CN100491964C - Device for testing antiwear performance of evaluating artificial blood vessel of inner cavity insulation and its test method - Google Patents
Device for testing antiwear performance of evaluating artificial blood vessel of inner cavity insulation and its test method Download PDFInfo
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- CN100491964C CN100491964C CNB2005101106362A CN200510110636A CN100491964C CN 100491964 C CN100491964 C CN 100491964C CN B2005101106362 A CNB2005101106362 A CN B2005101106362A CN 200510110636 A CN200510110636 A CN 200510110636A CN 100491964 C CN100491964 C CN 100491964C
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Abstract
The present invention provides a testing device and a testing method for evaluating the wear resistance of the artificial blood vessel used for isolation in the cavity, which belongs the field of textA device for testing wear-resistance property of artificial blood vessel used for intracavity isolation consists of motor, box, crank cam, oscillating bearing on left and right rod end, link, sliding ile tests. The testing device comprises a motor, a box body, a crank cam, a left rod end joint bearing, a right rod end joint bearing, a connecting rod, a sliding block with screw holes, a T-shaped rublock with screw hole, T-form friction frame with screw hole, metal friction rod with external thread, top and bottom fixing nut, left and right test sample support, test sample holder, weight and frebbing frame with screw holes, a metal rubbing rod with external screw threads, an upper fixed screw nut, a lower fixed screw nut, a left sample support frame, a right sample support frame, a specimen quency transformer. A method for testing wear-resistance property of said blood vessel is also disclosed. holder, weights and a frequency changer. By means of the testing method of the present invention and the combination of the disclosed testing device and the testing method thereof for the water permeability of the textile type artificial blood vessel, the actual wearing condition of the artificial blood vessel used for isolation in the cavity of a human body can be simulated up to the limit and the wear resistance of the artificial blood vessel used for isolation in the cavity can be scientifically evaluated.
Description
Technical field:
The invention belongs to the textile testing field, it relates to a kind of proving installation and method of testing of estimating inner cavity insulation with the artificial blood vessel abrasion resistance properties.
Background technology:
Along with the raising of Chinese economic development and living standards of the people, the incidence of disease of the vascular disorder (as abdominal aneurvsm AAA) that is caused with " rich man's diseases " such as hypertension, diabetes and artery sclerosis constantly rises.Various vascular disorders have become a big killer of human health.Over year, artificial blood vessel is widely used in fields such as vascular tumor, wound, Organ Reconstruction surplus in the of nearly 40.
Abdominal aneurvsm is long tumour on the blood vessel major trunk roads of heart lower end, be the highest a kind of of the incidence of disease in the asrteriectasia disease, one section spherical in shape or fusiform dilatation of abdominal aorta, generally surpassing 6cm just needs excision, and its main harm is can break suddenly to cause rapid massive haemorrhage death.Traditional operation need be opened the patient abdominal cavity, and otch reaches 30～40cm, and wound is big, and complication is many, recovers slow, and because the vascular diseases pilosity is born in the elderly, and its physique is relatively poor, opens chest or the abdominal risk is bigger.
The development of modern interventional radiology, material science and endoluminal vascular surgical technic makes the minimally-invasive treatment of abdominal aneurvsm become possibility.Endovascular graft is to cut patient's femoral artery or carry out femoral artery puncture under the numb situation in part, import inner cavity insulation with artificial blood vessel (inner cavity insulation is made of metal support and artificial blood vessel with artificial blood vessel), inner cavity insulation is fixed on the normal arterial wall of knurl body two ends with artificial blood vessel, blood flow is isolated with the knurl chamber with passing through in the artificial blood vessel from inner cavity insulation, thereby the artery blood flow that has been expected to eradicate high speed and high pressure impacts the future trouble that the knurl wall causes the knurl body to break.
