CN109091274B - Method for crimping a stent - Google Patents

Method for crimping a stent Download PDF

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Publication number
CN109091274B
CN109091274B CN201811025046.3A CN201811025046A CN109091274B CN 109091274 B CN109091274 B CN 109091274B CN 201811025046 A CN201811025046 A CN 201811025046A CN 109091274 B CN109091274 B CN 109091274B
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China
Prior art keywords
flexible
press
slender
bracket
stent
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CN201811025046.3A
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CN109091274A (en
Inventor
宋亚丽
魏征
谢建
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Puyi (Shanghai) Biotechnology Co.,Ltd.
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Puyi Shanghai Biotechnology Co ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

The invention discloses a method for pressing and holding a bracket, and belongs to the technical field of medical equipment. The method for crimping the bracket comprises the following steps: the free end of the flexible slender pressure-holding body sequentially passes through a plurality of pores on the bracket along the circumferential direction of the bracket, then the two free ends of the flexible slender pressure-holding body penetrate out from the same side of the circumferential surface of the bracket, and finally the two free ends of the flexible slender pressure-holding body are tensioned. The method for pressing and holding the bracket is simple to operate, the phenomenon of bracket bouncing is avoided, special pressing and holding equipment is not needed, and the pressing and holding cost is low. In addition, after the crimping is finished, the flexible slender crimping body is drawn out from the pore of the bracket, and the difficulty is low.

