CN103989538A - Tubular fiber assembly strengthened pipeline apparatus cast molding device and using method thereof - Google Patents
Tubular fiber assembly strengthened pipeline apparatus cast molding device and using method thereof Download PDFInfo
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- CN103989538A CN103989538A CN201410219839.4A CN201410219839A CN103989538A CN 103989538 A CN103989538 A CN 103989538A CN 201410219839 A CN201410219839 A CN 201410219839A CN 103989538 A CN103989538 A CN 103989538A
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- locking cap
- stem
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- interior
- lower locking
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Abstract
The invention provides a tubular fiber assembly strengthened pipeline apparatus cast molding device and a using method thereof. The tubular fiber assembly strengthened pipeline apparatus cast molding device is characterized by comprising a base, an outer lower fixing cap, an inner lower fixing cap, a core column, an inner upper fixing cap, an outer upper fixing cap and a tubular casing, wherein the outer lower fixing cap is in threaded connection with the base, the inner upper fixing cap is in threaded connection with the outer lower fixing cap, one end of the core column is in threaded connection with the inner lower fixing cap, the inner upper fixing cap is in threaded connection with the other end of the core column, the outer side of the core column is sleeved by a tubular fiber assembly, two ends of the tubular fiber assembly are respectively fixed on the inner upper fixing cap and the inner lower fixing cap, the outer upper fixing cap is fixedly connected with the inner upper fixing cap, the outer lower fixing cap and the outer upper fixing cap are wrapped by the tubular casing, a tubular cavity is formed between the core column and the tubular casing, and the tubular casing is formed by detachably connecting at least two portions. The tubular fiber assembly strengthened pipeline apparatus cast molding device is suitable for cast molding of a tubular fiber assembly strengthened pipeline apparatus through a macromolecular solution.
Description
Technical field
The present invention relates to tubular fiber aggregation reinforced pipe road organ cast-molding device and using method thereof, belong to bio-medical technical field.
Background technology
Pipeline configuration has a wide range of applications in biomedical materials field, as artificial blood vessel, artificial esophagus, ureter rack tube etc.At present, bio-medical pipeline material mainly comprises polyester filament, fibroin fiber, ePTFE and other natural or synthetic degradable or non-degradable high polymer material.That forming method comprises is woven, braiding, knitting, injection moulding and Static Spinning etc.Adopt different materials and forming method combination can obtain the pipeline of different shape, structure and performance.
Through investigation, the existing patent about medical pipeline organ cast-molding device is less both at home and abroad at present.Patent " a kind of artificial blood vessel preparation facilities " (publication number: CN103156707A) of the people such as the patent close with the present invention has 1, Yang Hongjun application.Described in this patent, device installs with described in this patent and using method has obviously differently, and device dismounting of the present invention is simple and the demoulding is easy.
Summary of the invention
The problem to be solved in the present invention is to provide tubular fiber aggregation reinforced pipe road organ cast-molding device and using method thereof.The present invention can one-shot forming interior diameter and the overall diameter seamless pipeline that accurately controlled tubular fiber aggregation strengthens, and the dismounting of this device is simple and the demoulding is easy.This device is applicable to tubular fiber aggregation as strengthening base, utilizes macromolecular solution moulding by casting pipeline organ.
In order to address the above problem, the invention provides tubular fiber aggregation reinforced pipe road organ cast-molding device, it is characterized in that, comprise base, outside lower locking cap, interior lower locking cap, stem stem, interior upper locking cap, outside upper locking cap and tube-like envelope, the described outside lower locking cap base that is threaded, in the lower locking cap outside lower locking cap that is threaded, lower locking cap in stem stem threaded one end connects, in the be threaded other end of stem stem of upper locking cap, stem stem outside cover has tubular fiber aggregation, tubular fiber aggregation two ends are separately fixed on interior upper locking cap and interior lower locking cap, outside upper locking cap is fixedly connected with interior upper locking cap, the outside of outside lower locking cap and outside upper locking cap is surrounded by tube-like envelope, between stem stem and tube-like envelope, form tubular cavity, described tube-like envelope adopts removably to be formed by connecting by two parts at least.
Preferably, described tube-like envelope is comprised of shell one and shell two, and the side of shell one and shell two adopts removably to be connected, and described removably is concavo-convex coincideing.
