WO2004089433A1 - 癒着防止膜およびその製造方法 - Google Patents
癒着防止膜およびその製造方法 Download PDFInfo
- Publication number
- WO2004089433A1 WO2004089433A1 PCT/JP2004/004947 JP2004004947W WO2004089433A1 WO 2004089433 A1 WO2004089433 A1 WO 2004089433A1 JP 2004004947 W JP2004004947 W JP 2004004947W WO 2004089433 A1 WO2004089433 A1 WO 2004089433A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fiber
- adhesion
- producing
- fibrous
- solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- 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
- A61L31/14—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
-
- 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
- A61L31/14—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L31/148—Materials at least partially resorbable by the body
-
- 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
- A61F2210/00—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2210/0004—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof bioabsorbable
Definitions
- the present invention relates to an adhesion preventing film and a method for producing the same. More particularly, the present invention relates to an anti-adhesion film having excellent handling properties and an extremely high cell adhesion suppressing effect, and a method for producing the same. Background art
- a nonwoven fabric made of a biodegradable and absorbable polymer has been proposed as an adhesion-preventing film having good handleability.
- an anti-adhesion film consisting of a film mainly composed of collagen has been proposed.
- Patent Document 3 See, for example, Patent Document 3.
- Aldehydes and isocyanates are used as a crosslinking agent for controlling the degradability of the anti-adhesion film.
- the use of these is undesirable because the decomposition products have an adverse effect in vivo.
- an anti-adhesion membrane composed of a biodegradable and absorbable polymer made of a lactic acid-glycolic acid copolymer and a lactate monoprolactone copolymer, which has no immunological problems, has been proposed (for example, Patent Reference 4). Further, an adhesion preventing film made of a nonwoven fabric of polylactic acid or a lactic acid-glycolic acid copolymer prepared by an electrospinning method has been proposed (for example, see Patent Document 5).
- the nonwoven fabric produced by the electrospinning method has an advantage that the fiber diameter is extremely small, so that the nonwoven fabric has excellent flexibility and good handleability.
- the anti-adhesion membranes that have been proposed up to now have an insufficient effect of preventing adhesion because cells and tissues easily adhere to and penetrate the membrane, and have an effect of inhibiting adhesion of cells and tissues. Therefore, an anti-adhesion film having a high adhesion is desired.
- Patent Document 1 JP-A-10-99422
- Patent Document 2 Japanese Patent Application Laid-Open No. 2003- "19194
- Patent Document 3 JP-A-3-295561
- Patent Document 4 Japanese Patent Application Laid-Open No. 60-14861
- Patent Document 5 US2002Z0173213 Patent Disclosure of the Invention
- the present invention is as follows. 1.
- an adhesion preventing film comprising a fibrous structure of a biodegradable and absorbable polymer
- the average diameter of the fibers forming the fibrous structure is 0.05 to 50 im
- the fiber surface structure of the fibrous structure is An anti-adhesion film having a depression having a diameter of 0.01 to 1 m, wherein the depression occupies 10 to 95% of the fiber surface.
- the fibrous structure is a non-woven fabric.
- the adhesion preventing film according to 1 or 2 wherein the fibrous structure mainly comprises an aliphatic polyester.
- a step of producing a solution in which the fiber-forming polymer is dissolved in a volatile solvent a step of spinning the solution by an electrostatic spinning method, and a step of obtaining a fiber structure accumulated on a collecting substrate.
- a method for producing a fibrous structure comprising a fiber-forming polymer and producing an adhesion preventing film from the fibrous structure, wherein the average diameter of the fibers forming the fibrous structure is 0.05 to 50 m.
- the fiber surface structure of the fibrous structure has a concave portion having a diameter of 0.01 to 1 ⁇ m, and the concave portion occupies 10 to 95% of the fiber surface.
- a method for manufacturing a protective film a method for manufacturing a protective film.
- the volatile solvent is at least one selected from the group consisting of methylene chloride, chloroform, dichloroethane, tetrachloroethane, trichloroethane, dibromomethane, bromoform, tetrahydrofuran, and 1,4-dioxane.
- FIG. 1 shows an example of an apparatus used in an electrostatic spinning method of discharging a spinning solution into an electrostatic field in the production method of the present invention.
- FIG. 2 shows a method of introducing fine droplets of a spinning solution into an electrostatic field in the production method of the present invention. It is an example of an apparatus used in the electrospinning method.
- FIG. 3 shows the surface (2000 times) of the fibrous structure obtained in Example 1.
- FIG. 4 shows the surface (20,000 times) of the fibrous structure obtained in Example 1.
- FIG. 5 shows the results of evaluation of cell adhesion to the fibrous structure obtained in Example 1 ( ⁇ 1,000).
- FIG. 6 shows the surface (8000 times) of the fiber structure obtained in Comparative Example 1.
