CN118010336B - Bending and twisting performance testing device for vascular stent - Google Patents
Bending and twisting performance testing device for vascular stent Download PDFInfo
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- CN118010336B CN118010336B CN202410417228.4A CN202410417228A CN118010336B CN 118010336 B CN118010336 B CN 118010336B CN 202410417228 A CN202410417228 A CN 202410417228A CN 118010336 B CN118010336 B CN 118010336B
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- 230000002792 vascular Effects 0.000 title claims abstract description 52
- 238000005452 bending Methods 0.000 title claims abstract description 44
- 238000012360 testing method Methods 0.000 title claims abstract description 29
- 239000000758 substrate Substances 0.000 claims description 7
- 244000309464 bull Species 0.000 claims 2
- 125000003003 spiro group Chemical group 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 abstract description 6
- 210000004204 blood vessel Anatomy 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 11
- 210000003141 lower extremity Anatomy 0.000 description 8
- 210000001367 artery Anatomy 0.000 description 6
- 208000005764 Peripheral Arterial Disease Diseases 0.000 description 5
- 238000013001 point bending Methods 0.000 description 5
- 208000030831 Peripheral arterial occlusive disease Diseases 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000003137 popliteal artery Anatomy 0.000 description 2
- 206010060965 Arterial stenosis Diseases 0.000 description 1
- 208000000575 Arteriosclerosis Obliterans Diseases 0.000 description 1
- 206010057469 Vascular stenosis Diseases 0.000 description 1
- 230000033115 angiogenesis Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 210000003414 extremity Anatomy 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 208000037803 restenosis Diseases 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/14—Rotary-transmission dynamometers wherein the torque-transmitting element is other than a torsionally-flexible shaft
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/26—Investigating twisting or coiling properties
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The invention relates to a bending and twisting performance testing device for a vascular stent, belonging to the technical field of vascular stent testing; the device comprises a base plate, wherein a chute is arranged on the upper end surface of the base plate, a movable seat is arranged in the chute in a sliding manner, a fixed seat is rotationally arranged on the base plate on the right side of the movable seat, the fixed seat is identical to the movable seat in structure and is symmetrically arranged left and right, a laterally symmetrical acting sleeve and a gear rack mechanism for controlling the acting sleeve to rotate are arranged on the fixed seat and the movable seat, two pulleys are respectively arranged on the fixed seat and the movable seat, and the fixed seat and the movable seat are rotated by the force exerted on the pulleys by a stay wire; according to the displacement of the pull wire and the force applied on the pull wire, the angular displacement and the bending moment of the end part of the vascular stent can be obtained; the torque of the blood vessel stent can be calculated by the rotating angle of the acting sleeve and the force exerted on the rack; solves the problems of uneven stress and poor torsion performance of the combined stent when the current vascular stent is bent.
Description
Technical Field
The invention belongs to the technical field of vascular stent testing, and particularly relates to a bending and twisting performance testing device for a vascular stent.
Background
Currently peripheral arterial disease (PERIPHERAL ARTERIAL DISEASE, PAD) afflicts up to 20% of elderly patients, with PAD increasing to nearly 50% of older people over 85 years, with male morbidity being slightly higher than female, with lower limb arteriosclerotic occlusion (low arteriosclerosis obliterans, LASO) being the most common manifestation of peripheral arterial disease. At present, the interventional therapy has the advantages of small trauma, high safety, quick postoperative recovery, repeated operation and the like, and has become the most common treatment method in lower limb arterial stenosis diseases, namely, a stent is implanted in a lesion section to achieve the effect of supporting a vascular stenosis occlusion section, however, the patency rate is still worse than that of arteries of most other parts according to clinical data, and the patency rate is attributed to the fact that limbs undergo extensive mechanical deformation during movement, wherein the unique high dynamic mechanical environment comprises torsion, bending, compression and the like. Vascular stents generally require testing of their mechanical properties prior to clinical use. The lower limb artery can receive great bending and torsion force during movement, and researches show that the popliteal artery can be twisted by 2 degrees/mm-4 degrees/mm in the lower limb buckling process, and the popliteal artery can be twisted by 60 degrees +/-34 degrees. Therefore, the stent placed in the lower limb artery needs to be capable of adapting to the complex mechanical environments, has good bending property and torsion property, and meanwhile, the stent with good bending property can be better adapted to the deformation of angiogenesis, so that the risk of restenosis in the operation process and after the operation can be reduced to a great extent.
