CN216724880U - Support loading device - Google Patents
Support loading device Download PDFInfo
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- CN216724880U CN216724880U CN202121581520.8U CN202121581520U CN216724880U CN 216724880 U CN216724880 U CN 216724880U CN 202121581520 U CN202121581520 U CN 202121581520U CN 216724880 U CN216724880 U CN 216724880U
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Abstract
The utility model provides a bracket loading device which is used for loading a bracket into a sheath tube, wherein the bracket comprises a bracket main body, and the periphery of one end of the bracket main body is provided with a flange part; this support loading attachment includes: the compressor is used for reducing and crimping the bracket, and the crimped bracket is conveyed into a pre-pressing pipe; the reducer pipe is provided with a reducer pipe section with the inner diameter gradually reduced, the reducer pipe is arranged between the prepressing pipe and the sheath pipe, the large-diameter end of the reducer pipe section is in butt joint communication with the prepressing pipe, the small-diameter end of the reducer pipe section is in butt joint communication with the sheath pipe, and a support in the prepressing pipe is conveyed into the sheath pipe through the reducer pipe section; when the flange part on the bracket does not pass through the small-diameter end of the reducer pipe, the inner diameter of the small-diameter end is equal to that of the sheath pipe; when flange portion on the support passes through the path end of reducer pipe, further carry out the undergauge to the reducer pipe to make the internal diameter of path end be less than the internal diameter of sheath pipe, thereby make the diameter of flange portion when getting into the sheath pipe be less than the internal diameter of sheath pipe.
Description
Technical Field
The utility model relates to the technical field of medical instrument design, in particular to a stent loading device.
Background
The heart valve is a membrane-shaped structure which can be opened and closed in organs of a human or some animals, and four valves are arranged in the heart of each person, namely an aortic valve connecting a left ventricle and an aorta, a pulmonary valve connecting a right ventricle and a pulmonary artery, a mitral valve connecting a left atrium and the left ventricle and a tricuspid valve connecting the right atrium and the right ventricle, which all function as one-way valves, so that blood can only flow to the other direction from one direction but can not flow backwards.
With the development of socioeconomic and the aging of population, the incidence rate of valvular heart disease is obviously increased, and researches show that the incidence rate of valvular heart disease of the old people over 75 years old is up to 13.3%. At present, the traditional surgical treatment is still the first treatment method for patients with severe valvular diseases, but for the patients with advanced age, complicated multiple organ diseases, chest-open operation history and poor cardiac function, the traditional surgical treatment has high risk and high death rate, and some patients even have no operation chance.
The tricuspid valve, which is the atrioventricular valve of the right heart, is similar in structure to the mitral valve, and includes leaflets, an annulus, chordae tendinae, papillary muscles, and cardiac muscle. Transcatheter tricuspid valve replacement/repair has the advantages of no need of thoracotomy, small wound, quick recovery of patients and the like, and is widely concerned by experts and scholars.
In prior art stent designs, which typically have a flange structure such as flange 101 shown in fig. 1, the implantation of the stent requires the entire stent to be loaded into sheath 311 at the end of delivery system 312. On one hand, the radial compression dimension of the loading device is not smaller than the radial dimension of the sheath, which is to reduce the extra damage to the artificial valve before entering the sheath; on the other hand, the flange 101 is in a fluffy state, and the size of the flange is far larger than that of the bracket main body. Therefore, how to ensure that the flange 101 and the bracket 100 can safely and accurately enter the sheath becomes a difficult problem to be solved.
SUMMERY OF THE UTILITY MODEL
The utility model provides a bracket loading device for loading a bracket into a sheath tube, aiming at the problems in the prior art, and the bracket comprises a bracket main body, wherein a flange part is arranged on the periphery of one end of the bracket main body; it is characterized in that the bracket loading device comprises:
the compressor is used for reducing and crimping the bracket, and the crimped bracket is conveyed into a prepressing tube;
the reducer pipe is provided with a reducing pipe section with the inner diameter gradually reduced, the reducer pipe is arranged between the prepressing pipe and the sheath pipe, the large-diameter end of the reducing pipe section is in butt joint communication with the prepressing pipe, the small-diameter end of the reducing pipe section is in butt joint communication with the sheath pipe, and a support in the prepressing pipe is conveyed into the sheath pipe through the reducing pipe section;
when the flange part on the bracket does not pass through the small-diameter end of the reducer pipe, the inner diameter of the small-diameter end is equal to that of the sheath pipe; when the flange part on the bracket passes through the small-diameter end of the reducer pipe, the reducer pipe is further reduced in diameter, so that the inner diameter of the small-diameter end is smaller than that of the sheath pipe, and the diameter of the flange part when entering the sheath pipe is smaller than that of the sheath pipe.
