CN202614543U - Testing equipment of intravascular stent mechanical property - Google Patents
Testing equipment of intravascular stent mechanical property Download PDFInfo
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- CN202614543U CN202614543U CN 201220237677 CN201220237677U CN202614543U CN 202614543 U CN202614543 U CN 202614543U CN 201220237677 CN201220237677 CN 201220237677 CN 201220237677 U CN201220237677 U CN 201220237677U CN 202614543 U CN202614543 U CN 202614543U
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Abstract
The present utility model discloses testing equipment of intravascular stent mechanical property. The testing equipment comprises an image acquisition and processing module, a control end, a data acquisition module, an automatic loading module and an anti-extruding performance testing device which are successively connected in series. The testing equipment of intravascular stent mechanical property also comprises an expansion performance testing device, a flexibility performance testing device, a removing force testing device and a conveying performance testing device. The testing equipment can be used for realizing multifunctional mechanical property tests of an intravascular stent.
Description
Technical field
The utility model relates to a kind of testing apparatus of mechanical property of medicine equipment, specifically, relates to a kind of testing apparatus of intravascular stent mechanical property.
Background technology
Along with China's rapid economy development, the raising of living standards of the people and the change of life style, evidence of coronary heart diseases also rises year by year, has become and has jeopardized one of healthy and safe principal disease of human life.At present the method for treatment coronary heart disease is many, and PCI because of its have hemorrhage less, wound is little, complication is few, safe and reliable, advantage such as operative results is fast, more and more receives people's attention.As the vitals of intravascular stent art, the performance of intravascular stent influences one of key factor of intravascular stent operation clinical effectiveness beyond doubt.The intravascular stent that has superperformance can make the conveying of intravascular stent become efficient and convenient, reduces in the implantation process damage to vascular wall, and intravascular stent is dropped to minimum to the long-time stimulus effect of vascular wall.The relevant intravascular stent performance of success ratio with operation mainly comprises clinically: transmission property (deliverability), compliance (flexibility) and radiation tension force (radial strenth; Be equivalent to radial support power); The above two have determined the ability of intravascular stent through pathology, especially twist pathology; The latter is used to represent to prevent the intravascular stent performance of vessel wall elasticity retraction, and radiation tension force intravascular stent preferably is fit to opening and hard pathology.In addition; In the selectivity vascular lesion, the mortality average out to 6% (average mortality scope 3% ~ 14%) of DS (directing stenting, directly intravascular stent implantation) in treatment; This just is illustrated in intravascular stent and inserts when failing; Withdrawing from intravascular stent is a vital decision, the intravascular stent slippage in this process, may occur in the circulation system, causes severe complications.Therefore, before intravascular stent goes through to use, its power that removes of carrying out is tested the important that also seems.
But the research through summing up present intravascular stent performance test can find, domestic scholars for the research of support performance test seldom, and to the research of dependence test device phoenix feathers and unicorn horns especially just; Though and external scholar did some researchs, also there are some problems, single like proving installation; Existing proving installation mostly is in the experimental study stage; And test index is single, can only test narrow application range to a certain performance of support usually.And for example for the test of anti-extrusion performance, present researchist generally adopts laser that the diameter of support is measured, and so just can't observe the metamorphosis of support in extrusion process, also can't do deep analysis to the failure mode of support.Though some researchist has considered this point in addition, adopt machine vision to measure, ignored support in extrusion process used for forming, its xsect can present ellipticity usually, and this often can produce bigger influence to experimental result.In addition, removing masterpiece is the important performance index of support, is also listed in one of the project that must survey by State Food and Drug Administration, departments such as (FDA) of FDA, but very few about its Research of measuring at present.
Summary of the invention
Technical matters: the utility model technical matters to be solved is, a kind of testing apparatus of intravascular stent mechanical property is provided, and utilizes this equipment can be under the situation of simulated blood vessel support internal milieu, the multiple mechanical property of test intravascular stent.
Technical scheme: for solving the problems of the technologies described above, the technical scheme that the utility model adopts is:
A kind of testing apparatus of intravascular stent mechanical property, this testing apparatus comprise IMAQ and processing module, control end, data acquisition module, automatic load-on module and the anti-extrusion performance proving installation of serial connection successively; Wherein, described IMAQ and processing module comprise video camera and image pick-up card, and the output terminal of video camera is connected through data line with the input end of image pick-up card, and image pick-up card is plugged on the mainboard of control end; Described data acquisition module comprises data collecting card and terminal box, and data collecting card is plugged on the mainboard of control end, and the connection terminal of terminal box is connected through data line with the input end of data collecting card; Described automatic load-on module comprises stepper motor driver, stepper motor and line slideway; The input end of stepper motor driver is connected through cable with terminal box; The output terminal of stepper motor driver is connected through cable with the input end of stepper motor, and the PTO of stepper motor is connected with leading screw in the line slideway through shaft coupling; Described anti-extrusion performance proving installation comprises graduated tube, first backlight, annular seal space, transparent hose, pressure unit, water tank, first T-valve, second T-valve and medical irrigator; Baffle plate on the push rod of medical irrigator and the mobile platform of line slideway is relative; The outlet of medical irrigator is connected with first valve port of first T-valve; Second valve port of first T-valve is connected with first valve port of second T-valve, and the 3rd valve port of first T-valve is connected with the water delivering orifice of water tank, and second valve port of second T-valve is communicated with the cavity of annular seal space; The 3rd valve port of second T-valve is connected with the pressure interface port of pressure unit; Transparent hose is fixed in the annular seal space, and transparent hose is in horizontality, and the bottom of graduated tube is communicated with the inner chamber of transparent hose through pipeline; First backlight and video camera lay respectively at the both sides of annular seal space, and transparent hose is positioned at the range of exposures of first backlight.
