support define the proximal end and the distal end through different references.

The embodiment of the invention provides a conveying device, which is used for conveying a main body support, wherein the main body support is loaded in the conveying device, the main body support is provided with a windowing structure, and the number of the windowing structures can be one or more. Referring to fig. 1-14, the delivery device includes a sheath core assembly, an outer sheath tube, and an embedded guide wire.

In the present embodiment, referring to fig. 1 to 4, the sheath core assembly 100 includes an inner sheath core 110 and an outer sheath core 120, the outer sheath core 120 is hollow and is sleeved on the inner sheath core 110, and the outer sheath core 120 is axially slidable relative to the inner sheath core 110.

In this embodiment, the delivery device further comprises a guide head 130 and a stent fixing component 140, wherein the guide head 130 is conical, the distal end of the guide head 130 is pointed, and the center of the guide head 130 forms a hollow channel 131 along the axial direction. The distal end of the inner sheath core 110 is fixedly connected to the proximal end of the introducer 130, and the inner sheath core 110 is hollow and communicates with the hollow channel 131 of the introducer 130. The stent fixing component 140 is arranged adjacent to the proximal end of the guide head 130, the stent fixing component 140 comprises a positioning sleeve 142 and a fixing anchor 143, the fixing anchor 143 is fixedly connected with the distal end of the outer sheath core tube 120, the fixing anchor 143 is in a columnar structure, and a circle of protrusions which are uniformly distributed at intervals are circumferentially arranged on the fixing anchor 143 for fixing a bare stent 840 (see fig. 11) at the proximal end of the main body stent 800, so that the proximal end of the main body stent 800 is positioned, that is, the proximal end of the main body stent 800 is sleeved on the fixing anchor 143; the distal end of the positioning sleeve 142 is fixedly connected with the guide head 130 in an injection molding manner, the positioning sleeve 142 is hollow, the positioning sleeve 142 extends to the fixing anchor 143 towards the proximal end and is partially sleeved on the fixing anchor 143, a limiting gap is formed between the fixing anchor 143 and the inner wall of the positioning sleeve 142, and the proximal part of the main body bracket 800 is located in the limiting gap.

In the present embodiment, the outer sheath tube 200 is hollow and sleeved outside the sheath core assembly 100, specifically, the outer sheath core tube 120, and the outer sheath tube 200 can move axially relative to the outer sheath core tube 120. A delivery gap 210 exists between the outer sheath 200 and the sheath core assembly 100, specifically, the delivery gap 210 is located between the outer sheath 200 and the outer sheath core tube 120, where the delivery gap 210 is a space between an inner wall of the outer sheath 200 and an outer wall of the outer sheath core tube 120, the fixing anchors 143 are all located in the delivery gap 210, proximal portions of the positioning sleeves 142 are located in the delivery gap 210, a distal end of the delivery gap 210 is used for accommodating the contracted main body stent 800, the main body stent 800 is reduced in volume by applying a forced external force to be accommodated in the delivery gap 210, a bare stent 840 at a proximal end of the main body stent 800 is positioned on a protrusion of the fixing anchor 143, and the main body stent 800 is located in the delivery gap 210 as a whole.

