WO2013060067A1 - 膜式渗透汽化式固定人工生物瓣的方法及装置 - Google Patents

膜式渗透汽化式固定人工生物瓣的方法及装置 Download PDF

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Publication number
WO2013060067A1
WO2013060067A1 PCT/CN2011/084056 CN2011084056W WO2013060067A1 WO 2013060067 A1 WO2013060067 A1 WO 2013060067A1 CN 2011084056 W CN2011084056 W CN 2011084056W WO 2013060067 A1 WO2013060067 A1 WO 2013060067A1
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Prior art keywords
reaction chamber
pervaporation
reaction
fixed
membrane
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PCT/CN2011/084056
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English (en)
French (fr)
Inventor
陈大凯
李�雨
董教明
房圆
田聪
黄峰
陈国明
张晓怡
乐承筠
罗七一
Original Assignee
上海微创医疗器械(集团)有限公司
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Application filed by 上海微创医疗器械(集团)有限公司 filed Critical 上海微创医疗器械(集团)有限公司
Priority to EP11874705.4A priority Critical patent/EP2772227B1/en
Priority to AU2011379710A priority patent/AU2011379710B2/en
Priority to IN900KON2014 priority patent/IN2014KN00900A/en
Priority to BR112014009974-0A priority patent/BR112014009974B1/pt
Publication of WO2013060067A1 publication Critical patent/WO2013060067A1/zh

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/24Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
    • A61F2/2412Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body with soft flexible valve members, e.g. tissue valves shaped like natural valves
    • A61F2/2415Manufacturing methods
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D61/00Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/36Pervaporation; Membrane distillation; Liquid permeation
    • B01D61/362Pervaporation
    • B01D61/3621Pervaporation comprising multiple pervaporation steps

Definitions

  • the present invention relates to a device for immobilizing an artificial biological valve.
  • the invention also relates to a method of immobilizing an artificial bioprosthetic valve. Background technique
  • glutaraldehyde is a classical fixed crosslinking agent, which is widely used in the tanning and preservation of various artificial biological valve materials.
  • the current common method for immobilizing artificial flaps is the common chemical solvent method in which artificial biological valves are chemically reacted in a liquid environment.
  • glutaraldehyde has side effects, that is, the free aldehyde group produced by glutaraldehyde has a cytotoxic effect, causing loss of a large amount of tissue matrix while causing aging of artificial biological valves, changing its biomechanical properties, resulting in postoperative labor.
  • the biological valve is declining.
  • the current improvement in the decline of artificial bioprostheses caused by the above reasons is mainly through screening for more suitable concentrations of glutaraldehyde, treatment time and cross-linking fixed pressure.
  • the intra-tissue pressure at the time of cross-linking can affect the internal configuration of the artificial biological valve leaf, damage the collagen structure, and even cause the collagen fiber to disintegrate, thereby affecting the life and durability of the artificial biological valve. Therefore, zero or low pressure fixation should be used as much as possible, and elastic valve holders should be used to ensure the integrity of the blade tissue of the artificial biological valve and reduce the stress damage. Poor durability is the most important weakness of artificial biological valves, so improving the durability of artificial biological valves is the fundamental direction of developing biological valves.
  • the present invention provides a method and apparatus for membrane pervaporation-fixed artificial biological flaps to overcome the above-mentioned drawbacks of the prior art.
  • the invention provides a membrane pervaporation fixed artificial biological valve device, comprising a liquid storage tank for storing a reaction liquid, a reaction chamber, a fixing fixture for fixing the artificial biological valve, a pervaporation membrane module and a vacuum pump.
  • the fixing fixture is positioned inside the reaction chamber; the pervaporation membrane module is positioned inside the reaction chamber and located upstream of the fixing fixture; the liquid storage tank is connected to the reaction chamber upstream of the reaction chamber; the vacuum pump is in the reaction chamber The downstream is connected to the reaction chamber.
  • the apparatus of the present invention further includes a frame, the liquid reservoir, the reaction chamber and the vacuum pump are both fixed to the frame, wherein the vacuum pump can be fixed to the bottom of the frame.
  • the pervaporation membrane module comprises one or more of a flat pervaporation membrane module, a hollow fiber pervaporation membrane module, and a roll pervaporation membrane module.
