CN110617954B - External bending test device for fatigue performance of intravascular stent - Google Patents
External bending test device for fatigue performance of intravascular stent Download PDFInfo
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- CN110617954B CN110617954B CN201910994479.8A CN201910994479A CN110617954B CN 110617954 B CN110617954 B CN 110617954B CN 201910994479 A CN201910994479 A CN 201910994479A CN 110617954 B CN110617954 B CN 110617954B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Abstract
The invention relates to the technical field of intravascular stent testing, in particular to an extracorporeal bending testing device for fatigue performance of an intravascular stent, which comprises a fixed seat, wherein a connecting shaft is inserted in the fixed seat, the connecting shaft is driven by a motor to rotate, the extracorporeal bending testing device also comprises a supporting rod, the supporting rod vertically penetrates through the inside of a shaft body of the connecting shaft, one end of the supporting rod is fixed with a mounting plate, a first sleeve is fixed on the mounting plate, the outer end part of the first sleeve is provided with a first insertion hole, a second sleeve is fixed on the fixed seat, the outer end part of the second sleeve is provided with a second insertion hole, the first insertion hole and the second insertion hole are arranged at intervals, two ends of the intravascular stent are respectively inserted and fixed in the first insertion hole and the second insertion hole, the motor drives the supporting rod and the mounting plate to rotate through the connecting shaft.
Description
Technical Field
The invention relates to the technical field of intravascular stent testing, in particular to an intravascular stent fatigue performance in-vitro bending testing device.
Background
As early as 1912, the French doctor Alexis first proposed a method of restoring luminal permeability by supporting the vessel wall with a foreign body, who implanted paraffin-coated glass and metal tubes into the canine thoracic aorta. In 1964, Dotter et al continued the idea of Alexi, implanting a prosthetic device within the diseased vessel to restore the diameter of the vessel lumen; in the years, they have successively proposed various implant devices, such as self-expanding coil stents, etc., for treating vascular disorders of the narrowed type. Rousseau et al first implanted a flexible, self-expanding, stainless steel porous tube stent into the canine coronary. In 1977, Gruntzig succeeded for the first time in balloon stenting of coronary arteries, from which a era of stenting interventions for the treatment of cardiovascular diseases began.
Today's stents, whether flexible, supportive, compatible or durable, have been perfected because stents are not easily removed and some stents need to be installed in locations that require frequent bending. This places high demands on the flexural fatigue of the stent. Therefore, the bending fatigue test of the blood vessel stent is particularly important, and currently, a bending fatigue test device with simple structure and convenient operation is lacked.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the vascular stent fatigue performance in-vitro bending test device which is simple in structure and convenient to operate, and can be used for performing bending test on the vascular stent.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a vascular support fatigue performance external bending test device, which comprises a fixed base, the connecting axle alternates in the fixing base, the connecting axle passes through the motor and drives the realization rotation, still include the bracing piece, the bracing piece passes perpendicularly from the axle body inside of connecting axle, the one end fixed mounting panel of bracing piece, fixed first sleeve on the mounting panel, first outer tip of first sleeve is seted up first jack, fixed second sleeve on the fixing base, the second jack is seted up to the outer tip of second sleeve, first jack and second jack interval are arranged, the both ends of vascular support are installed respectively and are inserted and fix in first jack and second jack, the motor drives bracing piece and mounting panel through the connecting axle and rotates, thereby it is crooked to drive vascular support.
Fixed semicircle arc-shaped slide rail on the fixing base, the spout is seted up along the rail length direction to the slide rail, set up fixed orifices and fixed orifices on the tank bottom of spout and be more than two and along the interval arrangement of groove length direction, wherein place fixed minor axis in two fixed orifices, the stopper is established to the pole body upper cover of bracing piece, the screw rod is placed in the lateral surface middle part of stopper, the one end overhang of screw rod is outside, the other end of screw rod supports to lean on the suppression and forms locking on the bracing piece, it is fixed through threaded connection between screw rod and the stopper, be equipped with the projection on the medial surface of stopper, the bracing piece is arranged between two minor axes, when the bracing piece rotates, spacing slip is made along the groove length method of.
The fixing seat is in a hollow square tube shape, the connecting shaft vertically penetrates through two opposite tube walls of the fixing seat, the sliding rail is fixed on the outer surface of one tube wall, the second sleeve is fixed on the tube wall on the other side of the fixing seat, and the tube wall is perpendicular to the tube wall where the connecting shaft is located.