Inner cavity insulation is bearing acid, the alkali of periodically pulsing stress and periphery, the stress of enzyme environment in vivo with artificial blood vessel, use in the use of artificial blood vessel at inner cavity insulation, the damage of the artificial blood vessel that the various countries scholar has reported has blood vessel mechanical damage, the frictionally damage on surface and the chemical damage of polyster fibre.The various countries researchist mainly sends in the patient body 9～12 months inner cavity insulation artificial blood vessel by what scanning electron microscopic observation reclaimed in the body, find that inner cavity insulation has occurred fatigue damage in various degree with artificial blood vessel at different parts, the woven structure that comprises blood vessel fiber and the metal support contact site sutural fracture between crack, metal support and the artificial blood vessel on slight crack, the artificial blood vessel length direction of wearing and tearing.Inner cavity insulation will cause the artificial blood vessel life-span in vivo to be difficult to reach the requirement of expection with these damages of artificial blood vessel, therefore to the damage of inner cavity insulation with artificial blood vessel, especially the research of rub resistance is very necessary, but both at home and abroad the research of this respect is not appeared in the newspapers with regard to present data of consulting.Meaning of the present invention just is that at international standard ISO25539-1 be on the basis of reference, provides the testing in vitro means of a kind of inner cavity insulation with the abrasion resistance properties of artificial blood vessel, with the prediction of its mechanics abrasion resistance properties of preliminary realization.
Inner cavity insulation is different from the artificial blood vessel of replacing usefulness with the characteristics of artificial blood vessel, and the special requirement artificial blood vessel must be controlled certain thickness, generally is no more than 0.12mm.The woven method production of general employing also can be adopted the film that contains micropore, as ultra-thin teflon, polyurethane film etc.Simultaneously, in order to guarantee blood vessel seepage does not take place when implanting, must the strict permeability of controlling fabric.
Inner cavity insulation is meant that with the abrasion resistance properties of artificial blood vessel vascular wall bears the ability of metal support repeated friction, and the friction of fiber and textile structural variation are the immediate causes that causes inner cavity insulation to lose efficacy with the artificial blood vessel isolation performance, (according to having mentioned the permanance of artificial blood vessel in the integrality of the inner cavity insulation among the international standard ISO25539-1 with artificial blood vessel, and the failure mode of mentioning artificial blood vessel in the permanance of inner cavity insulation with artificial blood vessel is mainly the rubbing wear of artificial blood vessel and the crack after the artificial blood vessel friction) is so intend characterizing its abrasion resistance properties with inner cavity insulation with the variation of artificial blood pipe friction back plane water permeability.The plane water permeability is meant that under the 120mmHg static pressure (when adopting the infiltration water cubing, unit is ml/cm through the discharge on the sample unit area in the unit interval
2/ min).The big or small measurable artificial blood vessel of the plane water permeability numerical value of the artificial blood vessel after the friction uses the length of life cycle after implantation, be the important characteristic index of inner cavity insulation with artificial blood vessel product testing in vitro.
Consult through domestic and international patent documentation, do not find any being applicable to carry out the proving installation of inner cavity insulation with the abrasion resistance properties of artificial blood vessel, and for the friction instrument of general fabric, can not be used for the test of inner cavity insulation with artificial blood vessel, this is because at first common fabric friction instrument is friction between two fabrics that carry out, rather than the friction between metal and the fabric; Secondly common fabric friction instrument needs the sample of large-size when test, and this is to be difficult to satisfy for the inner cavity insulation artificial blood vessel, and inner cavity insulation is generally less with the artificial blood vessel caliber, can not provide common fabric friction instrument required sample; Also have the mode of motion of common fabric friction instrument also not meet inner cavity insulation is subjected to the friction of metal support in vivo with artificial blood vessel mode of motion.
Summary of the invention:
The invention provides a kind of proving installation and method of testing of estimating inner cavity insulation with the abrasion resistance properties of artificial blood vessel at the problems referred to above, new design has been set up in anthropomorphic dummy's body cavity isolated with the repeated friction that produces between artificial blood vessel and the metal support, by the sample after the friction test is carried out the measurement of water permeation performance, estimate the abrasion resistance properties of inner cavity insulation again with artificial blood vessel.
