CN1186615C - Textile type artificial blood vessel water permeability test equipment and its testing method - Google Patents
Textile type artificial blood vessel water permeability test equipment and its testing method Download PDFInfo
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- CN1186615C CN1186615C CNB031291791A CN03129179A CN1186615C CN 1186615 C CN1186615 C CN 1186615C CN B031291791 A CNB031291791 A CN B031291791A CN 03129179 A CN03129179 A CN 03129179A CN 1186615 C CN1186615 C CN 1186615C
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Abstract
The present invention provides a testing device and a testing method thereof of the water permeability of the textile type artificial blood vessels, which belongs to the field of textile testing instruments. The testing device comprises a water tank, a water supply pipe, a water return pipe, a metal hose, an organic glass pipe, a testing valve door, a specimen holder with holes, a permeating water receiver, T-shaped joints and a pressure meter. The testing device and the testing method disclosed by the present invention can scientifically test and evaluate the water permeability of the textile type artificial blood vessels with the diameter range of 6 to 34 mms at the constant pressure of 120 mmHg all the time according to the testing standards of the artificial blood vessels.
Description
Technical field:
The invention belongs to the textile testing instrument field, it relates to a kind of Weave type artificial blood vessel water permeability proving installation and method of testing thereof.
Background technology:
The perviousness of artificial blood vessel is meant that tube wall sees through the ability of certain liquid, generally characterize with water permeability, be divided into two characteristic indexs, one is the plane water permeability, be meant under the 120mmHg static pressure, (when adopting the infiltration water cubing, unit is ml/cm through the discharge on the sample unit area in unit interval
2/ min, when adopting the infiltration water weight measurement, unit is g/cm
2/ min), another is whole water permeability, is meant under the 120mmHg static pressure, sees through the discharge of whole artificial blood tube wall or its representative pipeline section in the unit interval, unit is the same.After perviousness has reflected that artificial blood vessel implants, especially just the anti-permeability performance of back tube wall to blood implanted, whether the size decision artificial blood vessel of its numerical value needs pre-coagulating to handle before implantation, and whether complication such as hemotoncus easily takes place after implanting, be an important characteristic index of artificial blood vessel product testing in vitro.
Chinese patent application number is CN90200280, and denomination of invention is for having introduced a kind of device of test fabric water permeability in the utility model patent of " test fabric water permeability device ", and structural drawing as shown in Figure 1.Primary structure comprises water tank 1, test valve 7, specimen with holes clamper 8, regulating tank 13, blowdown pipe 14.Water tank 1 is airtight, regulating tank 13 airtight and relatively water tank 1 move up and down, logical atmosphere on the blowdown pipe 14 of insertion regulating tank 13, the lower end is goed deep into below the water surface, the bottom of water tank 1 communicates by the bottom of pipeline with specimen with holes clamper 8, and the upper and lower of regulating tank 13 is connected with the upper and lower of water tank 1 respectively by flexible pipe.Principle of work is to open test valve 7, the water of water tank 1 is entered the bottom of specimen with holes clamper 8 by pipeline, under the pressure differential effect of sample upper and lower surface, by overflowing by specimen with holes clamper 8 tops after the fabric sample, inflow is equipped with in the flow monitoring tube of liquid level detection head, and when liquid level rose to certain altitude, circuit was connected between gauge head, output signal starts timer and provides the result by digital indicator.
This test fabric water permeability device is on the one hand because the fabric sample useful area of its test is 100cm
2, be not suitable for diameter range in the test of 6mm to the artificial blood vessel of 34mm; Its test pressure does not reach the 120mmHg of artificial blood vessel testing standard on the other hand; In addition we think this from bottom to top go out the stream mode, structure is complicated, current have some setbacks, and are not suitable for the water permeability test of current Weave type artificial blood vessel.
