WO2015005105A1 - 生体管腔グラフト基材および生体管腔グラフト基材の製造方法ならびに当該生体管腔グラフト基材を用いてなる生体管腔グラフト - Google Patents
生体管腔グラフト基材および生体管腔グラフト基材の製造方法ならびに当該生体管腔グラフト基材を用いてなる生体管腔グラフト Download PDFInfo
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- WO2015005105A1 WO2015005105A1 PCT/JP2014/066588 JP2014066588W WO2015005105A1 WO 2015005105 A1 WO2015005105 A1 WO 2015005105A1 JP 2014066588 W JP2014066588 W JP 2014066588W WO 2015005105 A1 WO2015005105 A1 WO 2015005105A1
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- graft
- graft substrate
- biological lumen
- dtex
- substrate
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
- A61F2/06—Blood vessels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
- A61F2/06—Blood vessels
- A61F2/07—Stent-grafts
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/14—Macromolecular materials
- A61L27/18—Macromolecular materials obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L27/507—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials for artificial blood vessels
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/04—Macromolecular materials
- A61L31/06—Macromolecular materials obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
Definitions
- the present invention relates to a biological lumen graft base, a method for producing the biological lumen graft base, and a biological lumen graft using the biological lumen graft base.
- the stent graft is housed in a thin catheter and advanced to the site where the aneurysm is located, and the stent graft that has been housed is released and expanded from the catheter and placed in the site (affected area) where the aneurysm or dissociated.
- the incision part by the operation can be made small, the thoracotomy is not required, and the treatment method is less invasive than the artificial blood vessel replacement.
- a fiber having a shape in which the cross section of the fiber of the outermost surface layer has a side substantially parallel to the outermost surface is provided on at least one surface.
- a stent graft base fabric having a weaving density of 150 to 400 / 2.54 cm in both length and width and a thickness of 1 to 90 ⁇ m is disclosed. It is described that the stent-graft base fabric having the above configuration has thinness, high strength, low water permeability, and flexibility and can be inserted into a thinner catheter.
- Patent Document 2 discloses a graft including a graft fabric including a plurality of yarns of 5 to 50 denier. Grafts having the above configuration are described as being retractable in an intravascular delivery system having an outer diameter of about 0.06 to 0.27 inches (about 1.52 to 6.8 mm).
- JP 2011-245283 A Japanese translation of PCT publication No. 2008-505713 (corresponding to International Publication No. 2006/014592)
- the stent graft base fabric described in Patent Document 1 has a low water permeability by calendering, can produce a thin base material, and can thin the catheter to a certain extent. It is hard to say that it has been able to cope with.
- the graft described in Patent Document 2 achieves low water permeability by including a hydrophilic material.
- a hydrophilic material when a hydrophilic material is coated, there are problems that the thickness of the graft increases and the flexibility is impaired.
- the hydrophilic material since the hydrophilic material may be peeled off when housed in a thin catheter, it cannot be said that it can handle even a sufficiently thin catheter as described above.
- the present invention has been made in view of the above circumstances, and uses a biological lumen graft substrate that can be inserted into a thin catheter, a method for producing the biological lumen graft substrate, and the biological lumen graft substrate. It is an object of the present invention to provide a biological lumen graft.
- Another object of the present invention is to provide a biological lumen graft substrate having sufficient flexibility and low water permeability even in a thin film form, a method for producing the biological lumen graft substrate, and the biological lumen graft substrate. It is to provide a biological lumen graft to be used.
- Still another object of the present invention is to provide a biological lumen graft substrate excellent in at least one of thinness, high strength, low water permeability and flexibility, a method for producing the biological lumen graft substrate, and the biological lumen graft. It is providing the biological lumen graft which uses a base material.
- a base fabric obtained by pressing a woven fabric having a low single-fiber fineness woven at a low density, particularly by pressing with a calendar is a biological tube.
- the present invention has been found to be excellent in function as a cavity graft base material. Based on the above findings, the present invention has been completed.
- a living body lumen graft base material in which at least one surface of a woven fabric containing fibers having a total fineness of 1 to 80 dtex and a single yarn fineness of less than 0.1 dtex is pressed. Achieved.
- the above objects also include producing a fabric from fibers having a total fineness of 1 to 80 dtex and a single yarn fineness of less than 0.1 dtex, and calendering at least one surface of the fabric. It is also achieved by a method for manufacturing a luminal graft substrate.
- the living body lumen graft substrate and living body lumen graft of the present invention can be inserted into a thin catheter. Moreover, the living body lumen graft substrate and the living body lumen graft of the present invention have sufficient flexibility and low water permeability even in a thin film form.
- FIG. 1 is a schematic view showing a water permeability measuring device.
- 10 is a water permeability measuring device
- 11 is a sample installation part (hole); 12 is water; and 13 is a pressure gauge.
- FIG. 2 is a diagram for explaining the measurement of the adaptive sheath size.
- 2 indicates a graft
- 3 indicates a stent
- 4 indicates a thread
- 5 indicates a SUS wire
- 6 indicates a PTFE tube (sheath).
- FIG. 3 is a diagram for explaining burst intensity measurement.
- 20 is a measuring device
- 21 is a sample installation part (hole); 22 is a pusher.
- FIG. 4 is a diagram for explaining the evaluation of the sewing needle hole expansion.
- FIG. 1 is a schematic view showing a water permeability measuring device.
- 10 is a water permeability measuring device
- 11 is a sample installation part (hole)
- 12 is water
- 13 is a pressure gauge.
- FIG. 2 is
- FIG. 5 is an enlarged photograph of the surface of the base material after evaluation of the sewing needle hole expansion of the graft base material 3 of Example 3 (FIG. 5A) and the comparative graft base material 4 of Comparative Example 4 (FIG. 5B).
- FIG. 6 is a graph showing changes in burst strength with respect to the number of days of hydrolysis of graft substrates 2 and 3 of Examples 2 and 3 and comparative graft substrate 1 of Comparative Example 1 at 90 ° C.
- FIG. 5A is an enlarged photograph of the surface of the base material after evaluation of the sewing needle hole expansion of the graft base material 3 of Example 3 (FIG. 5A) and the comparative graft base material 4 of Comparative Example 4 (FIG. 5B).
- FIG. 6 is a graph showing changes in burst strength with respect to the number of days of hydrolysis of graft substrates 2 and 3 of Examples 2 and 3 and comparative graft substrate 1 of Comparative Example 1 at 90 ° C.
- FIG. 5A is
- At least one surface of a woven fabric containing fibers having a total fineness of 1 to 80 dtex and a single yarn fineness of less than 0.1 dtex is pressed by a pressing process, particularly by a calendar (in this specification, A biological luminal graft substrate (also referred to herein as “graft substrate”) is provided.
- the present invention provides a living body comprising producing a woven fabric from fibers having a total fineness of 1 to 80 dtex and a single yarn fineness of less than 0.1 dtex, and calendering at least one surface of the woven fabric.
- a method for producing a luminal graft substrate is provided.
- the biological lumen graft base material and the method for producing the biological lumen graft base material of the present invention preferably use a multifilament having a total fineness of 1 to 80 dtex, and a woven structure preferably having a single yarn fineness of less than 0.1 dtex. It is obtained by pressing a woven fabric having a cover factor of 1300 to 4000 with a calendar or the like.
- the living body lumen graft base material of the present invention is a woven fabric (base material) in which fibers having a single filament fineness of less than 0.1 dtex (total fineness: 1 to 80 dtex) are woven at a low density by lowering the weave density. It is obtained by performing a press process (preferably a press process by a calendar). Thereby, transportation with a small-diameter catheter becomes possible. Moreover, since the mutual filling action of the ultrafine fibers having small inter-fiber voids is effectively expressed by the press processing, the target low water permeability can be achieved even though the thickness is thin. Further, by using a high molecular weight polymer, the fiber itself exhibits a remarkable durability performance in terms of tensile strength and hydrolysis resistance, and it is possible to achieve good burst strength and retention.
- the surface area of the fibers increases, so that the frictional force between the fibers can be increased and the slippage of the stitches can be lowered. Since such a deformation force can be absorbed, holes and deformation due to misalignment between fibers are small, and blood leakage from the sewn portion after the stent is sewn can be well prevented.
- the biological lumen graft substrate of the present invention has sufficient flexibility, strength, and low water permeability even if it is thin. For this reason, the living body lumen graft of the present invention using such a graft substrate can be inserted into a thin catheter, and treatment with the living body lumen graft can be performed with less invasiveness.
- X to Y indicating a range means “X or more and Y or less”, “weight” and “mass”, “weight%” and “mass%”, “part by weight” and “weight part”. “Part by mass” is treated as a synonym. Unless otherwise specified, measurement of operation and physical properties is performed under conditions of room temperature (20 to 25 ° C.) / Relative humidity 40 to 50%.
