74results about How to "Avoid secondary trauma" patented technology

The invention discloses postoperation anti-adhesion hydrogel and a preparing method thereof. The hydrogel is prepared from sodium alginate powder, chitosan powder, acrylamide monomers, N,N'-methylene bisacrylamide, calcium sulfate, ammonium persulfate and N,N,N',N'-tetramethylethylenediamine. The preparing method of the high-strength high-tenacity chitosan and sodium alginate compound hydrogel is easy to operate, parameters are controllable, the materials are easy to obtain, and the solvent is nontoxic or low in toxicity and safe to treat and use; the method integrates advantages of the two natural biological materials, and the requirement for postoperation adhesion prevention of patients and the requirement for nursing care and treatment of medical workers can be met well. The hydrogel is soft, can be attached to the skin easily, has good flexibility and can effectively prevent wound surface adhesion and be degraded and absorbed, secondary trauma is avoided, and the hydrogel is expected to become a novel postoperation anti-adhesion material.

The invention provides an antibacterial wound dressing and a preparation method thereof. The antibacterial compound type wound dressing is characterized by comprising a chitosan-based medicine carrying compound antibacterial ultrafine fibrous membrane, a calcium alginate fiber non-woven fabric and a supporting protective layer which are sequentially arranged from top to bottom. The medicine carrying ultrafine fibrous membrane obtained by adopting an electrostatic spinning method has the advantages that the surface area of a medicament can be effectively increased, medicines can be slowly and sustainably released by virtue of high porosity and uniform pore diameter of ultrafine fibers, so that the medicines can be fully absorbed by a human body, medication is not need to be carried out frequently, the effect of the medicines can be maintained, and toxic and side effects of the medicines are reduced.

The invention relates to a pneumoperitoneum-free peritoneoscope suspending type abdominal wall puncture device, and overcomes the defect that secondary trauma occurs easily to patients by using a kirschner pin to puncture into abdominal walls to suspend the abdominal walls. The puncture device comprises a sleeve and a plurality of supporting arms arranged on the sleeve in a central radial shape, wherein a deformation portion is connected to the end portion of the sleeve and connected with the supporting arms; and one ends of pull ropes are fixed on the end portion of the supporting arms, lugs with rope holes are arranged on the sleeve away from the deformation portion, and the other ends of the pull ropes penetrate through the rope holes in the lugs to be fixed on the outer portion of the abdominal wall. A supporting surface is arranged after the supporting arm is opened, and a barrel-shaped space is formed after the supporting arm is suspended, so that enough surgical fields are provided during the surgery; and the supporting arm of the puncture device is inserted from a cut of the abdominal wall and is opened gradually, so that the kirschner pin is not needed to perform puncture and suspension, the secondary trauma is prevented, and the puncture device is helpful for alleviating traumatic pains of patients.

The invention discloses a laparoscopic object obtainer and relates to a device for taking out and removing organs during surgical and gynecological abdominal cavity operations. The device comprises a casing gun and an elastic rigid sheet connected to the front end of the casing gun, wherein the elastic rigid sheet is provided with an object obtaining bag, the object obtaining bag is provided with a contracting ring along an opening, a binding rope is arranged in the contracting ring and extends outward, the elastic rigid sheet and the object obtaining bag are connected through connecting points, the object obtaining bag is made of high-strength TPU material, 20 to 40 of the connecting points exist between the elastic rigid sheet and the object obtaining bag, and the width of each connecting point does not exceed 20 wires. The object obtaining bag and the elastic rigid sheet adopt the connection of the connecting points and are easy to break, the object obtaining bag falls from the elastic rigid sheet, a bag mouth contracts at the same time, the casing gun can be easily drawn out of a casing sheath, and the object obtaining bag can be drawn out along with the casing sheath after the operation is finished, thus the secondary insult during the operation is avoided, the operation time is saved at the same time, and the problem that the object obtaining bag is torn during the drawing further to endanger the service safety is avoided due to the fact that the object obtaining bag is made of high-strength TPU material.

