79results about How to "Keep a humid environment" patented technology

The invention relates to a method for preparing a medical quick liquid-absorbing foam material. The method comprises the steps of well mixing polyvinyl alcohol aqueous solution, aldehyde and a pore-forming agent, adding acid to the mixture, continuing to stir the mixture, pouring the mixed solution into a die, curing and molding the mixed solution, washing and drying the obtained product and obtaining a target object. The material has abundant mutually communicated opening structures through a method of using mechanical foaming together with the pore-forming agent. The prepared material is good in biological compatibility and excellent in hydrophilcity, has the liquid-absorbing capability much higher than common cotton yarn and paper, has the capability of quickly absorbing a large amount of distilled water, physiological saline and urine, turns into soft tenacious elastic sponge after absorbing liquid, is resistant to heat and ultraviolet radiation, and can be disinfected in a plurality of ways. The prepared material is a rigid foam material in a dry state, is a spongy material in a wet state, has the apparent density of between 0.04 and 0.09 g/cm and the liquid-absorbing ratio of between 1,800 and 2,800 percent, and can be applied to medical operations.

The invention discloses a bacteriostatic hydrocolloid dressing and a preparation method thereof. The dressing comprises a polyurethane film, a hydrophilic colloid layer and a peeling layer which are adhered in turn. The preparation method comprises the following steps of: mixing a medical grade rubber substrate, gelatin, mineral oil, an antioxidant, sodium carboxymethyl cellulose, calcium alginate, a tackifier, O-carboxymethyl chitosan and dried nano-silver powder uniformly to obtain a blend; uniformly coating the obtained blend on the polyurethane film to form the hydrophilic colloid layer; covering the peeling layer on the hydrophilic colloid layer; and stamping to obtain the bacteriostatic hydrocolloid dressing. The bacteriostatic hydrocolloid dressing of the invention has high bacteriostasis, and simultaneously has the characteristics of high capacity of absorbing transudate, waterproofness, air permeability, firm adhesion, high compliance, capability of meeting diversified requirements on complicated wound, and simple and easily-implemented preparation method.

A replacement cartridge for a razor assembly is provided that includes a shaving aid body for use with the razor assembly. The shaving aid body includes an aperture disposed within a contact surface. The aperture is sized to receive a razor cartridge. Some embodiments of the present replacement cartridge include a base. In some of those embodiments the base includes one or more features for attaching the replacement cartridge to the razor assembly.

The invention discloses a novel asymmetric wettable electrostatic spinning double-layer film comprising a hydrophobic layer and a hydrophilic layer which are in fit connection. The hydrophobic layer is made of a hydrophobic material, the hydrophilic layer is made of a hydrophilic material, and the hydrophobic material and the hydrophilic layer are made by adopting an electrostatic spinning method.The hydrophobic layer is waterproof and resistant to adhesion and bacteria, so that adverse impact on skin wounds caused by intrusion of foreign substances is prevented; the hydrophilic layer enhances hydrophilicity and water retaining performance of the film, thereby being conductive to absorbing exudates of the wounds, maintaining humid environment of the wounds and promoting quick healing of the wounds. The film is prepared through electrostatic spinning technology, and the hydrophobic layer and the hydrophilic layer are high in controllability in design, so that the film can meet all requirements of ideal wound dressings. The invention further discloses a preparation method of the film.

The preparation method of biological medicinal membrane for curing stomatocace includes the following steps: preparing Chinese medicine suspension, it is made up by using Chinese medicinal materials of borneol, larva of common house-fly and suma gallnut; preparing chitosan colloidal pulp; preparing gelatin colloidal pulp; preparing membrane colloidal pulp; forming medicinal membrane; sterilizing and packaging. Its composition is formed from (by weight portion) 35-45 portions of chitosan colloidal pumlp, 5-15 portions of gelatin colloidal pulp and 20-30 portions of Chinese medicine suspension.

The invention discloses a long-acting sustained-release wound dressing containing levofloxacin sustained-release microspheres. According to the preparation method of the wound dressing, levofloxacin sustained-release microspheres with grain diameter between 10 and 20mu m are fixed in a composite medical non-woven fabric which mainly comprises chitosan fiber, alginate fiber, viscose fiber, and hydrophobic ethylene propylene fiber; and the long-acting sustained-release wound dressing is prepared by taking the levofloxacin sustained-release microspheres as a medicinal component. In a use process, the medicament quickly release levofloxacin after contacting the blood, tissues and surrounding skin of the wound, and can continuously release levofloxacin for a long time, and the effective release of levofloxacin accumulatively reaches 168h. The long-acting sustained-release wound dressing is applied to treatment of bacterium infection of burnt and scalded skin, and the microsphere state medicament can remarkably improve the bioavailability of effective components of the medicament; and the long-acting sustained-release wound dressing has excellent moisture penetrability, hygroscopicity, mechanical tensile property and biocompatibility, the frequency of dressing change can be reduced, and the curative effect and administration safety cam be enhanced.

