CN112472382A - Vascular stent pushing and releasing device - Google Patents

Abstract

The invention discloses a vascular stent pushing and releasing device, which comprises a pushing pipe assembly, a main stent releasing assembly and two or three branch stent bundle diameter guide wires, wherein the pushing pipe assembly comprises an outer sleeve, an inner pipe and a core pipe, the main stent releasing assembly comprises a main stent bundle diameter guide wire and a main stent front fixing part, the main stent bundle diameter guide wire is arranged in the outer sleeve in a penetrating way, the main stent front fixing part is arranged at the front end of the inner pipe, the main stent front fixing part comprises a base, a plurality of hanging claws are arranged on the upper surface of the base along the circumferential direction, a guide sleeve on the branch stent bundle diameter guide wire of the vascular stent pushing and releasing device can guide a branch stent on the vascular stent into a branch blood vessel above an aortic arch, so that the vascular stent with the branch stent can be smoothly arranged at the aortic arch, when the vascular stent is pushed to the aortic arch, the main stent bundle diameter guide wire is pulled, the main stent can be released and expanded quickly, so that the aortic arch is prevented from being blocked to form thrombus, and the operation process is safer.

Description

Vascular stent pushing and releasing device

Technical Field

The invention relates to the technical field of interventional medical instruments, in particular to a pushing and releasing device for a vascular stent.

Background

Thoracic aortic dissection or thoracic aortic aneurysm are the most common aortic disease with higher mortality, surgery-related mortality, and incidence of surgical complications. Surgical operations and thoracic aortic endoluminal repair are common treatment modalities for thoracic aortic disease; the thoracic aorta endoluminal repair is a minimally invasive operation mode for treating thoracic aorta diseases by adopting related interventional therapy technology, the operation mode is that a vascular stent is pushed to a vascular lesion position through a pusher, and the vascular stent is supported to the inner wall of a blood vessel at the lesion position to play a role in blocking the lesion. This mode of surgery has become the primary mode of surgery for the treatment of thoracic aortic disease.

Three important branch arteries supply blood to the brain and two upper limbs above the aortic arch, the three branch blood vessels are a left subclavian artery, a left common carotid artery and a left subclavian artery respectively, and when an aortic dissection or aortic aneurysm is accumulated to an ascending aorta or an aortic arch part, a branch stent technology is required to be adopted in order to protect the three important branch arteries on the aortic arch. The branch stent consists of a main stent and a branch stent, and can keep the opening of a branch artery on an aortic arch while plugging the lesion laceration of the aorta; the branch support comprises a modular branch support and an integrated branch support. Compared with the modular branch support, the integrated branch support has firm structure and better long-term curative effect; however, the release process of the existing integrated branch stent is relatively complex, so that the incidence rate of complications is high; the main reason is that the structure of the existing integrated branch stent pusher is unreasonable and needs to be improved so as to further simplify the release process of the integrated branch stent.

Disclosure of Invention

The invention aims to provide a vascular stent pushing and releasing device, which solves the technical problem that operation steps are too complicated in the process of placing an integrated branch vascular stent to an aortic arch, so that the incidence rate of operation-related complications is high in the prior art.

In order to solve the technical problems, the invention adopts the following technical scheme:

the utility model provides a vascular support propelling movement release, includes the propelling movement pipe assembly, and this propelling movement pipe assembly includes outer tube, inner tube and core pipe, still includes:

the main support releasing assembly comprises a main support bundle diameter guide wire which is arranged in the outer sleeve in a penetrating mode, and a main support front fixing part which is arranged at the front end of the inner tube, wherein the main support front fixing part comprises a base, and a plurality of hanging claws which extend forwards are arranged on the upper surface of the base along the circumferential direction;

the two or three sub-frame beam diameter guide wires are used for being arranged in the outer sleeve in a penetrating mode, each sub-frame beam diameter guide wire comprises a bridging guide wire section and a safety guide wire section, and a sub-frame beam diameter guide sleeve located between the bridging guide wire section and the safety guide wire section is arranged on each sub-frame beam diameter guide wire.

Preferably, the sub-frame diameter-restraining guide wire is a whole guide wire, a positioning block is arranged on the sub-frame diameter-restraining guide wire, the bridge guide wire section and the safety guide wire section are respectively arranged at the front part and the rear part of the positioning block of the sub-frame diameter-restraining guide wire, the sub-frame diameter-restraining guide sleeve penetrates through the sub-frame diameter-restraining guide wire, and one end of the sub-frame diameter-restraining guide wire is fixed on the positioning block.