  • the apparatus of the present invention further comprises: a stirring motor, a stirring rod and a stirring blade, the stirring rod is fixed to an end of the stirring motor; and the stirring blade is fixed to the stirring rod.
  • the stirring rod and the stirring blade are driven by the stirring motor to agitate the reaction liquid in the liquid storage tank, so that the concentration of the reaction liquid in the liquid storage tank is kept uniform.
  • the agitating motor can be fixed above the frame.
  • the apparatus of the present invention further includes a rotating disk fixed to the end of the rotating electrical machine and located inside the reaction chamber, and a rotating electric machine fixed to the rotating disk.
  • the chemical modification reaction is made more uniform by adjusting the rotational speed of the rotating disk by a rotary motor.
  • the rotating electrical machine can be fixed to the top of the frame.
  • the apparatus of the present invention further includes a heating module assembly that is respectively fixed to the periphery of the liquid storage tank and the reaction chamber to promote vaporization of the reaction liquid.
  • the apparatus of the present invention further comprises a gas-liquid separator and a raffinate tank, the gas-liquid separator being connected to the reaction chamber downstream of the reaction chamber and then connected to a vacuum pump for separating the reaction liquid and the air leaving the reaction chamber Separating for further processing; the raffinate tank is connected to the reaction chamber below the pervaporation membrane module to collect the residual solution after the reaction.
  • the present invention provides a method for membrane-type pervaporation-fixed artificial bioprosthesis using the above apparatus, comprising the steps of: fixing one end of an artificial bioprosthesis to a membrane pervaporation-fixed artificial bioprosthetic device of the present invention On the fixing fixture, the other end is free to sag; the vacuum pump is turned on; the pervaporation membrane module is opened, so that the vaporized reaction liquid enters the reaction chamber and permeates through the pervaporation membrane module to reach the artificial biological valve; and the artificial biological valve is reacted in the reaction chamber for a certain period of time.
  • the reaction solution includes a glutaraldehyde solution.
  • the method of the present invention further comprises the steps of: turning on the stirring motor, driving the stirring rod and the stirring blade to agitate the reaction liquid in the liquid storage tank, so that the reaction liquid in the liquid storage tank Concentration Storage Uniformity
  • the method of the present invention further comprises the steps of: turning on the rotating electrical machine.
  • the chemical modification reaction is made more uniform by adjusting the rotational speed of the rotating disk by a rotary motor.
  • the method of the present invention further comprises the step of: turning on the heating module assembly to promote vaporization of the reaction liquid.
  • the process parameters of the membrane pervaporation type immobilization artificial bioprosthesis according to the present invention are as follows: membrane module permeation rate is 20 to 180 g / (m 2 * hour); reaction chamber pressure is 0 to 5000 Pa The concentration of the glutaraldehyde solution is 0.5 to 50% ; the rotation speed of the stirring rod is 0 to 200 rpm; and the rotation speed of the rotating disk is 0 to 200 rpm.
  • the device and method of the invention ensure the artificial organism by ensuring that the glutaraldehyde monomer enters the reaction region of the artificial biological valve at a constant rate by using the membrane pervaporation method, and at the same time, the reaction region of the artificial biological valve is in a low pressure environment.
  • the valve is in a reaction zone containing a constant concentration of glutaraldehyde and a low pressure environment during the chemical modification process.
  • the device and the method of the invention not only accelerate the chemical modification treatment time of the artificial biological valve, but also enable the artificial biological valve to maintain the collagen fiber texture structure of the artificial biological valve better in the chemical modification process, thereby improving the artificial organism.
  • the overall durability of the flap Moreover, according to the apparatus and method of the present invention, the artificial biological valve undergoes a chemical reaction in a gaseous environment, the chemical reaction is more permeable, and the reaction rate and efficiency are higher.
  • FIG. 1 is a schematic view showing the structure of a membrane type pervaporation-fixed artificial biological valve of the present invention. List of reference signs
  • the membrane pervaporation type fixed artificial biological valve device of the present invention comprises a frame 1, a stirring motor 2, a stirring rod 3, a stirring blade 4, a heating module assembly 5, 10, a rotating electric machine 6, a residual liquid.
