WO2014168307A1 - 지혈 및 상처치유용 카복시메틸셀룰로오스 폼 및 그의 제조방법 - Google Patents
지혈 및 상처치유용 카복시메틸셀룰로오스 폼 및 그의 제조방법 Download PDFInfo
- Publication number
- WO2014168307A1 WO2014168307A1 PCT/KR2013/010545 KR2013010545W WO2014168307A1 WO 2014168307 A1 WO2014168307 A1 WO 2014168307A1 KR 2013010545 W KR2013010545 W KR 2013010545W WO 2014168307 A1 WO2014168307 A1 WO 2014168307A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- foam
- carboxymethyl cellulose
- solution
- acid
- absorption
- 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
Images
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
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
- A61L15/28—Polysaccharides or their derivatives
-
- 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
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/01—Non-adhesive bandages or dressings
- A61F13/01008—Non-adhesive bandages or dressings characterised by the material
- A61F13/01012—Non-adhesive bandages or dressings characterised by the material being made of natural material, e.g. cellulose-, protein-, collagen-based
-
- 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
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
-
- 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
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15203—Properties of the article, e.g. stiffness or absorbency
-
- 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
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/20—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing organic 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
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/42—Use of materials characterised by their function or physical properties
- A61L15/425—Porous materials, e.g. foams or sponges
-
- 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
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/42—Use of materials characterised by their function or physical properties
- A61L15/44—Medicaments
-
- 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
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/42—Use of materials characterised by their function or physical properties
- A61L15/60—Liquid-swellable gel-forming materials, e.g. super-absorbents
-
- 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
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15203—Properties of the article, e.g. stiffness or absorbency
- A61F2013/15284—Properties of the article, e.g. stiffness or absorbency characterized by quantifiable properties
- A61F2013/15463—Absorbency
-
- 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
- A61L2300/40—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices characterised by a specific therapeutic activity or mode of action
- A61L2300/404—Biocides, antimicrobial agents, antiseptic agents
-
- 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
- A61L2300/40—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices characterised by a specific therapeutic activity or mode of action
- A61L2300/418—Agents promoting blood coagulation, blood-clotting agents, embolising agents
-
- 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
- A61L2400/00—Materials characterised by their function or physical properties
- A61L2400/04—Materials for stopping bleeding
Definitions
- the present invention relates to a superabsorbent poorly water-soluble carboxymethyl cellulose foam having a characteristic of absorbing body fluid or water and expanding the volume upon absorption, and maintaining the shape without gelation.
- Carboxymethyl cellulose means that the hydroxyl group of glucose which comprises cellulose is substituted with the carboxymethyl group, and is called abbreviated-name normally.
- Such carboxymethyl cellulose is used in various fields such as grass, food, cosmetics, pharmaceutical additives and petroleum excavation, and is particularly widely used as a medical material due to its excellent biocompatibility.
- carboxymethyl cellulose foam In order for carboxymethyl cellulose foam to be used for medical purposes, it is important to have superabsorbent properties. In wet dressing, it is important to effectively drain the body fluids generated during wound healing, and the foam used for this purpose must be superabsorbent. In the case of hemostatic dressing, it is important to have a superabsorbent property in order to sufficiently absorb the blood generated.
- the carboxymethyl cellulose foam expands while maintaining the shape during liquid absorption.
- the wound covering absorbs body fluid and expands in volume, thereby reducing the space between the wound covering and the wound surface, and preventing infections such as bacteria from entering the wound surface.
- the volume is easy to insert when the dressing is inserted into the damaged area, and once the dressing is seated on the wound, the volume may be expanded by absorbing body fluid or saline solution to fill the cavity.
- hemostasis can be promoted by compressing blood vessels.
- carboxymethyl cellulose foam in order to use the carboxymethyl cellulose foam as a medical use, in particular, wound dressing or hemostatic agent, it is important to have poorly water-soluble, high absorption, high volume expansion properties.
- carboxymethyl cellulose foam has a problem that the expansion is insignificant as much as 1.5 times, or gelling upon absorption does not maintain the shape.
- Korean Patent No. 10-0588614 and Japanese Patent Application Laid-Open No. 2010-284216 describe an anti-adhesion agent mainly containing carboxymethyl cellulose.
- carboxymethyl cellulose is used as an anti-adhesion agent, and after a certain period of time after insertion into the body, it is decomposed and gelatinized when absorbed, and thus it is not suitable for use as a wound dressing or hemostatic agent.
- Korean Patent Laid-Open Publication No. 2002-0062301 describes a tissue-coated medical material composed of a poorly water-soluble soluble cellulose derivative.
- these materials are not described for liquid absorption performance and volume expansion, and therefore are not suitable for use in dressing and the like.
- the inventors of the present invention while studying a superabsorbent poorly water-soluble cellulose derivative foam having a characteristic that expands upon contact with body fluids or moisture, after preparing the carboxymethyl cellulose foam in a freeze-drying method, the foam when subjected to an appropriate acid treatment and compression step, the foam when subjected to an appropriate acid treatment and compression step.
- the present invention was completed by confirming that the degree of liquid absorption of markedly increased, retained its shape without gelation even when absorbed, and exhibited high volume expansion.
