CN202724419U - Composite conduit - Google Patents
Composite conduit Download PDFInfo
- Publication number
- CN202724419U CN202724419U CN 201220322491 CN201220322491U CN202724419U CN 202724419 U CN202724419 U CN 202724419U CN 201220322491 CN201220322491 CN 201220322491 CN 201220322491 U CN201220322491 U CN 201220322491U CN 202724419 U CN202724419 U CN 202724419U
- Authority
- CN
- China
- Prior art keywords
- composite conduit
- mesh grid
- conduit
- spring net
- plastic catheter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a composite conduit which comprises a plastic conduit which is in a round tube shape, a mesh grid and a spring mesh, wherein the mesh grid and the spring mesh are in a round tube shape and placed inside the plastic conduit and sleeved and overlaid together. Compared with a regular plastic conduit, when the composite conduit meets the requirement of the same mechanical property, the wall thickness of the composite conduit can be decreased by a half, the stretch-proof performance, the conveying performance and the control performance of the composite conduit can be greatly improved, so that the safety of the composite conduit can be improved. The distal outer diameter of the composite conduit can be manufactured to be smaller, and a blood vessel can better intervene. Under the same condition, the composite conduit can be pushed to a far and small blood vessel, so that the successful rate of surgery can be improved.
Description
Technical field
This utility model relates to a kind of composite conduit, belongs to the medical apparatus technical field.
Background technology
Medical catheter is to be communicated with the inside and outside tube chamber goods general name of human body, can be made by different materials such as metal, plastics, rubber.Be widely used as path at aspects such as intervene operation, discharge opeing, dispensing, transmission blood, auxiliary other medical apparatus of importing.Conventional interposing catheter be the comparatively soft plastics of quality.Interventional therapy is in operation, if some blood vessel is bending and luminal stenosis relatively, it is very difficult when conventional conduit is advanced distal vessels, often generation catheter proximal end and stage casing bend even fracture, perhaps distal end of catheter knotting, these all be plastic catheter itself axially with high the causing not of mechanical performance radially.If but when adopting the very hard conduit of quality, then can injure blood vessel, tissue or cell.
In recent years, there is a kind of conduit with mesh grid successfully to be used for all kinds of interventional therapys.Its core texture is that metal net that mechanical performance is high embeds in the plastic tube, that is to say that network structure with metal wire knitted is as the interlayer of plastic catheter.Under the identical like this wall thickness condition, all be improved with the conduit of the metal net axially and radially mechanical performance than common plastics conduit.Good axial mechanicalness has improved the stretch-proof performance of conduit, and good radially mechanicalness has improved the fracture resistance of conduit.
But, this conduit with metal net (after this being called for short the braiding conduit) is not perfection yet, when the vascular bending degree is very large, the fracture resistance of this kind conduit just can't meet the demands, in case conduit bends in operation, might the doctor can't finish operation, entail dangers to patients ' lives when serious.
In order to improve the fracture resistance of conduit, adopt the radially compliant that spring structure comes reinforced tube is set in conduit.The conduit of strengthening structure with spring net increases substantially than the fracture resistance of conventional conduit.Yet, the axial mechanical performance of conduit (after this being called for short spring guide) of strengthening structure with spring net is relatively poor, in case distal vessels is narrow and crooked, when withdrawing conduit, often can partly block distal end of catheter, this moment, the strong conduit that withdraws will make conduit elongate drawing-down, so that whole conduit can't continue to use; Relatively to weave conduit soft for spring guide in addition, thereby make the catheter propelling degradation.
The utility model content
Technical problem to be solved in the utility model is the defective that overcomes prior art, and a kind of composite conduit is provided, and improves its fracture resistance, pushes performance, makes its handling better.
For solving the problems of the technologies described above, this utility model provides a kind of composite conduit, it is characterized in that, comprises
The plastic catheter of circular tube shaped is positioned at mesh grid and the spring net of the circular tube shaped that the plastic catheter inner sleeve stacks.
Described mesh grid, spring net form by metal wire knitted.
The length of described mesh grid, spring net is identical with described plastic catheter or be shorter than plastic catheter.
Described spring net runs through the total length of described plastic catheter, in a plastic catheter end wherein, the length that is shorter in length than spring net of described mesh grid.
In the composite conduit, each one of sheathed at least described mesh grid and spring net, or mesh grid wherein or spring net are sheathed a plurality of.
