841results about How to "Good hemostasis" patented technology

A bipolar electrosurgical instrument having a pair of relatively moveable jaws, each of which includes a tissue contacting surface. The tissue contacting surfaces of the jaws are in face-to-face relation with one another, and adjacent each of the tissue contacting surfaces are first and second spaced-apart electrodes that are adapted for connection to the opposite terminals of a bipolar RF generator so as to generator a current flow between the electrodes. The first and second electrodes of one jaw are in offset opposed relation, respectively, with the first and second electrodes of the other jaw. A cutting portion is provided between the jaws. The cutting portion is moveable to provide the instrument with a scissors-like capability or a grasper-like capability, depending on the position of the cutting portion. A tissue dam is included on at least one jaw to help contain tissue within the desired coagulation area, and thereby help contain current density between the electrodes, thereby decreasing lateral tissue thermal damage and increasing hemostasis.

An apparatus for providing hemostasis within a puncture through tissue includes an elongate member having a lumen extending between proximal and distal ends thereof, an expandable member carried on the distal end and a housing on the proximal end, the housing including an interior communicating with the lumen, and further including a valve assembly with a one-way valve allowing access into the housing interior upon application of a pressure differential across the valve, and a movable plunger for overriding and opening the valve.

Apparatus and methods are provided for sealing a puncture extending through tissue to a blood vessel. A delivery sheath is introduced-into the puncture, and a sealing compound, e.g., precursor polymers that mix to create a hydrogel, is introduced through the delivery sheath into the puncture. The delivery sheath is then removed, an introducer sheath is advanced through the puncture into the vessel, and instruments are introduced through the introducer sheath into the vessel to perform a medical procedure. After completing the procedure, the introducer sheath is withdrawn. The sealing compound may expand into the puncture and / or tissue recoil of the surrounding tissue may cause the sealing compound to at least partially occlude the puncture to facilitate sealing and / or hemostasis.

An implantable closure structure is delivered using minimally invasive techniques, and inhibits the migration of liquid and particulate matter from inside a physiological cavity or opening, such as an aneurysm or a septal defect, as well as inhibiting the flow of liquid and particulate matter, such as from an associated blood vessel or chamber, into the physiological cavity or opening. The device has a closure structure that covers the neck or opening of a cavity and has one or more anchoring structures for supporting and retaining the closure structure in place across the cavity or opening.

An apparatus for sealing a puncture extending through tissue to a blood vessel includes a guidewire including an expandable tamp, a retaining sheath for covering the tamp, and a delivery sheath including a primary lumen for receiving the guidewire therethrough and a secondary lumen for delivering sealing compound into the puncture. The guidewire is advanced into the puncture with the tamp in a contracted condition, the tamp is expanded within the vessel after retracting the retaining sheath, and the guidewire is retracted to seal the puncture from the vessel. The delivery sheath is advanced over the guidewire, and sealing compound is introduced into the puncture through the delivery sheath. After introducing the sealing compound, the delivery sheath is removed, and an introducer sheath is advanced over the guidewire to provide access to perform a medical procedure via the vessel after removing the guidewire.

Implantable devices for placement at a cavity or opening such as an aneurysm are disclosed. The implantable devices, in a deployed condition, have a generally inverted U-shaped profile with a curved or angled framework support structure sized and configured for placement in proximity to tissue surrounding the opening and anchoring legs extending proximally from the framework structure sized and configured to contact the wall of a neighboring lumen at opposed locations. Occlusive and semi-occlusive membranes may be associated with the framework support structure and deployed over the opening to provide exclusion of the opening and flow diversion. Proximal anchoring segments providing additional lumen wall surface area contact for the implantable device following deployment may be incorporated.

The present invention provides a device for closing an opening to a body cavity and methods of closing an opening to a body cavity. The device and methods can be used to easily and effectively close a vascular puncture site resulting from a surgical procedure, an atrial or ventricular septal defect, a malfunctioning heart valve, or the left atrium appendage.

A hemostatic device includes a flexible band adapted to be wrapped around a patient's limb at a site on the limb where bleeding is to be stopped, a portion for securing the band in a wrapped state to the limb, a curved plate which is made of a material more rigid than the band and at least a portion of which is curved toward the inner peripheral side thereof, a main balloon which is provided on the inner peripheral side of the curved plate and which inflates when a fluid is introduced therein, and a pressing member which is provided between the curved plate and the main balloon so that at least a portion thereof overlaps with the balloon and which is adapted for pressing against the balloon. The device provides an excellent hemostatic effect and prevents numbness and poor circulation in areas peripheral to the site of attachment.

