CN110617955A - External testing device for fatigue performance of blood vessel support - Google Patents
External testing device for fatigue performance of blood vessel support Download PDFInfo
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- CN110617955A CN110617955A CN201910994500.4A CN201910994500A CN110617955A CN 110617955 A CN110617955 A CN 110617955A CN 201910994500 A CN201910994500 A CN 201910994500A CN 110617955 A CN110617955 A CN 110617955A
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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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Abstract
The invention relates to the technical field of blood vessel stent testing, in particular to an in vitro testing device for fatigue performance of a blood vessel stent, which comprises a base, wherein a supporting frame is arranged on the base, a diameter-expanding mechanism is detachably fixed on the supporting frame, the diameter-expanding mechanism comprises a fixed shaft, a slide block and a support rod unit, the support rod unit comprises a first support rod, a second support rod and a working rod, the working rod is respectively hinged with the first support rod and the second support rod, the first support rod is hinged with the fixed shaft, the second support rod is hinged with the slide block, the support rod unit comprises more than two support rods and is arranged around the fixed shaft at intervals in the circumferential direction, the slide block is sleeved on the fixed shaft, two ends of the fixed shaft are detachably fixed on the supporting frame, a motor drives the slide block to reciprocate along the axial direction of the fixed shaft through a crank connecting rod mechanism to, the moving energy of the sliding block drives the working rod to stretch and retract so as to realize reciprocating expansion of the intravascular stent, and the whole device has a simple structure and is convenient to operate.
Description
Technical Field
The invention relates to the technical field of intravascular stent testing, in particular to an intravascular stent fatigue performance in-vitro testing device.
Background
Clinically, atherosclerosis is treated by means of interventional blood vessel stent, and now the technology is continuously developed, and the requirement of the blood vessel stent is increased. The interventional blood vessel stent treatment method is very effective, but problems of restenosis, thrombus and the like in blood vessels still occur after the operation. These are closely related to the mechanical properties of the vascular stent.
When the blood vessel stent is used, the blood vessel stent is in a contraction state firstly and is expanded after entering a lesion area. In the prior art, a testing device with simple structure and convenient operation is not used for testing the fatigue resistance of the intravascular stent.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the in-vitro testing device for the fatigue performance of the vascular stent, which has a simple structure and is convenient to operate, so that the fatigue test can be effectively carried out on the vascular stent.
The technical scheme adopted by the invention for solving the technical problems is as follows: an in vitro testing device for fatigue performance of a vascular stent comprises a base, wherein a supporting frame is arranged on the base, a diameter supporting mechanism is detachably fixed on the supporting frame and comprises a fixed shaft, a sliding block and a supporting rod unit, the supporting rod unit comprises a first supporting rod, a second supporting rod and a working rod, one end of the first supporting rod is hinged on the fixed shaft, the other end of the first supporting rod stretches outwards, one end of the second supporting rod is hinged on the sliding block, the other end of the second supporting rod stretches outwards, the other end of the first supporting rod and the other end of the second supporting rod are close to each other, two ends of the working rod are respectively hinged with the other end of the first supporting rod and the other end of the second supporting rod, the rod length direction of the working rod is parallel to the axial length direction of the fixed shaft, the supporting rod units are more than two and are arranged at intervals around the circumferential direction of the fixed shaft, the vascular stent is sleeved outside an annular supporting, the sliding block is sleeved on the fixed shaft, two ends of the fixed shaft are detachably fixed on the supporting frame, the supporting frame is fixedly provided with the motor, and the motor drives the sliding block to reciprocate along the axial direction of the fixed shaft through the crank connecting rod mechanism so as to drive the annular supporting part to do radial telescopic motion.
The support frame comprises a first vertical plate and a second vertical plate, the two surfaces of the first vertical plate and the second vertical plate are opposite and parallel to each other, the first vertical plate is detachably fixed on the base, a first through hole is formed in the first vertical plate, a second through hole is formed in the second vertical plate, and the two ends of the fixing shaft are respectively inserted and fixed in the first through hole and the second through hole.