The utility model discloses a horizontal control device, including fixing base, slide rail, locating piece, horizontal control rod, connecting axle, locating piece, locating notch, the hole length direction of first jack, second jack is on same straight line and the pole length direction of this straight line and bracing piece is parallel, fixed locating piece on the pipe wall of fixing base, the pipe wall at locating piece place and the parallel relative arrangement of pipe wall at slide rail place, but free mobile formula interlude horizontal control rod in the locating piece, be equipped with the shaft shoulder on the connecting axle, the location breach is seted up to one side of shaft shoulder, when the one end of horizontal control rod is inserted in the location breach of shaft shoulder, horizontal control rod and bracing piece.
The spare sleeve is fixed through threaded connection mode all to first sleeve and second telescopic outer end, and the third jack is seted up to spare sleeve's inside, and the hole length direction of the third jack is on same straight line in the hole length direction of first jack and the spare sleeve that links to each other, and the hole length direction of the third jack is on same straight line in the hole length direction of second jack and the spare sleeve that links to each other.
The exterior of the blood vessel support is sleeved with a protective sleeve.
And a shaft body at one end of the connecting shaft is provided with a thread, the thread is matched with a nut, and the nut is screwed and pressed on the side surface of the supporting rod.
Has the advantages that: when this device uses, directly place the vascular support in first telescopic first jack, the telescopic second jack internal fixation of second, then the starter motor, the motor drives the connecting axle, bracing piece and mounting panel rotate, because first sleeve is fixed on the mounting panel, so the rotation of mounting panel can drive first sleeve and rotate, thereby drive the one end of vascular support and rotate, but because the other end of vascular support is placed and is fixed in the second sleeve, and the second sleeve is fixed and is kept motionless on the fixing base, so can cause the bending of vascular support, through the rotatory of two positive and negative directions of motor control connection axial, thereby it carries out the repeated bending test of equidirectional not to drive vascular support, whole structure is very simple, it is also comparatively convenient to operate, realize automatic test.
Drawings
FIG. 1 is a block diagram of the present invention;
fig. 2 is a structural view of another aspect of the present invention.
Detailed Description
The invention is further described below in conjunction with fig. 1-2.
The utility model provides an external crooked testing arrangement of vascular support fatigue performance, including fixing base 10, alternate connecting axle 20 in the fixing base 10, connecting axle 20 passes through the motor and drives the realization rotation, still include bracing piece 30, bracing piece 30 passes perpendicularly from the axle body inside of connecting axle 20, the one end fixed mounting panel 40 of bracing piece 30, fixed first sleeve 51 on the mounting panel 40, first jack is seted up to the outer tip of first sleeve 51, fixed second sleeve 52 on the fixing base 10, the second jack is seted up to the outer tip of second sleeve 52, first jack and second jack interval are arranged, the both ends of vascular support are installed respectively and are inserted and fix in first jack and second jack, the motor drives bracing piece 30 and mounting panel 40 through connecting axle 20 and rotates, thereby it is crooked to drive vascular support. When this device uses, directly place the vascular support in the first jack of first sleeve 51, the second jack internal fixation of second sleeve 52, then the starter motor, the motor drives connecting axle 20, bracing piece 30 and mounting panel 40 rotate, because first sleeve 51 is fixed on mounting panel 40, so mounting panel 40's rotation can drive first sleeve 51 and rotate, thereby drive the one end rotation of vascular support, but because the other end of vascular support is placed and is fixed in second sleeve 52, and second sleeve 52 fixes and keep motionless on fixing base 10, so can cause the bending of vascular support, it is rotatory to two positive and negative directions through motor control connecting axle 20, thereby drive vascular support and carry out the repeated crooked test of equidirectional not, whole structure is very simple, it is also comparatively convenient to operate, realize automatic test.
Preferably, the semicircular arc-shaped slide rail 60 is fixed on the fixing seat 10, the slide rail 60 is provided with a slide groove along the length direction of the slide groove, the groove bottom of the slide groove is provided with two or more fixing holes 61, the fixing holes are arranged at intervals along the length direction of the slide groove, the two fixing holes 61 are internally provided with the fixed short shafts 62, the body of the support rod 30 is sleeved with the limiting block 63, the middle part of the outer side surface of the limiting block 63 is internally provided with the screw rod 64, one end of the screw rod 64 is suspended and extended outwards, the other end of the screw rod 64 is abutted and pressed on the support rod 30 to form locking, the screw rod 64 and the limiting block 63 are fixedly connected through threads, the inner side surface of the limiting block 63 is provided with the convex column, the support rod 30 is arranged between the two short. The slide rails 60 limit the rotation of the support rod 30, and the two short shafts 62 limit the rotation range of the support rod 30.