- the living body lumen graft substrate of the present invention includes fibers having a total fineness of 1 to 80 dtex and a single yarn fineness of less than 0.1 dtex. Therefore, the biological lumen graft substrate of the present invention may contain other fibers (that is, fibers having a total fineness of more than 80 dtex or a single yarn fineness of 0.1 dtex or more). It is preferably composed of only fibers having a total fineness of 1 to 80 dtex and a single yarn fineness of less than 0.1 dtex.
- the fiber constituting the living body lumen graft substrate of the present invention is a multifilament (long fiber).
- a woven fabric made of multifilaments can be deformed and rearranged flexibly by an external force, and softness (flexibility) and wear resistance can be expressed by local displacement of each filament. Therefore, the woven fabric produced from the multifilament is excellent in wear resistance and flexibility.
- the multifilament may be either a non-twisted yarn or a real twisted yarn, or may be a false twisted yarn to which crimps are imparted. In consideration of the order of the gaps between the filament and the multifilament, flexibility, thin film formation, low water permeability, and the like, a non-twisted yarn and a false twisted yarn are preferable.
- the fibers constituting the living body lumen graft substrate of the present invention may be either drawn fibers or undrawn fibers.
- the cross section of the filament constituting the multifilament is not particularly limited, and may be any of a circular cross section, a triangular cross section, a flat cross section, a hollow cross section, etc., but from the viewpoint of flexibility and low water permeability, A circular cross section and a flat cross section are preferred.
- the fibers constituting the living body lumen graft substrate of the present invention are multifilaments.
- the number of filaments constituting the fiber is not particularly limited. However, in consideration of thinning and low water permeability, the fiber is preferably 100 or more multifilaments, and preferably 1000 to 20000 multifilaments. More preferably.
- the fibers constituting the living body lumen graft substrate of the present invention have a total fineness of 1 to 80 dtex and a single yarn fineness of less than 0.1 dtex.
- the total fineness of the fibers constituting the living body lumen graft substrate of the present invention is preferably 10 to 80 dtex, more preferably 30 to 50 dtex.
- the fineness of the single yarn constituting the fibers constituting the living body lumen graft substrate of the present invention is preferably 0.0001 dtex or more and less than 0.1 dtex, more preferably 0.0025 to 0.05 dtex. It is.
- a biological lumen graft substrate formed from such fibers can further reduce bulkiness (thinning) and flexibility.
- at least one of the warp and the weft constituting the living body lumen graft base material should satisfy the above total fineness and single yarn fineness, but both the warp and the weft should satisfy the above total fineness and single yarn fineness. Is preferred.
- the total fineness and single yarn fineness of the warp and weft constituting the living body lumen graft substrate may be the same or different, respectively.
- the weave density of the warps and wefts of the fibers constituting the living body lumen graft substrate of the present invention is not particularly limited, but the weave density of at least one of the warps and wefts of the fibers may be less than 150 / inch. preferable.
- the weave density of at least one of the warps and wefts of the fibers may be less than 150 / inch. preferable.
- the weave density of the other warp and weft is not particularly limited, but the burst strength In view of the improvement of the above, it is preferably 155 to 200 lines / inch, more preferably 170 to 190 lines / inch.
- the weave density of warp and weft is specified by JIS L1096: 2010.
- the material constituting the fiber constituting the living body lumen graft substrate of the present invention is not particularly limited, and the same materials as those used for the living body lumen graft substrate can be used.
- polymer materials such as polyester, polyethylene, polytetrafluoroethylene, polyurethane, polyamide (for example, nylon 6, nylon 66), and nylon can be used. These materials are excellent in biocompatibility.
- polyester particularly polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polytrimethylene terephthalate are preferable, and polyethylene terephthalate (PET) is more preferable.
- the molecular weight of the polymer material is not particularly limited, but the weight average molecular weight is preferably 10,000 to 50,000, and more preferably 13,000 to 35,000.
- the intrinsic viscosity of the polymer material is preferably 0.4 to 2.0, and more preferably 0.6 to 1.2.
- a biological luminal graft base produced from a polymer material (particularly polyester) fiber having such a high molecular weight or intrinsic viscosity can exhibit more excellent strength (burst strength).
- the living body lumen graft substrate of the present invention is composed of fibers having a relatively small single yarn fineness, when manufactured from such high molecular weight polymer material (especially polyester) fibers,
- the strength (burst strength) of the obtained biological lumen graft substrate can be maintained high, which is particularly preferable.
- a biological lumen graft base material is comprised from a hydrolyzable high molecular material like polyester, what has a high molecular weight becomes more preferable from the intensity
- the polymer material satisfies at least one of a weight average molecular weight of 20,000 to 35,000 and an intrinsic viscosity of 0.8 to 1.2.
- a biological luminal graft substrate manufactured from a polymer material (particularly polyester) fiber having such a high molecular weight and / or intrinsic viscosity is less susceptible to a decrease in strength due to hydrolysis.
- the “weight average molecular weight” is a value measured by gel permeation chromatography (Gel Permeation Chromatography, GPC) using polymethyl methacrylate as a standard substance under the following conditions using a GPC apparatus. Shall be adopted.
- the method for producing a fiber having the specific total fineness and single yarn fineness as described above is not particularly limited, and may be obtained by direct spinning or composite spinning using a sea island type or split split type composite die, It may be obtained by making it ultrafine after making it into a woven fabric.
- the method described in JP 2005-095686 A is preferably used. That is, the fiber having a specific total fineness and single yarn fineness according to the present invention is composed of a spinneret for a sea-island type composite fiber, a sea component made of a readily soluble polymer, a hardly soluble polymer, and the easily soluble fiber.
- the island component is not particularly limited, but examples thereof include materials constituting the fibers constituting the living body lumen graft base material.
- the sea component may be any polymer, but a polymer having a dissolution rate ratio with the island component of 200 or more is preferably used.
- fiber-forming polyester, polyamide, polystyrene, polyethylene and the like are preferable.
- polylactic acid, ultra-high molecular weight polyalkylene oxide condensation polymer, polyethylene glycol compound copolymer polyester, polyethylene glycol compound and 5-sodium sulfonic acid isophthalic acid copolymer polyester are suitable as the alkaline aqueous solution-soluble polymer. It is. Nylon 6 is soluble in formic acid, and polystyrene / polyethylene copolymer is very soluble in organic solvents such as toluene.
- the polyester-based polymer is 3 to 10% by weight of 6 to 12 mol% of 5-sodium sulfoisophthalic acid and polyethylene glycol having a molecular weight of 4000 to 12000.
- a copolymerized polyethylene terephthalate copolymer polyester having an intrinsic viscosity of 0.4 to 0.6 is preferred.
- 5-sodium isophthalic acid contributes to improving the hydrophilicity and melt viscosity of the resulting copolymer
- PEG polyethylene glycol
- the sea-island composite fiber of the present invention comprising the sea component polymer and the island component polymer described above preferably has a higher melt viscosity of the sea component during melt spinning than the melt viscosity of the island component polymer.
- the composite weight ratio of the sea components is as low as less than 40%, the islands are joined together, or most of the island components are joined together to form a sea-island type. It is possible to suppress / prevent formation of a different material from the composite fiber.
- a preferable melt viscosity ratio (sea / island) is 1.1 to 2.0, and more preferably within a range of 1.3 to 1.5. If it is this ratio, joining of island components can be suppressed / prevented during the stable melt spinning of the process, and the spinning process can be performed stably.
- the number of island components is preferably 25 or more, more preferably 100 or more, and even more preferably 500 or more.
- the number of island components is preferably 1000 or less.
- the diameter of the island component needs to be 10 to 1000 nm, and preferably 100 to 700 nm.
- the fiber structure itself can be stabilized, the physical properties and the fiber form can be stabilized, and the softness and texture peculiar to ultrafine fibers can be achieved.
- it is preferable that each island component in the cross section of the composite fiber has a uniform diameter, thereby improving the quality and durability of the high multifilament yarn made of fine fibers obtained by removing the sea component.
- the sea-island composite fiber of the present invention preferably has a sea-island composite weight ratio (sea: island) in the range of 40:60 to 5:95, particularly in the range of 30:70 to 10:90. It is preferable that it exists in. If it exists in the said range, the thickness of the sea component between island components can be made thin, the dissolution removal of a sea component will become easy, and the conversion to the fine fiber of an island component will become easy.
- the proportion of the sea component exceeds 40%, the thickness of the sea component becomes too thick.
- the proportion is less than 5%, the amount of the sea component becomes too small and the mutual connection occurs between the islands. May be easier.
- the cut elongation of the island component is larger than the cut elongation of the sea component.
