CN201558194U - Suspension type stirring tank type bioreactor for artificial liver microcapsules - Google Patents
Suspension type stirring tank type bioreactor for artificial liver microcapsules Download PDFInfo
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- CN201558194U CN201558194U CN2009202016954U CN200920201695U CN201558194U CN 201558194 U CN201558194 U CN 201558194U CN 2009202016954 U CN2009202016954 U CN 2009202016954U CN 200920201695 U CN200920201695 U CN 200920201695U CN 201558194 U CN201558194 U CN 201558194U
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- artificial liver
- microcapsules
- upper cover
- bioreactor
- main part
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Abstract
The utility model discloses a suspension type stirring tank type bioreactor for artificial liver microcapsules, which comprises an upper cover, a main body, microcapsule liver cells and a magnetic stirrer. The suspension type stirring tank type bioreactor for artificial liver microcapsules forms a vertical cylinder type, performs the buffer action of the common liquid storage pool by the air pressure balancing hole, and makes the microcapsules in the reactor to form the suspension flowing state by the magnetic stirring action, therefore the microcapsules mutually act with the severe hepatitis plasma, and the therapy function on the biological artificial liver is more effectively performed. The utility model can reset the size of the volume proportion of the inner cavity and the outer cavity to expand or contract according to the clinical specific practical requirement, and then is reasonably applied to clinics.
Description
Technical field
This utility model belongs to field of biomedicine technology, relates to a kind of armarium, relates in particular to a kind of core apparatus that is applied to biotype or mixed biology artificial liver treatment: the artificial liver microcapsule suspension stirring pool type bioreactor.
Background technology
Current, the liver failure state of an illness is critical, progress rapidly, case fatality rate is high, is global problem at the treatment of liver failure always.And artificial liver treatment has at present become irreplaceable treatment means of hepatitis gravis liver failure, especially the repertoire that the bioartificial liver in theory can compensatory liver, representing the trend of artificial liver from now on, be faced with huge clinical demand, have potential applicability in clinical practice widely.Bioartificial liver's ultimate principle is that patient's blood or plasma flow are through being loaded with the bioreactor of biological activity cell, in this process, the biological activity cell is finished the metabolism of blood (blood plasma) toxic material on the one hand, simultaneously its synthetic bioactive substance is released into blood, correct interior environment disorder, temporarily substitute the partial function of depleted liver, for winning chance from recovery of body liver or liver transplantation, thereby the reduction mortality reaches therapeutic purposes.
Bioreactor is as the core apparatus of biotype or mixed biology artificial liver treatment, be the place that exogenous hepatocyte and patient's blood plasma exchange, ideal bioreactor should improve the efficient of mass exchange between hepatocyte and the patient's blood plasma as much as possible.Current bioartificial liver devices of having carried out I-III phase clinical verification abroad has BLSS, AMC-BAL, ELAD, MELS, HepatAssist etc., does not reach the clinical efficacy of expection more.Particularly use maximum hollow-fiber bioreactors at present, its cell distribution inequality, poor adhesion and easily agglomerating shortcoming have limited its further development.The hepatocyte microencapsulation is because plurality of advantages such as three-dimensional hepatic cell growth environment and immune buffer action then become the new research direction in artificial liver field.The microencapsulated hepatocyte bioreactor artificial liver support system of relying on the hepatocyte microencapsulation and making up, the unique advantage aspect raising mass exchange efficient can be brought into play bioartificial liver's therapeutical effect more efficiently.The microencapsulated hepatocyte bioreactor is to adopt to solidify bed formula bioreactor at first, but the low perfusion state of a large amount of microencapsulated hepatocytes in it, and high shear, become its great defective.Therefore the current fluidized bed type bioreactor that mostly is makes microcapsule become the suspension flow regime.Yet current many microcapsule suspension type bioreactors of succeeding in developing, its principle is to make microcapsule become the suspension flow regime by certain flow velocity mostly, must there be a pump to drive blood plasma and forms sufficient flow velocity with bigger pump speed, must be equipped with a liquid storage tank like this, between high speed pump speed, play certain cushioning effect from the low speed blood plasma pump speed of human body and promotion microcapsule perfusion.The setting of liquid storage tank certainly will increase external effusive plasma volume, increases for the requirement of the total plasma volume of treatment target, thereby has limited the scope of application of artificial liver treatment.
The utility model content
The purpose of this utility model is at the deficiencies in the prior art, and a kind of artificial liver microcapsule suspension stirring pool type bioreactor is provided.
The purpose of this utility model is achieved through the following technical solutions: a kind of artificial liver microcapsule suspension stirring pool type bioreactor, and it comprises upper cover part, main part, microencapsulated hepatocyte and magnetic stir bar; Wherein, described upper cover part and main part threaded engagement are connected, and upper cover part is provided with liquid-inlet and air equalizer opening; Microencapsulated hepatocyte and magnetic stir bar are contained in the intracavity of being made up of upper cover part and main part; The main part sidewall has a liquid outlet near the bottom, and the main part inwall is provided with the cell screen cloth of being close to inwall at liquid outlet, and this cell screen cloth diameter is greater than the caliber of liquid outlet.