- the present invention has a degree of absorption of more than 20 g / g of physiological saline solution of 0.9% concentration, water soluble carboxymethyl, characterized in that the volume is expanded more than twice the volume after physiological saline absorption before physiological saline absorption.
- the poorly water-soluble carboxymethyl cellulose foam is expanded to a thickness of three times or more, more preferably four times or more, compared to physiological saline after the saline solution before the saline solution.
- the degree of such volume expansion can be adjusted according to the degree of compression in the production method of the present invention to be described below.
- the present invention (1) lyophilizing a solution in which 1% by weight to 2% by weight of carboxymethyl cellulose powder is dissolved to prepare a carboxymethyl cellulose foam, (2) the foam prepared in step (1) It provides a method for producing a poorly water-soluble carboxymethyl cellulose foam comprising the step of immersing in an acidic solution, followed by heating and acid treatment, and (3) compressing the acid-treated foam in step (2) below 60 ° C. .
- the present invention further comprises the step (2-1) between the step (2) and step (3), the step of immersing the acid-treated foam in the carboxymethyl cellulose powder dispersion (2-1) It provides a method for producing a cellulose foam.
- the present inventors lyophilized the carboxymethyl cellulose powder to form a foam, the acid treatment and compression of the foam at an appropriate temperature imparts poor water solubility to the foam, showing a high degree of absorption and volume expansion rate but without gelling the form It confirmed that it keeps.
- the acid treatment temperature should be higher than or equal to room temperature, and it was confirmed that the absorption degree, expansion rate, and pressure absorption degree were optimized by pressing at an appropriate temperature (60 ° C.) or lower.
- the water-soluble CMC powder component treated on the poorly water-soluble foam keeps the shape of the foam and smoothes it due to gelation upon contact with water or body fluids. It was confirmed that the liquid absorption and the pressure absorption were improved without sticking to the wound surface.
- the present invention is based on this finding.
- the degree of absorption is greater than 20 g / g with 0.9% concentration of saline solution, and the volume is increased by two times, preferably three times or more, more preferably, compared to physiological saline solution after physiological saline absorption.
- physiological saline refers to the isotonic solution prepared by adjusting the same concentration in consideration of the body fluid of our body as 0.9% NaCl solution.
- the absorbency of 20 g / g or more was shown with respect to physiological saline at a concentration of 0.9%.
- the poorly water-soluble carboxymethyl cellulose foam of the present invention is expanded to two or more times, preferably three or more times, more preferably four or more times, due to the expansion of the thickness of the physiological saline solution prior to the absorption, bar wound coating and Suitable for use as a hemostatic agent.
- the present invention includes a water solubility 20 g / g or more with respect to 0.9% concentration of saline solution, which includes the following steps, the water-soluble carboxy swelling more than four times the volume after the saline solution before the saline solution
- a method for preparing methylcellulose foam That is, the present invention (1) lyophilizing a solution in which 1 to 2% by weight of carboxymethyl cellulose powder is dissolved to prepare a carboxymethyl cellulose foam, (2) the foam prepared in the step (1) acid solution After immersion in the heating step to give an acid treatment, (3) provides a method for producing a poorly water-soluble carboxymethyl cellulose foam comprising the step of pressing the acid treated foam in step (2) below 60 °C.
- Step (1) is to prepare a carboxymethyl cellulose foam by lyophilizing the solution in which the carboxymethyl cellulose powder is dissolved.
- the solution of step (1) is prepared by dissolving carboxymethylcellulose powder in water. Preferably, it can be prepared by dissolving in distilled water.
- the degree of substitution of the carboxymethyl cellulose powder to be used at the time of dissolution is preferably 0.4 or more. In one embodiment of the present invention, carboxymethyl cellulose powder having a degree of substitution of 0.5 was used.
- the concentration of the carboxymethylcellulose solution of the prepared solution is preferably 1% by weight to 2% by weight. If the concentration of the carboxymethyl cellulose solution is less than 1% by weight, there is a problem that the physical strength of the prepared foam is lowered, and if the concentration exceeds 2% by weight, it is difficult to produce a uniform foam due to an increase in the viscosity of the solution.
- the lyophilization can be carried out using conventional methods known to those skilled in the art.
- after freezing at -10 °C it was vacuum dried.
- Step (2) is a step of immersing the foam prepared in step (1) in an acidic solution and then heating and acidifying, and imparting poor water solubility to the foam through acid treatment.
- the acid solution may be an acid added to the mixed solution of alcohol and water, or an acid may be added to the alcohol alone solution.
- the added acid may be any one or more selected from the group consisting of lactic acid, acetic acid, citric acid, succinic acid, formic acid or hydrochloric acid, but is not limited thereto.
- the alcohol may be one or more selected from the group consisting of ethanol, methanol, isopropanol, and the like, but is not limited thereto.
- the volume ratio of the alcohol is preferably 60% to 100%. More preferably, the volume ratio of the alcohol is 80% to 100%. If the alcohol content is less than 60%, the foaming may occur due to excess water during the acid treatment, and the pores in the foam may be blocked or form deformation may occur.
- the heating temperature is preferably 40 °C to 70 °C. In the case of acid treatment at room temperature, it is important to heat during acid treatment because water solubility is not sufficiently given.