Preferably, the bridging guide wire section and the safety guide wire section of the sub-stent bundle diameter guide wire are two separate guide wires, and the bridging guide wire section and the safety guide wire section are respectively connected to the sub-stent bundle diameter guide sleeve.

Preferably, the outer sleeve comprises a first sleeve and a second sleeve, the front end of the first sleeve is preformed into an arc shape, the rear end of the first sleeve is provided with a first connecting assembly, the second sleeve is arranged in the first connecting assembly and the first sleeve in a penetrating manner, the first connecting assembly comprises a first connecting sleeve, an injection sleeve and a first sealing and locking mechanism which are sequentially connected from front to back, the injection sleeve is communicated with the injection tube, and the first sealing and locking mechanism is used for sealing a gap between the first sleeve and the second sleeve and locking the second sleeve; the second sleeve pipe rear end is equipped with second coupling assembling, second coupling assembling is including the second connecting sleeve and the sealed locking mechanism of second that connect gradually from beginning to end, the sealed locking mechanism of second is used for sealing the clearance and the locking of second sleeve pipe and inner tube the inner tube.

Preferably, the first sealing and locking mechanism comprises a first shell connected to the rear end of the injection sleeve, a flexible sealing sleeve sleeved on the second sleeve is arranged in the first shell, a first inner flange pressing the periphery of the flexible sealing sleeve is arranged at the upper part in the first shell, a second inner flange is arranged at the lower part in the first shell, an outer flange located below the second inner flange is arranged at the bottom of the flexible sealing sleeve, and a bottom cover pressing the outer flange is arranged at the bottom of the first shell.

Preferably, the second sealing and locking mechanism comprises a sealing gasket and a second shell which are sleeved on the inner pipe, the sealing gasket is arranged between the second connecting sleeve and the second shell in a pressing mode, a first opening locking sleeve, a first pressing ring and a first pressing cap are sequentially sleeved at the rear end of the inner pipe, a first lower cavity is arranged at the lower portion of the second shell, and the first pressing cap is in threaded connection with the first lower cavity.

Preferably, the rear end of the second sleeve is a bell mouth, a compression column for compressing the bell mouth is arranged in the second connecting sleeve, a first upper cavity is arranged at the upper part in the second shell, and the sealing gasket is arranged at the bottom of the first upper cavity in a pressing mode through the compression column.

Preferably, a side hole for passing each guide wire is arranged on the side surface of the first lower cavity of the inner lower part of the second shell.

Preferably, the rear ends of the branch frame bundle diameter guide wires are provided with locking mechanisms, each locking mechanism comprises a second opening locking sleeve, a fixed valve pressing cap and a fixed valve locking shell, a through hole and a fixed valve lower cavity are arranged in each fixed valve locking shell, the top of the fixed valve lower cavity is provided with a conical part which is abutted against the second opening locking sleeve, and the fixed valve pressing cap is in threaded connection with the fixed valve lower cavity.

Preferably, the front end of the core tube is provided with a conical pushing head, the rear end of the core tube is provided with an injection joint, the side face of the conical pushing head is provided with an insertion hole, a through hole is formed in the conical pushing head, guide wires can pass through the through holes of the core tube and the conical pushing head, and the main support diameter guide wire and the sub-support diameter guide wire are both steel wires.

The invention has the main beneficial technical effects that:

1. the front end of the first sleeve is preformed into an arc shape, so that the branch frame part and the opening of the branch artery on the aortic arch can be conveniently aligned in the operation process.

2. The vascular stent pushing device provided by the invention is provided with two or three branch stent bundle diameter guide wires which are arranged in the outer sleeve in a penetrating way; the bridging guide wires arranged on the branch support diameter guide wires are exposed out of the front end of the first sleeve, and a passage for guiding the branch supports to branch blood vessels above the aortic arch can be established before the blood vessel support pushing device enters the aortic lumen, so that the blood vessel support with two or three branch supports can be smoothly placed at the aortic arch, and the time and steps for operating the blood vessel support pushing device in the aortic lumen are reduced.

3. Because the bridging guide wire section and the safety guide wire section of the branch frame beam diameter guide wire are the front part and the rear part of the whole guide wire, the branch frame beam diameter guide sleeve is fixed on the positioning block between the bridging guide wire section and the safety guide wire section; the branch frame can be guided into a branch blood vessel above an aortic arch by pulling the bridging guide wire section, the tail end of the arranged safety guide wire is fixed outside the second shell, and the safety guide wire section can prevent the branch frame from accidentally separating from the branch frame bundle diameter guide sleeve in the process of pulling the bridging guide wire section, so that the safety of the operation is improved.