The invention discloses an injectable articular cartilage tissue repair material and is characterized in that starting materials of the composite material contain the following components of: by weight, 100 parts of I-type collagen and 10-50 parts of hyaluronic acid, wherein oxidisability of hyaluronic acid is 20-60%. A monocyte layer in bone marrow fluid in vivo is embedded in the repair material. The thickness of the composite material is 1-5mm. Hyaluronic acid is oxidized into oxidized hyaluronic acid by the use of sodium periodate. The collagen solution, 5*PBS and a buffer are mixed at the volume ratio of 7:2:1 and the pH is adjusted to neutral. After dissolving oxidized hyaluronic acid by the use of ultrapure water, the dissolved oxidized hyaluronic acid is added into the neutral collagen solution and the mixed solution is uniformly stirred and stands in a refrigerator of 4 DEG C. The separated and extracted monocyte layer in the bone marrow fluid by a density gradient centrifugation method is uniformly mixed with the above collagen-oxidized hyaluronic acid solution. The mixed liquor is putted into a constant temperature incubator of 37 DEG C for standing or injection to the organism articular cartilage defects so as to form the composite material.

The invention relates to the technical field of medical dressing, in particular to medical and antibacterial cationic biogel dressing and a preparation method thereof. The medical and antibacterial cationic biogel dressing comprises raw materials in percentage by weight as follows: glycerin, chitosan quaternary ammonium salt, amino-acid iodine, organosilicon quaternary ammonium salt, an indigowoad leaf extraction solution, a prunella vulgaris extraction solution, a paniculate swallowwort root extraction solution and the balance of purified water. The antibacterial dressing has a remarkable antibacterial effect, is transparent, high in water content, non-toxic, harmless, nonirritating and good in biocompatibility and adhesion, can isolate bacteria, kill bacteria, fungi and viruses and prevent skin and mucous membranes from infection, can stop bleeding and keep the wound wet and further can promote skin regeneration and healing of the wound. The medical and antibacterial cationic biogel dressing can be widely used for preventing and treating infection of skin wound such as skin bruise, scalding, burning, bedsore, ulcer, vagina skin eczema and the like and local mucous membrane infection of an oral cavity, the throat, gingivae and the like and can relieve pains, inhibit bacteria, protect wound, promote wound healing and inhibit scarring.

The invention discloses a staged acting antibacterial hydrogel dressing and a preparation method thereof. The method comprises the following steps: preparing an antibacterial layer, namely adding sodium polyacrylate into a nano-silver solution, stirring to form a colloid, and drying the colloid to obtain the antibacterial layer; preparing a water absorbing and sustained release layer, namely dissolving pearl powder and bezoar in a carboxymethyl chitosan solution to obtain a mixed solution, slowly adding sodium polyacrylate into the mixed solution, and stirring along with adding until a transparent colloid is formed; preparing a waterproof breathable layer, namely adding polyvinyl butyral powder into an absolute ethanol solution, and dissolving to obtain a transparent liquid; and assembling, namely pouring the transparent liquid into a plate which is 1.5-2.5mm thick, covering a non-woven fabric, spreading the transparent colloid of the water absorbing and sustained release layer on the non-woven fabric to obtain a mixed layer, baking the mixed layer to adhere the transparent colloid and the transparent liquid together, and adhering the antibacterial layer to the transparent colloid of the mixed layer. The staged acting antibacterial hydrogel dressing has the advantage of remarkable wound healing promoting effect.

The invention discloses a preparation method of a composite antibacterial dressing loaded with silver sulfadiazine. The preparation method comprises steps as follows: (1), bacterial cellulose is obtained through static fermentation of acetobacter xylinum; (2), the bacterial cellulose is beat after alkali washing to be prepared into a homogeneous-phase suspension liquid; (3), a sodium alginate solution is prepared; (4), silver sulfadiazine is subjected to ultrasonic treatment in water; (5), the sodium alginate solution, the bacterial cellulose homogeneous-phase suspension liquid and a silver sulfadiazine suspension liquid are mixed and prepared into a homogeneous-phase mixed liquid; the homogeneous-phase mixed liquid is poured into a die and cured with a 5% CACl2 solution, and the sodium alginate and bacterial cellulose composite antibacterial dressing loaded with silver sulfadiazine can be obtained after freeze drying. The preparation method is simple and easy to operate, the obtained composite antibacterial dressing keeps good moisture retention performance and biocompatibility, has a better inhibition function on escherichia coli, candida albicans and staphylococcus aureus and facilitates wound healing and skin regeneration, and the production process is simple.

