47 results about "Surgical adhesive" patented technology

Fast curing surgical adhesives and sealants contain an NCO-terminated hydrophilic urethane prepolymer derived from an aromatic diisocyanate and a polyol. Substantially all the aromatic diisocyanate used to prepare the NCO-terminated hydrophilic urethane prepolymer is in the para form. Optionally, the aromatic diisocyanate is substituted with at least one electron withdrawing group, such as, for example, a fluorine group.

The present invention provides a liquid polymer composition which can be implanted into a living mammal and which forms a solid hydrogel by in situ polymerization upon contact with body fluid and tissue. The composition also can be used as a coating on a medical device, or for the formation of a medical device. Formation of a solid implant or coating involves crosslinking of the adhesive with itself and with surrounding tissue. The liquid implant, by itself or in conjunction with various prostheses, can be used for many purposed, including fixation of the urethra for providing treatment for incontinence, and repair of herniations in the abdominal cavity, including rectocele, cystocele, enterocele, and inguinal hernia. The adhesive may be used to establish adhesion prevention during such repairs, in part by coating or being the material of a repair mesh.

The invention provides fibrin-based, biocompatible materials useful in promoting cell growth, wound healing, and tissue regeneration. These materials are provided as part of several cell and tissue scaffolding structures that provide particular application for use in wound-healing and tissue regenerating. Methods for preparing these compositions and using them are also disclosed as part of the invention. A variety of peptides may be used in conjunction with the practice of the invention, in particular, the peptide IKVAV, and variants thereof. Generally, the compositions may be described as comprising a protein network (e.g., fibrin) and a peptide having an amino acid sequence that comprises a transglutaminase substrate domain (e.g., a factor XIIIa substrate domain) and a bioactive factor (e.g., a peptide or protein, such as a polypeptide growth factor), the peptide being covalently bound to the protein network. Other applications of the technology include their use on implantable devices (e.g., vascular graphs), tissue and cell scaffolding. Other applications include use in surgical adhesive or sealant, as well as in peripheral nerve regeneration and angiogenesis.

A method for repairing a defect in living mammalian tissue comprising: covering a tissue defect and surrounding tissue with a prosthetic by placing the prosthetic over the defect and against the surrounding tissue. The method includes applying a surgical adhesive to the prosthetic on the surrounding tissue on at least one location on the prosthetic and the surrounding tissue so that surrounding tissue and the prosthetic adhere to each other.

A surgical tissue adhesive composition contains at least one 1,1-disubstituted electron-deficient olefin macromer. The adhesive composition of the invention has improved biocompatibility as well as controlled biodegradation characteristics and bioactivity. Adhesive co-monomer compositions contain at least one macromer with a pendant oligomer, polymer, or peptide chain as an acrylic ester of the reactive olefin. The polymers formed therefrom have a grafted brush-like nature. The composition is particularly useful for creating an adhesive bond at the junction of living tissue in surgical applications. The adhesive composition may further comprise co-monomer, co-macromer, cross-linker, or inter-penetrating polymer compounds containing peptide sequences that are bioactive or enzyme responsive. The peptide sequences are selected to promote tissue infiltration and healing in a particular biological tissue. The sequences may contain specific cell-adhesion, cell-signaling, and enzyme-cleavable domains. Furthermore, a degradable filler material may be included in the composition to create a reinforced composite. The filler preferably has a higher degradation rate than the polymer matrix, generating porosity upon degradation. The adhesive may further contain entrapped or incorporated drugs or biologics, including antibiotics or growth factors. The adhesive can be used to bind together the edges of living tissues during surgical procedures. The cured composition provides interfacial bonding and mechanical fixation while promoting tissue infiltration and replacement of the adhesive polymer.

An adhesive applicator for applying medical adhesives, particularly cyanoacrylates, to incisions such as those made during minimally invasive surgery. The applicator employs a pipette tip or similar narrow flow restrictor tip to close the incision and a body of foam to seal the incision. Methods of using the applicator are also disclosed.

In situ application of reinforced adhesive: applying uncured and curable matter to a surface, applying biocompatible inert reinforcing agent comprising at least one curing agent to the uncured composition; allowing curing within subject, cured composition together with the added reinforcing agent being configured to have improved mechanical support and strength.

This application describes specific ratios of raw ingredients and methods of combining and reacting those ingredients to obtain polyurethane prepolymers optimized for the special purpose of forming bonds to living tissue, or of bulking or sealing it. Preferred prepolymers are based on polyalkylene oxides, particular copolymers of ethylene oxide and propylene oxide. Important method steps are rigorous drying and deionization, and rigorous control of temperature during synthesis and use.

An apparatus which is self-contained, disposable, and heated utilized for maintaining and heating sterile solutions during medical procedures. The heating mechanism is chemical, electrical or a combination of both. Further the apparatus serves as a self sealing container for the application of solution. Sterile solutions such as special surgical adhesives thrombolytic or temperature specific drugs can be repeatedly heated and used during medical procedures. The apparatus also serves as method to maintain solutions sterile and heated for long periods of time during medical procedures. Another purpose of the invention is to have the distill end of the scope uniformly and completely coated by submerging it into the solution within the apparatus. Heat is transferred from the solution to the instrument in one example to act as an additional measure to prevent fogging of the lens. This apparatus is ideal for operations where the instrument is used intermittently and repeatedly.