Preferably, the overall diameter of described outside lower locking cap and outside upper locking cap is between 3mm to 60mm.
Preferably, the interior diameter of described tube-like envelope is between 3mm to 60mm.
Preferably, the diameter of described stem stem is between 1mm to 50mm.
Preferably, the material of described base, outside lower locking cap, interior lower locking cap, stem stem, interior upper locking cap, outside upper locking cap, shell one and shell two is selected rustless steel or glass or politef independently.
The present invention also provides the using method of above-mentioned tubular fiber aggregation reinforced pipe road organ cast-molding device, it is characterized in that, concrete steps comprise:
Step 1: outside lower locking cap is connected with whorl of base, interior lower locking cap is threaded with outside lower locking cap, stem stem one end is threaded with interior lower locking cap, tubular fiber aggregation is enclosed within to stem stem outside, on tubular fiber aggregation one end is tied up and is fixed under interior locking cap with stitching thread, again interior upper locking cap is threaded with stem stem, the other end of tubular fiber aggregation is tied up and is fixed on interior upper locking cap with stitching thread, the lower end of shell one and shell two is enclosed within to the outside of outside lower locking cap, by shell one and the concavo-convex identical formation tube-like envelope of shell dual side-edge,
Step 2: preparation is for the macromolecular solution of gate spool road organ, is cast in the tubular cavity that shell one, shell two and stem stem form, until water full bubble removing side by side, by the be threaded other end of stem stem of outside upper locking cap;
Step 3: after casting complete, package unit is placed in steady temperature environment, allow the molding of pipeline organ, after to be formed, first remove outside upper locking cap, then remove shell one and shell two, now pipeline organ and stem stem, interior lower locking cap and interior upper locking cap are integrated, interior lower locking cap and outside lower locking cap are separated, and remove respectively fixing between tubular fiber aggregation and interior lower locking cap and interior upper locking cap, respectively interior lower locking cap and interior upper locking cap are taken off and start the demoulding from stem stem, until pipeline organ is taken off smoothly.
Compared with prior art, the invention has the beneficial effects as follows:
1) can utilize macromolecular solution cast molding pipeline organ;
2) can one-shot forming interior diameter and overall diameter accurately controlled tubular fiber aggregation strengthen seamless pipeline organ;
3) dismounting of this device is simple and the demoulding is easy;
4) device provided by the invention can be realized normalizing operation completely, overcomes the deficiency of existing pipeline forming technique aspect raw material restriction and the control of pipeline morphosis.
Accompanying drawing explanation
Fig. 1 is tubular fiber aggregation reinforced pipe road organ cast-molding device structural representation;
Fig. 2 is tubular fiber aggregation reinforced pipe road organ cast-molding device assembling schematic diagram;
Fig. 3 is base schematic diagram;
Fig. 4 is interior lower locking cap, interior upper locking cap and outside lower locking cap schematic diagram;
Fig. 5 is stem stem schematic diagram;
Fig. 6 is outside upper locking cap schematic diagram;
Fig. 7 is shell one and shell two schematic diagrams.
The specific embodiment
For the present invention is become apparent, hereby with preferred embodiment, and be described in detail below.
Embodiment mono-:
As shown in Figure 1, for tubular fiber aggregation reinforced pipe road organ cast-molding device structural representation, described tubular fiber aggregation reinforced pipe road organ cast-molding device, comprise base 1, outside lower locking cap 2, interior lower locking cap 3, stem stem 4, interior upper locking cap 5, outside upper locking cap 6 and tube-like envelope, described outside lower locking cap 2 base 1 that is threaded, in the lower locking cap 3 outside lower locking cap 2 that is threaded, lower locking cap 3 in stem stem 4 threaded one ends connect, in the be threaded other end of stem stem 4 of upper locking cap 5, as shown in Figure 2, stem stem 4 outside covers have tubular fiber aggregation 9, tubular fiber aggregation 9 two ends are separately fixed on interior upper locking cap 5 and interior lower locking cap 3, outside upper locking cap 6 is fixedly connected with interior upper locking cap 5, the outside of outside lower locking cap 2 and outside upper locking cap 6 is surrounded by tube-like envelope, between stem stem 4 and tube-like envelope, form tubular cavity, described tube-like envelope is comprised of shell 1 and shell 28, the side of shell 1 and shell 28 adopts concavo-convex methods of anastomosis to be connected.