- the sea island type composite fiber cross section of the present invention draws four straight lines having an island component diameter (r) and the fiber cross section passing through the center and having an angular interval of 45 degrees from each other,
- the minimum value (Smin) and the fiber diameter (R) of the distance between the island components on the four straight lines and the maximum value (Smax) of the distance between the islands satisfy the following formulas (I) and (II)
- fine fibers having mechanical strength that can withstand practical use can be obtained.
- the interval between the adjacent island components is excluded through the central portion. More preferably, 0.01 ⁇ Smin / r ⁇ 0.7 and Smax / R ⁇ 0.08. If the Smin / r value is 1.0 or less or the Smax / R value is 0.15 or less, high-speed spinnability when producing the composite fiber can be achieved, and the draw ratio can be increased. The drawn yarn physical properties of the fiber and the mechanical strength of the fine fiber obtained by dissolving and removing the sea component can be improved. Further, if the Smin / r value is 0.001 or more, it is possible to effectively suppress and prevent islands from being joined (sticking).
- the interval between the adjacent island components is preferably 500 nm or less, and preferably in the range of 20 to 200 nm.
- the interval between the island components is 500 nm or less. If so, there is little or no dissolution of the island component while dissolving and removing the sea component that occupies this interval, ensuring the homogeneity of the island component and making the fine fibers formed from the island component suitable for practical use. Can be provided.
- the sea-island type composite fiber can be easily manufactured by the following method, for example. That is, first, a polymer having a high melt viscosity and an easily soluble polymer and a polymer having a low melt viscosity and a hardly soluble polymer are melt-spun so that the former is a sea component and the latter is an island component.
- the relationship between the melt viscosity of the sea component and the island component is important.
- the melt spinneret of the composite fiber is reduced when the melt viscosity of the sea component is small.
- the sea component flows at a high speed in a part of the flow path between the island components, and mutual joining is likely to occur between the islands.
- the first yield point means a partial break point of the sea component (this point is defined as a partial break elongation Ip%), and after the yield point, an island component having a low degree of orientation extends.
- both sea-island components break (this point is referred to as total break elongation It%).
- an appropriate one such as a hollow pin group or a fine hole group for forming an island component can be used.
- an island component extruded from a hollow pin or a fine hole and a sea component flow supplied from a flow path designed to fill the gap are merged, and this combined fluid flow is extruded from a discharge port while being gradually narrowed.
- any spinneret may be used.
- the spinneret described in FIGS. 1 and 2 of JP-T-2005-095686 can be suitably used.
- the discharged sea-island cross-section composite fiber is solidified by cooling air.
- the spinning speed is not particularly limited, but in consideration of productivity and spinning stability, the spinning speed is preferably 400 to 6000 m / min, and more preferably 1000 to 3500 m / min.
- the obtained unstretched fiber is a stretched composite fiber having a desired tensile strength, cutting elongation and heat shrinkage property through a separate stretching process, or is taken up by a roller at a constant speed without being wound once, Any of the methods of winding after passing through the stretching step may be used. Specifically, it is preheated on a preheating roller of 60 to 190 ° C, preferably 75 ° C to 180 ° C, stretched at a draw ratio of 1.2 to 6.0 times, preferably 2.0 to 5.0 times, and set. It is preferable to carry out the heat setting at a roller of 120 to 220 ° C., preferably 130 to 200 ° C.
- the preheating temperature In the case where the preheating temperature is insufficient, the desired high-magnification stretching cannot be achieved. If the set temperature is too low, the shrinkage rate of the obtained drawn fiber is too high, which is not preferable. On the other hand, if the set temperature is too high, the physical properties of the obtained drawn fiber are remarkably lowered.
- the fiber prior to neck stretching (orientation crystallization stretching) with ordinary so-called orientation crystallization is performed. It is preferable to employ a fluid drawing process in which only the fiber diameter is refined without changing the structure.
- both the sea component polymer and the island component polymer are polymers having a glass transition temperature of 100 ° C. or less, and in particular, polyesters such as PET, PBT, polylactic acid, and polytrimethylene terephthalate. Is preferably used.
- the drawn composite fiber is immersed in a hot water bath in the range of 60 to 100 ° C., preferably 60 to 80 ° C., and uniformly heated, while the draw ratio is 10 to 30 times and the supply speed is 1 to 10 m. / Min, the winding speed is preferably 300 m / min or less, particularly preferably in the range of 10 to 300 m / min. If the preheating temperature is insufficient and the stretching speed is too high, the desired high-magnification stretching cannot be achieved.
- the predrawn fiber that has been predrawn in the fluidized state is oriented, crystallized and drawn at a temperature of 60 to 150 ° C. in order to improve its mechanical properties such as high elongation. If the stretching conditions are outside the above range, the physical properties of the resulting fiber will be insufficient.
- the draw ratio can be set according to melt spinning conditions, fluid drawing conditions, orientation crystallization stretching conditions, and the like. Generally, the maximum draw ratio that can be stretched under the orientation crystallization stretching conditions is 0.6 to It is preferable to set to 0.95 times.
- the CV% value representing the variation in fineness of fine single fibers having a diameter of 10 to 1000 nm obtained by dissolving and removing sea components from the sea-island composite fiber of the present invention is preferably 0 to 25%. More preferably, it is 0 to 20%, and further preferably 0 to 15%.
- a low CV value means that there is little variation in fineness.
- the tensile strength of a fine fiber bundle obtained by dissolving and removing sea components from the sea-island type composite fiber of the present invention and comprising fine fibers having a diameter of 10 to 1000 nm is 1.0 to 7.0 cN / dtex, and its elongation to break
- the rate is preferably 15 to 70%, and the dry heat shrinkage at 150 ° C. is preferably 5 to 15%. It is important that the physical properties of the fine fiber bundle, particularly the tensile strength, is 1.0 cN / dtex or more.
- the fabric according to the present invention is a fabric composed of a fabric (preferably composed of) the fiber (yarn) according to the present invention as described above or manufactured by the above method, and the living body of the present invention. Construct a luminal graft substrate.
- the structure of the fabric is not particularly limited, and a structure similar to that used as a normal graft substrate such as a knitted nonwoven fabric can be applied in the same manner. However, in consideration of thinning and strength (burst strength), the fabric It is preferable that Also, the structure of the woven fabric is not particularly limited, and a structure usually used as a base material for grafts can be similarly applied. Specific examples include plain weave, twill weave, satin weave, and double weave. Of these, plain weave and twill are preferred, and plain weave is more preferred in terms of strength and thinness.
- the form of the fabric is not particularly limited, and may be a form woven in a cylindrical shape other than a general woven fabric on a plane.
- the method for producing the woven fabric according to the present invention is not particularly limited, and a known method can be used.
- a plain weaving method can be used in which the above-mentioned fibers are arranged with every other one to four wefts per warp.
- the apparatus used for producing the fabric according to the present invention is not particularly limited, and a known apparatus can be used in the same manner.
- a shuttleless loom such as a water jet loom, an air jet loom, and a needle loom, a fly shuttle loom, a tappet loom, a dobby loom, a jacquard loom, and the like can be used.
- the woven fabric may be scoured and relaxed as necessary, and heat set with a tenter or the like.
- the fabric according to the present invention is subjected to press treatment by a calendar.
- the surface of the calendar is preferably heated at a temperature equal to or higher than the glass transition point or softening point of the polymer constituting the fiber.
- the heating temperature is not particularly limited, but for example, it is preferable to heat the calender to 120 to 180 ° C. for treatment.
- the nip pressure is preferably 10 to 100 kg / cm, and the processing speed is preferably 2 to 30 m / min.
- At least one surface of the woven fabric according to the present invention may be coated with a film such as a thin polymer material, a porous film, or a nonwoven fabric.
- a film such as a thin polymer material, a porous film, or a nonwoven fabric.
- the cover factor (the amount of yarn per unit area) of the woven fabric according to the present invention is not particularly limited, but is preferably 1300 to 4000 in view of thinning, low water permeability, strength (burst strength), and the like. Preferably, it is 1400-3500, and more preferably 1500-3000. If it is the said range, the textile fabric which concerns on this invention can exhibit sufficient low water permeability and intensity
- the cover factor is calculated by the following formula (III).
- the thickness of the fabric according to the present invention is not particularly limited, but is preferably thin. Specifically, the thickness of the woven fabric according to the present invention is preferably 1 to 90 ⁇ m, more preferably 20 to 80 ⁇ m, and particularly preferably 30 to 70 ⁇ m. With such a thickness, the living body lumen graft substrate of the present invention (hence, the living body lumen graft) can be easily folded and inserted into a thin catheter having an inner diameter of 12 Fr or less (particularly 11 Fr or less). . Moreover, if it is such thickness, the biological lumen graft base material (hence, graft for biological lumen) of this invention has sufficient intensity
- the biological lumen graft substrate of the present invention has low water permeability.