The conventional methods for testing the flexibility of the stent include a three-point bending method, a four-point bending method and an end torsion method, wherein the three-point bending method is to place the stent between two supporting points, apply a force in the middle to bend the stent, analyze the flexibility of the stent by testing the hardness of the stent, and in the loading mode, the middle position of the tested stent is subjected to the maximum load to generate larger deformation, possibly cause larger bending angle errors, and simultaneously, the longer stent is easy to generate uneven bending. The loading mode of end torsion is concentrated at the end, so that the bending distribution is uneven, and defects at certain parts of the bracket can not be displayed, thereby influencing the detection effect. The four-point bending test method is to place the support on two support points with a certain distance, apply load to the support on the same distance from the middle points of the two support points, and the support is subjected to four-point bending deformation under the action of four contact points. The three methods are difficult to avoid radial deformation of the bracket, and it is difficult to distinguish whether the bracket with bending deformation is generated by bending moment or radial load, so that the measured strength is not the strength under pure bending, and the bending moment cannot be uniformly loaded on the bracket. The torsion angle is applied to both ends of the stent mainly by conventional measurement for the torsional performance of the stent. At present, aiming at the unique mechanical environment of the lower limb artery, there is a device for jointly measuring the torsional property of the stent, so a novel device for testing the bending and twisting properties of the peripheral vascular stent needs to be designed.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides a bending and twisting performance testing device for a vascular stent; solves the problems of uneven stress and poor torsion performance of the combined stent when the current vascular stent is bent.
In order to achieve the above purpose, the present invention is realized by the following technical scheme.
The bending and twisting performance testing device for the vascular stent comprises a substrate, wherein a chute is formed in the upper end face of the substrate, a movable seat is slidably arranged in the chute, a fixed seat is rotatably arranged on the substrate on the right side of the movable seat, and the fixed seat and the movable seat are identical in structure and are symmetrically arranged left and right;
the fixed metering device comprises a fixed seat, a fixed pointer, a fixed dial, a fixed rack, a fixed rotating rod, a fixed metering sleeve, a fixed action sleeve, a fixed dial, a fixed rack and a fixed gear, wherein the fixed slot is formed in the middle of the fixed seat;
The middle of the movable seat is provided with a mounting groove, a first movable pulley and a second movable pulley are rotatably arranged in the mounting groove on the movable seat, a movable sleeve is fixedly arranged in the mounting groove on the movable seat, a movable rotating rod is rotatably arranged in the movable sleeve, one end of the movable sleeve, which is far away from the fixed seat, is fixedly provided with a movable metering sleeve, one end of the movable rotating rod, which faces the fixed seat, is provided with a movable acting sleeve, one end of the movable rotating rod, which is far away from the fixed seat, is provided with a movable gear, a movable pointer is fixedly arranged on the movable gear, one side end surface of the movable acting sleeve, which is far away from the fixed seat, is provided with a movable dial, a movable rack is inserted in the movable metering sleeve, and the movable rack is meshed with the movable gear;
the fixed action sleeve and the movable action sleeve are positioned on the same horizontal line in the left-right direction;
the stay wire is respectively contacted with the front ends of the first fixed pulley and the first movable pulley, and the two ends of the stay wire respectively bypass the rear sides of the second fixed pulley and the second movable pulley from the inner side to the outer side.
Further, the chute is of an inverted T-shaped structure, and the chute is horizontally arranged along the left-right direction.
Further, a fixed base is fixedly arranged on the lower end face of the fixed seat, a vertical step groove is formed in the substrate below the fixed seat and located on the right extension line of the sliding groove, and the fixed base is rotatably arranged inside the step groove.
Further, the axes of the first fixed pulley and the second fixed pulley are all vertically arranged, wherein the axis of the first fixed pulley is coincided with the axis of the fixed base, the second fixed pulley is positioned at the right rear of the first fixed pulley, and an included angle of 45 degrees is kept between a horizontal connecting line between the axis of the first fixed pulley and the axis of the second fixed pulley and a horizontal line in the left-right direction.
Further, the movable base is arranged on the lower end face of the movable base in a movable mode, the movable base is of a vertically arranged stepped shaft structure, the movable base is arranged inside the sliding groove, the movable base slides along the sliding groove through the movable base, and meanwhile the movable base can rotate around the movable base.
Further, the axes of the first movable pulley and the second movable pulley are vertically arranged, wherein the axis of the first movable pulley is coincided with the axis of the movable base, the second movable pulley is positioned at the left rear part of the first movable pulley, and an included angle of 45 degrees is kept between a horizontal connecting line between the axis of the first movable pulley and the axis of the second movable pulley and a horizontal line in the left-right direction;
The first fixed pulley and the first movable pulley are positioned on the same horizontal line in the left-right direction. The second fixed pulley and the second movable pulley are on the same horizontal line in the left-right direction.
Further, the fixed sleeve is located between the first fixed pulley and the second fixed pulley, the movable sleeve is located between the first movable pulley and the second movable pulley, the fixed sleeve and the movable sleeve are horizontally arranged along the left-right direction, and the fixed metering sleeve and the movable metering sleeve are horizontally arranged along the left-right direction.
