摘要:
An implantable pulse generator particularly adapted for implantation in the abdomen. The pulse generator displays a generally flattened configuration having two generally opposed major surfaces and a smaller, circumferential edge surface, and includes a plurality of electrical connectors located in a connector module mounted to one of the major surfaces of the pulse generator. The housing of the pulse generator contains a hybrid circuit mounted generally parallel to the major surfaces of the pulse generator, connected to the electrical connectors by means of feedthroughs passing through one of the major surfaces of the pulse generator, located adjacent to the edges of the hybrid circuit and perpendicular thereto.
摘要:
Disclosed is a method for producing a hemocompatible article. A non-thermally stabilized polytetrafluoroethylene membrane comprised of non-oriented fibers is heated to a temperature of around 400° C. and above the gel point of the polytetrafluoroethylene, while the membrane is being applied against a forming mold. The membrane is applied against the forming mold by generating a pressure differential between opposing faces of the membrane to form a conformed membrane. The conformed membrane is then cooled, thereby producing the hemocompatible article.
摘要:
Implantable one-piece heart prosthesis. According to the invention, the prosthesis comprises a main hydraulic actuator (13t) arranged between the artificial ventricles (2 and 8) and designed to actuate, with desired flow rates, one (8) of said artificial ventricles, and also an auxiliary hydraulic actuator (7t) designed to correct the diastolic and systolic flow rates of the other (2) of said ventricles.
摘要:
One-piece heart prosthesis implantable in an anatomical position. According to the invention, the artificial left and right ventricles (2,8) have general directions (14, 15) arranged in an asymmetrical V shape, such that said ventricles approach each other as they move away from the means (6, 12) of connection to the natural left and right auricles, and the individual hydraulic actuators (7, 13), associated respectively with said artificial left and light ventricles (2, 8), are arranged near each other, in proximity to said artificial left ventricle (2).
摘要:
A set of annuloplasty rings progressively sized to take into account more of the common pathologies. The proportional shapes of each ring as the orifice size changes vary. For instance, the larger rings have larger minor axis dimensions relative to their major axis dimensions.
摘要:
A method for fixation of biological tissues, and bioprosthetic devices prepared by such method. The method generally comprises the steps of A) fixing the tissue, B) treating the tissue with a mixture of i) a denaturant, ii) a surfactant and iii) a crosslinking agent, C) fabricating or forming the bioprosthesis (e.g., forming the tissue and attaching any non-biological components thereto) and D) subjecting the bioprosthesis to terminal sterilization.
摘要:
The invention is an apparatus and method to perform a surgical procedure within the beating heart. The instrument provides a seal to surround cardiac tissue, thereby defining a segregated surgical field within the body of the instrument. A suction device is preferred to remove blood and fluids from the surgical field so that a surgical procedure can be performed while the heart continues to beat. The instrument is particularly suitable for a procedure to repair defective or diseased cardiac valves, such as the mitral valve; a procedure which previously required that the heart be stopped so that the corrective surgical procedure could be performed.
摘要:
An activating system is provided for a heart valve having a seat (1) and at least one pivoting flap (2a, 2b) mounted on the seat (1). The activating system includes at least one mobile magnetic element (4) connected with said flap (2a, 2b) and at least one fixed magnetic element (3) on the seat (1), with the magnetic elements (3, 4) producing interacting fields that create a force which is exerted on said flap (2a, 2b) during its opening and/or closing movements.
摘要:
Calcification resistant bioprosthetic implants are made from tanned biological materials, such as porcine heart valves, bovine pericardium, human dura mater or the like, which has been impregnated with a calcification-mitigating effective amount of a ferric and/or stannic salt. The impregnated biological materials and processes are particularly advantageous for the preparation of bioprosthetic heart valves. These implants have been found to be highly resistant to calcification in vivo.
摘要:
Disclosed is a composite hemocompatible material and a method for producing a composite hemocompatible material. The composite material includes a synthetic substrate and an animal biological tissue. The animal biological tissue is interlinked the synthetic substrate so as to bond the animal biological tissue to the synthetic substrate and form the composite hemocompatible material.