As shown in Figure 3, base 1 material selection rustless steel, there is screw at its center, to outside lower locking cap 2 is installed.As shown in Figure 4, outside lower locking cap 2, interior lower locking cap 3, interior upper locking cap 5 material selection rustless steels, outside lower locking cap 2 overall diameters are 12mm, interior lower locking cap 3 is 11mm with the overall diameter of interior upper locking cap 5.As shown in Figure 5, stem stem 4 material selection rustless steels, all there is screw thread at its two ends, diameter 10mm.As shown in Figure 6, outside upper locking cap 6 material selection rustless steels, overall diameter is 12mm.As shown in Figure 7, shell 1 and shell 28 are two semi-circular tubes, material selection rustless steel, and side adopts concavo-convex mode to coincide, and interior diameter is 12mm.
Use above-mentioned tubular fiber aggregation reinforced pipe road organ cast-molding device to prepare interior diameter for the method that 10mm, the overall diameter tubular fiber aggregation that is 12mm strengthens polyurethane tube road organ to be:
Step 1: outside lower locking cap 2 is threaded with base 1, interior lower locking cap 3 is threaded with outside lower locking cap 2, stem stem 4 one end are threaded with interior lower locking cap 3, tubular fiber aggregation 9 is enclosed within to stem stem 4 outsides, tubular fiber aggregation 9 one end are tied up and are fixed under interior locking cap on 3 with stitching thread, again interior upper locking cap 5 is threaded with stem stem 4, the other end of tubular fiber aggregation 9 is tied up and is fixed on interior upper locking cap 5 with stitching thread, the lower end of shell 1 and shell 28 is enclosed within to the outside of outside lower locking cap 2, by shell 1 and the concavo-convex identical formation tube-like envelope of shell 28 side,
Step 2: preparation is for the polyurethane high molecule solution of gate spool road organ, is cast in the tubular cavity that shell 1, shell 28 and stem stem 4 form, until water full bubble removing side by side, by the be threaded other end of stem stem 4 of outside upper locking cap 6;
Step 3: after casting complete, package unit is placed in steady temperature environment, allow the molding of pipeline organ, after to be formed, first remove outside upper locking cap 6, then remove shell 1 and shell 28, now pipeline organ and stem stem 4, interior lower locking cap 3 and interior upper locking cap 5 are integrated, interior lower locking cap 3 and outside lower locking cap 2 are separated, and remove respectively fixing between tubular fiber aggregation 9 and interior lower locking cap 3 and interior upper locking cap 5, respectively interior lower locking cap 3 and interior upper locking cap 5 are taken off and start the demoulding from stem stem 4, until pipeline organ is taken off smoothly.Last rinser part, in order to being used next time.
Embodiment bis-:
As shown in Figure 1, for tubular fiber aggregation reinforced pipe road organ cast-molding device structural representation, described tubular fiber aggregation reinforced pipe road organ cast-molding device, comprise base 1, outside lower locking cap 2, interior lower locking cap 3, stem stem 4, interior upper locking cap 5, outside upper locking cap 6 and tube-like envelope, described outside lower locking cap 2 base 1 that is threaded, in the lower locking cap 3 outside lower locking cap 2 that is threaded, lower locking cap 3 in stem stem 4 threaded one ends connect, in the be threaded other end of stem stem 4 of upper locking cap 5, as shown in Figure 2, stem stem 4 outside covers have tubular fiber aggregation 9, tubular fiber aggregation 9 two ends are separately fixed on interior upper locking cap 5 and interior lower locking cap 3, outside upper locking cap 6 is fixedly connected with interior upper locking cap 5, the outside of outside lower locking cap 2 and outside upper locking cap 6 is surrounded by tube-like envelope, between stem stem 4 and tube-like envelope, form tubular cavity, described tube-like envelope is comprised of shell 1 and shell 28, the side of shell 1 and shell 28 adopts concavo-convex methods of anastomosis to be connected.