Simultaneously through the foreign patent Literature Consult, retrieve a small amount of relevant infiltrative testing tool of fabric water, as having introduced a kind of instrument of testing the porous sheet material water permeability among the USP4880499, also introduced a kind of instrument of taking textile water permeability under certain water pressure that is used to test among the DE19650968, but these two kinds of instruments fail to consider the useful area of fabric sample clamping device and the 120mmHg pressure two aspect basic demands of standard, thereby do not find any device that carries out Weave type artificial blood vessel water permeability test that is applicable to, so we have manufactured and designed the water permeability proving installation of Weave type artificial blood vessel and corresponding test method are provided according to the requirement of the testing permeability index in the artificial blood vessel international standard.
Summary of the invention:
Problem and retrieval situation at above-mentioned existence, the invention provides a kind of Weave type artificial blood vessel water permeability proving installation and method of testing thereof, the device of new design has satisfied the water permeation performance of scientifically testing Weave type artificial blood vessel on the basis of simulation human body 120mmHg blood pressure, and test index meets the requirement of artificial blood vessel international standard.
The technical scheme of technical solution problem of the present invention is as follows:
A kind of Weave type artificial blood vessel water permeability proving installation, it comprises water tank 1, upper hose 2, return pipe 3, metal hose 4, plexi-glass tubular 5, test valve 7, specimen with holes clamper 8, infiltration water receiver 9, it is characterized in that it comprises that also top links to each other with plexi-glass tubular 5, the middle part links to each other with pressure gauge 10, bottom and test valve 7 T junction 6 that links to each other and link to each other, the pressure gauge 10 that the lower end links to each other with T junction 6 with specimen with holes clamper 8; Described specimen with holes clamper 8 comprises that the upper end links to each other with T shape pipe 6 by external thread, and the lower end links to each other with holder 82 down with holes by external thread, has the holder 81 of going up with holes in uniform four holes on the lower surface; Inner side end links to each other interior lower surface and the 3rd O-ring seal 84 with holes by internal thread and the holder 81 of going up with holes " the with holes time holder 82 that links to each other; The upper surface links to each other with the holder 81 of going up with holes by uniform four cylinders, interior middle end face and second O-ring seal 84 with holes ' link to each other lower surface and the 3rd O-ring seal 84 " keeper with holes 83 that links to each other with holes; The upper surface links to each other with the holder 81 of going up with holes, first O-ring seal 84 with holes of lower surface and second O-ring seal 84 with holes ' link to each other; The upper surface links to each other with first O-ring seal with holes, 84 lower surfaces, second O-ring seal 84 with holes that the lower surface links to each other with middle end face in the keeper 83 with holes '; The upper surface links to each other with keeper 83 with holes, the 3rd O-ring seal 84 with holes that the lower surface links to each other with middle end face in the holder 82 down with holes ";
Described water tank 1 is square, and material adopts organic glass; The material of described specimen with holes clamper (8) adopts organic glass, aluminium alloy, stainless steel; Uniform four cylinders and keeper with holes 83 are processed into integral type or split type on the described keeper with holes 83;
The method of testing of described a kind of Weave type artificial blood vessel water permeability proving installation is characterized in that testing procedure is as follows:
(1) before test, at first check three O- ring seals 84,84 ', 84 " state,, before beginning test, in time change increase test error when avoiding test to change if any damage midway;
(2) make test sample, sample is cut into square, and the length of side is 1.5～2.5cm;
(3) open upper hose valve 21, make water enter among the last pool I of water tank 1 by upper hose 2, by perforated plate 11 and enter workspace II, when workspace II is full of, water begins to backwater zone III overflow, forms recirculated water, observes the pointer on the pressure gauge 10 then, when pressure reaches indicated value 16.0Kpa, can begin test;
(4) screw off down holder 82 with holes and with second O-ring seal 84 with holes ', keeper 83 with holes, the 3rd O-ring seal 84 with holes " three connects together and takes off; open test valve 7 and discharge water; remove ducted bubble; close test valve 7, can be on holes sees meniscus below first O-ring seal 84 with holes of holder 81 bottoms;
(5) will cut out good sample lie in second O-ring seal 84 with holes ' on, then insert in four holes of upward holder 81 with holes by four cylinders on the keeper 83 with holes, and make second O-ring seal 84 with holes that the three links to each other ', keeper with holes 83 and the 3rd O-ring seal 84 with holes " reset; then holder 82 down with holes is tightened on holes going up on the holder 81, finish sample holder;
(6) open test valve 7, waited for for 10～15 seconds, begin test after making waterflow stabilization, the test duration is 1～10 minute;
(7) the water infiltration capacity in the test duration is tested record test data;
(8) same sample minimum carry out 5 times the test, calculate test data mean value at last;
(9) can calculate Weave type artificial blood vessel water permeability S by test data mean value through following formula:
W is a test data mean value in the formula
T is the test duration
A is the test useful area, can be by formula
Calculate, wherein sample testing
Diameter d=0.9cm
Result of calculation is when adopting the cubing of infiltration water, and unit is ml/cm
2/ min; Adopt the electronics sky
During the weight measurement of flat weighing infiltration water, unit is g/cm
2/ min.