- the biological lumen graft substrate of the present invention is preferably 0 to 500 mL / min / cm 2 , more preferably 0 to 300 mL / min / cm 2 , particularly preferably 0 to 200 mL / min / cm 2.
- water permeability With such a water permeability, blood leakage from the graft substrate can be effectively suppressed / prevented.
- water permeability in the present specification means a value defined by the following examples.
- the living body lumen graft substrate of the present invention has high strength.
- the biological luminal graft substrate of the present invention preferably has a burst strength of 100 to 300N, more preferably 150 to 200N.
- the graft for living body lumen manufactured using the living body lumen graft substrate of the present invention after being placed (fixed) in the aneurysm sufficiently seals the aneurysm and enters the aneurysm.
- the size of the aneurysm can be reduced.
- “Burst intensity” in this specification means a value defined by the following examples.
- the living body lumen graft base material of the present invention has low stitch slippage. More specifically, both the slipping direction in the vertical direction and the horizontal direction (spreading of the sewing needle hole) is 1.5 mm or less, and the average value is preferably 0 to 1.5 mm, more preferably Particularly preferred is 0 to 1.2 mm. If the graft base material has such a low seam slipping property, the spread of the needle hole for sewing is reduced, and blood leakage from the graft base material can be effectively suppressed / prevented.
- the “seam slipperiness” in the present specification means a value defined by the following example (refer to the section for evaluating the expansion of the needle hole for sewing).
- the living body lumen graft substrate of the present invention can be suitably applied to living body lumen grafts.
- the present invention also provides a biological lumen graft substrate of the present invention or a biological lumen graft having a stent and a biological lumen graft substrate produced by the method of the present invention.
- the biological lumen graft of the present invention can be used for, for example, a graft substrate (artificial blood vessel part) of a biological lumen graft, an artificial blood vessel, an artificial trachea, an artificial bronchus, an artificial esophagus, etc. (Artificial blood vessel portion) and can be suitably used for artificial blood vessels.
- the biological lumen graft substrate of the present invention can also be used for medical applications other than those described above. Among the above uses, the biological lumen graft substrate of the present invention can be applied as it is to artificial blood vessels.
- the biological lumen graft substrate of the present invention is applied to a graft substrate (artificial blood vessel portion) of a biological lumen graft
- the present invention is limited to the following. is not.
- a biological lumen graft is a type of artificial blood vessel in which a spring-like metal (stent part) called a stent is attached to an artificial blood vessel, and is compressed and stored in a thin catheter.
- the biological lumen graft substrate of the present invention can be used for an artificial blood vessel portion (graft substrate) of a biological lumen graft.
- the stent portion may be a self-expanding stent, a balloon-expandable stent, or a combination of these (ie, a combination of a balloon-expandable portion and a self-expandable portion).
- the stent material is not particularly limited, and is stainless steel such as SUS304, SUS316L, SUS420J2, SUS630, gold, platinum, silver, copper, nickel, cobalt, titanium, iron, aluminum, tin and nickel-titanium alloy, cobalt-chromium. Metal materials such as alloys, zinc-tungsten alloys, and the like can be preferably used.
- at least one stent is fixed to the biological lumen graft base of the present invention with a suture or the like.
- the application method to a patient when the biological lumen graft substrate of the present invention is used for a biological lumen graft is not particularly limited, and known methods can be similarly applied.
- a biological lumen graft is folded into a small size and stored in a catheter.
- the catheter is then incised 4-5 cm at the base of the patient's leg to expose the femoral artery, inserted into the femoral artery, and introduced to the site of the aneurysm under fluoroscopy.
- the biological lumen graft stored from the catheter is released / expanded and placed (fixed) at the site with the aneurysm.
- the catheter is removed and the femoral artery incision is closed.
- the aneurysm is sealed with a biological luminal graft, reducing the blood pressure in the aneurysm and consequently reducing the size of the aneurysm.
- the above method does not require an abdominal / thoracotomy operation, and since the incision is small, it is a minimally invasive procedure with very little burden on the patient's body.
- Example 1 The total fineness of the island component is made of polyethylene terephthalate (PET) having an intrinsic viscosity of 0.6, the ratio of sea component: island component is 30:70, and sea island type composite fiber having 25 islands is used as a single yarn.
- PET polyethylene terephthalate
- a multifilament fiber having a fiber length of 56 dtex and a single yarn count of 36 was distributed in the warp and weft in a total amount, and a plain weave with a warp density of 145 / inch and a weft density of 118 / inch was woven (base material 1).
- base material 1 In order to remove the sea component of the sea-island type composite fiber from the obtained substrate 1, the alkali was reduced by 32% at 60 ° C.
- the base material (base material 2) thus obtained was pressed at a temperature of 160 ° C., a nip pressure of 40 kg / cm, and a speed of 5 m / min using an ordinary calender machine to obtain a graft base material 1.
- the surface of the woven fabric and the warp and weft cross sections of the obtained graft substrate 1 were observed with a scanning electron microscope SEM. The sea component was completely dissolved and removed, and the total warp fineness was 39 dtex and the total weft fineness was 39 dtex. It was confirmed.
- the single yarn fineness of warps and wefts is 0. It was calculated to be 043 dtex. Moreover, it was 14500 as a result of measuring the weight average molecular weight of the polyethylene terephthalate which comprises.
- the warp density (warp density) is 183 / inch
- the weft density (weft density) is 129 / inch
- the cover factor CF is 1948
- the thickness is 68 ⁇ m
- the water permeability was 57 mL / min / cm 2 and the burst intensity was 178 N.
- the adaptive sheath diameter in the state which attached the stent to this graft base material 1 was 11 Fr.
- the slipperiness of the stitches was 1.4 mm in the vertical direction and 0.8 mm in the horizontal direction, and there was no spread of the needle holes for sewing the base material.
- Example 2 The total fineness of the island component is made of polyethylene terephthalate (PET) having an intrinsic viscosity of 0.6, the ratio of sea component: island component is 30:70, and the island-island composite fiber having 836 islands is a single yarn.
- PET polyethylene terephthalate
- a multi-filament fiber with a fiber length of 56 dtex and 10 single yarns is arranged in the warp and weft in a total amount, and a plain weave with a warp density (warp density) of 145 / inch and a weft density (weft density) of 118 / inch.
- Weft density weft density
- the alkali was reduced by 32% at 60 ° C. with a 2.5% NaOH aqueous solution. Thereafter, conventional wet heat processing and dry heat processing were performed.
- the base material (base material 4) thus obtained was subjected to press treatment at a temperature of 160 ° C., a nip pressure of 40 kg / cm, and a speed of 5 m / min using an ordinary calender machine to obtain a graft base material 2.
- the obtained graft base material 2 was observed with a scanning electron microscope SEM on the surface of the woven fabric and the warp and weft cross sections, the sea components were completely dissolved and removed, and the total warp fineness was 39 dtex and the total weft fineness was 39 dtex. It was confirmed. Based on this total fineness value and the number of single yarns of 8360 (the number of islands of sea-island type composite fibers multiplied by the number of single yarns of sea-island type composite fibers), the single yarn fineness of warps and wefts is 0. Calculated to be 0047 dtex. Moreover, it was 14500 as a result of measuring the weight average molecular weight of the polyethylene terephthalate which comprises.
- the warp weave density is 177 / inch
- the weft density is 128 / inch
- the cover factor CF is 1905
- the thickness is 65 ⁇ m
- the water permeability is 168 mL / min / cm. 2.
- the burst intensity was 157N.
- the adaptive sheath diameter in the state which attached the stent to this graft base material 2 was 11 Fr.
- the slipperiness of the stitches was 1.2 mm in the vertical direction and 1.0 mm in the horizontal direction, and there was no spread of the needle holes for sewing the base material.
- Example 3 The total fineness of the island component is made of polyethylene terephthalate (PET) having an intrinsic viscosity of 1.0, the ratio of sea component: island component is 30:70, and the sea island type composite fiber having 836 islands is used as a single yarn.
- PET polyethylene terephthalate
- a multifilament having a yarn density of 56 dtex and a single yarn count of 10 was distributed in the warp and weft in a total amount to weave a plain weave having a warp density of 145 / inch and a weft density of 118 / inch (base material 5).
- base material 5 base material 5
- the alkali weight was reduced by 32% at 60 ° C.
- the base material (base material 6) thus obtained was subjected to press treatment at a temperature of 160 ° C., a nip pressure of 40 kg / cm, and a speed of 5 m / min using a normal calender machine, thereby obtaining a graft base material 3.
- the sea component was completely dissolved and removed, and the total warp fineness was 39 dtex and the total weft fineness was 39 dtex. It was confirmed.
