448 results about "Anastomosis" patented technology

A combination medical device comprising a circular stapler instrument (4) and one or more portions of preformed buttress material (16) adapted to be stably positioned upon the staple cartridge (12) and/or anvil (14) components of the stapler (4) prior or at the time of use. Positioned buttress material(s) (16) are delivered to a tissue site where the circular stapler (4) is actuated to connect previously severed tissue portions. An embodiment of the invention allows tissue portions to be joined without the use of sutures. The buttress material (16) is made up of two regions, one of which serves primarily to secure the buttress material (16) to the stapler (4) prior to acuation, and one of which serves primarily to form the improved seal. The former region is severed and discarded upon activation of the circular stapler (4) to form anastomoses, while the remaining material secures and seals the newly connected tissue. Methods of use and preparation of the buttress material (16) are also described.

Methods and devices for forming an anastomosis during a bypass procedure utilize a graft vessel secured to a vessel coupling adapted to be fixed to a target vessel without using suture. The graft vessel is placed in fluid communication with a heart chamber containing blood. The vessel coupling may be collapsed for introduction into the target vessel and then expanded to fix the coupling thereto. The vessel coupling may be a stent with the graft vessel secured thereto to form a stent-graft assembly. The anastomosis is carried out to place the graft and target vessels in fluid communication while preserving native proximal flow through the target vessel, which may be a coronary artery. As a result, blood flowing from the aorta and past an obstruction in the coronary artery is not blocked by formation of the anastomosis; rather, such proximal blood flow is free to move past the vessel coupling and the anastomosis.

The invention provides a composite repair material which facilitates surgical operation and realizes quick defect nerve bridging and composition, preparation and application of a stent made of the composite repair material. The composite repair material consists of a fibroin layer, a collagen layer and a high-molecular polymer layer which are sequentially arranged, and during application, the composite repair material is folded or wound to form the nerve bridging stent taking the fibroin layer as the inner layer, the collagen layer as the middle layer and the high-molecular polymer as the outer layer. The composite repair material and the stent made of the composite repair material adopt the layered arrangement and a specific three-dimensional design to bring the advantages of various repair materials into full play, and meanwhile, make up for the deficiencies of the various repair materials. During surgical operation, only suturing or bonding anastomosis of epineurium is required but not suturing of perineurium, so that the operation time of a defect nerve bridging operation is greatly shortened, the operation technical difficulty is lowered, and the security is improved.

An external stent type prosthesis is provided that is extraluminal, with at least one tubular member, interconnectable in an upper end, and inflatable by a balloon with a central lumen, single but with multiple projections in equal plurality of tubular members of the stent which is adjusted in its interior, for side-to-side, end-to-end, end-to-side anastomosis without clamping and sutureless, or with expeditious clamping and sutureless, where the vascular graft, or anastomotic trunk, or any other grafts, inserted in the lumen of the balloon and prosthesis, comprising a distensible mesh and after being coated with graft, this mesh is expansible by the balloon until the necessary gauge to keep the graft wall joined together and sealed in relation to the organ wall, that can contain a bag suture around the place where the anastomosis is made.

Apparatus and methods are provided for forming a working space on the interior wall of a blood vessel, such as the aorta. The working space is isolated from blood flow and permits creation of an anastomotic hole and subsequent suturing of the hole to form an end-to-side anastomosis, even while the heart is beating. The apparatus comprises tools including inflatable barriers, such as cup-shaped balloons, which engage the inner wall of the blood vessel with minimum trauma and maximum sealing. In a first embodiment, the inflatable barrier is introduced through a penetration at the site of the anastomotic attachment. In a second embodiment, the inflatable barrier is introduced through a second penetration axially spaced-apart from the site of the anastomotic attachment.

Vascular access systems for performing hemodialysis are disclosed. Some embodiments relate to vascular access grafts (250) comprising an instant access or self-sealing material (254) reinforced with expanded PTFE (252) to resist stretching of the instant access material (254) and thereby resist leakage associated with stretching or bending. The graft may comprise two end segments (260, 262) comprising ePTFE (252) without the instant access material (254) to allow easier anastomosis of the graft (250) to veins and arteries. The graft (250) may have a unibody design or have modular components that may be joined together to create a graft with customized length or other features. One or more sections of the graft (296) may also be cut or trimmed to a custom length.