Further, in the hole of described air equalizer opening filter membrane is arranged.Thick 0.22 micron of described filter membrane, filter membrane material is a mixed cellulose ester.
Further, described screen cloth is a nylon material, and the aperture is 600 to 800 orders.The material of described upper cover part and main part is plastics or lucite.
The beneficial effects of the utility model are, artificial liver of the present utility model is three-dimensional column type with microcapsule suspension stirring pool type bioreactor, both played the cushioning effect of common liquid storage tank by air equalizer opening, make that by the magnetic agitation effect microcapsule becomes the suspension flow regime in the reactor again, thereby fully interact, more effectively bring into play bioartificial liver's therapeutical effect with heavy liver blood slurry.The artificial liver that this utility model provides also can specifically be put into practice requirement according to clinical with microcapsule suspension stirring pool type bioreactor, and inside and outside two-chamber volume size ratio is reset, and enlarges or dwindles, thereby more reasonably be applied to clinical.
Description of drawings
Fig. 1 is the perspective view of artificial liver with microcapsule suspension stirring pool type bioreactor;
Fig. 2 is artificial liver microcapsule suspension stirring pool type bioreactor upper cover part and main part sketch map;
Fig. 3 sees sketch map for artificial liver with the side of microcapsule suspension stirring pool type bioreactor;
Fig. 4 is the artificial liver external system supplymentary schematic representation of apparatus of microcapsule suspension stirring pool type bioreactor;
Among the figure, 1, liquid-inlet, 2, air equalizer opening, 3, upper cover part, 4, microencapsulated hepatocyte, 5, main part, 6, liquid outlet, 7, magnetic stir bar, 8, magnetic stirring apparatus, 9, plasma separator, 10, membrane oxygenator, 11, artificial liver microcapsule suspension stirring pool type bioreactor, 12, the immunoadsorption device.
The specific embodiment
As shown in Figure 1, artificial liver microcapsule suspension stirring pool type bioreactor of the present utility model, overall appearance is three-dimensional column type, can be divided into upper cover part 3 and main part two parts about in the of 5.Liquid-inlet 1 and air equalizer opening 2 are arranged on the upper cover part 3, liquid-inlet 1 enters in the reactor cavity for heavy liver blood slurry, and air equalizer opening 2 can be communicated with outside reactor inner chamber and the pond, keeps atmospheric pressure balance inside and outside the pond, air equalizer opening 2 is provided with 0.22 micron filter membrane in the hole, guarantee aseptic condition in the pond.Upper cover part 3 is the outward turning interface, but closely is connected with main part 5 threaded engagement, and upper cover part 3 and the design of main part 5 by the spiral mouth make that packing into of microcapsule is very simple and easy.Microencapsulated hepatocyte 4 and magnetic stir bar 7 are housed in the main part 5, main part 5 sidewalls have a liquid outlet 6, main part 5 inwalls are provided with the cell screen cloth of being close to inwall at liquid outlet 6 places, this cell screen cloth slightly larger in diameter is in the caliber of liquid outlet 6, the cavity wall of being close to bioreactor, screen cloth is a nylon material, and the aperture is 600 to 800 orders.
As shown in Figure 2, upper cover part 3 is the outward turning interface, can closely be connected after rotation by the spiral mouth with main part 5.This bioreactor can be under aseptic condition after opening, magnetic stir bar 7 and microencapsulated hepatocyte 4 after main part 5 is packed sterilization into.
As shown in Figure 1 and Figure 4, this reactor upper cover part 3 has a liquid-inlet 1 and an air equalizer opening 2, wherein the pipeline of liquid-inlet 1 outer junctional membrane oxygenator 10 successively and plasma separator 9 is driven by pump, and cracked ends liquid-inlet 1 does not pump into heavy liver blood slurry in reactor.Air equalizer opening 2 can keep the inside and outside atmospheric pressure balance of reactor with reactor inner chamber and external communications, and air equalizer opening 2 is provided with 0.22 micron filter membrane in the hole, guarantee aseptic condition in the pond.Filter membrane material can be mixed cellulose ester etc.Sidewall of reactor has a liquid outlet 6 near the bottom, and its intracavity side is equipped with the cell filter screen.Cell screen cloth slightly larger in diameter is close to the inwall of bioreactor in the caliber of liquid outlet 6, and screen cloth is a nylon material, and the aperture is 600 to 800 orders.Outwards connect the blood plasma pipeline that returns human body through liquid outlet 6, wherein approach adsorbs immune macromolecular immunoadsorption device 12.This utility model needs supporting use one magnetic stirring apparatus 8, by suitable speed of agitator is set, makes that the hepatocyte microcapsule in the reactor becomes the suspension flow regime.
