CN201806799U - Trigeminal vessel - Google Patents
Trigeminal vessel Download PDFInfo
- Publication number
- CN201806799U CN201806799U CN2010205722641U CN201020572264U CN201806799U CN 201806799 U CN201806799 U CN 201806799U CN 2010205722641 U CN2010205722641 U CN 2010205722641U CN 201020572264 U CN201020572264 U CN 201020572264U CN 201806799 U CN201806799 U CN 201806799U
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- China
- Prior art keywords
- blood vessel
- trident
- trigeminal
- vessel
- straight tube
- 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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- Prostheses (AREA)
Abstract
The utility model relates to a trigeminal vessel. The trigeminal vessel comprises a forked expanded polytetrafluoroethylene tubular structure and a fluorinated ethylene propylene reinforced film wrapped outside the tubular structure. The tubular structure comprises a straight tube, two branch tubes and transition parts connecting the straight tube and the two branch tubes, and the transition parts are provided with medical adhesive coatings. The trigeminal vessel can be permanently planted into the human body, pregelatinization is not required during operation, and blood leakage can be avoided. The trigeminal vessel is only needed to be trimmed according to the specific conditions of patients, operation time is largely reduced, and patient pain is reduced. The trigeminal vessel has excellent bio-compatibility, and is suitable for being used as the substitute of trigeminal vessels, particularly the substitute of abdominal aorta.
Description
Technical field
This utility model relates to a kind of medical prosthesis, belongs to medical instruments field; Particularly, relate to a kind of ventral aorta substitute, promptly a kind of trident blood vessel.
Background technology
Ventral aorta is the arteries of human body maximum, directly continues in aorta, thoracic aorta from left ventricle, and is descending along left of spine, mainly is responsible for the blood supply of abdominal viscera and stomach wall.
(abdominal aortic aneurysm is a kind of artery distensibility disease AAA) to abdominal aortic aneurysm, is that aneurysm is modal a kind of.The danger of its maximum is aneurysm rupture; In a single day aneurysm breaks, and mortality rate is up to more than 50%; Aneurysm rupture takes place suddenly in more patients under the situation of no any symptom, the disruptive mortality of this class tumor body can reach more than 90%.Therefore, medical circle also is called people's intravital " time bomb " to abdominal aortic aneurysm.
The main cause of ventral aorta neoplasia is an arteriosclerosis, and this is modal.After the arteries generation is atherosis, the local tube wall of tremulous pulse is thickened, cause the nutrition supply obstacle of blood vessel, this moment, the degeneration variation can take place in endarterium thereupon, thereby formed abdominal aortic aneurysm.Certainly, also there is the part patient to be because wound, infection or congenital causing.
At present, treat this sick method and mainly contain following two kinds: 1. 2. abdominal aortic aneurysm excision of interventional therapy, prosthetic vessel replacement.For first method, be less invasive techniques, wound is little, and the patient suffering is few.But can not fundamentally eliminate the disruptive danger of tumor body, continue tube wall is formed pressure because blood can see through support.Along with the progress of medical skill, abdominal aortic aneurysm excision, artificial vascular graft have become one of main means of treatment abdominal aortic aneurysm.
This operation is implemented on the large artery trunks of pathological changes, and anaesthetic treatment is difficult, upsets bigger to people's cardiovascular.The abdominal aortic aneurysm operating difficulty is big, the change of illness state complexity.And abdominal aortic aneurysm is a kind of Senile disease, and these patients are most and have hypertension, coronary heart disease, diabetes etc., and the danger of operation is greatly improved.And in blood vessel grafting, traditional blood vessel often needs pre-coagulating to handle, and just relates to fixed attention in advance and draws blood in patient's body, and blood vessel is soaked, and operating time is long, has increased patient's misery greatly.
Therefore, seek a kind of good biocompatibility that has, not needing the pre-ventral aorta succedaneum that coagulates processing is numerous doctors and patient's demand.
The utility model content
The purpose of this utility model provides a kind of trident blood vessel succedaneum with good biocompatibility, and this implants product implant into body forever, does not need pre-coagulating to handle in the operation, only needs to prune according to patient's concrete condition in operation.Significantly reduce operating time, reduced patient's misery.
