WO2014109185A1 - 脱細胞化血管シートを用いた人工血管 - Google Patents
脱細胞化血管シートを用いた人工血管 Download PDFInfo
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- WO2014109185A1 WO2014109185A1 PCT/JP2013/083749 JP2013083749W WO2014109185A1 WO 2014109185 A1 WO2014109185 A1 WO 2014109185A1 JP 2013083749 W JP2013083749 W JP 2013083749W WO 2014109185 A1 WO2014109185 A1 WO 2014109185A1
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- blood vessel
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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
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
-
- 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
- A61F2/062—Apparatus for the production of blood vessels made from natural tissue or with layers of living cells
-
- 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
- A61L27/36—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix
- A61L27/3604—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix characterised by the human or animal origin of the biological material, e.g. hair, fascia, fish scales, silk, shellac, pericardium, pleura, renal tissue, amniotic membrane, parenchymal tissue, fetal tissue, muscle tissue, fat tissue, enamel
- A61L27/3625—Vascular tissue, e.g. heart valves
-
- 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
- A61L27/36—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix
- A61L27/3683—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix subjected to a specific treatment prior to implantation, e.g. decellularising, demineralising, grinding, cellular disruption/non-collagenous protein removal, anti-calcification, crosslinking, supercritical fluid extraction, enzyme treatment
-
- 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
-
- 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
- A61L27/54—Biologically active materials, e.g. therapeutic substances
-
- 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
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0063—Three-dimensional shapes
- A61F2230/0069—Three-dimensional shapes cylindrical
-
- 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
- A61F2240/00—Manufacturing or designing of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2240/001—Designing or manufacturing processes
- A61F2240/002—Designing or making customized prostheses
-
- 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
- A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
- A61L2300/20—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices containing or releasing organic materials
- A61L2300/252—Polypeptides, proteins, e.g. glycoproteins, lipoproteins, cytokines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
- Y10T156/1036—Bending of one piece blank and joining edges to form article
- Y10T156/1038—Hollow cylinder article
Definitions
- the present invention relates to an artificial blood vessel used for blood vessel transplantation and a method for producing the same.
- Coronary artery and peripheral vascular atherosclerosis are treated by surgical replacement or bypass surgery.
- Autografts are the preferred replacement grafts for affected areas less than 5 mm in diameter, and the most commonly used grafts are the internal thoracic artery, radial artery, and saphenous vein with good patency. It is known that there is. However, invasion for harvesting the graft cannot be avoided, its length and quality vary from case to case, and in the case of reoperative cases, the graft may already be used and cannot be supplied. There is.
- the problem to be solved by the present invention is that it can be transplanted into a small-diameter blood vessel, can be set to an arbitrary diameter, the invasiveness at the time of harvesting the graft has been improved, and the problem of graft supply has been overcome It is to provide an artificial blood vessel.
- the inventors of the present invention have processed animal-derived blood vessels into a sheet and then performed decellularization treatment, or animal-derived blood vessels have been decellularized.
- the sheet is processed into a sheet (decellularized blood vessel sheet) later, when the sheet is molded into a roll structure, the portion that comes into contact with the blood flowing inside is composed of an intimal tissue lined with a medial tissue, The part where the sheets overlap (the part to be glued) removes the intimal tissue, and after processing the sheet to be composed of the medial tissue, the artificial blood vessel formed into a roll structure with a biological tissue adhesive has pressure resistance and The inventors have found that the patency after transplantation is excellent, and have completed the present invention.
- the present invention is a decellularized tubular structure obtained by molding a decellularized sheet-like blood vessel (decellularized blood vessel sheet) into a roll structure, and an artificial blood vessel produced by a biological tissue adhesive,
- the portion in contact with the blood flowing in the artificial blood vessel is composed of an intimal tissue lined with a medial tissue, and the sheet overlaps when the sheet is molded into a roll structure (gluing portion)
- the present invention also includes a method for manufacturing an artificial blood vessel including the following steps (1) to (5).