Further, the end face of one side of the fixed gear, which is far away from the fixed rotating rod, is flush with the right end face of the fixed metering sleeve, a fixed pointer is fixedly arranged on the end face of one side of the fixed gear, which is far away from the fixed rotating rod, and the tip end of the fixed pointer faces the fixed dial; the end face of one side of the movable gear, which is far away from the movable rotating rod, is flush with the left end face of the movable metering sleeve, a movable pointer is movably arranged on the end face of one side of the movable gear, which is far away from the movable rotating rod, and the tip end of the movable pointer faces the movable dial.
Further, a fixed screw is fixedly arranged at one end of the fixed rotating rod, which faces the movable seat, the fixed screw and the fixed rotating rod are coaxially arranged, and the fixed action sleeve is in threaded connection with the outer side of the fixed screw; the movable screw is fixedly arranged at one end of the movable rotating rod, which faces the fixed seat, and the movable screw and the movable rotating rod are coaxially arranged, and the movable action sleeve is in threaded connection with the outer side of the movable screw.
Furthermore, hemispherical anti-slip bulges are uniformly distributed on the outer side surfaces of the movable action sleeve and the fixed action sleeve.
Compared with the prior art, the invention has the following beneficial effects:
The bending and twisting performance testing device for the vascular stent provided by the invention not only can independently measure the bending performance and the twisting performance of the stent, but also can apply bending and twisting dual acting forces to the stent simultaneously, can better measure the mechanical properties of the stent applied to the specific part of the lower limb artery, and provides data support for the design and clinical use of the lower limb artery stent.
Drawings
The invention is described in further detail below with reference to the accompanying drawings:
FIG. 1 is a schematic perspective view of the overall invention;
FIG. 2 is a front elevational view of the entirety of the present invention;
FIG. 3 is a side view of the entirety of the present invention;
FIG. 4 is a top view of the entirety of the present invention;
FIG. 5 is a schematic perspective view of a first fixing base;
FIG. 6 is a second perspective view of the holder;
FIG. 7 is a front view of the holder;
FIG. 8 is a top view of the holder;
FIG. 9 is a schematic perspective view of a mobile seat;
FIG. 10 is a second perspective view of the mobile seat;
FIG. 11 is a front view of the mobile seat;
FIG. 12 is a top view of the mobile station;
FIG. 13 is a side view of the mobile seat;
FIG. 14 is a schematic representation of the present invention in comparison to the prior art prior to and subsequent to bending moment testing of a stent;
FIG. 15 is a schematic illustration of the present invention when a torque test is performed on a vascular stent;
Wherein 1 is a base plate, 2 is a chute, 3 is a movable seat, 4 is a fixed seat, 5 is a fixed base, 6 is a first fixed pulley, 7 is a second fixed pulley, 8 is a fixed sleeve, 9 is a fixed metering sleeve, 10 is a fixed dial, 11 is a fixed action sleeve, 12 is a fixed gear, 13 is a fixed rack, 14 is a fixed pointer, 15 is a movable base, 16 is a first movable pulley, 17 is a second movable pulley, 18 is a movable sleeve, 19 is a movable metering sleeve, 20 is a movable dial, 21 is a movable action sleeve, 22 is a movable gear, 23 is a movable rack, 24 is a movable pointer, 25 is a pull wire, and 26 is a vascular stent.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail by combining the embodiments and the drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. The following describes the technical scheme of the present invention in detail with reference to examples and drawings, but the scope of protection is not limited thereto.
As shown in fig. 1-13, the invention provides a bending performance testing device for a vascular stent, which comprises a base plate 1, a movable seat 3, a fixed seat 4 and a stay wire 25.
The base plate 1 is of a square plate-shaped structure which is horizontally arranged, a chute 2 is arranged on the upper end face of the base plate 1, the chute 2 is of an inverted T-shaped structure, and the chute 2 is horizontally arranged along the left-right direction.
The fixed seat 4 and the movable seat 3 have the same structure, and the fixed seat 4 and the movable seat 3 are arranged in bilateral symmetry.
The fixed seat 4 is arranged on the right side of the chute 2, and the fixed seat 4 is provided with a fixed base 5, a first fixed pulley 6, a second fixed pulley 7, a fixed sleeve 8, a fixed rotating rod, a fixed screw, a fixed action sleeve 11, a fixed metering sleeve 9, a fixed dial 10, a fixed pointer 14, a fixed gear 12 and a fixed rack 13.