4. The branch frame beam diameter guide sleeve of the branch frame beam diameter guide wire can enable the branch frame part to be in a compressed state; in the process of placing the stent, the blood flow of the branch blood vessel is prevented from being blocked, and the risk of embolism of a distal organ caused by thrombus formation is reduced.

5. The main support diameter-binding guide wire of the main support release assembly can enable the main support part to be in a tightly compressed state in cooperation with the diameter-binding rope sleeve of the branch support; during stent placement, it prevents the aorta from being blocked from blood flow and less thrombosed leading to risk of distal organ embolism.

6. The main bracket front fixing component arranged at the front end of the inner tube can enable the naked bracket area at the front end of the intravascular bracket to be anchored on the main bracket front fixing component; after the blood vessel stent is pushed to the aortic arch, the blood vessel stent can prevent the proximal displacement of the main body part of the stent caused by the process of withdrawing the first sleeve; during the process of releasing the main body support, the positioning accuracy of the proximal end of the main body support can be improved.

7. The first pressing cap at the tail end of the blood vessel support pushing device can prevent the near end of the support main body part from being accidentally opened due to the fact that the front fixing component of the main support at the front end of the inner tube accidentally slips backwards, and therefore the accurate positioning of the near end of the support main body part is influenced.

8. Parts such as the compaction post in the second coupling assembling, seal gasket can be unpack apart to it smoothly penetrates to be convenient to lead wire before the art.

Drawings

Fig. 1 is a sectional view of an embodiment of a stent pushing and releasing device according to the present invention.

Fig. 2 is an enlarged view of a portion a of fig. 1.

Fig. 3 is an enlarged view of a portion B of fig. 1.

Fig. 4 is an enlarged view of a portion C of fig. 1.

Fig. 5 is an enlarged view of a portion D of fig. 1.

Fig. 6 is a schematic structural view of a vascular stent.

Fig. 7 is a schematic structural view illustrating binding of a main stent of the stent in fig. 6.

Fig. 8 is an enlarged view of a portion E of fig. 7.

Fig. 9 is a schematic view of the stent of fig. 6 after being delivered into an aortic arch.

Fig. 10 is a structural schematic diagram of another vascular stent.

Fig. 11 is a schematic front end structure view of another embodiment of the stent pushing and releasing device of the present invention.

In the above figures, the reference numerals are to indicate: the first sleeve 11, the second sleeve 12, the flare 121, the inner tube 13, the main stent front fixing component 131, the hanging claw 1311, the core tube 14, the injection joint 141, the taper pushing head 15, the insertion hole 151, the guide wire 21, the main stent bundle diameter guide wire 22, the branch stent bundle diameter guide wire 23, the bridging guide wire segment 231, the safety guide wire segment 232, the branch stent bundle diameter guide sleeve 233, the positioning block 234, the second opening locking sleeve 235, the fixing valve pressing cap 236, the fixing valve locking shell 237, the fixing valve lower cavity 2371, the taper portion 2372, the first connection component 3, the first connection sleeve 31, the injection sleeve 32, the first seal locking mechanism 33, the sleeve portion 331, the second inner flange 3311, the top cover 332, the first inner flange 3321, the bottom cover connection component 333, the flexible sealing sleeve 334, the outer flange 3341, the second connection sleeve 4, the second connection sleeve 41, the pressing column 411, the second seal locking mechanism 42, the sealing gasket 421, the second shell 422, The first upper cavity 4221, the first lower cavity 4222, the side hole 4223, the first compression ring 424, the first compression cap 425, the main stent 51, the first diameter-tied rope loop 511, the front end 5111 of the first diameter-tied rope loop, the second diameter-tied rope loop 512, the front end 5121 of the second diameter-tied rope loop, the first sub-stent 52, the second sub-stent 53, the third sub-stent 54, the heart 6, the aortic arch 61, the brachiocephalic trunk artery 62, the left common carotid artery 63, the left subclavian artery 64, the descending aorta 65 and the artificial diversion vessel 66.

Detailed Description

The following examples are intended to illustrate the present invention in detail and should not be construed as limiting the scope of the present invention in any way.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. References to "first," "second," etc. in this application are intended to distinguish between similar items and not necessarily to describe a particular order or sequence.