In order to achieve the above object, this utility model provides a kind of trident blood vessel, this trident blood vessel is the expanded polytetrafluoroethyltube tube shape structure with bifurcated, it comprises straight tube, two Y-branches and connect the transition portion of straight tube and Y-branch, this transition portion is provided with the adhesive of medical coating, further avoids the issuable blood of connecting portion to leak.
Above-mentioned trident blood vessel, wherein, described trident blood vessel also comprises the perfluoroethylene-propylene strengthening membrane that coating is arranged on described tubular structure outside.
Above-mentioned trident blood vessel, wherein, the internal diameter of this straight tube is slightly larger than the internal diameter sum of two Y-branches.
Above-mentioned trident blood vessel, wherein, described two Y-branch internal diameter sizes are identical.
Above-mentioned trident blood vessel, wherein, described transition portion is to connect straight tube and two Y-branches formation by the expanded PTFE suturing with thread management.
Above-mentioned trident blood vessel wherein, coats on the described bifurcated vessels and is provided with the perfluoroethylene-propylene strengthening membrane.
It is raw material that the bifurcated artificial blood vessel that this utility model provides adopts politef, make it expanded by stretching, form " knot and fiber " structure, micropore can be grown into by the induced tissue cell, help the formation of new intima, and microcellular structure is enough little, blood can't permeate, avoid blood to leak phenomenon, and before implantation, do not needed to coagulate in advance processing procedure.Described expanded PTFE is a soft type, and is enough soft and have toughness, in use can resist the pulling force of suture, formation that can pre-preventing thrombosis.The transition portion that connects straight tube and two arms is provided with the adhesive of medical coating, can prevent that pin hole and joint portion from blood occurring and leaking.And expanded PTFE itself has excellent biological compatibility, rejection phenomenon can not occur after the implantation.
Description of drawings
The structural representation of a kind of trident blood vessel that Fig. 1 provides for this utility model.
The specific embodiment
Below in conjunction with drawings and Examples the technical solution of the utility model is described further.
As shown in Figure 1, this utility model provides a kind of trident blood vessel, and this trident blood vessel is the expanded polytetrafluoroethyltube tube shape structure with bifurcated, the transition portion 30 that it comprises 10, two Y-branches 20 of straight tube and connects straight tube 10 and two Y-branches 20.Described straight tube 10 is connected by the expanded PTFE suturing with thread management with two Y-branches 20, forms transition portion 30.The transition portion 30 of described trident blood vessel is provided with the adhesive of medical coating, leaks because of the issuable blood of pin hole to avoid the suture site.This adhesive of medical coating can be a medical silica-gel.Coat on the described trident blood vessel and be provided with the perfluoroethylene-propylene strengthening membrane.Above-mentioned expanded PTFE is a soft type.The internal diameter of described straight tube 10 is the internal diameter sum of two Y-branches 20.Preferably, described two Y-branches, 20 internal diameter sizes are identical.
This utility model also provides a kind of preparation method of artificial trident blood vessel, and this method comprises following concrete steps:
Step 1, preforming: under the room temperature, with decentralized polyflon and the extrusion aid mixed by weight 20:1-30:1, form the paste shape, the preforming bar uses tubular die, and pushing forms tubing.By regulating the size of mould, obtain the tubing of different inner diameters.Extrusion aid not only plays lubrication, so that after shearing force, the spherical resin granule is stretched becomes the uniform fibers structure.So extrusion aid requires to have good lubricity, chemically reactive not in forming process is easy to after the molding.The material that can make extrusion aid according to above-mentioned requirements mainly is an organic solvent, as toluene, petroleum ether, solvent naphtha, paraffin wet goods, the auxiliary agent that this utility model adopts is the isoparaffin solvent oil (Isopar M) that Ai Kesen chemistry (Exxon Chemical) company provides; Polyflon is provided by Asahi Glass chemical industry trade Co., Ltd (AGC company).
