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92 results about "Corneal ulcer" patented technology

Corneal ulcer is an inflammatory or, more seriously, infective condition of the cornea involving disruption of its epithelial layer with involvement of the corneal stroma. It is a common condition in humans particularly in the tropics and the agrarian societies. In developing countries, children afflicted by Vitamin A deficiency are at high risk for corneal ulcer and may become blind in both eyes, which may persist lifelong. In ophthalmology, a corneal ulcer usually refers to having an infectious cause while the term corneal abrasion refers more to physical abrasions.

Method and application for preparing tissue engineering corneal carrier stent by utilizing fresh porcine cornea

The invention discloses a method and application for preparing a tissue engineering corneal carrier stent by utilizing fresh porcine cornea. The method comprises the following steps: cutting a fresh porcine cornea for swelling, repeatedly freeze thawing and breaking cells, removing residual nucleic acid substances through DNA-RNA enzyme treatment, cross-linking, airing, and finally performing irradiation sterilization through ionization rays, thereby obtaining the product. The method is applied to carrier stents of tissue engineering corneal epithelium, stroma, endothelium, front board layer half cornea, rear board layer half cornea and full-layer board layer half cornea, so that the requirement on batch production of tissue engineering corneas is met. The carrier stent serves as a substitute of human corneal stroma to be used for clinical transplant and treatment of un-accumulated whole layer keratohelcosis. The method is applied to large-scale production and clinical popularization and application. The prepared carrier stent has the characteristics of high transparency, dense structure, high mechanical property, high biocompatibility with human corneal seed cells and the like. Therefore, the method is suitable for batch production, so that the requirements on lots of carrier stents for tissue engineering corneas are met.
Owner:青岛彩晖生物科技有限公司

Fresh amnion preservation fluid, fresh amnion preservation method and application thereof

The invention discloses a fresh amnion preservation fluid, a fresh amnion preservation method and application thereof. The fresh amnion preservation fluid is made by adding water for injection to 9.0-12.0g of DMEM culture medium, 10.0-25.0g of chondroitin sulfate, 0.5-1.0g of sodium hyaluronate, 4.0-5.0g of HEPES, 10.0-15.0g of dextran, 1.0-6.0ml of gentamycin, 24.0-30.0mg of dexamethasone, 10.0-15.0ml of non-essential amino acid, 0.50-0.95g of glutathione, 0.0-50.0ml of fetal calf serum to 1000ml. The fresh amnion preservation method comprises the following steps: separating the amnion by a blunt, rinsing the amnion clean, and then processing the amnion by an antibiotic; cutting and packaging the amnion into a container with the amnion preservation fluid; storing the amnion preservation fluid in a refrigerator with the temperature of 4 DEG C, and rinsing hands clean with aseptic phosphate buffer before use. The fresh amnion preservation fluid has the following advantages: 1. the amnion preservation fluid is only stored in the refrigerator with the temperature of 4 DEG C; 2. the shelf life is prolonged to at least 20-30 days; 3. the amnion preservation fluid can be in batch processing and centralized storage, and 4. the amnion preservation fluid can be applied to various amnion transplantation repairs, for example (1) ocular surface reconstruction as a conjunctival substitute, (2) amnion transplantation for treating symblepharon, and (3) treatment of corneal ulcer caused by various reasons and the like.
Owner:天津市医药科学研究所

Method for preparing cornea lamina material

The invention discloses a method for preparing a cornea lamina material. The method comprises the following steps of: carrying out accellular processing on a cornea-sclera complex of a mammal eyeball, culturing an amnion epithelial stem cell, inducing and secreting TSP (Thrombospondin)-1 and co-culturing accellular cornea stroma and the amnion epithelial stem cell, sizing, packaging and sterilizing, and the like. According to an obtained cornea lamina transplanting material, the promotion and the balance among the biocompatibility, the stability, the transparency, the mechanical strength and the bioactivity are realized; the integrity of cornea collagen molecules and a lamina structure can be kept to the largest extent, and compared with that prepared with the traditional method, the accellular cornea stroma prepared according to the method disclosed by the invention is larger in tensile strength and has the moisture content and the transparency close to those of normal cornea; and various cell growth factors and the TSP-1 are gathered, and the cornea lamina material has special effects of inflammatory resistance and vascularization resistance, has the capability of greatly enhancing the bioactivity of the cornea lamina material and can be widely used for repairing complicated ocular surface coloboma such as inflammation and corneal ulcer grown in a vascularization way.
Owner:SHAANXI RUISHENG BIOTECH
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