CN202859730U - Elasticity shape memory recyclable bracket - Google Patents
Elasticity shape memory recyclable bracket Download PDFInfo
- Publication number
- CN202859730U CN202859730U CN 201220471453 CN201220471453U CN202859730U CN 202859730 U CN202859730 U CN 202859730U CN 201220471453 CN201220471453 CN 201220471453 CN 201220471453 U CN201220471453 U CN 201220471453U CN 202859730 U CN202859730 U CN 202859730U
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- shape memory
- bracket
- support
- recyclable
- utility
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Abstract
The utility model discloses an elasticity shape memory recyclable bracket. The elasticity shape memory recyclable bracket is a tubular bracket which is manufactured from 80-100 parts of elasticity shape memory polymer materials and 0-20 parts of biocompatibility micro powder according to weight part, wherein the original shape, at a temperature higher than a shape memory temperature, of the bracket is a folded starlike bracket. The bracket disclosed by the utility model is made of polymer materials with biocompatibility and/or biodegradability and is small in tissue stimulation; compared with a metal bracket, the bracket is simple in manufacturing process and low in cost; and in addition, by coating a therapeutic medicine on the surface of the bracket, the therapeutic effect can be further enhanced.
Description
Technical field
This utility model relates to medical apparatus and instruments, particularly a kind of elastic shape memory recoverable support.
Background technology
In the lysises such as treatment air flue organic stenosis, esophageal carcinoma, bladder/carcinoma of prostate, the vivo implantation type stent applications is extensive.The implantation of many situation lower carriages is temporary clinically, and along with the treatment of primary lesion, alleviating of narrow positions chocking-up degree needs to reclaim support.
Existing vivo implantation type support mainly is to make of materials such as rustless steels, NiTi alloy, and these supports have all utilized the super-elasticity of timbering material or supporting structure basically, and support itself can self-expanding, but can not self-constriction.The process that support is implanted is it to be compressed in the conduit first substantially, is transported to diseased region in the body, remove the conduit releasing bracket after, support begins to expand.In order to prevent the support phenomenon that is moved, support must have enough rigidity, it is discharged after and surrounding tissue close contact and not yielding.Yet the result of design is like this, in many disease treatment processes that only need interim implant frame (for example, the microtubular of optimum stenosis of colon is got involved and treatment), is difficult to support is taken out after treatment is finished, and namely support reclaims difficulty.This has become existing common defective of implanted support.Therefore, limited to a certain extent the clinical practice of vivo implantation type support.The body interior conduit that particularly causes for benign lesion narrow uses more to be restricted.
In addition, no matter present employed vivo implantation type support is metal rack or polymer support, and major part all is braiding structure, aspect the growth higher incidence rate is arranged in tissue.
Polyurethane is a kind of very promising shape memory polymer material, and its shape memory temperature can be regulated in-30 ℃～70 ℃ scopes as required.Because it has preferably mechanical characteristic and biocompatibility, therefore also can be used for the making that body is implanted into medical apparatus and instruments simultaneously.At present, not yet see the report of making recoverable support in the body of shape memory polymer material.
The utility model content
The purpose of this utility model, the problems referred to above that exist in order to solve prior art exactly provide a kind of elastic shape memory recoverable support.
To achieve these goals, this utility model has adopted following technical scheme: a kind of elastic shape memory recoverable support, be the circular tube shaped support that the biocompatibility micropowder by the elastic shape memory polymer material of 80-100 weight portion and 0-20 weight portion is made, it is folding star-shaped support in the original state that is higher than under the shape memory temperature.
Described recoverable support outer surface is coated with one deck curative drug.
Elastic shape memory recoverable support of the present utility model owing to adopted above technical scheme, makes it compared with prior art, has following advantage and beneficial effect:
1, elastic shape memory recoverable support of the present utility model, it is made material and has biocompatibility and/or biological degradability, and is little to tissue stimulation.
2, after support implants, when disease alleviates or treats the taking-up of end needs, can realize by suitable environmental stimuli the automatic contraction of support, its volume be reduced, thereby be convenient in body, take out.
3, recoverable support overall structure of the present utility model is circular tube shaped, has avoided ordinary stent to adopt braiding structure to cause organizing the defective of interior growth.
4, by at the stent surface coated curative drug, further intensive treatment effect also.
5, recoverable support of the present utility model adopts polymeric material, and for metal rack, its processing technology is simple, and is with low cost, but decrease patient's medical treatment burden.
Description of drawings
Structural representation when Fig. 1 is elastic shape memory recoverable support duty of the present utility model;
Fig. 2 is that the elastic shape memory recoverable support is at the original state structural representation that is higher than under the shape memory temperature;
Fig. 3 puts into shape behind the star-shaped support with the sacculus of unaerated;
Fig. 4 makes star-shaped support be expanded to tubulose by the inflation mode;
Fig. 5 is the state after support implants;
Fig. 6 is after being heated to shape memory temperature, and the elastic shape memory recoverable support reverts to the star-shaped support original state.