A first convex block is fixed on the outer side plate surface of the first vertical plate, a first threaded hole is formed in the first convex block, the first threaded hole is communicated with the first through hole, the hole center lines of the first threaded hole and the first through hole are overlapped, a second convex block is fixed on the outer side plate surface of the second vertical plate, a second threaded hole is formed in the second convex block, the second threaded hole is communicated with the second through hole, the hole center lines of the second threaded hole and the second through hole are overlapped, and the first threaded hole and the second threaded hole are respectively matched with a first bolt and a second bolt to press and lock two.
The lower extreme middle part of first riser is equipped with the third lug, and draw-in groove and spacing groove are seted up to the base upper surface, and draw-in groove and spacing groove communicate with each other and the two makes up into the T style of calligraphy, and the first dog is arranged to the base upper surface position department of draw-in groove one side, and the draw-in groove is arranged between spacing groove and dog, and the spacing inslot is inserted and is put the second dog, and the upper end protrusion of second dog is outside the spacing groove, and the third lug of first riser lower extreme is inserted inside the draw-in groove and first dog and second dog are fixed with the face centre gripping of first riser.
The central line of the articulated shaft between the first supporting rod and the fixed shaft, the central line of the articulated shaft between the second supporting rod and the sliding block, the central lines of the articulated shaft between the two ends of the working rod and the first supporting rod and the second supporting rod are all vertically arranged along the axial length direction of the fixed shaft.
The fixed axle is the step axle, and the step axle is formed by little diameter axle and the concatenation of big diameter axle, and the slider cover is established on little diameter axle, and first branch is articulated with the axle body middle part of big diameter axle.
Has the advantages that: when the device is used, the vessel stent is sleeved outside the annular supporting part formed by surrounding all the working rods in the diameter supporting mechanism, the hollow tubular vessel stent is propped open by the working rods, the motor drives the sliding block to reciprocate along the axial direction of the fixed shaft through the crank-link mechanism, the working rods are hinged with the first supporting rod and the second supporting rod, the first supporting rod is hinged with the fixed shaft, the second supporting rod is hinged with the sliding block, the rod length direction of the working rods is parallel to the axial length direction of the fixed shaft, so that the working rods can be driven to stretch by the movement of the sliding block to realize the reciprocating opening fatigue test of the vessel stent, the whole device has a simpler structure, is convenient to operate, and can realize the automatic fatigue performance test of the vessel stent.
Drawings
FIG. 1 is a block diagram of the invention in cooperation with a vascular stent;
FIG. 2 is a block diagram of the present invention;
fig. 3 is a partial exploded view of the present invention.
Detailed Description
The invention is further described below in conjunction with fig. 1-3.
An in vitro testing device for fatigue performance of a blood vessel stent comprises a base 10, a supporting frame is arranged on the base 10, a diameter supporting mechanism 20 is detachably fixed on the supporting frame, the diameter supporting mechanism 20 comprises a fixed shaft 21, a sliding block 25 and a supporting rod unit, the supporting rod unit comprises a first supporting rod 22, a second supporting rod 23 and a working rod 24, one end of the first supporting rod 22 is hinged on the fixed shaft 21, the other end of the first supporting rod 22 is outwards suspended, one end of the second supporting rod 23 is hinged on the sliding block 25, the other end of the second supporting rod 23 is outwards suspended, the other end of the first supporting rod 22 and the other end of the second supporting rod 23 are close to each other, two ends of the working rod 24 are respectively hinged with the other end of the first supporting rod 22 and the other end of the second supporting rod 23, the rod length direction of the working rod 24 is parallel to the axial length direction of the fixed shaft 21, the supporting rod unit is more than, the blood vessel support 30 is sleeved outside an annular supporting part surrounded by the working rods 24 in all the supporting rod units, the sliding block 25 is sleeved on the fixed shaft 21, two ends of the fixed shaft 21 are detachably fixed on the supporting frames, the motor 40 is fixed on the supporting frames, and the motor 40 drives the sliding block 25 to move back and forth along the axial direction of the fixed shaft 21 through the crank connecting rod mechanism 50 so as to drive the annular supporting part to do radial telescopic movement.
