CN204694453U - Medical self-expanding non-vascular orifice bracket fatigue characteristic testing device - Google Patents
Medical self-expanding non-vascular orifice bracket fatigue characteristic testing device Download PDFInfo
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- CN204694453U CN204694453U CN201420811685.3U CN201420811685U CN204694453U CN 204694453 U CN204694453 U CN 204694453U CN 201420811685 U CN201420811685 U CN 201420811685U CN 204694453 U CN204694453 U CN 204694453U
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- pressure head
- web joint
- slide bar
- testing device
- fatigue characteristic
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Abstract
The utility model provides a kind of medical self-expanding non-vascular orifice bracket fatigue characteristic testing device, and comprise sensing device and actuating unit, described sensing device is for measuring the duty of actuating unit; Described actuating unit comprises drive part, running part and end contact part, and described drive part comprises the buncher, speed reduction unit and the built-up crankshaft that connect successively, the slide bar pair that described running part comprises connecting rod and is connected with connecting rod one end; The secondary other end of described slide bar is connected to web joint, and described web joint connects end contact part, the mobile pressure head that end contact part comprises constant temperature water bath, is connected with web joint, and with the fixing pressure head of mobile pressure head adaptation; Described mobile pressure head and fixing pressure head are positioned at constant temperature water bath; Built-up crankshaft, in rotary course, periodically promotes connecting rod, makes the secondary to-and-fro movement of slide bar.
Description
Technical field
The utility model relates to a kind of medicine equipment, particularly a kind of medical self-expanding non-vascular orifice bracket fatigue characteristic testing device.
Background technology
For the most patient occurring tumour or other pathologies in the non-vascular cavities such as esophagus, enteron aisle, biliary tract, getting up early symptom is also not obvious, often lose the chance of surgical radical treatment when finding late, actively palliative treatment has been taked for this kind of patient, contact cavity obstruction, it is made to recover unimpeded, be most important remedy measures, at present, stent endoprosthesis is for the quality of life improving patient, extending the life of patient, is a kind of palliative therapy method preferably.
To the various Self-expanded stents for body cavities, its function is the optimum or malignant stricture tube chamber that expansion causes because of pathology or wound, , as esophagus, biliary tract, enteron aisle and blood vessel etc., large than target cavity of the diameter of this support, compress and put into induction system, be transported to the release of lesion locations place, support self-expands into preset diameters, after stenter to implant human body, produce the radial expansion force of continuous infusions, act on cavity inwall, narrow positions is progressively expanded and recovers unobstructed, because Self-expanded stent generally has super-elasticity, the wriggling of cavity can be obedient to, thus keep cavity unobstructed again without too many sense of discomfort, support is as implant long-term in body, it will inevitably be subject to the continuous action of environment, as acid or alkali environment, periodicity and acyclic load effect, the special state etc. of body lumen, in order to evaluate the security of support product, its fatigue lifetime must be considered.
Study the specific internal milieu must considered its fatigue lifetime residing for support, intravascular stent due to its operating mode relatively simple, individual difference is little, and it is a lot of also very detailed for the research of the function reached required for intravascular stent and effect suffered after implanting, U.S. FDA has made the standard of torture test, wherein explicitly call for the correlativity of time in the method for testing of its torture test and its external time and body, but to other self expandable orifice brackets, due to the complicacy that diversity and the cavity of stent size are wriggled, still not relevant unified standard or testing apparatus, experiment in vitro self expandable orifice bracket being carried out to fatigue lifetime is again the necessary means ensureing that the safe and reliable work of non-vessel stent and follow-up optimization relate to, therefore be necessary to the fatigue property test of self expandable orifice bracket.The torture test of intravascular stent should comprise the experiment in vitro of 400,000,000 cycles (being equivalent to 10 years), and mostly is late malignant tumour when needing the patient implanting self expandable orifice bracket to be found in body, and survival period is short.The peristaltic wave cycle of different cavity is different, therefore can not determine unified fatigue period, therefore mainly determines its peristaltic wave number of times born to the fatigue property test of self expandable orifice bracket, i.e. the fatigue period of support at present.
Utility model content
Utility model object: technical problem to be solved in the utility model is for the deficiencies in the prior art, provides a kind of medical self-expanding non-vascular orifice bracket fatigue characteristic testing device.