If this composite conduit is used for endoscopic operation, mesh grid or spring net be shorter in length than described plastic catheter, and described plastic catheter far-end is clear, colorless, and position and the trend of other medical apparatus and instruments in the clear judgement distal end of catheter of doctor is convenient in such design.More excellent design is that described plastic catheter far-end has a soft section than near-end softness, and mesh grid or spring net extend into 1 to 2 centimetre of the soft section of far-end, adds powerful thereby the transition region of hard section and soft section played.Clinical practice shows that the transition region of hard section and soft section does not have the conduit of mesh grid or spring net to bend in transition region easily.
Described silk material wiry is circle silk or flat filament.
The diameter of described circle silk, the thickness of flat filament, width are between 5 microns and 1000 microns.
The material of described plastic bushing is nylon, block polyetheramides elastomer, polyurethane or silicone rubber.
The tinsel material of described mesh grid, spring net is tweezer titanium alloy, cochrome or rustless steel, or is pure platinum, true yellow gold, pure tungsten or pure tantalum, or is pure platinum alloy, true yellow billon, pure tungsten alloy or pure tantalum alloy.
The beneficial effect that this utility model reaches:
1) composite conduit of the present invention is compared with the plastic catheter of routine, and when reaching the same mechanical performance requirement, the conduit wall thickness can reduce half, and the transportation performance of conduit, handling and security performance improve greatly.
2) composite conduit of the present invention is compared with the braiding conduit of being strengthened by mesh grid, and the conduit fracture resistance improves greatly, thereby the transportation performance of composite conduit and handling are improved, and operating difficulty reduces, and success rate of operation is improved.
3) composite conduit of the present invention is compared with the spring guide of being strengthened by spring net, and conduit stretch-proof performance improves greatly, thereby the safety of composite conduit is improved, and success rate of operation is improved.
4) compared with braiding conduit and spring guide, it is less that composite conduit far-end external diameter can be done, and is more suitable for blood vessel and gets involved, and under the similarity condition, composite conduit can be pushed to more far-reaching, less blood vessel, and success rate of operation is improved.
Description of drawings
Fig. 1 is the axial cutaway view of composite conduit of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing this utility model is further described.Following examples only are used for the technical solution of the utility model more clearly is described, and can not limit protection domain of the present utility model with this.
Composite conduit of the present utility model comprises the plastic catheter 1 of circular tube shaped and is positioned at mesh grid 2 and the spring net 3 of the circular tube shaped that the plastic catheter inner sleeve stacks, as shown in Figure 1.In order to reduce the frictional force of composite conduit inwall, preferably adhere to the ultra-thin polyfluortetraethylene pipe of one deck (PTFE) or high density ethylene pipe (HDPE) (not shown) at the composite conduit innermost layer in addition.Spring net 3 is mainly used to improve the composite conduit fracture resistance, and mesh grid 2 is mainly used to improve the axial stretch-proof performance of composite conduit, and composite conduit can handlingly be improved a lot, and composite conduit can arrive darker farther little blood vessel, operating difficulty reduces, and success rate of operation increases substantially.This composite conduit both can be used as curable product, also can be used as the normal domestic product.
Mesh grid 2 can be identical with plastic catheter length with spring net 3 in the composite conduit, also can be shorter than plastic catheter length.Mesh grid 2 and spring net 3 length are identical or different.Better scheme is the total length that spring net 3 runs through plastic catheter, and its Main Function is the radially mechanical performance that improves the composite conduit far-end.And mesh grid 2 stops in plastic catheter 1 far-end somewhere, makes the length that is shorter in length than spring net of far-end mesh grid, and its Main Function is to improve the mechanical performance of composite conduit except far-end, such as the propelling movement performance of composite conduit.Because the composite conduit distal portions only has spring net to strengthen, this section wall thickness can be slightly less than other parts of composite conduit.The composite conduit design that the far-end external diameter is more tiny is more suitable for blood vessel and gets involved, because distal vessels is always tiny than near-end blood vessel.
In the composite conduit, mesh grid 2 is enclosed within spring net 3 outsides or spring net 3 is enclosed within mesh grid 2 outsides.At least each one of sheathed mesh grid and spring net also can be that wherein mesh grid or spring net is sheathed a plurality of, and the multiple structure that forms like this is more conducive to reduce the wall thickness of conduit, the raising combination property.
In the composite conduit length range, (Pick Per Inch, PPI) is identical or variable for the mesh grid count, and the count of spring net (adjacent two spacing) is identical or variable.