- Step (3) is a step of compressing the acid treated foam in step (2) at 60 ° C. or lower.
- Foams which have been reduced in volume through compression, expand in volume with aspiration when contacted with water or body fluids, and can exhibit effective hemostatic performance when applied to a cavity during surgery.
- Existing products have a slight volume expansion of about 1.5 times, but the foams produced by the present invention exhibit improved performance by expanding at least 2 times, preferably at least 3 times, more preferably at least 4 times the thickness.
- the said compression is made at 60 degrees C or less.
- the crimping temperature is 60 ° C. or more, the degree of absorption, the expansion ratio, and the pressure absorption are drastically reduced.
- the degree of compression as described above it is possible to adjust the volume expansion rate according to the characteristics of the desired product.
- the carboxymethyl cellulose foam is prepared by freeze-drying the solution in which the carboxymethyl cellulose powder is dissolved (step 1), the porous carboxymethyl cellulose foam can be prepared, and the porosity is maintained in the subsequent steps 2 and 3
- the porosity since the pore size is changed only after compression in step 3, the porosity may be maintained, and thus the liquid may have high volume expansion properties upon absorption. Since the porosity is kept intact, the desired volume expansion rate can be easily adjusted to the extent of compression, and can be compressed to 25% of the original thickness to have a volume expansion rate of 4 times.
- the physiological saline When immersed in physiological saline in the poorly water-soluble carboxymethyl cellulose foam prepared as described above, the physiological saline is absorbed in the compressed porosity, it is restored to its original volume, and in this principle can exhibit excellent performance when used as a wound dressing or hemostatic agent.
- the present invention comprises the steps of (1) lyophilizing a solution in which 1% by weight to 2% by weight of carboxymethyl cellulose powder is dissolved to prepare a carboxymethyl cellulose foam, (2) the foam prepared in step (1)
- the method of producing a poorly water-soluble carboxymethyl cellulose foam comprising the step of immersing in an acidic solution, followed by heating and acid treatment, (3) compressing the acid treated foam in step (2) at below 60 ° C.
- It provides a method for producing a poorly water-soluble carboxymethyl cellulose foam, characterized in that it further comprises the step (2-1) of immersing the acid-treated foam in the carboxymethyl cellulose powder dispersion between step (2) and step (3). do.
- the degree of absorption is 20 g / g or more with respect to the 0.9% concentration of physiological saline prepared by the above method, and the volume is 2 times or more, preferably 3 times or more, more preferably, compared to the physiological saline after the saline solution. It is characterized by inflating at least four times.
- the step (2-1) is a step of immersing the acid-treated foam in the carboxymethyl cellulose powder dispersion, the surface properties of the foam is changed through the step. Since the carboxymethyl cellulose of the dispersion is water soluble, the foam treated with the dispersion has gelation on the surface when in contact with water or body fluid, resulting in a smooth surface. This is preferable because the foam and the wound surface do not stick when the foam is applied to the wound surface. Since the gelation of the added water-soluble carboxymethyl cellulose proceeds on the surface while maintaining the overall shape of the poorly water-soluble foam, adhesion to the wound surface can be reduced while maintaining the overall shape during absorption.
- the foam treated with the dispersion improved the degree of absorption and pressure absorption due to the gelation of the added water-soluble carboxymethylcellulose. Therefore, the degree of liquid absorption and the degree of pressure absorption can be adjusted as desired depending on the degree of dispersion treatment.
- the carboxymethylcellulose dispersion is prepared by dispersing the CMC powder in at least one solvent selected from the group consisting of ethanol, methanol and isopropanol.
- the ratio of the solvent and the powder of the dispersion can be appropriately adjusted, but preferably used in a ratio of 1 g of powder to 160 g of the solvent.
- the present invention (1) freeze-drying a solution in which 1% to 2% by weight of carboxymethyl cellulose powder is dissolved to prepare carboxymethyl cellulose foam, (2) acidifying the foam prepared in step (1) Immersing in the solution, followed by heating to acid treatment, (3) compressing the acid treated foam in step (2) below 60 ° C, optionally between steps (2) and (3) It provides a poorly water-soluble carboxy methyl cellulose foam prepared by the production method further comprising the step (2-1) of immersing the acid-treated foam in the carboxymethyl cellulose powder dispersion.
- the poorly water-soluble carboxymethyl cellulose foam of the present invention has a liquid absorptivity of 20 g / g or more.
- the conventional polyurethane foam When immersed in 0.9% saline, the conventional polyurethane foam has a degree of absorption of up to 15 times its own weight while the present invention shows a significantly improved absorption of 20 times or more. Therefore, the foam of the present invention can exhibit excellent performance when used as a wound dressing or hemostatic agent.
- the poorly water-soluble carboxymethyl cellulose foam of the present invention expands by more than four times in volume upon absorption. While the volume expansion of the commercialized foams is about 1.5 times or less, the foams of the present invention have improved the volume expansion rate to at least 2 times, preferably at least 3 times, more preferably at least 4 times through compression under appropriate conditions.
- the antimicrobial agent may be combined with the poorly water-soluble carboxymethyl cellulose foam of the present invention to impart antimicrobial performance.