The invention discloses a hollow tubular multi-warhead nano tumor heat therapy instrument, which comprises an injection inner cavity, one end of which is provided with a T-shaped plug, wherein the outer side of the other end of the injection inner cavity is provided with an inner cavity convex edge; a coaxial injection outer cavity is outside the injection inner cavity; the inside diameter of theinjection outer cavity is equal to or slightly greater than the sum of the outside diameter of the injection inner cavity and the height of the inner cavity convex edge; the inner side, close to one end of the T-shaped plug, of the injection outer cavity is provided with an outer cavity convex edge; the height of the outer cavity convex edge is equal to or slightly smaller than the height of the inner cavity convex edge; the other end of the injection outer cavity is provided with a closed connecting plate; after a cavity probe passes through the connecting plate, the probe tail is positionedin the injection outer cavity, and the probe body of the cavity probe is positioned in a probe outer tube; one end of the probe outer tube is a cylindrical tube body, positioned outside the injectionouter cavity and coaxial with the injection outer cavity; and the other end of the probe outer tube is a conical tube body with an open conical end. The invention has the advantage that: a plurality of injection needles spread to form an umbrella shape and encircle the tumor after penetrating the tumor, so that secondary trauma caused by interventional therapy is avoided.

The invention discloses a rat endotracheal intubation method and application. The method mainly comprises the following steps that an anesthetic rat is placed on the back and fixed, the upper and lower jaws of the rat are opened, the rat's glottis is exposed by means of a laryngoscope, and a tracheal tube, which is 6 to 7cm long, is directly inserted into the trachea, namely the opening and closing part of the glottis, by means of the observation of the laryngoscope; a thin steel wire is inserted into the tracheal tube and a small section of water column is inected; the water column movement change in the tracheal tube is observed, if the water column doesn't move or is sprayed out or sucked in violently, it means that the tracheal tube is enters the esophagus, and intubation is needed again; if the water column in the tracheal tube moves up and down rhythmically along with the animal's breathing frequency, it means that the tracheal tube is inserted into the trachea. The method is used for endotracheal intubation under the conditions of rat trachea administration, rat administration and molding, and rat pulmonary function detection and the like, and the method has the advantages of being simple, speedy, free of injuries, high in molding and administration success rate, accurate in pulmonary function detection and the like.

The invention relates to a sitting, lying and transporting cart for a patient, which belongs to the technical field of medical instruments. When being used for trauma patient in the transporting process, the prior stretcher with the design defect can not be suitable for the patient transportation on various roads and causes the patient to feel uncomfortable or be afflicted with new secondary trauma. Both side surfaces of a backrest canvas stretcher (19) and a lower-body canvas stretcher (20) are respectively and fixedly provided with a limiting belt (16) and a belt buckle (17), four embedded blocks (10) are respectively fixed on the backrest canvas stretcher (19) and the lower-body canvas stretcher (20), the backrest canvas stretcher (19) and the lower-body canvas stretcher (20) are hinged by hinges (24), and both side surfaces of the lower-body canvas stretcher (20) are respectively provided with a seat thread hole (5) and a stretcher thread hole (6). The sitting, lying and transporting cart has the advantages of novelty, creativity and practicability.

The invention belongs to the technical field of biomedical dressings and relates to an end-capped modified polyethylene glycol cross-linking agent having an ultraviolet light response function, a preparation method and a hydrogel dressing containing the cross-linking agent and a preparation method thereof. The technical problem is solved that wound pain and secondary wounds care caused by when anexisting hydrogel dressing is removed for secondary wound treatment. The modified polyethylene glycol cross-linking agent having the ultraviolet light response function is formed by adopting an injectable in-site gel forming mode, and the gel forming mode has very good adaptability to wound shapes and meanwhile has better fitting property compared with a blocky dressing to be gelled without auxiliary fixing materials. When wounds need to be further treated, regional selective irradiation can be performed through 10 mw / cm<2> ultraviolet light of 365 nm, gel softening and degradation are achieved. Compared with other dressings, the function can prevent wound pain during gel removal and prevent newly growing tissues from being physically harmed to cause secondary wounds.