The fixing seat 4 is of a block structure, a fixing base 5 is fixedly arranged at the lower end face of the fixing seat 4, the fixing base 5 is of a vertically arranged stepped shaft structure, the stepped shaft structure comprises a large-diameter section at the lower side and a small-diameter section at the upper side, and the upper end of the small-diameter section is fixedly connected with the lower end face of the fixing seat 4. Be provided with a vertical ladder groove on base plate 1 of fixing base 4 below, the ladder groove is located the right side extension line of spout 2, unable adjustment base 5 rotates to set up in the ladder inslot portion, makes fixing base 4 can the horizontal rotation through unable adjustment base 5.
The middle part of the fixing seat 4 is provided with a mounting groove, and the mounting groove on the fixing seat 4 is communicated with the front side surface, the rear side surface and the right side surface of the fixing seat 4. The installation groove inside rotation at fixing base 4 is provided with first fixed slider and the fixed pulley 7 of second, and the axis of first fixed pulley 6 and the fixed pulley 7 of second is all vertical to be set up, and wherein the axis of first fixed pulley 6 coincides with the axis of unable adjustment base 5, and the fixed pulley 7 of second is located the right rear of first fixed pulley 6, and the horizontal line between the fixed pulley 6 axis of first and the fixed pulley 7 axis of second keeps 45 contained angles with the horizontal line of left and right directions.
The fixed sleeve 8 that is provided with in the mounting groove department of fixing base 4 is fixed, fixed sleeve 8 is located between first fixed pulley 6 and the fixed pulley 7 of second, and fixed sleeve 8 sets up along controlling the direction level, and fixed sleeve 8 is both ends open-ended cylindric structure, and fixed sleeve 8's left end opening is linked together with fixing base 4's left side terminal surface, and fixed sleeve 8's right-hand member opening extends to fixing base 4's right-hand member face outside.
The fixed metering sleeve 9 is fixedly arranged at the opening at the right end of the fixed sleeve 8, the axis of the fixed metering sleeve 9 is horizontally arranged along the left and right sides, and the fixed metering sleeve 9 is of a cylindrical structure with two open ends. The side wall of the fixed metering sleeve 9 is provided with an action window with the front end and the rear end communicated. A ring of fixed dial 10 is provided on the right end face of the fixed metering sleeve 9.
A fixed rotating rod is rotatably arranged in the fixed sleeve 8, the left end of the fixed rotating rod extends out of the left end opening of the fixed sleeve 8, a fixed screw is fixedly arranged at the left end of the fixed rotating rod, and the fixed screw and the fixed rotating rod are coaxially arranged; the right end of the fixed rotating rod stretches into the fixed metering sleeve 9, a fixed gear 12 is fixedly arranged at the right end of the fixed rotating rod, and the fixed gear 12 is positioned in the fixed metering sleeve 9. The end face of one side of the fixed gear 12 far away from the fixed rotating rod is flush with the right end face of the fixed metering sleeve 9, a fixed pointer 14 is fixedly arranged on the end face of one side of the fixed gear 12 far away from the fixed rotating rod, and the tip end of the fixed pointer 14 faces the fixed dial 10.
A fixed rack 13 is inserted in the action window of the fixed metering sleeve 9, and the fixed rack 13 is meshed with the fixed gear 12.
The outer side of the fixing screw is connected with a fixing sleeve 11 in a threaded manner, and hemispherical anti-slip bulges are uniformly distributed on the outer side surface of the fixing sleeve 11.
The movable seat 3 is slidably disposed in the chute 2, and the movable seat 3 is provided with a movable base 15, a first movable pulley 16, a second movable pulley 17, a movable sleeve 18, a movable rotating rod, a movable screw, a movable action sleeve 21, a movable metering sleeve 19, a movable dial 20, a movable pointer 24, a movable gear 22, and a movable rack 23.
The movable seat 3 is of a block structure, a movable base 15 is movably arranged at the lower end face of the movable seat 3, the movable base 15 is of a vertically arranged stepped shaft structure, and comprises a large-diameter section at the lower side and a small-diameter section at the upper side, and the upper end of the small-diameter section is movably connected with the lower end face of the movable seat 3. The movable base 15 is disposed inside the chute 2, and the movable base 3 slides along the chute 2 through the movable base 15, and the movable base 3 can also rotate around the movable base 15.
The middle of the movable seat 3 is provided with a mounting groove, and the mounting groove of the movable seat 3 is communicated with the front side surface, the rear side surface and the left side surface of the movable seat 3. The first movable sliding block and the second movable sliding block 17 are rotatably arranged in the mounting groove of the movable seat 3, the axes of the first movable sliding block 16 and the second movable sliding block 17 are vertically arranged, the axis of the first movable sliding block 16 coincides with the axis of the movable base 15, the second movable sliding block 17 is positioned at the left rear of the first movable sliding block 16, and an included angle of 45 degrees is kept between a horizontal connecting line between the axis of the first movable sliding block 16 and the axis of the second movable sliding block 17 and a horizontal line in the left-right direction.