In some embodiments, a void is provided on the reducer pipe, the void being arranged parallel to the axial extension of the reducer pipe.
In some embodiments, the reducing device is arranged on the reducer pipe, and the reducing device is used for adjusting the gap to realize the further reducing.
In some embodiments, the reducing device is a hoop or a tie, and the reducing device further reduces the diameter of the reducer pipe by radially pressing the reducer pipe through the hoop or the tie.
In some embodiments, the reducer pipe is composed of a reducer pipe first part and a reducer pipe second part, and the reducer pipe first part and the reducer pipe second part are detachably assembled;
the gap is arranged at least one of the first part of the reducer pipe, the second part of the reducer pipe and the joint of the first part of the reducer pipe and the second part of the reducer pipe.
In some embodiments, a pre-pressing pipe installation section and a sheath pipe installation section are coaxially arranged at two ends of the reducing pipe section respectively; the inner diameter of the pre-pressing pipe mounting section is equal to that of the large-diameter end of the reducing pipe section, and the inner diameter of the sheath pipe mounting section is equal to that of the small-diameter end of the reducing pipe section; the pre-pressing pipe is installed in the pre-pressing pipe installation section, and the sheath pipe is installed in the sheath pipe installation section.
In some embodiments, the stent loading device further comprises a paddle, the flange portion is captured as the stent passes through the reducer, and the stent is adjusted by the paddle passing through the gap.
In some embodiments, further comprising at least one protective tube, the stent being threaded through the stent axial center prior to being crimped by the compressor.
In some embodiments, a plurality of protection tubes with diameters gradually decreasing from large to small are included, the protection tube with the large diameter is firstly selected to be arranged in the bracket in a penetrating mode for pressing, and then the protection tube with the small diameter is gradually selected to be arranged in the bracket in a penetrating mode for pressing.
In some embodiments, a delivery part of the delivery system is movably arranged in the sheath, and one end of the delivery part extends out of the outer sheath and is connected with the stent which is completely crimped; sleeving the prepressing pipe on the bracket, and then installing the reducer pipe on the prepressing pipe and the outer sheath pipe; the conveying part moves to pull the bracket to come out of the protective tube and enter the sheath tube through the reducer tube.
Due to the adoption of the technical scheme, compared with the prior art, the utility model has the following advantages and positive effects:
according to the stent loading device provided by the utility model, the diameter of the stent is reduced when the stent passes through the diameter-reducing tube so as to smoothly enter the sheath tube; and, when the flange portion on the support passes through the path end of reducer pipe, do further undergauge to the reducer pipe to the size that makes the path end is less than the sheath pipe internal diameter, thereby make the radial dimension of the flange that comes out from the path end be less than the internal diameter of sheath pipe certainly, can not touch with sheath pipe tip, thereby guaranteed that the support can be smooth carry in the sheath pipe, the form when the flange portion advances the sheath can not turn over and turn over, can not turn over.
Drawings
The above and other features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic view of a prior art stent installed in a sheath;
FIG. 2 is a schematic view of a stent according to the present invention;
FIG. 3 is a schematic view of the compressor compressing the stent of the present invention;
FIG. 4 is a schematic view of the compressed stent of the present invention;
FIG. 5 is a cross-sectional view of a reducer pipe according to the present invention;
FIG. 6 is a schematic exploded view of the reducer of the present invention;
FIG. 7 is a schematic diagram of the operation of the reducer pipe of the present invention;
FIG. 8 is a schematic view of the stent of the present invention after it has been attached to a delivery system;
FIG. 9 is a schematic view of the holder of the present invention installed in a pre-pressing pipe;
FIG. 10 is a schematic view of the reducer pipe of the present invention after being connected to the prepressing pipe and the sheath pipe;
FIG. 11 is a schematic view of the stent of the present invention after being loaded into a sheath.