In this embodiment, referring to fig. 1, 2, 7, 12-14, the pre-embedded guide wire 710 enters from the proximal end of the delivery gap 210 and extends to the distal end of the delivery gap 210, at which time the main body stent 800 is not yet positioned on the protrusion of the anchor 143, and then the pre-embedded guide wire 710 continues to move forward, the distal end of the pre-embedded guide wire 710 enters from the outer side of the main body stent 800 to the inner side of the main body stent 800 through the fenestration 811, and then the distal end of the pre-embedded guide wire 710 is positioned at the inner side of the main body stent 800, and then the medical staff contracts and puts the main body stent 800 in the delivery gap 210, and then pulls back the partially loose pre-embedded guide wire 710, but the distal end of the pre-embedded guide wire 710 is not moved, and then the delivery device enters the arterial vessel of the patient, and after reaching the predetermined position, the delivery device releases a portion of the main body stent 800, and, of course, the body support may also be fully released in other embodiments of the invention. The fenestration 811 on the main body stent 800 is exposed, and the medical professional may adjust the position of the fenestration 811 or the like by moving it axially or circumferentially, for example, by placing the fenestration 811 against a branch vessel, although the medical professional may not adjust it. Then, the medical staff pushes the embedded guide wire 710 towards the far end, the embedded guide wire 710 moves forwards until the embedded guide wire 710 moves out of the other end of the blood vessel, then the medical staff pulls the branch guide wire 910 through the embedded guide wire 710 and pulls the embedded guide wire 710 towards the near end, the embedded guide wire 710 guides the branch guide wire 910 into the blood vessel and continues to guide the branch guide wire 910 to penetrate through the windowing structure 811 of the main body support 800 from the inner side of the main body support 800, at this time, the embedded guide wire 710 is separated from the branch guide wire 910, then the medical staff pushes the branch guide wire 910 at the other side, the branch guide wire 910 can continue to move forwards to the branch blood vessel, and then the branch support 900 can reach the branch blood vessel through the windowing structure 811 of the main body support 800 through the branch guide wire 910 and is communicated and connected with the main body support 800.

In this embodiment, the branch guide wire 910 can easily pass through the fenestration 811 of the main body stent 800 by the guidance of the pre-buried guide wire 710, and then the branch guide wire 910 is continuously pushed, so that the branch guide wire 910 can easily enter the branch blood vessel, and then the branch stent 900 can easily reach the branch blood vessel through the fenestration 811 of the main body stent 800 by the guidance of the branch guide wire 910, thereby facilitating the delivery of the branch stent 900.

In this embodiment, a second locking assembly 720 is provided proximal to the delivery device, and the second locking assembly 720 can be used to lock the movement of the pre-buried guide wire 710. In this embodiment, please refer to fig. 1 to 8, the conveying apparatus further includes a control handle 300, a tail end fixing member 640, and a tail end slide member 650, wherein the control handle 300 is connected to the proximal end of the sheath tube, the tail end fixing member 640 is fixedly connected to the proximal end of the control handle 300, the tail end slide member 650 is fixedly connected to the proximal end of the tail end fixing member 640, the tail end slide member 650 is provided with the second locking component, and the pre-buried guide wire penetrates through the tail end slide member 650 and the tail end fixing member 640 to enter the conveying gap.

Specifically, the tail slide 650 includes a hollow tail slide, the tail slide is communicated with the conveying gap 210, and the embedded guide wire 710 enters the tail slide; the second locking assembly 720 comprises a wire fixing piece 721, a fixing convex ring 722 fixed on the tail slideway and a blocking piece 723 fixed in the tail slideway, the embedded guide wire 710 enters from a gap between the blocking piece 723 and the wire fixing piece 721, the wire fixing piece 721 and the fixing convex ring 722 can be movably connected through threads, when the wire fixing piece 721 compresses the embedded guide wire 710 on the blocking piece 723, the movement of the embedded guide wire 710 is locked, and the situation that the embedded guide wire 710 is drawn to an improper position due to error is prevented.