The first fixed sheave 6 and the first movable sheave 16 are positioned on the same horizontal line in the left-right direction. The second fixed sheave 7 is on the same horizontal line in the left-right direction as the second movable sheave 17.
The fixed action sleeve 11 and the movable action sleeve 21 are positioned on the same horizontal line in the left-right direction, a movable sleeve 18 is movably arranged at the mounting groove of the movable seat 3, the movable sleeve 18 is positioned between the first movable pulley 16 and the second movable pulley 17, the movable sleeve 18 is horizontally arranged in the left-right direction, the movable sleeve 18 is of a cylindrical structure with two open ends, the right end opening of the movable sleeve 18 is communicated with the right end face of the movable seat 3, and the left end opening of the movable sleeve 18 extends to the outer side of the left end face of the movable seat 3.
A movable metering sleeve 19 is movably provided at the left end opening of the movable sleeve 18, the axis of the movable metering sleeve 19 is horizontally provided along the left and right sides, and the movable metering sleeve 19 has a cylindrical structure with two open ends. An action window with front and rear ends communicated is arranged on the side wall of the movable metering sleeve 19. A circle of moving dial 20 is provided on the left end face of the moving metering sleeve 19.
A movable rotating rod is rotatably arranged in the movable sleeve 18, the right end of the movable rotating rod extends out of the opening at the right end of the movable sleeve 18, a movable screw is movably arranged at the right end of the movable rotating rod, and the movable screw and the movable rotating rod are coaxially arranged; the left end of the moving rotary rod stretches into the moving metering sleeve 19, a moving gear 22 is arranged at the left end of the moving rotary rod in a moving mode, and the moving gear 22 is located in the moving metering sleeve 19. The end face of the side of the moving gear 22 away from the moving rotating rod is flush with the left end face of the moving metering sleeve 19, a moving pointer 24 is movably arranged on the end face of the side of the moving gear 22 away from the moving rotating rod, and the tip end of the moving pointer 24 faces the moving dial 20.
A movable rack 23 is inserted into the action window of the movable metering sleeve 19, and the movable rack 23 is meshed with the movable gear 22.
The outside of the movable screw is connected with a movable sleeve 21 in a threaded manner, and hemispherical anti-slip bulges are uniformly distributed on the outer side surface of the movable sleeve 21.
The fixed action sleeve 11 and the movable action sleeve 21 are positioned on the same horizontal line in the left-right direction.
The pull wire 25 is positioned in the horizontal plane, the pull wire 25 is respectively contacted with the front ends of the first fixed pulley 6 and the first movable pulley 16, the two ends of the pull wire 25 respectively bypass the rear sides of the second fixed pulley 7 and the second movable pulley 17 from the inner side to the outer side, the left end of the pull wire 25 is fixed, and the right end of the pull wire 25 is horizontally pulled to the right.
As shown in fig. 14, a bending performance test device for a stent, a method of using in testing bending moments of a stent 26, comprises the steps of,
The first step: the model of the fixing action sleeve 11 and the moving action sleeve 21 corresponding to the vascular stent 26 is selected according to the model of the vascular stent 26, the fixing action sleeve 11 is screwed on the outer side of the fixing screw, the moving action sleeve 21 is screwed on the outer side of the moving screw, and two ends of the vascular stent 26 are respectively inserted on the outer sides of the fixing action sleeve 11 and the moving action sleeve 21.
And a second step of: the pull wire 25 is respectively contacted with the front ends of the first fixed pulley 6 and the first movable pulley 16, both ends of the pull wire 25 respectively bypass the rear sides of the second fixed pulley 7 and the second movable pulley 17 from the inner side to the outer side, the left end of the pull wire 25 is fixed, and the right end of the pull wire 25 is pulled horizontally to the right.
And a third step of: after the second fixed pulley 7 is acted by the tension force of the stay wire 25, the second fixed pulley 7 rotates forwards around the first fixed pulley 6 by a certain angle, and the second fixed pulley 7 drives the fixed seat 4 to synchronously rotate; after the second movable pulley 17 receives the tensile force of the pull wire 25, the second movable pulley 17 rotates forwards around the first movable pulley 16 by a certain angle, and the second movable pulley 17 drives the movable seat 3 to synchronously rotate. The fixed seat 4 rotates by the same angle as the movable seat 3.
Fourth step: because the fixed seat 4 and the movable seat 3 rotate forwards by the same angle, the fixed seat 4 and the movable seat 3 drive the vascular stent 26 to start bending deformation, the bending moment of the vascular stent 26 can be calculated through the constant force and moment applied on the stay wire 25, and the angular displacement of the vascular stent 26 can also be obtained through stretching displacement.