Detailed Description
The present invention will be described in more detail below with reference to the accompanying drawings, which illustrate embodiments of the utility model. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
The utility model provides a stent loading device, which is used for loading a stent into a sheath at the end of a delivery system, mainly used for loading the stent with a flange part, such as a heart valve stent shown in figure 2; specifically, the stent comprises a stent body, the stent body comprises an outer stent 102 and an inner stent 103, a flange part 101 is arranged on the periphery of one end of the stent body, the flange part 101 is specifically a structure extending to one side far away from the stent body, and a valve 104 is further arranged in the center of the stent body 103.
Specifically, referring to fig. 2 to 11, the utility model provides a stent loading device, which comprises a compressor 3 and a reducer 4, wherein a stent is subjected to reducing crimping through the compressor 3, and the crimped stent is conveyed into a pre-pressing pipe 5; the reducing pipe 4 is provided with a reducing pipe section 410 with gradually reduced inner diameter, the large-diameter end of the reducing pipe section 410 is in butt joint communication with the prepressing pipe 5, the small-diameter end is in butt joint communication with the sheath pipe 311, and the support 100 in the prepressing pipe 5 is conveyed into the sheath pipe 311 through the reducing pipe section; when the flange part 101 on the bracket does not pass through the small-diameter end of the reducer pipe 4, the inner diameter of the small-diameter end is equal to that of the sheath pipe; when the flange portion on the holder passes through the small-diameter end of the reducer pipe 4, the reducer pipe 4 is further reduced in diameter so that the inner diameter of the small-diameter end is smaller than the inner diameter of the sheath 311, and the diameter of the flange portion when entering the sheath 311 is smaller than the inner diameter of the sheath 311.
According to the utility model, when the flange part 101 does not pass through the small-diameter end, the inner diameter of the small-diameter end is equal to that of the sheath tube 311, so that the diameter of the bracket is reduced, and the bracket is prevented from being damaged by diameter reduction transition; when the flange part 101 passes through the small-diameter end, the reducing treatment is performed on the reducer pipe 4, so that the inner diameter of the small-diameter end is smaller than that of the sheath pipe 311, the diameter of the flange part when entering the sheath is inevitably smaller than that of the sheath pipe, and the flange part is ensured to smoothly enter the sheath pipe.
In the present embodiment, the reducer pipe is provided with a gap 430, and the gap 430 is provided parallel to the axial extension of the reducer pipe. The gap 430 is provided to allow a deformation allowance when the reducer pipe is radially pressed and reduced in diameter
In this embodiment, the reducing device is further arranged on the reducer pipe for adjusting, and the reducing device is used for adjusting the gap to realize the further reducing.
Optionally, the diameter reducing means is a clip or a band. For example, the hoop 10 is sleeved on the reducing pipe section, the hoop is tightened, the inner diameter of the small-diameter end of the reducing pipe is smaller than that of the sheath pipe, the diameter of the flange when the flange enters the sheath is smaller than that of the sheath pipe, the flange part 101 can be prevented from touching the end part of the sheath pipe, and therefore the bracket can be conveyed into the sheath pipe smoothly, and the flange part 101 cannot be folded and bent when entering the sheath.
In this embodiment, the stent is contracted in the radial direction by passing through the compressor 3; the compressor can be directly used as a stent compressor in the prior art, and is not limited here.
Further, the stent loading device further comprises at least one protection tube, the protection tube is arranged at the axial center of the stent 100 in a penetrating manner before the stent 100 is crimped by the compressor, and the protection tube struts a valve 104 at the center of the stent; the protection tube is arranged in the embodiment, so that the valve at the center of the stent is protected, and damage caused by extrusion of the valve at the center in the stent compression process is avoided.
Further, the stent of the present embodiment is radially compressed by the compressor for multiple times to achieve radial gradual reduction of the stent until the stent is compressed to the target size as shown in fig. 4, so that the design is favorable for ensuring that the stent is not damaged; supporting, need a plurality of diameters by the big protective tube that diminishes gradually, select for use the protective tube 8 of major diameter to wear to establish in support 100 and press and hold earlier, then select for use the protective tube 6 of minor diameter to wear to establish in the support and press and hold gradually again.