In the present embodiment, referring to fig. 1, fig. 2, fig. 5, and fig. 6, a control handle 300 is connected to the outer sheath tube 200, the control handle 300 is used for controlling the outer sheath tube 200 to move axially relative to the sheath core assembly 100, specifically, for controlling the outer sheath tube 200 to move axially relative to the outer sheath core tube 120, and the left and right directions in the schematic diagram of fig. 1 are axial directions. Therefore, the control handle 300 controls the sheath 200 to move axially, so that the main body stent 800, which is contracted and located in the delivery gap 210, is in a partially released state or a completely released state, where the partially released state means that the proximal portion of the main body stent 800 is released, the main body stent 800 of the released portion is no longer limited by the sheath 200, and is used for adjusting the position of the main body stent 800, please refer to fig. 9 and 10, and the completely released state means that the sheath 200 does not limit the entire main body stent 800, that is, the sheath 200 does not exist outside the main body stent 800, please refer to fig. 11. In this embodiment, the main body support 800 is released step by step, specifically: firstly, releasing part of the main body support 800, wherein the main body support 800 of the released part is exposed (please refer to fig. 9 and 10), wherein the main body support 800 of the released part is positioned at the proximal end side of the main body support 800, the rest part of the main body support 800 is still in the conveying device, the main body support 800 is in a partial release state, then, carrying out position adjustment on the main body support 800, when the main body support 800 is adjusted to the position, then releasing the rest part of the main body support 800, wherein the main body support 800 is completely released, and the main body support 800 is in a complete release state. In addition, in other embodiments of the present invention, the number of times the main body stent is released in steps is not limited to two times, but may be more. In this embodiment, the windowing structure 811 is located on the main body support of the release portion when the main body support 800 is in the partially released state.

In order to adjust the axial position of the external sheath 200, please refer to fig. 1, fig. 2, fig. 5, and fig. 6, in this embodiment, the external sheath 200 is fixedly connected to the sheath connector 220, in this embodiment, the outer side of the proximal end of the external sheath 200 is fixedly connected to the sheath connector 220, and when the sheath connector 220 moves along the axial direction, the sheath connector 220 drives the external sheath 200 to move along the axial direction. The control handle 300 comprises a supporting body 310, a fixed handle 320 and a sliding handle 330, the supporting body 310 is hollow and is provided with the sheath joint 220, when an axial acting force is applied to the sheath joint 220, the sheath joint 220 moves axially in the supporting body 310 to drive the external sheath 200 to move axially, the fixed handle 320 is installed at the outer side of the distal end of the supporting body 310 and is fixedly connected with the fixed handle, the sliding handle 330 is installed at the outer side of the supporting body 310, the sliding handle 330 is arranged adjacent to the proximal end of the fixed handle 320, the sliding handle 330 is rotatable and drives the sheath joint 220 to move axially outside the supporting body 310, that is, the rotation of the sliding handle 330 is converted into the axial movement of the sheath joint 220.

Specifically, the support main body 310 is provided with a long hole (not shown in the figure) extending along the axial direction, the outer side of the support main body 310 is sleeved with a main body tooth block 340, the sheath tube joint 220 comprises a joint main body 222 and an abutting block 221, the joint main body 222 comprises a far-end projection 223, the joint main body 222 is provided with a hole, the abutting block 221 is partially located in the hole, the abutting block 221 and the far-end projection 223 abut against the near end and the far end of the main body tooth block respectively so as to limit the main body tooth block 340 to move axially relative to the sheath tube joint 220, that is, the main body tooth block 340 is axially located between the abutting block 221 and the far-end projection 223, the inner side of the sliding handle 330 is provided with an internal thread, the outer side of the main body tooth block 340 is provided with an external thread engaged with the external thread, when the sliding handle 330 rotates, the main body tooth block 340, the abutting block 221 and the, thereby driving the sheath 200 to move axially, so that the main body bracket 800 can be in a partially released state or a completely released state.