Advantage compared with prior art of the present invention is:
In test process, remain the constant pressure of the 120mmHg (being equivalent to 1.632 meter water columns) of artificial blood vessel testing standard, effective clamping area of sample is less, is applicable to test and the evaluation of diameter range at the Weave type artificial blood vessel water permeation performance of 6～34mm.
Description of drawings:
Fig. 1 is existing test fabric water permeability device synoptic diagram
Among Fig. 1, the 1-water tank, 7-tests valve, 8-specimen with holes clamper, the 13-regulating tank,
The 14-blowdown pipe;
Fig. 2 is a Weave type artificial blood vessel water permeability proving installation synoptic diagram of the present invention
Among Fig. 2, the 1-water tank, the 11-perforated plate, the 12-imperforate plate, the last pool of I-, the II-workspace,
The III-backwater zone, the 2-upper hose, 21-upper hose valve, the 3-return pipe,
The 4-metal hose, the 5-plexi-glass tubular, 6-T shape joint, 7-tests valve,
8-specimen with holes clamper, 9-infiltration water receiver, 10-pressure gauge;
Fig. 3 is the diagrammatic cross-section of specimen with holes clamper 8 of the present invention
Among Fig. 3,8-specimen with holes clamper, the 81-holder of going up with holes, 82-holder down with holes,
83-keeper with holes, 84-first O-ring seal with holes, 84 '-second O-ring seal with holes,
84 " the 3rd O-ring seal with holes.
Embodiment:
Weave type artificial blood vessel water permeability proving installation of the present invention as shown in Figure 2, whole device is made up of water tank 1, upper hose 2, return pipe 3, metal hose 4, plexi-glass tubular 5, T junction 6, test valve 7, specimen with holes clamper 8, infiltration water receiver 9 and pressure gauge 10.Utilize the recirculated water of top water tank 1, guarantee that the test pressure of sample in test process keeps constant, and can utilize 10 pairs of pressure of pressure gauge to detect.Metal hose 4 has certain pliability, be convenient to move up and down plexi-glass tubular 5, move up and down the distance of the sample clip position in the specimen with holes clamper 8 of water surface site in the adjustable positions water-saving box 1 of plexi-glass tubular 5, thereby adjusting test pressure, the pressure gauge that T junction 6 middle parts are connected can be U-tube manometer, single column manometer or capsule pressure gauge, can intuitively reflect test pressure.
Specimen with holes clamper 8 is connected on the test valve 7, test valve 7 links to each other with T junction 6, open test valve 7, water flows to specimen with holes clamper 8 by water tank 1, and the effect of specimen with holes clamper 8 is stable holding artificial blood vessel samples, guarantees that water passes through from sample Validity Test area, can not leak, the specimen with holes clamper has infiltration water receiver 98 times, collects the water that penetrates in the certain hour, can employing amount volume or the method for weighing measure the water permeability of artificial blood vessel fabric.