  • the reaction chamber and the liquid storage tank 15 are both fixed to the frame 1; the liquid storage tank 15 is connected to the reaction chamber 13 upstream of the reaction chamber 13; the stirring motor 2 is fixed above the frame 1; The stirring rod 3 is fixed to the end of the stirring motor 2; the stirring The blade 4 is fixed on the stirring rod 3 and positioned in the liquid storage tank 15; the heating module assemblies 5 and 10 are respectively fixed to the periphery of the liquid storage tank 15 and the reaction chamber 13 for promoting vaporization of the reaction liquid; 6 is fixed to the top of the frame 1; the rotating disk 8 is fixed to the end of the rotating electrical machine 6 and located inside the reaction chamber 15; the fixing fixture 9 is fixed on the rotating disk 8; the pervaporation membrane module 14 is positioned In the interior of the reaction chamber 13, located upstream of
  • the concentration of glutaraldehyde solution is 0.5 to 50. / o Mixing rod speed 0 - 200 rpm
  • the artificial bioprosthesis was placed in a 0.625% glutaraldehyde solution for 10 days. Placed in a solution of glutaraldehyde for bioprosthetic valve is oscillated by way of the processing speed is 125 rpm 0
  • Example 2 The present invention
  • the stirring rod 3 and the stirring blade 4 are driven by the stirring motor 2 to agitate the 2% glutaraldehyde solution in the liquid storage tank 15, while the vacuum pump 12 is turned on so that the pressure of the reaction chamber 13 is 20 Pa.
  • the pervaporation membrane module 14 is opened such that vaporized glutaraldehyde enters the reaction chamber 13 and permeates through the membrane module 14 to the artificial bioprosthesis, and the permeation rate of the membrane module is stabilized at about 50 g/(m 2 *hour).
  • the present invention 13 ⁇ 89 ⁇ 0.7 92.07 ⁇ 7.5
  • the pervaporation membrane module 10 of the present invention comprises one or more of a flat plate pervaporation membrane module, a hollow fiber pervaporation membrane module, and a roll pervaporation membrane module.