- the present invention also relates to an artificial blood vessel kit comprising a decellularized blood vessel sheet or a decellularized tubular structure obtained by molding a decellularized blood vessel sheet into a roll structure, and a biological tissue adhesive,
- the portion in contact with the blood flowing in the blood vessel is composed of an intimal tissue lined with a medial tissue, and when the sheet is molded into a roll structure, the portion where the sheets overlap (glue portion) is composed of the medial tissue.
- the kit may be included
- small-diameter artificial blood vessels can be prepared and transplanted to small-diameter blood vessels such as coronary arteries, and (2) various-diameter blood vessels can be prepared from decellularized blood vessel sheets. Therefore, it is possible to produce an artificial blood vessel suitable for the blood vessel of the transplanted part.
- the blood vessel is derived from a heterogeneous animal, supply problems such as autologous blood vessels and tissue other than the affected part can be obtained.
- Even when using blood vessels derived from different animals immune rejection does not occur or can be greatly suppressed due to the decellularized scaffold.
- FIG. 1 is a photograph at the time of transplantation of the artificial blood vessel of the present invention.
- FIG. 2 is a tissue photograph of the artificial blood vessel wall 3 weeks after the transplantation of the artificial blood vessel of the present invention.
- the present invention includes a decellularized tubular structure obtained by molding a decellularized sheet-like blood vessel (decellularized blood vessel sheet) into a roll structure, and an artificial blood vessel produced by a biological tissue adhesive,
- a decellularized sheet-like blood vessel decellularized blood vessel sheet
- an artificial blood vessel produced by a biological tissue adhesive
- the portion in contact with the blood flowing in the artificial blood vessel is composed of an intimal tissue lined with a media tissue, and when the sheet is molded into a roll structure, the portion where the sheets overlap (glue portion) is the middle
- the artificial blood vessel may include the artificial blood vessel composed of a membrane tissue and having a living tissue adhesive applied to a marginal portion.
- the membranous tissue of the present invention is a layered tissue rich in elastic plates existing under the intima.
- the intimal tissue of the present invention is a tissue composed of endothelial cell supporting tissue (basement membrane) and collagen fibers.
- the biological tissue adhesive of the present invention retains the shape of an artificial blood vessel, and examples thereof include fibrin glue, cyanoacrylate-based polymerizable adhesive, and gelatin glue that crosslinks gelatin and resorcinol with formalin.
- fibrin glue as a biological tissue adhesive is particularly preferred.
- the artificial blood vessel of the present invention is preferably applied from the viewpoint of improving the pressure resistance of the artificial blood vessel after applying fibrinogen to the glued portion and then applying thrombin and fibrinogen. .
- thrombin is 1 U / mL to 160 U / mL when thrombin is applied.
- the fibrinogen is preferably 4 mg / mL to 250 mg / mL when fibrinogen is applied.
- the artificial blood vessel according to the present invention can be produced by appropriately selecting an inner diameter of any size according to the size of the blood vessel at the transplantation site. For example, an inner diameter of about 1 mm to about 20 mm is selected.
- the decellularized blood vessel sheet of the present invention is preferably one obtained by molding an animal-derived blood vessel into a sheet shape, or decellularizing an animal-derived blood vessel and molding it into a sheet shape.
- the blood vessel of the present invention is preferably a blood vessel selected from an artery or a vein.
- the blood vessel is preferably a blood vessel selected from the group consisting of the aorta, carotid artery, internal thoracic artery, radial artery, and gastroepiploic artery.
- the artificial blood vessel of the present invention has an effect of improving the pressure resistance and reducing the adhesion to the tissue when the biological tissue adhesive is coated on the outer peripheral surface of the artificial blood vessel.
- the outer peripheral surface of the blood vessel may be coated.
- the pressure resistance of the artificial blood vessel of the present invention may be appropriately changed according to the transplant site.
- the pressure resistance is preferably 400 mmHg or more.
- the present invention may include a method for manufacturing an artificial blood vessel including the following steps (1) to (5).
- step (3) when fibrin glue is used as a biological tissue adhesive, in the step (3), the step of rubbing fibrinogen into the pasting portion and the thrombin and fibrinogen into the pasting portion. It is preferable to include the process of apply
- the decellularization is a decellularization selected from the group consisting of a high hydrostatic pressure method, a surfactant, an enzyme method, a hypertonic and hypotonic solution method, and a freeze-thaw method. Is preferred.