- FIG. 7 shows the surface (20,000 times) of the fiber structure obtained in Comparative Example 1.
- FIG. 8 shows the results of evaluating cell adhesion to the fibrous structure obtained in Comparative Example 1 ( ⁇ 1,000).
- the fibrous structure used in the present invention refers to a three-dimensional structure formed by laminating one or more fibers, weaving, knitting or other methods.
- the form of the fiber structure preferably include, for example, a nonwoven fabric, a woven fabric, a knitted fabric, a tube, and a mesh.
- a more preferred form is a nonwoven fabric.
- the fiber surface structure of the fiber structure used in the present invention has a recess having a diameter of 0.01 to 1 m. If the diameter of the concave portion is out of the above range, the effect of suppressing tissue adhesion is small, which is not preferable. More preferred is 0.02-0. 5 ⁇ m.
- the depression is on the fiber surface 1
- the recessed portion occupies 10 to 95% of the fiber surface. If the proportion of the dents occupying the fiber surface is out of the above range, the effect of suppressing tissue adhesion is undesirably small.
- the proportion of the recess occupying the fiber surface is preferably between 40 and 95. / o, more preferably 60 to 95%, even more preferably 60 to 80%.
- the adhesion preventing film of the present invention is required to have the fibrous structure. That is, the adhesion preventing film of the present invention is combined with another member which may be formed only of the fibrous structure. May be combined.
- the members to be combined include, for example, a tissue adhesive component for fixing the anti-adhesion film to the affected part of the operation, and a high-strength material for enhancing resistance to suturing.
- the tissue adhesive component is combined, for example, the tissue adhesive component is fixed on one surface of the fibrous structure, and the surface on which the tissue adhesive component is fixed is stuck to the affected part of the operation to fix the adhesion preventing film.
- a structure can be formed by preventing other tissue from adhering to the other surface.
- the average fiber diameter of the fibers forming the fiber structure used in the present invention is preferably 0.05 to 50 im. If the average fiber diameter is smaller than 0.05 jUm, the strength of the fiber structure cannot be maintained, which is not preferable. On the other hand, if the average fiber diameter is larger than 50 m, the flexibility becomes poor, which is not preferable. A more preferred average fiber diameter is from 0.07 to 30 ⁇ m.
- the fibrous structure used in the present invention is mainly composed of a biodegradable and absorbable polymer, since there is no fear that the fibrous structure remains on the biological tissue surface and delays the repair of the tissue.
- Biodegradable and absorbable polymers include synthetic polymers such as polylactic acid, polyglycolic acid, polydioxanone, polycaprolactone, trimethylene carbonate, polybutylene succinate, and copolymers thereof, collagen, chitin, chitosan, and the like. Examples include natural polymers such as alginic acid, hyaluronic acid, starch II, and derivatives thereof. From the viewpoint of antigenicity and quality control, synthetic polymers are preferred.
- aliphatic polyesters are more preferable from the viewpoint of mechanical properties and degradability in vivo, and polylactic acid is particularly preferable. It is more preferable that the weight average molecular weight of the polylactic acid is 100,000 or more from the viewpoint of mechanical strength and biodegradability.
- biodegradable and absorbable polymers may be used alone or in combination.
- the method for producing the fiber structure used in the present invention is not particularly limited as long as it is a method capable of obtaining the fiber having the above-mentioned surface structure, but the electrostatic spinning method is preferable.
- the method of producing by the electrospinning method will be described in detail.
- a solution in which a fiber-forming polymer is dissolved in a volatile solvent is discharged into an electrostatic field formed between the electrodes, and the solution is drawn toward the electrodes by spinning.
- the fibrous structure can be obtained by accumulating the fibrous substance on the collecting substrate.
- the fibrous material means not only a state in which the solvent of the solution has been completely distilled off to form a fibrous structure, but also a state in which the solvent of the solution is still contained.
- the electrode used in the present invention may be any metal, inorganic substance, or organic substance as long as it shows conductivity. Further, a thin film of a metal, an inorganic substance, or an organic substance having conductivity may be provided over an insulator.
- the electrostatic field in the present invention is formed between a pair or a plurality of electrodes, and a high voltage may be applied to any of the electrodes. This includes, for example, two high voltage electrodes with different voltage values (for example, 15 kV and 1 OkV) and a total of three electrodes connected to earth, or more than three electrodes. It includes the case of using.
- the concentration of the fiber-forming polymer in the solution in the production method of the present invention is preferably 1 to 50% by weight. If the concentration of the fiber-forming polymer is less than 1% by weight, the concentration is too low and it is difficult to form a fiber structure, which is not preferable. On the other hand, if it is more than 50% by weight, the viscosity of the solution increases, so that it is necessary to apply a higher voltage between the electrodes, which is not preferable. A more preferred concentration of the fiber-forming polymer is 2 to 30% by weight.
