JP6883511B2 - 人工肺および人工肺の製造方法 - Google Patents
人工肺および人工肺の製造方法 Download PDFInfo
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- JP6883511B2 JP6883511B2 JP2017505332A JP2017505332A JP6883511B2 JP 6883511 B2 JP6883511 B2 JP 6883511B2 JP 2017505332 A JP2017505332 A JP 2017505332A JP 2017505332 A JP2017505332 A JP 2017505332A JP 6883511 B2 JP6883511 B2 JP 6883511B2
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- Prior art keywords
- hollow fiber
- fiber membrane
- polymer
- artificial lung
- blood
- Prior art date
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- LNMQRPPRQDGUDR-UHFFFAOYSA-N hexyl prop-2-enoate Chemical compound CCCCCCOC(=O)C=C LNMQRPPRQDGUDR-UHFFFAOYSA-N 0.000 description 1
- 229920006158 high molecular weight polymer Polymers 0.000 description 1
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- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
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- LVQPBIMCRZQQBC-UHFFFAOYSA-N methoxymethyl 2-methylprop-2-enoate Chemical compound COCOC(=O)C(C)=C LVQPBIMCRZQQBC-UHFFFAOYSA-N 0.000 description 1
- SINFYWWJOCXYFD-UHFFFAOYSA-N methoxymethyl prop-2-enoate Chemical compound COCOC(=O)C=C SINFYWWJOCXYFD-UHFFFAOYSA-N 0.000 description 1
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- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
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- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
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- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- YOHLNKAKHLQGPN-UHFFFAOYSA-N propoxymethyl 2-methylprop-2-enoate Chemical compound CCCOCOC(=O)C(C)=C YOHLNKAKHLQGPN-UHFFFAOYSA-N 0.000 description 1
- RPGBCXPLDSDRMQ-UHFFFAOYSA-N propoxymethyl prop-2-enoate Chemical compound CCCOCOC(=O)C=C RPGBCXPLDSDRMQ-UHFFFAOYSA-N 0.000 description 1
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- PNXMTCDJUBJHQJ-UHFFFAOYSA-N propyl prop-2-enoate Chemical compound CCCOC(=O)C=C PNXMTCDJUBJHQJ-UHFFFAOYSA-N 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
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- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 1
- 229940001482 sodium sulfite Drugs 0.000 description 1
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- 238000004528 spin coating Methods 0.000 description 1
- 208000010110 spontaneous platelet aggregation Diseases 0.000 description 1