Further; The testing apparatus of described intravascular stent mechanical property; Also comprise the 3rd T-valve and spreading performance proving installation, described spreading performance proving installation comprises second backlight, first foley's tube and airtight cavity, and first foley's tube is fixed in the airtight cavity; Second backlight and video camera lay respectively at the both sides of airtight cavity, and first foley's tube is positioned at the range of exposures of second backlight; Described the 3rd T-valve is between second T-valve and annular seal space; And second valve port of second T-valve is connected with first valve port of the 3rd T-valve; Second valve port of the 3rd T-valve is communicated with the cavity of annular seal space, and the 3rd valve port of the 3rd T-valve is communicated with first foley's tube.
Further; The testing apparatus of described intravascular stent mechanical property; Also comprise the compliance proving installation, this compliance proving installation comprises drill chuck, first Micro-force sensor and translation stage, and first Micro-force sensor is fixed on the mobile platform of line slideway; Drill chuck is fixed on the end face of translation stage, and translation stage is positioned at the coverage of video camera.
Further, the testing apparatus of described intravascular stent mechanical property also comprises removing force test device; This removes force test device and comprises second Micro-force sensor, pad and second foley's tube; Micro-force sensor is fixed on the mobile platform of line slideway, is provided with seal wire in the inner chamber of second foley's tube, and the two ends of seal wire are positioned at second foley's tube outside; Pad is provided with through hole, and second foley's tube interts in the through hole of pad.
Further; The testing apparatus of described intravascular stent mechanical property; Also comprise removing force test device, this removes force test device and comprises second Micro-force sensor, second foley's tube, adhesive tape and locating rack, and second Micro-force sensor is fixed on the mobile platform of line slideway; Be provided with seal wire in the inner chamber of second foley's tube; And the two ends of seal wire are positioned at second foley's tube outside, and intravascular stent is pressed the outside surface that is held in second foley's tube, and intravascular stent passes through adhesive tape bonding on locating rack.
Further; The testing apparatus of described intravascular stent mechanical property comprises also and carries the property testing device that this conveying property testing device comprises the 3rd Micro-force sensor, the 3rd foley's tube, the 4th Micro-force sensor, vascular pattern and fixed station; Be provided with crooked through hole in the vascular pattern; The 3rd Micro-force sensor is fixed on the mobile platform of line slideway, and is positioned at sustained height with vascular pattern, and vascular pattern and the 4th Micro-force sensor are separately fixed on the fixed station; The outlet of the through hole of the block of the 4th Micro-force sensor and vascular pattern one side is relative, and the 4th Micro-force sensor and vascular pattern are in sustained height; The 3rd foley's tube is interspersed in the through hole of vascular pattern.
Beneficial effect: compared with prior art, the utlity model has following beneficial effect:
1. can carry out multi-functional performance test to intravascular stent.The testing apparatus of the intravascular stent mechanical property of the utility model can be accomplished intravascular stent spreading performance, anti-extrusion performance, compliance, conveying property and remove the test of power multinomial performance.It carries out integrated and comprehensive Design to each test module, and adopts modular automatic loading device and data acquisition equipment, is convenient to the recycling of each test module, has simplified design objective greatly, has reduced system's error rate, has also reduced cost simultaneously.
2. the anti-extrusion performance test of intravascular stent is more accurate.Intravascular stent is in extrusion process; Its xsect is generally flat; Adopt machine vision or its diameter of laser measurement, bigger measuring error often arranged, and utilize in the utility model with graduated tube that thin walled hose links to each other in the variation of liquid-column height; Calculate the vary in diameter of intravascular stent, can effectively avoid this point.Simultaneously, the implantation of support is in order to strut narrow blood vessel, and adopts volume change to ask for effective diameter, can reflect better that support keeping the ability of blood flow aspect unimpeded.
3. the utility model improves the structure of annular seal space, has reduced the measuring error that distortion causes on the one hand, also is convenient to the installation and the location of intravascular stent simultaneously.
Description of drawings
Fig. 1 is the structure wiring layout of the utility model.
Fig. 2 is the structural representation of the annular seal space in the utility model.