The invention discloses an attentiveness training and evaluation device based on force tactile-sensation feedback and electroencephalic signal analysis. The device includes a force tactile-sensation training unit, an electroencephalic recording unit and a control unit. The force tactile-sensation training unit is used to send finger touch force data of a trainee to the control unit. The electroencephalic recording unit is used to send electroencephalic signals of the trainee in a training process to the control unit. The control unit includes a training module, an evaluation module and a control module. The training module is used to store training modes. The evaluation module evaluates data fed back by the force tactile-sensation training unit and the electroencephalic recording unit. Thecontrol module adaptively adjusts training difficulty according to an evaluation result. A physiological index and a behavioral index which characterize an attentiveness level are obtained at the same time, the attentiveness level of the subject can be improved in a short term, an anastomosis degree between the obtained physiological index and behavioral index is very high, and the attentivenesslevel of the trainee can be reliably analyzed and evaluated.

Systems and methods for performing transcatheter coronary artery bypass grafting procedures are provided. The methods generally involve passing the graft from the aorta to the coronary artery through the pericardial space. The systems include poke-out wires, a coring device, and devices for forming anastomoses at the proximal and distal ends of a vascular graft.

The invention discloses a hydrogel containing a heparin-poloxamer compound for anastomosis of blood vessel and a preparation method thereof. The concentration of the heparin-poloxamer compound in the hydrogel is 10-40% (W/V). The hydrogel is pre-sealed in a sterile injector or ampoule, or the hydrogel is freeze-dried into freeze-dried powder and poured into a penicillin bottle, and before use, the freeze-dried powder is dissolved in injection water to form hydrogel. The hydrogel containing the heparin-poloxamer compound disclosed by the invention is applied to the micro-anastomosis of blood vessel in combination with a medical adhesive, the assistance of soluble endovascular stent or suture is not needed, the closeness of the anastomotic stoma is enhanced, the phenomenon of leakage is avoided, and the risk of trauma and thrombosis during the anastomosis of blood vessel is reduced.

The invention belongs to the technical field of a surgery part infection risk predicating scoring and a system based on independent danger factors. Particularly the invention relates to a risk predicting evaluation scoring method for neck anastomosis esophagus cancer resection surgery part infection and a system thereof. According to the independent danger factors which are firstly screened, an infection predicting model is established. According to an assignment score which is generated by a formula, the influence of the danger factors to a final result-surgery part infection can be more visually presented, thereby facilitating clinical early prediction and evaluation to possibility of surgery part infection after the surgery. Individualized infection risk evaluation supplies a basis forkey disposition of an infection preventing measure. The content of the invention is not reported in China and other countries. Through data statistics analysis, the independent predicting factors forneck anastomosis esophagus cancer resection surgery part infection are screened. A mathematical model is used for establishing the predicting scoring system for the surgery infection risks, thereby laying a certain basis for individually predicting the surgery part infection, and supplying guidance for clinical early intervention measure application.

Methods and apparatus for safely forming anastomoses comprise magnetic members configured to accommodate different tissue types and patients of differing size and weight. The magnetic members may comprise first and second magnetic members configured to engage each other with a force sufficient to form anastomosis while taking a sufficiently long time to allow the intestinal walls to fuse together. The first and second magnetic members can be configured to form anastomoses between both similar and different types of intestinal tissue. An elongate surgical placement instrument can be configured to engage and manipulate the first and second magnet members through the intestinal wall from outside the intestinal wall in order to place each of the magnetic members at desired locations.

A device for assisting in anastomosis of tubular structures. The basic device has a generally cylindrical shape with a pair of insertion arms and a central depression that provides a space for the needle to move through within the tubular structures while simultaneously providing support so that the suture needle thrust does not collapse the tubular structure wall. The depression may be configured to guide the path of the needle. A bridge connects the arms and prevents the needle from inadvertently coming in contact with the wall opposite that of the wall being sutured. The method includes an initial suture to join the sutures, inserting the device into the openings of the two structures, placing sutures in the walls adjacent to the depression, optionally rotating the device so the depression is aligned with each suture as it is being placed, removing the device, and tightening the sutures to complete the anastomosis.

The present invention relates to circular anastomosis stapler kits that deliver a therapeutic agent followed by stapling of tissue. Each device has a stapling head with a shaft extending from said stapling head and a removable anvil and an interchangeable delivery head for delivering a therapeutic agent into the tissue. The present invention also relates to methods for using the kits and devices therein.