As shown in Figure 3, base 1 material selection glass, there is screw at its center, to outside lower locking cap 2 is installed.As shown in Figure 4, outside lower locking cap 2, interior lower locking cap 3, interior upper locking cap 5 material selection glass, outside lower locking cap 2 overall diameters are 60mm, interior lower locking cap 3 is 55mm with the overall diameter of interior upper locking cap 5.As shown in Figure 5, stem stem 4 material selection glass, all there is screw thread at its two ends, diameter 50mm.As shown in Figure 6, outside upper locking cap 6 material selection glass, overall diameter is 60mm.As shown in Figure 7, shell 1 and shell 28 are two semi-circular tubes, material selection glass, and side adopts concavo-convex mode to coincide, and interior diameter is 60mm.
Use above-mentioned tubular fiber aggregation reinforced pipe road organ cast-molding device to prepare interior diameter for the method that 50mm, the overall diameter tubular fiber aggregation that is 60mm strengthens collagen protein pipeline organ to be:
Step 1: outside lower locking cap 2 is threaded with base 1, interior lower locking cap 3 is threaded with outside lower locking cap 2, stem stem 4 one end are threaded with interior lower locking cap 3, tubular fiber aggregation 9 is enclosed within to stem stem 4 outsides, tubular fiber aggregation 9 one end are tied up and are fixed under interior locking cap on 3 with stitching thread, again interior upper locking cap 5 is threaded with stem stem 4, the other end of tubular fiber aggregation 9 is tied up and is fixed on interior upper locking cap 5 with stitching thread, the lower end of shell 1 and shell 28 is enclosed within to the outside of outside lower locking cap 2, by shell 1 and the concavo-convex identical formation tube-like envelope of shell 28 side,
Step 2: preparation is for the collagen protein macromolecular solution of gate spool road organ, is cast in the tubular cavity that shell 1, shell 28 and stem stem 4 form, until water full bubble removing side by side, by the be threaded other end of stem stem 4 of outside upper locking cap 6;
Step 3: after casting complete, package unit is placed in steady temperature environment, allow the molding of pipeline organ, after to be formed, first remove outside upper locking cap 6, then remove shell 1 and shell 28, now pipeline organ and stem stem 4, interior lower locking cap 3 and interior upper locking cap 5 are integrated, interior lower locking cap 3 and outside lower locking cap 2 are separated, and remove respectively fixing between tubular fiber aggregation 9 and interior lower locking cap 3 and interior upper locking cap 5, respectively interior lower locking cap 3 and interior upper locking cap 5 are taken off and start the demoulding from stem stem 4, until pipeline organ is taken off smoothly.Last rinser part, in order to being used next time.
Embodiment tri-:
As shown in Figure 1, for tubular fiber aggregation reinforced pipe road organ cast-molding device structural representation, described tubular fiber aggregation reinforced pipe road organ cast-molding device, comprise base 1, outside lower locking cap 2, interior lower locking cap 3, stem stem 4, interior upper locking cap 5, outside upper locking cap 6 and tube-like envelope, described outside lower locking cap 2 base 1 that is threaded, in the lower locking cap 3 outside lower locking cap 2 that is threaded, lower locking cap 3 in stem stem 4 threaded one ends connect, in the be threaded other end of stem stem 4 of upper locking cap 5, as shown in Figure 2, stem stem 4 outside covers have tubular fiber aggregation 9, tubular fiber aggregation 9 two ends are separately fixed on interior upper locking cap 5 and interior lower locking cap 3, outside upper locking cap 6 is fixedly connected with interior upper locking cap 5, the outside of outside lower locking cap 2 and outside upper locking cap 6 is surrounded by tube-like envelope, between stem stem 4 and tube-like envelope, form tubular cavity, described tube-like envelope is comprised of shell 1 and shell 28, the side of shell 1 and shell 28 adopts concavo-convex methods of anastomosis to be connected.
As shown in Figure 3, base 1 material selection politef, there is screw at its center, to outside lower locking cap 2 is installed.As shown in Figure 4, outside lower locking cap 2, interior lower locking cap 3, interior upper locking cap 5 material selection politef, outside lower locking cap 2 overall diameters are 30mm, interior lower locking cap 3 is 25mm with the overall diameter of interior upper locking cap 5.As shown in Figure 5, stem stem 4 material selection politef, all there is screw thread at its two ends, diameter 20mm.As shown in Figure 6, outside upper locking cap 6 material selection politef, overall diameter is 30mm.As shown in Figure 7, shell 1 and shell 28 are two semi-circular tubes, material selection politef, and side adopts concavo-convex mode to coincide, and interior diameter is 30mm.