- the single yarn fineness of warps and wefts is 0. Calculated to be 0047 dtex. Moreover, it was 24700 as a result of measuring the weight average molecular weight of the polyethylene terephthalate which comprises. Further, in the obtained graft substrate 3, the warp weave density is 185 / inch, the weft density is 133 / inch, the cover factor CF is 1986, the thickness is 69 ⁇ m, and the water permeability is 128 mL / min / cm. 2. The burst strength was 180N.
- the adaptive sheath diameter in the state which attached the stent to this graft base material 3 was 11 Fr.
- the slipperiness of the stitches was 1.0 mm in both the vertical direction and the horizontal direction, and there was no spread of the needle hole for sewing the base material.
- the comparative graft substrate 2 thus obtained was subjected to press treatment at a temperature of 150 ° C., a nip pressure of 100 kg / cm, and a speed of 10 m / min using a conventional calender machine, to obtain a comparative graft substrate 2.
- the cover factor CF was 1904
- the thickness was 80 ⁇ m
- the water permeability was 49 mL / min / cm 2
- the burst strength was 176 N.
- the adaptive sheath diameter with the comparative graft substrate 2 attached was 13 Fr. Further, the slippage of the seam was not measured (NA), but there was almost no spread of the needle hole for sewing the base material.
- the comparative graft substrate 3 thus obtained was calendered at a temperature of 150 ° C., a nip pressure of 100 kg / cm, and a speed of 10 m / min using an ordinary calender machine, to obtain a comparative graft substrate 3.
- the cover factor CF was 1608, the thickness was 62 ⁇ m, and the water permeability was 20 mL / min / cm 2 .
- the burst intensity was 149N.
- the adaptive sheath diameter with the comparative graft base 3 attached was 11 Fr. Further, the slipperiness of the stitches was 1.9 mm in the vertical direction and 2.0 mm in the horizontal direction, and the spread of the needle hole was confirmed.
- the comparative graft base material 4 thus obtained was subjected to press treatment at a temperature of 160 ° C., a nip pressure of 40 kg / cm, and a speed of 5 m / min using a normal calender machine to obtain a comparative graft base material 4.
- the total fineness of the island component is made of polyethylene terephthalate (PET) having an intrinsic viscosity of 0.6, the ratio of sea component: island component is 30:70, and the island-island composite fiber having 836 islands is a single yarn.
- PET polyethylene terephthalate
- a multifilament fiber having a fiber length of 56 dtex and 10 single yarns was all arranged in the warp and weft, and a plain weave with a warp density of 145 / inch and a weft density of 118 / inch was woven (base material 7).
- base material 7 base material 7
- the alkali was reduced by 32% at 60 ° C. with a 2.5% NaOH aqueous solution.
- the warp weave density was 165 / inch
- the weft density was 142 / inch
- the cover factor CF was 1917
- the thickness was 100 ⁇ m
- the water permeability was 1573 mL / min / cm 2 and the burst intensity was 129N.
- the adaptive sheath diameter in the state which attached the stent to this comparative graft base material 5 was 11 Fr. The slidability of the seam was not measured, but there was no spread of the needle hole where the base material was sewn.
- Intrinsic viscosity was measured at 35 ° C. at a concentration of 1.2 g / 100 ml using orthochlorophenol as a solvent.
- the weight average molecular weight was measured by gel permeation chromatography (GPC) using polymethyl methacrylate as a standard substance using a GPC apparatus under the following conditions.
- ⁇ Thickness measurement> The total thickness of each graft substrate in the longitudinal direction is measured with a thickness gauge.
- the water permeability of the graft substrate is measured according to ISO 7198. Specifically, each graft substrate is cut into a size of about 2 cm ⁇ 2 cm to prepare a sample. Next, the sample is sandwiched and set in the sample installation portion (hole) 11 in the water permeability measuring device 10 shown in FIG. 1, and the water 12 is allowed to flow while checking the water pressure with the pressure gauge 13, and the water pressure of 120 mmHg When water is applied, the amount of water oozing out from this sample per minute is measured and expressed as water permeability (mL / min / cm 2 ).
- the adaptive sheath size of the graft substrate is measured according to the following method. That is, as shown in FIG. 2A, each graft base material is stitched into a cylindrical shape (diameter: 26 mm, length: 32 mm) to produce the graft 2. Next, five graft-shaped nickel-titanium stents 3 having a diameter of 28 mm are sewn to the graft 2 at intervals of 8 mm. Moreover, the thread
- a SUS wire 5 having a diameter of 1.5 mm as a shaft it is placed in PTFE tubes (sheaths) 6 having various diameters, and sliding force is measured.
- the diameter of the thinnest PTFE tube (sheath) at which the sliding force is 40 N or less is confirmed and set as an adaptive sheath size.
- the sliding force sets a PTFE tube (sheath) in a tensile tester, pulls the graft substrate through the yarn at a speed of 200 mm / min in the PTFE tube, and measures the load. The average value of the load applied for 3 to 5 seconds from the beginning of tension is calculated, and this is defined as the sliding force (N).
- each graft substrate is cut into a size of about 3 cm ⁇ 3 cm to prepare a sample.
- each graft substrate (sample) is set by being sandwiched in a sample installation portion (hole) 21 having a diameter of 11.3 mm of the measuring device 20.
- a pusher (diameter: 11.3 mm) 22 having a spherical tip is pushed into this sample at a speed of 125 mm / min, and a load (N) when the graft base material is broken is measured.
- Stitch format The stitch format is lock stitching; Number of stitches: The number of stitches is 5 stitches / cm; Type of sewing needle: The type of sewing needle is normal needle # 11.
- a tensile tester grab at a grip interval of 7.62 cm, apply a load of 49.0 N (5 kgf) at a tensile speed of 30 cm / min, remove the test piece from the grip, and hold for 1 hour Then, a load (about 20 N) that eliminates the slack in the vicinity of the seam is applied in the direction perpendicular to the seam, and the size of the maximum hole of the seam slip is measured to the unit of 0.1 mm.
- the magnitude of the stitch slip is assumed to be “a + a ′ (mm)” as shown in FIG. 4B. Calculate the average value of 5 times in the vertical and horizontal directions, and round to 1 decimal place.
- vertical slipping means slipping of the weft on the warp
- horizontal slipping means slipping of the warp on the weft.
- the graft 2 is produced by the method described in the method for measuring the adaptive sheath size.
- a thread 4 for sliding the inside of the tube is attached to the end of the cylindrical base material (FIG. 2B).
- a SUS wire 5 having a diameter of 1.5 mm is used as a shaft and placed in a PTFE tube (sheath) having an inner diameter of an adaptive sheath size.
- the graft 2 is pulled out from the PTFE tube with the thread 4, and it is confirmed by using a magnifying glass or the like from the lumen side of the graft 2 whether the seam to which the stent 3 is sewn is expanded.
- a sample cut to a size of about 3 cm ⁇ 3 cm is prepared from each substrate after the hydrolysis treatment. This is measured according to the burst strength measurement method.
- a graph was prepared with the burst intensity of the sample not subjected to hydrolysis treatment as the initial value (after 0 days), the burst intensity value as the vertical axis, and the hydrolysis days at 90 ° C. as the horizontal axis. The results are shown in Table 2 below and FIG.
- the graft substrates 1 to 3 of the present invention have both low water permeability and high strength (burst strength), though the thickness is small.
- the graft substrates 1 to 3 of the present invention can be inserted into an 11 Fr catheter, which is 2 Fr compared to Comparative Example 1 (conventional substrate) and Comparative Example 2 (substrate obtained by calendering the conventional substrate). It is also shown that stent graft system diameter reduction is achieved.
- the slippage of the graft base material 1 of the present invention is 1.4 mm in the vertical direction and 0.8 mm in the horizontal direction. The average value in the vertical direction and the horizontal direction is 1.2 mm.
- the vertical direction is 1.2 mm
- the horizontal direction is 1.0 mm
- the average value of the vertical direction and the horizontal direction is 1.1 mm
- the slippage of the graft base material 3 is 1.0 mm in both the vertical direction and the horizontal direction.
- the graft substrate 3 of the present invention has a burst strength of 180 N, which is higher than the graft substrate 2 of Example 2 using the same fibers. This improvement in burst strength is considered to be achieved by increasing the intrinsic viscosity of PET (higher molecular weight of PET).
- the comparative graft substrate 1 can be inserted only into a catheter up to 13 Fr, although the strength is high.
- the comparative graft substrate 2 is composed of a multifilament yarn having a thick filament (single yarn fineness: 1.6 dtex), although the thickness is reduced, and a cover factor (the amount of yarn per unit area). ) Did not change, the adaptive sheath diameter with the stent attached was not as thin as 13 Fr. Since the comparative graft base material 3 had a reduced cover factor (weaved at a low density), the appropriate sheath diameter could be as small as 11 Fr, but the strength (burst strength, yarn holding strength) decreased.