- the decellularization is preferably decellularization that maintains the basement membrane structure after decellularization.
- the method for producing an artificial blood vessel of the present invention preferably further includes a step of treating with DNase and / or a step of treating with alcohol.
- the present invention relates to a devascularized blood vessel sheet or a decellularized tubular structure obtained by molding a decellularized blood vessel sheet into a roll structure, and an artificial blood vessel kit including a biological tissue adhesive, and
- the portion in contact with the blood flowing through is composed of an intimal tissue lined with a medial tissue, and when the sheet is molded into a roll structure, the portion where the sheets overlap (glue part) is composed of the medial tissue,
- the kit can be included.
- This part was pressed for 5 minutes as a paste, and a sheet was formed into a roll. At this time, only the intimal tissue was exposed on the surface of the artificial blood vessel lumen, and the outer side was wound with the intima tissue to form a double structure.
- the lumen was washed with physiological saline, and a fibrinogen solution and a thrombin solution were sprayed onto the outer periphery of the artificial blood vessel. It was immersed in 100 unit / mL heparin sodium-added physiological saline and sterilized under high pressure.
- One end of the produced artificial blood vessel was clamped with forceps, and a cannula was inserted into the opposite end to ligate.
- a syringe and a manometer were connected to the cannula.
- the physiological saline in the syringe was injected into the artificial blood vessel, and the pressure when the artificial blood vessel burst was measured as the pressure resistance.
- the artificial blood vessel of the present invention is used, for example, in the manufacture of medical materials.
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Abstract
Description
(1)以下の(A)又は(B)のいずれかに記載の脱細胞化血管シートを作製する工程、
(A)動物由来の血管をシート状に成型して血管シートを作製する工程、及び血管シートを脱細胞化して脱細胞化血管シートを作製する工程、
(B)動物由来の血管を脱細胞化して脱細胞化血管を作製する工程、及び脱細胞化血管をシート状に成型して脱細胞化血管シートを作製する工程、