  • the structure of the membrane module is well known in the art and will not be described in detail herein.
  • the invention adopts a device and a method for membrane pervaporation fixed artificial biological valve, which can make the glutaraldehyde monomer enter the reaction region of the artificial biological valve at a constant rate, and at the same time, the reaction region of the artificial biological valve is in a low pressure environment.
  • the artificial biological valve can better preserve the collagen fiber texture structure of the artificial biological valve during the chemical modification process.
  • the device and method according to the present invention not only accelerates the chemical modification treatment time of the artificial biological valve, but also can better protect the collagen fiber texture structure of the artificial biological valve during the chemical modification process, thereby making the artificial biological valve obtained more. Good overall durability.
  • the method and apparatus of the present invention employ glutaraldehyde as a chemical modifier.
  • the apparatus and method of the present invention are equally applicable to other chemical modifiers such as formaldehyde and acetaldehyde.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biomedical Technology (AREA)
  • Cardiology (AREA)
  • Chemical & Material Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Transplantation (AREA)
  • Manufacturing & Machinery (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Prostheses (AREA)

Abstract

一种膜式渗透汽化式固定人工生物瓣的装置及方法,所述装置包括贮存反应液的贮液罐(15),固定人工生物瓣的固定夹具(9),渗透汽化膜组件(14),反应室(13)和真空泵(12),所述固定夹具(9)定位于反应室(13)内部;所述渗透汽化膜组件(14)定位于反应室(13)内部,位于固定夹具(9)的上游;所述贮液罐(15)在反应室(13)的上游连接到反应室(13);所述真空泵(12)在反应室(13)的下游与反应室(13)相连;所述方法包括以下步骤:将人工生物瓣一端固定在所述装置的固定夹具(9)上,另一端自由下垂;开启真空泵(12);开启渗透汽化膜组件(14),使得汽化的反应液进入反应室(13)并渗透通过渗透汽化膜组件(14)到达人工生物瓣;使人工生物瓣在反应室(13)中反应一段时间。

Description

说 明 书 膜式渗透汽化式固定人工生物瓣的方法及装置 技术领域
本发明涉及一种固定人工生物瓣的装置。 另一方面, 本发明还涉 及一种固定人工生物瓣的方法。 背景技术