Use above-mentioned tubular fiber aggregation reinforced pipe road organ cast-molding device to prepare interior diameter for the method that 20mm, the overall diameter tubular fiber aggregation that is 30mm strengthens polylactic-acid tube road organ to be:
Step 1: outside lower locking cap 2 is threaded with base 1, interior lower locking cap 3 is threaded with outside lower locking cap 2, stem stem 4 one end are threaded with interior lower locking cap 3, tubular fiber aggregation 9 is enclosed within to stem stem 4 outsides, tubular fiber aggregation 9 one end are tied up and are fixed under interior locking cap on 3 with stitching thread, again interior upper locking cap 5 is threaded with stem stem 4, the other end of tubular fiber aggregation 9 is tied up and is fixed on interior upper locking cap 5 with stitching thread, the lower end of shell 1 and shell 28 is enclosed within to the outside of outside lower locking cap 2, by shell 1 and the concavo-convex identical formation tube-like envelope of shell 28 side,
Step 2: preparation is for the polylactic acid macromolecular solution of gate spool road organ, is cast in the tubular cavity that shell 1, shell 28 and stem stem 4 form, until water full bubble removing side by side, by the be threaded other end of stem stem 4 of outside upper locking cap 6;
Step 3: after casting complete, package unit is placed in steady temperature environment, allow the molding of pipeline organ, after to be formed, first remove outside upper locking cap 6, then remove shell 1 and shell 28, now pipeline organ and stem stem 4, interior lower locking cap 3 and interior upper locking cap 5 are integrated, interior lower locking cap 3 and outside lower locking cap 2 are separated, and remove respectively fixing between tubular fiber aggregation 9 and interior lower locking cap 3 and interior upper locking cap 5, respectively interior lower locking cap 3 and interior upper locking cap 5 are taken off and start the demoulding from stem stem 4, until pipeline organ is taken off smoothly.Last rinser part, in order to being used next time.
Claims (7)
1. a tubular fiber aggregation reinforced pipe road organ cast-molding device, it is characterized in that, comprise base (1), outside lower locking cap (2), interior lower locking cap (3), stem stem (4), interior upper locking cap (5), outside upper locking cap (6) and tube-like envelope, described outside lower locking cap (2) base (1) that is threaded, in lower locking cap (3) the outside lower locking cap (2) that is threaded, lower locking cap (3) in stem stem (4) threaded one end connects, in the be threaded other end of stem stem (4) of upper locking cap (5), stem stem (4) outside cover has tubular fiber aggregation (9), tubular fiber aggregation (9) two ends are separately fixed on interior upper locking cap (5) and interior lower locking cap (3), outside upper locking cap (6) is fixedly connected with interior upper locking cap (5), the outside of outside lower locking cap (2) and outside upper locking cap (6) is surrounded by tube-like envelope, between stem stem (4) and tube-like envelope, form tubular cavity, described tube-like envelope adopts removably to be formed by connecting by two parts at least.
2. tubular fiber aggregation reinforced pipe as claimed in claim 1 road organ cast-molding device, it is characterized in that, described tube-like envelope is comprised of shell one (7) and shell two (8), the side of shell one (7) and shell two (8) adopts removably to be connected, and described removably is concavo-convex coincideing.
3. tubular fiber aggregation reinforced pipe as claimed in claim 1 road organ cast-molding device, is characterized in that, described outside lower locking cap (2) and the overall diameter of outside upper locking cap (6) are between 3mm to 60mm.
4. tubular fiber aggregation reinforced pipe as claimed in claim 1 road organ cast-molding device, is characterized in that, the interior diameter of described tube-like envelope is between 3mm to 60mm.
5. tubular fiber aggregation reinforced pipe as claimed in claim 1 road organ cast-molding device, is characterized in that, the diameter of described stem stem (4) is between 1mm to 50mm.
6. tubular fiber aggregation reinforced pipe as claimed in claim 1 road organ cast-molding device, it is characterized in that, the material of described base (1), outside lower locking cap (2), interior lower locking cap (3), stem stem (4), interior upper locking cap (5), outside upper locking cap (6), shell one (7) and shell two (8) is selected rustless steel or glass or politef independently.