The structure of designed water tank 1 as shown in Figure 2, observation for ease of water level, the material of water tank 1 adopts indeformable transparent material, as organic glass, water tank 1 is processed into square box, water tank 1 integral body is divided into pool I, workspace II and backwater zone III three parts, last pool I and workspace II are separated by perforated plate 11, workspace II and backwater zone III are separated by imperforate plate 12, test front opening upper hose valve 21, make water enter pool I, enter workspace II through the eyelet on the perforated plate 11 again, after being in the water process perforated plate 11 under the turbulence state among the feasible upward pool I, change more stable laminar condition into, liquid level is stable among the assurance workspace II, minimizing is because of the pressure surge of the water influence to test result, when the water level of workspace II is higher than imperforate plate 12, water overflows imperforate plate 12 and enters backwater zone III, reflux through return pipe 3, form recirculated water, in test process, the flow of last water is all the time greater than the water yield that is appeared by sample, unnecessary water refluxes through backwater zone III, and the height that can guarantee liquid level in the water tank can be with not the carrying out and reduce of test process, thereby guarantees the stable of test pressure in the test process;
The structure of designed specimen with holes clamper 8 as shown in Figure 3, material can adopt organic glass, aluminium alloy, the material that stainless steel etc. can not get rusty, the design adopts transparent pmma material, be convenient to observe the state of water in the specimen holder 8 with holes, specimen with holes clamper 8 is mainly by the holder 81 of going up with holes, holder 82 down with holes, keeper 83 with holes and O-ring seal with holes 84,84 ', 84 " four parts are formed; there is external thread holder 81 upper ends of going up with holes; so that be connected with T junction 6; lower end is an external thread; so that match with holder 82 down with holes; holder 81 bottom surfaces of going up with holes also have equally distributed four holes, the one side of joining with upward holder 81 with holes on the keeper 83 with holes has equally distributed four cylinders, can match with four holes of going up holder 81 with holes, be beneficial to stable holding to sample, the 3rd O-ring seal 84 with holes is housed in the bottom of keeper 83 with holes "; overflow between keeper 83 with holes and down holder 82 with holes to prevent water; another effect of four cylinders on the keeper 83 with holes is when the artificial blood vessel test of carrying out rippleization; four angles of sample are fixed on the cylinder; make sample open and flat; form reasonably effectively area of passage, sample be loaded on first O-ring seal 84 with holes and second O-ring seal 84 with holes ' between, treat sample with second O-ring seal 84 with holes ' and keeper 83 with holes and the 3rd O-ring seal 84 with holes " three with four cylinders on the keeper 83 with holes insert reset in four holes of going up holders 81 with holes after; again holder 82 down with holes is tightened on holes going up on the holder 81; sample is by two O- ring seals 84 and 84 up and down ' clamp; the 3rd O-ring seal 84 with holes that holder 82 jam-packeds link to each other with keeper 83 with holes under simultaneously with holes ", thereby water stream channel in the middle of forming in the whole specimen holder with holes 8, current flow in the infiltration water receiver 9 through behind the sample with certain Validity Test area by first O-ring seal 84 with holes and second O-ring seal 84 with holes ' decision during test.
The test of Weave type artificial blood vessel water permeability can be adopted the volume of infiltration water in measuring unit's time, or adopts the weight of electronic balance weighing infiltration water.
