CN2666374Y - Medical internal stent for treating benign stricture - Google Patents
Medical internal stent for treating benign stricture Download PDFInfo
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- CN2666374Y CN2666374Y CN 200320119675 CN200320119675U CN2666374Y CN 2666374 Y CN2666374 Y CN 2666374Y CN 200320119675 CN200320119675 CN 200320119675 CN 200320119675 U CN200320119675 U CN 200320119675U CN 2666374 Y CN2666374 Y CN 2666374Y
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- benign stricture
- zhang huan
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Abstract
The utility model relates to a medical inner stent to treat the benign stenosis, as the utility model uses the structure that the end part of a membrane-covered stent is connected with a tension-relieving ring, the tension-relieving ring can effectively alleviate the stimulus of a metal wire to the cavity tube and avoid the granulation hyperplasia at the end part of the membrane-covered stent caused by the creeps of the cavity tube and the formed restenosis, therefore, the utility model is especially suitable for the expansion treatments of the benign esophageal stenosis or benign tracheal stenosis.
Description
Technical field
This utility model relates to a kind of medical stent, particularly treats the medical stent of benign stricture.
Background technology
In the prior art, when human body lumens such as treatment esophageal stricture, tracheal stenosis, biliary tract stenosis, angiostenosis are narrow, usually adopt metal rack, Ultimum Ti medical stent particularly, these medical stents have been obtained good curative effect in clinical, obtained application more and more widely over 10 years.But these bare brackets are when the treatment malignant tumor, and tumor tissues can pass metal mesh opening, forms restenosis.People such as Zhu Ming has designed a kind of Intra-cavity support for medical with film in Chinese patent ZL97200206.5 for this reason, uses attached to the high polymer elastic film on the network and prevents that pathological tissues from growing to intracavity, obtains good effect in clinical use.But when treating benign stricture, as anastomose esophagus stomach stenostomy, trachea anastomotic stricture, after part patient installs this covered stnet with this covered stnet, end at covered stnet, because the wriggling of stimulation wiry and lumen causes granulation hyperplasia, form restenosis.The medical stent of prior art still can't solve the stress concentration that the tinsel because of latticed support causes, and causes the stimulation to normal lumen wall, forms granulation hyperplasia, causes the technical barrier of restenosis.Thereby be necessary to develop a kind of stimulation that can slow down the tinsel of bracket end to lumen wall, avoid bracket end granulation hyperplasia to occur and form follow-on medical stent of restenosis.
Summary of the invention
What the medical stent of treatment benign stricture, the end that it is characterized in that covered stnet (1) had connected the flexible material manufacturing subtracts Zhang Huan (2).
---the above-mentioned Zhang Huan of subtracting (2) adopts flexible material to make tubular structure.
---the above-mentioned Zhang Huan of subtracting (2) has the geometry in particular that meets the human physiological structure, as cylindrical, toroidal, cydariform.
---the flexible material that the above-mentioned Zhang Huan of subtracting (2) adopts is flexible macromolecular material or polymeric material, as: medical silica-gel, medical polyurethane, medical ptfe.
The medical stent of the treatment benign stricture of this utility model, owing to adopted in the end of covered stnet (1) and be connected with the structure that subtracts Zhang Huan, subtract Zhang Huan (2) and avoided the stimulation of tinsel (1-1) effectively lumen, avoided causing the granulation hyperplasia of covered stnet end because of the wriggling of lumen, the restenosis that forms is particularly suitable for the dilation therapy of esophagus benign stricture or trachea benign stricture.
Description of drawings
Fig. 1 is the structural representation of Intra-cavity support for medical of the band film of prior art.
Fig. 2 is the structural representation of the medical stent that is used for the treatment of the esophagus benign stricture of this utility model.
Fig. 3 is the structural representation of the medical stent that is used for the treatment of the trachea benign stricture of this utility model.
Fig. 4 is the structural representation of medical stent of the treatment esophagus benign stricture of the anti-lobe that backflows of the band of this utility model.
Fig. 5 is that end subtracts the structural representation that Zhang Huan, lower end are the medical stent of the toroidal treatment esophagus benign stricture that subtracts the anti-lobe that backflows of an endless belt for cydariform on this utility model.
Among the above-mentioned figure: 301 is metal gauze, and 302 is the high polymer elastic film, and 1 is covered stnet, and 2 for subtracting Zhang Huan, and 3 are the anti-lobe that backflows, and 1-1 is a tinsel, and 1-2 is a flexible material film, and 2-1 is the elastic ring that subtracts on the Zhang Huan.
Specific embodiment
Covered stnet of the prior art (with reference to figure 1) has adopted the tubular structure that adheres to macromolecular material film (302) on the metal gauze (301).Overlay film partly can prevent the elongation to intracavity of tumor tissues or granulation effectively, but the tinsel of the metal grill at two ends can stimulate lumen wall such as esophageal wall or tracheal wall, causes granulation hyperplasia to form restenosis.