Have among the figure: IMAQ and processing module 1; Video camera 101; Image pick-up card 102; Control end 2; Data acquisition module 3; Data collecting card 301; Terminal box 302; Automatic load-on module 4; Stepper motor driver 401; Stepper motor 402; Line slideway 403; Contact-making switch 404; Anti-extrusion performance proving installation 5; Graduated tube 501; First backlight 502; Annular seal space 503; Cavity 5031; First end cap 5032; First fixed bar 5033; Second fixed bar 5034; Second end cap 5035; O-ring seal 5036; Transparent hose 504; Pressure unit 505; Water tank 506; First T-valve 507; Second T-valve 508; Medical irrigator 509; The 3rd T-valve 6; Spreading performance proving installation 7; Second backlight 701; First foley's tube 702; Airtight cavity 703; Compliance proving installation 8; Drill chuck 801; First Micro-force sensor 802; Translation stage 803; Remove force test device 9; Second Micro-force sensor 901; Pad 902; Second foley's tube 903; Adhesive tape 904; Locating rack 905; Carry property testing device 10; The 3rd Micro-force sensor 1001; The 3rd foley's tube 1002; The 4th Micro-force sensor 1003; Vascular pattern 1004.
Embodiment
Below in conjunction with accompanying drawing, the technical scheme of the utility model is carried out detailed explanation.
As shown in Figure 1, the testing apparatus of a kind of intravascular stent mechanical property of the utility model comprises IMAQ and processing module 1, control end 2, data acquisition module 3, automatic load-on module 4 and the anti-extrusion performance proving installation 5 of serial connection successively.IMAQ and processing module 1 comprise video camera 101 and image pick-up card 102.The output terminal of video camera 101 is connected through data line with the input end of image pick-up card 102, and image pick-up card 102 is plugged on the mainboard of control end 2.Data acquisition module 3 comprises data collecting card 301 and terminal box 302.Data collecting card 301 is plugged on the mainboard of control end 2, and the connection terminal of terminal box 302 is connected through data line with the input end of data collecting card 301.Automatically load-on module 4 comprises stepper motor driver 401, stepper motor 402 and line slideway 403.The input end of stepper motor driver 401 and terminal box 302 are connected through cable; The output terminal of stepper motor driver 401 is connected through cable with the input end of stepper motor 402, and the PTO of stepper motor 402 is connected with leading screw in the line slideway 403 through shaft coupling.Anti-extrusion performance proving installation 5 comprises graduated tube 501, first backlight 502, annular seal space 503, transparent hose 504, pressure unit 505, water tank 506, first T-valve 507, second T-valve 508 and medical irrigator 509.The wall thickness of transparent hose 504 is 0.08mm-0.1mm.Baffle plate on the mobile platform of the push rod of medical irrigator 509 and line slideway 403 is relative; The outlet of medical irrigator 509 is connected with first valve port of first T-valve 507; Second valve port of first T-valve 507 is connected with first valve port of second T-valve 508; The 3rd valve port of first T-valve 507 is connected with the water delivering orifice of water tank 506; Second valve port of second T-valve 508 is communicated with the cavity of annular seal space 503, and the 3rd valve port of second T-valve 508 is connected with the pressure interface port of pressure unit 505.Transparent hose 504 is fixed in the annular seal space 503, and transparent hose 504 is in horizontality.The bottom of graduated tube 501 is communicated with the inner chamber of transparent hose 504 through pipeline.First backlight 502 and video camera 101 lay respectively at the both sides of annular seal space 503, and transparent hose 504 is positioned at the range of exposures of first backlight 502.
Utilize the testing apparatus of said structure, intravascular stent is carried out anti-extrusion performance test.Detailed process is: earlier utilize induction system to be placed on the middle part of transparent hose 504 inner chambers intravascular stent, and its expansion is come, then induction system is withdrawn from, make the inner chamber of transparent hose 504 be communicated with graduated tube 501.In transparent hose 504 inner chambers, inject an amount of colourless liquid, make the liquid-column height in the graduated tube 501 exceed minimum scale, and record liquid-column height this moment.Regulate first T-valve 507, second T-valve 508 and the 3rd T-valve 6, make the intracavity inter-connection of 509 of medical irrigators and pressure unit 505 and annular seal space 503.Open the video camera 101 and first backlight 502, utilize video camera 101 to grasp the image of intravascular stents, and through image pick-up card 102, be sent to control end 2 and handle and show.Regulate the video camera 101 and first backlight 502, make the clear-cut of intravascular stent visible, set maximum pressure value and single step value then, and begin to load.Control end is through data collecting card 301; Through terminal box 302 and cable; Send control signals such as pulse to stepper motor driver 401, stepper motor driver 401 rotates according to given speed and direction drive stepping motor 402, moves thereby drive line slideway 403.Line slideway 403 promotes medical irrigator 509 through top baffle plate, progressively in annular seal space 503, pressurizes, and general maximum pressure value is made as 2-2.5bar, and single step value is made as 0.1bar usually.When single pressurization keeps and after the single release finishes; IMAQ and processing module 1 will be obtained the image of intravascular stent this moment automatically, and deliver to control end 2 and carry out analyzing and processing, draw the diameter of intravascular stent this moment; Simultaneously; The height of liquid in the record graduated tube 501, control end 2 are handled it, can calculate the effective diameter of intravascular stent this moment.Find that in experimentation intravascular stent takes place obviously to cave in; Can stop experiment, test sample finishes, otherwise waits until always and be loaded into maximum pressure; According to the vary in diameter rate of intravascular stent and the relation of pressure, can draw the anti-extrusion performance of intravascular stent to be measured then.