Method of testing of the present invention is set forth as follows:
In order to guarantee precision of test result, when test, should follow certain working rule and requirement, at first Ce Shi water source requires pure inclusion-free, prevents the test result that impurity makes the mistake to the obstruction of sample hole, so preferably use pure water, recycle, water after the test can be put back in the water source again, cuts the waste, or installs water purification installation additional in the exit of tap water, make tap water reach the requirement of test, the step of concrete method of testing is as follows:
(1) before test, at first check three O- ring seals 84,84 ', 84 " state,, before beginning test, in time change increase test error when avoiding test to change if any damage midway;
(2) make test sample, sample is cut into square, and the length of side is 1.5～2.5cm;
(3) open upper hose valve 21, make water enter among the last pool I of water tank 1 by upper hose 2, by perforated plate 11 and enter workspace II, when workspace II is full of water, beginning forms recirculated water to backwater zone III overflow, observes the pointer on the pressure gauge 10 then, when pressure reaches indicated value 16.0KPa (120mmHg), can begin test;
(4) screw off down holder 82 with holes and and will second O-ring seal 84 with holes ', keeper with holes 83, the 3rd O-ring seal 84 with holes " three connects together and takes off; open test valve 7 and discharge water; remove ducted bubble; close and test valve 7, can be on holes sees meniscus below first O-ring seal 84 with holes of holder 81 bottoms;
(5) will cut out good sample lie in second O-ring seal 84 with holes ' on, then insert in four holes of upward holder 81 with holes by four cylinders on the keeper 83 with holes, and make second O-ring seal 84 with holes that the three links to each other ', keeper with holes 83 and the 3rd O-ring seal 84 with holes " reset; then holder 82 down with holes is tightened on holes going up on the holder 81, finish sample holder;
(6) open test valve 7, waited for for 10～15 seconds, begin test after making waterflow stabilization, the test duration is 1～10 minute;
(7) the water infiltration capacity in the test duration is tested record test data;
(8) same sample minimum carry out 5 times the test, calculate test data mean value at last;
(9) can calculate the water permeability S of Weave type artificial blood vessel through following formula by test data mean value:
W is the mean value of test data in the formula
T is the test duration
A is the test useful area, can be by formula
Calculate, wherein sample testing
Diameter d=0.9cm
Result of calculation is when adopting the cubing of infiltration water, and unit is ml/cm
2/ min; Adopt
During the weight measurement of sub-balance weighing infiltration water, unit is g/cm
2/ min.
Utilize described Weave type artificial blood vessel water permeability proving installation, by above-mentioned method of testing, can be under the constant pressure of 120mmHg, be that the water permeability of the Weave type artificial blood vessel of 6mm～34mm carries out test and the evaluation than science to diameter range, for artificial blood vessel design and develop and use provides reference data, semi-manufacture to each process segment of artificial blood vessel are tested, can help to select suitable processing technology, the artificial blood vessel finished product is tested, can implant performance evaluation to artificial blood vessel, it is generally acknowledged that the water permeability of working as artificial blood vessel is greater than 600ml/cm
2During/min, before the artificial blood vessel implant into body, must use patient's self-blood that artificial blood vessel is coagulated in advance, prevent from after artificial blood vessel from implanting blood leakage to take place.
Claims (3)
1, a kind of Weave type artificial blood vessel water permeability proving installation, it comprises water tank (1), upper hose (2), return pipe (3), metal hose (4), plexi-glass tubular (5), test valve (7), specimen with holes clamper (8), infiltration water receiver (9), it is characterized in that it comprises that also top links to each other with plexi-glass tubular (5), the middle part links to each other with pressure gauge (10), bottom and test valve (7) T junction (6) that links to each other and link to each other, the pressure gauge (10) that the lower end links to each other with T junction (6) with specimen with holes clamper (8);
Described specimen with holes clamper (8) comprises that the upper end links to each other with T junction (6) by external thread, and the lower end links to each other with holder (82) down with holes by external thread, also has the holder (81) of going up with holes in uniform four holes on the lower surface; Inner side end links to each other with the holder (81) of going up with holes by internal thread, interior lower surface and the 3rd O-ring seal with holes (holder (82) down with holes that 84 ") link to each other; The upper surface links to each other with the holder (81) of going up with holes by uniform four cylinders, and interior middle end face links to each other lower surface and the 3rd O-ring seal with holes (keeper with holes (83) that 84 ") link to each other with second O-ring seal with holes (84 '); The upper surface links to each other first O-ring seal with holes (84) that the lower surface links to each other with second O-ring seal with holes (84 ') with the holder (81) of going up with holes; The upper surface links to each other with first O-ring seal with holes (84) lower surface, second O-ring seal with holes (84 ') that the lower surface links to each other with middle end face in the keeper with holes (83); The upper surface links to each other with keeper with holes (83), the 3rd O-ring seal with holes (84 ") that the lower surface links to each other with middle end face in the holder (82) down with holes.
2, Weave type artificial blood vessel water permeability proving installation according to claim 1 is characterized in that described water tank (1) is square, and material adopts organic glass; The material of described specimen with holes clamper (8) adopts organic glass, aluminium alloy, stainless steel; Described keeper with holes (83) is gone up uniform four cylinders and keeper with holes (83) and is processed into integral type or split type.