在人工生物瓣的化学改性剂中,戊二醛是一种经典的固定交联剂, 其被广泛应用于各种人工生物瓣材料的鞣制和保存。 目前固定人工生 物瓣的通用的方法是普通化学溶剂法, 其中人工生物瓣在液态的环境 下进行化学反应。 但是, 戊二醛有副作用, 即由戊二醛所产生的游离 醛基具有细胞毒性作用, 在引起人工生物瓣钙化的同时导致大量组织 基质丢失, 改变了其生物力学特性, 导致术后的人工生物瓣衰败。 目前改善由上述原因导致的人工生物瓣的衰败主要是通过筛选更 合适的戊二醛浓度、 处理时间和交联固定的压力。 但是, 交联固定时 的组织内压力可影响人工生物瓣叶片内部的构型, 损害胶原结构, 甚 至造成胶原纤维崩解, 从而影响人工生物瓣的寿命与耐久性。 因此, 应尽量采用零压或低压固定, 并且采用弹性瓣架, 以保证人工生物瓣 的叶片组织的完整性和减轻应力损伤。 耐久性差是人工生物瓣的最主要弱点, 因此提高人工生物瓣的耐 久性是研制生物瓣的根本方向。
Cheul Lee, Soo Hwan Kim, Seung-Hwa Choi, Yong Jin Kim.等人的 文献" High-concentration glutaraldehyde fixation of bovine pericardium in organic solvent and post-fixation glycine treatment: in vitro material assessment and in vivo anticalcification effect", Eur J Cardiothorac Surg, ϊ 201 1, 39: 381-387分析了戊二醛浓度、处理时间和交联固定的压力对于 人工生物瓣的影响, 并对人工生物瓣进行了力学性能和防钙化方面的 实验。 该文献采用的是普通化学溶剂法。 James D. Olson的文献 " The vapor pressure of pure and aqueous glutaraldehyde" , Fluid Phase Equilibria, 1998 , 150-151 : 713— 720分析 了不同浓度的戊二醛溶液在不同压力下的挥发速度, 显示出戊二醛具 有比较好的挥发性。 该文献提出挥发性的戊二醛也可以对人工生物瓣 进行化学改性。 但是, 该文献未对戊二醛的挥发速度进行控制。 上述文献公开的人工生物瓣在耐久性方面仍存在缺陷。 此外, 在 普通化学溶剂法中, 随着反应时间的加长, 溶液溶度会存在一个衰减 的现象。 而且, 在反应结束后残余的溶液存在处理方面的问题。 发明内容
有鉴于此, 本发明提供了一种膜式渗透汽化式固定人工生物瓣的 方法及装置, 以克服现有技术存在的上述缺陷。 第一方面,本发明提供一种膜式渗透汽化式固定人工生物瓣装置, 包括贮存反应液的贮液罐, 反应室, 固定人工生物瓣的固定夹具, 渗 透汽化膜组件和真空泵。 所述固定夹具定位于反应室内部; 所述渗透 汽化膜组件定位于反应室内部, 位于固定夹具的上游; 所述贮液罐在 反应室的上游连接到反应室; 所述真空泵在反应室的下游与反应室相 连。 通过真空泵和渗透汽化膜组件的共同作用使得贮液罐中的反应液 发生汽化作用, 使汽化的反应液渗透通过膜组件到达固定夹具上的人 工生物瓣, 从而使人工生物瓣发生化学改性反应。 优选地, 本发明的装置还包括机架, 贮液罐、 反应室和真空泵均 固定于机架上, 其中真空泵可固定于机架的底部。 根据本发明, 渗透汽化膜组件包括平板式渗透汽化膜组件, 中空 纤维式渗透汽化膜组件, 卷式渗透汽化膜组件中的一种或多种。 优选地, 本发明的装置还包括: 搅拌电机, 搅拌杆和搅拌叶片, 所述搅拌杆固定于搅拌电机的端部; 所述搅拌叶片固定于搅拌杆上。 通过搅拌电机带动搅拌杆和搅拌叶片来搅拌贮液罐中的反应液, 使贮 液罐中的反应液的浓度保存均一。 所述搅拌电机可固定于机架的上方。 优选地, 本发明的装置还包括旋转盘和旋转电机, 所述旋转盘固 定于旋转电机的端部并位于反应室内部; 所述固定夹具固定在旋转盘 上。 通过旋转电机调节旋转盘的转速使得化学改性反应进行得更加均 匀。 所述旋转电机可固定于机架的顶部。 优选地, 本发明的装置还包括加热模块组件, 所述加热模块组件 分别固定于贮液罐和反应室的外围, 以促进反应液汽化。 优选地, 本发明的装置还包括气液分离器和残液罐, 所述气液分 离器在反应室的下游与反应室相连并继而与真空泵相连, 用于将离开 反应室的反应液与空气分离, 以便进一步处理; 所述残液罐在渗透汽 化膜组件的下方与反应室相连, 以收集反应后残余的溶液。 第二方面, 本发明提供一种利用上述装置膜式渗透汽化式固定人 工生物瓣的方法, 包括以下步骤: 将人工生物瓣一端固定在本发明的 膜式渗透汽化式固定人工生物瓣的装置的固定夹具上, 另一端自由下 垂; 开启真空泵; 开启渗透汽化膜组件, 使得汽化的反应液进入反应 室并渗透通过渗透汽化膜组件到达人工生物瓣; 使人工生物瓣在反应 室中反应一段时间。 所述反应液包括戊二醛溶液。 优选地, 本发明的方法还包括以下步骤: 开启搅拌电机, 带动搅 拌杆和搅拌叶片来搅拌贮液罐中的反应液, 使得贮液罐中的反应液的 浓度保存均一 优选地, 本发明的方法还包括以下步骤: 开启旋转电机。 通过旋 转电机调节旋转盘的转速使得化学改性反应进行得更加均匀。 优选地, 本发明的方法还包括以下步骤: 开启加热模块组件, 以 促进反应液汽化。 