Description

Method for crimping a stent
Technical Field
The invention relates to the technical field of medical equipment, in particular to a method for pressing and holding a bracket.
Background
With the rapid development of medical science and technology, interventional therapy has become a mainstay of medicine and surgery. The stent is a common medical instrument in interventional therapy, and the existing stent can be divided into a coronary vessel stent, a nasal sinus stent, an airway stent and the like according to different using positions. Before the stent is used, the volume of the stent needs to be reduced by pressing and holding so as to smoothly reach a diseased region, and after the stent reaches the diseased region, the stent can be supported on the diseased region by expanding.
For the coronary vessel stent which can be in a pressing and holding state for a long time, the stent can be uniformly pressed and held on a balloon catheter by means of pressing and holding equipment during production, the stent is sent to an artery stenosis part by using the balloon catheter when the stent is used, the stent is expanded by expanding the balloon, and the balloon is shrunk and can be separated from the stent after the stent is expanded in place. However, the crimping apparatus is expensive, resulting in a high crimping cost.
In the case of a stent which cannot be held in a compressed state for a long period of time, such as a sinus stent made of a polymer or an airway stent made of a metal material, the stent can be delivered to a lesion site only immediately after being compressed by a doctor on site at the time of treatment. The method for on-site crimping is generally completed by means of a crimping box and a crimping belt, the crimping belt is firstly wound into a circular ring to be attached to the inner wall of the crimping box, then the whole stent is placed into an inner ring formed by the crimping belt, and crimping of the stent is realized by contracting the crimping belt or the crimping box. However, the pressing method has a great disadvantage in pressing, when the width of the pressing band is smaller than the length of the bracket, the bracket is easy to bounce off during pressing, and when the width of the pressing band is larger than or equal to the length of the bracket, the bracket is wrapped in the pressing band after pressing is completed and is not easy to take out.
Therefore, how to provide a squeezing method which is simple in squeezing operation, low in squeezing cost and easy to take out after squeezing is a technical problem which needs to be solved urgently.
Disclosure of Invention
The invention aims to provide a method for crimping a bracket, which has low cost and convenient operation and is easy to take out after crimping.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for crimping a stent, comprising the steps of:
s1, sequentially passing the flexible slender press-holding body through a plurality of pores on the bracket along the circumferential direction of the bracket;
s2, the two free ends of the flexible slender press-and-hold body penetrate out from the same side of the circumferential surface of the bracket;
s3, simultaneously tensioning the two free ends of the flexible elongated crimp body.
Preferably, the flexible elongate pressure grip body is a wire-like structure or a ribbon-like structure.
Preferably, the contact surface of the belt-shaped structure and the bracket is a circular arc surface.
Preferably, the two free ends of the flexible elongate pressure grip body protrude through the same aperture of the holder.
Preferably, the number of the flexible slender press-holding bodies is one, and the flexible slender press-holding bodies surround the bracket for one circle; alternatively, the first and second electrodes may be,
the number of the flexible slender pressing and holding bodies is multiple, the flexible slender pressing and holding bodies are arranged along the axial direction of the support at intervals, and each flexible slender pressing and holding body surrounds the support for a circle.
Preferably, the flexible slender crimping bodies are sequentially penetrated through the pores at intervals of the same number in the circumferential direction of the stent.
Preferably, a plurality of the flexible slender crimping bodies are uniformly arranged along the axial direction of the bracket.
Preferably, the flexible elongate pressure grip body has a tensile strength greater than F/2n, where F is the stent pressure grip and n is the number of flexible elongate pressure grip bodies.
Preferably, step S3 is preceded by:
both free ends of the flexible elongated crimp body are simultaneously passed through the through-holes provided in the spacer.
Preferably, the spacer is provided with a plurality of through holes, and each through hole correspondingly penetrates through at least one flexible slender pressure holding body.
The invention has the beneficial effects that:
the invention provides a method for pressing and holding a bracket, which is characterized in that a flexible slender pressing and holding body sequentially penetrates through a plurality of pores on the bracket along the circumferential direction of the bracket, two free ends of the flexible slender pressing and holding body penetrate out from the same side of the circumferential surface of the bracket, and the pressing and holding of the bracket can be realized by tensioning the two free ends of the flexible slender pressing and holding body. In addition, after the crimping is finished, the flexible slender crimping body is drawn out from the pore of the bracket, and the difficulty is low.
Drawings
FIG. 1 is a flow chart of a method for crimping a stent provided by the present invention;
FIG. 2 is a schematic view of a single flexible elongated crimp body and stent provided by the present invention;
figure 3 is a schematic view of a plurality of flexible elongated crimping bodies and a stent provided by the present invention.
In the figure:
1. a support; 101. a pore; 2. a flexible elongated pinch grip body.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
The present embodiment provides a method for crimping a stent, which is capable of reducing the diameter of the stent 1 before an interventional operation to reduce the difficulty of the stent 1 entering a lesion. The stent 1 has a tubular structure with both ends open, and the side wall thereof has a mesh structure with a plurality of pores 101, and when the stent 1 is expanded, the stent can abut against a lesion site to stably support the lesion site.
Specifically, as shown in fig. 1, the crimping method specifically includes the following steps: firstly, sequentially penetrating the free end of the flexible slender crimping body 2 through a plurality of pores 101 on the bracket 1 along the circumferential direction of the bracket 1; then two free ends of the flexible slender pressure-gripping body 2 penetrate out from the same side of the circumferential surface of the bracket 1; finally, both free ends of the flexible elongated crimp body 2 are simultaneously tensioned.
In the present embodiment, the flexible and elongated pressure-gripping body 2 can be wound on the side wall of the support 1 by sequentially passing the flexible and elongated pressure-gripping body 2 through the plurality of apertures 101 on the support 1 along the circumferential direction of the support 1, so as to avoid the flexible and elongated pressure-gripping body 2 from being separated from the support 1 when the support 1 is pressed, so as to flick the support 1, and the support 1 is polluted or damaged after falling on the ground or in other places. When the bracket is pressed, the diameter of the bracket 1 can be reduced by tensioning the two free ends of the flexible slender pressing and holding body 2, thereby completing the pressing and holding operation. After the support 1 is pressed and held, the support 1 in the pressed and held state is held by only one hand, if the two free ends of the flexible slender pressing and holding body 2 are in the knotted state and need to be cut off, the other hand pinches the other free end of the flexible slender pressing and holding body 2 to apply force, and then the flexible slender pressing and holding body 2 can be drawn out, so that the flexible slender pressing and holding body 2 is separated from the support 1. It should be noted that when the flexible slender pressure-gripping body 2 is pulled out, a gentle force is needed, and the force cannot be too strong, so as to avoid that the flexible slender pressure-gripping body 2 damages the coating on the surface of the stent 1 or cuts off the connection intersection points between the pores 101 on the stent 1 during the pulling-out process. Whole pressing process convenient operation, quick, and need not rely on other appurtenance, do not rely on medical personnel's experience level, more can not produce too much operation rubbish, can reduce support 1 at the at utmost and press the cost of holding the operation, shorten the required preparation time of intervention operation.