As shown in fig. 15, a bending performance test device for a stent, a method of using in testing the torque of a stent 26, comprises the steps of,
The first step: the model of the fixing action sleeve 11 and the moving action sleeve 21 corresponding to the vascular stent 26 is selected according to the model of the vascular stent 26, the fixing action sleeve 11 is screwed on the outer side of the fixing screw, the moving action sleeve 21 is screwed on the outer side of the moving screw, and two ends of the vascular stent 26 are respectively inserted on the outer sides of the fixing action sleeve 11 and the moving action sleeve 21.
And a second step of: the movable rack 23 is pulled forward, the fixed rack 13 is pulled backward, and both the movable rack 23 and the fixed rack 13 are pulled with the same constant pulling force.
And a third step of: the movable rack 23 drives the movable gear 22 to rotate clockwise, the movable gear 22 drives the movable action sleeve 21 to rotate clockwise through the movable rotating rod, and the movable action sleeve 21 drives the left end of the vascular stent 26 to rotate clockwise; the fixed rack 13 drives the fixed gear 12 to rotate anticlockwise, the fixed gear 12 drives the fixed action sleeve 11 to rotate anticlockwise through the fixed rotating rod, and the fixed action sleeve 11 drives the right end of the intravascular stent 26 to rotate anticlockwise.
Fourth step: the two ends of the vascular stent 26 reversely rotate with the same force, so that the vascular stent 26 is twisted, the twisting angle of the left end of the vascular stent 26 can be obtained by moving the pointer 24 to the movable dial 20, and the twisting angle of the right end of the vascular stent 26 can be obtained by the fixed pointer 14 to the fixed dial 10. The torque of the blood vessel stent 26 can be determined by a constant pulling force applied to the moving rack 23 and the fixed rack 13.
A bending and twisting performance testing device for a vascular stent and a use method for measuring bending moment and torque of the vascular stent 26 simultaneously comprise the following steps,
The first step: the model of the fixing action sleeve 11 and the moving action sleeve 21 corresponding to the vascular stent 26 is selected according to the model of the vascular stent 26, the fixing action sleeve 11 is screwed on the outer side of the fixing screw, the moving action sleeve 21 is screwed on the outer side of the moving screw, and two ends of the vascular stent 26 are respectively inserted on the outer sides of the fixing action sleeve 11 and the moving action sleeve 21.
And a second step of: the pull wire 25 is respectively contacted with the front ends of the first fixed pulley 6 and the first movable pulley 16, both ends of the pull wire 25 respectively bypass the rear sides of the second fixed pulley 7 and the second movable pulley 17 from the inner side to the outer side, the left end of the pull wire 25 is fixed, and the right end of the pull wire 25 is pulled horizontally to the right.
And a third step of: simultaneously, the movable rack 23 is pulled forwards, the fixed rack 13 is pulled backwards, and the movable rack 23 and the fixed rack 13 are pulled with the same constant pulling force.
Fourth step: the fixed seat 4 and the movable seat 3 drive the vascular stent 26 to start bending deformation, and simultaneously, the two ends of the vascular stent 26 reversely rotate with the same force, so that the vascular stent 26 is twisted.
Fifth step: the bending moment of the stent 26 can be calculated by a constant force and moment applied to the pull wire 25, and the angular displacement of the stent 26 can also be determined by the tensile displacement. The left end of the stent 26 is twisted by moving the pointer 24 to the moving dial 20 and the right end of the stent 26 is twisted by the fixed pointer 14 to the fixed dial 10. The torque of the blood vessel stent 26 can be determined by a constant pulling force applied to the moving rack 23 and the fixed rack 13.
Hemispherical anti-slip protrusions are uniformly distributed on the outer side surfaces of the movable action sleeve 21 and the fixed action sleeve 11, so that the vascular stent 26 can be ensured not to rotate relative to the movable action sleeve 21 and the fixed action sleeve 11 when being twisted.
By sliding the movable base 15 inside the chute 2, the left and right positions of the movable seat 3 can be adjusted, so that the distance between the movable action sleeve 21 and the fixed action sleeve 11 can be adjusted, and the device can perform bending moment and torque performance tests on vascular stents 26 with different lengths.