When the device is used, the vascular stent 30 is firstly sleeved outside an annular supporting part surrounded by all the working rods 24 in the diameter supporting mechanism 20, the hollow tubular vascular stent 30 is supported by the working rods 24, the motor 40 is started, the motor 40 drives the sliding block 25 to reciprocate along the axial direction of the fixed shaft 21 through the crank-link mechanism 50, the working rods 24 are hinged with the first supporting rod 22 and the second supporting rod 23, the first supporting rod 22 is hinged with the fixed shaft 21, the second supporting rod 23 is hinged with the sliding block 25, and the rod length direction of the working rods 24 is parallel to the axial length direction of the fixed shaft 21, so that the working rods 24 are driven by the movement of the sliding block 25 to stretch and retract to realize the reciprocating support fatigue test on the vascular stent 30. In addition, the moving range of the sliding block 25 can be adjusted through the motor 40, so that the distraction diameter can be adjusted, and the requirement of the blood vessel stent 30 with different diameters can be met. When a group of vascular stents 30 need to be detected at the same time, the diameter-expanding mechanism 20 with a longer working rod 24 is arranged, and a group of vascular stents 30 are sequentially sleeved on the diameter-expanding mechanism, so that the group of vascular stents 30 can perform radial expanding motion at the same time, and the testing efficiency is greatly improved.
Preferably, the support frame includes a first vertical plate 61 and a second vertical plate 62, two opposite surfaces of which are parallel to each other, the first vertical plate 61 is detachably fixed on the base 10, the first vertical plate 61 is provided with a first through hole, the second vertical plate 62 is provided with a second through hole, and two ends of the fixing shaft 21 are respectively inserted and fixed in the first through hole and the second through hole.
Furthermore, a first convex block 63 is fixed on the outer side plate surface of the first vertical plate 61, a first threaded hole is formed in the first convex block 63, the first threaded hole is communicated with the first through hole, the hole center line of the first threaded hole coincides with the hole center line of the first through hole, a second convex block 64 is fixed on the outer side plate surface of the second vertical plate, a second threaded hole is formed in the second convex block 64, the second threaded hole is communicated with the second through hole, the hole center line of the second threaded hole coincides with the hole center line of the second through hole, and the first threaded hole and the second threaded hole are respectively matched with the first bolt 65 and the second bolt 66. The fixing shaft 21 is firmly fixed by the first bolt 65 and the second bolt 66, the test is ensured to be smoothly carried out, and the radial expansion range can be changed by adjusting the screwing-in degree of the first bolt 65 and the second bolt 66. For example, the second bolt 66 is screwed back, and the first bolt 65 is screwed in, so that the fixed shaft 21 moves towards the end where the second bolt 66 is located, and the radial expansion range is enlarged; conversely, the radial expansion range becomes smaller.
Furthermore, a third bump 611 is arranged in the middle of the lower end of the first vertical plate 61, a clamping groove 11 and a limiting groove 12 are formed in the upper surface of the base 10, the clamping groove 11 is communicated with the limiting groove 12 and is combined into a T shape, a first stop 13 is arranged on the upper surface of the base 10 on one side of the clamping groove 11, the clamping groove 11 is arranged between the limiting groove 12 and the stop 13, a second stop 14 is inserted into the limiting groove 12, the upper end of the second stop 14 protrudes out of the limiting groove 12, the third bump 611 at the lower end of the first vertical plate 61 is inserted into the clamping groove 11, and the first stop 13 and the second stop 14 clamp and fix the surface of the first vertical plate 61. When the intravascular stent 30 is to be replaced, the first vertical plate 61 can be detached only by withdrawing the second stopper 14, which is convenient.