In this embodiment, the sliding handle 330 can also slide on the supporting body 310 in an axial direction, that is, the sliding handle 330 can slide in the axial direction relative to the fixed handle 320, in order to maintain the axial position of the sliding handle 330, in this embodiment, a release button 321 is embedded in the fixed handle 320, a hook 322 extends from the release button 321 to one side of the sliding handle 330, a button support 323 is arranged below the release button 321, the button support 323 is fixed on the supporting body 310, positioning posts 324 are respectively arranged between the release button 321 and the button support 323 in opposite positions, and driving springs are sleeved on the two positioning posts 324 and located between the release button 321 and the button support 323 to drive the hook 322 to be in position. The hook 322 hooks the sliding handle 330 such that the sliding handle 330 is disposed adjacent to the fixed handle 320 and prevents the sliding handle 330 from sliding in the axial direction. Specifically, the sliding handle 330 includes a rotating cover 332, the rotating cover 332 is disposed at a distal end of the sliding handle 330, the rotating cover 332 has an inner flange 333, the hook 322 can extend into and be engaged with the inner flange 333, and one side of the inner flange 333 engaged with the hook 322 can be regarded as an annular positioning groove, that is, the hook 322 is located in the positioning groove, so as to limit an axial position of the hook 322 and allow the sliding handle 330 to rotate relative to the fixed handle 320. In this embodiment, two concentrically arranged drag reduction protruding rings 334 are disposed on the rotating cap 332, the drag reduction protruding ring 334 is disposed on the distal side wall of the rotating cap 332, and the fixed handle 320 and the sliding handle 330 are changed from surface contact to line contact through the drag reduction protruding ring 334, so that the contact area between the two is greatly reduced, the resistance of the two during relative movement is reduced, and the release process is more stable and accurate.

In order to prevent the main stent 800 from being completely expanded when the main stent 800 is in a partially released state, the main stent 800 in the released portion is tightly attached to the blood vessel (the diameter of the main stent after being completely released is generally larger than about 10% of the diameter of the blood vessel), and the main stent 800 is released inaccurately and the position of the main stent 800 cannot be readjusted. In this embodiment, referring to fig. 1-3 and 8, the delivery device includes a stent restraining assembly 400, the stent restraining assembly 400 is used for making the main stent 800 of the release part not fully expanded to reduce the outer diameter of the main stent 800 of the release part when the main stent 800 is in a partially released state, where the main stent 800 of the release part refers to the part of the main stent 800 that is not restrained by the sheath 200, i.e. the exposed part of the main stent 800, and the ratio of the outer diameter of the main stent 800 of the release part when not expanded to the outer diameter of the main stent 800 of the release part when fully expanded is less than or equal to 90%, so that, since the main stent 800 of the release part is not fully expanded and has a small outer diameter, the part of the main stent 800 does not abut against the blood vessel, so that when the position of the main stent 800 when released is not accurate, for example, when the circumferential alignment of the main stent 800 is not accurate, for example, the position of the windowing structure 811 (see fig. 10) on the main body stent 800 is inaccurate, and at this time, there is no resistance when the released portion of the main body stent 800 is tightly attached to the blood vessel when fully deployed, the delivery device can easily drive the main body stent 800 to move, for example, rotate or axially move, so as to conveniently adjust the position of the main body stent 800, for example, adjust the circumferential alignment of the main body stent 800, and after the main body stent 800 is adjusted to be in place, the control handle 300 can operate the sheath tube 200 to move axially toward the proximal end, so as to fully release the main body stent 800, and at this time, the main body stent 800 is fully deployed, and the main body stent 800 is. Therefore, the main body bracket 800 can be conveniently adjusted by the conveying device in the embodiment, and the time and the energy of an operator can be saved. In this embodiment, the stent restraining device may fully deploy the main stent 800 at the release portion after the main stent 800 is adjusted in position, or may fully deploy the main stent 800 when the main stent 800 is in a fully released state. In another embodiment of the present invention, the operator may adjust the position of the main body frame by operating the transport device even when the axial position of the main body frame is inaccurate.