- the antimicrobial component to be complexed may be any one or more selected from the group consisting of silver, silver compounds, triclosan, biguanide-based, and methylene blue, but is not limited thereto.
- the hemostatic material in the poorly water-soluble carboxymethyl cellulose foam of the present invention, it is possible to enhance the hemostatic function.
- the complex hemostatic substance is collagen, gelatin, thrombin, etc., but is not limited thereto.
- the present invention provides a wound dressing using the poorly water-soluble carboxymethyl cellulose foam.
- the poorly water-soluble carboxymethyl cellulose foam of the present invention is excellent in the degree of liquid absorption, and when used as a wound coating material can be effectively prevented from bacterial infection because of its large volume expansion rate.
- it when applied to the body cavity, it is easy to be introduced into the body because it is compressed and small in volume, and once applied to the body can absorb and expand the body fluid can effectively fill the cavity.
- the present invention provides a hemostatic agent using the poorly water-soluble carboxymethyl cellulose foam. Since the poorly water-soluble carboxymethyl cellulose foam of the present invention has excellent absorbency, when used as a hemostatic agent, it exhibits improved performance compared to conventional hemostatic agents. In addition, due to volume expansion during absorption, blood vessels may be compressed to promote hemostasis.
- the poorly water-soluble carboxymethyl cellulose foam prepared according to the production method of the present invention has a remarkably excellent liquid absorption and a large volume expansion upon absorption, and maintains its shape without gelation. Therefore, when used as a hemostatic agent and wound dressing exhibits a significantly improved performance.
- the carboxymethyl cellulose foam is treated with a CMC powder dispersion, the surface properties can be changed to prevent adhesion with the skin, and the pressure-absorbing degree is increased. Therefore, the degree of liquid absorption can be adjusted to suit the desired purpose.
- FIG. 1 is a photograph of a foam produced according to the production method of the present invention.
- FIG. 3 is a picture of the expanded foam after immersing the foam prepared according to the production method of the present invention in 0.9% physiological saline for 10 minutes.
- CMC powder (degree of substitution 0.5) and distilled water were mixed to prepare a 1.5 wt% CMC solution.
- the viscosity of the prepared solution was 4,315 cps.
- the solution was poured into a mold of a certain size and frozen at ⁇ 10 ° C. for 24 hours.
- the frozen solution was vacuum dried to prepare a foam having a density of 0.02 g / cm 3 .
- the prepared foam was immersed in a mixed solution of 200 g of ethanol and 10 mL of 35% HCl, and then heated to 50 ° C. and stirred for 2 hours. Foam was sufficiently washed in ethanol and dried using a 70 °C vacuum oven. The dried foam was pressed at room temperature to prepare a foam having a thickness of 1 mm.
- a foam having a thickness of 1 mm was prepared in the same manner as in Example 1, except that 200 g of ethanol and 38.5 g of 85% lactic acid were used as the acid treatment solution.
- a foam having a thickness of 1 mm was prepared in the same manner as in Example 2, except that the dried foam was pressed at 40 ° C., not at room temperature.
- a foam having a thickness of 1 mm was prepared in the same manner as in Example 2, except that the dried foam was pressed at 60 ° C., not at room temperature.
- CMC powder (degree of substitution 0.5) and distilled water were mixed to prepare a 1.5 wt% CMC solution.
- the viscosity of the prepared solution was 4,315 cps.
- the solution was poured into a mold of a certain size and frozen at ⁇ 10 ° C. for 24 hours.
- the frozen solution was vacuum dried to prepare a foam having a density of 0.02 g / cm 3 .
- the prepared foam was immersed in a mixed solution of 2.2 g of citric acid dissolved in 160 mL of methanol and 40 mL of distilled water, and then heated to 65 ° C. and stirred for 2 hours. After washing the foam sufficiently in ethanol and dried using a 70 °C vacuum oven.
- the dried foam was pressed at room temperature to prepare a foam having a thickness of 1 mm.
- CMC powder (degree of substitution 0.5) and distilled water were mixed to prepare a 1.5 wt% CMC solution.
- the viscosity of the prepared solution was 4,315 cps.
- the solution was poured into a mold of a certain size and frozen at ⁇ 10 ° C. for 24 hours.
- the frozen solution was vacuum dried to prepare a foam having a density of 0.02 g / cm 3 .
- the prepared foam was immersed in a mixed solution of 200 g of ethanol and 10 mL of 35% HCl, and then heated to 50 ° C. and stirred for 2 hours. After washing the foam sufficiently in ethanol and dried using a 70 °C vacuum oven.
- the dried foam was immersed in a mixed dispersion of 160 g of methanol and 1 g of CMC powder and stirred for 10 minutes.
- the stirred foam was taken out and dried using a 70 ° C. vacuum oven.
- the dried foam was pressed at room temperature to prepare a foam having a thickness of 1 mm.
- a foam having a thickness of 1 mm was prepared in the same manner as in Example 6, except that 200 g of ethanol and 38.5 g of 85% lactic acid were used as the acid treatment solution.
- a foam having a thickness of 1 mm was prepared in the same manner as in Example 7, except that the dried foam was pressed at 40 ° C., not at room temperature.
