113 results about "Polypropylene mesh" patented technology

An implantable hernial prosthesis having top and bottom layers and a central sleeve to facilitate manual expansion and placement of the prosthesis within an incision in a patient. The top layer and a bottom layer are secured together with at least one seam at the perimeter of the prosthesis. The top layer is made of a synthetic mesh, preferably polypropylene mesh, to promote incorporation into the abdominal wall, and the bottom layer is made of the same material or in some cases of a mechanical barrier to prevent adhesions to the intestine. The top layer is provided with a central sleeve to introduce one or two fingers to expand the prosthesis in place, and also to introduce an articulated hernial stapler to secure the mesh into the abdominal wall.

An improved composite prosthesis for laparoscopic repair of inguinal or femoral hernias, and also for the laparoscopic repair of large incisional ventral hernias incorporates two different layers, namely an upper layer made of polypropylene mesh to promote tissue ingrowth, and a lower layer formed with an adhesion barrier material to prevent adhesions to the intestines. Both layers are secured together with a highly visible dark seam at the perimeter of the prosthesis to assist the surgeon in visualizing the peripheral edge. The lower layer is slightly larger than the polypropylene mesh so there is an adhesion barrier edge around the prosthesis to conceal the edges of the polypropylene mesh. The upper layer includes a guiding cone to facilitate placement of the prosthesis at the exact center of the hernial defect. The base of this cone is attached to the central part of the prosthesis, and the apex of the cone will be attached later to a guiding thread that is inserted to from the outside of the abdomen using a long straight needle through the skin and hernial sac. Furthermore the laparoscopic hernia prosthesis lower layer is provided with a bounding rim to guide the tip of the spiral tacker to the very edges of the prosthesis in order to stretch the prosthesis in place, and also to conceal the staples or tacks.

The present invention discloses an antiblocking hernia patch and a preparation method thereof. A polypropylene net is combined with an absorptive material chitosan antiblocking piece to prepare a partial absorptive composite mesh. The invention is characterized in that the absorptive material chitosan antiblocking piece is prepared from water-soluble chitosan by a tap casting method. The chitosan phlegm is arranged between the polypropylene net and the absorptive material chitosan antiblocking piece. The preparation method comprises the steps of preparing the chitosan antiblocking piece, uniformly coating one layer of chitosan on the polypropylene woven mesh, then placing the chitosan antiblocking piece on the polypropylene woven mesh, placing the polypropylene woven mesh between the moulds after compressing, and obtaining the antiblocking hernia patch after drying by a film isolation method in the environment at a temperature of between 15 DEG C below zero and 150 DEG C and pressure of 0 to 0.6MPa. The antiblocking hernia patch of the invention has the advantages of effectively preventing the blocking after surgery, increasing the anti-inflection effect, sustaining the excellent repairing strength, reducing the recurrence rate and complication after surgery, reducing the probability of adverse effect caused by the unthorough elimination of acid, simply controlling preparation process and eliminating the adverse effect which may be caused by the chemical process.

A floatable-material harvester is disclosed, including a vacuum source, transport hose, and a floatable-material receiver. In one embodiment, the transport hose has at least one air inductor/intake along its length, which allows air to enter the transport hose to accelerate its contents, by negative pressure air induction. In another embodiment, a transport hose has at least one floatable-material thruster along its length, comprised of at least one nozzle, which provides pressurized fluid (e.g., air or water) in the direction of the flow of the harvested floatable material by positive pressure induction. A method is disclosed whereby the floatable material harvester is used to harvest an absorbent material (e.g., wood chips, straw, perlite, zeolite, polypropylene mesh, titanate nanofibres) that has absorbed a pollutant (e.g., oil, solvent, radioactive isotopes) from a beach or in water.

A floatable-material harvester is disclosed, including vacuum source, transport hose, and a floatable-material receiver. In one embodiment, the transport hose has at least one air inductor/intake along its length, which allows air to enter the transport hose to accelerate its contents, by negative pressure air induction. In another embodiment, a transport hose has at least one floatable-material thruster along its length, comprised of at least one nozzle, which provides pressurized fluid (e.g., air or water) in the direction of the flow of the harvested floatable material by positive pressure induction. A method is disclosed whereby the floatable material harvester is used to harvest an absorbent material (e.g., wood chips, straw, perlite, zeolite, polypropylene mesh, titanate nanofibres) that has absorbed a pollutant (e.g., oil, solvent, radioactive isotopes) from a beach or in water.

The invention discloses a preparation method of an anti-adhesion polypropylene mesh coated with polydopamine for abdominal wall defect repair and an obtained mesh material. The mesh uses a mesh woven by using polypropylene as a skeleton and the surface is coated with polydopamine; the mesh has the characteristic of reinforcing abdominal wall tension, preventing adhesion and tolerating infection, can be placed in a peritoneal cavity and is a brand new medical abdominal external hernia repair material. The specific preparation method of the mesh comprises the steps of putting the polypropylene mesh in trometamol solution, then adding dopamine hydrochloride and performing conditioned reaction to finally obtain the anti-adhesion polypropylene mesh coated with polydopamine.