With continued reference to fig. 1-3 and 8, in this embodiment, the stent restraint assembly 400 includes at least one control wire 410, where the number of control wires 410 may be one, two or more, the material of the control wire 410 may be selected from stainless steel wires, and the control wire 410 enters from the proximal end of the delivery gap 210 and extends to the distal end of the delivery gap 210. Referring to fig. 11, the stent graft 800 includes a tubular stent graft 810 and an annular support frame 820, the tubular stent graft 810 is axially provided with a connector 830 from a proximal end to a distal end, the connector 830 is circumferentially spaced in at least two rows, preferably, the proximal end of the connector 830 is located at the proximal end of the tubular stent graft 810, the distal end of the connector 830 is located at the middle of the tubular stent graft 810, the tubular stent graft 810 is provided with at least one windowing structure 811, the windowing structure 811 is located between the proximal end and the middle of the tubular stent graft 810, when the stent graft 800 is in a partially released state, the stent graft starts to be released from the proximal end to the distal end, but generally does not exceed the middle of the stent graft, and the windowing structure 811 is located on the released portion of the stent graft 800. The control wire 410 constrains at least two rows of the connectors 830 together such that the stent graft 800 is not fully circumferentially deployed, thereby reducing the outer diameter of the released portion of the stent graft 800, particularly the outer diameter of the released portion of the stent graft 800 is less than the diameter of the vessel, thereby facilitating adjustment of the position of the stent graft 800, such as adjustment of the fenestration 811 against the branch vessel. Preferably, the circumferential length of the control wire 410 between the two rows of connectors 830 can be reduced by more than 10% of the outer diameter of the stent graft 800of the release portion, i.e., the ratio of the outer diameter of the stent graft 800 of the release portion when it is not deployed to the outer diameter of the stent graft 800 of the release portion when it is fully deployed is less than or equal to 90%.

In this embodiment, the stent restraining assembly 400 further includes a pulling ring 420, the pulling ring 420 is fixedly connected to the proximal end of the control wire 410, so as to facilitate the operation of the control wire 410 during the operation, and the specific staff can release the restraint of the control wire 410 on the stent graft 800 by applying a force to the proximal end through the pulling ring 420, thereby completing the release of the restrained portion of the stent graft 800.

To increase the safety of the instrument in use, in this embodiment, the delivery device further includes a first locking assembly 500, the first locking assembly 500 for locking the movement of the stent restraining assembly 400 to prevent inadvertent release of the restraining of the stent graft 800 by the control wire 410. In this embodiment, the first locking assembly 500 is used to lock the movement of the pull ring 420 to prevent inadvertent release of the binding of the control wire 410 to the stent graft 800, and in other embodiments of the invention, the first locking assembly may also be used to lock the movement of the control wire to prevent inadvertent release of the binding of the control wire to the stent graft. In this embodiment, the first locking assembly 500 comprises a tab fastener 510, a proximal release screw cap 520, the tab fastener 510 is screwed to a proximal end of a tail end slide member 650 (described later), the tab fastener 510 is provided with a through hole for positioning the tab 420, a first groove for cooperating with the proximal release screw cap 520, the proximal release screw cap 520 is rotatably mounted to a distal end of the tab fastener 510, an L-shaped protrusion is provided at an inner distal end of the proximal release screw cap 520, a long arm of the L-shaped protrusion extends in a circumferential direction, a short arm of the L-shaped protrusion extends from one end of the long arm in an axial direction toward a distal end, the L-shaped protrusion defines a second groove, the distal end of the tab 420 is provided with a second protrusion extending outward, and after the tab 420 is inserted into the through hole for fixation, the proximal release screw cap 520 is rotated to enter the second groove, thereby locking the tab 420 in this position, at this time, the pull ring 420 cannot drive the control wire 410 to move towards the proximal direction, so that the constraint on the stent graft 800 is prevented from being released due to errors, and when the proximal release screw cap 520 is rotated to enable the second protrusion to come out of the second groove, the pull ring 420 can be operated to drive the control wire 410 to move towards the proximal direction, so that the constraint on the stent graft 800 can be released.

In this embodiment, referring to fig. 1-3 and 7, the delivery device further includes a push rod 610 and a support tube 620, the support tube 620 is located between the sheath 200 and the sheath core tube 120, that is, the support tube 620 is at least partially located in the delivery gap 210, and the support tube 620 plays a role of increasing support; the push rod 610 is located between the support tube 620 and the outer sheath core tube 120, the distal end of the push rod 610 is located in the delivery gap 210, the distal end of the push rod 610 is used for abutting against the main body support 800 to prevent the main body support 800 from moving towards the proximal end of the delivery gap 210 when the control handle 300 controls the outer sheath tube 200 to move axially and proximally relative to the sheath core assembly 100, and the push rod 610 also plays a role of support. In addition, in the present embodiment, the push rod 610 is provided with a plurality of through holes in the axial direction, and the through holes can be used for controlling the passing of the wire 410 and the embedded guide wire 710.