The technical scheme of technical solution problem of the present invention is as follows:
A kind of proving installation of estimating inner cavity insulation with the artificial blood vessel abrasion resistance properties is characterized in that it comprises the motor 1 that is packed on the box bottom 21, be placed on the casing 2 on the worktable, be packed in the crank cam 3 on the motor 1 end axle, the left spherical plain bearing rod end 4 that had not only linked to each other but also linked to each other with connecting rod 5 with crank cam 3, the right spherical plain bearing rod end 4 ' that had not only linked to each other but also linked to each other with band screw slide block 6 with connecting rod 5, two ends are all with left, right spherical plain bearing rod end 4,4 ' the connecting rod 5 that links to each other, not only linked to each other but also be placed in band screw slide block 6 on header board 23 guide rails of band guide rail with right spherical plain bearing rod end 4 ', the band screw T shape friction frame 7 that links to each other with band screw slide block 6, screw in band screw T shape friction frame 7 again with last, following hold-down nut 9,9 ' link to each other be with externally threaded metal friction bar 8, not only with link to each other with externally threaded metal friction bar 8 but also link to each other with band screw T shape friction frame 7 on, following hold-down nut 9,9 ', be supported on the left side on the header board 23 of being with guide rail, right sample support frame 10,10 ', be clamped in the specimen holder 11 on the sample F, be suspended on the counterweight 12 on the specimen holder 11 and link to each other with motor 1 and be packed in frequency converter 13 on the box side 22 by lead.
The material selection aluminium alloy of described casing 2; The material selection aluminium alloy or the stainless steel of the header board 23 of crank cam 3 and band guide rail; The material selection stainless steel of connecting rod 5; The material selection copper of band screw slide block 6; The material selection aluminium alloy of band screw T shape friction frame 7.
Described a kind of method of testing of estimating inner cavity insulation with the proving installation of artificial blood vessel abrasion resistance properties is characterized in that this method of testing realizes as follows:
(1) before test, at first checks connecting rod 5 and left and right spherical plain bearing rod end 4,4 ' and band screw slide block 6 and the header board 23 of being with guide rail between state, if any the motion underaction, before beginning to test, in time refuel and adjust the error that produces rotating speed when avoiding the instrument motion;
(2) make sample (F), the length of sample F generally is cut into 6～12cm, for length during less than 6cm, and the physical length of getting artificial blood vessel; The radial development width of sample F is cut into 3～4cm, during less than 3cm, gets actual radial development width for the radial development width of sample F;
(3) will be with externally threaded metal friction bar 8 backspins to depress horizon sample F is 5～10mm, uses upper and lower hold-down nut 9,9 ' will be with externally threaded metal friction bar 8 stationkeeping afterwards;
(4) will cut out good sample F left end is clipped on the left sample support frame 10, then with the right-hand member of sample F by supporting with the bottom of externally threaded metal friction bar 8 and by right sample support frame 10 ', the sample F that will stretch out with specimen holder 11 clamps then, be that 500g～850g counterweight 12 hangs on the specimen holder 11 again with weight, finish the fixing of sample F;
(5) energized, open frequency converter 13, regulate frequency, the frequency adjustable adjusting range is 30Hz～50Hz, begin sample F is carried out wear-resistant test, test duration is 25～60 minutes, its friction traverse with externally threaded metal friction bar 8 is 4～10cm, after the schedule time, take off sample F, with under the conditional parameter, minimum 5 sample F are carried out wear-resistant test respectively, and then the China Patent No. that adopts the inventor to invent is that 03129179.1 patent of invention is carried out the test of the corresponding number of times of water infiltration capacity, distinguish record test data, calculate the mean value of minimum 5 sample F water infiltration capacity test datas at last, contrast artificial blood vessel water infiltration capacity 300～400ml/cm that medical circle is generally acknowledged again
2/ min is to estimate inner cavity insulation artificial blood vessel abrasion resistance properties.