- the volatile solvent that forms a solution in the present invention is a substance that dissolves the aliphatic polyester, has a boiling point at normal pressure of 200 ° C or lower, and is liquid at normal temperature (for example, 27 ° C).
- Specific volatile solvents include, for example, methylene chloride, chloroform, dichloroethane, tetrachloroethane, trichloroethane, dibromomethane, bromoform, acetone, methanol, ethanol, propanol, isopropanol, toluene, tetrahydrofuran, 1 , 1,1,3,3,3-hexafluoroisopropanol, 1,4-dioxane, carbon tetrachloride, cyclohexane, cyclohexanone, acetonidyl and the like.
- methylene chloride chloroform, dichloroethane, tetrachloroethane, trichloroethane, dibromomethane, bromoform, tetrahydrochloride, because fibers having the above surface structure can be easily formed. Mouth furan and 1,4-dioxane are preferred, and methylene chloride is particularly preferred.
- volatile solvents may be used alone or a plurality of volatile solvents may be combined. Further, in the present invention, other nonvolatile solvents may be used in combination as long as the object is not impaired.
- any method can be used to discharge the solution into an electrostatic field.
- the solution is placed at an appropriate position in the electrostatic field, and the solution is drawn from the nozzle by an electric field to form fibers.
- an appropriate device can be used.
- an injection needle-shaped solution ejected by applying a voltage to the tip of the cylindrical solution holding tank 3 of the syringe by an appropriate means, for example, the high voltage generator 6. Install nozzle 1 and guide the solution to its tip.
- the tip of the jet nozzle 1 is arranged at an appropriate distance from the grounded fibrous substance collecting electrode 5, and when the solution 2 exits the tip of the jet nozzle 1, the tip of the jet nozzle 1 and the fibrous substance collecting electrode 5 are separated. To form a fibrous substance.
- the production rate of the fibrous substance can be increased by using several nozzles.
- the distance between the electrodes depends on the charge amount, the nozzle size, the spinning solution flow rate, the spinning solution concentration, etc., but when it is about 10 kV, a distance of 5 to 20 cm was appropriate.
- the applied electrostatic potential is generally 3 to 100 kV, preferably 5 to 50 kV, and more preferably 5 to 30 kV.
- the desired potential may be created by any appropriate method.
- the above description is for the case where the electrode also serves as the collecting substrate.However, by installing a potential collecting substrate between the electrodes, a collecting substrate is provided separately from the electrode, and the fiber structure is collected there. You can do this. In this case, for example, a belt-like substance is placed between the electrodes, and this is used as a collecting substrate. By doing so, continuous production is also possible.
- the fiber having the above surface structure can be easily obtained, which is preferable. More preferable relative humidity is 25 to 95% or more.
- the solvent evaporates according to the conditions to form a fibrous substance.
- the solvent evaporates completely before being collected on the collecting substrate, but if the solvent evaporation is insufficient, the spinning may be performed under ⁇ J pressure conditions.
- the spinning temperature depends on the evaporation behavior of the solvent and the viscosity of the spinning solution, but is usually 0 to 50 ° C.
- the anti-adhesion film of the present invention can be used as long as its characteristics are not impaired, as long as it does not impair its characteristics. Combination of agents such as substances can promote tissue repair.
- the fibrous structure is made of a biodegradable and absorbable polymer, the above-mentioned drug can be contained in the fiber to provide a sustained release function.
- the obtained fiber structure was cut into a circular shape having a diameter of 24 mm, immersed in a 70% ethanol aqueous solution for sterilization, air-dried, and then set on a cell culture insert (BD Biosciences).
- the film was seeded with mouse embryonic fibroblasts at 2 x 105 cells / ml / well without immersion in the medium, and 3 ml of the medium was placed in a well plate for 2 days at 5% C02 and 37 ° C in an incubator (H eraeus).
- FIG. 5 shows a scanning electron micrograph after cell adhesion.
- Fig. 8 shows a scanning electron micrograph after cell adhesion.
- the present invention can provide an anti-adhesion film having an extremely high anti-adhesion effect, and a method for producing the same, by having a fiber structure made of fibers having a unique surface structure.