In this embodiment, the conveying device further includes a push rod fixing member 630 and a tail end fixing member 640, the push rod fixing member 630 is fixedly connected to the push rod 610 and the proximal end of the support tube 620, the distal end of the push rod fixing member 630 is located inside the proximal end of the support body 310, and the distal end of the push rod fixing member 630 is fixedly connected to the proximal end of the support body 310; the tail end fixing member 640 is sleeved outside the proximal end of the support main body 310, and the distal end of the tail end fixing member 640 is fixedly connected with the proximal end of the support main body 310. In addition, the push rod fixing member 630 extends to form a port, and the port is connected to one end of the TPU hose, and the other end of the TPU hose is connected to a three-way valve.

In this embodiment, the proximal end of the tail end fixing member 640 is fixedly connected to the tail end sliding member 650, the distal end of the tail end sliding member 650 is located inside the tail end fixing member 640, the sheath/core tube fixing member 150 is disposed inside the tail end sliding member 650, the sheath/core tube fixing member 150 is located at an approximately middle position of the tail end sliding member 650, and the sheath/core tube fixing member 150 is fixedly connected to the outer side of the proximal end of the outer sheath/core tube 120. An outer cover 680 is disposed near the proximal end of the trailing slide piece 650, and the outer cover 680 is sleeved on the trailing slide piece 650.

In this embodiment, referring to fig. 1-3, 7 and 8, a sheath-core fixing steel sleeve 160 and a rear release screw cap 170 are disposed at one side of the proximal end of the rear end slide member 650, the sheath-core fixing steel sleeve 160 is located inside the rear end slide member 650, and the sheath-core fixing steel sleeve 160 is fixedly connected to the inner sheath core 110 and located outside the inner sheath core 110; the rear release screw cap 170 is located outside one side of the proximal end of the tail end slide way piece 650, the rear release screw cap 170 is fixedly connected with the sheath core fixing steel sleeve 160, one side of the proximal end of the tail end slide way piece 650 is provided with an axially extending long hole, and the rear release screw cap 170 can drive the sheath core fixing steel sleeve 160 to move axially within the range of the long hole, so that the rear release of the main body bracket 800 is controlled. In this embodiment, the proximal end of the tail chute member 650 is fixedly attached to the distal end of the tab fastener 510. In this embodiment, the proximal end of the inner sheath core 110 is fixedly connected to the luer 670.

In addition, in this embodiment, referring to fig. 11, the main body stent 800 includes a tubular covering film 810 and an annular supporting frame 820, the tubular covering film 810 is axially provided with connecting pieces 830 from a proximal end to a distal end, and the connecting pieces 830 are circumferentially arranged in at least two rows at intervals. When the main body stent 800 is in a partial release state, the stent restraining assembly 400 controls at least two rows of the connectors 830 to be restrained together so that the main body stent 800 is not completely unfolded in the circumferential direction, and when the main body stent 800 is in a complete release state, the stent restraining assembly 400 releases the restraint of the connectors 830 so that the covered stent 800 is completely unfolded.

The tubular covering film 810 is provided with a windowing structure 811, and the windowing structure 811 is positioned on the tubular covering film of the release part when the main body stent 800 is in a partial release state. The specific structure of the main body holder 800 of the present embodiment is described in detail in CN201711483955.7 of the applicant's prior application, and the disclosure of the document is incorporated herein by reference.

It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.