(2)脱細胞化血管シートをロール構造に成型した際に、人工血管内を流れる血液と接する部分は中膜組織で裏打ちされた内膜組織で構成され、該シートをロール構造に成型した際に該シートが重なる部分(糊しろ部分)は内膜組織を除去し、中膜組織で構成される工程、
(3)生体組織接着剤を脱細胞化血管シートの糊しろ部分に塗布する工程、
(4)脱細胞化血管シートをロール構造に成型し、糊しろ部分を貼り合わせて人工血管とする工程、および
(5)工程(4)で得られた人工血管の外周表面を生体組織接着剤でコーティングする工程。
(1)以下の(A)又は(B)のいずれかに記載の脱細胞化血管シートを作製する工程、
(A)動物由来の血管をシート状に成型して血管シートを作製する工程、及び血管シートを脱細胞化して脱細胞化血管シートを作製する工程、
(B)動物由来の血管を脱細胞化して脱細胞化血管を作製する工程、及び脱細胞化血管をシート状に成型して脱細胞化血管シートを作製する工程、
(2)脱細胞化血管シートをロール構造に成型した際に、人工血管内を流れる血液と接する部分は中膜組織で裏打ちされた内膜組織で構成され、該シートをロール構造に成型した際に該シートが重なる部分(糊しろ部分)は内膜組織を除去し、中膜組織で構成される工程、
(3)生体組織接着剤を脱細胞化血管シートの糊しろ部分に塗布する工程、
(4)脱細胞化血管シートをロール構造に成型し、糊しろ部分を貼り合わせて人工血管とする工程、および
(5)工程(4)で得られた人工血管の外周表面を生体組織接着剤でコーティングする工程。
以下、実施例に従い、本願発明を更に詳細に説明するが、下記の実施例に何ら限定されるものではない。
(1)実験方法
ブタ大動脈をシート状に形成し、外膜を全体的に剥離、内膜は全体の1/2から2/3の範囲を剥離した。高静水圧印加法で処理し、DNase液で7日間、アルコールで3日間、クエン酸バッファーで3日間洗浄した。作製した脱細胞化ブタ大動脈シートの表面の水分をふき取り、内膜剥離面(中膜組織露出面)にフィブリノゲン液(ボルヒール)を擦り込み、3分後フィブリノゲン液及び10倍希釈トロンビン液(ボルヒール)を混合塗布した。この部分を糊代として5分間圧着してシートをロール状に成型した。この際、人工血管内腔表面に内膜組織のみが露出するようにし、その外側を中膜組織で巻いて二重構造とした。生理食塩液で内腔を洗浄し、人工血管外周にフィブリノゲン液及びトロンビン液をスプレー塗布した。100単位/mLヘパリンナトリウム加生理食塩液に浸漬し、高圧滅菌処理した。作製した人工血管の一端を鉗子でクランプし、反対側の端部にカニューレを挿入して結紮した。カニューレにはシリンジ及びマノメーターを接続した。シリンジ内の生理食塩水を人工血管内に注入し、人工血管が破裂した際の圧力を耐圧力として測定した。
375±61.2mmHgの耐圧力が得られた(n=4)。
(1)実験方法
麻酔下でヤギの右側頚動脈を露出して一部切除し、実施例1にある方法で作製した人工血管(内径約4mm、長さ約5cm)を吻合して自己血管と置換した。吻合部にフィブリノゲン液を擦り込んだ後に、フィブリノゲン液とトロンビン液をスプレー塗布した。処置中はヘパリンナトリウム添加5%糖液を点滴投与し、頚動脈クランプの3分前にはヘパリンナトリウム300単位/kgを単回静脈内投与した。術後の抗凝固処置は行わなかった。処置後3週目に安楽殺し、処置部を採材して病理検査を行った。
剖検:いずれの人工血管も開存していた。また、内腔には、血栓、閉塞、又は動脈瘤性拡張の徴候のない滑らかな管腔面を示していた。
病理組織検査:人工血管内腔に内皮細胞の層が認められた(図2)。人工血管壁には自己組織が入り込み、内部に毛細血管新生を伴っており,自己血管様の構造に変化していた。
Claims (34)
- 脱細胞化されたシート状の血管(脱細胞化血管シート)をロール構造に成型した脱細胞化管状構造体、及び生体組織接着剤により作製される人工血管であって、
該人工血管において、人工血管内を流れる血液と接する部分は中膜組織で裏打ちされた内膜組織で構成され、該シートをロール構造に成型した際に該シートが重なる部分(糊しろ部分)は中膜組織で構成され、糊しろ部分に生体組織接着剤が塗布されている該人工血管。 - 生体組織接着剤がフィブリン糊である、請求項1に記載の人工血管。
- フィブリノゲンを糊しろ部分に擦り込んだ後にトロンビン及びフィブリノゲンを塗布させている、請求項1又は請求項2に記載の人工血管。
- トロンビンが、1U/mL~160U/mLである、請求項1から請求項3のいずれか一項に記載の人工血管。
- フィブリノゲンが4mg/mL~250mg/mLである、請求項1から請求項4のいずれか一項に記載の人工血管。
- 人工血管の内径が直径約1mm~約20mmである、請求項1から請求項5のいずれか一項に記載の人工血管。
- 脱細胞化血管シートが、動物由来の血管をシート状に成型して脱細胞化したもの、又は動物由来の血管を脱細胞化してシート状に成型したものである、請求項1から請求項6のいずれか一項に記載の人工血管。