The present invention provides a device for closing an opening to a body cavity and methods of closing an opening to a body cavity. The device and methods can be used to easily and effectively close a vascular puncture site resulting from a surgical procedure.

Compositions that include nanoscale structured materials or precursors thereof (e.g., self-assembling peptides) are described. The compositions can include other substances (e.g., a vasoconstrictor). Also described are methods for using the compositions to promote hemostasis, to protect the skin or wounds from contamination, to decontaminate a site upon removal of previously applied compositions that provided a protective coating, and to inhibit the movement of bodily substances other than blood. The compositions are also useful in isolating tissue, removing tissue, preserving tissue (for, e.g., subsequent transplantation or reattachment), and as bulking, stabilizing or hydrating agents. Medical devices that include the compositions (e.g., a stent or catheter), bandages or other wound dressings, sutures, and kits that include the compositions are also described.

Therapeutic formulations adapted for positive-pressure application for controlling biological fluid at a desired site in a subject, absorbent articles comprising therapeutic formulations, and anti-infective devices coated with therapeutic formulations, said formulations comprising about 25% to about 99% by weight liquid-crystal forming compound and 0% to about 75% by weight solvent. In addition, methods of using said formulations including methods for controlling biological fluid at a desired site in a subject, methods for controlling blood loss, and methods for facilitating effective closure of a vascular wound or incision site at a desired site in a subject are disclosed, the methods comprising administering particular formulations comprising liquid-crystal forming compounds and solvents that are described herein.

Devices and methods are disclosed for achieving hemostasis in traumatized patients. The devices utilize fluid impermeable outer surfaces and distributed pressure to achieve tamponade and hemostasis, primarily by exertion of pressure. The devices are capable of serving as carriers for throabogenic or antipathogenic agents. Peripheral haemostatic packing devices include optional adhesive hemostatic barriers to cover the entire wound area over the hemostatic pack. The hemostatic packing devices may be placed and removed by open surgery or laparoscopic access without generating excessive re-bleeding, and may further comprise antimicrobial or thrombogenic regions.

A system for delivering hemostasis promoting material of the present invention allows the hemostasis promoting material to be delivered to a blood vessel puncture site by fluid pressure. The system allows the hemostasis promoting material to be delivered through an producer sheath which is already in place within a tissue tract. The system includes a controlled tip which is insertable through the introducer sheath to locate and occlude the blood vessel puncture site and a hydration chamber for receiving and delivering the hemostasis promoting material to the blood vessel puncture site. The system accurately locates the blood vessel wall at a puncture site and for properly placing a hemostasis plug over the puncture site.

The present invention provides a hemostatic porous sponge comprising a matrix of a fibrous biomaterial and particles of a fluid absorbing, particulate material adhered to said matrix material, a method of producing these sponges and their use for wound healing.

A method of facilitating hemostasis of a blood vessel puncture. The method includes the steps of inserting a tubular device into a puncture in a blood vessel to establish access to the blood vessel, providing a vessel closure system around the tubular device, introducing a hemostatic material into a space between the tubular device and vessel closure system, and delivering the hemostatic material adjacent to the puncture to facilitate hemostasis of the puncture.

The invention relates to biocompatible modified starch sponge and use of the biocompatible modified starch sponge as a hemostatic material, an anti-adhesion material, a material for promoting tissue healing, a surgical sealant or a wound tissue adhesive. Modified starch is one or a combination of more than one among pre-gelatinized starch, acid modified starch, dextrin, oxidized starch, esterified starch, etherified starch, crosslinked starch, grafted starch and composite modified starch. The sponge is prepared by vacuum freeze drying of the modified starch and other biocompatible hemostatic material, coagulant, plasticizer and so on. The biocompatible modified starch sponge has the advantages that the biocompatible modified starch sponge has flexible form and good biocompatibility, can be directly acted on bloody wound surfaces, avoids the conditions of hypersusceptibility, infection and difficult healing of wounds caused by adoption of hemostatic materials such as animal source / human source collagens, obviously improves the water absorption speed, has larger viscosity, forms a zymoplastic mixture which has good adhesion, calks broken tissues and blood vessels, and is used for hemostasis of active hemorrhage.

The invention relates to a method for preparing composite biological medical material used to avoid adhering organisms, wherein said film is formed by two layers; the layer used as base material is formed by degradable composite macromolecule polylactic acid, glycolic acid, or their copolymer, treated by static spin technique, to make film fiber into nanometer level; then coats one layer of degradable natural macromolecule chitose or relative derivant on the base film, to be treated to obtain the degradable composite biological medical film; and the invention can add different amounts of medical elasticizer between two layers to adjust the degrade speed. The invention can improve immunity with haemostasis function, etc.