By changing the fixed action sleeve 11 and moving the action sleeve 21, bending moment and torque performance tests can be performed on different types of vascular stents 26.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. A turn round capability test device for vascular support, its characterized in that: the device comprises a substrate (1), wherein a chute (2) is arranged on the upper end surface of the substrate (1), a movable seat (3) is slidably arranged in the chute (2), a fixed seat (4) is rotatably arranged on the substrate (1) on the right side of the movable seat (3), and the fixed seat (4) and the movable seat (3) have the same structure and are symmetrically arranged left and right;
A mounting groove is formed in the middle of the fixing seat (4), a first fixed pulley (6) and a second fixed pulley (7) are rotatably arranged in the mounting groove on the fixing seat (4), a fixed sleeve (8) is fixedly arranged in the mounting groove on the fixing seat (4), a fixed rotating rod is rotatably arranged in the fixed sleeve (8), a fixed metering sleeve (9) is fixedly arranged at one end, far away from the movable seat (3), of the fixed sleeve (8), a fixed action sleeve (11) is arranged at one end, far away from the movable seat (3), of the fixed rotating rod, a fixed gear (12) is arranged at one end, far away from the movable seat (3), of the fixed rotating rod, a fixed pointer (14) is fixedly arranged on one end face, far away from the movable seat (3), of the fixed action sleeve (11), a fixed dial (10) is arranged on the end face, and a fixed rack (13) is inserted in the fixed metering sleeve (9), and is meshed with the fixed gear (12);
A mounting groove is formed in the middle of the movable seat (3), a first movable pulley (16) and a second movable pulley (17) are rotatably arranged in the mounting groove in the movable seat (3), a movable sleeve (18) is fixedly arranged in the mounting groove in the movable seat (3), a movable rotating rod is rotatably arranged in the movable sleeve (18), a movable metering sleeve (19) is fixedly arranged at one end, far away from the fixed seat (4), of the movable sleeve (18), a movable acting sleeve (21) is arranged at one end, far away from the fixed seat (4), of the movable rotating rod, a movable gear (22) is arranged at one end, far away from the fixed seat (4), of the movable rotating rod, a movable pointer (24) is fixedly arranged on the movable gear (22), a movable dial (20) is arranged on one side end face, far away from the fixed seat (4), of the movable acting sleeve (21), a movable rack (23) is inserted in the movable metering sleeve (19), and the movable rack (23) is meshed with the movable gear (22).
The fixed action sleeve (11) and the movable action sleeve (21) are positioned on the same horizontal line in the left-right direction;
The stay wire (25) is respectively contacted with the front ends of the first fixed pulley (6) and the first movable pulley (16), and both ends of the stay wire (25) respectively bypass the rear sides of the second fixed pulley (7) and the second movable pulley (17) from the inner side to the outer side.
2. A bending performance testing apparatus for a vascular stent according to claim 1, wherein: the chute (2) is of an inverted T-shaped structure, and the chute (2) is horizontally arranged along the left-right direction.
3. A bending performance testing apparatus for a vascular stent according to claim 1, wherein: the fixing base is characterized in that a fixing base (5) is fixedly arranged on the lower end face of the fixing base (4), a vertical step groove is formed in the base plate (1) below the fixing base (4), the step groove is located on the right side extension line of the sliding groove (2), and the fixing base (5) is rotatably arranged inside the step groove.
4. A bending performance testing apparatus for a vascular stent according to claim 3, wherein: the axes of the first fixed pulley (6) and the second fixed pulley (7) are vertically arranged, wherein the axis of the first fixed pulley (6) coincides with the axis of the fixed base (5), the second fixed pulley (7) is positioned at the right rear of the first fixed pulley (6), and an included angle of 45 degrees is kept between a horizontal connecting line between the axis of the first fixed pulley (6) and the axis of the second fixed pulley (7) and a horizontal line in the left-right direction.
5. The bending performance testing apparatus for a vascular stent of claim 4, wherein: the movable base (15) is arranged on the lower end face of the movable base (3) in a movable mode, the movable base (15) is of a vertically arranged stepped shaft structure, the movable base (15) is arranged inside the sliding groove (2), the movable base (3) slides along the sliding groove (2) through the movable base (15), and meanwhile the movable base (3) can rotate around the movable base (15).
6. The bending performance testing apparatus for a vascular stent of claim 5, wherein: the axes of the first movable pulley (16) and the second movable pulley (17) are vertically arranged, wherein the axis of the first movable pulley (16) is coincident with the axis of the movable base (15), the second movable pulley (17) is positioned at the left rear part of the first movable pulley (16), and an included angle of 45 degrees is kept between a horizontal connecting line between the axis of the first movable pulley (16) and the axis of the second movable pulley (17) and a horizontal line in the left-right direction;
The first fixed pulley (6) and the first movable pulley (16) are positioned on the same horizontal line in the left-right direction;
The second fixed pulley (7) and the second movable pulley (17) are on the same horizontal line in the left-right direction.
