KR20170005661A - Medical stent enhanced the resistance of the end portions - Google Patents

Medical stent enhanced the resistance of the end portions Download PDF

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Publication number
KR20170005661A
KR20170005661A KR1020150096026A KR20150096026A KR20170005661A KR 20170005661 A KR20170005661 A KR 20170005661A KR 1020150096026 A KR1020150096026 A KR 1020150096026A KR 20150096026 A KR20150096026 A KR 20150096026A KR 20170005661 A KR20170005661 A KR 20170005661A
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KR
South Korea
Prior art keywords
stent
cylindrical body
washer
diameter
shaped end
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Application number
KR1020150096026A
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Korean (ko)
Inventor
명병철
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주식회사 비씨엠
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Priority to KR1020150096026A priority Critical patent/KR20170005661A/en
Publication of KR20170005661A publication Critical patent/KR20170005661A/en

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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
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/89—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
    • 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
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • 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
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure

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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 present invention relates to a medical stent which is used to connect two adjoining tissues to each other through a body organs to serve as a passage for an endoscopic surgery or the like, drainage or shunt of a solution, a green tea solution, etc., Shaped end of a hollow cylindrical body formed by weaving a shape memory alloy wire crosswise in a rhomboidal shape so as to form an end portion of a washer-shaped end, wherein a gap between the cells of the end portion constituting the stent is set to an extreme To provide a resistance-strengthening ring in which the stent is tightly adhered to the stent, so as to firmly maintain the position where the stent is connected to the stent when the stent is inserted into the stent, The cylindrical body having a diameter larger than the diameter of the cylindrical body, A stent for medical use, comprising: a stent having a single diameter; (14) formed by outwardly bending at both longitudinal ends of the cylindrical body (12) of the stent and a plurality of resiliently reinforcing rings (14) for providing multiple overlapping elasticities around the periphery of the expanded washer- 16) are formed.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a medical stent,

The present invention relates to a medical stent (hereinafter, referred to as " medical stent ") that is used to connect two adjacent tissues of a human body (gall bladder, pancreas, etc.) And more specifically, to a method of manufacturing a hollow cylindrical cylindrical body, in which a super-elastic shape memory alloy wire is formed by weaving a cross-shaped rhombus-shaped cell in a cross-shaped fashion and both ends of the hollow cylindrical body are expanded and bent to form a washer- And the end portion of the stent is closely adhered to each other to form a superimposed resistance-strengthening ring, so that the stent can be firmly held in the through-connecting position when the human body is implanted.

Stents that are widely used for medical use include stents in the body where blood, food, and fluids move through the lumen, arteriosclerosis, thrombosis, benign and malignant tumors, post operative complications, And has been used as an interventional procedure since the 1980s.

These stents are largely divided into non-vascular and vascular stents. They are self-expansive stents that have self-elasticity as a metal or polymer network structure and are contracted when external force is exerted and returned to the original state when external force is removed. .

The procedure using the stent is roughly classified into vascular stent implantation and non-vascular stent implantation.

Electron vascular stenting is widely known as a procedure in which a narrowed blood vessel is dilated by putting a 3 mm to 4 mm hole in the thigh and then pushing a thin tube called a "catheter" to the lesion site through the femoral artery and then putting the stent into the lesion .

The latter type of non-vascular stenting is a procedure in which the esophagus is blocked or progressed due to stenosis of the esophagus by cancerous tissue or the like, it becomes impossible to ingest food into the mouth. In order to secure the input of food, (Balloon Catheter Tube) is inserted into the balloon to inflate the balloon (Balloon) is known.

The stent used in the above-described surgical procedures has been disclosed by improving the function of the stent by various structures to date.

Such a stent may be formed by crossing a hyperelastic shape memory alloy wire or a stainless steel wire at different positions, or by connecting a mountain bend portion and a fractured bend portion to each other by hooks to form a plurality of rhombic space portions And a hollow cylindrical body having a predetermined length is formed.

In addition, recently, stent for connecting procedure is used for approaching the internal organ of the human body such as the gallbladder or the longest, such as endoscopic procedure, drainage of aquaculture solution, green tea solution or the like, which is difficult to perform shunt .

That is, the adjacent tissues of the human organs such as the gallbladder, pancreas, and the like are passed through each other, and the stent is inserted so as to be connected to each other.