Preferably, the fixing base 10 is in a hollow square tube shape, the connecting shaft 20 vertically penetrates through two opposite tube walls of the fixing base 10, the sliding rail 60 is fixed on the outer surface of one of the tube walls, and the second sleeve 52 is fixed on the other tube wall of the fixing base 10, and the tube wall is perpendicular to the tube wall where the connecting shaft 20 is located.
Further, fixed positioning block 65 on the pipe wall of fixing base 10, the pipe wall at positioning block 65 place and the pipe wall parallel relative arrangement at slide rail 60 place, but free mobile interlude horizontal control rod 66 in the positioning block 65, be equipped with the shaft shoulder on the connecting axle 20, the location breach is seted up to one side of shaft shoulder, when the one end of horizontal control rod 66 was inserted in the location breach of shaft shoulder, horizontal control rod 66 and bracing piece 30 were parallel and the two was in the horizontality, the hole long direction of first jack, second jack was on same straight line and this straight line was parallel with the pole long direction of bracing piece 30 this moment. When the intravascular stent is installed, one end of the horizontal control rod 66 is inserted into the positioning notch of the shaft shoulder, so that the first insertion hole of the first sleeve 51 and the second insertion hole of the second sleeve 52 are in the same straight line to facilitate the installation of the intravascular stent; after the vascular stent is installed, when the whole device needs to be started to start testing, one end of the horizontal control rod 66 is firstly pulled out from the positioning notch of the shaft shoulder, and the limiting is removed.
Furthermore, the outer ends of the first sleeve 51 and the second sleeve 52 are both fixed with a spare sleeve 53 in a threaded connection mode, a third jack is formed inside the spare sleeve 53, the hole length direction of the first jack and the hole length direction of the third jack in the connected spare sleeve 53 are on the same straight line, and the hole length direction of the second jack and the hole length direction of the third jack in the connected spare sleeve 53 are on the same straight line. Thus, the fixing of the vascular stents with different diameters and lengths can be realized.
In order to protect the stent during testing, the exterior of the stent is covered with a protective sheath 70. The protective sheath 70 may be made of a soft, elastic material so as to bend along with the stent.
In order to make the connection between the support rod 30 and the connecting shaft 20 more firm, a screw thread is formed on the shaft body at one end of the connecting shaft 20, a nut 80 is matched at the screw thread, and the nut 80 is screwed and pressed on the side surface of the support rod 30. The threads on the coupling shaft 20 are not shown in fig. 1, and the end of the threaded coupling shaft 20 refers to the end of the coupling shaft 20 that can be seen in fig. 1. When the nut 80 and the screw rod 64 are loosened, the support rod 30 can be moved left and right, so that the distance between the first sleeve 51 and the second sleeve 52 is adjusted, the intravascular stents with different lengths can be adapted, and after the adjustment is completed, the nut 80 and the screw rod 64 are directly screwed, so that the support rod 30 is fixed.
It should be understood that the above-described specific embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Obvious variations or modifications which are within the spirit of the invention are possible within the scope of the invention.
Claims (6)
1. The utility model provides a vascular support fatigue performance external bending testing arrangement which characterized in that: the blood vessel support comprises a fixed seat (10), a connecting shaft (20) is inserted into the fixed seat (10), the connecting shaft (20) is driven by a motor to rotate, the blood vessel support further comprises a supporting rod (30), the supporting rod (30) vertically penetrates through the inside of a shaft body of the connecting shaft (20), a mounting plate (40) is fixed at one end of the supporting rod (30), a first sleeve (51) is fixed on the mounting plate (40), a first insertion hole is formed in the outer end portion of the first sleeve (51), a second sleeve (52) is fixed on the fixed seat (10), a second insertion hole is formed in the outer end portion of the second sleeve (52), the first insertion hole and the second insertion hole are arranged at intervals, two ends of the blood vessel support are respectively inserted and fixed in the first insertion hole and the second insertion hole, the motor drives the supporting rod (30) and the mounting plate (40) to rotate through the connecting shaft (20), so that the blood, the sliding rail (60) is provided with a sliding groove along the rail length direction, the groove bottom of the sliding groove is provided with fixing holes (61) which are more than two and are arranged at intervals along the groove length direction, wherein fixed short shafts (62) are inserted into the two fixing holes (61), the rod body of the support rod (30) is sleeved with a limiting block (63), a screw rod (64) is inserted into the middle of the outer side face of the limiting block (63), one end of the screw rod (64) stretches outwards, the other end of the screw rod (64) abuts against and presses the support rod (30) to form locking, the screw rod (64) and the limiting block (63) are fixedly connected through threads, a convex column is arranged on the inner side face of the limiting block (63), the support rod (30) is arranged between the two short shafts (62), and when the support rod (30) rotates, the convex column on the limiting block (63).