The invention relates to a povidone iodine hydrogel antibacterial dressing and a preparation method thereof, and belongs to the field of medicines. In view of deficiencies of the prior art, a purposeof the invention is to provide a povidone iodine hydrogel antibacterial dressing prepared from the following raw materials in parts by weight: 0.25 to 1 part of chitosan, 0. 5 to 3 parts of povidone iodine, 0.5 to 2 parts of propylene glycol, 2 to 6 parts of glycerin, 10 to 20 parts of poloxamer, 2 to 4 parts of acetic acid, and 100 to 120 parts of purified water. The antibacterial dressing can not only make the wound in a humid environment, but also relieves the release of a pharmaceutical effect of the povidone iodine, prolongs the duration of the pharmaceutical effect, has a good antibacterial effect, stability, and a wide application range, has a good therapeutic effect on healing of the wound, promotes skin regeneration, and reduces scar formation.

The invention relates to a chitosan quaternary ammonium salt hydrogel antibacterial dressing and a preparation method thereof, and belongs to the field of biomedicine. The chitosan quaternary ammoniumsalt hydrogel antibacterial dressing is prepared from the following raw materials in parts by weight: 0.1-5 parts of a chitosan quaternary ammonium salt, 0.1-5 parts of an organosilicon quaternary ammonium salt, 1-8 parts of a cellulose derivative, 5-20 parts of glycerol and 80-120 parts of purified water. The chitosan quaternary ammonium salt hydrogel antibacterial dressing provided by the invention has a good antibacterial effect, stability and a wide application range, and has a good therapeutic effect on wound healing.

The invention relates to the technical field of medical dressing, and specifically relates to an external medical dressing for first aid of burns and a preparation method thereof. The medical dressing comprises the following raw materials in parts by weight: 40 to 50 parts of chitosan quaternary ammonium salt, 25 to 35 parts of indigo naturalis powder, 8 to 12 parts of humectant, 3 to 7 parts of bletilla striata extract, 3 to 7 parts of garden burnet extract, and 3 to 7 parts of Japanese eupatorium extract. The provided medical dressing can rapidly stop bleeding, relieve pains, protect wounds, and eliminate scars, at the same time, is capable of inhibiting the growth of bacteria, and can be well attached on the wounds. Moreover, the medical dressing can relieve wound pains, control local infection, maintain the moisture of skins of wounds, protect skins, promote wound healing, and prevent scar formation, and is capable of being widely applied to rapid hemostasis, moisture retention, emergency, and treatment of burns and prevention of scar formation.

The invention provides a novel 3D bionic skin dressing and a preparation method thereof. The novel 3D bionic skin dressing comprises a hydrophilic layer fibrous membrane and a hydrophobic layer fibrous membrane which are connected with each other, wherein the hydrophilic layer fibrous membrane is loaded with a bioactive substance, the hydrophobic layer fibrous membrane is loaded with an antibacterial substance, the surface of the hydrophilic layer fibrous membrane and the surface of the hydrophobic layer fibrous membrane are each provided with a bionic hair follicle layer, each bionic hair follicle layer comprises hair follicle holes which are symmetrically arranged, the hair follicle holes penetrate through the hydrophilic layer fiber membrane and the hydrophobic layer fiber membrane, andthe hair follicle holes are filled with hydrogel layers. The novel efficient dressing is provided for the treatment of burn wounds, the theoretical and application development of the 3D bionic skin dressing in promoting burn wound treatment is promoted, a new thought and approach are provided, and important academic values and application prospects are achieved.

A carboxy-containing polyester polyol which is obtained by polymerizing ε-caprolactone by ring-opening polymerization with a compound represented by the formula (1): HOCH₂C(COOH)RCH₂OH (1) (wherein R is C₂ or higher alkyl) and which has a number-average molecular weight of 550 to 950 and is liquid at ordinary temperature. This polyol can give a water-compatible polyurethane resin which is excellent in the preservation of a working atmosphere during handling and application and has excellent drying properties after application, and which has homogeneity and excellent stability and is useful in a wide range of applications such as a binder for coating materials, printing inks, etc. and an adhesive. By the production process, a water-compatible polyurethane resin which is excellent in the preservation of a working atmosphere and drying property and is homogeneous and stable can be easily produced.

The invention provides a liquid trehalose dressing for skin barrier wound repair and a preparation method thereof. The liquid trehalose dressing comprisese 8 to 10 parts of trehalose, 1 to 5 parts ofcompound polysaccharide, 1 to 3 parts of epsilon-polylysine, 0.5 to 1.5 parts of an ethanol extract of bamboo leaf flavonoid, 0.03 to 0.06 part of a lactic acid bacillus/soybean milk fermentation product filtrate, 12 to 15 parts of sodium hyaluronate, 5 to 6 parts of collagen, 1.5 to 2.5 parts of a polyol humectant and 1000 to 1100 parts of water. According to the invention, a more stable and moist microenvironment with good air permeability is provided for wound healing; good antibacterial, anti-inflammatory and anti-oxidation effects and a wound surface nursing function are achieved; pigmentation is reduced; stimulation effect on the skin of a wound surface is reduced; the ability of the skin in adapting to the environment is improved; wound surface healing time is shortened; and the dressing can be widely applied to auxiliary repair of wound surfaces produced in laser and tartaric acid skin replacement, microcrystal grinding, hydro lifting and microacupunoture.

