Abstract: A device for medical, use and particularly a filter intended to be placed in a vessel, provided with flat branches, called fixing branches, which cut off the blood flow when the device is placed in the vessel. The extremities of the fixing branches are locked inside of at least one ogival head by means of a locking art and the shape of said extremities is adapted to the internal and external peripheries, respectively of the ogival head and of the locking part. According to a first embodiment, the locking part and the ogival head being cylindrical parts, each fixing branch has a slightly curved extremity so as to adapt itself to the internal periphery of the ogival head and to the external periphery of the locking part. According to a second embodiment, the internal and external peripheries, respectively of the ogival head and of the locking part form regular polygons of which the number of sides is equal to the number of fixing branches of the filter, and of which the sides are parallel by pairs.

Abstract: The invention relates to a filter catheter. This catheter comprises a tube-like basic body with a proximal and a distal end, a filter element arranged at the distal end formed by a number of strips arranged spaced out around the circumference, which are connected with both ends to the basic body. The relatively distal ends of the strips are connected in a detachable manner to the basic body by connecting member.

Abstract: A medical kit comprises: a) a filter consisting of elastic lugs deployed substantially in the form of a conical corolla emerging rearwardly from a distal head, and having a small orifice of diameter D1 at its end; b) a metal guide of outside diameter D2; c) a push rod consisting of a hollow tube having an internal opening of diameter D3; d) an insertion tube fitted at its distal end with a rigid cylindrical cap of inside diameter D4, and having an internal annular shoulder towards its proximate end capable of serving as a stop for the ends of the filter tabs. The respective dimensions of the various elements are such that D4>D3>D1>D2.

Abstract: This invention relates to a filter for the partial and at least temporary interruption of a vein, comprising a tube made of polytetrafluoroethylene presenting towards its distal end longitudinal notches distributed symmetrically over its periphery and defining flexible bands, and a conduit made of polytetrafluoroethylene inside the tube; the conduit and the tube are joined for example by thermo-welding by their distal ends. A ring made of a radio-opaque material is preferably included between the distal ends during thermo-welding. The flexible bands open out transversely by the conduit sliding in the tube. They have undergone a treatment of thermo-setting, memorizing in the polymeric structure of the tetrafluoroethylene the opened out form and/or a helical form.

Abstract: The atherectomy or thrombectomy device according to the invention comprises a rotary member composed of flexible filiform elements, which are joined by their two ends, the distal end and the proximal end; it contains no mechanical means for bringing said ends closer and the speed of rotation of the rotary member is sufficient, notably higher than 30,000 rays/min. to achieve the transversal expansion of the filiform elements under the effect of the centrifugal force.Preferably, the rotary member is constituted by a conduit, such as a conduit in polytetrafluoroethylene provided with one or two sets of longitudinal slits symmetricaly distributed over its periphery and defining flexible strips.

Abstract: This invention relates to a device adapted to be implanted in a vessel, for example a filter for retaining blood clots in a vein, which comprises lateral legs abutting on the wall of the vessel. According to the invention, each leg, whose end is not sharp, is provided with at least two teeth with antagonistic inclination. They are preferably placed towards the rounded end of the leg and have divergent directions. The tooth is for example obtained by cutting out and pushing a median part of the leg, and possibly by subsequent bending thereof. The angle made by the end part of the tooth with respect to the plane of the leg is included between 0 and 30.degree.; the tip of the tooth is at a distance of between 0.8 and 2 mm from the leg.

Abstract: A medical filter and catheter for positioning and using the filter, which filter is particularly intended to be implanted in a blood vessel such as the inferior vena cava through the endovenous route via a catheter. The filter has a filtering section which opens out inthe vessel when it is in position in the patient and which has no hooks for engaging the vessel wall. The filter has a holding section which holds the filter section in position in the vessel and which facilitates transition from a temporary use of the filter to definitive use.