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- 229920001059 synthetic polymer Polymers 0.000 description 1
- OPQYOFWUFGEMRZ-UHFFFAOYSA-N tert-butyl 2,2-dimethylpropaneperoxoate Chemical compound CC(C)(C)OOC(=O)C(C)(C)C OPQYOFWUFGEMRZ-UHFFFAOYSA-N 0.000 description 1
- VNJISVYSDHJQFR-UHFFFAOYSA-N tert-butyl 4,4-dimethylpentaneperoxoate Chemical compound CC(C)(C)CCC(=O)OOC(C)(C)C VNJISVYSDHJQFR-UHFFFAOYSA-N 0.000 description 1
- NMOALOSNPWTWRH-UHFFFAOYSA-N tert-butyl 7,7-dimethyloctaneperoxoate Chemical compound CC(C)(C)CCCCCC(=O)OOC(C)(C)C NMOALOSNPWTWRH-UHFFFAOYSA-N 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
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- 238000001291 vacuum drying Methods 0.000 description 1
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Images
Classifications
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
- A61M1/16—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis with membranes
- A61M1/1698—Blood oxygenators with or without heat-exchangers
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
- A61M1/16—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis with membranes
- A61M1/1621—Constructional aspects thereof
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
- A61M1/3621—Extra-corporeal blood circuits
- A61M1/3623—Means for actively controlling temperature of blood
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0081—After-treatment of organic or inorganic membranes
- B01D67/0088—Physical treatment with compounds, e.g. swelling, coating or impregnation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/75—General characteristics of the apparatus with filters
- A61M2205/7536—General characteristics of the apparatus with filters allowing gas passage, but preventing liquid passage, e.g. liquophobic, hydrophobic, water-repellent membranes
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61M2207/00—Methods of manufacture, assembly or production
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2315/22—Membrane contactor
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- B—PERFORMING OPERATIONS; TRANSPORTING
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Description
本発明の人工肺を図面を参照しながら以下で説明する。
本発明に係る高分子(アルコキシアルキル(メタ)アクリレート系重合体)は、下記式(I):
本発明の人工肺では、中空糸膜の外表面または内表面が上記したような本発明に係る高分子および溶媒を含む表面張力が40〜55dyn/cmである高分子含有溶液で被覆される。すなわち、本発明は、疎水性高分子材料からなる複数のガス交換用多孔質中空糸膜を有する人工肺の製造方法であって、前記中空糸膜は、内腔を形成する内表面と、外表面とを有しており、下記式(I):