In practice, the number of flexible elongated crimping bodies 2 can be chosen according to the length of the stent 1. When the length of the bracket 1 is short, one flexible and elongated pressure-gripping body 2 can complete the pressure-gripping operation, and the single flexible and elongated pressure-gripping body 2 can be arranged in the middle of the bracket 1 as shown in fig. 2, but in other embodiments, the single flexible and elongated pressure-gripping body 2 can also be arranged at the end of the bracket 1. When the length of the support 1 is long, a plurality of flexible and elongated pressure and grip bodies 2 can be arranged on one support 1 at the same time, and the plurality of flexible and elongated pressure and grip bodies 2 are arranged at intervals along the axial direction of the support 1, preferably uniformly. In this embodiment, as shown in fig. 3, three flexible and elongated pressure-gripping bodies 2 may be disposed on one support 1, and the three flexible and elongated pressure-gripping bodies 2 may be uniformly distributed on the support 1. In order for a medical staff to pull the three flexible and elongated pressure and grip bodies 2 at the same time, in the embodiment, the free ends of the three flexible and elongated pressure and grip bodies 2 are passed out from the independent corresponding apertures on the same axis. Of course, in other embodiments, for some stents with large clamping force, more than two flexible elongated clamping bodies 2 can be arranged in a centralized and simultaneous manner. When the flexible slender pressure-grip body 2 is pulled tight, two fingers can be used to clamp two free ends of the flexible slender pressure-grip body 2, and then the force is applied to pull tight in the horizontal direction. It should be noted that the flexible elongated pressure grip body 2 must be tensioned horizontally, and if the pressure grip body is pulled obliquely, the stent 1 will be curled, which will affect the later use of the stent 1.
Further, in order to facilitate the flexible elongated crimp body 2 to pass through the aperture 101 of the stent 1, the flexible elongated crimp body 2 may be provided as a linear structure or a ribbon structure having a width smaller than the aperture 101. Further, in the present embodiment, in order to avoid the flexible elongated pressure-grip body 2 and the stent 1 from contacting and rubbing against each other to damage the stent 1 when the flexible elongated pressure-grip body 2 is pulled, a smooth wire or ribbon is selected as the flexible elongated pressure-grip body 2, and two side surfaces of smaller width where the ribbon contacts the stent 1 are provided as circular arc surfaces. In order to enable the flexible and slender pressure-gripping body 2 to wind around the support 1 for one circle, the length of the flexible and slender pressure-gripping body 2 is set to be longer than the length of the support 1 in the circumferential direction, and the length exceeding the length is preferably about 2cm, so that excessive materials are not wasted, and the medical staff can pinch the free end of the flexible and slender pressure-gripping body 2 to apply force when pulling the flexible and slender pressure-gripping body.
In order to facilitate the application of force and avoid damaging the bracket 1 during the application of force, a spacer can be arranged at the free end of the flexible slender pressure holding body 2, and the spacer can be a card with a small hole, a clamping groove or a card box and the like. After the two free ends of the flexible elongated pressure grip body 2 are passed out from the same side of the holder 1, the free ends of the flexible elongated pressure grip body 2 may be passed through the through holes provided in the spacer and then the two free ends of the flexible elongated pressure grip body 2 are simultaneously tensioned. Certainly, after the free end of the flexible slender pressure holding body 2 passes through the isolating piece, the two free ends of the flexible slender pressure holding body 2 can be knotted, medical workers can complete the pressure holding operation by pulling the knotted parts of the two free ends, the operation is simple and convenient, and the falling is not easy to occur. After the pressing and holding are finished, the knotted part of the flexible slender pressing and holding body 2 is untied, and the flexible slender pressing and holding body 2 can be pulled out from the bracket 1. When the support 1 is long and a plurality of flexible slender pressure holding bodies 2 need to be used, the length of the isolating piece can be lengthened, and a plurality of through holes are arranged at the positions, corresponding to the flexible slender pressure holding bodies 2, on the isolating piece, so that two free ends of each flexible slender pressure holding body 2 penetrate out of the corresponding through hole and then are knotted. When the distance between the adjacent flexible slender pressure-gripping bodies 2 is short, the flexible slender pressure-gripping bodies can selectively penetrate out of the same through hole, and when the distance between the adjacent flexible slender pressure-gripping bodies 2 is long, the flexible slender pressure-gripping bodies can selectively penetrate out of different through holes.
Further, in order to ensure that the stent 1 can be uniformly contracted when the two free ends of the flexible elongated pressure-gripping body 2 are pulled, the free ends of the flexible elongated pressure-gripping body 2 are sequentially penetrated through the same number of pores 101 in the circumferential direction of the stent 1, where the same number of pores 101 may be one, two or more, without limitation. Further, in order to further improve the shrinkage uniformity of the stent 1 and facilitate the medical staff to hold the two free ends at the same time, the two free ends of a flexible and slender pressure-gripping body 2 are passed out from the same aperture 101 on the stent 1. Of course, in other embodiments, the two free ends of the flexible elongated pressure grip body 2 may pass through different apertures 101, and one, two or more apertures may be provided between the two free ends, as long as the two free ends are ensured to pass through the same side of the flexible elongated pressure grip body 2. In addition, for the bracket 1 provided with a plurality of flexible elongated pressure and grip bodies 2, two free ends of each flexible elongated pressure and grip body 2 can penetrate through different gaps 101, taking three flexible elongated pressure and grip bodies 2 as an example, the flexible elongated pressure and grip body 2 positioned at the top of the bracket 1 can penetrate through one gap 101, the flexible elongated pressure and grip body 2 positioned at the middle of the bracket 1 can penetrate through two gaps 101, and the flexible elongated pressure and grip body 2 positioned at the bottom of the bracket 1 can penetrate through three gaps 101. However, in order to facilitate the medical staff to tighten the plurality of flexible elongated pressure-grip bodies 2 at the same time, it is preferable to thread the plurality of flexible elongated pressure-grip bodies 2 out of the apertures 101 located in the same row on the holder 1.
In order to ensure that the flexible and slender press-gripping body 2 has sufficient strength to avoid breaking when pressing the stent 1, in the present embodiment, the tensile strength of the flexible and slender press-gripping body 2 needs to be greater than F/2n, where F is the stent press-gripping force, n is the number of the flexible and slender press-gripping bodies, and the stent press-gripping force F is determined by the size and material of the stent 1. For example, for a stent 1 made of transparent polymer filaments with an outer diameter of 50mm and a length of 20mm, the stent grip force F is about 2.53N, and when a flexible elongated grip body 2 is used, the tensile strength is only greater than 1.27N. For the stent 1 made of transparent polymer silk threads with the outer diameter of 20mm and the length of 50mm, the stent pressure and grip force F is about 4.41N, and because the stent 1 is longer, two flexible slender pressure and grip bodies 2 are selected, and the tensile strength of each flexible slender pressure and grip body 2 is only larger than 1.10N.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (8)