- the slipperiness of the seam is as high as 1.9 mm in the vertical direction and 2.0 mm in the horizontal direction, and the needle hole of the seam is widened, causing blood leakage (type IV end leak). It is considered that there is a fear.
- the comparative graft substrate 4 has a small cover factor as in Comparative Example 3, the adaptive sheath diameter with the stent attached can be reduced to 11 Fr, and the molecular weight of the yarn material (PET) can be increased.
- PET molecular weight of the yarn material
- the average value of the direction is as high as 1.6 mm, and it is considered that there is a possibility of causing blood leakage (type IV end leak) with the spread of the needle hole of the seam.
- the comparative graft base material 5 is a woven fabric similar to the graft base material 2 but is not calendered. Therefore, the water permeability becomes 1573 mL / min / cm 2 , which causes blood leakage (type IV end leak). It is considered that there is a fear.
- the graft base material 2 of the present invention is made of polyethylene terephthalate having the same weight average molecular weight (having the same intrinsic viscosity value) as that of the comparative graft base material 1 and also has the same cover factor value, but is a thin filament.
- the single yarn fineness of the graft substrate 2 of the present invention is 0.0047 dtex, and the single yarn fineness of the comparative graft substrate 1 is 1.6 dtex). (Strength) is low, and as can be seen from FIG.
- a graft substrate composed of polyethylene terephthalate having a high molecular weight (having a high intrinsic viscosity value) like the graft substrate 3 of the present invention has a high strength (burst strength) and a decrease in strength due to hydrolysis (burst strength). ) Is comparable to that of the comparative graft substrate 1 composed of thick filaments, and it is considered that the resistance to hydrolysis is also improved.
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Abstract
Description
島成分が固有粘度0.6のポリエチレンテレフタレート(PET)からなり、海成分:島成分の比が30:70であり、且つ島数が25である海島型複合繊維を単糸とする、総繊度が56dtexであり単糸本数が36本であるマルチフィラメント繊維を、経糸および緯糸に全量配し、経糸密度145本/inch、緯糸密度118本/inchの平織を製織した(基材1)。得られた基材1から海島型複合繊維の海成分を除去するために、2.5%NaOH水溶液で、60℃にて32%アルカリ減量した。その後、常法の湿熱加工、乾熱加工を行った。このようにして得られた基材(基材2)を通常のカレンダー機にて温度160℃、ニップ圧40kg/cm、速度5m/minでプレス処理することによって、グラフト基材1を得た。得られたグラフト基材1を走査型電子顕微鏡SEMで織物表面および経糸および緯糸断面を観察したところ、海成分は完全に溶解除去されて、経糸総繊度が39dtex、緯糸総繊度が39dtexであることを確認した。この総繊度の値と単糸数である900本(海島型複合繊維の単糸の島数に海島型複合繊維の単糸本数を乗じた数)から経糸および緯糸の単糸繊度はどちらも0.043dtexであると算出された。また、構成しているポリエチレンテレフタレートの重量平均分子量を測定した結果、14500であった。得られたグラフト基材1において、経織密度(経糸密度)は183本/inch、緯織密度(緯糸密度)は129本/inchであり、カバーファクターCFは1948、厚さが68μm、透水率が57mL/min/cm2、バースト強度が178Nであった。また、このグラフト基材1にステントを取り付けた状態での適応シース径は、11Frであった。縫目滑脱性はタテ方向が1.4mm、ヨコ方向が0.8mmであり、基材を縫い付けている針穴の広がりは無かった。
島成分が固有粘度0.6のポリエチレンテレフタレート(PET)からなり、海成分:島成分の比が30:70であり、且つ島数が836である海島型複合繊維を単糸とする、総繊度が56dtexであり単糸本数が10本であるマルチフィラメント繊維を、経糸および緯糸に全量配し、経織密度(経糸密度)145本/inch、緯織密度(緯糸密度)118本/inchの平織を製織した(基材3)。得られた基材3から海島型複合繊維の海成分を除去するために、2.5%NaOH水溶液で、60℃にて32%アルカリ減量した。その後、常法の湿熱加工、乾熱加工を行った。このようにして得られた基材(基材4)を通常のカレンダー機にて温度160℃、ニップ圧40kg/cm、速度5m/minでプレス処理することによって、グラフト基材2を得た。得られたグラフト基材2を走査型電子顕微鏡SEMで織物表面および経糸および緯糸断面を観察したところ、海成分は完全に溶解除去されて、経糸総繊度が39dtex、緯糸総繊度が39dtexであることを確認した。この総繊度の値と単糸数である8360本(海島型複合繊維の単糸の島数に海島型複合繊維の単糸本数を乗じた数)から経糸および緯糸の単糸繊度はどちらも0.0047dtexであると算出された。また、構成しているポリエチレンテレフタレートの重量平均分子量を測定した結果、14500であった。また、得られたグラフト基材2において、経織密度は177本/inch、緯織密度は128本/inchであり、カバーファクターCFは1905、厚さが65μm、透水率が168mL/min/cm2、バースト強度が157Nであった。また、このグラフト基材2にステントを取り付けた状態での適応シース径は、11Frであった。縫目滑脱性はタテ方向が1.2mm、ヨコ方向が1.0mmであり、基材を縫い付けている針穴の広がりは無かった。
島成分が固有粘度1.0のポリエチレンテレフタレート(PET)からなり、海成分:島成分の比が30:70であり、且つ島数が836である海島型複合繊維を単糸とする、総繊度が56dtexであり単糸本数が10本であるマルチフィラメントを、経糸および緯糸に全量配し、経織密度145本/inch、緯織密度118本/inchの平織を製織した(基材5)。得られた基材5から海島型複合繊維の海成分を除去するために、2.5%NaOH水溶液で、60℃にて32%アルカリ減量した。その後、常法の湿熱加工、乾熱加工を行った。このようにして得られた基材(基材6)を通常のカレンダー機にて温度160℃、ニップ圧40kg/cm、速度5m/minでプレス処理することによって、グラフト基材3を得た。得られたグラフト基材3を走査型電子顕微鏡SEMで織物表面および経糸および緯糸断面を観察したところ、海成分は完全に溶解除去されて、経糸総繊度が39dtex、緯糸総繊度が39dtexであることを確認した。この総繊度の値と単糸数である8360本(海島型複合繊維の単糸の島数に海島型複合繊維の単糸本数を乗じた数)から経糸および緯糸の単糸繊度はどちらも0.0047dtexであると算出された。また、構成しているポリエチレンテレフタレートの重量平均分子量を測定した結果、24700であった。また、得られたグラフト基材3において、経織密度は185本/inch、緯織密度は133本/inchであり、カバーファクターCFは1986、厚さが69μm、透水率が128mL/min/cm2、バースト強度が180Nであった。また、このグラフト基材3にステントを取り付けた状態での適応シース径は11Frであった。縫目滑脱性はタテ方向、ヨコ方向ともに1.0mmであり、基材を縫い付けている針穴の広がりは無かった。
総繊度44dtexのポリエチレンテレフタレート(PET)マルチフィラメント(単糸繊度=1.6dtex、固有粘度0.6のポリエチレンテレフタレート(PET)から形成)を紡糸して、経糸163本/inch、緯糸124本/inchの平織を製織した(比較グラフト基材1)。構成しているポリエチレンテレフタレートの重量平均分子量を測定した結果、14900であった。この比較グラフト基材1において、カバーファクターCFが1904、厚さが120μm、透水率が200mL/min/cm2、バースト強度が176Nであった。この比較グラフト基材1を取り付けた状態での適応シース径は13Frであった。また、縫目滑脱性は未測定(NA)だが、基材を縫い付けている針穴の広がりはほとんど無かった。
総繊度44dtexのポリエチレンテレフタレート(PET)マルチフィラメント(単糸繊度=1.6dtex、固有粘度0.6のポリエチレンテレフタレート(PET)から形成)を紡糸して、経糸163本/inch、緯糸124本/inchの平織を製織した(比較グラフト基材2)。構成しているポリエチレンテレフタレートの重量平均分子量を測定した結果、14900であった。このようにして得られた比較グラフト基材2を通常のカレンダー機にて温度150℃、ニップ圧100kg/cm、速度10m/minでプレス処理、比較グラフト基材2を得た。この比較グラフト基材2において、カバーファクターCFが1904、厚さが80μm、透水率が49mL/min/cm2、バースト強度が176Nであった。この比較グラフト基材2を取り付けた状態での適応シース径は13Frであった。また、縫目滑脱性は未測定(NA)だが、基材を縫い付けている針穴の広がりはほとんど無かった。