Example 1: a stent pushing and releasing device, the structure of which is shown in fig. 1 to 5.

As shown in fig. 1, the pushing and releasing device for the blood vessel stent comprises a pushing tube assembly, the pushing tube assembly comprises an outer sleeve composed of a first sleeve 11 and a second sleeve 12, an inner tube 13 and a core tube 14, the first sleeve 11, the second sleeve 12, the inner tube 13 and the core tube 14 are sequentially sleeved from outside to inside and are all flexible, the whole pushing tube assembly can be pushed in an aorta lumen along a guide wire, and a handle 132 is arranged at the rear end of the inner tube 13 to facilitate holding, pushing, withdrawing and other operation actions.

As shown in fig. 2, the inner tube 13 and the core tube 14 are thin, the core tube 14 is sleeved in the inner tube 13 and can move back and forth relative to the inner tube 13, the front end of the core tube 14 is provided with a conical pushing head 15, the front part of the conical pushing head 15 is conical, the rear part of the conical pushing head 15 is inverted conical, the side surface of the conical pushing head 15 is provided with an insertion hole 151, the core tube 14 is hollow, a through hole is arranged inside the conical pushing head 15, the rear end of the core tube 14 is provided with an injection connector 141 which can be connected with an injector, and the whole pushing tube assembly can move forward along the aorta through. The front end of the inner tube 13 is provided with a main bracket front fixing component 131 which comprises a base, and the upper surface of the base is provided with a plurality of hanging claws 1311 along the circumferential direction; the front fixing component of the main support can anchor the bare support at the front end of the main support part to realize accurate positioning and releasing of the bare support.

As shown in fig. 1, the rear end of the first casing 11 is provided with a first connection assembly 3, the second casing 12 is inserted into the first connection assembly 3 and the first casing 11, as shown in fig. 3, the first connection assembly 3 comprises a first connection sleeve 31, an injection sleeve 32 and a first sealing and locking mechanism 33 which are connected in sequence from front to back, the rear end of the first casing 11 is fixed at the front inside the first connection sleeve 31, the front end of the injection sleeve 32 is fixed at the rear inside the first connection sleeve 31, as shown in fig. 1, the side of the injection sleeve 32 is communicated with an injection pipe 321, the end of the injection pipe 321 is provided with an injection joint which can be connected with an injector, the first sealing and locking mechanism 33 is used for sealing the gap between the first casing 11 and the second casing 12 and locking the second casing 12, when the first casing 11 is filled with liquid, the liquid will not leak from the gap between the first casing and the second casing, the second casing 12 can move back and forth in the first casing 11, when the first seal locking mechanism 33 locks the second sleeve 12, the second sleeve 12 cannot move back and forth relative to the first sleeve 11.

The first seal locking mechanism 33 comprises a first housing connected to the rear end of the injection sleeve 32, the first housing comprises a sleeve portion 331, a top cover 332 and a bottom cover 333, the top cover 332 has an H-shaped longitudinal section, the front end of the top cover is sleeved and fixed on the rear end of the injection sleeve 32, the sleeve portion 331 is fastened to the lower portion of the top cover 332 and can rotate relative to the top cover, a flexible sealing sleeve 334 sleeved on the second sleeve 12 is arranged in the first housing, a first inner flange 3321 lightly pressing the outer periphery of the flexible sealing sleeve 334 is arranged in the top cover 332 of the first housing, the second sleeve 12 can move relative to the flexible sealing sleeve 334, a second inner flange 3311 is arranged in the inner lower portion of the sleeve portion 331 of the first housing, an outer flange 3341 located below the second inner flange 3311 is arranged at the bottom of the flexible sealing sleeve 334, the bottom cover 333 is fixed at the bottom of the sleeve portion 331 of the first housing and presses the outer flange 3341, when the sleeve portion 331 is, while the upper portion of the flexible boot seal 334 is pressed against the outer circumference of the second sleeve 12 without rotation, the lower portion of the flexible boot seal 334 twists to tie up the second sleeve 12 and lock the second sleeve 12 so that the second sleeve 12 cannot move back and forth relative to the first sleeve 11.

As shown in fig. 1, the second connection assembly 4 is disposed at the rear end of the second casing 12, the second connection assembly 4 includes a second connection sleeve 41 and a second sealing and locking mechanism 42, the second sealing and locking mechanism 42 is used for sealing the gap between the second casing 12 and the inner pipe 13 and locking the inner pipe 13, so that the liquid in the second casing 12 cannot leak from the gap between the second casing 12 and the inner pipe 13, when the second sealing and locking mechanism 42 locks the inner pipe 13, the inner pipe 13 cannot move back and forth in the second casing 12, and when the second sealing and locking mechanism 42 is released, the inner pipe 13 can move back and forth in the second casing 12.