Advantage compared with prior art of the present invention is:
The present invention is in conjunction with disclosed Weave type artificial blood vessel water permeability proving installation and method of testing thereof, isolated actual wear situation with artificial blood vessel in anthropomorphic dummy's body cavity can more scientifically be estimated the abrasion resistance properties of inner cavity insulation with artificial blood vessel to greatest extent.
Description of drawings:
Fig. 1 is the proving installation synoptic diagram of inner cavity insulation of the present invention with the artificial blood vessel abrasion resistance properties
Among Fig. 1,1-motor, 2-casing, 21-box bottom, 22-box side, the header board of 23-band guide rail, 3-crank cam, 4,4 '-left and right spherical plain bearing rod end, 5-connecting rod, 6-band screw slide block, 7-band screw T shape friction frame, 8-be with externally threaded metal friction bar, 9,9 '-upper and lower hold-down nut, 10,10 '-left and right sample support frame, 11-specimen holder, 12-counterweight, 13-frequency converter, F-sample.
Embodiment:
The proving installation of inner cavity insulation usefulness artificial blood vessel abrasion resistance properties of the present invention as shown in Figure 1, whole device is by motor 1, casing 2, crank cam 3, a left side, right spherical plain bearing rod end 4,4 ', connecting rod 5, band screw slide block 6, band screw T shape friction frame 7, be with externally threaded metal friction bar 8, on, following hold-down nut 9,9 ', a left side, right sample support frame 10,10 ', specimen holder 11, counterweight 12, frequency converter 13 are formed jointly.
Motor 1 is contained on the box bottom 21 of casing 2, crank cam 3 is packed in the end axle of motor 1, left side spherical plain bearing rod end 4 links to each other with crank cam 3, left and right spherical plain bearing rod end 4,4 ' links to each other with connecting rod 5, connecting rod 5 links to each other with band screw slide block 6 by right spherical plain bearing rod end 4 ', connecting rod 5 is under the transmission of motor 1 and crank cam 3, it is reciprocating in the guide rail of the header board 23 of band guide rail to drive band screw slide block 6, be with externally threaded metal friction bar 8 reciprocating by band screw T shape friction frame 7 again, test sample F is carried out abrasion resistance properties.
The repeated friction of utilizing existing frequency converter 13 can guarantee that sample F is subjected in test process keeps constant speed, and can adjust testing required frequency.The height that presses down horizon sample F with externally threaded metal friction bar 8 in the device can be regulated according to testing scheme, and then changes with the contact pressure of externally threaded metal friction bar 8 with sample F, can be by counterweight 12 adjustings to sample weight that F adds in the test.
Band screw slide block 6 places the guide rail of the header board 23 of band guide rail to horizontally slip in the device, and utilize screw and band screw T shape friction frame 7 to link to each other in the front, be with externally threaded metal friction bar 8 to screw in band screw T shape friction frame 7 the place ahead screws, after the position of depressing horizon sample F with externally threaded metal friction bar 7 is determined, adopt upper and lower hold-down nut 9, fix about in the of 9 ' and be with externally threaded metal friction bar 8, adopt upper and lower hold-down nut 9, about in the of 9 ' the externally threaded metal friction bar 8 of fixed band can guarantee the test constant highly all the time.
Fix by left sample support frame 10 cutting out good sample F left end, 10 fens left sides of sample support frame, right sample support frame 10,10 ', a left side, right sample support frame 10,10 ' is placed on the header board 23 of band guide rail, the position is below band screw slide block 6, length according to sample F can be regulated a left side by the track on the header board 23 of band guide rail, right sample support frame 10,10 ' spacing, its spacing will meet the test needs of friction traverse 4～10cm, wherein left sample support frame 10 adopts not the concave-convex clip designs with spring, right sample support frame 10 ' adopts the smooth sway brace design of no chuck, again with the right-hand member of sample F by bottom with externally threaded metal friction bar 8, and by right sample support frame 10 ' support, the specimen holder 11 that is connected with counterweight 12 is clipped on the sample F, specimen holder 11 adopts not the concave-convex clip designs with spring again.