1. A method for crimping a stent, comprising the steps of:
s1, sequentially enabling the flexible and slender press-and-hold body (2) to pass through a plurality of pores (101) on the support (1) along the circumferential direction of the support (1), wherein the tensile strength of the flexible and slender press-and-hold body (2) is greater than F/2n, F is the support press-and-hold force, and n is the number of the flexible and slender press-and-hold bodies;
s2, two free ends of the flexible slender press-and-hold body (2) penetrate out from the same side of the circumferential surface of the bracket (1);
simultaneously enabling two free ends of the flexible slender press-holding body (2) to penetrate through holes formed in an isolating piece, wherein the isolating piece is a card, a clamping groove or a clamping box with the through holes;
-knotting the two free ends of the flexible elongated press-and-grip body (2);
s3, pulling the knotted parts of the two free ends of the flexible slender press-and-hold body (2);
after the pressing and holding are finished, the knotted part is untied, and then the flexible slender pressing and holding body (2) is pulled out of the bracket (1).
2. The method for crimping a stent of claim 1,
the flexible slender press-holding body (2) is of a linear structure or a belt-shaped structure.
3. The method for crimping a stent of claim 2,
the contact surface of the belt-shaped structure and the bracket (1) is an arc surface.
4. The method for crimping a stent of claim 1,
two free ends of the flexible slender press-holding body (2) penetrate out of the same pore (101) of the bracket (1).
5. The method for crimping a stent of claim 1,
the number of the flexible slender press-holding bodies (2) is one, and the flexible slender press-holding bodies surround the bracket (1) for a circle; alternatively, the first and second electrodes may be,
the number of the flexible slender press-holding bodies (2) is multiple, the flexible slender press-holding bodies (2) are arranged along the axial direction of the support (1) at intervals, and each flexible slender press-holding body (2) surrounds the support (1) for a circle.
6. The method for crimping a stent of claim 5,
in the circumferential direction of the bracket (1), the holes (101) of the flexible slender press-holding body (2) are sequentially arranged in a penetrating way at intervals of the same number.
7. The method for crimping a stent of claim 5,
the plurality of flexible slender press-holding bodies (2) are uniformly arranged along the axial direction of the bracket (1).
8. The method for crimping a stent of claim 1,
the isolating piece is provided with a plurality of through holes, and each through hole correspondingly penetrates through at least one flexible slender pressing and holding body (2).
CN201811025046.3A 2018-09-04 2018-09-04 Method for crimping a stent Active CN109091274B (en)