The invention belongs to the technical field of medicine and health and particularly relates to a preparing method of a silver-containing anti-bacterial dressing. According to the method, degreased cotton gauze serves as a base dressing to be improved, at first, the degreased cotton gauze is subjected to carboxymethylation modification and endowed with a high hygroscopic property, then by means of the in-situ reduction effect, nanometer silver particles directly cover the modified degreased cotton gauze, the nanometer silver particles are combined with the degreased cotton gauze closely and do not fall off, and the obtained silver-containing anti-bacterial dressing has a high anti-bacterial property and a high hygroscopic property, does not stick to wounds and avoids secondary trauma and infection of the wounds, so that healing of the wounds is accelerated.

The invention discloses a built-in multidirectional adjusting type craniocerebral drainage device. The drainage device is composed of a drainage tube, a fixator, a valve and a drainage bag. A tube body of the drainage tube is composed of an inner tube and an outer tube, which are coaxial and can be freely detached; the middle section of the inner tube has a pre-plastic structure; the top end of the inner tube is provided with an under-ray developing coating; a side opening is formed in the upper half section of the inner tube; threads are arranged at the tail end of the inner tube; an annularsoft plug sleeves the tail end of the inner tube and can be tightly clamped between the tube walls of the inner tube and the outer tube; elastic buckles are arranged on the outer tube wall, and open holes are formed in the corresponding positions; and marks are arranged at the tail end of the inner tube, and angle scale marks are arranged at the tail end of the outer tube, so that the rotation direction of the inner tube is controlled thereby. The drainage device can be combined with CT to flexibly adjust the direction within the effective radius range to conduct accurate positioning drainageon hematoma or hydrops and hydrops. By the device, the first suction rate of intracranial hematoma is increased, the mass effect of hematoma and postoperative encephaledema are reduced, intracranial pressure can be rapidly reduced, and accurate and effective target treatment is achieved.

The invention discloses a convenient wheelchair. The convenient wheelchair comprises a seat device and a vehicle wheel device. The seat device comprises a vehicle frame, a backrest, a seat body, armrests and pedals, and the backrest, the seat body, the armrests and the pedals are connected with the vehicle frame. the vehicle wheel device comprises two hand wheels arranged at the outer sides of the armrests, an axle traversing the vehicle frame and connected with the two hand wheels, and vehicle wheels connected with the lower end of the front side of the vehicle frame and arranged at the inner sides of the hand wheels. The vehicle wheels are also connected with a motor, a storage battery and a solar cell panel, a massage back cushion is arranged at the inner side of the backrest, an object placing plate is in rotary joint with one armrest, a rearview mirror is arranged on one surface of the object placing plate, and a hanger is arranged on the top of the backrest. Compared with the prior art, the convenient wheelchair is advantaged in that by arranging the object placing plate, the rearview mirror and the massage part, a user can use the convenient wheelchair conveniently and comfortably; by employing a wear-resisting shock-absorption composite material, the weight of the whole wheelchair is reduced, and the convenient wheelchair is light and shock-absorbent; secondary damage of the disabled is avoided, and the convenient wheelchair is comfortable and convenient.

The invention discloses a medical dressing material and its preparation method. The medical dressing material comprises, by weight, 5-50% of alginic acid fiber, 1-15% of bamboo fiber and 40-90% of viscose fiber. The medical dressing material has effects of haemostasis and bacteriostasis, can absorb lots of pus and blood and form a humid microenvironment to promote growth and multiplication of cells and wound healing, is nonirritating to human body, and has no anaphylactic reaction. Especially by the application of bamboo fiber, wound infection and inflammation of patients are avoided due to natural antibiotic bacteriostasis effect of the bamboo fiber.

The invention provides a hydrogel, a preparation method thereof, a biomembrane fixing device and an application of the hydrogel, and relates to the technical field of biological materials. Raw materials of the hydrogel comprise a synthetic monomer, a solubilizer, a cross-linking agent, an initiator, a catalyst and water, wherein the synthetic monomer comprises hydroxyethyl methacrylate (HEMA) and / or a derivative of HEMA. The usage amount the raw materials are as follows: the mass ratio of the synthetic monomer to water is (0.5-20):1; the mass ratio of the solubilizer to water is (0.1-10):1; the mass ratio of the cross-linking agent to water is (0.001-0.5):1; the mass ratio of the initiator to water is (0.05-2):1; and the mass ratio of the catalyst to water is (0.05-2):1. The hydrogel has good biocompatibility, stability and hydrophilicity, excellent water absorption and swelling performance, good optical performance, high mechanical performance and soft texture. The biomembrane fixingdevice prepared by using the hydrogel has small foreign body feeling and is comfortable to wear.