7. the using method of the tubular fiber aggregation reinforced pipe road organ cast-molding device described in any one in claim 2, is characterized in that, concrete steps comprise:
Step 1: outside lower locking cap (2) is threaded with base (1), interior lower locking cap (3) is threaded with outside lower locking cap (2), stem stem (4) one end is threaded with interior lower locking cap (3), tubular fiber aggregation (9) is enclosed within to stem stem (4) outside, tubular fiber aggregation (9) one end is tied up and is fixed under interior locking cap on (3) with stitching thread, again interior upper locking cap (5) is threaded with stem stem (4), the other end of tubular fiber aggregation (9) is tied up and is fixed on interior upper locking cap (5) with stitching thread, the lower end of shell one (7) and shell two (8) is enclosed within to the outside of outside lower locking cap (2), by shell one (7) and the concavo-convex identical formation tube-like envelope of shell two (8) side,
Step 2: preparation is for the macromolecular solution of gate spool road organ, be cast in the tubular cavity of shell one (7), shell two (8) and stem stem (4) formation, until water full bubble removing side by side, by the be threaded other end of stem stem (4) of outside upper locking cap (6);
Step 3: after casting complete, package unit is placed in steady temperature environment, allow the molding of pipeline organ, after to be formed, first remove outside upper locking cap (6), then remove shell one (7) and shell two (8), now pipeline organ and stem stem (4), interior lower locking cap (3) and interior upper locking cap (5) are integrated, interior lower locking cap (3) and outside lower locking cap (2) are separated, and remove respectively fixing between tubular fiber aggregation (9) and interior lower locking cap (3) and interior upper locking cap (5), respectively interior lower locking cap (3) and interior upper locking cap (5) are taken off and start the demoulding from stem stem (4), until pipeline organ is taken off smoothly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410219839.4A CN103989538B (en) | 2014-05-22 | 2014-05-22 | Tubular fiber aggregation reinforced pipe road organ cast-molding device and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410219839.4A CN103989538B (en) | 2014-05-22 | 2014-05-22 | Tubular fiber aggregation reinforced pipe road organ cast-molding device and using method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN103989538A true CN103989538A (en) | 2014-08-20 |
| CN103989538B CN103989538B (en) | 2016-04-06 |
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| CN201410219839.4A Expired - Fee Related CN103989538B (en) | 2014-05-22 | 2014-05-22 | Tubular fiber aggregation reinforced pipe road organ cast-molding device and using method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5759474A (en) * | 1996-04-25 | 1998-06-02 | Medtronic, Inc. | Method of making thickened inner lumen for uniform stent expansion |
| CN1568904A (en) * | 2004-05-14 | 2005-01-26 | 清华大学 | Preparation method of chitosan tubular bracket |
| US20050187615A1 (en) * | 2004-02-23 | 2005-08-25 | Williams Michael S. | Polymeric endoprostheses with enhanced strength and flexibility and methods of manufacture |
| CN101618233A (en) * | 2009-08-14 | 2010-01-06 | 东华大学 | Polytetrafluorethylene/fluoroelastomer composite artificial bile duct and preparation thereof |
| CN103156707A (en) * | 2013-03-07 | 2013-06-19 | 武汉纺织大学 | Artificial blood vessel preparing device |
-
2014
- 2014-05-22 CN CN201410219839.4A patent/CN103989538B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5759474A (en) * | 1996-04-25 | 1998-06-02 | Medtronic, Inc. | Method of making thickened inner lumen for uniform stent expansion |
| US20050187615A1 (en) * | 2004-02-23 | 2005-08-25 | Williams Michael S. | Polymeric endoprostheses with enhanced strength and flexibility and methods of manufacture |
| CN1568904A (en) * | 2004-05-14 | 2005-01-26 | 清华大学 | Preparation method of chitosan tubular bracket |
| CN101618233A (en) * | 2009-08-14 | 2010-01-06 | 东华大学 | Polytetrafluorethylene/fluoroelastomer composite artificial bile duct and preparation thereof |
| CN103156707A (en) * | 2013-03-07 | 2013-06-19 | 武汉纺织大学 | Artificial blood vessel preparing device |
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| CN103989538B (en) | 2016-04-06 |
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Granted publication date: 20160406 Termination date: 20200522 |