A bioadherent composition includes a first mixture containing a plurality of reactive members of a specific binding pair, said reactive members being bound to a ligand capable of binding a receptor on biological tissue, and a second mixture containing a plurality of complementary reactive members of the specific binding pair, said complementary reactive members being bound to a ligand capable of binding a receptor on biological tissue, said reactive members capable of forming covalent bonds with said complementary reactive members via a reaction selected from Huisgen cycloaddition reactions, Diels-Alder reactions, and/or thiol-alkene reactions. A method for bonding biological tissue involves utilizing the bioadherent composition.

The present invention is a polymerization initiator paste composition which comprises (A) an organoboron compound which is liquid at 25 DEG C and (B) particles having an average particle diameter of 0.001 to 50 mu m and inert to the organoboron compound (A), in an amount of 4 to 400 parts by weight based on 100 parts by weight of the organoboron compound (A), and has a consistency, as measured at 25 DEG C under a load of 300 g in accordance with a method defined in ISO4823, of 15 to 100 mm. This composition constitutes a dental kit or the like together with a polymerizable monomer separately packaged. According to the present invention, an organoboron compound can be used safely, and because the composition is a paste, it is very easily utilized.

The invention provides a medical adhesive. The medical adhesive is mainly composed of glutaraldehyde and gelatin. Under the condition of 30-70°C and the mass ratio of glutaraldehyde aqueous solution to gelatin aqueous solution is 0.01-2, it reacts for 5-100 seconds to form gel Glue, the gel is used as a medical adhesive for bonding biological tissues during the generation process. After the gel is generated, it will no longer adhere to other biological tissues. The adhesive strength of the gel is 20gf/cm ² Above, the gel tensile strength is 20gf/cm ² Above, the water content of the gel is 80% to 95%. The mass concentration of the gelatin aqueous solution is 5%-40%, and the mass concentration of the glutaraldehyde aqueous solution is 0.01%-10%. The adhesive of the present invention is immersed in a phosphate buffer solution with a weight ratio of 5 times, soaked at 37° C. for 1 minute, and the extracted glutaraldehyde concentration is 0-50 μg/mL. The medical adhesive has excellent biological safety and strong adhesion, and is suitable for surgical operations as a surgical adhesive to adhere biological tissues, and can also be used as a hemostatic material, an air leakage prevention material, a tissue repair material, a regenerative medical support, etc.

A method for performing end-to-end vessel anastomosis includes providing a vessel support including a vessel receiving portion and a handle portion extending therefrom. The vessel receiving portion is an annulus. The vessel receiving portion is positioned around the end of a first vessel and the end of the first vessel is everted about the outer diameter of the vessel receiving portion such that the inner surface of the vessel is directed outwardly. The end of the second vessel is positioned over the everted end of the first vessel such that the inner surface of the second vessel is disposed against the inner surface of the first vessel. The ends of the vessel are secured either with a suture or a surgical adhesive. The handle portion of the vessel support may be removed.

A method for performing end-to-end vessel anastomosis includes providing a vessel support including a vessel receiving portion and a handle portion extending therefrom. The vessel receiving portion is an annulus. The vessel receiving portion is positioned around the end of a first vessel and the end of the first vessel is everted about the outer diameter of the vessel receiving portion such that the inner surface of the vessel is directed outwardly. The end of the second vessel is positioned over the everted end of the first vessel such that the inner surface of the second vessel is disposed against the inner surface of the first vessel. A surgical adhesive is provided and is used to adhere the ends of the vessels together without requiring the application of heat or radiant energy. The handle portion of the vessel support may be removed.

The invention relates to a novel moisture activated solvent-free latent curing adhesive or sealant mixture comprising (1) a selected poly (alkylene oxide) imine, and (2) a selected amine reactive moiety.

Surgical adhesives that include a blend of two different thermoreversible gelling polymers and a crosslinking agent are described. The first thermoreversible gelling polymer is partially or fully acrylated and the second thermoreversible gelling polymer includes dual functionality including acrylate functionality and amine-reactive functionality. The adhesives can provide gelling and covalent crosslinking within the polymers of the adhesive as well as crosslinking with surrounding tissue.

Biocompatible, triggerable degradation, polymerizable hydrogels, uses and delivery devices are disclosed. These hydrogels are at least substantially water soluble macromers, having a variety of uses especially for ocular therapy. The macromers include at least one water soluble region, at least one region which is degradable via a triggering event, usually by hydrolysis, and at least two free radical-polymerizable regions. The regions can, in some embodiments, be both water soluble and trigger able degradable. The macromers are polymerized by exposure of the polymerizable regions to free radicals generated by photosensitive chemicals and dyes. An advantage of these polymer hydrogels is that they can be polymerized rapidly in an aqueous surrounding. Precisely conforming, semi-permeable, biodegradable films or membranes can thus be formed on tissue in situ to serve as biodegradable barriers, as carriers for living cells or other biologically active materials, and as surgical adhesives for the eye.