A system for delivering hemostasis promoting material of the present invention allows the hemostasis promoting material to be delivered to a blood vessel puncture site by fluid pressure. The system allows the hemostasis promoting material to be delivered through an introducer sheath which is already in place within a tissue tract. This system includes a controlled tip which is insertable through the introducer sheath to locate and occlude the blood vessel puncture site and a hydration chamber for receiving and delivering the hemostasis promoting material to the blood vessel puncture site. The system accurately locates the blood vessel wall at a puncture site and for properly placing a hemostasis plug over the puncture site.

A system for delivering hemostasis promoting material of the present invention allows the hemostasis promoting material to be delivered to a blood vessel puncture site by fluid pressure. The system allows the hemostasis promoting material to be delivered through an introducer sheath which is already in place within a tissue tract. This system includes a controlled tip which is insertable through the introducer sheath to locate and occlude the blood vessel puncture site and a hydration chamber for receiving and delivering the hemostasis promoting material to the blood vessel puncture site. The system accurately locates the blood vessel wall at a puncture site and for properly placing a hemostasis plug over the puncture site.

A compression anastomosis ring (CAR) assembly for use in joining severed organ wall portions of a hollow organ. The assembly comprises a first portion which includes an anvil ring and a second portion which comprises a bottom ring, at least one ring element, and at least one spring element formed of a shape-memory alloy. The at least one spring element provides a restorative force and is in compressive force contact with the bottom ring and the tissue to be joined is positioned between the anvil ring and the bottom ring. A plurality of needles on one of the ring elements is operative, upon application of a closure force, to pierce the tissue and the anvil ring, holding the disk to the second portion of the CAR assembly. An applicator for applying the CAR assembly and a method for using the assembly and applicator are taught.

A dressing having a flexible sleeve shaped to accommodate a substantially cylindrical body portion, the sleeve having a lining which is substantially non-adherent to the body part being bandaged and having a peripheral securement means which attaches two peripheral portions to each other without those portions being circumferentially adhered to the sleeve portion.

The present invention provides methods and compositions for treating bleeding episodes. The methods are carried out by administering to a patient in need thereof a preparation comprising a factor XI polypeptide, in an amount effective for such treatment. The methods of the invention result in one or more of: reduced clotting time; enhancement of hemostasis; increase in clot lysis time; increase in clot strength; and / or increase in overall clot quality (OCQ) in said patient.

The invention discloses a tissue hemostasis clamping device, comprising a clamp, a releasing mechanism, a drawing assembly, a handle assembly and an external sheathing canal, wherein the clamp comprises a clamping plate and a connector integrally fixed with a pull-push end of the clamping plate; the pull-push end of the clamping plate and the connector can slide back and forth in a tightening pipe, the connector is buckled with the tightening pipe by a loose-preventing mechanism; the front part of the tightening pipe is provided with a stopper; a clamping arm of the clamping plate is provided with a closing stop; the releasing mechanism comprises a pull-push pipe, wherein the front part of the pull-push pipe is connected with the connector in a manner of connection failure when the front part of the pull-push pipe bears the stress exceeding a predetermined tensile force, while the rear part of the pull-push pipe is fixedly connected with a drawing steel wire; the front part of the connection pipe is connected with the rear part of the tightening pipe by a slipknot, and the rear part of the connecting pipe is fixedly connected with a sheathing tube; and the slipknot connection of the connection pipe and the tightening pipe is relieved by a pull-push pipe through the releasing mechanism. With the adoption of the technical scheme, the device has advantages of simple and reasonable structure, stable and reliable clamping, possible repeated pre-clamping, small volume of the clamp and smooth appearance.

The invention provides a preparation method of high-purity collagen protein sponge, and relates to a preparation method of collagen protein sponge. The preparation method of the high-purity collagen protein sponge is used for solving the problems that the collagen protein sponge prepared by using a conventional method is long in production cycle and low in yield and purity and has poor hemostasis performance. The preparation method of the high-purity collagen protein sponge comprises the following steps: step one. pretreating fresh bovine heel tendons; step two. extracting collagen protein; step three. centrifuging; step four. salting out; step five. dissolving; step six. carrying out gradient dialysis; step seven. pre-freezing; step eight. carrying out freeze drying; and step nine. sterilizing. The final product prepared by using the method has a smooth and flat surface and relatively good hemostatic performance and is uniform in pore size distribution. The product has relatively high purity (the total amount of amino acids reaches 97.73%), an obvious hemostatic effect and no abnormal taste, is safe, non-toxic, high in yield and short in time; liquid is clear without impurities; the production cycle is shortened; the whole preparation process is carried out at a room temperature; the biological activity of the collagen protein is maintained; and the application of the high-purity collagen protein sponge in clinical is improved.