The specific embodiment
Below in conjunction with the drawings and specific embodiments this utility model is elaborated.
Elastic shape memory recoverable support of the present utility model is the circular tube shaped support 1 that the biocompatibility micropowder by the elastic shape memory polymer material of 80-100 weight portion and 0-20 weight portion is made as shown in Figure 1.It is higher than under the shape memory temperature original state as shown in Figure 2, be folding star-shaped support 11.
Recoverable support outer surface of the present utility model can be coated with one deck curative drug.
The manufacture method of elastic shape memory recoverable support of the present utility model and using method can be described as follows by following embodiment:
Processing a star mould, is that 39 ℃ polyurethane particles is put into mould with glass transition temperature (being the shape memory recovery temperature), is being higher than extrusion forming under the temperature of its fusing point, makes star-shaped support 11 after the demoulding, as shown in Figure 2.
Under the temperature that is higher than 15 ℃ of its glass transition temperatures, the mode (referring to Fig. 3) that expands by sacculus 2 makes star-shaped support 11 be expanded to circular tube shaped support 1 (referring to Fig. 4), then is cooled to room temperature, and then support will remain circular tube shaped, as shown in Figure 1.
After the sterilization of circular tube shaped support, the vacuum drying sealing is for subsequent use.
Utilize in use the elasticity of polyurethane that the circular tube shaped support is compressed in the conduit, be transported to diseased region 3 in the body, remove conduit, then this support 1 will strut in the form of diseased region with tubulose by elastically-deformable recovery, as shown in Figure 5.
After patient's disease alleviates or treats end, when needing to take out tubular bracket, utilize the saline after sterilizing that it is heated.When temperature reaches 39 ℃ (being the shape memory recovery temperature), this tubular bracket will revert to initial star-shaped support 11 by shape memory effect, as shown in Figure 6, and owing to volume reduces, so be convenient to take out.
Process a star mould.
With magnetic Fe
3O
4It is in 39 ℃ the polyurethane solutions that micropowder evenly is blended into glass transition temperature (being the shape memory recovery temperature) by sonic oscillation, Fe
3O
4The percentage by weight of micropowder and polyurethane is 5: 95.
Above-mentioned mixed liquor is poured in the mould, be heated to 80 ℃ and make its curing molding, make after the demoulding and contain Fe
3O
4The star-shaped support 11 of micropowder.
Under the temperature that is higher than 15 ℃ of polyurethane glass transition temperatures, the mode by inflation makes and contains Fe
3O
4The star-shaped support of micropowder is expanded to tubulose, then is cooled to room temperature, and then support will remain tubulose.
To contain Fe
3O
4After the tubular bracket sterilization of micropowder, the vacuum drying sealing is for subsequent use.
Utilize in use the elasticity of polyurethane will contain Fe
3O
4The tubular bracket of micropowder is compressed in the conduit, is transported to diseased region in the body, removes conduit, and then this support will strut in the form of diseased region with tubulose by elastically-deformable recovery.
After patient's disease alleviates or treats end, need to take out and contain Fe
3O
4During the support of micropowder, can outside patient body, apply an oscillating magnetic field, utilize magnetic induction that it is heated.When temperature reaches 39 ℃ (being the shape memory recovery temperature), this tubular bracket will return to its initial star by shape memory effect, owing to volume reduces, so be convenient to take out.
Claims (2)
1. elastic shape memory recoverable support is characterized in that: be the circular tube shaped support, it is folding star-shaped support in the original state that is higher than under the shape memory temperature.
2. elastic shape memory recoverable support as claimed in claim 1, it is characterized in that: described recoverable support outer surface is coated with one deck curative drug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220471453 CN202859730U (en) | 2012-09-14 | 2012-09-14 | Elasticity shape memory recyclable bracket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220471453 CN202859730U (en) | 2012-09-14 | 2012-09-14 | Elasticity shape memory recyclable bracket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202859730U true CN202859730U (en) | 2013-04-10 |
Family
ID=48026493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220471453 Expired - Fee Related CN202859730U (en) | 2012-09-14 | 2012-09-14 | Elasticity shape memory recyclable bracket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202859730U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116725750A (en) * | 2023-07-14 | 2023-09-12 | 广州医科大学附属第一医院（广州呼吸中心） | Tracheal stent |
-
2012
- 2012-09-14 CN CN 201220471453 patent/CN202859730U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116725750A (en) * | 2023-07-14 | 2023-09-12 | 广州医科大学附属第一医院（广州呼吸中心） | Tracheal stent |
| CN116725750B (en) * | 2023-07-14 | 2024-02-02 | 广州医科大学附属第一医院（广州呼吸中心） | Tracheal stent |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20150914 |
|
| EXPY | Termination of patent right or utility model |