Anti-bacterial composition as well as controlled-release anti-bacterial film and implant material prepared from same

An antibacterial composition and antibacterial film technology, applied in the field of slow release antibacterial films and implant materials, can solve the problems of weak binding force, difficulty in controlled release, limited clinical application, etc., and achieve easy fit, high binding force, and controllable release effect

Active Publication Date: 2014-02-19
TRANSEASY MEDICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For broad-spectrum antibiotics, they are generally water-soluble small molecules, which have a weak binding force with hydrophobic polymers, are difficult to increase the embedding amount, and are difficult to control release, which greatly limits clinical application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The present embodiment prepares slow-release antibacterial film according to the following method:

[0042] (1) Preparation of antibacterial composition: Add 0.5mL levofloxacin aqueous solution (50% concentration) into 8mL DMF and acetone mixed solvent (DMF / acetone volume ratio is 1 / 1), add polylactic acid-glycolic acid copolymerization (PLGA, Mw=80,000, LA / GA=75 / 25) 10g and polylactic acid-polyethylene glycol block copolymer (PELA, Mw=20,000, LA / EG=1 / 1) 2g, ultrasound 10 After -20 minutes, it was uniformly dispersed, and stirred at 50° C. for 12 hours.

[0043] (2) Preparation of slow-release antibacterial film: inject the mixed solution (antibacterial composition) into a 5mL syringe, add a No. 5 stainless steel needle, and use a high-voltage power supply with a voltage of 25KV. The flow rate of the solution is 2mL / h, and the receiving distance is 15cm; spinning for 2 hours, coating the implant material to be coated, and finally vacuum-dried the coated implant materia...

Embodiment 2

[0046] The present embodiment prepares slow-release antibacterial film according to the following method:

[0047] (1) Preparation of antibacterial composition: ultrasonically disperse 1 g of vancomycin in 10 mL of hexafluoroisopropanol (HFIP) solution, and add polycaprolactone-glycolic acid copolymer (PGCL, Mw=200,000, CL / GA=75 / 25) 3g and gelatin (Mw=80,000) 0.6g, stirred at 70°C for 2 hours.

[0048] (2) Preparation of slow-release antibacterial film: inject the mixed solution (antibacterial composition) into a 10mL syringe, add a No. 5 stainless steel needle, use a high-voltage power supply with a voltage of 25KV, the solution flow rate is 2mL / h, and the receiving distance is 15cm; spinning for 2 hours, coating the implant material to be coated, and finally vacuum-dried the coated material at room temperature for 24 hours to remove residual solvent, and stored it in a drying oven at 4°C.

[0049] The slow-release antibacterial film prepared according to this embodiment is...

Embodiment 3

[0051] The present embodiment prepares slow-release antibacterial film according to the following method:

[0052] (1) Preparation of antibacterial composition: Add 1mL metronidazole aqueous solution (30% concentration) into 10mL DMF and acetone mixed solvent (DMF / acetone volume ratio is 5 / 1), add polylactic acid (Mw= 100,000) 10g and polyethylene oxide (Mw=50,000) 2g, ultrasonically dispersed for 10-20 minutes, stirred at 50°C for 12 hours.

[0053] (2) Preparation of slow-release antibacterial film: inject the mixed solution (antibacterial composition) into a 5mL syringe, add a No. 5 stainless steel needle, use a high-voltage power supply with a voltage of 10KV, the solution flow rate is 5mL / h, and the receiving distance is 15cm; spinning for 2 hours, coating the implant material to be coated, and finally vacuum-dried the coated implant material at room temperature for 24 hours to remove residual solvent, and stored it in a drying oven at 4°C.

[0054] The slow-release anti...

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PUM

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Abstract

The invention discloses an anti-bacterial composition as well as a controlled-release anti-bacterial film and an implant material prepared from the anti-bacterial composition. The anti-bacterial composition comprises first-class macromolecule selected from polylactic acid, polycaprolactone, polylactic acid-hydroxy acetic acid copolymer and polycaprolactone-hydroxy acetic acid copolymer, second-class macromolecule selected from polylactic acid-polyethyleneglycol block copolymer, polycaprolactone-polyethyleneglycol block copolymer, polyethylene oxide, polyvinyl alcohol, gelatin and hyaluronic acid, and an antimicrobial agent. The controlled-release anti-bacterial film prepared from the anti-bacterial composition which is provided by the invention can be adopted to achieve the purpose of releasing the antimicrobial agent in a controllable manner.

Description

technical field [0001] The invention relates to the technical field of antibacterial implant materials, in particular to an antibacterial composition, a slow-release antibacterial film prepared by using the antibacterial composition, and an implant material. Background technique [0002] Surgical infection refers to infectious diseases that require surgical treatment and infections that occur after trauma or surgery. It is the most common in the field of surgery, accounting for about 1 / 3 to 1 / 2 of all surgical diseases. Surgical infection is often divided into specific and non-specific infection, the composition of the pathogenic bacteria is complex, once it occurs, treatment is difficult. Surgical infection is generally caused by pathogenic microorganisms invading the human body, but the resistance of the human body is closely related to the occurrence of infection. Common pyogenic pathogens causing surgical infections include Staphylococcus, Streptococcus, Escherichia col...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/34A61L27/54A61L15/44A61L15/26A61L15/24A61L15/32A61L15/28A61L31/06A61L31/04A61L31/16B05D7/24
Inventor 韩志超许杉杉
Owner TRANSEASY MEDICAL TECH
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