In order to solve the problems of the technologies described above, the utility model discloses a kind of medical self-expanding non-vascular orifice bracket fatigue characteristic testing device, comprise sensing device and actuating unit, described sensing device is for measuring the duty of actuating unit; Described actuating unit comprises drive part, running part and end contact part, and described drive part comprises the buncher, speed reduction unit and the built-up crankshaft that connect successively, the slide bar pair that described running part comprises connecting rod and is connected with connecting rod one end; The secondary other end of described slide bar is connected to web joint, and described web joint connects end contact part, the mobile pressure head that end contact part comprises constant temperature water bath, is connected with web joint, and with the fixing pressure head of mobile pressure head adaptation; Described mobile pressure head and fixing pressure head are positioned at constant temperature water bath;
Built-up crankshaft, in rotary course, periodically promotes connecting rod, makes the secondary to-and-fro movement of slide bar.
In the utility model, described mobile pressure head is one group of spaced semicircular ring, is provided with the recess with described spaced semicircular ring adaptation in described fixing pressure head.
In the utility model, described fixing pressure head and mobile pressure head are removable semicircular ring.
In the utility model, described sensing device comprises the spin counter for measuring buncher, and is arranged on the pressure transducer between slide bar pair and web joint.
In the utility model, described slide bar secondary with web joint junction higher than the junction of mobile pressure head and web joint.
In the utility model, in water bath, can simulated body fluid be put, as simulated gastric fluid, model bile, simulated body fluid etc., so just more can feed back actual condition.
Beneficial effect: this stent fatigue performance testing device, tested support is fixed by pressure head, simulation cavity is to the long-duration load effect of support, annular radial systolic pressure is applied to support, motor drives the compound cam mechanism of relative misalignment certain angle to simulate the compacted dynamic load effect of the periodicity of cavity to support by speed reduction unit, and this device is suitable for the fatigue property test of multiple diameter scope support.
Accompanying drawing explanation
To do the utility model below in conjunction with the drawings and specific embodiments and further illustrate, above-mentioned or otherwise advantage of the present utility model will become apparent.
Fig. 1 is the structural representation of the utility model actuating unit.
Embodiment
Below in conjunction with accompanying drawing, the utility model is elaborated.
As shown in Figure 1, the utility model comprises sensing device and actuating unit, and described sensing device is for measuring the duty of actuating unit, actuating unit comprises drive part 1, running part 2, end contact part 3 and tested support 10, wherein, drive part 1 comprises the buncher 4 connected successively, speed reduction unit 5 and built-up crankshaft 6, running part 2 comprises connecting rod 7, connecting rod 7 one end connects built-up crankshaft 6, the other end connects slide bar pair 8, secondary 8 ends of slide bar are provided with pressure transducer 13, rear end access web joint 9, mobile pressure head 12 is connected bottom web joint 9 opposite side, , end contact part 3 comprises constant temperature water bath 14, the mobile pressure head 12 be connected with web joint, with the fixing pressure head 11 of mobile pressure head 12 adaptation, fixing pressure head 11 is semi-circular shape structure with mobile pressure head 12 and fixing pressure head 11 is provided with the recess with mobile pressure head 12 adaptation, when built-up crankshaft 6 rotates, can by connecting rod 7, the promotion of slide bar secondary 8 and web joint 9, mobile pressure head 12 is advanced in the recess of fixing pressure head 11.
The end contact part of this stent fatigue performance testing device is made up of one group of paired pressure head arranged in parallel, and pressure head can change coupling according to the support of different size, and simulation cavity is to the long-term annular radial systolic pressure of support.Drive part comprises built-up crankshaft, buncher and speed reduction unit, and the camshaft that built-up crankshaft is made up of the cam that a group is axially staggered certain angle mutually along support and corresponding push rod form.Pressure transducer arranged by each push rod.By design cam contour and mutual phase place, can realize simulating any wriggling rule load.The elastic property of change on support of temperature has appreciable impact, for ensureing the fatigue behaviour of accurate test bracket, end contact part is placed in constant temperature water bath, and temperature accuracy can reach ± and 0.5 DEG C.
In the utility model, surface is with the symmetric double semi arch indenter device of silicon rubber and the design of thermostat water bath, and that can simulate non-vascular cavity and support to greatest extent contacts situation; Symmetrical two semi arch indenter devices, can be applicable to the support of different size.Also by changing two semi arch indenter devices of different radii, make with the matching of support higher.