Landscapes
- Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Surgery (AREA)
- Vascular Medicine (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Materials For Medical Uses (AREA)
- Artificial Filaments (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005505287A JP4384116B2 (ja) | 2003-04-07 | 2004-04-06 | 癒着防止膜およびその製造方法 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003102565 | 2003-04-07 | ||
| JP2003-102565 | 2003-04-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004089433A1 true WO2004089433A1 (ja) | 2004-10-21 |
Family
ID=33156802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2004/004947 Ceased WO2004089433A1 (ja) | 2003-04-07 | 2004-04-06 | 癒着防止膜およびその製造方法 |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4384116B2 (ja) |
| TW (1) | TW200423976A (ja) |
| WO (1) | WO2004089433A1 (ja) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008543922A (ja) * | 2005-06-21 | 2008-12-04 | テュルジ,アントワヌ | 生体吸収性ヒドロゲル |
| JP2009506861A (ja) * | 2005-09-05 | 2009-02-19 | バイオレーン カンパニー リミテッド | 多層構造の癒着防止剤 |
| US9192624B2 (en) | 2010-12-06 | 2015-11-24 | Ajinomoto Co., Inc. | Medical material and method for manufacturing same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020173213A1 (en) * | 2001-05-16 | 2002-11-21 | Benjamin Chu | Biodegradable and/or bioabsorbable fibrous articles and methods for using the articles for medical applications |
-
2004
- 2004-04-06 WO PCT/JP2004/004947 patent/WO2004089433A1/ja not_active Ceased
- 2004-04-06 JP JP2005505287A patent/JP4384116B2/ja not_active Expired - Fee Related
- 2004-04-07 TW TW93109604A patent/TW200423976A/zh unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020173213A1 (en) * | 2001-05-16 | 2002-11-21 | Benjamin Chu | Biodegradable and/or bioabsorbable fibrous articles and methods for using the articles for medical applications |
Non-Patent Citations (4)
| Title |
|---|
| BOLAND E.D. ET AL: "Electrospinning of Tissue Engineering Scaffolds", POLYMERIC MATERIALS: SCIENCE & ENGINEERING, vol. 85, 2001, pages 51 - 52, XP002979903 * |
| BOLAND E.D. ET AL: "Tailoring tissue engineering scaffolds using electrostatic processing techniques: a study of poly(glycolic acid) electrospinning", J. MACROMOL. SCI. PURE APPL. CHEM., vol. A38, no. 12, 2001, pages 1231 - 1243, XP002979904 * |
| EL-REFAIE KENAWY ET AL: "Release of tetracycline hydrochloride from electrospun poly(ethylene-co-vinylacetate), poly(lactic acid), and a blend", JOURNAL OF CONTROLLED RELEASE, vol. 81, 2002, pages 57 - 64, XP004351103 * |
| XINHUA ZONG ET AL: "Prevention of post-surgical adhesions using electrospun bioabsorbable non-woven nanofiber membranes.", POLYMER PREPRINTS, vol. 44, no. 2, 2003, pages 89 - 90, XP002979905 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008543922A (ja) * | 2005-06-21 | 2008-12-04 | テュルジ,アントワヌ | 生体吸収性ヒドロゲル |
| JP2009506861A (ja) * | 2005-09-05 | 2009-02-19 | バイオレーン カンパニー リミテッド | 多層構造の癒着防止剤 |
| US9192624B2 (en) | 2010-12-06 | 2015-11-24 | Ajinomoto Co., Inc. | Medical material and method for manufacturing same |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200423976A (en) | 2004-11-16 |
| JPWO2004089433A1 (ja) | 2006-07-06 |
| JP4384116B2 (ja) | 2009-12-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4598671B2 (ja) | 支持基材と複合体の製造方法 | |
| JP4496360B2 (ja) | 医療用高分子ナノ・マイクロファイバー | |
| EP2968669B1 (en) | Ultrafine electrospun fibers of poly-4-hydroxybutyrate and copolymers thereof | |
| US20100143435A1 (en) | Scaffold with increased pore size | |
| US12201749B2 (en) | Combined macro and micro-porous hybrid-scale fiber matrix | |
| CN101060817B (zh) | 圆筒体的制造方法 | |
| JP4354996B2 (ja) | リン脂質を含有する繊維構造体 | |
| CHEN et al. | Optimization of electrospinning process parameters for tissue engineering scaffolds | |
| JP4417909B2 (ja) | エラスチン成形体およびその製造法 | |
| JP4383763B2 (ja) | 細胞培養基材およびその製造方法 | |
| WO2004089433A1 (ja) | 癒着防止膜およびその製造方法 | |
| JP5646820B2 (ja) | 創傷治療材料 | |
| JP5010854B2 (ja) | 血管再生材料 | |
| JP4729293B2 (ja) | 人工心臓弁、再生医療用基材及びその製造方法 | |
| US12233634B2 (en) | Porous body and material for medical use | |
| JP5589080B2 (ja) | フィブリン糊と繊維成形体との複合体 | |
| Nam | Electrospun polycaprolactone scaffolds under strain and their application in cartilage tissue engineering | |
| Shanmugasundaram et al. | The contribution of electrospinning to tissue engineering and related fields |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
| AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
| DPEN | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed from 20040101) | ||
| WWE | Wipo information: entry into national phase |
Ref document number: 2005505287 Country of ref document: JP |
|
| 122 | Ep: pct application non-entry in european phase |