Abstract: A removable filter has a hub defining a waist and a longitudinal filter axis; a plurality of primary struts extending from a first axial side of the hub, and a plurality of secondary struts extending from a second axial side of the hub opposite the first axial side. The secondary struts form a radially outward arc extending from the hub over an angle of at least about 180° in the expanded state, preferably between about 190° and about 270°. A retrieval coil with a proximal end fastened to an elongated wire has several longitudinally offset windings. The retrieval coil is preferably more rigid than the primary struts. The coil may preferably have a distal winding with an inner diameter that is greater than the diameter of the hub and smaller than the diameter of the filter in the expanded state.

Abstract: A removable filter has a hub defining a waist and a longitudinal filter axis; a plurality of primary struts extending from a first axial side of the hub, and a plurality of secondary struts extending from a second axial side of the hub opposite the first axial side. The secondary struts form a radially outward arc extending from the hub over an angle of at least about 180° in the expanded state, preferably between about 190° and about 270°. A retrieval coil with a proximal end fastened to an elongated wire has several longitudinally offset windings. The retrieval coil is preferably more rigid than the primary struts. The coil may preferably have a distal winding with an inner diameter that is greater than the diameter of the hub and smaller than the diameter of the filter in the expanded state.

Abstract: A vascular occluder includes a frame (10) having a generally cylindrical body portion (12), first and second end conical portions (14, 16) and first and second extremities (18, 20). Located within the fame (10) is a fibrous barrier (28) which provides rapid occlusion. The extremities (18, 20) are coupled by a coil spring (22) which acts to pull the extremities (18, 22) towards one another and thereby to cause longitudinal contraction an consequential radial expansion of the frame (10). The coil spring (22) ensures rapid and reliable deployment of the occluder in a patient's vessel. The occluder also can be compressed to a narrow diameter for deployment by means of narrow diameter sheaths.