Step 2 removes extrusion aid: extrusion aid generally is difficult to high temperature resistant, otherwise when sintering carbonization can take place, and product is showed signs of anger, and influences properties of product.So before sintering, need remove extrusion aid.Removing of extrusion aid can be taked dual mode: extraction and heating allow its volatilization.Extraction utilizes the similar compatibility principle, and is easy to operate, but extraction is difficult to extrusion aid is removed, and may introduce new impurity simultaneously.This utility model has been taked the heating oil removal process, adopts the method for heating, allows solvent naphtha volatilize, and this method is not introduced new impurity, and oil removing is thorough, and heating-up temperature is 80-220 ℃.
Step 3 stretches: dried polyfluortetraethylene pipe is heated to 280-327 ℃ stretches, (adopting tensilometer is the biaxial stretching machine, and draw ratio is 3-6 times) makes it expanded, produces a large amount of knots and the structure of fiber; Regulate fibre length by controlling tensile speed and multiple, fibre length is the 20-50 micron.Maintain under this temperature typing 5min ~ 30min.
Step 4, sew up: three tubing that obtain by said method (make straight tube for 1,2 Y-branches with less internal diameter, wherein, the straight tube internal diameter is slightly larger than 2 times of Y-branch internal diameter).With an end of two Y-branches, adopt the expanded PTFE suture to sew up earlier, stitch length is 2-5cm; To sew up an end again and insert straight tube inside, and make each Y-branch carry out part with straight tube respectively and sew up (stitch length is 2-5cm), form the transition portion of trident blood vessel.
Step 5, coating and overlay film: the transition portion of the trident blood vessel after step 4 sewed up carries out coating, mainly is to prevent that pin hole and joint portion from blood occurring and leaking; Coating mainly adopts adhesive of medical, require to have safety, reliable, avirulence and have excellent biological compatibility, and bonding strength and persistency is enough good, and stick portion has must elasticity and toughness.This utility model adopts medical silica-gel to carry out coating.At last in order to strengthen the anti-suture pulling force of the trident blood vessel that this utility model relates to, at trident blood vessel outer wrapping one deck strengthening membrane perfluoroethylene-propylene (FEP).
The artificial trident blood vessel that this utility model provides, do not need pre-coagulating to handle, only promptly implantable to its cutting according to patient's concrete condition, significantly reduced in the blood vessel use of other type, the time of need to draw blood, blood coagulation being handled, it is also few relatively that blood vessel is exposed to the airborne time, reduced the probability that infects.Expanded PTFE bifurcated vessels of the present utility model has microcellular structure, can allow histiocyte grow into, and helps the formation of new intima.
Although content of the present utility model has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to restriction of the present utility model.After those skilled in the art have read foregoing, for multiple modification of the present utility model with to substitute all will be conspicuous.Therefore, protection domain of the present utility model should be limited to the appended claims.
Claims (5)
1. trident blood vessel, it is characterized in that, this trident blood vessel is the expanded polytetrafluoroethyltube tube shape structure with bifurcated, it comprises straight tube (10), the transition portion (30) of two Y-branches (20) and connection straight tube (10) and two Y-branches (20), this transition portion (30) is provided with the adhesive of medical coating.
2. trident blood vessel as claimed in claim 1 is characterized in that, described trident blood vessel also comprises the perfluoroethylene-propylene strengthening membrane that coating is arranged on described tubular structure outside.
3. trident blood vessel as claimed in claim 1 is characterized in that, the internal diameter of this straight tube (10) is greater than the internal diameter sum of two Y-branches (20).
4. trident blood vessel as claimed in claim 3 is characterized in that, described two Y-branches (20) internal diameter size is identical.
5. trident blood vessel as claimed in claim 1 is characterized in that, the described part (30) of crossing is to connect straight tube (10) by the expanded PTFE suturing with thread management to form with two Y-branches (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205722641U CN201806799U (en) | 2010-10-22 | 2010-10-22 | Trigeminal vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205722641U CN201806799U (en) | 2010-10-22 | 2010-10-22 | Trigeminal vessel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201806799U true CN201806799U (en) | 2011-04-27 |
Family
ID=43889757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205722641U Expired - Fee Related CN201806799U (en) | 2010-10-22 | 2010-10-22 | Trigeminal vessel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201806799U (en) |
-
2010
- 2010-10-22 CN CN2010205722641U patent/CN201806799U/en not_active Expired - Fee Related
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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: 20110427 Termination date: 20131022 |