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Application Number Priority Date Filing Date Title
CN201811025046.3A CN109091274B (en) 2018-09-04 2018-09-04 Method for crimping a stent

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Application Number Priority Date Filing Date Title
CN201811025046.3A CN109091274B (en) 2018-09-04 2018-09-04 Method for crimping a stent

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CN109091274B true CN109091274B (en) 2021-05-07

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113081387B (en) * 2019-12-23 2023-12-05 先健科技(深圳)有限公司 Covered stent, covered stent conveying system and covered stent loading method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101045022B (en) * 2006-03-30 2010-08-25 温宁 Self-expanding stent axial wire-drawing tensioning mechanism
CA2732355A1 (en) * 2008-08-01 2010-02-04 Intersect Ent, Inc. Methods and devices for crimping self-expanding devices
CN101856277B (en) * 2009-04-10 2012-02-01 王涛 Recyclable unidirectional valve covered stent
KR20100119068A (en) * 2009-04-30 2010-11-09 (주) 태웅메디칼 Stent removal can strain the structure of the hooks
AU2010210022B1 (en) * 2010-08-05 2011-09-08 Cook Incorporated Stent graft having a marker and a reinforcing and marker ring
CN103202735B (en) * 2013-04-01 2016-02-10 杭州启明医疗器械有限公司 Pulmonary artery valve replacement device and support thereof
CN106580529B (en) * 2016-12-26 2018-08-24 微创心脉医疗科技（上海）有限公司 The installation method and conveying device of holder in art

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Address after: Room 2206, building 1, 396 lishizhen Road, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai, 201203

Patentee after: Puyi (Shanghai) Biotechnology Co.,Ltd.

Address before: Room 218, traditional Chinese Medicine Innovation Park, 199 GuoShouJing Road, Pudong New Area, Shanghai, 201203

Patentee before: PUYI (SHANGHAI) BIOTECHNOLOGY Co.,Ltd.