The present invention provides an implantable prosthesis comprising a viscera separating barrier that defines a shell having a pocket with an opening that receives an insert. It is contemplated that the insert comprises at least one of an absorbable mesh, a non-absorbable mesh, or an absorbable and non-absorbable mesh combination inserted into the pocket through the opening. In preferred embodiments the viscera separating barrier is acellular collagen, and the absorbable mesh is selected from at least one of a polyglactin, a polyglycolic acid, a polyglactin and a polylactic acid, and the non-absorbable mesh comprises a polypropylene mesh. It is contemplated that the viscera separating barrier acts to reduce or even eliminate attachment of viscera to the prosthesis to encourage rapid cell penetration and revascularization; the non-absorbable mesh will provide immediate, reliable in-growth; and the absorbable mesh will give stability to the prosthesis.

The invention discloses a method for preparing high-purity low-sulfur expanded graphite, which belongs to the preparation method of expanded graphite. The existing chemical method of the present invention to prepare expanded graphite has the technical problems of low product purity and high production cost. The method of the present invention: 1. high-temperature purification of phosphorus flake graphite; 2. putting it into a polypropylene mesh bag, soaking it in peroxide water, and lifting it to pour water; 3. wrapping the graphite block with a polypropylene mesh bag as an anode, and putting In the graphite electrolytic cell, then inject the electrolyte solution, use graphite as the cathode, and then electrolyze. During the electrolysis process, the polypropylene mesh bag is inflated and stirred; 4. Constant temperature drying and expansion; that is, high-purity low-sulfur expanded graphite is obtained. The method of the invention is simple and easy to operate, and the degree of intercalation can be controlled by adjusting the current intensity and electrolysis time, and the prepared high-purity expanded graphite is low in sulfur, and there is no pollution to the water body during the washing process, and no other impurities are doped in the product. The invention uses a small amount of oxidant to trigger, little or almost no pollution in production, and relatively low production cost.

The invention relates to a chitosan biofilm polypropylene mesh and a preparation method thereof. According to the invention, a polypropylene mesh is processed by using waterless ethanol and deionized water; the polypropylene mesh is modified by using 1.0 to 5.0% of a chitosan film forming solution through a process of biofilm forming, such that a chitosan biofilm polypropylene mesh is obtained. The method of the invention is simple and operable. No toxic or harmful reagent is included. No adverse effect is brought to subsequent applications of the medical mesh. According to the invention, the polypropylene mesh has a high porosity, peripheral tissue can well contact and grow on the polypropylene mesh, such that the anti-stretching property of a repaired part is enhanced; also, chitosan has a good biocompatibility, such that complications such as polypropylene mesh erosion, exposure and tissue adhesion at an implantation position are effectively reduced. The chitosan biofilm polypropylene mesh is especially suitable for clinical women pelvic reconstructive surgery. With the chitosan biofilm polypropylene mesh, histocompatibility of the polypropylene materials in pelvic reconstructive operations is improved, and pelvic reconstruction postoperative complications are reduced.

The invention discloses high-strength impermeable anti-freezing concrete and a preparation method thereof. The high-strength impermeable anti-freezing concrete is prepared from the following raw materials: cement, water, sand, stones, fly ash, an anti-freezing agent, a rust-inhibiting anti-corrosion waterproof agent, waste concrete particles and waste rubber particles. The anti-freezing agent is prepared from the following components in parts by weight: 3.4 to 6.8 parts of modified coal gangue; 1.2 to 2.0 parts of rice hull ash, 1.5 to 3 parts of vinyl acetate-ethylene copolymer latex powder;0.8 to 1.6 parts of silicon powder; 2.4 to 3.8 parts of polypropylene reticular fiber; 0.8 to 1.6 parts of seaweed extract; 0.9 to 1.8 parts of urea; 1.4 to 2.2 parts of calcium nitrite and 10 to 20 parts of water. The high-strength impermeable anti-freezing concrete has the advantages of effective utilization of waste materials, strong freeze-thaw resistance and mechanical properties, reduction of freeze-thaw diseases of concrete in cold regions, and purification of automobile exhaust.

A padded corner bumper comprises an elongated core formed of a cushioning material, an outer decorative cover formed of vinyl-coated fabric, and a backing material formed of polypropylene mesh. The core has a front, a back coextensive with the front, and a continuous side edge extending between the top and bottom. The outer decorative cover and backing material are stitched together to form a casing that completely surrounds the core, the backing being positioned only over the back of the core. The padded corner bumper is sufficiently flexible to allow it to wrap around an outside corner created by two mutually perpendicular surfaces. The corner bumper has a non-uniform horizontal cross section perpendicular to the axis. For three-sided corners, a top cushion is attached to a second side cushion that wraps around the vertical edge.