で示されるアルコキシアルキル(メタ)アクリレート由来の構成単位を有する高分子および溶媒を含む表面張力が40〜55dyn/cmである高分子含有溶液で、前記中空糸膜の内腔を形成する内表面または外表面を被覆することを有する、製造方法をも提供する。
デュヌイ氏表面張力計(伊藤製作所製)を用いて測定する。詳細には、鋼線の中央に取付けた細桿の先に白金環を吊し、水平の位置で高分子含有溶液の液面と接触させ、ノブを廻し鋼線を捩って白金環を引上げ液体の表面から離れた瞬間を目盛板と指針で読取り、その値を高分子含有溶液の表面張力(dyn/cm)とする。
で示されるアルコキシアルキル(メタ)アクリレート由来の構成単位を有する高分子を含む被膜で被覆され、かつ耐血漿リーク性能が、15mmHg以下である、人工肺を提供する。
2−メトキシエチルアクリレート(MEA)60g(0.46mol)をメタノール135gに溶解し、四ツ口フラスコに入れ、50℃でN2バブリングを1時間行い、モノマー溶液(1)を調製した。別途、2,2’−アゾビス(4−メトキシ−2,4−ジメチルバレロニトリル)(V−70、和光純薬工業(株)製)0.06gをメタノール5gに溶解して、重合開始剤溶液(1)を調製した。次に、この重合開始剤溶液(1)をモノマー溶液(1)に添加し、50℃で5時間重合反応を行った。所定時間重合後、重合溶液をエタノールに滴下し、析出した重合体(PMEA(1))を回収した。なお、回収した重合体(PMEA(1))の重量平均分子量を測定したところ、310,000であった。
2−メトキシエチルアクリレート(MEA)80g(0.61mol)をメタノール115gに溶解し、四ツ口フラスコに入れ、50℃でN2バブリングを1時間行い、モノマー溶液(2)を調製した。別途、2,2’−アゾビス(4−メトキシ−2,4−ジメチルバレロニトリル)(V−70、和光純薬工業(株)製)0.08gをメタノール5gに溶解して、重合開始剤溶液(2)を調製した。次に、この重合開始剤溶液(2)をモノマー溶液(2)に添加し、50℃で5時間重合反応を行った。所定時間重合後、重合溶液をエタノールに滴下し、析出した重合体(PMEA(2))を回収した。なお、回収した重合体(PMEA(2))の重量平均分子量を測定したところ、420,000であった。
2−メトキシエチルアクリレート(MEA)80g(0.61mol)をメタノール115gに溶解し、四ツ口フラスコに入れ、43℃でN2バブリングを1時間行い、モノマー溶液(3)を調製した。別途、2,2’−アゾビス(4−メトキシ−2,4−ジメチルバレロニトリル)(V−70、和光純薬工業(株)製)0.08gをメタノール5gに溶解して、重合開始剤溶液(3)を調製した。次に、この重合開始剤溶液(3)をモノマー溶液(3)に添加し、43℃で8時間重合反応を行った。所定時間重合後、重合溶液をエタノールに滴下し、析出した重合体(PMEA(3))を回収した。なお、回収した重合体(PMEA(3))の重量平均分子量を測定したところ、490,000であった。
2−メトキシエチルアクリレート(MEA)20g(0.16mol)をトルエン75gに溶解し、四ツ口フラスコに入れ、80℃でN2バブリングを1時間行い、モノマー溶液(4)を調製した。別途、2,2−アゾビスイソブチロニトリル(AIBN,和光純薬工業(株)製) 0.02gをトルエン 5gに溶解して、重合開始剤溶液(4)を調製した。次に、この重合開始剤溶液(4)をモノマー溶液(4)に添加し、80℃で8時間重合反応を行った。所定時間重合後、重合溶液をノルマルヘキサンに滴下し、析出した重合体(PMEA(4))を回収した。なお、回収した重合体(PMEA(4))の重量平均分子量を測定したところ、85,000であった。
メトキシエチルアクリレート(MEA)15g(0.115mol)をメタノール25gに溶解し、四ツ口フラスコに入れ、50℃でN2バブリングを1時間行い、モノマー溶液(5)を調製した。別途、2,2’−アゾビス(4−メトキシ−2,4−ジメチルバレロニトリル)(V−70、和光純薬工業(株)製)0.015gをメタノール3gに溶解して、重合開始剤溶液(5)を調製した。次に、この重合開始剤溶液(5)をモノマー溶液(5)に添加し、窒素ガス雰囲気下にて50℃で5時間重合反応を行った。所定時間重合後、重合溶液をエタノールに滴下し、析出した重合体(PMEA(5))を回収した。なお、回収した重合体(PMEA(5))の重量平均分子量を測定したところ、410,000であった。
上記製造例1で合成したPMEA(1)(重量平均分子量=31万)を、PMEA(1)の濃度が0.1重量%となるように、水とメタノールの混合溶媒(水:メタノールの混合比=95:5(体積比))に分散させ、表面張力が46dyn/cmのコート液(1)を調製した。
上記製造例1で合成したPMEA(1)(重量平均分子量=31万)を、PMEA(1)の濃度が0.1重量%となるように、水とメタノールの混合溶媒(水:メタノールの混合比=85:15(体積比))に分散させ、表面張力が42dyn/cmのコート液(2)を調製した。
上記製造例2で合成したPMEA(2)(重量平均分子量=42万)を、PMEA(2)の濃度が0.1重量%となるように、水とメタノールの混合溶媒(水:メタノールの混合比=95:5(体積比))に分散させ、表面張力が46dyn/cmのコート液(3)を調製した。
上記製造例3で合成したPMEA(3)(重量平均分子量=49万)を、PMEA(3)の濃度が0.1重量%となるように、水とメタノールの混合溶媒(水:メタノールの混合比=95:5(体積比))に分散させ、表面張力が46dyn/cmのコート液(4)を調製した。
