CN201283016Y - Artificial blood vessel - Google Patents
Artificial blood vessel Download PDFInfo
- Publication number
- CN201283016Y CN201283016Y CN 200820122661 CN200820122661U CN201283016Y CN 201283016 Y CN201283016 Y CN 201283016Y CN 200820122661 CN200820122661 CN 200820122661 CN 200820122661 U CN200820122661 U CN 200820122661U CN 201283016 Y CN201283016 Y CN 201283016Y
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- CN
- China
- Prior art keywords
- artificial blood
- blood vessel
- spiral
- inside wall
- shearing force
- 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 spiral artificial blood vessel, which aims at increasing the shearing force to the inside wall of spiral artificial blood vessels. One spiral artificial blood vessel section perpendicular to an axis is an oval section with the internal curvature smaller than the external curvature. The spiral artificial blood vessel can help to increase shearing force to the inside wall of spiral artificial blood vessels, realizes smooth washout of blood flow to artificial blood vessel wall faces, is suitable for preventing thrombosis on the inside wall of artificial blood vessels, and prevents acute thrombo-embolism.
Description
One, affiliated technical field
This utility model relates to a kind of artificial blood vessel, particularly a kind of spiral type artificial blood vessel.
Two, technical background
Discover that the human aortic bow is the space three-dimensional helical form.This special space three-dimensional helical structure makes the blood flow at ascending aorta place be the turn fluidised form just.The turn of aortic arch place blood flow is that the ascending aorta vascular wall is able to smooth washing away in case the assurance that the stop pulse atherosclerosis forms.The turn phenomenon of blood flow also exists at the large artery trunks and the coronary artery place of shank.The benefit of this fluidised form is: on the one hand, it can make blood flow stable, reduces turbulent flow; On the other hand, it can make blood vessel wall obtain smooth washing away, and reduces the deposition of harmful substance in the blood (as lipid etc.) in blood vessel wall.This turn stream principle can be used for vascular surgery and intervention apparatus design, the restenosis problem after the acute thrombus obstruction of the vascular restenosis problem that causes, small-bore artificial blood vessel and endovascular stent are implanted with downstream part vascellum endometrial hyperplasia behind the solution bypass surgery.
Small-bore (＜5-6mm bore) artificial blood vessel has been widely used in vascular bypass and the replacement operation.But, cause to lose efficacy very soon behind the small-bore artificial blood vessel implant into body because of acute thrombus stops up because small-bore artificial blood vessel blood flow is low and internal diameter is little.For addressing this problem, United States Patent (USP) notification number US2007/0021707A1, the day for announcing is on January 25th, 2007, name is called and discloses a kind of spiral type artificial blood vessel in " spiral type artificial blood vessel (helical graft) " and can produce turn stream, stops up thereby suppress acute thrombus to a certain extent.But also there is a very important problem in this artificial blood vessel: the low-shearing force zone that a zonal distribution is arranged along the medial wall of artificial blood vessel.On this belt-like zone, be easy to form thrombosis, finally cause artificial blood vessel to stop up and lost efficacy.
Three, summary of the invention
The purpose of this utility model is the deficiency that exists at existing spiral type artificial blood vessel, a kind of planform of novel spiral type artificial blood vessel is proposed, thereby improve spiral type artificial blood vessel interior sidewall surface shearing force, in the deposition of interior sidewall surface, suppress thrombosis to reduce harmful substance in the blood (as lipid etc.).
In order to solve the problems of the technologies described above, this utility model is achieved through the following technical solutions:
A kind of spiral type artificial blood vessel, the spiral type artificial blood vessel is the noncircular cross section that inboard curvature is lower than lateral curvature perpendicular to the cross section of axis.
Keeping reducing the curvature of vascular cross-section inner arc under the long-pending constant prerequisite of vessel cross-sections, make the cross section become flat.
Material of the present utility model adopts politef.
Compared with prior art, the beneficial effects of the utility model are:
Under the constant situation of physiology blood flow, not only can make and form turn stream in the artificial blood vessel, but also can improve the shearing force of spiral type blood vessel interior sidewall surface, and make interior sidewall surface obtain smooth washing away, suppress the formation of thrombosis in spiral type artificial blood vessel interior sidewall surface.
Four, description of drawings
Fig. 1 is a structural representation of the present utility model
Fig. 2 is the sectional view with this utility model axis normal
Five, the specific embodiment
As shown in Figure 1: this utility model is that the single artificial blood vessel body with spatially spiral shape constitutes, and it is characterized in that: the cross section perpendicular to vessels axis is the noncircular cross section of inboard curvature less than lateral curvature.Helicoidal structure makes the blood flow generation turn of this artificial blood pipe of flowing through, and forms well washing away blood vessel wall; The novel noncircular cross section that has of this use can improve the shearing force of spiral type artificial blood vessel interior sidewall surface, prevents the formation of tampon in interior sidewall surface, thereby prevents that acute thrombus from stopping up.
Claims (1)
1. artificial blood vessel, it is structure twist, it is characterized in that: the spiral type artificial blood vessel is the oblate cross section that inboard curvature is lower than lateral curvature perpendicular to the cross section of axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200820122661 CN201283016Y (en) | 2008-09-24 | 2008-09-24 | Artificial blood vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200820122661 CN201283016Y (en) | 2008-09-24 | 2008-09-24 | Artificial blood vessel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201283016Y true CN201283016Y (en) | 2009-08-05 |
Family
ID=40948000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200820122661 Expired - Fee Related CN201283016Y (en) | 2008-09-24 | 2008-09-24 | Artificial blood vessel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201283016Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104398316A (en) * | 2014-11-25 | 2015-03-11 | 北京航空航天大学 | Tapered spiral small-diameter artificial blood vessel capable of generating swirl flow |
| CN111374809A (en) * | 2020-03-25 | 2020-07-07 | 北京航空航天大学 | Vertebral artery stent |
-
2008
- 2008-09-24 CN CN 200820122661 patent/CN201283016Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104398316A (en) * | 2014-11-25 | 2015-03-11 | 北京航空航天大学 | Tapered spiral small-diameter artificial blood vessel capable of generating swirl flow |
| CN111374809A (en) * | 2020-03-25 | 2020-07-07 | 北京航空航天大学 | Vertebral artery stent |
| CN111374809B (en) * | 2020-03-25 | 2021-07-27 | 北京航空航天大学 | Vertebral artery stent |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090805 Termination date: 20120924 |