The invention discloses a chitosan composite dressing and a preparation method thereof. The composite dressing comprises a chitosan dressing base layer, a medical water absorbing base layer, a waterproof layer and a medical adhesive tape adhesion layer, wherein the waterproof layer covers the medical adhesive tape adhesion layer; the medical water absorbing base layer is positioned between the chitosan dressing base layer and the waterproof layer; air holes are formed in the chitosan dressing base layer; the shapes and the areas of the chitosan dressing base layer, the medical water absorbing base layer and the waterproof layer are the same; anti-adhesion paper covers the chitosan dressing base layer; and the area of the anti-adhesion paper is consistent to that of the medical adhesive tape adhesion layer. The air holes on the chitosan dressing base layer and the medical water absorbing base layer can guarantee high permeability of water and air, and a wound is prevented from turning white and swelling. The medical water absorbing base layer has a water absorbing pad structure with high water absorption capability, tissue exudate penetrates through the air holes and is absorbed by the water absorbing pad, and efficient liquid absorption property is achieved. The waterproof layer can prevent excessive body fluid from permeating onto a medical adhesive tape, a part covered by the dressing can be fixed well, and the dressing cannot drop easily.

The invention provides an adhesive bandage. The adhesive bandage comprises a wound protective cushion and an adhesive backing, wherein the wound protective cushion consists of a nonwoven fabric and a PE partition membrane, and the nonwoven fabric is coated by a medicament and is povidone iodine. The invention also provides a preparation method of the adhesive bandage. With the adoption of the adhesive bandage prepared from the povidone iodine, the cost is controllable, the use and the carrying are convenient, and the adhesive bandage and the povidone iodine can jointly take the functions of antibiosis, hemostasis and wound protection together.

The invention relates to the field of plantation of Chinese herbal medicine, and especially relates to a plantation method for high productivity of dendrobe. The method is characterized in that the method comprises the following steps: 1, selecting a land which is located in a low mountainous area with altitude being from 300 m to 700 m and in the northwest slope or northeast slope of a river valley, and has rocks and stone walls with bryophyte; 2, selecting seedlings which are 1-2 years old, are strong, are strong in root system, have many sprout tillers, have no diseases and insect pests, and are dug up with roots; 3, dividing the seedlings for cultivation: enabling tree skin to be cut into scale openings at 30 cm intervals, enabling the roots to be placed in the scale openings, clamping the roots or bundling the roots through a bamboo skin, coating the roots with waste mud which is formed by the mixing of cow dung with sewer sludge, selecting a big stone with moss, enabling dendrobe seedlings to be placed in slits of the big stone, pressing the roots of the dendrobe seedlings through small stones, and coating the periphery with the waste mud; 4, carrying out watering and weeding; 5, carrying out topdressing; 6, carrying out trimming; 7, carrying out the prevention and cure of diseases and pests; 8, carrying out harvesting.

The invention relates to a drug loaded amnion sheet and a preparation method and applications thereof. Specifically, the drug loaded amnion sheet comprises a dry amnion and following components, which are loaded on the dry amnion and substrate membrane surface of amnion, in parts by weight: 5 to 30 parts of bletilla striata, 10 to 30 parts of calcined gypsum, 3 to 25 parts of frankincense, 3 to 25 parts of myrrh, 10 to 30 parts of rhizoma atractylodis, 0.5 to 5 parts of artificial musk, 1 to 15 parts of borneol, and 2 to 30 parts of safflower. The invention also discloses a preparation method of the drug loaded amnion sheet and an application of the drug loaded amnion sheet in the preparation of a medical material for treating skin ulcer diseases. The rapid release and slow release functions of the drug loaded amnion sheet are combined, and the drug loaded amnion sheet can sustain an effective drug concentration in the local environment of wounds.

The invention provides a medical negative-pressure adsorption dressing and application of the medical negative-pressure adsorption dressing in wound surface healing. The medical negative-pressure adsorption dressing is made of a sheet absorbent material, the sheet absorbent material comprises an absorbent layer of a three-dimensional interworking network structure and a wound surface contact face of a three-dimensional interworking network structure, wherein the wound surface contact face is loaded on at least one side of the absorbent layer, and a plurality of negative-pressure drainage holes penetrating through the thickness portion of the sheet absorbent material and a wound observing hole are formed in the sheet absorbent material. Due to the fact that the medical negative-pressure adsorption dressing is provided with the absorbent layer of the three-dimensional interworking network structure and the negative-pressure drainage holes, thick oozed pus or blood on the wound surface is wholly and rapidly absorbed into the dressing, a wet environment of the wound surface can be kept, cellulose or protein and other solid compositions in the ooze between the wound surface and the dressing are prevented from being left, bacteria and other microorganisms are prevented from breeding on the wound surface, the opportunities of wound surface infection are greatly decreased, the wound surface can directly heal without scabbing, and the wound surface healing time is greatly shortened.