In this embodiment, referring to fig. 5 and 7, the reducer pipe 4 is composed of a pre-pressing pipe installation section 440, a reducer pipe section 410, and a sheath pipe installation section 420, which are coaxially connected in sequence; the inner diameter of the pre-pressing pipe installation section 440 is equal to the inner diameter of the large-diameter end of the reducing pipe section 410, and the inner diameter of the sheath pipe installation section 420 is equal to the inner diameter of the small-diameter end of the reducing pipe section 410; the pre-pressure pipe 5 is installed in the pre-pressure pipe installation section 440, and the sheath 311 is installed in the sheath installation section 420. In this embodiment, the pre-pressing pipe 5 and the sheath pipe 311 are coaxially disposed at two ends of the reducing pipe section 410 by the arrangement of the pre-pressing pipe mounting section 440 and the sheath pipe mounting section 420, so that the stent 100 can be accurately conveyed.
In the present embodiment, as shown in fig. 6, the reducer pipe 4 is composed of two parts, namely, a reducer pipe first part 4-1 and a reducer pipe second part 4-2, which are disassembled and assembled; when the reducer pipe is used, the first part 4-1 and the second part 4-2 of the reducer pipe are surrounded on the outer walls of the prepressing pipe 5 and the sheath pipe 311, and the prepressing pipe 5 and the sheath pipe 311 are respectively arranged at the prepressing pipe installation section 440 and the sheath pipe installation section 420; then, the two ends of the first part 4-1 and the second part 4-2 of the reducer pipe are respectively fixed through a connecting piece, the connecting piece can be realized through structures such as a snap spring, and the like, and the fixing is not limited here.
Further, in use, after the flange portion 101 of the stent is moved into the sheath, the further reduced diameter state can be restored to a state in which the diameter is not further reduced, thereby removing the further radial gripping force applied to the stent to avoid excessive strain or damage to the valve caused by excessive compression of the stent.
In this embodiment, referring to fig. 5 again, the first part 4-1 and the second part 4-2 of the reducer pipe are both provided with a gap 430 and span three areas, namely a pre-pressing pipe installation section 440, a reducer pipe section 410 and a sheath pipe installation section 420; of course, in other embodiments, at least one of the first portion 4-1 of the reducer, the second portion 4-2 of the reducer, and the connection between the first portion 4-1 of the reducer and the second portion 4-2 of the reducer may be provided with the gap 430, which is not limited herein.
In this embodiment, a shifting piece is further included, and when the stent 100 passes through the reducer 4, if the flange portion is blocked, the shifting piece passes through the gap 430 and extends into the reducer 4, so as to adjust the stent and smoothly convey the stent into the sheath.
In this embodiment, the delivery portion of the delivery system 310 is movably mounted within the sheath 311, and one end of the delivery portion extends out of the sheath 311 and is connected to the stent that has been crimped, as shown in fig. 10; the delivery part of the delivery system 310 comprises an inner sheath 312 and a guide wire lumen 314 connected with the inner sheath 312, wherein the guide wire lumen 314 is coaxially assembled with the inner sheath 312, and the other end is connected with a Tip head. When the stent is sheathed, the Tip head is detached from 314 and then passes through the protective tube 6 at the center of the stent. The Tip head is mainly used for protecting the native tissues such as blood vessels and valve ring and valve leaflets during the process of implanting the stent, and has the functions of guiding the implantation of the delivery system and the like; the Tip head can be fixed to 314 or can be detachable, and in the embodiment, the Tip head is detachable; the protection tube 6 mainly functions to protect the artificial valve from being damaged when the valve 314 passes through the inside of the stent; the hanger base 313 is fixed on the guide wire lumen 314, and the bracket which is pressed and held is hung on the hanger base 313 through the hanger 105 on one end of the bracket to realize connection. Of course, in other embodiments, the connection mode between the stent and the delivery part is not limited to the above, and can be adjusted according to specific situations.
Then the pre-pressing pipe 5 is sleeved on the bracket 100, as shown in fig. 9; then the reducer tube 4 is mounted on the pre-pressure tube 5 and the outer sheath tube 311, as shown in fig. 10; the delivery section moves, pulling the stent 100 out of the protection tube through the reducer tube 4 into the sheath 311, as shown in fig. 11.
It will be appreciated by those skilled in the art that the utility model can be embodied in many other specific forms without departing from the spirit or scope thereof. Although embodiments of the present invention have been described, it is to be understood that the present invention should not be limited to those precise embodiments, and that various changes and modifications can be effected therein by one skilled in the art without departing from the scope or spirit of the utility model as defined by the appended claims.