2. The in vitro bending test device for fatigue performance of the blood vessel stent according to claim 1, wherein: the fixing seat (10) is in a hollow square tube shape, the connecting shaft (20) vertically penetrates through two opposite tube walls of the fixing seat (10), the sliding rail (60) is fixed on the outer surface of one tube wall, the second sleeve (52) is fixed on the tube wall of the other side of the fixing seat (10), and the tube wall is perpendicular to the tube wall where the connecting shaft (20) is located.
3. The in vitro bending test device for fatigue performance of the blood vessel stent according to claim 2, wherein: fixed locating piece (65) on the pipe wall of fixing base (10), the pipe wall at locating piece (65) place and the pipe wall parallel relative arrangement at slide rail (60) place, but free movement formula interlude horizontal control pole (66) in locating piece (65), be equipped with the shaft shoulder on connecting axle (20), the location breach is seted up to one side of shaft shoulder, when the one end of horizontal control pole (66) was inserted in the location breach of shaft shoulder, horizontal control pole (66) and bracing piece (30) are parallel and the two all is in the horizontality, first jack this moment, the hole length direction of second jack is on same straight line and the pole length direction of this straight line and bracing piece (30) is parallel.
4. The in vitro bending test device for fatigue performance of the blood vessel stent according to claim 3, wherein: the outer ends of the first sleeve (51) and the second sleeve (52) are fixedly provided with a spare sleeve (53) in a threaded connection mode, a third jack is formed in the spare sleeve (53), the hole length direction of the first jack and the hole length direction of the third jack in the spare sleeve (53) connected with the first jack are on the same straight line, and the hole length direction of the second jack and the hole length direction of the third jack in the spare sleeve (53) connected with the second jack are on the same straight line.
5. The in vitro bending test device for fatigue performance of the blood vessel stent according to claim 4, wherein: the exterior of the blood vessel stent is sleeved with a protective sleeve (70).
6. The in vitro bending test device for fatigue performance of the blood vessel stent according to claim 5, wherein: one end of the connecting shaft (20) is provided with a thread on the shaft body, the thread is matched with a nut (80), and the nut (80) is screwed and pressed on the side surface of the supporting rod (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910994479.8A CN110617954B (en) | 2019-10-18 | 2019-10-18 | External bending test device for fatigue performance of intravascular stent |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910994479.8A CN110617954B (en) | 2019-10-18 | 2019-10-18 | External bending test device for fatigue performance of intravascular stent |
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| CN110617954A CN110617954A (en) | 2019-12-27 |
| CN110617954B true CN110617954B (en) | 2021-04-13 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111289352B (en) * | 2020-03-27 | 2022-12-23 | 江苏理工学院 | Vascular stent twists reverse testing arrangement |
| CN112198053B (en) * | 2020-09-29 | 2022-11-01 | 江苏理工学院 | External loading device for blood vessel stent |
| CN112255128A (en) * | 2020-10-22 | 2021-01-22 | 江苏理工学院 | Vascular stent mechanics loading device |
| CN112485129A (en) * | 2020-11-19 | 2021-03-12 | 东莞市镁安医疗器械有限公司 | Vascular stent bending test device |
| CN116271425B (en) * | 2023-02-28 | 2023-09-26 | 河北康誉医疗器械有限公司 | High stability guide catheter device |
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Effective date of registration: 20230727 Address after: Rooms 2307 and 2308, Building A, Vitality Business Plaza, 185 Jumao Street, Yuanhe Street, Xiangcheng District, Suzhou City, Jiangsu Province, 215100 Patentee after: Suzhou Haixi Intelligent Medical Technology Co.,Ltd. Address before: 213001 No. 1801 Wu Cheng Road, Changzhou, Jiangsu Patentee before: JIANGSU University OF TECHNOLOGY |