As shown in Figure 4, the supporting use magnetic stirring apparatus 8 of reactor, liquid-inlet 1 is with the external membrane oxygenator 10 of plastics system blood purification circuit pipe, membrane oxygenator 10 is with the external plasma separator 9 of plastics system blood purification circuit pipe, and liquid outlet 6 is used to adsorb immune macromolecular immunoadsorption device 12 so that plastics system blood purification circuit pipe is external.By the suitable speed of agitator of magnetic stirring apparatus 8 is set, make that the hepatocyte microcapsule in the reactor becomes the suspension flow regime.
The shell of reactor material can be plastics or lucite, and size dimension is: the reactor cavity inside radius is 5cm, removes wall thickness, and the reactor height is 15cm, the about 800ml of intracavity volume.Can or dwindle according to the amplification of clinical practice needs during actual fabrication, make best size.
Artificial liver of the present utility model is compared with microcapsule suspension type bioreactor in the past with microcapsule suspension stirring pool type bioreactor, and advantage is:
The artificial liver that this utility model provides not only can play the effect of reactor with microcapsule suspension stirring pool type bioreactor, can also play the effect of liquid storage tank simultaneously.At first, what this utility model adopted is the magnetic agitation effect, makes microcapsule become the suspension flow regime.Because in experimentation previously, the preparation technology of hepatocyte microcapsule mostly is the AC sodium alginate-chitosan, the ACA sodium alginate-chitose-sodium alginate, APA sodium alginate-poly-D-lysine-sodium alginate, its microcapsule very easily deposits, and is attached on easily together, is difficult to separately.Especially common microcapsule suspension type fluidized bed type bioreactor, its flow velocity of liquid in actual mechanical process is too high then to have very big shearing force influence to microcapsule, and then the microcapsule gathering is agglomerating too slowly, is difficult to separately.This utility model adopts magnetic stirring apparatus, makes microcapsule become the suspension flow regime by stirring action, has then avoided above defective.And in concrete practice process, can select suitable mixing speed at any time, strengthen the operability of reactor according to the microcapsule suspension situation in the bioreactor.In addition, this utility model is by an air equalizer opening, make bioreactor play the cushioning effect of common liquid storage tank simultaneously, reduced the configuration of liquid storage tank in the whole system, thereby reduced external effusive plasma volume, the blood volume of treatment target changes the danger that brings in the therapeutic process thereby reduced, and makes that the safety in the whole artificial liver therapeutic process obtains increasing.
This bioartificial liver uses microcapsule suspension stirring pool type bioreactor, and is reasonable in design, and complete function is operated simple and easyly, and the suitability is strong, has wide range of applications, and has good application prospects.
Claims (5)
1. an artificial liver microcapsule suspension stirring pool type bioreactor is characterized in that, it comprises upper cover part (3), main part (5), microencapsulated hepatocyte (4) and magnetic stir bar (7); Wherein, described upper cover part (3) and main part (5) threaded engagement are connected, and upper cover part (3) is provided with liquid-inlet (1) and air equalizer opening (2); Microencapsulated hepatocyte (4) and magnetic stir bar (7) are contained in the intracavity of being made up of upper cover part (3) and main part (5); Main part (5) sidewall has a liquid outlet (6) near the bottom, and main part (5) inwall locates to be provided with the cell screen cloth of being close to inwall at liquid outlet (6), and this cell screen cloth diameter is greater than the caliber of liquid outlet (6).
2. according to the described artificial liver microcapsule suspension stirring pool type bioreactor of claim 1, it is characterized in that in the hole of described air equalizer opening (2) filter membrane being arranged.
3. according to claim 1 and 2 described artificial liver microcapsule suspension stirring pool type bioreactors, it is characterized in that, thick 0.22 micron of described filter membrane, filter membrane material is a mixed cellulose ester.
4. according to the described artificial liver microcapsule suspension stirring pool type bioreactor of claim 1, it is characterized in that described screen cloth is a nylon material, the aperture is 600 to 800 orders.
5. according to the described artificial liver microcapsule suspension stirring pool type bioreactor of claim 1, it is characterized in that the material of described upper cover part (3) and main part (5) is plastics or lucite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202016954U CN201558194U (en) | 2009-12-14 | 2009-12-14 | Suspension type stirring tank type bioreactor for artificial liver microcapsules |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202016954U CN201558194U (en) | 2009-12-14 | 2009-12-14 | Suspension type stirring tank type bioreactor for artificial liver microcapsules |
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| CN201558194U true CN201558194U (en) | 2010-08-25 |
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| CN2009202016954U Expired - Lifetime CN201558194U (en) | 2009-12-14 | 2009-12-14 | Suspension type stirring tank type bioreactor for artificial liver microcapsules |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101711898B (en) * | 2009-12-14 | 2012-05-23 | 浙江大学 | Microcapsule suspension stirring pool type bioreactor for artificial liver |
-
2009
- 2009-12-14 CN CN2009202016954U patent/CN201558194U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101711898B (en) * | 2009-12-14 | 2012-05-23 | 浙江大学 | Microcapsule suspension stirring pool type bioreactor for artificial liver |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100825 Effective date of abandoning: 20091214 |