The second sealing and locking mechanism 42 includes a sealing gasket 421 and a second housing 422 which are sleeved on the inner tube 13, the rear end of the second sleeve 12 is a bell mouth 121, a compression column 411 which compresses the bell mouth 121 is arranged inside the second connecting sleeve 41, the compression column 411 is arranged on the inner tube 13 in a penetrating manner, the front end of the second sleeve is in a conical shape corresponding to the bell mouth 121, a first upper cavity 4221 is arranged on the upper portion of the second housing 422, an external thread is arranged on the upper portion of the second housing 422, a corresponding internal thread is arranged on the lower portion of the second connecting sleeve 41, the upper portion of the second housing 422 is in threaded connection with the second connecting sleeve 41, so that the sealing gasket 421 is arranged at the bottom of the first upper cavity 4221 through the compression column 411, and the sealing gasket 421 plays a role in sealing the gap. The second sealing and locking mechanism 42 further comprises a first opening locking sleeve 423, a first pressing ring 424 and a first pressing cap 425 which are sequentially sleeved at the rear end of the inner tube 13, a first lower cavity 4222 for accommodating the first opening locking sleeve 423, the first pressing ring 424 and the first pressing cap 425 is arranged at the lower part in the second shell 422, the first pressing cap 425 is connected into the first lower cavity 4222 in a threaded manner, a plurality of axial openings are arranged on the side wall of the lower part of the first opening locking sleeve 423, the bottom of the first opening locking sleeve 423 is conical, the upper part of the first pressing ring 424 is a conical groove, when the first pressing cap 425 abuts against the first pressing ring 424, the first pressing ring 424 can press against the bottom of the first open locking sleeve 423, the first split locking sleeve 423 is reduced in diameter to lock the inner tube 13, so that the inner tube 13 cannot move back and forth inside the second sleeve 12, a side hole 4223 is provided at the side of the first lower cavity 4222 at the lower part inside the second casing 422 for passing each guide wire, and each guide wire can be passed into the second sleeve 12 of the pusher tube assembly through the side hole 4223.

The release device for the vascular stent further comprises a main stent release assembly, as shown in fig. 2, the main stent release assembly comprises a main stent bundle diameter guide wire 22 which is arranged in a second sleeve 12 of an outer sleeve in a penetrating mode, and a main stent front fixing component 131 arranged at the front end of an inner tube 13, the main stent bundle diameter guide wire 22 penetrates through a side hole 4223 in the bottom and extends to a conical pushing head 15, the front end of the main stent bundle diameter guide wire 22 is inserted into a jack 151 of the conical pushing head 15, the front end of the main stent bundle diameter guide wire 22 is prevented from being exposed, if the front end of the main stent bundle diameter guide wire 22 is exposed, the risk of puncturing a blood vessel exists, the main stent front fixing component 131 comprises a base fixed at the front end of the inner tube 13, and a plurality of hanging claws 1311 which.

The pushing and releasing device for the blood vessel stent further comprises two branch stent bundle diameter guide wires which are used for being arranged in an outer sleeve in a penetrating mode, for example, one branch stent bundle diameter guide wire 23 comprises a bridging guide wire section 231 and a safety guide wire section 232, a branch stent bundle diameter guide sleeve 233 which is positioned between the bridging guide wire section 231 and the safety guide wire section 232 is arranged on the branch stent bundle diameter guide wire 23, the branch stent bundle diameter guide wire 23 in the embodiment is a whole guide wire, a positioning block 234 is arranged on the branch stent bundle diameter guide wire 23, the front part and the rear part of the branch stent bundle diameter guide wire 23, which are positioned on the positioning block 234, are respectively the bridging guide wire section 231 and the safety guide wire section 232, the branch stent bundle diameter guide sleeve 233 penetrates through the branch stent bundle diameter guide wire 23, one end of the branch stent bundle diameter guide sleeve is fixed on the positioning block 234, the positioning block 234 is a welding point which is welded on the branch stent bundle diameter guide wire 23, the end parts of the branch, thus, the sub-mount bundle diameter guide sleeve 233 does not separate from the positioning block 234, and the lower end of the safety guide wire section 232 is passed through the side hole 4223 and fixed. In other embodiments, the bridging guide wire section and the safety guide wire section of the sub-frame bundle diameter guide wire may also be two separate guide wires, and the bridging guide wire section and the safety guide wire section are respectively connected to the sub-frame bundle diameter guide sleeve, and only the sub-frame bundle diameter guide sleeve can be pulled. In addition, in other embodiments, the vascular stent delivery device may further include three branch stent bundle guide wires.

