Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Gentle preservative compositions for self-preserving solutions

A composition and preservative technology, applied in detergent compositions, lens cleaning compositions, detergent compounding agents, etc., can solve problems beyond clinical level, eye tissue irritation, etc.

Inactive Publication Date: 2007-01-31
BAUSCH & LOMB INC
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although lens adhesion and concomitant eye tissue irritation with DMDAAC was low, it was found to exceed clinically desirable levels in some users

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation of embodiment 1 test solution

[0029] Sample solutions for testing were prepared according to the recipes listed in Table 1 below.

[0030] Table 1

[0031] Element

weight%

the solution

1

2

3

4

sodium borate

boric acid

EDTA

Polymer JR 30M

pH

Osmolarity (mOsm / Kg)

0.135

1.000

0.05

0.02

7.0-7.4

180-220

0.160

1.400

0.05

0.02

7.11

235

0.160

1.400

0.05

0.01

7.11

230

0.160

1.400

0.05

0.005

7.11

232

[0032] Table 1 - continued

[0033] Element

weight%

the solution

5

6

7

8

sodium borate

boric acid

EDTA

Polymer JR 30M

Polymer JR 400

pH

Osmolarity (mOsm / Kg)

0.160

1.400

0.10

0.02

0

7.03

...

Embodiment 2

[0036] Example 2 ISO / FDA Microbial Preservative Efficacy Testing of Test Solutions with 5 FDA / ISO Challenge Microorganisms

[0037] Using 5 kinds of FDA / ISO challenge microorganisms, namely 3 kinds of bacteria and 2 kinds of fungi, the test solutions prepared according to the above-mentioned Example 1 were subjected to ISO / FDA microbial preservative efficacy tests respectively. Acceptance criteria established for bacteria required at least a 3.0 log reduction in the number of viable bacteria per milliliter recovered at 14 days. After 14 days of re-challenge, the concentration of bacteria should have decreased by at least 3.0 logs by 28 days. Acceptance criteria established for yeast and fungi require that the number of viable yeast and fungi recovered per milliliter remain at or below the initial concentration within ±0.5 logs of experimental error within 14 days. After 28 days, the concentrations of fungi and yeast should remain at or below post-rechallenge within experiment...

Embodiment 3

[0042] The preparation of embodiment 3 preservative system

[0043] Sample solutions for testing were prepared according to the preservative system formulations listed in Table 3 below.

[0044] table 3

[0045] Element

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Compositions are described which are useful in preserving any topically applied solution. Compositions including one or more cationic polysaccharides in solution in an amount effective to preserve contact lenses are also described, as well as methods of making and using such solutions.

Description

technical field [0001] The invention relates to the application of one or more cationic polysaccharides in the preparation of flexible antiseptic systems. More specifically, the present invention relates to the use of compositions comprising one or more cationic polysaccharides to provide flexible preservation of ophthalmic solutions and medical devices. Background technique [0002] Currently, the widely used contact lenses fall into two categories: hard and soft. Rigid or rigid corneal lenses are formed from polymerized acrylate materials such as polymethylmethacrylate (PMMA). Gels, hydrogels, or soft lenses are polymerized from monomers such as 2-hydroxyethyl methacrylate (HEMA), or in the case of extended wear lenses, silicon-containing monomers or macromers Polymerized. Both hard and soft contact lenses are exposed to a broad spectrum of microorganisms during everyday wear and become contaminated relatively quickly. Both hard and soft contact lenses require daily cl...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): A61L12/08C11D3/00A01N43/16A61L12/14C11D3/22C11D3/48
CPCC11D3/0078A01N43/16C11D3/227C11D3/48A61L12/143A61L12/08A61L12/14C11D3/22C11D3/00
Inventor 夏尔宁约瑟夫·C.·萨拉莫内
Owner BAUSCH & LOMB INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com