As a conventional technique shown in FIG. 1, a hollow cylindrical body 2 formed by interlacing an alloy wire such as a superelastic shape memory alloy as in U.S. Patent 6,620,122 is formed on both sides of an expanding portion 3 in the form of a dumbbell, (5) of the body organs (5) and inserted into the adjacent tissue (5) by the expanding portion (3).

Such conventional techniques have a problem in that when the external force due to the external motion of the human body and the internal movement of the human body is applied, the expanding portion slips off the procedure position frequently.

Comparing the size of the stent space (cell) between the body 2 and the expanded portion 3 on both sides of the body, the space of the expanded portion 3 is enlarged as compared with the space of the body 2 The force for supporting the external force is inevitably weakened as compared with the side of the body 2, so that there arises a problem such as the above-described disposition of the operation position.

As another prior art, U.S. Patent No. 8,454,632, which is shown in FIG. 2, is a technique that somewhat improves the above-described problem. In the conventional technique, both sides of a hollow cylindrical body 2 formed by interweaving an alloy wire such as a super- And the double wall flange 4 is formed by pushing a certain portion to the inside on both sides so as to be hooked on the adjacent tissue 5 so as to be prevented from being separated.

This is disadvantageous in that the manufacturing process of the stent can not be avoided in order to make the double wall flanges on both sides of the body larger than the cylindrical body.

That is, the stent is produced by interweaving an alloy wire so that it can be stretched in the axial direction, but it can not be stretched without restriction, and the stretching is limited within the range in which the rhombic cell shape can be deformed according to stretching.

Therefore, the double wall flanges located on both sides of the cylindrical body have to have a large diameter beforehand and complicated manufacturing process is required to form the double wall by thermoforming for shape memory.

In addition, since the procedure operator is directly pulled with an elastic bar or the like in the human body to form and maintain the double wall flange, there is a problem in that the procedure is complicated and can be performed only by a skilled person.

As a result, according to the conventional techniques, it is difficult to fix and attach the adjacent tissue in a state of elastic contact, and it is difficult to drain or drain a solution, a green tea solution, or the like due to the occurrence of a gap therebetween. There is a problem that there is a high possibility of departing from the treatment position to another position.

US 6620122 B2 US 8454632 B2 KR 1311756 B1

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art as described above, and aims to solve the following problems.

The present invention provides a medical stent with enhanced resistance of an end portion that is formed to integrally form a resistance strengthening ring made of a material of the stent itself at a longitudinal end portion of a stent penetrating through two adjacent tissue layers so as to prevent the stent from departing from a treatment position .

SUMMARY OF THE INVENTION The present invention provides a medical stent in which the end portion of a cylindrical stent of the same diameter is formed by erecting a washer-shaped end portion so as to be added to a stent of a mesh-like shape having the same diameter.

The present invention relates to a medical stent having a resistance-enhanced end portion that is easily operable at an end so that the washer-shaped end portion expands only by insertion of a conventional catheter by a practitioner in a surgical field and the washer- Lt; / RTI >

The present invention provides a medical stent with enhanced resistance at an end portion which is adapted to adjust the degree of overlapping of the resistance strengthening ring by adjusting the cylindrical stent section to be deformed to the washer- .

In order to solve the above-described problems, the present invention provides a stent which is formed by weaving two adjacent tissue layers and connected to each other and formed by weaving the same diameter, and the end portions in the longitudinal direction on both sides of the cylindrical body of the central portion of the stent are expanded in a washer- By forming a resistive strengthening ring that overlaps multiple and provides strong resilience to form a medical stent with enhanced end force resistance.

In the present invention, the number of times of stacking (number of turns) of the resistance strengthening rings that multiply over the periphery of the washer-shaped end portion to provide strong elasticity is adjustable to adjust the end resistance variable.