The rear ends of the branch frame bundle diameter guide wires are provided with locking mechanisms, taking the locking mechanism at the rear end of the branch frame bundle diameter guide wire 23 as an example, as shown in fig. 5, the locking mechanism comprises a second opening locking sleeve 235, a fixed valve pressing cap 236 and a fixed valve locking shell 237, the second opening locking sleeve 235, the fixed valve pressing cap 236 and the fixed valve locking shell 237 are internally provided with through holes penetrating through the branch frame bundle diameter guide wire 23, a fixed valve lower cavity 2371 is arranged in the fixed valve locking shell 237, the top of the fixed valve lower cavity 2371 is provided with a tapered portion 2372 abutting against the second opening locking sleeve 235, the front end of the second opening locking sleeve 235 is a tapered portion, the outer wall of the front portion is provided with a plurality of axial openings, the fixed valve pressing cap 236 is in threaded connection with the fixed valve lower cavity 2371, and the fixed valve pressing cap 236 presses the second opening locking sleeve 235 in the fixed valve lower cavity 2371, so that the front end of the second opening locking sleeve 235 abuts against the tapered portion 2372, thereby the second opening locking sleeve 235 locks the rear end of the branch frame bundle diameter guide wire 23, preventing the safety guide wire section 232 from being pulled into the side hole 4223 as the bridging guide wire section 231 is pulled forward. The guide wires 21, the main stent bundle diameter guide wires 22 and the sub-stent bundle diameter guide wires 23 in the embodiment are all steel wires, so that the positions of the guide wires in the blood vessel can be seen under a scanner in the operation process, and the smooth operation is facilitated.

Referring to fig. 1, fig. 6 to fig. 10, the using method of the stent pushing and releasing device of the present embodiment is as follows:

(1) the main stent bundle diameter guide wire 22 and the two branch stent bundle diameter guide wires are arranged in the outer sleeve of the blood vessel stent pushing and releasing device in a penetrating way, and the first sleeve 11 can be pushed forwards along the second sleeve 12.

(2) Binding the blood vessel stent 5 shown in fig. 6, wherein the blood vessel stent 5 is provided with a skeleton made of steel wires, the exterior of the blood vessel stent is provided with a blood impermeable coating, the blood vessel stent 5 needs to be compressed before being sent into an aortic arch 61 due to thickness, the blood vessel stent 5 comprises a main stent 51, and the main stent 51 is communicated with a first sub-stent 52 and a second sub-stent 53 which respectively correspond to a brachiocephalic trunk 62 and a left common carotid 63 in fig. 9;

(2.1) binding a main support: as shown in fig. 7, the main support 51 is bound first, a plurality of groups of binding rope loop pairs are arranged on the main support 51 at intervals, as shown in fig. 8, each group of binding rope loop pair includes a first diameter rope loop 511 and a second diameter rope loop 512, the first diameter rope loop 511 is located at the front side, the second diameter rope loop 512 is located at the rear side, one end of each of the first diameter rope loop 511 and the second diameter rope loop 512 is sewn on the main support 51, the first diameter rope loop 511 passes through the front side of the main support 51, the second diameter rope loop 512 passes through the rear side of the main support 51, the main support 51 is compressed, the front end 5111 of the first diameter rope loop passes through the front end 5121 of the second diameter rope loop, and the main support diameter guide wire 22 passes through the front end 5111 of the first diameter rope loop, so that the first diameter rope loop 511 and the second diameter rope loop 512 compress the main support 51, and each group of rope loop pair is bound in this way, and the main support 51 is bound to be very small.

(2.2) compressing the first and second sub-racks 52, 53: the safe guide wire sections of the two sub-frame beam diameter guide wires are respectively penetrated into the first sub-frame 52 and the second sub-frame 53, and the first sub-frame 52 and the second sub-frame 53 are compressed and then respectively installed in the sub-frame beam diameter guide sleeves on the two sub-frame beam diameter guide wires.

(2.3) the first sleeve is pushed forward to compress the bundled main stent 51, the first sub-stent 52 and the second sub-stent 53 together into the first sleeve, and the outer sleeve of the blood vessel stent pushing and releasing device is pushed forward to the conical pushing head 15.