The invention discloses a method for performing nipple retraction correction through a trocar. The method comprises the following steps of 1 preoperative preparation, 2 nipple puncture, 3 plastic needle tube retention, 4 threading, 5 fixing support placement and 6 correction and fixation. The method has the advantages that the trocar is used for performing nipple retraction correction more conveniently and rapidly; tissue cutting caused by only adopting a steel wire for suspending a nipple is avoided, and surgical wounds and patient's pain are reduced; 3, in the later period, when the hangingtension of a suture needs to be adjusted, the suture can be replaced through an indwelling needle tube at any time, the nipple is fixed again, and secondary wounds caused to the nipple are avoided; the plastic needle tube punctures the root of the nipple, the corrected nipple is effectively supported, and nipple retraction is avoided.

The invention relates to the field of animal marking instruments, in particular to a minimally-invasive gap-controllable mouse chip ear tag and a loading device thereof. Punching pliers, a bracket, aguide boss I, a guide boss II, an ejector shaft, a limit disc, a spring I, an ejector pin, a stabilizing block, an ear tag shell, a clamping plate I, ear tag needles, a clamping plate II and an ear tag body are included. According to the minimally-invasive gap-controllable mouse chip ear tag and the loading device thereof, mouse ear punching and ear tag assembling integrated operation is adopted,and the two steps of ear tag punching and ear tag fixing are synchronously carried out. According to the device, the clamping plate I for ear tag needle arrangement and the clamping plate II for ear tag needle arrangement are respectively arranged in the ear tag shell, and multi-station lateral moving type pushing separation is adopted, so that the situation that the ear tag needles need to be independently picked each time to be assembled and fixed to the ear tag body is avoided; and the ear tag needle and the ear tag body in the next group of station can enter a to-be-punched station only bymoving the clamping plates, so that the operation is effectively simplified, the time and labor for picking, pairing and subsequent experimental data acquisition are saved, and the data acquisition intelligence is realized.

The invention discloses a single-hole multichannel rotatable operating device of a laparoscope. The single-hole multichannel rotatable operating device comprises an expansion cylinder and is characterized in that a surgery channel is formed in the middle of the expansion cylinder, the front portion of the expansion cylinder is small, the rear portion of the expansion cylinder is large, the external circle of the expansion cylinder is in arc-shaped transition from front to rear, the front end of the external circle of the expansion cylinder is provided with clamping lugs used for preventing the retreating of the expansion cylinder, and the upper end of the external circle of the expansion cylinder is provided with a fixing lug which is sewn with the skin of a patient to fix expansion cylinder to the patient; the top of the expansion cylinder is provided with an inner cover which can rotate around the peripheral direction of the central axis of the expansion cylinder in a reciprocating manner, and the inner cover is provided with a plurality of puncture bayonets communicated with the surgery channel; the lateral wall of the expansion cylinder is provided with an air inlet and an air outlet. The single-hole multichannel rotatable operating device has the advantages that the rotation of a surgical tool is facilitated so as to perform surgery on an affected part from different angles, and the device is simple and convenient to operate, capable of avoiding secondary injury of the patient and capable of guaranteeing fast recovery; the passing ability and sealing performance of the puncture bayonets can be increased favorably by a sealing component, and surgery operating efficiency is increased favorably.