The material selection aluminium alloy of casing 2; The material selection aluminium alloy or the stainless steel of the header board 23 of crank cam 3 and band guide rail; The material selection stainless steel of connecting rod 5; The material selection copper of band screw slide block 6; The material selection aluminium alloy of band screw T shape friction frame 7.
Set frequency and open frequency converter 13, begin to test, by control with externally threaded metal friction bar 8 depress sample F height, add the size of counterweight 12 and time that friction takes place reaches different friction effects, water permeability test after rubbing is then estimated the abrasion resistance properties of inner cavity insulation with artificial blood vessel by more permeable amount.
Further test method of the present invention is set forth as follows:
Described a kind of inner cavity insulation method of testing of the proving installation of artificial blood vessel abrasion resistance properties is characterized in that this method of testing realizes as follows:
(1) before test, at first checks connecting rod 5 and left and right spherical plain bearing rod end 4,4 ' and band screw slide block 6 and the header board 23 of being with guide rail between state, if any the motion underaction, before beginning to test, in time refuel and adjust the error that produces rotating speed when avoiding the instrument motion;
(2) make sample (F), the length of sample F generally is cut into 6～12cm, for length during less than 6cm, and the physical length of getting artificial blood vessel; The radial development width of sample F generally is cut into 3～4cm, during less than 3cm, gets actual radial development width for the radial development width of sample F;
(3) will be with externally threaded metal friction bar 8 backspins to depress horizon sample F is 5～10mm, uses upper and lower hold-down nut 9,9 ' will be with externally threaded metal friction bar 8 stationkeeping afterwards;
(4) will cut out good sample F left end is clipped on the left sample support frame 10, then with the right-hand member of sample F by supporting with the bottom of externally threaded metal friction bar 8 and by right sample support frame 10 ', the sample F that will stretch out with specimen holder 11 clamps then, be that 500g～850g counterweight 12 hangs on the specimen holder 11 again with weight, finish the fixing of sample F;
(5) energized, open frequency converter 13, regulate frequency, the frequency adjustable adjusting range is 30Hz～50Hz, begin sample F is carried out wear-resistant test, test duration is 25～60 minutes, its friction traverse with externally threaded metal friction bar 8 is 4～10cm, after the schedule time, take off sample F, with under the conditional parameter, minimum 5 sample F are carried out wear-resistant test respectively, and then the China Patent No. that adopts the inventor to invent is that 03129179.1 denomination of invention is that the patent of invention of Weave type artificial blood vessel water permeability proving installation and method of testing thereof is carried out the test of the corresponding number of times of water infiltration capacity, distinguish record test data, calculate the mean value of minimum 5 sample F water infiltration capacity test datas at last, contrast artificial blood vessel water infiltration capacity 300～400ml/cm that medical circle is generally acknowledged again
2/ min is to estimate inner cavity insulation artificial blood vessel abrasion resistance properties.
Embodiment 1:
As follows to inner cavity insulation with the concrete operations step that artificial blood vessel carries out the abrasion resistance properties test:
(1) before test, at first checks connecting rod 5 and left and right spherical plain bearing rod end 4,4 ' and band screw slide block 6 and the header board 23 of being with guide rail between state, if any the motion underaction, before beginning to test, in time refuel and adjust the error that produces rotating speed when avoiding the instrument motion;
(2) will be 1000/10cm through, filling density, thickness is that the woven plain cloth of 0.08mm is made sample F, and the length of sample F is cut into 6cm, and the radial development width of sample F is cut into 3cm;
(3) will be with externally threaded metal friction bar 8 backspins to depress horizon sample F is 5mm, uses upper and lower hold-down nut 9,9 ' will be with externally threaded metal friction bar 8 stationkeeping afterwards;
(4) will cut out good sample F left end is clipped on the left sample support frame 10, then with the right-hand member of sample F by supporting with the bottom of externally threaded metal friction bar 8 and by right sample support frame 10 ', the sample F that will stretch out with specimen holder 11 clamps then, be that 500g counterweight 12 hangs on the specimen holder 11 again with weight, finish the fixing of sample F;
(5) energized, open frequency converter 13, regulate frequency, frequency adopts 30Hz, begin sample F is carried out wear-resistant test, test duration is 30 minutes, its friction traverse with externally threaded metal friction bar 8 is 5cm, after the schedule time, take off sample F, with under the conditional parameter, 5 sample F are carried out wear-resistant test respectively, and then the China Patent No. that adopts the inventor to invent is that 03129179.1 patent of invention is carried out the test of the corresponding number of times of water infiltration capacity, the difference record test data, the mean value that calculates 5 sample F water infiltration capacity test datas at last is 769.3ml/cm
2/ min.
From above-mentioned test result as can be known, its test number is much larger than the generally acknowledged artificial blood vessel water infiltration capacity 300～400ml/cm of medical circle
2/ min so inner cavity insulation can not reach the abrasion resistance properties requirement with the artificial blood vessel sample, is not useable for the patient.
Embodiment 2:
Its testing procedure that carries out wear-resistant test is identical with embodiment 1, different are (1) will through close be 1400/10cm, filling density is 1300/10cm, thickness be the woven twill sample F of 0.09mm to be made into length be 9cm, the radial development width is 3.5cm, (2) will be with externally threaded metal friction bar 8 backspins to depress horizon sample F is 8mm, (3) counterweight weight is 650g, (4) adopting frequency is 40Hz, and (5) test duration is 50 minutes, and (6) friction traverse is 8cm;
The mean value that calculates 5 sample F water infiltration capacity test datas at last is 265.7ml/cm
2/ min, artificial blood vessel water infiltration capacity 300～400ml/cm that its test data is generally acknowledged less than medical circle
2/ min, 300～400ml/cm
2/ min has the advantages of good abrasion performance, can be used safely in the patient.
Embodiment 3:
Its testing procedure that carries out wear-resistant test is identical with embodiment 1, different are (1) will through close be 1700/10cm, filling density is 1500/10cm, thickness be the woven twill sample F of 0.10mm to be made into length be 12cm, the radial development width is 4cm, (2) will be with externally threaded metal friction bar 8 backspins to depress horizon sample F is 10mm, (3) counterweight weight is 800g, (4) adopting frequency is 50Hz, and (5) test duration is 60 minutes, and (6) friction traverse is 10cm;
The mean value that calculates 5 sample F water infiltration capacity test datas at last is 286.4ml/cm
2/ min, artificial blood vessel water infiltration capacity 300～400ml/cm that its test data is generally acknowledged less than medical circle
2/ min has the advantages of good abrasion performance, can be used safely in the patient.
By the foregoing description as can be seen the present invention can more scientifically estimate with the durability of artificial blood vessel inner cavity insulation.
Claims (3)
1, a kind of proving installation of estimating inner cavity insulation with the artificial blood vessel abrasion resistance properties is characterized in that it comprises the motor (1) that is packed on the box bottom (21), be placed on the casing (2) on the worktable, be packed in the crank cam (3) on motor (1) the end axle, the left spherical plain bearing rod end (4) that had not only linked to each other but also linked to each other with connecting rod (5) with crank cam (3), the right spherical plain bearing rod end (4 ') that had not only linked to each other but also linked to each other with band screw slide block (6) with connecting rod (5), two ends are all with left, right spherical plain bearing rod end (4,4 ') connecting rod of Xiang Lianing (5), not only linked to each other but also be placed in band screw slide block (6) on header board (23) guide rail of band guide rail with right spherical plain bearing rod end (4 '), the band screw T shape friction frame (7) that links to each other with band screw slide block (6), screw in band screw T shape friction frame (7) again with last, following hold-down nut (9, what 9 ') link to each other is with externally threaded metal friction bar (8), not only with link to each other with externally threaded metal friction bar (8) but also link to each other with band screw T shape friction frame (7) on, following hold-down nut (9,9 '), be supported on the left side on the header board (23) of being with guide rail, right sample support frame (10,10 '), be clamped in the specimen holder (11) on the sample (F), be suspended on the counterweight (12) on the specimen holder (11) and link to each other with motor (1) and be packed in frequency converter (13) on the box side (22) by lead.