(3) The bridging guide wire sections of the two branch stent guide wires in the figure 1 are threaded from the femoral artery and reach the aortic arch 61 along the descending aorta 65 shown in figure 9, the bridging guide wire sections of the two branch stent guide wires respectively pass through the left common carotid artery 63 and the head arm trunk artery 62 above the aortic arch 61 and finally pass out of the left common carotid artery and the right upper limb artery, and the vascular stent pushing device is guided in from the femoral artery along the guide wire 21 and is conveyed into the aortic arch 61 along the guide wire 21 and through the descending aorta 65;

(4) the vessel stent pusher is pushed from the femoral artery to the aortic arch 61 along the descending aorta 65, the first cannula 11 is withdrawn, and then the vessel stent pusher is operated to push the main stent 51 of the vessel stent 5 into the aortic arch 61, and the bridging guidewire segment 231 of the branch stent bundle diameter guidewire 23 is respectively pulled to compress the first and second branch stents 52 and 53 in the branch stent bundle diameter guide sheath 233 into the superior innominate artery 62 and the left common carotid artery 63. And releasing the fixing device at the tail end of the safety guide wire of the branch frame bundle diameter guide wire, continuously pulling the bridging guide wire section 231, and releasing the first branch 52 and the second branch 53. The main stent 51 is rapidly released to expand by pulling the main stent bundle diameter guide wire 22.

As shown in fig. 9, since there is a branch of the left subclavian artery 64 above the aortic arch 61, after the stent 5 is placed, the main stent 51 will block the connection point between the aortic arch 61 and the left subclavian artery 64; therefore, in this embodiment, an artificial bypass vessel 66 is also required to be communicated between the left common carotid artery 63 and the left subclavian artery 64 through surgery, so as to ensure smooth blood supply to the left subclavian artery 64.

Of course, in other embodiments, the present invention may also be provided with three branch stent diameter guide wires penetrating through the outer cannula, so as to deliver the blood vessel stent shown in fig. 10 into the blood vessel, which is different from the middle blood vessel stent shown in fig. 6 in that the blood vessel stent in fig. 10 further includes a third branch stent 54, and the main stent in fig. 10 further includes three branch stents communicated with the three branch stents, which correspond to the brachiocephalic trunk artery 62, the left common carotid artery 63 and the left subclavian artery 64 in fig. 9, and the three branch stents can be guided into the brachiocephalic trunk artery 62, the left common carotid artery 63 and the left subclavian artery 64 through the three branch stent diameter guide wires.

Example 2: a stent pushing and releasing device, the structure of which is shown in fig. 11.

As shown in fig. 11, the difference from the embodiment 1 is that the front end of the first sleeve 11 of the stent-graft delivery device in this embodiment is preformed into an arc shape, the second sleeve 12 and the inner tube 13 are also constrained into an arc shape at the front end of the first sleeve 11, that is, before entering the human body, the front end of the entire stent-graft delivery device is arc-shaped, and the arc shape is matched with the aortic arch shape of the human body, so that, because the first sleeve 11, the second sleeve 12 and the inner tube 13 are flexible tubes, in the process of entering the blood vessel of the human body, the bending part at the front end can adapt to the trend of the blood vessel to deform, the front end bending part reaches the aortic arch, the conical pushing head 15 can smoothly advance along the aortic arch, and the front end bending part can also actively adapt to the shape of the aortic arch, so that the branch frame part and the opening of the branch artery on the aortic arch can be conveniently aligned.

The invention is explained in detail above with reference to the drawings and the embodiments; however, those skilled in the art will understand that various changes in the above embodiments and equivalent substitutions of related parts, structures and materials may be made without departing from the technical spirit of the invention, so as to form a plurality of specific embodiments, which are common variation ranges of the invention and will not be described in detail herein.

Claims (10)

1. The utility model provides a vascular support propelling movement release, includes the propelling movement pipe assembly, and this propelling movement pipe assembly includes outer tube, inner tube and core pipe, its characterized in that still includes:

the main support releasing assembly comprises a main support bundle diameter guide wire which is arranged in the outer sleeve in a penetrating mode, and a main support front fixing part which is arranged at the front end of the inner tube, wherein the main support front fixing part comprises a base, and a plurality of hanging claws which extend forwards are arranged on the upper surface of the base along the circumferential direction;

the two or three sub-frame beam diameter guide wires are used for being arranged in the outer sleeve in a penetrating mode, each sub-frame beam diameter guide wire comprises a bridging guide wire section and a safety guide wire section, and a sub-frame beam diameter guide sleeve located between the bridging guide wire section and the safety guide wire section is arranged on each sub-frame beam diameter guide wire.