- a foam having a thickness of 1 mm was prepared in the same manner as in Example 7, except that the dried foam was pressed at 60 ° C., not at room temperature.
- CMC powder (degree of substitution 0.5) and distilled water were mixed to prepare a 1.5 wt% CMC solution.
- the viscosity of the prepared solution was 4,315 cps.
- the solution was poured into a mold of a certain size and frozen at ⁇ 10 ° C. for 24 hours.
- the frozen solution was vacuum dried to prepare a foam having a density of 0.02 g / cm 3 .
- the prepared foam was immersed in a mixed solution of 2.2 g of citric acid dissolved in 160 mL of methanol and 40 mL of distilled water, and then heated to 65 ° C. and stirred for 2 hours. After washing the foam sufficiently in ethanol and dried using a 70 °C vacuum oven.
- the dried foam was immersed in a mixed dispersion of 320 g of methanol and 2 g of CMC powder and stirred for 10 minutes.
- the stirred foam was taken out and dried using a 70 ° C. vacuum oven.
- the dried foam was pressed at room temperature to prepare a foam having a thickness of 1 mm.
- CMC powder (degree of substitution 0.5) and distilled water were mixed to prepare a 1.5 wt% CMC solution.
- the viscosity of the prepared solution was 4,315 cps.
- the solution was poured into a mold of a certain size and frozen at ⁇ 10 ° C. for 24 hours.
- the frozen solution was vacuum dried to prepare a foam having a density of 0.02 g / cm 3 .
- the prepared foam was mixed with 200 g of ethanol, and immersed in a mixed solution having a pH of 2.5 and treated at room temperature for 6 hours. After washing the foam sufficiently in ethanol and dried using a 70 °C vacuum oven.
- the dried foam was pressed at 120 ° C. to prepare a foam having a thickness of 1 mm.
- a foam having a thickness of 1 mm was prepared in the same manner as in Example 2, except that the dried foam was pressed at 80 ° C., not at room temperature.
- a foam having a thickness of 1 mm was prepared in the same manner as in Comparative Example 2 except that the dried foam was pressed at 100 ° C.
- a foam having a thickness of 1 mm was prepared in the same manner as in Comparative Example 2 except that the dried foam was pressed at 120 ° C.
- Example 1 In order to analyze the characteristics according to the acid treatment in the preparation of CMC foam, the foam prepared in Example 1 and Comparative Example 1 was immersed in 0.9% saline for 10 minutes. Before immersion, the image of the CMC foam of Example 1 is shown in FIG. 1, and an electron scanning microscope photograph thereof is shown in FIG.
- Example 1 After immersing the foam prepared in Example 1 and Comparative Example 1 in 0.9% saline for 10 minutes, the morphological changes were observed and the respective images are shown in FIGS. 3 and 4.
- the CMC foam of Example 1 subjected to the acid treatment by heating was confirmed that the swelling after absorbing and retained its form.
- the CMC foam of Comparative Example 1 acid-treated at room temperature did not have morphological stability after gelation progressed after absorption.
- the foams of Examples 2 to 4 pressed at room temperature, 40 °C, 60 °C and Comparative Examples 2 to crimped at 80 °C, 100 °C, 120 °C The thickness expansion ratio and the degree of absorption of the foam of 4 were measured.
- the thickness expansion ratio indicates the ratio of the original thickness and the thickness after inhalation, and the resulting foam was immersed in 0.9% saline for 10 minutes and the thickness was measured as follows.
- Thickness expansion rate (%) (thickness after absorption (mm) / thickness before absorption (mm)) ⁇ 100
- the degree of absorption was measured by measuring the weight of the prepared foam, immersed in 0.9% saline for 10 minutes and then the weight of the absorbed foam was calculated as follows.
- Absorption degree (g / g) (foam weight after absorption (g)-foam weight before absorption (g)) / (foam weight before absorption (g))
- Pressurized liquid absorption was measured by the weight before the absorption of the prepared foam, immersed in 0.9 physiological saline for 10 minutes, the pressure of 40 mmHg was applied to the absorbed foam for 1 minute and the weight of the foam was calculated as follows.