The invention relates to a preparing method of a graphene oxide antibacterial mildew-resistant medical bandage. The method includes evenly spraying gauze with a prepared antibacterial mildew-resistant agent through a spraying process to obtain the antibacterial mildew-resistant medical bandage. Antibacterial mildew-resistant and peculiar smell-removing effects of the bandage are significantly improved through synergistic effects of nanometer graphene oxide, a wild lily bulb extract and nanometer metal-supported graphene oxide. The mildew-resistant level of the bandage is the zero level. The bacteriostatic rate of the bandage for staphylococcus aureus is 99.91%, the bacteriostatic rate of the bandage for escherichia coli is 99.23%, the bacteriostatic rate of the bandage for helicobacter pylori is 99.0%, the bacteriostatic rate of the bandage for candida albicans is 98%, and the bacteriostatic rate of the bandage for mould is 100%. For the gauze sprayed with the antibacterial mildew-resistant agent, nanometer particles penetrate into the gauze and inner cohesiveness of the gauze is enhanced, and therefore hairiness is greatly reduced, and secondary wounds when the bandage is used by a patient are avoided.

The invention provides a preparation method of a medical dressing, which includes preparation of secreted PLGA sustained-release microspheres, preparation of a hydrogel, preparation of an electrospunmembrane, and preparation of a stem cell secretion medical dressing. In the invention, a combination of sub-totipotent stem cell secretin, PLGA sustained-release microspheres and hyaluronic acid hydrogel is used, and the electrospun membrane is used as a carrier to prepare the medical dressing, the sub-totipotent stem cell secretion is rich in various active factors, and has a good repair effect on wounds; Experiments show that the medical dressing prepared by the invention has a good healing effect on both acute and chronic wounds. The medical dressing can adhere to the wound well, and the sub-totipotent stem cell secretin in the PLGA sustained-release microspheres is slowly released, which greatly improves the utilization rate of the secretion and the durability, the PLGA slow-release microspheres contain a larger amount of subtotipotent stem cell secretions, which reduces the number of dressing changes, avoids secondary trauma during the dressing change, and facilitates wound repair.

The invention relates to an oral membrane for reconstruction of attached gingivae, and a preparation method thereof. The preparation method includes (1) dissolving type-I atelocollagen in an acid solution to prepare a collagen acid solution; (2) defoaming and freeze-drying the collagen acid solution to obtain sponge; (3) rolling the sponge to obtain the oral membrane, wherein the temperature of aroller is set as 30-40 DEG C. A compact and smooth film is formed on the surface of the oral membrane prepared by the preparation method, the mechanical properties are improved, and the oral membranecan be sewn; the artificial soft tissue transplant material does not need to be collected from patients themselves, so that the operation time is shortened, the occurrence rate of complications is reduced, and pain is relieved to the greatest extent.

A pneumoperitoneum-free peritoneoscope suspending type abdominal wall puncture device comprises a sleeve (1) and a plurality of supporting arms (3) arranged on the sleeve (1) in a central radial shape. A deformation portion (2) is connected to an end portion of the sleeve (1), and the supporting arms (3) are connected to the deformation portion (2). One end of each of pull ropes (4) is fixed on an end portion of the supporting arms (3), lugs (5) with rope holes (6) are arranged on the sleeve (1) away from the deformation portion (2), and the other end of each of the pull ropes (4) passes through the rope holes (6) in the lugs (5) and are fixed to the outer portion of the abdominal wall. A supporting surface is provided after the supporting arm (3) is opened, and a barrel-shaped space is formed after the supporting arm is suspended, so that enough surgical fields are provided during the surgery. The supporting arm (3) of the puncture device is inserted from a cut of the abdominal wall and is opened gradually, so that it does not need to perform puncture and suspension using the Kirschner pin, thereby avoiding the secondary trauma, and alleviating traumatic pains of patients.

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 discloses an all-terrain wounded person on-site carrying backpack for single-person search and rescue. The all-terrain wounded person on-site carrying backpack comprises a head part assembly, a back part assembly, a buttock part assembly, lower limb assemblies and foot assemblies, wherein each assembly is composed of a folding frame and a functional assembly installed in a filling mode; the head part assembly, the buttock part assembly, the lower limb assemblies and the foot assemblies are folded back through folding frames to form a backpack shape; the back part assembly can berapidly transformed into a stretcher through a folding frame; meanwhile, the fixing devices correspondingly designed for all the assemblies can be used for fixing a head position, a cervical vertebraposition, a thoracic vertebra position and a lumbar vertebra position and fixing the pelvis and fixing lower limbs and feet, so secondary trauma in the carrying process can be avoided after a woundedperson is stably fixed. Through the design of the invention, the all-terrain wounded person on-site carrying backpack is suitable for carrying the wounded person in all terrains, can complete carryingof the wounded person by a single rescuer, has the advantages of portability, rapidness, effectiveness in carrying, body position protection of the wounded person, prevention of secondary injury of the wounded person and the like, is suitable for mountain jungle rescue, water surface rescue and helicopter suspension rescue, and has better practical application effect.