2. The vessel stent pushing and releasing device according to claim 1, wherein the sub-stent bundle diameter guide wire is a whole guide wire, a positioning block is disposed on the sub-stent bundle diameter guide wire, the front and rear portions of the sub-stent bundle diameter guide wire located on the positioning block are the bridging guide wire section and the safety guide wire section, respectively, the sub-stent bundle diameter guide sleeve is threaded on the sub-stent bundle diameter guide wire, and one end of the sub-stent bundle diameter guide wire is fixed on the positioning block.

3. The stent push release device according to claim 1, wherein the bridging guide wire section and the safety guide wire section of the sub-stent bundle guide wire are two separate guide wires, and the bridging guide wire section and the safety guide wire section are respectively connected to the sub-stent bundle guide sleeve.

4. The vessel stent pushing and releasing device according to claim 1, wherein the outer sleeve comprises a first sleeve and a second sleeve, the front end of the first sleeve is preformed into an arc shape, the rear end of the first sleeve is provided with a first connecting component, the second sleeve is arranged in the first connecting component and the first sleeve in a penetrating manner, the first connecting component comprises a first connecting sleeve, an injection sleeve and a first sealing and locking mechanism, the first connecting sleeve, the injection sleeve and the first sealing and locking mechanism are sequentially connected, the injection sleeve is communicated with the injection sleeve, and the first sealing and locking mechanism is used for sealing a gap between the first sleeve and the second sleeve and locking the second sleeve; the second sleeve pipe rear end is equipped with second coupling assembling, second coupling assembling is including the second connecting sleeve and the sealed locking mechanism of second that connect gradually from beginning to end, the sealed locking mechanism of second is used for sealing the clearance and the locking of second sleeve pipe and inner tube the inner tube.

5. The vessel stent pushing and releasing device according to claim 4, wherein the first sealing and locking mechanism comprises a first housing connected to the rear end of the injection sleeve, a flexible sealing sleeve is arranged in the first housing and sleeved on the second sleeve, a first inner flange for pressing the outer periphery of the flexible sealing sleeve is arranged at the upper inner portion of the first housing, a second inner flange is arranged at the lower inner portion of the first housing, an outer flange located below the second inner flange is arranged at the bottom of the flexible sealing sleeve, and a bottom cover for pressing the outer flange is arranged at the bottom of the first housing.

6. The vessel stent pushing and releasing device according to claim 4, wherein the second sealing and locking mechanism comprises a sealing gasket and a second housing, the sealing gasket is sleeved on the inner tube and is arranged between the second connecting sleeve and the second housing in a pressing manner, a first opening locking sleeve, a first pressing ring and a first pressing cap are sequentially sleeved at the rear end of the inner tube, a first lower cavity is arranged at the lower portion inside the second housing, and the first pressing cap is in threaded connection with the first lower cavity.

7. The vessel stent pushing and releasing device according to claim 6, wherein the rear end of the second sleeve is a bell mouth, a pressing column for pressing the bell mouth is arranged inside the second connecting sleeve, a first upper cavity is arranged at the upper part inside the second housing, and the sealing gasket is pressed at the bottom of the first upper cavity through the pressing column.

8. The stent push and release device according to claim 6, wherein a side hole for passing each guide wire is arranged on the side of the first lower cavity of the inner lower part of the second shell.

9. The vessel stent pushing and releasing device according to claim 1, wherein locking mechanisms are respectively disposed at rear ends of the branch stent bundle guide wires, each locking mechanism includes a second opening locking sleeve, a fixed valve pressing cap and a fixed valve locking shell, a through hole and a fixed valve lower cavity are disposed in the fixed valve locking shell, a tapered portion abutting against the second opening locking sleeve is disposed at a top of the fixed valve lower cavity, and the fixed valve pressing cap is in threaded connection with the fixed valve lower cavity.

10. The vessel stent pushing and releasing device according to claim 1, wherein a conical pushing head is arranged at the front end of the core tube, an injection joint is arranged at the rear end of the core tube, a jack is arranged on the side surface of the conical pushing head, a through hole is arranged inside the conical pushing head, guide wires can pass through the through holes of the core tube and the conical pushing head, and the main stent bundle guide wire and the sub-stent bundle guide wire are all steel wires.

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