Claims

1. The utility model provides a conveyor for carry the main part support that contains the structure of windowing, its characterized in that, conveyor includes:

a sheath-core assembly;

the embedded guide wire enters from the near end of the conveying gap and extends to the far end of the conveying gap, the far end of the embedded guide wire is used for entering the inner side of the main body support from the outer side of the main body support through the windowing structure, and the embedded guide wire is used for guiding the branch guide wire to penetrate out of the inner side and be positioned to the windowing structure of the main body support.

2. The delivery device of claim 1, wherein a second locking assembly is provided proximal to the delivery device for locking the movement of the pre-buried guidewire.

3. The delivery device of claim 2, further comprising:

a control handle connected with the proximal end of the outer sheath;

4. The transport apparatus of claim 3, wherein the trailing slide member includes a hollow trailing slide in communication with the transport gap; the second locking assembly comprises a wire fixing piece, a fixed convex ring fixed on the tail slide way and a separation blade fixed in the tail slide way, the embedded guide wire enters from a gap between the wire fixing piece and the separation blade, the wire fixing piece and the fixed convex ring are movably connected through threads, and when the fixing piece compresses the embedded guide wire on the convex ring, the motion of the embedded guide wire is locked.

5. The delivery device of claim 1, further comprising a control handle coupled to the outer sheath, the control handle controlling axial movement of the outer sheath relative to the sheath assembly to cause the collapsed main body scaffold to assume either the partially released state or the fully released state.

6. The delivery device of claim 5, further comprising a stent restraint assembly for incompletely deploying the released portion of the main body scaffold to reduce the outer diameter when the main body scaffold is in the partially released state and completely deploying the main body scaffold when the main body scaffold is in the completely released state.

7. The delivery device of claim 6, wherein the stent restraining assembly comprises at least one control wire entering from a proximal end of the delivery gap and extending to a distal end of the delivery gap, the distal end of the control wire being adapted to circumferentially restrain the main body stent of the delivery section.

8. The delivery device of claim 7, wherein the stent restraint assembly further comprises a pull ring fixedly connected to the proximal end of the control wire, wherein the proximal force is applied by the pull ring to release the restraint of the control wire to the main body stent.

9. The delivery device of claim 6, further comprising a first locking assembly for locking movement of the stent restraining assembly to prevent inadvertent release of the restraining of the main stent by the control wire.

10. The delivery device of claim 5, wherein a sheath adapter is fixedly attached to the outside of said outer sheath; the control handle includes:

11. The conveying device as claimed in claim 10, wherein the supporting body is provided with a long hole extending along an axial direction, the supporting body is sleeved with a body tooth block on an outer side, the sheath joint comprises a joint body and a butt block, the joint body comprises a distal end protrusion, the butt block and the distal end protrusion respectively butt against a proximal end and a distal end of the body tooth block for limiting the body tooth block to move axially relative to the sheath joint, the sliding handle is provided with an inner thread on an inner side, the body tooth block is provided with an outer thread on an outer side, the inner thread is engaged with the outer thread, and when the sliding handle rotates, the sheath joint is driven to move along the axial direction by the body tooth block, the butt block and the distal end protrusion, so as to drive the outer sheath to move axially.

12. The transport apparatus as claimed in claim 10, wherein the sliding handle is axially slidable on the support body, and the fixed handle is fitted with a release button extending to one side of the sliding handle and a hook hooking the sliding handle to allow the sliding handle to be disposed adjacent to the fixed handle and to prevent the sliding handle from sliding in the axial direction.

13. The delivery device of claim 5, further comprising a pusher rod having a distal end positioned in the delivery gap, the pusher rod being configured to abut the body support to prevent proximal movement of the body support toward the delivery gap when the control handle controls axial proximal movement of the sheath relative to the sheath assembly.

14. The delivery device of claim 13, further comprising a support tube, a distal end of the support tube being positioned in the delivery gap, the push rod being positioned within the support tube.

15. The delivery device of claim 13, wherein the push rod is axially provided with a plurality of through holes, and the pre-embedded guide wire enters from the proximal end of the through holes and passes out from the distal end of the through holes.