优选地, 根据本发明的膜式渗透汽化式固定人工生物瓣的方法的 工艺参数范围如下:膜组件渗透速率为 20〜180 g/(m2*小时); 反应室的 压力为 0〜5000 Pa; 戊二醛溶液浓度为 0.5〜50%; 搅拌杆转速为 0〜 200 rpm; 旋转盘转速为 0〜200 rpm。 本发明的装置及方法通过采用膜式渗透汽化法而使得戊二醛单体 以恒定的速率进入人工生物瓣的反应区域, 同时使得人工生物瓣的反 应区域处在低压环境下, 确保了人工生物瓣在化学改性过程中处在一 个含有恒定戊二醛浓度和低压环境的反应区域中。 本发明的装置及方 法不仅加快的人工生物瓣的化学改性处理时间, 还可以使得人工生物 瓣在化学改性过程中能较好地保持人工生物瓣的胶原纤维纹理结构, 从而提高了人工生物瓣的整体耐久性。 而且, 根据本发明的装置及方法, 人工生物瓣在气态的环境下进 行化学反应, 化学反应渗透性更好, 反应速率和效率更高。 在普通化 学溶剂法中, 随着反应时间的加长, 溶液溶度会存在一个衰减的现象, 而本发明的装置及方法在汽化反应液 (戊二醛) 的同时, 使得进入反 应区域的化学改性剂的浓度等性质永远是恒定的。 而且, 在普通化学 溶剂法中, 由于溶液浓度随时间衰减, 因而反应液的利用效率不高, 此外残余的溶液在反应结束后存在处理方面的问题, 而本发明装置及 方法通过汽化反应液, 最大化反应液的利用效率, 1ml的反应液可以汽 化成 10 mm2的反应面积, 而且残液的处理问题也大大减小。 同时, 由 于反应渗透率的提高, 反应进程也大大加快。 此外, 本发明的方法及装置在人工生物瓣的化学改性方面明显优 于现有技术。 附图说明
图 1 为本发明的膜式渗透汽化式固定人工生物瓣的装置结构示意 图。 附图标记列表
1: 机架; 2: 搅拌电机; 3: 搅拌杆; 4: 搅拌叶片; 5: 加热模块 组件; 6: 旋转电机; 7: 残液罐; 8: 旋转盘; 9: 固定夹具; 10: 加 热模块组件; 11: 气液分离器; 12: 真空泵; 13: 反应室; 14: 渗透 汽化膜组件: 15: 贮液罐。 具体实施方式
下面参照附图详细说明本发明的装置及方法。 实施例是对本发明 的进一步说明, 而不是限制本发明的范围。 为了便于描述, 这里使用了术语 "上游"和 "下游" , "上游" 和 "下游"参照的是在本发明中的反应液 (如戊二醛) 的流动方向。 图 1 为本发明的膜式渗透汽化式固定人工生物瓣的装置结构示意 图。 如图 1 所示, 本发明的膜式渗透汽化式固定人工生物瓣的装置包 括机架 1, 搅拌电机 2, 搅拌杆 3, 搅拌叶片 4, 加热模块组件 5、 10, 旋转电机 6, 残液罐 7, 旋转盘 8, 固定人工生物瓣的固定夹具 9, 气 液分离器 11, 真空泵 12, 反应室 13, 渗透汽化膜组件 14和贮存戊二 醛溶液的贮液罐 15。所述反应室和贮液罐 15均固定于机架 1上; 所述 贮液罐 15在反应室 13的上游与反应室 13相连; 所述搅拌电机 2固定 于机架 1的上方; 所述搅拌杆 3固定于搅拌电机 2的端部; 所述搅拌 叶片 4固定于搅拌杆 3上并定位于贮液罐 15内; 所述加热模块组件 5 和 10分别固定于贮液罐 15和反应室 13的外围,用于促进反应液汽化; 所述旋转电机 6固定于机架 1的顶部;所述旋转盘 8固定于旋转电机 6 的端部并位于反应室 15的内部; 所述固定夹具 9固定在旋转盘 8上; 所述渗透汽化膜组件 14定位于反应室 13的内部, 位于固定夹具 9的 上游; 所述残液罐 7位于渗透汽化膜组件 10的下方, 与反应室 13相 连, 以收集反应后残余的溶液; 所述气液分离器 11 与反应室 13在反 应室 13的下游相连, 以将离开反应室 13的反应液与空气分离, 以便 进一步处理; 所述真空泵 12在下游与气液分离器 11相连并固定于机 架 1的底部。 本发明装置的合适的工艺参数范围如下:
工艺参数 o数值范围
膜组件渗透速率
反应室压力 0— 5000 Pa
戊二醛溶液浓度 0.5〜50。/o 搅拌杆转速 0— 200 rpm
旋转盘转速 0— 200 rpm 实例 1 : 普通化学溶剂法
将人工生物瓣放置在 0.625%的戊二醛溶液中 10天。 对放置在戊 二醛溶液中的人工生物瓣采用回旋振荡的方式进行处理, 转速为 125 rpm0 实例 2 : 本发明
将人工生物瓣一端固定在本发明的膜式渗透汽化式固定人工生物 瓣的装置的固定夹具 9上, 另一端自由下垂。 通过搅拌电机 2带动搅 拌杆 3和搅拌叶片 4来搅拌贮液罐 15中的 2%戊二醛溶液, 同时开启 真空泵 12使得反应室 13的压力为 20 Pa。 接着, 开启渗透汽化膜组件 14 , 使得汽化的戊二醛进入反应室 13并渗透通过膜组件 14到达人工 生物瓣, 膜组件渗透速率稳定在 50g/(m2*小时)左右。 使人工生物瓣在 反应室 13中反应 14小时,在反应过程中通过旋转电机 6调节旋转盘 8 的转速为 120 rpm。 表 1显示了采用根据本发明的膜式渗透汽化式固定人工生物瓣的 装置与采用根据现有技术的化学溶液浸没人工生物瓣的工艺制备的人 工生物瓣的力学性能比较。 从表 1 中可以清楚地看到, 采用根据本发 明的膜式渗透汽化式固定人工生物瓣的装置制备的人工生物瓣的力学 性能有较大提高。 此外, 采用根据本发明的膜式渗透汽化式固定人工 生物瓣的装置制备的人工生物瓣的处理进程大大加快。 表 1