- Pressurized liquid absorption degree (g / g) (foam weight after pressure (g)-foam weight before absorption (g)) / (foam weight before absorption (g))
- Example 1 Example 2
- Example 3 Example 4
- Example 5 Example 6
- Example 7 Example 8
- Example 10 Treatment acid HCl Lactic acid Lactic acid Lactic acid Citric acid HCl Lactic acid Lactic acid Lactic acid Citric acid CMC Powder Treatment ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ Pressure Absorbance (g / g) 14.95 10.77 7.78 8.57 9.42 17.00 16.00 14.00 13.00 13.00 Absorption degree (g / g) 42.05 21.55 23.56 26.57 28.61 35.67 33.27 34.33 35.83 33.03
- Thickness Expansion Rate (%) 1200 1333 2000 1500 942 1200 1571 1111 1667 968
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Epidemiology (AREA)
- Materials Engineering (AREA)
- Hematology (AREA)
- Dispersion Chemistry (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Materials For Medical Uses (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
Abstract
Description
| 산 종류 | 산 처리온도(℃) | CMC 파우더 분산액 침지 여부 | 압착온도(℃) | |
| 실시예 1 | HCl | 50 | × | 상온 |
| 실시예 2 | Lactic acid | 50 | × | 상온 |
| 실시예 3 | Lactic acid | 50 | × | 40 |
| 실시예 4 | Lactic acid | 50 | × | 60 |
| 실시예 5 | Citric acid | 65 | × | 상온 |
| 실시예 6 | HCl | 50 | ○ | 상온 |
| 실시예 7 | Lactic acid | 50 | ○ | 상온 |
| 실시예 8 | Lactic acid | 50 | ○ | 40 |
| 실시예 9 | Lactic acid | 50 | ○ | 60 |
| 실시예 10 | Citric acid | 65 | ○ | 상온 |
| 비교예 1 | HCl | 상온 | × | 120 |
| 비교예 2 | Lactic acid | 50 | × | 80 |
| 비교예 3 | Lactic acid | 50 | × | 100 |
| 비교예 4 | Lactic acid | 50 | × | 120 |
| 실시예 2 | 실시예 3 | 실시예 4 | 비교예 2 | 비교예 3 | 비교예 4 | |
| 압착 온도(℃) | 상온 | 40 | 60 | 80 | 100 | 120 |
| 두께 팽창률 (%) | 1333 | 2000 | 1500 | 1250 | 1000 | 125 |
| 흡액도 (g/g) | 21.55 | 23.56 | 26.57 | 14.91 | 7.82 | 1.40 |
| 실시예 1 | 실시예 2 | 실시예 3 | 실시예 4 | 실시예 5 | 실시예 6 | 실시예 7 | 실시예 8 | 실시예 9 | 실시예 10 | |
| 처리산 | HCl | Lactic acid | Lactic acid | Lactic acid | Citric acid | HCl | Lactic acid | Lactic acid | Lactic acid | Citric acid |
| CMC 파우더 처리 | × | × | × | × | × | ○ | ○ | ○ | ○ | ○ |
| 가압 흡액도 (g/g) | 14.95 | 10.77 | 7.78 | 8.57 | 9.42 | 17.00 | 16.00 | 14.00 | 13.00 | 13.00 |
| 흡액도 (g/g) | 42.05 | 21.55 | 23.56 | 26.57 | 28.61 | 35.67 | 33.27 | 34.33 | 35.83 | 33.03 |
| 두께 팽창률(%) | 1200 | 1333 | 2000 | 1500 | 942 | 1200 | 1571 | 1111 | 1667 | 968 |
Claims (10)
- 0.9% 농도의 생리식염수에 대하여 흡액도가 20 g/g 이상이며, 생리식염수 흡액 후 생리식염수 흡액 전에 비하여 부피가 2배 이상으로 팽창하는 것을 특징으로 하는 흡액시 겔화되지 않는 수난용성 카복시메틸셀룰로오스 폼.
- 제1항에 있어서, 상기 수난용성 카복시메틸셀룰로오스 폼은 생리식염수 흡액 후 생리식염수 흡액 전에 비하여 부피가 3배 이상으로 팽창하는 것을 특징으로 하는, 흡액시 겔화되지 않는 수난용성 카복시메틸셀룰로오스 폼.
- 제1항에 있어서, 상기 수난용성 카복시메틸셀룰로오스 폼은 생리식염수 흡액 후 생리식염수 흡액 전에 비하여 부피가 4배 이상으로 팽창하는 것을 특징으로 하는, 흡액시 겔화되지 않는 수난용성 카복시메틸셀룰로오스 폼.
- (1) 1 중량% 내지 2 중량%의 카복시메틸셀룰로오스 파우더가 용해된 용액을 동결건조하여 카복시메틸셀룰로오스 폼을 제조하는 단계;(2) 상기 단계 (1)에서 제조된 폼을 산성용액에 침지한 후 가열하여 산처리하는 단계; 및(3) 상기 단계 (2)에서 산처리된 폼을 60℃ 이하에서 압착하는 단계를 포함하는 제1항 내지 제3항 중 어느 한 항의 흡액시 겔화되지 않는 수난용성 카복시메틸셀룰로오스폼의 제조방법.
- 제4항에 있어서, 상기 단계 (1)의 카복시메틸셀룰로오스 파우더 용액은 수용액인 것을 특징으로 하는 제조방법.
- 제4항에 있어서, 상기 단계 (2)의 가열온도는 40℃ 내지 70℃인 것을 특징으로 하는 제조방법.
- 제4항에 있어서, 상기 산성용액은 알콜과 물의 혼합용액 또는 알콜용액에 산이 첨가된 것으로, 산은 젖산, 아세트산, 구연산, 호박산, 개미산 또는 염산으로 이루어진 군에서 선택되는 어느 하나 이상인 것을 특징으로 하는 제조방법.
- 제7항에 있어서, 상기 알콜과 물의 혼합용액은 알콜의 부피비율이 60% 내지 100%인 것을 특징으로 하는 제조방법.
- 제4항에 있어서, 상기 단계 (2) 및 단계 (3) 사이에,산처리된 폼을 카복시메틸셀룰로오스 파우더 분산액에 침지하는 단계(2-1)를 추가로 포함하는 것을 특징으로 하는 수난용성 카복시메틸셀룰로오스폼의 제조방법.