経糸として総繊度56dtexのポリエチレンテレフタレート(PET)マルチフィラメント(単糸繊度=2.0dtex、固有粘度0.6(重量平均分子量:15000程度)のポリエチレンテレフタレート(PET)から形成)および緯糸として総繊度84dtexのポリエチレンテレフタレート(PET)マルチフィラメント(単糸繊度=2.0dtex、固有粘度0.6のポリエチレンテレフタレート(PET)から形成)を用いて紡糸して、経糸112本/inch、緯糸84本/inchの平織を製織した(比較グラフト基材3)。構成しているポリエチレンテレフタレートの重量平均分子量を測定した結果、15000であった。このようにして得られた比較グラフト基材3を通常のカレンダー機にて温度150℃、ニップ圧100kg/cm、速度10m/minでカレンダー処理、比較グラフト基材3を得た。この比較グラフト基材3において、カバーファクターCFが1608、厚さが62μm、透水率が20mL/min/cm2であった。バースト強度は149Nであった。この比較グラフト基材3を取り付けた状態での適応シース径は11Frであった。また、縫目滑脱性はタテ方向が1.9mm、ヨコ方向が2.0mmであり、針穴の広がりが確認できた。
総繊度44dtexのポリエチレンテレフタレート(PET)マルチフィラメント(単糸繊度=2.2dtex、固有粘度1.0のポリエチレンテレフタレート(PET)から形成)を紡糸して、経糸129本/inch、緯糸119本/inchの平織を製織した(比較グラフト基材4)。このようにして得られた比較グラフト基材4を通常のカレンダー機にて温度160℃、ニップ圧40kg/cm、速度5m/minでプレス処理、比較グラフト基材4を得た。構成しているポリエチレンテレフタレートの重量平均分子量を測定した結果、25000であった。この比較グラフト基材4において、カバーファクターCFが1645、厚さが72μm、透水率371mL/min/cm2であった。また、バースト強度は153Nであった。この比較グラフト基材4を取り付けた状態での適応シース径は11Frであった。また、縫目滑脱性は縦方向に1.4mm、横方向に1.7mmであり、針穴の広がりが確認できた。
島成分が固有粘度0.6のポリエチレンテレフタレート(PET)からなり、海成分:島成分の比が30:70であり、且つ島数が836である海島型複合繊維を単糸とする、総繊度が56dtexであり単糸本数が10本であるマルチフィラメント繊維を、経糸および緯糸に全量配し、経糸密度145本/inch、緯糸密度118本/inchの平織を製織した(基材7)。得られた基材7から海島型複合繊維の海成分を除去するために、2.5%NaOH水溶液で、60℃にて32%アルカリ減量した。その後、常法の湿熱加工、乾熱加工を行い、比較グラフト基材5を得た。得られた比較グラフト基材5を走査型電子顕微鏡SEMで織物表面および経糸および緯糸断面を観察したところ、海成分は完全に溶解除去され、経糸総繊度が39dtex、緯糸総繊度が39dtexであることを確認した。この総繊度の値と単糸数である8360本(海島型複合繊維の単糸の島数に海島型複合繊維の単糸本数を乗じた数)から経糸および緯糸の単糸繊度はどちらも0.0047dtexであると算出された。また、構成しているポリエチレンテレフタレートの重量平均分子量を測定した結果、14500であった。また、得られた比較グラフト基材5において、経織密度は165本/inch、緯織密度は142本/inchであり、カバーファクターCFは1917、厚さが100μm、透水率が1573mL/min/cm2、バースト強度が129Nであった。また、この比較グラフト基材5にステントを取り付けた状態での適応シース径は、11Frであった。縫目滑脱性は未測定だが、基材を縫い付けている針穴の広がりは無かった。
上記実施例及び比較例で得られた、グラフト基材(生体管腔グラフト基材)1~3及び比較グラフト基材1~5について、下記評価を行った。結果を下記表1に示す。
固有粘度は、オルソクロロフェノールを溶媒として使用し、1.2g/100mlの濃度で、35℃で測定した。
重量平均分子量は、GPC装置を用いて、以下の条件にて、ポリメチルメタクリレートを標準物質とするゲル浸透クロマトグラフィー(Gel Permeation Chromatography、GPC)により測定した。
各グラフト基材の長手方向にわたる全厚さをシックネスゲージで測定する。
グラフト基材の透水率を、ISO7198に従い、測定する。具体的には、各グラフト基材を約2cm×2cmの大きさにカットして、サンプルを作製する。次に、図1に示される透水率測定装置10に、このサンプルをサンプル設置部(穴)11に挟み込んでセットして、圧力計13で水圧を確認しながら水12を流して、120mmHgの水圧をかけたときに1分間にこのサンプルから染み出してくる水の量を測定し、透水率(mL/min/cm2)として表す。
下記方法に従って、グラフト基材の適応シースサイズを測定する。すなわち、図2Aに示されるように、各グラフト基材を円筒形(直径:26mm、長さ:32mm)に縫い合わせ、グラフト2を作製する。次に、このグラフト2に、φ28mmのリング状のニッケル-チタン製のステント3を5本、8mmの間隔で縫い付ける。また、この円筒形基材の末端にチューブ内をスライドさせるための糸4をとりつける(図2B)。直径1.5mmのSUS線5をシャフトとして、様々な径のPTFEチューブ(シース)6に入れ、スライディングフォースを測定する。ここで、スライディングフォースが40N以下となる最細のPTFEチューブ(シース)の直径を確認し、適応シースサイズとする。なお、本試験において、スライディングフォースは、引張試験機にPTFEチューブ(シース)をセットして、PTFEチューブ内で200mm/minの速度で、糸を介してグラフト基材を引張り、荷重を測定する。引張りはじめから、3~5秒にかかる荷重の平均値を算出し、これをスライディングフォース(N)とする。
グラフト基材のバースト強度を、ISO7198に従い、測定する。具体的には、各グラフト基材を約3cm×3cmの大きさにカットして、サンプルを作製する。これを、図3に示されるように、各グラフト基材(サンプルを)を測定装置20の直径11.3mmのサンプル設置部(穴)21に挟み込んでセットする。このサンプルに、先端が球状の押し子(直径:11.3mm)22を125mm/minの速度で押し込み、グラフト基材が破れる時の荷重(N)を測定し、これをバースト強度とする。
縫目滑脱性を、JIS L1096 8.23.1 b)(縫目滑脱法 B法)(2010年)に従い、測定する。具体的には、各グラフト基材から、10cm×17cmの試験片をタテ方向及びヨコ方向にそれぞれ5枚採取する。この試験片を中表にして長さの半分に折り、折目を切断し、図4Aのように切断端から1cmのところを下記の条件で縫い合わせる。
縫目形式:縫目形式は、本縫とする;
縫目数:縫目数は、5目/cmとする;
ミシン針の種類:ミシン針の種類は、普通針#11とする。
下記方法に従って、針穴の広がりを確認する。すなわち、前述の適応シースサイズの測定方法に記載されている方法でグラフト2を作製する。次に、この円筒形基材の末端にチューブ内をスライドさせるための糸4をとりつける(図2B)。直径1.5mmのSUS線5をシャフトとして、適応シースサイズの内径を持つPTFEチューブ(シース)に入れる。その後、糸4を持ってPTFEチューブからグラフト2を引き出し、ステント3を縫い付けている縫目が広がっているかについて、グラフト2の内腔側から拡大鏡等を用いて確認する。
(加水分解条件)
約6cm×12cmの大きさにカットした、実施例2、実施例3、比較例1のグラフト基材を各6枚用意する。これを、密閉容器に入れ、さらに十分な量のリン酸緩衝生理食塩水を加えてカットしたグラフト基材を完全に浸漬させ、90℃のオーブンに入れて静置する。静置後7、14、21、28、35、42日後に、基材毎に1枚ずつとりだし、これを水で洗浄したのち、室温で乾燥させる。
加水分解処理後の各基材から、約3cm×3cmの大きさにカットしたサンプルを作製する。これをバースト強度測定の測定方法に従い、バースト強度を測定する。加水分解処理を行っていないサンプルのバースト強度を、初期値(0日後)とし、バースト強度値を縦軸、90℃での加水分解日数を横軸としたグラフを作成した。結果を下記表2及び図6に示す。
Claims (9)
- 総繊度が1~80デシテックスでありかつ単糸繊度が0.1デシテックス未満である繊維を含む織物の少なくとも一方の面がプレス処理されてなる生体管腔グラフト基材。
- 前記プレス処理は、カレンダーによるプレス処理である、請求項1に記載の生体管腔グラフト基材。
- 前記繊維の経糸および緯糸の少なくとも一方の織密度が150本/inch未満であり、カバーファクターが1400~3000である、請求項1または2に記載の生体管腔グラフト基材。
- 前記織物が重量平均分子量が10,000~50,000のポリエステル繊維から構成される、請求項1~3のいずれかに記載の生体管腔グラフト基材。
- 前記織物の厚さが1~90μmである、請求項1~4のいずれかに記載の生体管腔グラフト基材。
- 前記総繊度に相当する繊維は、単糸数が100本以上のマルチフィラメントである、請求項1~5のいずれかに記載の生体管腔グラフト基材。
- 総繊度が1~80デシテックスでありかつ単糸繊度が0.1デシテックス未満である繊維から織物を製造し、前記織物の少なくとも一方の面をカレンダー加工することを有する、生体管腔グラフト基材の製造方法。
- 前記繊維の経糸および緯糸の少なくとも一方の織密度が150本/inch未満である、請求項7に記載の方法。
- 請求項1~6のいずれか1項に記載の生体管腔グラフト基材または請求項7もしくは8に記載の方法によって製造される生体管腔グラフト基材およびステントを有する生体管腔グラフト。
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015080143A1 (ja) * | 2013-11-29 | 2015-06-04 | 東レ株式会社 | 人工血管 |
WO2016159264A1 (ja) * | 2015-04-03 | 2016-10-06 | 旭化成株式会社 | ステントグラフト |
JP2019088548A (ja) * | 2017-11-15 | 2019-06-13 | 国立大学法人京都大学 | 人工気管及びその製造方法 |
WO2020036206A1 (en) | 2018-08-16 | 2020-02-20 | Terumo Kabushiki Kaisha | Cell culture substrate |
JPWO2020195841A1 (ja) * | 2019-03-25 | 2020-10-01 |