Further, the testing apparatus of described intravascular stent mechanical property also comprises the 3rd T-valve 6 and spreading performance proving installation 7.Spreading performance proving installation 7 comprises second backlight 701, first foley's tube 702 and airtight cavity 703.First foley's tube 702 is fixed in the airtight cavity 703, and second backlight 701 and video camera 101 lay respectively at the both sides of airtight cavity 703, and first foley's tube 702 is positioned at the range of exposures of second backlight 701.The 3rd T-valve 6 is between second T-valve 508 and annular seal space 503; And second valve port of second T-valve 508 is connected with first valve port of the 3rd T-valve 6; Second valve port of the 3rd T-valve 6 is communicated with the cavity of annular seal space 503, and the 3rd valve port of the 3rd T-valve 6 is communicated with first foley's tube 702.
Utilize the testing apparatus of said structure, intravascular stent is carried out the spreading performance test.Detailed process is: at first will contain and press first foley's tube 702 of holding intravascular stent to be fixed on the centre position in the airtight cavity 703; Regulate first T-valve 507 then; Second T-valve 508 and the 3rd T-valve 6 link to each other 509 end interface with the pressure unit 505 and first foley's tube 702 of medical irrigator.Regulate the video camera 101 and second backlight 701, make the clear-cut of intravascular stent visible, then according to the nominal spreading pressure shown on the survey intravascular stent label, setting maximum load pressure and single step value.Utilizing automatic load-on module 4 to promote medical irrigator 509 progressively pressurizes in airtight cavity 703; IMAQ and processing module 1 will be obtained the image of intravascular stent this moment automatically this moment; And deliver to control end 2 and carry out analyzing and processing, draw the diameter and the length of intravascular stent this moment.When being loaded into the nominal spreading pressure, fully expand for making intravascular stent, pressure keeps 15-30s, and then measures.First sacculus 702 is carried out release, 10s laggard promoting circulation of blood pipe holder diameter and measurement of length.Control end 2 is according to measurement result then, and the radially rebound degree of intravascular stent and axial cripetura rate/length growth rate are calculated.Wherein the radially resilience computing formula of intravascular stent measuring point is following:
In the formula: D
Inf latedBe the external diameter of intravascular stent on first foley's tube 702 of expansion, D
FinalFor discharging the external diameter of first foley's tube, 702 back intravascular stents.And the cripetura of intravascular stent rate/length growth rate computing formula is:
In the formula: Δ L is the length variations before and after the intravascular stent expansion, L
LoadedLength when not expanding for intravascular stent.
Further, the testing apparatus of described intravascular stent mechanical property also comprises compliance proving installation 8.Compliance proving installation 8 comprises drill chuck 801, first Micro-force sensor 802 and translation stage 803.First Micro-force sensor 802 is fixed on the mobile platform of line slideway 403, and drill chuck 801 is fixed on the end face of translation stage 803, and translation stage 803 is positioned at the coverage of video camera 101.
Utilize the testing apparatus of said structure, intravascular stent is carried out the compliance test.Detailed process is: at first regulate first T-valve, 507, the second T-valve 508 and the 3rd T-valve 6,509 of medical irrigators are connected with water tank 506.One end of intravascular stent is fixed on the drill chuck 801, and the clamping dynamics is moderate, promptly needs on the one hand to guarantee that intravascular stent can not be moved in test process, can not cause breaking-up to intravascular stent on the other hand.If to be measured is the intravascular stent after the expansion, need go into a solid cylinder at the end plug that intravascular stent is fixed, fixedly the time in order to avoid gross distortion takes place intravascular stent.Regulate the height of intravascular stent bare terminal end, the striker at intravascular stent and first Micro-force sensor, 802 tops is positioned on the same surface level.Then according to the length of intravascular stent; Select suitable loading length; Regulate translation stage 803 and line slideway 403 again, make the striker at first Micro-force sensor, 802 tops and the bare terminal end of intravascular stent be positioned at same position, write down the scale of translation stage 803 this moment; Regulate translation stage 803 then, making load(ing) point is the loading length of appointment to the distance of intravascular stent bite.Utilize automatic load-on module 4 that first Micro-force sensor 802 is transferred to correct position, promptly the striker at first Micro-force sensor, 802 tops just contacts with intravascular stent at this moment.If need the distortion situation of IMAQ and 1 pair of intravascular stent of processing module to observe, then regulate video camera 101, make clear picture visible.According to loading length, set the maximum displacement of loading velocity and load(ing) point, and utilize automatic load-on module 4 to begin to load then; Utilize thrust and displacement in 3 pairs of loading procedures of data acquisition module to gather simultaneously, stop when reaching maximum displacement loading and recession completion unloading, reload again; After measuring 3-5 time on each direction; Intravascular stent is rotated 45 degree around the axle center, and measure again, on 5 directions, all accomplish and measure.The compliance of intravascular stent utilizes bending stiffness EI to estimate, and:
In the formula: EI is the bending stiffness (Nm of intravascular stent to be measured
2), F is the load (N) that is applied on the intravascular stent to be measured, i.e. the thrust that records of first Micro-force sensor 802, and f is the amount of deflection (m) of load(ing) point, and l is for loading length, and promptly load(ing) point is to the distance (m) of intravascular stent stiff end.