7. A bending performance testing apparatus for a vascular stent according to claim 1, wherein: the fixed sleeve (8) is located between the first fixed pulley (6) and the second fixed pulley (7), the movable sleeve (18) is located between the first movable pulley (16) and the second movable pulley (17), the fixed sleeve (8) and the movable sleeve (18) are horizontally arranged along the left-right direction, and the fixed metering sleeve (9) and the movable metering sleeve (19) are horizontally arranged along the left-right direction.
8. The bending performance testing apparatus for a vascular stent of claim 7, wherein: the end face of one side of the fixed gear (12) far away from the fixed rotating rod is flush with the right end face of the fixed metering sleeve (9), a fixed pointer (14) is fixedly arranged on the end face of one side of the fixed gear (12) far away from the fixed rotating rod, and the tip of the fixed pointer (14) faces the fixed dial (10); the end face of one side of the moving gear (22) far away from the moving rotating rod is flush with the left end face of the moving metering sleeve (19), a moving pointer (24) is movably arranged on the end face of one side of the moving gear (22) far away from the moving rotating rod, and the tip end of the moving pointer (24) faces the moving dial (20).
9. A bending performance testing apparatus for a vascular stent according to claim 1, wherein: a fixed screw is fixedly arranged at one end of the fixed rotating rod, which faces the movable seat (3), the fixed screw and the fixed rotating rod are coaxially arranged, and a fixed action sleeve (11) is in threaded connection with the outer side of the fixed screw; the one end towards fixing base (4) of removal bull stick is fixed to be provided with the removal screw, removes screw and the coaxial setting of removal bull stick, removes action sleeve (21) spiro union in the outside of removing the screw.
10. A bending performance testing apparatus for a vascular stent according to claim 1, wherein: hemispherical anti-slip bulges are uniformly distributed on the outer side surface of the movable acting sleeve (21) and the fixed acting sleeve (11).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410417228.4A CN118010336B (en) | 2024-04-09 | 2024-04-09 | Bending and twisting performance testing device for vascular stent |
| ZA2024/02811A ZA202402811B (en) | 2024-04-09 | 2024-04-11 | A bending and torsion properties test device for vascular stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410417228.4A CN118010336B (en) | 2024-04-09 | 2024-04-09 | Bending and twisting performance testing device for vascular stent |
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| Publication Number | Publication Date |
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| CN118010336A CN118010336A (en) | 2024-05-10 |
| CN118010336B true CN118010336B (en) | 2024-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410417228.4A Active CN118010336B (en) | 2024-04-09 | 2024-04-09 | Bending and twisting performance testing device for vascular stent |
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| Country | Link |
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| CN (1) | CN118010336B (en) |
| ZA (1) | ZA202402811B (en) |
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| US4656872A (en) * | 1986-04-14 | 1987-04-14 | Fischer Glenn N | Wrap-around bend test method and apparatus |
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| CN112255128A (en) * | 2020-10-22 | 2021-01-22 | 江苏理工学院 | Vascular stent mechanics loading device |
| CN114942195A (en) * | 2022-06-24 | 2022-08-26 | 太原理工大学 | Device for measuring torsion force of artificial blood vessel/stent and use method thereof |
| CN115200852A (en) * | 2022-08-08 | 2022-10-18 | 北京理工大学 | Experimental device for be used for intravascular stent axial durability test |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2184035B1 (en) * | 2007-09-07 | 2019-10-16 | Waseda University | Endurance test apparatus for medical instrument and endurance test method |
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2024
- 2024-04-09 CN CN202410417228.4A patent/CN118010336B/en active Active
- 2024-04-11 ZA ZA2024/02811A patent/ZA202402811B/en unknown
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| US4656872A (en) * | 1986-04-14 | 1987-04-14 | Fischer Glenn N | Wrap-around bend test method and apparatus |
| CN105466792A (en) * | 2016-01-26 | 2016-04-06 | 大连理工大学 | Movable ocean engineering flexible pipe cable torsion test device |
| CN111289352A (en) * | 2020-03-27 | 2020-06-16 | 江苏理工学院 | Vascular stent twists reverse testing arrangement |
| CN112255129A (en) * | 2020-10-22 | 2021-01-22 | 江苏理工学院 | External torsion loading device for intravascular stent |
| CN112255128A (en) * | 2020-10-22 | 2021-01-22 | 江苏理工学院 | Vascular stent mechanics loading device |
| CN114942195A (en) * | 2022-06-24 | 2022-08-26 | 太原理工大学 | Device for measuring torsion force of artificial blood vessel/stent and use method thereof |
| CN115200852A (en) * | 2022-08-08 | 2022-10-18 | 北京理工大学 | Experimental device for be used for intravascular stent axial durability test |
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| Publication number | Publication date |
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| CN118010336A (en) | 2024-05-10 |
| ZA202402811B (en) | 2024-09-25 |
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