- 제9항에 있어서, 상기 카복시메틸셀룰로오스 파우더 분산액은 에탄올, 메탄올및 이소프로판올로 이루어진 군으로부터 선택되는 어느 하나 이상의 용액인 것을 특징으로 하는 제조방법.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/782,843 US9642929B2 (en) | 2013-04-08 | 2013-11-20 | Carboxylmethyl cellulose foam for hemostasis and wound treatment, and method for preparing same |
| DE112013006917.2T DE112013006917T5 (de) | 2013-04-08 | 2013-11-20 | Carboxymethylcelluloseschaum zur hämostatischen Behandlung und zur Wundbehandlung und Verfahren zur Herstellung desselben |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020130038336A KR101318421B1 (ko) | 2013-04-08 | 2013-04-08 | 지혈 및 상처치유용 카복시메틸셀룰로오스 폼 및 그의 제조방법 |
| KR10-2013-0038336 | 2013-04-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014168307A1 true WO2014168307A1 (ko) | 2014-10-16 |
Family
ID=49638527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2013/010545 Ceased WO2014168307A1 (ko) | 2013-04-08 | 2013-11-20 | 지혈 및 상처치유용 카복시메틸셀룰로오스 폼 및 그의 제조방법 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US9642929B2 (ko) |
| KR (1) | KR101318421B1 (ko) |
| DE (1) | DE112013006917T5 (ko) |
| WO (1) | WO2014168307A1 (ko) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220249733A1 (en) * | 2018-11-19 | 2022-08-11 | T.J.Smith And Nephew,Limited | Method of immobilising a protein on a substrate |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101745635B1 (ko) * | 2014-12-19 | 2017-06-09 | 한국생산기술연구원 | 섬유 복합 다공성 구조체 및 그의 제조 방법 |
| KR101693696B1 (ko) | 2015-06-12 | 2017-01-06 | 한국생산기술연구원 | 지혈용 다공성 구조체 및 그의 제조 방법 |
| KR101747963B1 (ko) * | 2015-12-29 | 2017-06-27 | 주식회사 라파스 | 미세구조체 패치의 미세구조체 분리방법 |
| KR102656226B1 (ko) * | 2016-12-09 | 2024-04-09 | 한국생산기술연구원 | 칼슘 카르복시메틸 셀룰로오스 파우더 및 수용성 키토산 화합물 파우더를 포함하는 지혈 소재 및 그의 제조 방법 |
| US10953128B2 (en) | 2017-11-02 | 2021-03-23 | St. Teresa Medical, Inc. | Fibrin sealant products |
| KR20190098881A (ko) | 2018-02-14 | 2019-08-23 | 조석형 | 폴리우레탄 폼과 하이드로화이버가 복합화돤 쉬트의 제조방법, 이로부터 제조된 창상 피복제 |
| KR102117643B1 (ko) | 2018-07-26 | 2020-06-03 | 주식회사 바이오팜메드 | 표면 키토산화 키틴 나노화이버 제조방법, 이로부터 제조된 표면 키토산화 키틴 나노화이버, 이를 이용한 키틴/콜라겐 나노화이버 원단 및 그 원단을 이용한 창상피복재 |
| KR20210000009A (ko) | 2019-06-24 | 2021-01-04 | 조석형 | 항균성과 가교특성을 동시에 부여하는 수용성 하이드로화이버 부직포 제조방법, 이로부터 제조된 수용성 하이드로화이버 부직포를 이용한 운드드레싱 |
| KR102459780B1 (ko) | 2020-06-30 | 2022-10-28 | (주)메디코어 | 비강용 스펀지형 창상피복재 및 그 제조방법 |
| KR102416012B1 (ko) * | 2020-09-01 | 2022-07-05 | 정인선 | 지혈 및 분해 속도 조절형 의료용 소재의 제조방법 및 이에 따라 제조된 의료용 소재 |
| KR102475935B1 (ko) * | 2022-03-11 | 2022-12-08 | 구태훈 | 콜라겐과 카르복시메틸 셀룰로오스계 화합물 및 트롬빈을 포함하는 흡수성 지혈 패드, 및 그 제조방법 |
| CN115581798B (zh) * | 2022-11-01 | 2023-06-23 | 珠海市雅莎医疗器械有限公司 | 一种改善肤色暗沉的液体伤口敷料及其制备方法 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4200737A (en) * | 1978-05-17 | 1980-04-29 | International Playtex, Inc. | Preparation of water-insoluble carboxymethyl cellulose absorbents |
| KR20020062301A (ko) * | 1999-11-09 | 2002-07-25 | 덴끼 가가꾸 고교 가부시키가이샤 | 수난용성화된 가용성 셀룰로오스 유도체의 용도 및 그제조방법 |
| KR20030055102A (ko) * | 2001-12-26 | 2003-07-02 | (주)아미티에 | 유착방지제 |
| JP2008013510A (ja) * | 2006-07-07 | 2008-01-24 | Seikagaku Kogyo Co Ltd | 水難溶性組成物並びにその製造方法及び用途 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100470590B1 (ko) | 2002-10-12 | 2005-03-08 | 삼성전기주식회사 | 병진 가속에 의한 신호 검출을 방지하기 위한 마이크로자이로스코프 |