The invention discloses a medical hydrogel foam dressing. The medical hydrogel foam dressing is prepared from the following components: polyurethane foam, pullulan, gelatin, konjac glucomannan, keratin fiber, beta-carotene, sodium D-glucuronate, magnesium chloride, earthworm dry powder, ginkgo flavone, cervus and cucumis polypeptide, panaxtrial saponins, a starch acrylic acid graft copolymer, trimethylolpropane glycidyl ether, glycerin and distilled water. The invention also discloses a preparation method of the medical hydrogel foam dressing. After a medical hydrogel foam dressing product prepared by the embodiment of the invention is used for 3 days, the wound healing rate is greater than 65 percent, the wound healing time is short, the wound healing effect is good, no scars are generated after healing, no adhesion exists between a wound and the medical hydrogel foam dressing, so that secondary injury caused by dressing replacement is avoided, and the market prospect is wide.

The invention discloses a medical band-aid with an adjustable opening, which comprises a first fixing part and a second fixing part that are mutually independent, wherein the sides, contacted with skin, of the first fixing part and the second fixing part are sticky; a plurality of movable connecting ends are connected between the first fixing part and the second fixing part; weakly sticky areas and strongly sticky areas are arranged at connecting parts between the connecting ends and the first fixing part or / and the second fixing part; and the weakly sticky areas or / and the strongly sticky areas are covered and bonded with a third fixing part. The connecting ends are further provided with adhesiveless areas, and the adhesiveless areas, the weakly sticky areas and the strongly sticky areasare sequentially connected. According to the medical band-aid, the tightness of a wound can be adjusted conveniently, and the medical band-aid facilitates quick healing of the wound and is convenientto use and strong in practicability.

The invention discloses a hollow tubular multi-warhead nano tumor heat therapy instrument, which comprises an injection inner cavity, one end of which is provided with a T-shaped plug, wherein the outer side of the other end of the injection inner cavity is provided with an inner cavity convex edge; a coaxial injection outer cavity is outside the injection inner cavity; the inside diameter of theinjection outer cavity is equal to or slightly greater than the sum of the outside diameter of the injection inner cavity and the height of the inner cavity convex edge; the inner side, close to one end of the T-shaped plug, of the injection outer cavity is provided with an outer cavity convex edge; the height of the outer cavity convex edge is equal to or slightly smaller than the height of the inner cavity convex edge; the other end of the injection outer cavity is provided with a closed connecting plate; after a cavity probe passes through the connecting plate, the probe tail is positionedin the injection outer cavity, and the probe body of the cavity probe is positioned in a probe outer tube; one end of the probe outer tube is a cylindrical tube body, positioned outside the injectionouter cavity and coaxial with the injection outer cavity; and the other end of the probe outer tube is a conical tube body with an open conical end. The invention has the advantage that: a plurality of injection needles spread to form an umbrella shape and encircle the tumor after penetrating the tumor, so that secondary trauma caused by interventional therapy is avoided.

The invention belongs to the technical field of biomedical dressings and relates to an end-capped modified polyethylene glycol cross-linking agent having an ultraviolet light response function, a preparation method and a hydrogel dressing containing the cross-linking agent and a preparation method thereof. The technical problem is solved that wound pain and secondary wounds care caused by when anexisting hydrogel dressing is removed for secondary wound treatment. The modified polyethylene glycol cross-linking agent having the ultraviolet light response function is formed by adopting an injectable in-site gel forming mode, and the gel forming mode has very good adaptability to wound shapes and meanwhile has better fitting property compared with a blocky dressing to be gelled without auxiliary fixing materials. When wounds need to be further treated, regional selective irradiation can be performed through 10 mw / cm<2> ultraviolet light of 365 nm, gel softening and degradation are achieved. Compared with other dressings, the function can prevent wound pain during gel removal and prevent newly growing tissues from being physically harmed to cause secondary wounds.