The silk material that mesh grid in the composite conduit and spring net are used can be the circle silk, also can be flat filament.The diameter of circle silk, the thickness of flat filament, width are between 5 microns and 5000 microns.
Plastic bushing material in the composite conduit is one or more following materials.Applicable plastic material is including, but not limited to material beneath among the present invention:
1) nylon;
2) block polyetheramides elastomer product (Polyether Block Amide, Pebax);
3) polyurethane (Polyurethane);
4) silicone rubber.
Mesh grid in the composite conduit, spring net are manufactured by following one or more materials and are formed.Comprise but be not only following material:
1) tweezer titanium alloy (memorial alloy);
2) cochrome;
3) rustless steel;
4) pure platinum and alloy thereof;
5) true yellow gold and alloy thereof;
6) pure tungsten and alloy thereof;
7) pure tantalum and alloy thereof.
The above only is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from this utility model know-why; can also make some improvement and distortion, these improvement and distortion also should be considered as protection domain of the present utility model.
Claims (10)
1. a composite conduit is characterized in that, comprises
The plastic catheter of circular tube shaped,
Be positioned at mesh grid and the spring net of the circular tube shaped that the plastic catheter inner sleeve stacks.
2. composite conduit according to claim 1 is characterized in that, described mesh grid, spring net form by metal wire knitted.
3. composite conduit according to claim 1 is characterized in that, the length of described mesh grid, spring net is identical with described plastic catheter or be shorter than plastic catheter.
4. composite conduit according to claim 1 is characterized in that, described spring net runs through the total length of described plastic catheter, in a plastic catheter end wherein, the length that is shorter in length than spring net of described mesh grid.
5. composite conduit according to claim 1 is characterized in that, in the composite conduit, and each one of sheathed at least described mesh grid and spring net, or mesh grid wherein or spring net are sheathed a plurality of.
6. composite conduit according to claim 1 is characterized in that, described mesh grid or spring net be shorter in length than described plastic catheter and described plastic catheter far-end clear, colorless;
Described plastic catheter far-end has a soft section than near-end softness, and described mesh grid or spring net extend in the soft section of far-end 1 to 2 centimetre.
7. composite conduit according to claim 2 is characterized in that, described silk material wiry is circle silk or flat filament.
8. composite conduit according to claim 7 is characterized in that, the diameter of described circle silk, the thickness of flat filament, width are between 5 microns and 1000 microns.
9. composite conduit according to claim 1 is characterized in that, the material of described plastic catheter is nylon, block polyetheramides elastomer, polyurethane or silicone rubber.
10. composite conduit according to claim 2, it is characterized in that, the tinsel material of described mesh grid, spring net is tweezer titanium alloy, cochrome or rustless steel, or is pure platinum, true yellow gold, pure tungsten or pure tantalum, or is pure platinum alloy, true yellow billon, pure tungsten alloy or pure tantalum alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220322491 CN202724419U (en) | 2012-07-05 | 2012-07-05 | Composite conduit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220322491 CN202724419U (en) | 2012-07-05 | 2012-07-05 | Composite conduit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202724419U true CN202724419U (en) | 2013-02-13 |
Family
ID=47650175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220322491 Expired - Fee Related CN202724419U (en) | 2012-07-05 | 2012-07-05 | Composite conduit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202724419U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104238006A (en) * | 2013-06-18 | 2014-12-24 | 吕路可 | Light pipe body |
| CN108042897A (en) * | 2017-12-28 | 2018-05-18 | 南京普微森医疗科技有限公司 | A kind of composite construction conduit |
| CN108514677A (en) * | 2018-04-28 | 2018-09-11 | 业聚医疗器械(深圳)有限公司 | A kind of microtubular |
| CN111467650A (en) * | 2020-05-27 | 2020-07-31 | 深圳北芯生命科技有限公司 | Micro-catheter |
-
2012
- 2012-07-05 CN CN 201220322491 patent/CN202724419U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104238006A (en) * | 2013-06-18 | 2014-12-24 | 吕路可 | Light pipe body |
| CN108042897A (en) * | 2017-12-28 | 2018-05-18 | 南京普微森医疗科技有限公司 | A kind of composite construction conduit |
| CN108514677A (en) * | 2018-04-28 | 2018-09-11 | 业聚医疗器械(深圳)有限公司 | A kind of microtubular |
| CN111467650A (en) * | 2020-05-27 | 2020-07-31 | 深圳北芯生命科技有限公司 | Micro-catheter |
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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: 20130213 Termination date: 20150705 |
|
| EXPY | Termination of patent right or utility model |