Further, the testing apparatus of described intravascular stent mechanical property also comprises removing force test device 9.Remove force test device 9 and comprise second Micro-force sensor 901, pad 902 and second foley's tube 903.Second Micro-force sensor 901 is fixed on the mobile platform of line slideway 403; Be provided with seal wire in the inner chamber of second foley's tube 903; And the two ends of seal wire are positioned at second foley's tube, 903 outsides, and pad 902 is provided with through hole, and second foley's tube 903 interts in the through hole of pad 902.
Utilize the testing apparatus of said structure, intravascular stent type of guiding removed the power test.Detailed process is: at first regulate first T-valve, 507, the second T-valve 508 and the 3rd T-valve 6,509 of medical irrigators are connected with water tank 506.To contain then and press the near-end of second foley's tube 903 of holding intravascular stent to be fixed on second Micro-force sensor 901, setting point of fixity and pressure are held the distance between the intravascular stent near-end.The other end of second foley's tube 903 is passed the circular hole that pad 902 is formed; Need this moment to guarantee to press the near-end of holding intravascular stent to exceed pad 902; And when pulling back second foley's tube 903; Pad 902 can just stop to press holds moving of intravascular stent, and does not influence moving of second foley's tube 903.Utilize automatic load-on module 4 to spur second foley's tube 903 backward; Record pulling force and displacement at this moment simultaneously; Wherein pulling force is measured by second Micro-force sensor 901, and displacement then obtains through the umber of pulse that calculated step motor driver 401 sends, and data acquisition module 3 is accomplished the collection of data automatically; And be sent to control end 2, accomplish the analysis and the processing of data.What remove power usually confirms to be divided into two types: displacement force and breakaway force.Wherein displacement force comprises initial displacement power, initial spike power again and closes the bond shifting peak force; Wherein initial spike power and initial displacement power often are considered to equate; Close the bond shifting peak force and be meant induction system needed maximum pull when reaching the pass bond shifting; Breakaway force then is meant pulls out needed maximum pull with intravascular stent fully from foley's tube, and these can obtain from displacement-pull-up curve.
Further, the testing apparatus of described intravascular stent mechanical property also comprises removing force test device 9.Remove force test device 9 and comprise second Micro-force sensor 901, second foley's tube 903, adhesive tape 904 and locating rack 905.Micro-force sensor 901 is fixed on the mobile platform of line slideway 403; Be provided with seal wire in the inner chamber of second foley's tube 903; And the two ends of seal wire are positioned at second foley's tube, 903 outsides; Intravascular stent is pressed the outside surface that is held in second foley's tube 903, and intravascular stent is bonded on the locating rack 905 through adhesive tape 904.
Utilize the testing apparatus of said structure, intravascular stent is carried out the pathology class remove the power test.Detailed process is: at first regulate first T-valve, 507, the second T-valve 508 and the 3rd T-valve 6,509 of medical irrigators are connected with water tank 506.To contain then and press the near-end of second foley's tube 903 of holding intravascular stent to be fixed on second Micro-force sensor 901, setting point of fixity and pressure are held the distance between the intravascular stent near-end.With pressure hold intravascular stent be wrapped in adhesive tape about in the of 904 two-layer between; And guarantee that the two relative slip can not take place in test process; Adhesive tape 904 and 903 of second foley's tubes are contactless simultaneously; The two ends of adhesive tape 904 are fixed on the locating rack 905, and guarantee that the adhesive tape 904 and second foley's tube 903 are 90 degree.Utilize automatic load-on module 4 to spur second foley's tube 903 backward; Record pulling force and displacement at this moment simultaneously; Wherein pulling force is measured by second Micro-force sensor 901, and displacement then obtains through the umber of pulse that calculated step motor driver 401 sends, and data acquisition module 3 is accomplished the collection of data automatically; And be sent to control end 2, accomplish the analysis and the processing of data.