In order to ensure that the working rod 24 can extend and contract along the radial direction when the annular supporting part surrounding the working rod 24 extends and contracts, the central line of the hinge shaft between the first supporting rod 22 and the fixed shaft 21, the central line of the hinge shaft between the second supporting rod 23 and the sliding block 25, and the central lines of the hinge shaft between the two ends of the working rod 24 and the first supporting rod 22 and the second supporting rod 23 are all arranged perpendicular to the axial length direction of the fixed shaft 21.
Preferably, the fixed shaft 21 is a step shaft, the step shaft is formed by splicing a small-diameter shaft and a large-diameter shaft, the sliding block 25 is sleeved on the small-diameter shaft, and the first supporting rod 22 is hinged to the middle of the shaft body of the large-diameter shaft. The step between the small-diameter shaft and the large-diameter shaft can limit the movement of the slider 25.
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 an external testing arrangement of vascular support fatigue performance which characterized in that: comprises a base (10), a supporting frame is arranged on the base (10), a diameter supporting mechanism (20) is detachably fixed on the supporting frame, the diameter supporting mechanism (20) comprises a fixed shaft (21), a sliding block (25) and a supporting rod unit, the supporting rod unit comprises a first supporting rod (22), a second supporting rod (23) and a working rod (24), one end of the first supporting rod (22) is hinged on the fixed shaft (21), the other end of the first supporting rod (22) is outwards suspended and extended, one end of the second supporting rod (23) is hinged on the sliding block (25), the other end of the second supporting rod (23) is outwards suspended and extended, the other end of the first supporting rod (22) and the other end of the second supporting rod (23) are close to each other, two ends of the working rod (24) are respectively hinged with the other end of the first supporting rod (22) and the other end of the second supporting rod (23), the rod length direction of the working rod (24) is parallel to the shaft length direction of the, the supporting rod units are more than two and are arranged at intervals along the circumferential direction of the fixed shaft (21), the blood vessel support (30) is sleeved outside an annular supporting part surrounded by working rods (24) in all the supporting rod units, the sliding block (25) is sleeved on the fixed shaft (21), two ends of the fixed shaft (21) are detachably fixed on the supporting frame, the motor (40) is fixed on the supporting frame, and the motor (40) drives the sliding block (25) to move back and forth along the axial direction of the fixed shaft (21) through a crank connecting rod mechanism (50) so as to drive the annular supporting part to move radially in a telescopic mode.
2. The in vitro testing device for fatigue performance of the blood vessel stent of claim 1, wherein: the support frame comprises a first vertical plate (61) and a second vertical plate (62) which are opposite in plate surfaces and parallel to each other, the first vertical plate (61) is detachably fixed on the base (10), a first through hole is formed in the first vertical plate (61), a second through hole is formed in the second vertical plate (62), and two ends of the fixing shaft (21) are respectively inserted and fixed in the first through hole and the second through hole.
3. The in vitro testing device for fatigue performance of the blood vessel stent according to claim 2, wherein: a first convex block (63) is fixed on the outer side plate surface of the first vertical plate (61), a first threaded hole is formed in the first convex block (63), the first threaded hole is communicated with the first through hole, the center line of the hole is coincident, a second convex block (64) is fixed on the outer side plate surface of the second vertical plate, a second threaded hole is formed in the second convex block (64), the second threaded hole is communicated with the second through hole, the center line of the hole is coincident, and the first threaded hole and the second threaded hole are respectively matched with a first bolt (65) and a second bolt (66) to press and lock the two ends of the fixed shaft (21).