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US11299826B2 (en) * | 2018-04-26 | 2022-04-12 | Toray Industries, Inc. | Tubular fabric and base material for medical use using same |
CN114470323B (zh) * | 2022-01-10 | 2023-02-24 | 浙江脉通智造科技(集团)有限公司 | 血管缝合线、人造分支血管及其制备方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004313310A (ja) * | 2003-04-14 | 2004-11-11 | Ube Ind Ltd | 管状の人工器官 |
WO2005095686A1 (ja) | 2004-03-30 | 2005-10-13 | Teijin Fibers Limited | 海島型複合繊維及びその製造方法 |
WO2006014592A1 (en) | 2004-07-07 | 2006-02-09 | Cook Incorporated | Graft, stent graft and method for manufacture |
JP2011229713A (ja) * | 2010-04-28 | 2011-11-17 | Toray Ind Inc | ステントグラフト用基布およびステントグラフト |
JP2011245283A (ja) | 2010-04-28 | 2011-12-08 | Toray Ind Inc | ステントグラフト用基布およびステントグラフト |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6192666A (ja) * | 1984-10-15 | 1986-05-10 | 東レ株式会社 | 人工血管 |
US6689162B1 (en) * | 1995-10-11 | 2004-02-10 | Boston Scientific Scimed, Inc. | Braided composite prosthesis |
US6540773B2 (en) * | 2001-07-03 | 2003-04-01 | Scimed Life Systems, Inc. | Low profile, high stretch knit prosthetic device |
US7000649B2 (en) * | 2002-03-20 | 2006-02-21 | Terumo Kabushiki Kaisha | Woven tubing for stent type blood vascular prosthesis and stent type blood vascular prosthesis using the tubing |
JP4027728B2 (ja) * | 2002-06-21 | 2007-12-26 | 帝人ファイバー株式会社 | ポリエステル系短繊維からなる不織布 |
US20050085894A1 (en) * | 2003-10-16 | 2005-04-21 | Kershner James R. | High strength and lubricious materials for vascular grafts |
US8597342B2 (en) * | 2007-08-24 | 2013-12-03 | Cook Medical Technologies Llc | Textile graft for in situ fenestration |
TWI470125B (zh) * | 2007-12-17 | 2015-01-21 | Dsm Ip Assets Bv | 精紡超高分子量聚乙烯(uhmwpe)的方法、由其製得之uhmwpe多絲紗及其用途 |
US8142501B2 (en) * | 2008-04-21 | 2012-03-27 | The Board Of Regents Of The University Of Texas System | Artificial ligaments and tendons comprising multifilaments and nanofibers and methods for making |
WO2011028397A1 (en) * | 2009-08-24 | 2011-03-10 | Cook Incorporated | Textile-reinforced high-pressure balloon |
ES2537129T3 (es) * | 2009-09-16 | 2015-06-02 | Teijin Limited | Fibra y estructura de fibra |
WO2011136243A1 (ja) * | 2010-04-28 | 2011-11-03 | 東レ株式会社 | ステントグラフト用基布およびステントグラフト |
US8696741B2 (en) * | 2010-12-23 | 2014-04-15 | Maquet Cardiovascular Llc | Woven prosthesis and method for manufacturing the same |
US9243353B2 (en) * | 2011-01-26 | 2016-01-26 | Asahi Kasei Fibers Corp. | Stent grafts |
CN103205859B (zh) * | 2012-01-16 | 2014-08-06 | 杜邦公司 | 包括聚对苯二甲酸丙二酯的经编织物 |
CN105849648B (zh) * | 2013-12-26 | 2019-09-03 | 东丽株式会社 | 低摩擦滑动件及调色剂定影装置用低摩擦加压部件 |
-
2014
- 2014-06-23 US US14/903,144 patent/US9968435B2/en not_active Expired - Fee Related
- 2014-06-23 WO PCT/JP2014/066588 patent/WO2015005105A1/ja active Application Filing
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- 2014-06-23 CN CN201480039277.3A patent/CN105377186A/zh active Pending
- 2014-06-23 JP JP2015526241A patent/JP6091618B2/ja not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004313310A (ja) * | 2003-04-14 | 2004-11-11 | Ube Ind Ltd | 管状の人工器官 |
WO2005095686A1 (ja) | 2004-03-30 | 2005-10-13 | Teijin Fibers Limited | 海島型複合繊維及びその製造方法 |
WO2006014592A1 (en) | 2004-07-07 | 2006-02-09 | Cook Incorporated | Graft, stent graft and method for manufacture |
JP2008505713A (ja) | 2004-07-07 | 2008-02-28 | クック・インコーポレイテッド | グラフト、ステントグラフト、および製造方法 |
JP2011229713A (ja) * | 2010-04-28 | 2011-11-17 | Toray Ind Inc | ステントグラフト用基布およびステントグラフト |
JP2011245283A (ja) | 2010-04-28 | 2011-12-08 | Toray Ind Inc | ステントグラフト用基布およびステントグラフト |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPWO2015080143A1 (ja) * | 2013-11-29 | 2017-03-16 | 東レ株式会社 | 人工血管 |
US10070949B2 (en) | 2013-11-29 | 2018-09-11 | Toray Industries, Inc. | Vascular prosthesis |
WO2015080143A1 (ja) * | 2013-11-29 | 2015-06-04 | 東レ株式会社 | 人工血管 |
JP2020036905A (ja) * | 2015-04-03 | 2020-03-12 | 旭化成株式会社 | ステントグラフト |
WO2016159264A1 (ja) * | 2015-04-03 | 2016-10-06 | 旭化成株式会社 | ステントグラフト |
JPWO2016159264A1 (ja) * | 2015-04-03 | 2017-11-24 | 旭化成株式会社 | ステントグラフト |
CN107405192A (zh) * | 2015-04-03 | 2017-11-28 | 旭化成株式会社 | 支架移植体 |
US10806562B2 (en) | 2015-04-03 | 2020-10-20 | Asahi Kasei Kabushiki Kaisha | Stent graft |
JP2019088548A (ja) * | 2017-11-15 | 2019-06-13 | 国立大学法人京都大学 | 人工気管及びその製造方法 |
JP7066162B2 (ja) | 2017-11-15 | 2022-05-13 | 国立大学法人京都大学 | 人工気管及びその製造方法 |
WO2020036206A1 (en) | 2018-08-16 | 2020-02-20 | Terumo Kabushiki Kaisha | Cell culture substrate |
JPWO2020195841A1 (ja) * | 2019-03-25 | 2020-10-01 | ||
WO2020195841A1 (ja) * | 2019-03-25 | 2020-10-01 | 川澄化学工業株式会社 | カバードステント |
JP7480455B2 (ja) | 2019-03-25 | 2024-05-10 | Sbカワスミ株式会社 | カバードステント |
Also Published As
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JPWO2015005105A1 (ja) | 2017-03-02 |
EP3020368B1 (en) | 2019-04-24 |
US9968435B2 (en) | 2018-05-15 |
US20160135944A1 (en) | 2016-05-19 |
CN105377186A (zh) | 2016-03-02 |
EP3020368A1 (en) | 2016-05-18 |
JP6091618B2 (ja) | 2017-03-08 |
EP3020368A4 (en) | 2017-03-08 |
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