In water bath, can simulated body fluid be put, as simulated gastric fluid, model bile, simulated body fluid etc., so just more can feed back actual condition.
The utility model in use, by the relative deflection angle of the independent bent axle unit of setting, thus can change compression movement rule, to adapt to the wriggling rule of different non-vascular cavity.Also can in same blood vessel cavity, by changing compression movement rule, to investigate different wriggling rule to the impact of support.
The utility model provides a kind of medical self-expanding non-vascular orifice bracket fatigue characteristic testing device; the method and access of this technical scheme of specific implementation is a lot; the above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.The all available prior art of each ingredient not clear and definite in the present embodiment is realized.
Claims (5)
1. a medical self-expanding non-vascular orifice bracket fatigue characteristic testing device, it is characterized in that, comprise sensing device and actuating unit, described sensing device is for measuring the duty of actuating unit;
Described actuating unit comprises drive part (1), running part (2) and end contact part (3), described drive part (1) comprises the buncher (4), speed reduction unit (5) and the built-up crankshaft (6) that connect successively, the slide bar pair (8) that described running part (2) comprises connecting rod (7) and is connected with connecting rod (7) one end; Described slide bar pair (8) other end is connected to web joint (9), described web joint (9) connects end contact part (3), the mobile pressure head (12) that end contact part (3) comprises constant temperature water bath (14), is connected with web joint (9), and the fixing pressure head (11) adaptive with mobile pressure head (12); Described mobile pressure head (12) and fixing pressure head (11) are positioned at constant temperature water bath (14);
Built-up crankshaft (6), in rotary course, periodically promotes connecting rod (7), makes slide bar pair (8) to-and-fro movement.
2. one according to claim 1 medical self-expanding non-vascular orifice bracket fatigue characteristic testing device, it is characterized in that, described mobile pressure head (12) is one group of spaced semicircular ring, is provided with the recess with described spaced semicircular ring adaptation in described fixing pressure head (11).
3. one according to claim 1 medical self-expanding non-vascular orifice bracket fatigue characteristic testing device, is characterized in that, described fixing pressure head (11) and mobile pressure head (12) are removable semicircular ring.
4. one according to claim 1 medical self-expanding non-vascular orifice bracket fatigue characteristic testing device, it is characterized in that, described sensing device comprises the spin counter for measuring buncher (4), and is arranged on the pressure transducer (13) between slide bar pair (8) and web joint (9).
5. one according to claim 1 medical self-expanding non-vascular orifice bracket fatigue characteristic testing device, it is characterized in that, described slide bar pair (8) and web joint (9) junction are higher than the junction of mobile pressure head (12) with web joint (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420811685.3U CN204694453U (en) | 2014-12-18 | 2014-12-18 | Medical self-expanding non-vascular orifice bracket fatigue characteristic testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420811685.3U CN204694453U (en) | 2014-12-18 | 2014-12-18 | Medical self-expanding non-vascular orifice bracket fatigue characteristic testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204694453U true CN204694453U (en) | 2015-10-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420811685.3U Withdrawn - After Issue CN204694453U (en) | 2014-12-18 | 2014-12-18 | Medical self-expanding non-vascular orifice bracket fatigue characteristic testing device |
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| Country | Link |
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| CN (1) | CN204694453U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502085A (en) * | 2014-12-18 | 2015-04-08 | 南京微创医学科技有限公司 | Testing device for fatigue property of medical self-expanding non-vascular lumen stent |
-
2014
- 2014-12-18 CN CN201420811685.3U patent/CN204694453U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502085A (en) * | 2014-12-18 | 2015-04-08 | 南京微创医学科技有限公司 | Testing device for fatigue property of medical self-expanding non-vascular lumen stent |
| CN104502085B (en) * | 2014-12-18 | 2017-03-22 | 南京微创医学科技股份有限公司 | Testing device for fatigue property of medical self-expanding non-vascular lumen stent |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 210061 hi tech Industrial Development Zone, Pukou District, Jiangsu, hi tech Road, No. three, No. 10, No. Patentee after: MICRO-TECH (NANJING) CO., LTD. Address before: 210061 hi tech Industrial Development Zone, Pukou District, Jiangsu, hi tech Road, No. three, No. 10, No. Patentee before: Nanjing Micro-Tech Co., Ltd. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20151007 Effective date of abandoning: 20170406 |
|
| AV01 | Patent right actively abandoned |