Further, the testing apparatus of described intravascular stent mechanical property also comprises and carries property testing device 10.Carry property testing device 10 to comprise the 3rd Micro-force sensor 1001, the 3rd foley's tube 1002, the 4th Micro-force sensor 1003, vascular pattern 1004 and fixed station.Be provided with crooked through hole in the vascular pattern 1004, the 3rd Micro-force sensor 1001 is fixed on the mobile platform of line slideway 403, and is positioned at sustained height with vascular pattern 1004, and vascular pattern 1004 and the 4th Micro-force sensor 1003 are separately fixed on the fixed station.The outlet of the through hole of the block of the 4th Micro-force sensor 1003 and vascular pattern 1,004 one sides is relative, and the 4th Micro-force sensor 1003 is in sustained height with vascular pattern 1004; The 3rd foley's tube 1002 is interspersed in the through hole of vascular pattern 1004.
Utilize the testing apparatus of said structure, intravascular stent is carried property testing.Detailed process is: the conveying property testing of intravascular stent is divided into two types: tracking property and propelling movement property.Vascular pattern 1004 in the test is made up of two poly (methyl methacrylate) plates that have half slot up and down; Principle design is learned according to the human body coronary artery anatomy in the path of half slot; Simultaneously before the intravasation model; The left coronary artery angiography catheter of one section Judkins 3.56F is arranged, be used for guiding induction system.When following the trail of property testing, select test path at first as requested, then through the guiding of seal wire, will contain and press the front end of the 3rd foley's tube 1002 of holding intravascular stent to put into selected simulaed path through guide wire.The end of the 3rd foley's tube 1002 is fixed on the mobile platform of line slideway 403 through the 3rd Micro-force sensor 1001; And, make the top of the 3rd foley's tube 1002 be positioned at the test initial point through adjusting the relative position of the 3rd foley's tube 1002 and the 3rd Micro-force sensor 1001.Set loading velocity then; Pushing the 3rd foley's tube 1002 through automatic load-on module 4 advances along specified path; Utilize the terminal thrust and the displacement of 3 pairs the 3rd foley's tubes 1002 of data acquisition module to gather simultaneously, when the 3rd foley's tube 1002 arrives assigned address, the test completion; Then the weighted mean value of the thrust that is collected is followed the trail of the evaluation index of property as this induction system, and the bigger zone of thrust is analyzed.
When pushing property testing, earlier the front end of the 3rd foley's tube 1002 is passed the through hole of vascular pattern 1004, this through hole only has a paths, does not have the branch road, does not link to each other with other paths.The end face of solid block flushes basically on the far-end of the 3rd foley's tube 1002 and the 4th Micro-force sensor 1003.Near-end with the 3rd foley's tube 1002 is fixed on the mobile platform of line slideway 403 through the 3rd Micro-force sensor 1001 then; Set loading velocity and maximum load power; Utilize automatic load-on module 4; At the near-end applied thrust of the 3rd foley's tube 1002, utilize data acquisition module 3 to write down the thrust of the 3rd Micro-force sensor 1001 and the 4th Micro-force sensor 1003 simultaneously, reach predetermined value until the 3rd Micro-force sensor 1001.Then according to formula: P=(F
Dist/ F
Prox) * 100% obtains the propelling movement property of the induction system of surveying, wherein F
DistFor being sent to the thrust of the 3rd foley's tube 1002 far-ends, i.e. the thrust that records of the 4th Micro-force sensor 1003, and F
ProxFor being applied to the thrust of the 3rd foley's tube 1002 near-ends, i.e. the thrust that records of the 3rd Micro-force sensor 1001.
Further; The structure of annular seal space 503 can be multiple; The preferred following structure of the utility model: as shown in Figure 2, annular seal space 503 comprises that cavity 5031, first end cap 5032, middle part are that first fixed bar 5033, the middle part of through hole is second fixed bar 5034 and second end cap 5035 of blind hole.The xsect of cavity 5031 is square, and first end cap 5032 and second end cap 5035 are separately fixed at the end face of cavity 5031, and between first end cap 5032 and the cavity 5031, and be equipped with O-ring seal 5036 between second end cap 5035 and the cavity 5031.First fixed bar, 5033 interspersed being fixed on first end cap 5032, and be provided with O-ring seal between first fixed bar 5033 and first end cap 5032.Second fixed bar, 5034 interspersed being fixed on second end cap 5035, and be provided with O-ring seal between second fixed bar 5034 and second end cap 5035.As a kind of preferred, first fixed bar 5033 and second fixed bar 5034 all are positioned on the axis of cavity 5031.The cavity 5031 of annular seal space 503 is preferably processed by organic glass.
Further, for strengthening overload protection, the testing apparatus of described intravascular stent mechanical property comprises that also 404, two contact-making switches 404 of two contact-making switches are installed on the two ends of line slideway 403.When the mobile platform on the line slideway 403 arrives the extreme position at two ends; The contact-making switch 404 of relevant position will be exported high level; And be sent to control end 2 through data acquisition module 3 and handle, mobile platform will stop to move automatically, thereby realize overload protection function.