上記製造例4で合成したPMEA(4)(重量平均分子量=8.5万)を、PMEA(4)の濃度が0.1重量%となるように、水とメタノールの混合溶媒(水:メタノールの混合比=95:5(体積比))に分散させ、表面張力が46dyn/cmのコート液(5)を調製した。
上記製造例1で合成したPMEA(重量平均分子量=31万)を、PMEA濃度が0.1重量%となるように、水とメタノールとエタノールの混合溶媒(水:メタノール:エタノールの混合比=6:1:3(体積比))に分散させ、表面張力が37dyn/cmのコート液(6)を調製した。
上記製造例1で合成したPMEA(1)(重量平均分子量=31万)を、PMEA(1)の濃度が0.1重量%となるように、水とメタノールとエタノールの混合溶媒(水:メタノール:エタノールの混合比=6:1:3(体積比))に分散させ、表面張力が37dyn/cmのコート液(7)を調製した。
上記実施例1、2及び5の人工肺(1)、(2)及び(5)、比較例1の人工肺(6)、ならびに参考例1の人工肺(7)について、下記方法によって、耐血漿リーク性能を評価した。結果を下記表1に示す。
上記製造例1で合成したPMEA(1)(重量平均分子量=31万)を、PMEA(1)の濃度が0.2重量%となるように、水とメタノールの混合溶媒(水:メタノールの混合比=95:5(体積比))に分散させ、表面張力が46dyn/cmのコート液(8)を調製した。
上記製造例2で合成したPMEA(2)(重量平均分子量=42万)を、PMEA(2)の濃度が0.2重量%となるように、水とメタノールの混合溶媒(水:メタノールの混合比=95:5(体積比))に分散させ、表面張力が46dyn/cmのコート液(9)を調製した。
上記製造例3で合成したPMEA(3)(重量平均分子量=49万)を、PMEA(3)の濃度が0.2重量%となるように、水とメタノールの混合溶媒(水:メタノールの混合比=95:5(体積比))に分散させ、表面張力が46dyn/cmのコート液(10)を調製した。
上記製造例4で合成したPMEA(4)(重量平均分子量=8.5万)を、PMEA(4)の濃度が0.2重量%となるように、水とメタノールの混合溶媒(水:メタノールの混合比=95:5(体積比))に分散させ、表面張力が46dyn/cmのコート液(11)を調製した。
上記実施例6〜9で調製したコート液(8)〜(11)について、下記方法によって、PMEA被覆の溶出量をPMEA塗布量の減少率を指標として評価した。結果を下記表2に示す。
上記製造例5で合成したPMEA(5)(重量平均分子量=41万)を、PMEA(5)の濃度が0.05重量%となるように、水とメタノールの混合溶媒(水:メタノールの混合比=95:5(体積比))に分散させ、表面張力が48dyn/cmのコート液(12)を調製した。
上記実施例10で得られた人工肺(8)について、下記方法に従って、抗血栓性を評価した。すなわち、人工肺(8)を体外循環回路(血液循環回路)に組み込み、ヘパリン(0.45単位/ml)添加ヒト新鮮血90mlおよび生理食塩水110mlを混合した希釈ヒト新鮮血(へパリン:0.2単位/ml)で充填した。室温(25℃)で、500ml/minの速度で、人工肺(8)内に希釈ヒト新鮮血を循環させた。循環開始から60分後に、体外循環回路から血液をサンプリングし、血小板数を測定し、循環開始前の血小板数(100%)に対する循環後の血小板数の割合(血小板数維持率)を求めた。その結果、血小板数維持率は、91%であった。
2…ハウジング、
3…中空糸膜、
3a…外面層、
3b…内部層、
3c…内面層、
4,5…隔壁、
12…血液室、
6…血液流入口、
7…血液流出口、
18…高分子、
17…血液室、
20…中空糸膜外部血液灌流型人工肺、
32…血液流通用開口、
31…内側筒状部材、
22…筒状中空糸膜束、
23…ハウジング、
25,26…隔壁、
28…血液流入口、
29…血液流出口、
24…ガス流入口、
27…ガス流出口。
Claims (14)
- 前記中空糸膜は、酸素含有ガスが流れる前記内腔を有する前記内表面と、血液と接触する前記外表面と、を有し、
前記外表面を前記高分子含有溶液で被覆する、請求項1に記載の製造方法。 - 前記高分子は、250,000〜600,000の重量平均分子量を有する、請求項1または2に記載の製造方法。
- 前記内表面と前記外表面との間の肉厚は、20μm以上50μm未満である、請求項1〜3のいずれか1項に記載の製造方法。
- 前記溶媒は、5〜99:1の混合比(体積比)で水及びメタノールから構成される、請求項1〜4のいずれか1項に記載の製造方法。
- 前記中空糸膜は、酸素含有ガスが流れる前記内腔を有する前記内表面と、血液と接触する前記外表面と、を有し、
前記外表面が前記高分子含有溶液で被覆される、請求項6に記載の人工肺。 - 前記高分子は、250,000〜600,000の重量平均分子量を有する、請求項6または7に記載の人工肺。
- 前記内表面と前記外表面との間の肉厚は、20μm以上50μm未満である、請求項6〜8のいずれか1項に記載の人工肺。
- 前記溶媒は、5〜99:1の混合比(体積比)で水及びメタノールから構成される、請求項6〜9のいずれか1項に記載の人工肺。
- 耐血漿リーク性能が、15mmHg以下である、請求項6〜10のいずれか1項に記載の人工肺。
- 前記中空糸膜は、酸素含有ガスが流れる前記内腔を有する前記内表面と、血液と接触する前記外表面と、を有し、
前記外表面が前記高分子を含む被膜で被覆される、請求項12に記載の人工肺。 - 前記高分子は、250,000〜600,000の重量平均分子量を有する、請求項12または13に記載の人工肺。
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