| JP2010284216A (ja) | 2009-06-09 | 2010-12-24 | Hogi Medical:Kk | カルボキシメチルセルロース構造体及びその製造方法 |
-
2013
- 2013-04-08 KR KR1020130038336A patent/KR101318421B1/ko active Active
- 2013-11-20 US US14/782,843 patent/US9642929B2/en not_active Expired - Fee Related
- 2013-11-20 DE DE112013006917.2T patent/DE112013006917T5/de not_active Withdrawn
- 2013-11-20 WO PCT/KR2013/010545 patent/WO2014168307A1/ko not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4200737A (en) * | 1978-05-17 | 1980-04-29 | International Playtex, Inc. | Preparation of water-insoluble carboxymethyl cellulose absorbents |
| KR20020062301A (ko) * | 1999-11-09 | 2002-07-25 | 덴끼 가가꾸 고교 가부시키가이샤 | 수난용성화된 가용성 셀룰로오스 유도체의 용도 및 그제조방법 |
| KR20030055102A (ko) * | 2001-12-26 | 2003-07-02 | (주)아미티에 | 유착방지제 |
| JP2008013510A (ja) * | 2006-07-07 | 2008-01-24 | Seikagaku Kogyo Co Ltd | 水難溶性組成物並びにその製造方法及び用途 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220249733A1 (en) * | 2018-11-19 | 2022-08-11 | T.J.Smith And Nephew,Limited | Method of immobilising a protein on a substrate |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101318421B1 (ko) | 2013-10-16 |
| DE112013006917T5 (de) | 2015-12-24 |
| US20160067370A1 (en) | 2016-03-10 |
| US9642929B2 (en) | 2017-05-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2014168307A1 (ko) | 지혈 및 상처치유용 카복시메틸셀룰로오스 폼 및 그의 제조방법 | |
| WO2016010330A1 (ko) | 고분자 폼 조성물, 이를 이용한 고분자 폼의 제조방법 및 팩킹용 고분자 폼 | |
| WO2017196051A1 (ko) | 다공성의 생분해성 미세입자 및 수용성 천연고분자를 포함하는 성형 필러용 주사제 조성물 | |
| DE4119140C2 (de) | Poröser, in Körperflüssigkeiten und Sekreten löslicher, spongoider Formkörper, dessen Herstellung und Verwendung | |
| WO2022019467A1 (ko) | 국소 지혈 파우더 조성물 및 이의 제조방법 | |
| WO2022265368A1 (ko) | 점막 부착성과 팽윤성이 우수한 필름 형태의 유착방지용 조성물 | |
| CN107320762B (zh) | 胶原/细菌纤维素复合膜敷料及其制备方法 | |
| CN101249275A (zh) | 一种可隔离海水的创面敷料及其制备方法 | |
| WO2024136035A1 (ko) | 세마글루타이드를 포함하는 마이크로니들 및 이의 제조방법 | |
| WO2019203556A1 (ko) | 키토산 섬유성 스폰지 구조의 의료용 드레싱재 및 그 제조 방법 | |
| WO2019088331A1 (ko) | 콜라겐을 이용하여 제조된 의료용 재료 및 그 제조방법 | |
| WO2016200218A1 (ko) | 다공성 구조체 및 그의 제조 방법 | |
| WO2019156463A1 (ko) | 점착성이 우수한 유착 방지 필름 | |
| WO2018097425A1 (ko) | 다공성 하이드로겔 시트의 제조방법 및 그 제조방법에 의해 제조된 다공성 하이드로겔 시트 | |
| WO2022177205A1 (ko) | 경피 약물 전달을 위한 마이크로니들 패치 시스템 | |
| WO2014017756A1 (ko) | 경질 캡슐 제조용 수성 조성물, 그의 제조방법, 경질 캡슐 및 경질 캡슐 스크랩의 재활용 방법 | |
| WO2023282658A1 (ko) | 다중 가교된 온도감응성 하이드로겔 제조용 조성물 및 이의 용도 | |
| WO2021060934A1 (ko) | 고분자 마이크로 입자의 제조방법, 고분자 마이크로 입자, 이를 포함하는 의료용 조성물, 미용 조성물, 의료 용품 및 미용 용품 | |
| WO2025063665A1 (ko) | 초임계 이산화탄소 공정 기반 생체 적합성이 증진된 탈세포 기질 제조 방법 | |
| WO2022092585A1 (ko) | 생체적합성 필름 및 이의 제조방법 | |
| WO2022196946A1 (ko) | 생체적합성 고분자를 포함하는 파우더형 유착방지제 및 그의 제조방법 | |
| CN112618782A (zh) | 生物可分解的止血海绵 | |
| EP3148599B1 (en) | Method for preparing neutralized matrix of non-antigenic collagenous material | |
| WO2022119289A1 (ko) | 팽창성 창상피복재 및 이의 제조방법 | |
| WO2014088178A1 (ko) | 두께 균일성이 개선된 경질 캡슐 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13881587 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 14782843 Country of ref document: US |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 1120130069172 Country of ref document: DE Ref document number: 112013006917 Country of ref document: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 13881587 Country of ref document: EP Kind code of ref document: A1 |