2, evaluation inner cavity insulation according to claim 1 is characterized in that the material selection aluminium alloy of described casing (2) with the proving installation of artificial blood vessel abrasion resistance properties; The material selection aluminium alloy or the stainless steel of the header board (23) of crank cam (3) and band guide rail; The material selection stainless steel of connecting rod (5); The material selection copper of band screw slide block (6); The material selection aluminium alloy of band screw T shape friction frame (7).
3, a kind of method of testing of estimating inner cavity insulation with the proving installation of artificial blood vessel abrasion resistance properties according to claim 1 and 2 is characterized in that this method of testing realizes as follows:
(1) before test, at first checks connecting rod (5) and left and right spherical plain bearing rod end (4,4 ') and the state between band screw slide block (6) and the header board (23) of being with guide rail, if any the motion underaction, before beginning to test, in time refuel and adjust the error that produces rotating speed when avoiding the instrument motion;
(2) make sample (F), the length of sample (F) is cut into 6～12cm, for length during less than 6cm, and the physical length of getting artificial blood vessel; The radial development width of sample (F) is cut into 3～4cm, during less than 3cm, gets actual radial development width for the radial development width of sample (F);
(3) will be with externally threaded metal friction bar (8) backspin to depress horizon sample (F) is 5～10mm, uses upper and lower hold-down nut (9,9 ') will be with externally threaded metal friction bar (8) stationkeeping afterwards;
(4) will cut out good sample (F) left end is clipped on the left sample support frame (10), then with the right-hand member of sample (F) by supporting with the bottom of externally threaded metal friction bar (8) and by right sample support frame (10 '), the sample (F) of using specimen holder (11) to stretch out then clamps, be that 500g～850g counterweight (12) hangs on the specimen holder (11) again with weight, finish the fixing of sample (F);
(5) energized, open frequency converter (13), regulate frequency, the frequency adjustable adjusting range is 30Hz～50Hz, begin sample (F) is carried out wear-resistant test, test duration is 25～60 minutes, and its friction traverse with externally threaded metal friction bar (8) is 4～10cm, takes off sample (F) after the schedule time, with under the conditional parameter, minimum 5 samples (F) are carried out wear-resistant test respectively, and cutting the length of side at every sample (F) medium position then is that the square sample of 1.5～2.5cm is done the test of water infiltration capacity, and these 5 square samples are placed on the existing Weave type artificial blood vessel water permeability proving installation successively, test, every sample testing once, its test data mean value is W, unit is ml, test duration is T, unit is min, and the test useful area is A, and unit is cm
2, by formula (A * T) calculates the artificial blood vessel water infiltration capacity S of every sample to S=W/, and unit is ml/cm
2/ min gets the mean value of 5 samples at last, contrasts artificial blood vessel water infiltration capacity 300～400ml/cm that medical circle is generally acknowledged again
2/ min is to estimate inner cavity insulation artificial blood vessel abrasion resistance properties.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101106362A CN100491964C (en) | 2005-11-23 | 2005-11-23 | Device for testing antiwear performance of evaluating artificial blood vessel of inner cavity insulation and its test method |
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| CNB2005101106362A CN100491964C (en) | 2005-11-23 | 2005-11-23 | Device for testing antiwear performance of evaluating artificial blood vessel of inner cavity insulation and its test method |
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| CN1793830A CN1793830A (en) | 2006-06-28 |
| CN100491964C true CN100491964C (en) | 2009-05-27 |
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| CN102175541B (en) * | 2011-03-01 | 2013-04-03 | 东华大学 | Device and method for testing fatigue and ageing of artificial blood vessel through in-vitro bending simulation |
| CN102346128B (en) * | 2011-07-08 | 2013-01-02 | 西安交通大学 | Method for testing surface friction performance of living vascular endothelial cell |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374459A (en) * | 2018-09-06 | 2019-02-22 | 东华大学 | A kind of orthopaedics suture dynamic bending friction performance testing device and method |
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