4. The in vitro testing device for fatigue performance of the blood vessel stent of claim 3, wherein: the middle part of the lower end of the first vertical plate (61) is provided with a third bump (611), the upper surface of the base (10) is provided with a clamping groove (11) and a limiting groove (12), the clamping groove (11) is communicated with the limiting groove (12) and the limiting groove (12) are combined into a T shape, a first stop block (13) is arranged at the position of the upper surface of the base (10) on one side of the clamping groove (11), the clamping groove (11) is arranged between the limiting groove (12) and the stop block (13), a second stop block (14) is inserted into the limiting groove (12), the upper end of the second stop block (14) protrudes out of the limiting groove (12), the third bump (611) at the lower end of the first vertical plate (61) is inserted into the clamping groove (11), and the first stop block (13) and the second stop block (14) clamp and fix the surface of the first.
5. The in vitro testing device for fatigue performance of the blood vessel stent according to claim 4, wherein: the central line of a hinge shaft between the first support rod (22) and the fixed shaft (21), the central line of a hinge shaft between the second support rod (23) and the sliding block (25), the central lines of two ends of the working rod (24), the hinge shaft between the first support rod (22) and the second support rod (23) and the axial length direction of the fixed shaft (21) are vertically arranged.
6. The in vitro testing device for fatigue performance of the blood vessel stent of claim 5, wherein: fixed axle (21) are the step axle, and the step axle is formed by little diameter axle and the concatenation of big diameter axle, and slider (25) cover is established on little diameter axle, and first branch (22) are articulated with the axle body middle part of big diameter axle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910994500.4A CN110617955B (en) | 2019-10-18 | 2019-10-18 | External testing device for fatigue performance of blood vessel support |
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| CN201910994500.4A CN110617955B (en) | 2019-10-18 | 2019-10-18 | External testing device for fatigue performance of blood vessel support |
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| CN110617955A true CN110617955A (en) | 2019-12-27 |
| CN110617955B CN110617955B (en) | 2021-08-24 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111658253A (en) * | 2020-06-16 | 2020-09-15 | 西安交通大学医学院第一附属医院 | Cardiovascular stent conveyor |
| CN112198053A (en) * | 2020-09-29 | 2021-01-08 | 江苏理工学院 | External loading device for blood vessel stent |
| CN112255129A (en) * | 2020-10-22 | 2021-01-22 | 江苏理工学院 | External torsion loading device for intravascular stent |
| CN113916450A (en) * | 2021-10-19 | 2022-01-11 | 宋东梅 | Multi-parameter performance detection system for condom production and use method thereof |
| CN117503220A (en) * | 2024-01-02 | 2024-02-06 | 北京华脉泰科医疗器械股份有限公司 | Vascular diameter-adjusting device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111658253A (en) * | 2020-06-16 | 2020-09-15 | 西安交通大学医学院第一附属医院 | Cardiovascular stent conveyor |
| CN111658253B (en) * | 2020-06-16 | 2023-08-29 | 西安交通大学医学院第一附属医院 | Cardiovascular stent conveyer |
| CN112198053A (en) * | 2020-09-29 | 2021-01-08 | 江苏理工学院 | External loading device for blood vessel stent |
| CN112255129A (en) * | 2020-10-22 | 2021-01-22 | 江苏理工学院 | External torsion loading device for intravascular stent |
| CN112255129B (en) * | 2020-10-22 | 2023-06-27 | 江苏理工学院 | External torsion loading device of vascular stent |
| CN113916450A (en) * | 2021-10-19 | 2022-01-11 | 宋东梅 | Multi-parameter performance detection system for condom production and use method thereof |
| CN117503220A (en) * | 2024-01-02 | 2024-02-06 | 北京华脉泰科医疗器械股份有限公司 | Vascular diameter-adjusting device |
| CN117503220B (en) * | 2024-01-02 | 2024-04-02 | 北京华脉泰科医疗器械股份有限公司 | Vascular diameter-adjusting device |
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