测试方法 拉伸强度 (MPa) 弹性模量 (MPa) 普通化学溶剂法 12·23± 1.1 46.05±4·6
本发明 13 ·89±0.7 92.07±7.5 本发明的渗透汽化膜组件 10包括平板式渗透汽化膜组件, 中空纤 维式渗透汽化膜组件, 卷式渗透汽化膜组件中的一种或几种。 膜组件 的结构是本领域中的公知的, 在此不再详述。 本发明采用膜式渗透汽化式固定人工生物瓣的装置和方法, 可以 使得戊二醛单体以恒定的速率进入人工生物瓣的反应区域, 同时使得 人工生物瓣的反应区域处在低压环境下, 使得人工生物瓣在化学改性 过程中能较好地保存人工生物瓣的胶原纤维纹理结构。 根据本发明的 装置和方法不仅加快人工生物瓣的化学改性处理时间, 而且能够在化 学改性过程中较好得保护人工生物瓣的胶原纤维纹理结构, 从而使制 得的人工生物瓣具有更好的整体耐久性。 在以上描述中, 本发明的方法和装置采用的是戊二醛作为化学改 性剂。 但是, 本发明的装置及方法同样适用于其他化学改性剂, 如甲 醛和乙醛等。 本领域技术人员可以理解, 以上描述只是示例性的。 在不背离发 明的思想和范围的情况下, 本领域技术人员可以对本发明作出多种修 改和变化。

Claims

1. 一种膜式渗透汽化式固定人工生物瓣的装置, 其特征在于包括 贮存反应液的贮液罐, 固定人工生物瓣的固定夹具, 渗透汽化膜组件, 反应室和真空泵, 所述固定夹具定位于反应室内部; 所述渗透汽化膜 组件定位于反应室内部, 位于固定夹具的上游; 所述贮液罐在反应室 的上游连接到反应室; 所述真空泵在反应室的下游与反应室相连。
2. 如权利要求 1所述的膜式渗透汽化式固定人工生物瓣的装置, 其特征在于, 渗透汽化膜组件包括平板式渗透汽化膜组件, 中空纤维 式渗透汽化膜组件, 卷式渗透汽化膜组件中的一种或多种。
3. 如权利要求 1或 2所述的膜式渗透汽化式固定人工生物瓣的装 置, 其特征在于, 所述装置还包括: 搅拌电机, 搅拌杆和搅拌叶片, 所述搅拌杆固定于搅拌电机的端部; 所述搅拌叶片固定于搅拌杆上, 通过搅拌电机带动搅拌杆和搅拌叶片来搅拌贮液罐中的反应液。
4. 如权利要求 1或 2所述的膜式渗透汽化式固定人工生物瓣的装 置, 其特征在于, 所述装置还包括旋转盘和旋转电机, 所述旋转盘固 定于旋转电机的端部并位于反应室内部; 所述固定夹具固定在旋转盘 上, 通过旋转电机调节旋转盘的转速。
5. 如权利要求 1或 2所述的膜式渗透汽化式固定人工生物瓣的装 置, 其特征在于, 所述装置还包括加热模块组件, 所述加热模块组件 分别固定于贮液罐和反应室的外围, 用以促进反应液汽化。
6. 如权利要求 1或 2所述的膜式渗透汽化式固定人工生物瓣的装 置, 其特征在于, 所述装置还包括气液分离器和残液罐, 所述气液分 离器在反应室的下游与反应室相连并继而与真空泵相连, 用于将离开 反应室的反应液与空气分离; 所述残液罐在渗透汽化膜组件的下方与 反应室相连, 以收集反应后残余的溶液。
7. 利用如权利要求 1-6中任一项所述的装置膜式渗透汽化式固定 人工生物瓣的方法, 其特征在于包括以下步骤: 将人工生物瓣一端固 定在所述装置的固定夹具上, 另一端自由下垂; 开启真空泵; 开启渗 透汽化膜组件, 使得汽化的反应液进入反应室并渗透通过渗透汽化膜 组件到达人工生物瓣; 使人工生物瓣在反应室中反应一段时间, 其中 所述反应液包括戊二醛溶液。
8. 如权利要求 7所述的膜式渗透汽化式固定人工生物瓣的方法, 其特征在于, 还包括以下步骤: 开启搅拌电机, 带动搅拌杆和搅拌叶 片来搅拌贮液罐中的反应液。
9. 如权利要求 7所述的膜式渗透汽化式固定人工生物瓣的方法, 其特征在于, 还包括以下步骤: 开启旋转电机, 通过旋转电机调节旋 转盘的转速。
10. 如权利要求 7-9 中任一项所述的膜式渗透汽化式固定人工生 物瓣的方法, 其特征在于, 在以下工艺参数范围内执行所述方法: 膜 组件渗透速率为 20〜180 g/(m2'小时); 反应室的压力为 0〜5000 Pa; 戊 二醛溶液浓度为 0.5〜50°/。; 搅拌杆转速为 0〜200 rpm; 旋转盘转速为 0—200 rpm o
PCT/CN2011/084056 2011-10-27 2011-12-15 膜式渗透汽化式固定人工生物瓣的方法及装置 WO2013060067A1 (zh)

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