- 血管が動脈又は静脈から選択される血管である、請求項1から請求項7のいずれか一項に記載の人工血管。
- 血管が大動脈、頸動脈、内胸動脈、橈骨動脈、及び胃大網動脈からなる群より選択される血管である、請求項8に記載の人工血管。
- 生体組織接着剤が人工血管の外周表面にコーティングされている、請求項1から請求項9のいずれか一項に記載の人工血管。
- 耐圧性が400mmHg以上である、請求項1から請求項10のいずれか一項に記載の人工血管。
- 以下の(1)から(5)の工程を含む人工血管の製造方法:
(1)以下の(A)又は(B)のいずれかに記載の脱細胞化血管シートを作製する工程、
(A)動物由来の血管をシート状に成型して血管シートを作製する工程、及び血管シートを脱細胞化して脱細胞化血管シートを作製する工程、
(B)動物由来の血管を脱細胞化して脱細胞化血管を作製する工程、及び脱細胞化血管をシート状に成型して脱細胞化血管シートを作製する工程、
(2)脱細胞化血管シートをロール構造に成型した際に、人工血管内を流れる血液と接する部分は中膜組織で裏打ちされた内膜組織で構成させ、該シートをロール構造に成型した際に該シートが重なる部分(糊しろ部分)は内膜組織を除去し、中膜組織で構成させる工程、
(3)生体組織接着剤を脱細胞化血管シートの糊しろ部分に塗布する工程、
(4)脱細胞化血管シートをロール構造に成型し、糊しろ部分を貼り合わせて人工血管とする工程、および
(5)工程(4)で得られた人工血管の外周表面を生体組織接着剤でコーティングする工程。 - 生体組織接着剤がフィブリン糊である、請求項12に記載の製造方法。
- 工程(3)において、フィブリノゲンを糊しろ部分に擦り込む工程、及びトロンビン及びフィブリノゲンを糊しろ部分に塗布する工程を含む、請求項12又は請求項13に記載の製造方法。
- トロンビンが、1U/mL~160U/mLである、請求項12から請求項14のいずれか一項に記載の製造方法。
- フィブリノゲンが4mg/mL~250mg/mLである、請求項12から請求項15のいずれか一項に記載の製造方法。
- 人工血管の内径が直径約1mm~約20mmである、請求項12から請求項16のいずれか一項に記載の製造方法。
- 血管が動脈又は静脈から選択される血管である、請求項12から請求項17のいずれか一項に記載の製造方法。
- 血管が大動脈、頸動脈、内胸動脈、橈骨動脈、及び胃大網動脈からなる群より選択される血管である、請求項18に記載の製造方法。
- 脱細胞化が、高静水圧法、界面活性剤、酵素法、高張液低張液法、及び凍結融解法からなる群より選択される脱細胞化である、請求項12から請求項19のいずれか一項に記載の製造方法。
- 脱細胞化が、脱細胞化後に基底膜構造を維持する脱細胞化である、請求項12から請求項20のいずれか一項に記載の製造方法。
- DNaseで処理する工程、及び/又はアルコールで処理する工程をさらに含む、請求項12から請求項21のいずれか一項に記載の製造方法。
- 耐圧性が400mmHg以上である、請求項12から請求項22のいずれか一項に記載の製造方法。
- 脱細胞化血管シート又は脱細胞化血管シートをロール構造に成型した脱細胞化管状構造体、及び生体組織接着剤を含む人工血管用キットであって、
該シートにおいて、人工血管内を流れる血液と接する部分は中膜組織で裏打ちされた内膜組織で構成され、該シートをロール構造に成型した際に該シートが重なる部分(糊しろ部分)は中膜組織で構成される、該キット。 - 生体組織接着剤がフィブリン糊である、請求項24に記載のキット。
- フィブリノゲンを糊しろ部分に擦り込んだ後にトロンビン及びフィブリノゲンを塗布させる、請求項24または請求項25に記載のキット。
- トロンビンが、1U/mL~160U/mLである、請求項24から請求項26いずれか一項に記載のキット。
- フィブリノゲンが4mg/mL~250mg/mLである、請求項24から請求項27のいずれか一項に記載のキット。
- 人工血管の内径が直径約1mm~約20mmである、請求項24から請求項28のいずれか一項に記載のキット。
- 脱細胞化血管シートが、動物由来の血管をシート状に成型して脱細胞化したもの、又は動物由来の血管を脱細胞化してシート状に成型したものである、請求項24から請求項29のいずれか一項に記載のキット。
- 血管が動脈又は静脈から選択される血管である、請求項24から請求項30のいずれか一項に記載のキット。
- 血管が大動脈、頸動脈、内胸動脈、橈骨動脈、及び胃大網動脈からなる群より選択される血管である、請求項31に記載のキット。
- 生体組織接着剤が人工血管の外周表面にコーティングされている、請求項24から請求項32のいずれか一項に記載のキット。
- 耐圧性が400mmHg以上である、請求項24から請求項33のいずれか一項に記載のキット。
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