Claims (10)
1. the testing apparatus of an intravascular stent mechanical property; It is characterized in that this testing apparatus comprises IMAQ and processing module (1), control end (2), data acquisition module (3), automatic load-on module (4) and the anti-extrusion performance proving installation (5) of serial connection successively; Wherein,
Described IMAQ and processing module (1) comprise video camera (101) and image pick-up card (102); The output terminal of video camera (101) is connected through data line with the input end of image pick-up card (102), and image pick-up card (102) is plugged on the mainboard of control end (2);
Described data acquisition module (3) comprises data collecting card (301) and terminal box (302); Data collecting card (301) is plugged on the mainboard of control end (2), and the connection terminal of terminal box (302) is connected through data line with the input end of data collecting card (301);
Described automatic load-on module (4) comprises stepper motor driver (401), stepper motor (402) and line slideway (403); The input end of stepper motor driver (401) is connected through cable with terminal box (302); The output terminal of stepper motor driver (401) is connected through cable with the input end of stepper motor (402), and the PTO of stepper motor (402) is connected with leading screw in the line slideway (403) through shaft coupling;
Described anti-extrusion performance proving installation (5) comprises graduated tube (501), first backlight (502), annular seal space (503), transparent hose (504), pressure unit (505), water tank (506), first T-valve (507), second T-valve (508) and medical irrigator (509); Baffle plate on the mobile platform of the push rod of medical irrigator (509) and line slideway (403) is relative; The outlet of medical irrigator (509) is connected with first valve port of first T-valve (507); Second valve port of first T-valve (507) is connected with first valve port of second T-valve (508); The 3rd valve port of first T-valve (507) is connected with the water delivering orifice of water tank (506); Second valve port of second T-valve (508) is communicated with the cavity of annular seal space (503); The 3rd valve port of second T-valve (508) is connected with the pressure interface port of pressure unit (505); Transparent hose (504) is fixed in the annular seal space (503), and transparent hose (504) is in horizontality, and the bottom of graduated tube (501) is communicated with the inner chamber of transparent hose (504) through pipeline; First backlight (502) and video camera (101) lay respectively at the both sides of annular seal space (503), and transparent hose (504) is positioned at the range of exposures of first backlight (502).
2. according to the testing apparatus of the described intravascular stent mechanical property of claim 1, it is characterized in that, also comprise the 3rd T-valve (6) and spreading performance proving installation (7),
Described spreading performance proving installation (7) comprises second backlight (701), first foley's tube (702) and airtight cavity (703); First foley's tube (702) is fixed in the airtight cavity (703); Second backlight (701) and video camera (101) lay respectively at the both sides of airtight cavity (703), and first foley's tube (702) is positioned at the range of exposures of second backlight (701);
Described the 3rd T-valve (6) is positioned between second T-valve (508) and the annular seal space (503); And second valve port of second T-valve (508) is connected with first valve port of the 3rd T-valve (6); Second valve port of the 3rd T-valve (6) is communicated with the cavity of annular seal space (503), and the 3rd valve port of the 3rd T-valve (6) is communicated with first foley's tube (702).
3. according to the testing apparatus of the described intravascular stent mechanical property of claim 1; It is characterized in that; Also comprise compliance proving installation (8); This compliance proving installation (8) comprises drill chuck (801), first Micro-force sensor (802) and translation stage (803); First Micro-force sensor (802) is fixed on the mobile platform of line slideway (403), and drill chuck (801) is fixed on the end face of translation stage (803), and translation stage (803) is positioned at the coverage of video camera (101).
4. according to the testing apparatus of the described intravascular stent mechanical property of claim 1; It is characterized in that; Also comprise removing force test device (9), this removes force test device (9) and comprises second Micro-force sensor (901), pad (902) and second foley's tube (903), and Micro-force sensor (901) is fixed on the mobile platform of line slideway (403); Be provided with seal wire in the inner chamber of second foley's tube (903); And the two ends of seal wire are positioned at second foley's tube (903) outside, and pad (902) is provided with through hole, and second foley's tube (903) interts in the through hole of pad (902).
5. according to the testing apparatus of the described intravascular stent mechanical property of claim 1; It is characterized in that; Also comprise and remove force test device (9); This removes force test device (9) and comprises second Micro-force sensor (901), second foley's tube (903), adhesive tape (904) and locating rack (905); Second Micro-force sensor (901) is fixed on the mobile platform of line slideway (403), is provided with seal wire in the inner chamber of second foley's tube (903), and the two ends of seal wire are positioned at second foley's tube (903) outside; Intravascular stent is pressed the outside surface that is held in second foley's tube (903), and intravascular stent is bonded on the locating rack (905) through adhesive tape (904).