Embodiment 1: the medical stent that is used for the treatment of the esophagus benign stricture of this utility model
The support of this utility model in the present embodiment is the medical stent (with reference to figure 2) that is used for the treatment of the esophagus benign stricture, be connected with in the upper end of covered stnet (1) and subtract Zhang Huan (2), subtract the broadening formation tubular structure that Zhang Huan (2) has adopted flexible material to make, flexible material can be softish, suitable elastic macromolecular material or polymeric material are arranged, as manufacturings such as medical silica-gel, medical polyurethane, medical ptfe, polypropylene for medical article.The elastic ring (2-1) that has a thicker relatively flexible material to make in the top that subtracts Zhang Huan (2), elastic ring (2-1) can be fitted on the esophagus inwall subtracting Zhang Huan (2) effectively, prevents to subtract collapsing of Zhang Huan (2).When clinical use, behind the optimum narrow section of support implantation esophagus with this utility model, covered stnet (1) can effectively be expanded narrow, be in the above normal lumen of narrow section and subtract Zhang Huan (2), and be fitted on the lumen inwall, since the flexible material manufacturing subtract Zhang Huan (2) stress concentration that forms of the tinsel (1-1) of dispersion train membrane support (1) effectively, and subtracting Zhang Huan (2) can move with the wriggling of esophagus, reduced the stimulation of tinsel to esophageal mucosa membrane injury, avoided the growth of granulation, implanted in vivo 3～24 months, and after scar tissue is stable, can take out external.Usually the tinsel (1-1) of covered stnet (1) adopts medical niti-shaped memorial alloy silk, and flexible material film (1-2) adopts medical silica-gel or medical polyurethane manufacturing.It is latticed to adopt the Ultimum Ti silk to be woven on mould earlier, and the heat treatment of finalizing the design, and the net grid support that obtains exposing carries out overlay film with flexible material then in mould, obtain the support of this utility model.Usually the flexible material film of wall ratio covered stnet (1) that subtracts the flexible material on the Zhang Huan (2) is thick.The geometry that subtracts Zhang Huan (2) can be the Any shape that meets the human physiological structure, as toroidal, cylindrical, cydariform etc.
Embodiment 2: the medical stent that is used for the treatment of larynx trachea anastomotic stoma benign stricture of this utility model
In the present embodiment, the top and bottom of covered stnet (1) all are connected with and subtract Zhang Huan (2), and with reference to figure 3, the principle of its manufacturing process is identical with embodiment 1, and just the size and dimension difference meets the requirement of expanding the trachea benign stricture and gets final product.
Embodiment 3: the medical stent of the treatment esophagus benign stricture of the anti-lobe that backflows of the band of this utility model
In the present embodiment, what a broadening formation had been installed in the upper end of covered stnet (1) subtracts Zhang Huan (2), what a cylinder tube shape had been installed in the lower end of covered stnet (1) subtracts Zhang Huan (2), made the petal anti-lobe that backflows (3) simultaneously at the middle part of covered stnet (1), can prevent gastric juice effectively upwards, with reference to figure 4.
Embodiment 4:
In the present embodiment, the upper end of the covered stnet of the support of this utility model (1) subtracts Zhang Huan (2) for cydariform, the lower end is the medical stent that toroidal subtracts the treatment esophagus benign stricture of the anti-lobe that backflows of Zhang Huan (2) band, subtracting within the Zhang Huan (2) of lower end toroidal, the anti-lobe (3) that backflows has been installed at the edge of covered stnet (1) lower end, with reference to figure 5.
Should be noted that herein openly can replace with the identical structure of other effect that the embodiment that while this utility model is introduced realizes unique structure of the present utility model with the structure of explanation.Though preferential embodiment of the present utility model is introduced in this article and is illustrated; but those skilled in the art know and know that these embodiment illustrate; those skilled in the art can make countless variations, improvement and replacement; and can not break away from this utility model; therefore, should be according to the next qualification protection domain of the present utility model of the spirit and scope of this utility model appending claims.
Claims (4)
- What 1, the medical stent of treatment benign stricture, the end that it is characterized in that covered stnet (1) had connected the flexible material manufacturing subtracts Zhang Huan (2).
- 2, the medical stent of treatment benign stricture according to claim 1 is characterized in that the described Zhang Huan of subtracting (2) adopts flexible material to make tubular structure.
- 3, the medical stent of treatment benign stricture according to claim 1 is characterized in that the described Zhang Huan of subtracting (2) has the geometry in particular that meets the human physiological structure, as cylindrical, toroidal, cydariform.
- 4, the medical stent of treatment benign stricture according to claim 1 is characterized in that the flexible material that the described Zhang Huan of subtracting (2) adopts is flexible macromolecular material or polymeric material, as: medical silica-gel, medical polyurethane, medical ptfe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320119675 CN2666374Y (en) | 2003-12-25 | 2003-12-25 | Medical internal stent for treating benign stricture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320119675 CN2666374Y (en) | 2003-12-25 | 2003-12-25 | Medical internal stent for treating benign stricture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2666374Y true CN2666374Y (en) | 2004-12-29 |
Family
ID=34347733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320119675 Expired - Fee Related CN2666374Y (en) | 2003-12-25 | 2003-12-25 | Medical internal stent for treating benign stricture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2666374Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301691C (en) * | 2003-12-25 | 2007-02-28 | 傅剑华 | Medical inner rack for treating benign stricture |
-
2003
- 2003-12-25 CN CN 200320119675 patent/CN2666374Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301691C (en) * | 2003-12-25 | 2007-02-28 | 傅剑华 | Medical inner rack for treating benign stricture |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |