149 results about "SURGICAL DRESSINGS" patented technology

A wound or surgical dressing is disclosed. The wound or surgical dressing is configured to cover or surround a wound, a surgical incision, or any type of skin irritation. In accordance with the present disclosure, the wound or surgical dressing is treated with a bacteriostatic composition that is capable of binding and trapping negatively charged matter, such as bacteria, pathogens, and the like. The bacteriostatic composition comprises a cationic polymer, a cationic oligomer, or particles coated with a cationic material. The bacteriostatic composition is bonded to the wound or surgical dressing in a manner such that the bacteriostatic composition is not substantially transferred to a patient being treated.

Disclosed are water-dispersible fibers derived from sulfopolyesters having a Tg of at least 25° C. The fibers may contain a single sulfopolyester or a blend of a sulfopolyester with a water-dispersible or water-nondispersible polymer. Also disclosed are multicomponent fibers comprising a water dispersible sulfopolyester having a Tg of at least 57° C. and a water non-dispersible polymer. The multicomponent fibers may be used to produce microdenier fibers. Fibrous articles may be produced from the water-dispersible fibers, multicomponent fibers, and microdenier fibers. The fibrous articles include water-dispersible and microdenier nonwoven webs, fabrics, and multilayered articles such as wipes, gauze, tissue, diapers, panty liners, sanitary napkins, bandages, and surgical dressings. Also disclosed is a process for water-dispersible fibers, nonwoven fabrics, and microdenier webs. The fibers and fibrous articles have further applications in flushable personal care and cleaning products, disposable protective outerwear, and laminating binders.

The invention provides a nano-silver antibacterial fabric and a preparation method thereof. The nano-silver antibacterial fabric has the characteristics that a zinc oxide nano line grows on the fabric; and silver nano particles are deposited on the zinc oxide nano line. The zinc oxide nano line is synthesized by a solution chemical method; and the silver nano particles are deposited on the zinc oxide nano line by a simple 'immersion-illumination' method. The nano-silver antibacterial fabric prepared by the method has extremely obvious long-time antibacterial performance; the silver nano particles are small in size and cannot be accumulated; a synthesis process is environment-friendly; and the nano-silver antibacterial fabric can be recycled and reused. The nano-silver antibacterial fabric can be used for single-point water treatment to reduce microorganism content in water and can be suitable for medical surgical dressing and medical fabrics; and the nano-silver antibacterial fabric can be used as an antibacterial air filtration device for preventing bio-aerosol from being gathered on a ventilating, heating and air conditioning system.

An antibacterial medical dressing for the operation wound is prepared from chitosan fibers through alkalizing to become alkaline chitosan fibers, and etherifying reaction on chloroacetic acid to become carboxymethyl chitosan fibers. When said fibers are encountered with water, it is swelling to become elastic gel. It is possible to add additive for higher curative effect.

The invention provides a rapid-imbibing foamed material with antibacterial property and a preparation method thereof. The material is a porous foamed material with antibacterial property prepared by using polyvinyl alcohol and chitosan as raw materials, formaldehyde as cross linking, and sulfuric acid, surface active agent and water as auxiliary materials; the material has good air permeability, the water absorption rate is more than 1000%, the time with water absorption height being 50mm is less than 150sec, and after imbibing, the material become soft, resilient and flexible sponge. The material has excellent characteristics of bacteria inhabiting, the percentage of reduced bacteria is more than 40% in experimental conditions, resists heat and ultraviolet rays, can be sterilized by a plurality of ways. The material not only can be used as surgical dressing, but also can be used as hemostatic materials, filling materials and the like for surgery. As the material has the advantages of no fiber loss and high imbibing speed, the material has uniqueness in the applications of surgeries in ophthalmology, ear-nose-throat department and other microsurgeries.

The invention relates to a method for preparing a multi-layer composite functional surgical dressing. The method comprises the following steps: respectively and independently carding the fiber layers comprising a functional layer which is formed by mixing chitosan fiber or chitosan fiber and viscose and is directly contacted with the skin, a water-absorbing layer which is made of viscose and has high liquid absorption performance and a protective layer which is formed by mixing the viscose and polyester fiber and has the supporting and protecting functions so as to form a net, manufacturing a three-layer laminate with an upper functional layer, a middle water-absorbing layer and a lower protective layer by employing a water jet strengthening technology, coating a waterproof agent on the protective layer of the three-layer laminate to form a waterproof layer, and finally rolling to obtain the surgical dressing. The product has high biocompatibility and promotes healing, the antibacterial rate is up to 96.7 percent, the liquid absorption rate is 1259 percent, the waterproofing grade is up to level 5, and the surgical dressing can be used for clinical repair for operative incision, burn, scald, ulcer and other skin injury and is simple in production process, low in cost and environmentally-friendly.

The invention provides a preparation method of a chitosan-based drug-loading composite antibacterial superfine fiber membrane. The preparation method comprises the following steps: S1, adding antibacterial medicine powder into an acetic acid aqueous liquid with mass fraction of 2-90%, stirring by a magnetic stirrer to fully dissolve, weighing chitosan and polyoxyethylene powder into the liquid, and stirring to obtain a spinning liquid; and S2, adding the spinning liquid into an unfolder for electrostatic spinning, putting the obtained electrostatic spinning membrane in a drier holding a 25% glutaraldehyde aqueous liquid for crosslinking for 12-36 hours, drying, and finally obtaining the chitosan-based drug-loading composite antibacterial superfine fiber membrane, wherein the diameter of the fiber is 150-600nm. The electrostatic spinning superfine fiber prepared by the invention has the characteristics of good adhesion, flexibility, good antibacterial performance, hemostasis, percolate absorption, healing and the like. By designing the compounding proportion of chitosan and antibacterial drug, the membrane can satisfy different anti-infection demands, wound nursing of different types and surgical dressing field.

The invention relates to a preparing method of a polyurethane-keratin composite nano fiber film. The preparing method comprises the steps that polyurethane is dissolved in a solvent, dissolution by stirring is carried out, and a polyurethane solution is obtained; keratin is dissolved in a solvent, dissolution by stirring is carried out, and a keratin solution is obtained; and the polyurethane solution and the keratin solution are mixed according to the weight ratio of 95 : 5-5 : 95, blending by stirring is carried out, a polyurethane-keratin spinning solution is obtained, then electrostatic spinning is carried out, nano filaments are received by aluminum foil or cloth, and the polyurethane-keratin composite nano fiber film is obtained. According to the polyurethane-keratin composite nano fiber film, the good biological activity of the keratin is maintained, the good tenacity and the good mechanical strength of the polyurethane are achieved, and the polyurethane-keratin composite nano fiber film is expected to be used in fields such as surgical dressing.

The invention discloses a method for preparing a chitosan-based antibacterial membrane material. The method comprises the following steps of: dissolving chitosan into a diluted acid solution with a certain concentration; adding a polyvinylpyrrolidone iodine solution to agitate at a room temperature to react for more than 2.5 hours; after centrifuging and separating an agitated solution, taking liquid supernatant to pave a membrane; and drying at 40 DEG C to obtain a chitosan-based antibacterial membrane. The prepared chitosan-based antibacterial membrane material has the antibacterial activity which is more durable and effective, improves the stability of effective iodine and has good iodine slow-releasing performance and mechanical property. The novel antibacterial membrane material disclosed by the invention can be used for medical surgical dressings, the antibacterial membrane material and the like to have a wide application prospect in the fields including foods, medicines, textile industry and the like.

The invention discloses a konjac glucomannan contained filament fiber material and a preparation method thereof, which belong to the technical field of environment-friendly polymer fiber materials. The konjac glucomannan contained filament fiber material comprises, by mass percent, 0.1-75% of starch, 5-80% of konjac fine powder, 1-25% of water, 1-10% of lactic acid, and 0.1-5% of coagulator made up of ethanol, glycerol and ammonia water. The main materials, such as the natural starch, the konjac fine powder and the like, are from rich food-grade natural polymers, and the konjac glucomannan contained filament fiber material is harmless to human bodies and capable of degrading under natural conditions. Process parameters of microwave pretreatment-wet spinning can be adjusted to achieve regulation of degradation rate of the fiber material, and environment friendliness is achieved. The fiber can be widely applied to uses, such as food packaging, gas filtration, biochemical dialysis, disposable garments, breathable fabrics, beauty masks, slow release of perfumes or deodorization using perfumes, antiseptic wipes, baby diapers, feminine napkins, wound bandages, surgical dressings, slow release of drugs, tissue engineering scaffolds and the like.

The invention discloses a medical pad pasting negative pressure drainage device which is applicable to in-vivo or body-surface or large-area wound surface treatment. The medical pad pasting negative pressure drainage device comprises porous wound surface surgical dressing, an external sucking disc and a biological semi-transparent membrane which enables the porous wound surface surgical dressing to be sealed on the wound surface. The external sucking disc comprises a conversion connector, a connecting membrane and an outer drainage tube, the outer drainage tube is arranged on one side of the conversion connector, the bottom of the conversion connector is provided with a tray and a through hole, the through hole is communicated with the outer drainage tube, an opening is formed in the position, corresponding to the through hole, of the biological semi-transparent membrane, the connecting membrane is installed on the conversion connector in a sleeved mode through a sucking disc through hole, and the connecting membrane is pasted with the upper surface of the tray and the biological semi-transparent membrane. The tail end of the outer drainage tube is connected with a drainage container, a catheter and a negative pressure source, a flushing tube is arranged in the outer drainage tube, the tail end of the flushing pipe is extended out from the lateral wall of the tail end of the outer drainage tube, and a sealing cover capable of covering the flushing pipe is arranged at the tail of the flushing pipe. The medical pad pasting negative pressure drainage device is simple in structure and good in sealing performance, and the negative pressure drainage effect of the medical pad pasting negative pressure drainage device is improved.

The invention relates to nano-silver composite collagen surgical dressing and a preparation method of the nano-silver composite collagen surgical dressing. The preparation method comprises the following steps: uniformly mixing a dialdehyde polysaccharide solution and silver nitrate solution, completely boiling the mixed solution, carrying out reflux condensation, after the mixed solution is cooled to the room temperature, carrying out dialysis and centrifugalizing, taking the supernate, thus obtaining nano-silver solution, soaking collagen sponge in the nano-silver solution, and carrying out freeze drying, thus obtaining the nano-silver composite collagen surgical dressing. The stable nano-silver solution with narrow particle size distribution range is prepared by adopting a pollution-free reduction method, in addition, dialdehyde polysaccharide in the solution can have Schiff base chemical crosslinking reaction with collagen, and thus the physical properties of the collagen sponge are enhanced. The prepared nano-silver composite collagen surgical dressing has the advantages of broad-spectrum antibacterial activity, rapid bleeding-stopping property, high mechanical property, good moisture retention and biocompatibility, and has the potential market application prospect in the field of treating burns and scalds.

This invention provides a hydrogel surgical dressing product having a designed multi-dimensional flexible hydrophilic structure-linkage composite, comprising: a hydrogel cushion layer, and a multiple of hydrophilic microsphere, wherein said multi-dimensional flexible hydrophilic structure-linkage composite comprising a hydrophilic multi-dimensional flexible structure-linkage membrane, and a multiple of structure-linkage holes positioned into said hydrophilic multi-dimensional flexible structure-linkage membrane, and the sizes of structure-linkage holes changed with the degree of compelling force, resulting in a multi-dimensional flexible structure-linkage relationship and a consolidating structure.

The invention relates to a method for preparing a chitosan/polyving alcohol/polylactic acid blended dense membrane, comprising the following steps: (1) dissolving chitosan by using acetum as solvent under the temperature of 30-40 DEG C to obtain 3wt% of chitosan solution; (2) dissolving polyving alcohol by using dimethyl sulfoxide solution as solvent at room temperature to obtain 5wt% of polyving alcohol solution; (3) dissolving polylactic acid by using deionized water as solvent under the temperature of 80-120 DEG C, stirring until completely dissolving to obtain 7wt% of polylactic acid solution; (4) mixing the above three solutions according to a certain ratio, stirring for 15-30min at constant temperature of 20-30 DEG C, standing and defoaming; and (5) preparing the blended dense membrane by tape casting. The invention does not relate to toxic substance in the process of preparing the membrane, has the advantages of simple and convenient equipment and technology for preparing the membrane, good biodegradability and convenient clinic application, and is suitable for artificial skin, surgical dressing and the like in the biomedical filed.

Described is a dressing comprising two separate component sections (2,3) and a joint (4) breakably connecting the sections (2,3), the first section being designed for surgical use and the second section being designed to act as a counterfoil of the used section (3) of the dressing (1).

The invention provides a method for preparing blending electrospun fiber membrane by adopting membrane protein contained in avian egg shells, which pertains to the technical field of support materials in tissue engineering. The method is characterized in that one or even more natural or synthetic biodegradable polymers together with soluble membrane protein in egg shells are dissolved in a cosolvent; and electrospun fiber membrane is prepared by elecrospinning process. The method is simple in operation, and the electrospun fiber membrane has good biocompatibility and biodegradability and certain mechanical property. Therefore, the electrospun fiber membrane can be applied to the fields of support materials in tissue engineering, surgical dressings, and the like.

It is a method of preparing functional antibacterial fiber. Its character lies in that CD grafted to cellulose fiber to Form cyclodextrin-cellulose fiber polymer including chloramphenicol serving to be antibacterial. Compared with the existing technology, the invention of the advantages are : a) the CD received cellulose fiber, CD Modified fiber formation, and then use the fiber of cyclodextrin inclusion drugs, achieving CD - cellulose polymer drug screening, controlled drug release, the protection function of drug activity; 2) Antibiotics can be functional fiber weaving, tailoring, made of various kinds of medicinal materials functional textiles, Surgical dressing for antibacterial materials, wartime emergency bandaging materials, and better meet the medical needs of a different.

The invention aims at disclosing a chitin gel band-aid and a preparation method thereof. The band-aid comprises a carrier, wherein the carrier is provided with hydrogel hemostasis surgical dressing, the hydrogel hemostasis surgical dressing comprises the following components by weight percentage: 0.5-5% of chitin, 1.5-5% of sodium polyacrylate, 5-10% of sodium carboxymethylcellulose, 0.5-1% of povidone, 0.5-2% of gelatin, 0.05-0.5% of dihydroxyaluminium aminoacetate, 20-40% of glycerinum, 36-71.9% of purified water, and 0.05-0.5% of glacial acetic acid. Compared with the prior art, the chitin gel band-aid has anti-inflammatory and sterilizing functions due to the combination of the wet environment and the effect of the chitin added into the gel, so that the wound can be healed quickly, the pain of a patient is reduced, and the purpose of the chitin gel band-aid is reached.

The invention provides a degradable diagnosis robot. A main body of the robot is prepared from a non-toxic degradable absorbable biocompatible material, the main body is at least provided with a loading unit and a control unit connected with the loading unit, the loading unit is provided with a surface mesopore and a cavity structure, the loading unit is used for carrying and releasing a drug andis internally provided with a plurality of channels and cavities, the control unit is prepared from a magnetic nanometer material and deforms and vibrates according to the change of the outside magnetic field, so that the loading unit is extruded to release the drug. The diagnosis robot has the advantages of multiple dimensions, nontoxicity, degradability, autonomous drive and accurate targeting,and compared with the oral drugs or the surgical operations, the degradable diagnosis robot is higher in accurate targeting and has small side effects. The degradable diagnosis robot has an extensiveapplication prospect in the fields of novel diagnosis and treatment of clinical diseases, surgical dressings, controlled release of drugs, nanometer robots and the like.

A surgical liquid dressing is a monolayer film prepared by mixing glue liquid comprising the following formulated ingredients: polyvinyl alcohol aqueous solution for 100 shares by wt, acrylic ester emulsion pressure-sensitive adhesive for 4-8 shares by wt, and glycerol for 1 share by wt; another surgical liquid dressing is a bilaminar film prepared by following two layers of solution, the lower layer is polyvinyl alcohol aqueous solution, and the upper layer is polyamide alcoholic solution soluble in alcohol; and another surgical liquid dressing is a multi-laminar film prepared by following three layers of solution: the lower layer is polyvinyl alcohol aqueous solution, the middle layer is polyvinyl acetate solution soluble in alcohol, and the upper layer is polyamides alcoholic solution. A plurality of film forming materials with enough strength, water resistance and bioavailability are produced by multiple composition of one or several polymers and proper additives, and can be coated on body surface of organism, such as human hands, limbs, bellies, and etc, to acting with isolation and protection function for certain time. Said materials can be used in the medical occasion or the personal hygiene protection occasion, such as used as surgical dressing, temporary protective gloves, and etc.

The invention discloses a preparation method of a sodium alginate fiber for surgical dressing, and belongs to the technical field of sodium alginate fiber preparation. The method includes steps of taking fresh kelp as raw materials, immersing the kelp by sodium hydroxide solution after chopping; making the internal fiber of the kelp swell; instantly releasing pressure after heating and preserving pressure, and making the kelp cell tissue break; performing ultrasonic treatment after adjusting pH value by hydrochloric acid; further releasing effective components through cavatition of ultrasound wave; adding calcium chloride to make it settle after ion exchange reaction; after dissolving the sediment by sodium chloride solution, using ethanol as the precipitator; refining the effective components; after filtering and drying, co-mixing and modifying with wheat vital gluten and peach gum at ratio; at last, acquiring the sodium alginate fiber for surgical dressing through spinning, freezing and drying. Through the co-mixing and modification of the high-purity sodium alginate, vital gluten and others, the method improves the flexibility of the sodium alginate fiber, improves the elongation at break, and widens the using scale of the sodium alginate fiber.