The present invention is characterized in that a washer-type end portion is attached to both ends of a cylindrical body of a stent central portion to be stuck to a procedure tissue layer of a human body, and a resisting force reinforcing ring provided on an outer periphery of a washer-

As described above, according to the present invention, since the resistance strengthening ring made of the stent itself is integrally formed at the longitudinal end of the stent supported over the pylorus of the stomach, there is an effect of preventing the stent from departing from the procedure position, Since the washer-type end portion is formed by being bent at the end portion of the stent, it is very easy to manufacture. By inserting the practitioner into the ordinary catheter in the surgical field, the washer-type end portion expands and the washer- And the degree of overlapping of the resistance strengthening rings is adjusted by adjusting the length of the cylindrical stent to be deformed into the washer-shaped end, so that a desired resistance force can be created, and a radial force after the procedure can be obtained. A strong resistance is generated with respect to the stent end strain So it will prevent inventors have multiple excellent effects such as a stent manufactured to securely support the stent position possible.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a conventional stent. FIG.
FIG. 2 is an external view of a procedure state of another conventional stent. FIG.
Figure 3 is a stent outline view in accordance with the present invention.
Fig. 4 is an enlarged view of the "A"
FIG. 5 is a cross-
6 is an external view of various embodiments of the stent of the present invention.
7 is a process chart showing the stent manufacturing process of the present invention.
Fig. 8 is a state view of the stent of the present invention. Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings.

3 to 5, the medical stent according to the present invention includes a cylindrical body 12 having a cylindrical body having a diameter larger than that of the cylindrical body at both ends of a cylindrical body of the stent for piercing and connecting two adjacent tissue layers. Shaped end 14 formed by outwardly bending at both longitudinal ends thereof and a radial force radially applied from the outside of the stent in multiple overlaps on the outer periphery of the expanded washer- And a medical stent (100) having a resistive strengthening ring (16) shaped like a resistance strengthened and having a resistance of an end portion strengthened.

The number of overlapping of the resistance strengthening rings 16 is adjustable in accordance with the length L of the stent extending and extending in the longitudinal direction of both sides of the cylindrical body 12 so that the end resistance can be varied.

In the case where the end distance L is short, the resilience strengthening ring 16, which provides multiple overlapping elasticity to the outer periphery of the washer-shaped end portion 14, is formed small in elasticity, and in the opposite case,

In addition, the stent of the present invention is configured such that the diameter of the end portion is changed in proportion to the diameter of the hollow portion of the stent 10 having a predetermined diameter.

That is, if the diameter of the hollow portion of the manufactured stent 10 is large, the diameter of the washer-shaped end portion 14 is increased and, in the opposite case, the stent 100 is made smaller.

6, the washer-shaped end portion 14 has a support surface 14a extending from the cylindrical body 12 to support the tissue structure layer to prevent it from coming off, The resisting force reinforcing ring 16 is provided to prevent the stent 100 from being displaced by an external force in the tissue to be treated, and to stably support the stent. Such a stent may be a stent interlaced to each other, To a stent having a plurality of rhombic space portions (cells) by connecting them in the form of a hook.

The stent manufacturing process of the present invention will be described in more detail with reference to the drawings.

7, the material stent 10 made by weaving a single diameter is inserted into a small diameter jig 20 in diameter with respect to the diameter of the stent, so as to define a central portion constituting the cylindrical body 12, (See Fig. 7 (b)).

The cylindrical body 12 is bound by another wire 24 with a margin of the end distance L while the stent is extended and exposed to both ends of the cylindrical body 12 (refer to FIG. 7 (c)), .

When the cylindrical body 12 at the center of the stent is bound to the jig 20 by the wire 24, the margin portion at both ends of the stent is tapered and deformed while expanding.

When the disk 26 having the center hole formed in the shape of a coin is pressed on both ends of the expanded stent by tapering in the shape of the fallopian tube, the end of the stent 10 is compressed from the tapered end until it is blocked by the fixing pin 22 As the shrinkage and movement are restricted by the fixing pin 22, the end portion of the disk 26 is expanded and bent outwardly by the compressive force to form a washer-shaped end portion 14, and the surplus stent portion has an expanded maximum radius of the washer- (See Fig. 7 (d)). As shown in Fig.

When the washer-shaped end portion 14 is formed by compression of the disk 26 at both ends, the disks 26 are bound to each other so as not to be separated (see Fig. 7 (e)), And the completed stent 100 is obtained.

Although the washer-shaped end 14 is perpendicular to the cylindrical body 12, the washer-shaped end 14 may be compressed by the disk 26 so as to have an obtuse angle or an acute angle.

Of course, when the internal angle of the cylindrical body 12 and the washer-shaped end 14 is formed at an obtuse angle or an acute angle, the angle of the surface of the disk 26 fitted to the jig 20 is formed at an opposite angle.