The present invention discloses a preparation method of a material for abdominal wall defect intraperitoneal repair, and the obtained material thereof. The preparation method comprises: 1, preparing a quaternized bacterial cellulose solution; 2, carrying out polydopamine modification on a polypropylene mesh sheet; and 3, coating the quaternized bacterial cellulose solution on the obtained polypropylene mesh sheet. The present invention further provides the material used for the abdominal wall defect intraperitoneal repair and obtained through the process. The obtained material of the present invention has characteristics of good mechanical property, good biocompatibility, good adhesion resistance and good antibacterial property.

A transobturator technique was developed for treating male urinary incontinence. This approach helped to design specific instruments to pass around the ischio-pubic branches of the male pelvis from inside to outside (i.e from the suburethral space to the thigh fold). The inside-out transobturator sling technique uses specific instruments and a polypropylene mesh with two arms that are passed inside to outside through the obturator foramens, pulled for compressing the bulbar urethra upward, and tied to each other across the midline. The mesh passes around the ischio-pubic branch before being tied under the bulbar urethra where it brings tension and support.

Implant systems and methods are provided to include a treatment material with a pelvic implant device. The pelvic implant device, such as an incontinence sling, can include the treatment coating combination of polycarbonate (PC) and an infection prevention material, such as InhibiZone® (IZ) technology. The treatment material can be coated onto, or impregnation or integrated with, polypropylene mesh in order to prevent infection and promote healing.

A method of making a composite prosthetic device, such as a hernia repair device, includes providing a support layer, juxtaposing a layer of an absorbable material with the support layer, and disposing an absorbable adhesive between the support layer and the layer of an absorbable material. The method includes heating the layers for melting the absorbable adhesive so as to bond the support layer with the layer of the absorbable material. Before the heating step, the moisture content of at least one of the layers is increased for improving thermal conductivity between the layers so as to enhance the strength of the bonds formed between the layers. The moisture content may be increased by exposing at least one of the layers to an environment having elevated relative humidity. In one embodiment, the support layer is polypropylene mesh, the layer of the absorbable material is oxidized regenerated cellulose, and the absorbable adhesive is polydioxanone.

The invention provides a Hirudo nipponia net cage breeding method and a special net cage thereof. The escape prevention and feeding functions of Hirudo nipponia are integrated, and the Hirudo nipponia net cage breeding method and the special net cage of the Hirudo nipponia net cage breeding method can adapt to pond breeding, cement pit breeding, breeding in a laboratory and various conditions. According to the special net cage for the Hirudo nipponia net cage breeding, the net cage is of a closed structure of a hollow-structure cuboid or cube, a metal or plastic framework is arranged on the inner side of the net cage, polyethylene or polypropylene meshes adhere to the framework, and the whole special net cage mechanism is supported by the framework and is stable. The problems that Hirudo nipponia feeding is difficult, aquaculture water can be easily polluted, the death rate of the Hirudo nipponia is high, the Hirudo nipponia can be easily invaded by natural enemies, and escape prevention is difficult are solved, and conditions are created for large-scale breeding of the Hirudo nipponia.

The invention relates to a polypropylene mesh/electro-spinning nano-fiber membrane as well as a preparation method and an application thereof. The polypropylene mesh/electro-spinning nano-fiber membrane is prepared through the following steps: (1) preparing a chitosan-polyethylene glycol hydrogel; (2) preparing basic fibroblast growth factor (bFGF) embedded polylactic acid-poly lactic-co-glycolic acid (PLGA) microspheres; (3) preparing an electro-spinning solution; (4) preparing the polypropylene mesh/electro-spinning nano-fiber membrane by use of an electro-spinning method. According to the polypropylene mesh/electro-spinning nano-fiber membrane, the polypropylene mesh and the nano-fiber membrane are compounded creatively, and therefore, the biocompatibility of the polypropylene mesh is improved by use of the nano-fiber membrane and the tensile strength of the nano-fiber membrane is improved by use of the polypropylene mesh, and the polypropylene mesh and the nano-fiber membrane supplement each other; in addition, the microspheres are introduced to realize controlled drug release; as a result, lots of defects of the clinical existing polypropylene meshes can be overcome.

The invention provides a complex hernia patch and a preparing method and application thereof. The complex hernia patch comprises three layer structures which are an outer biological layer, an inner supporting layer and an outer biological layer from bottom to top respectively, wherein the outer biological layers are accellular stent layers, and the inner supporting layer is a polypropylene mesh layer. The complex hernia patch prepared through the preparing method comprises the three layer structures, accellular stents in contact with tissue are located on the outer layers, cells can be induced to grow, and thus infection of a hernia coloboma part and formation of scars can be reduced; the polypropylene mesh layer serves as the inner supporting layer so that the mechanical strength of the complex hernia patch can be maintained, the stability of the patch can be improved, and high abdomen expansion pressure can be borne; furthermore, the binding force of the inner layer and the outer layers is good, and thus the problems that due to the fact that the strength of an existing product is not stable, high abdomen expansion pressure cannot be borne, a stent is gradually degraded after cells grow into the stent, consequently tardive pain of hernia repair is brought and relapse is likely to occur can be effectively solved; in addition, the preparing method is simple and capable of being applied to industrial production.