6. according to the testing apparatus of the described intravascular stent mechanical property of claim 1; It is characterized in that; Also comprise and carry property testing device (10); This conveying property testing device (10) comprises the 3rd Micro-force sensor (1001), the 3rd foley's tube (1002), the 4th Micro-force sensor (1003), vascular pattern (1004) and fixed station; Be provided with crooked through hole in the vascular pattern (1004); The 3rd Micro-force sensor (1001) is fixed on the mobile platform of line slideway (403), and is positioned at sustained height with vascular pattern (1004), and vascular pattern (1004) and the 4th Micro-force sensor (1003) are separately fixed on the fixed station; The outlet of the through hole of the block of the 4th Micro-force sensor (1003) and vascular pattern (1004) one sides is relative, and the 4th Micro-force sensor (1003) and vascular pattern (1004) are in sustained height; The 3rd foley's tube (1002) is interspersed in the through hole of vascular pattern (1004).
7. according to the testing apparatus of the described intravascular stent mechanical property of claim 1; It is characterized in that described annular seal space (503) comprises that cavity (5031), first end cap (5032), middle part are first fixed bar (5033) of through hole, second fixed bar (5034) and second end cap (5035) that the middle part is blind hole; The xsect of cavity (5031) is square; First end cap (5032) and second end cap (5035) are separately fixed at the end face of cavity (5031); And between first end cap (5032) and the cavity (5031), and be equipped with O-ring seal (5036) between second end cap (5035) and the cavity (5031); First fixed bar (5033) is interspersed to be fixed on first end cap (5032), and is provided with O-ring seal between first fixed bar (5033) and first end cap (5032); Second fixed bar (5034) is interspersed to be fixed on second end cap (5035), and is provided with O-ring seal between second fixed bar (5034) and second end cap (5035).
8. according to the testing apparatus of the described intravascular stent mechanical property of claim 7, it is characterized in that described first fixed bar (5033) and second fixed bar (5034) all are positioned on the axis of cavity (5031).
9. according to the testing apparatus of the described intravascular stent mechanical property of claim 7, it is characterized in that the cavity (5031) of described annular seal space (503) is processed by organic glass.
10. according to the testing apparatus of any one described intravascular stent mechanical property in the claim 1 to 9, it is characterized in that also comprise two contact-making switches (404), two contact-making switches (404) are installed on the two ends of line slideway (403).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220237677 CN202614543U (en) | 2012-05-24 | 2012-05-24 | Testing equipment of intravascular stent mechanical property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220237677 CN202614543U (en) | 2012-05-24 | 2012-05-24 | Testing equipment of intravascular stent mechanical property |
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| Publication Number | Publication Date |
|---|---|
| CN202614543U true CN202614543U (en) | 2012-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220237677 Withdrawn - After Issue CN202614543U (en) | 2012-05-24 | 2012-05-24 | Testing equipment of intravascular stent mechanical property |
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| CN (1) | CN202614543U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680267A (en) * | 2012-05-24 | 2012-09-19 | 东南大学 | Testing equipment for mechanical property of intravascular stents |
| CN103091089A (en) * | 2013-01-09 | 2013-05-08 | 深圳市计量质量检测研究院 | Controllable type medical equipment handle loading testing machine |
| CN108801761A (en) * | 2018-04-28 | 2018-11-13 | 河南威浦仕医疗科技有限公司 | Foley's tube air pressure precompressed puncture resistance device for detecting performance |
| CN108827791A (en) * | 2018-04-28 | 2018-11-16 | 河南威浦仕医疗科技有限公司 | Foley's tube preload pressure test device |
-
2012
- 2012-05-24 CN CN 201220237677 patent/CN202614543U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680267A (en) * | 2012-05-24 | 2012-09-19 | 东南大学 | Testing equipment for mechanical property of intravascular stents |
| CN102680267B (en) * | 2012-05-24 | 2014-09-10 | 东南大学 | Testing equipment for mechanical property of intravascular stents |
| CN103091089A (en) * | 2013-01-09 | 2013-05-08 | 深圳市计量质量检测研究院 | Controllable type medical equipment handle loading testing machine |
| CN103091089B (en) * | 2013-01-09 | 2015-09-23 | 深圳市计量质量检测研究院 | Controllable type medical equipment handle loading tester |
| CN108801761A (en) * | 2018-04-28 | 2018-11-13 | 河南威浦仕医疗科技有限公司 | Foley's tube air pressure precompressed puncture resistance device for detecting performance |
| CN108827791A (en) * | 2018-04-28 | 2018-11-16 | 河南威浦仕医疗科技有限公司 | Foley's tube preload pressure test device |
| CN108827791B (en) * | 2018-04-28 | 2020-10-02 | 河南威浦仕医疗科技有限公司 | Sacculus pipe pre-compaction pressure testing arrangement |
| CN108801761B (en) * | 2018-04-28 | 2020-11-13 | 浙江国信房地产营销策划有限公司 | Balloon catheter air pressure pre-pressing puncture resistance detection device |
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Granted publication date: 20121219 Effective date of abandoning: 20140910 |
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