3, the method for testing of a kind of Weave type artificial blood vessel water permeability proving installation according to claim 1 and 2 is characterized in that the step of this method of testing is as follows:
(1) before test, at first check three O-ring seals (84,84 ', the state of 84 "),, before beginning test, in time change increase test error when avoiding test to change if any damage midway;
(2) make test sample, sample is cut into square, and the length of side is 1.5～2.5cm;
(3) open upper hose valve (21), water is passed through in the last pool (I) that upper hose (2) enters water tank (1), by perforated plate (11) and enter workspace (II), as workspace (II) when being full of, water begins to backwater zone (III) overflow, forms recirculated water, observes the pointer on the pressure gauge (10) then, when pressure reaches indicated value 16.0KPa, can begin test;
(4) screw off holder (82) down with holes also with second O-ring seal with holes (84 '), keeper with holes (83), the 3rd O-ring seal with holes (84 ") threes connect together and take off; open test valve (7) and discharge water; remove ducted bubble; close test valve (7), can see meniscus below first O-ring seal with holes (84) bottom the holder (81) on holes;
(5) will cut out good sample lies on second O-ring seal with holes (84 '), then insert in four holes of upward holder (81) with holes by four cylinders on the keeper with holes (83), and make second O-ring seal with holes (84 '), keeper with holes (83) and the 3rd O-ring seal with holes that the three links to each other (84 ") reset; then holder (82) down with holes is tightened on holes going up on the holder (81), finish sample holder;
(6) open test valve (7), waited for for 10～15 seconds, begin test after making waterflow stabilization, the test duration is 1～10 minute;
(7) the water infiltration capacity in the test duration is tested record test data;
(8) same sample minimum carry out 5 times the test, calculate test data mean value at last;
(9) can calculate Weave type artificial blood vessel water permeability S by test data mean value through following formula:
W is a test data mean value in the formula
T is the test duration
A is the test useful area, can be by formula
Calculate, wherein sample is surveyed
Examination diameter d=0.9cm result of calculation is when adopting the cubing of infiltration water, and unit is ml/cm
2/ min; When adopting the weight measurement of electronic balance weighing infiltration water, unit is g/cm
2/ min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031291791A CN1186615C (en) | 2003-06-12 | 2003-06-12 | Textile type artificial blood vessel water permeability test equipment and its testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031291791A CN1186615C (en) | 2003-06-12 | 2003-06-12 | Textile type artificial blood vessel water permeability test equipment and its testing method |
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| CN1186615C true CN1186615C (en) | 2005-01-26 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101105435B (en) * | 2007-07-13 | 2010-07-28 | 东华大学 | Weave type artificial blood vessel fatigue performance bionic test device and its test method |
| CN105021510B (en) * | 2015-07-16 | 2017-09-19 | 东华大学 | The overall water permeability tester of the controllable artificial blood vessel of pressure and its application method |
| CN105021509B (en) * | 2015-07-16 | 2017-08-01 | 东华大学 | A kind of overall water permeability tester of pulsating artificial blood vessel and its application method |
| CN107328700A (en) * | 2017-07-06 | 2017-11-07 | 南通纺织丝绸产业技术研究院 | A kind of multifunctional artificial Vascular permeability performance test device |
| CN107271348B (en) * | 2017-07-06 | 2019-11-15 | 苏州大学 | A kind of medical artificial pipeline permeance property test macro and its application method |
| CN107748128A (en) * | 2017-11-27 | 2018-03-02 | 郑州大学 | The biomechanical property test device and method of a kind of scaffold for vascular tissue engineering |
| CN108872046A (en) * | 2018-09-13 | 2018-11-23 | 上海瀚海检测技术股份有限公司 | Hose water permeability experimental rig and test method |
| CN109470822B (en) * | 2018-10-24 | 2024-02-06 | 苏州大学 | Device for testing blocking performance of aortic trauma hemostatic material and instrument and evaluation method thereof |
| CN111812011A (en) * | 2020-09-01 | 2020-10-23 | 中国地质科学院 | Suspended solid blocking experiment device |
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