The outer surface of the stent 100 of the present invention may be formed with a synthetic resin film of PETT or silicon having affinity with the human body.

As shown in FIG. 8, when the procedure is completed, the stent 100 is inserted into two adjacent tissues, which are perforated and closely adjacent to each other by a conventional insertion device. When the procedure is completed, The supporting force and the fixing force at the procedure position are greatly improved by the resistance strengthening ring 16 provided on the outer periphery of the washer-shaped end portion 14 by being engaged with the procedure tissue layer 30 of the human body.

The stent 100 of the present invention is expanded so that the washer-shaped end portion 14 of a wide diameter is supported broadly in the tissue of the human body and the supported washer-shaped end portion 14 has a resistance- The ring 16 restricts the deformation such as shrinkage and strongly supports the external force, so that the external force acts on the washer-shaped end 14 to eliminate the problem of deformation.

When the stent 100 is gripped and removed by the insertion device to remove the stent 100, the multi-layered resistance-strengthening ring 16 is extended in the form of a fall tube while exiting the puncture site, and the contraction pressure is easily transmitted to prevent damage to the human body Removal is possible.

10, 100: stent 12: cylindrical body
14: washer-shaped end 16: resistance strengthening ring
20: Jig 22: Fixing pin
24: wire 26: disk
L: End distance

Claims (8)

A medical stent comprising a central cylindrical body of a stent and an expanded portion or flange larger than the diameter of the cylindrical body to connect the two adjacent tissue layers,
A single diameter stent 10 and.
A washer-shaped end portion 14 formed by outwardly bending at both longitudinal ends of the cylindrical body 12 of the stent,
The shape of the resistance strengthening ring 16 having a large resistance against the radial force applied from the outside of the stent so as to overlap with the outer periphery of the expanded washer-shaped end portion 14 is formed, Wherein the stent is configured to prevent the stent from coming off. The method according to claim 1,
Wherein the number of overlapping of the resistance strengthening rings (16) formed on the stent is such that the resistance of the ring can be increased or decreased by adjusting the stent end distance (L) extended and extended in the longitudinal direction of both sides of the cylindrical body (12) Resistant medical stents. The method according to claim 1,
Wherein the stent is adapted to change the diameter of the end portion in proportion to the diameter of the hollow portion of the stent (10) having a predetermined diameter. The method according to claim 1,
Characterized in that the washer-shaped end (14) is formed to form a support surface (14a) extending at right angles to the cylindrical body (12) so as to be caught in the tissue structure layer. The method according to claim 1,
Characterized in that said washer-shaped end (14) is formed to form a support surface (14a) extending obtuse at an obtuse angle in the cylindrical body (12) so as to be caught by the procedure tissue layer. The method according to claim 1,
Characterized in that said washer-shaped end (14) is formed to form a support surface (14a) extending at an acute angle in the cylindrical body (12) so as to be caught in the tissue tissue layer. The method according to any one of claims 4 to 6,
Wherein the stent is further formed with a synthetic film of either PETT or silicone. The method according to claim 1,
Wherein the stent (10) is made of a stent having a plurality of rhombic spaces (cells) by hooking a mountain bend part and a fractured bend part together to form a hook.
KR1020150096026A 2015-07-06 2015-07-06 Medical stent enhanced the resistance of the end portions KR20170005661A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018110737A1 (en) * 2016-12-15 2018-06-21 주식회사 비씨엠 Medical stent having resistance-reinforced end parts

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6620122B2 (en) 2001-04-26 2003-09-16 Scimed Life Systems, Inc. Gastric pseudocyst drainage and stent delivery system for use therein
US8454632B2 (en) 2008-05-12 2013-06-04 Xlumena, Inc. Tissue anchor for securing tissue layers
KR101311756B1 (en) 2011-07-06 2013-09-26 신경민 A Stent

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6620122B2 (en) 2001-04-26 2003-09-16 Scimed Life Systems, Inc. Gastric pseudocyst drainage and stent delivery system for use therein
US8454632B2 (en) 2008-05-12 2013-06-04 Xlumena, Inc. Tissue anchor for securing tissue layers
KR101311756B1 (en) 2011-07-06 2013-09-26 신경민 A Stent

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018110737A1 (en) * 2016-12-15 2018-06-21 주식회사 비씨엠 Medical stent having resistance-reinforced end parts

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