Claims (10)
1. A bracket loading device is used for loading a bracket into a sheath tube, and comprises a bracket main body, wherein a flange part is arranged on the periphery of one end of the bracket main body; it is characterized in that the bracket loading device comprises:
the compressor is used for reducing and crimping the bracket, and the crimped bracket is conveyed into a prepressing tube;
the reducer pipe is provided with a reducer pipe section with the inner diameter gradually reduced, the reducer pipe is arranged between the prepressing pipe and the sheath pipe, the large-diameter end of the reducer pipe section is in butt joint communication with the prepressing pipe, the small-diameter end of the reducer pipe section is in butt joint communication with the sheath pipe, and a support in the prepressing pipe is conveyed into the sheath pipe through the reducer pipe section;
when the flange part on the bracket does not pass through the small-diameter end of the reducer pipe, the inner diameter of the small-diameter end is equal to that of the sheath pipe; when flange portion on the support passes through when reducing pipe's path end, it is further right reducing pipe carries out the undergauge to make the internal diameter of path end is less than the internal diameter of sheath pipe, thereby make flange portion when getting into the sheath pipe the diameter is less than the internal diameter of sheath pipe.
2. The stent loading device of claim 1, wherein the reducer has a void disposed thereon, the void being disposed parallel to an axial extension of the reducer.
3. The stent loading device of claim 2, further comprising a reducing means adjustment disposed on the reducer, the reducing means for adjusting the gap to achieve the further reduction.
4. The stent loading device of claim 3, wherein the reducing means is a band or a tie, and further reduction of the reducer is achieved by radially compressing the reducer with the band or tie.
5. The stent loading device of claim 2, wherein the reducer comprises a reducer first portion and a reducer second portion, the reducer first portion and the reducer second portion being removably assembled;
the reducer comprises a reducer pipe, a first gap, a second gap and a connecting part, wherein the first gap is arranged on the first part of the reducer pipe, the second gap is arranged on the second part of the reducer pipe, and the connecting part of the first part of the reducer pipe and the second part of the reducer pipe is provided with the gap.
6. The stent loading device according to any one of claims 1 to 5, wherein a pre-pressing tube mounting section and a sheath tube mounting section are coaxially arranged at two ends of the reducing tube section respectively; the inner diameter of the pre-pressing pipe mounting section is equal to that of the large-diameter end of the reducing pipe section, and the inner diameter of the sheath pipe mounting section is equal to that of the small-diameter end of the reducing pipe section; the pre-pressing pipe is installed in the pre-pressing pipe installation section, and the sheath pipe is installed in the sheath pipe installation section.
7. The stent loading device of claim 2, further comprising a paddle, wherein the flange portion is captured as the stent passes through the reducer, and wherein the stent is adjusted by the paddle passing through the gap.
8. The stent loading device of claim 1, further comprising at least one protective tube, the stent being threaded through an axial center of the stent prior to being crimped by a compressor.
9. The stent loading device according to claim 8, comprising a plurality of protective tubes with diameters gradually decreasing from large to small, wherein the protective tube with the large diameter is inserted into the stent to be crimped, and then the protective tube with the small diameter is inserted into the stent to be crimped.
10. The stent loading device according to claim 1, wherein for loading the stent into a sheath of a delivery system, a delivery part of the delivery system is movably mounted in the sheath, and one end of the delivery part extends out of the sheath and is connected with the crimped stent; sleeving the prepressing pipe on the bracket, and then installing the reducer pipe on the prepressing pipe and the sheath pipe; the conveying part moves to pull the bracket to come out of the protective tube and enter the sheath tube through the reducer tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121581520.8U CN216724880U (en) | 2021-07-12 | 2021-07-12 | Support loading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121581520.8U CN216724880U (en) | 2021-07-12 | 2021-07-12 | Support loading device |
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| Publication Number | Publication Date |
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| CN216724880U true CN216724880U (en) | 2022-06-14 |
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| CN202121581520.8U Active CN216724880U (en) | 2021-07-12 | 2021-07-12 | Support loading device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113332000A (en) * | 2021-07-12 | 2021-09-03 | 上海臻亿医疗科技有限公司 | Support loading system and method |
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2021
- 2021-07-12 CN CN202121581520.8U patent/CN216724880U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113332000A (en) * | 2021-07-12 | 2021-09-03 | 上海臻亿医疗科技有限公司 | Support loading system and method |
| CN113332000B (en) * | 2021-07-12 | 2024-04-26 | 上海臻亿医疗科技有限公司 | Bracket loading system and method |
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