摘要:
An intraluminal device implantable in a blood vessel having an aneurysm therein in the vicinity of a perforating vessel and/or of a bifurcation leading to a branch vessel. The intraluminal device includes a mesh-like tube of bio-compatible material having an expanded condition in which the tube diameter is slightly larger than the diameter of the blood vessel in which it is to be implanted, and the tube length is sufficient to straddle the aneurysm and to be anchored to the blood vessel on the opposite sides of the aneurysm. The mesh-like tube also has a contracted condition wherein it is sufficiently flexible so as to be easily manipulatable through the blood vessel to straddle the aneurysm. In its expanded condition, the mesh-like tube has a porosity index of 55% - 80% such as to reduce the flow of blood through its wall to the aneurysm sufficiently to decrease the possibility of rupture of the aneurysm but not to unduly reduce the blood flow to a perforating or branch vessel to the degree likely to cause significant damage to tissues supplied with blood by such perforating or branch vessel.
摘要:
The present invention relates to an ultra-fine fibrous collagen obtainable by freezing a1N hydrochloric acid solution of collagen at about -10 to -196°C for at least about 6 hours followed by freeze-drying the frozen collagen solution in a vacuum.
摘要:
A donor heart valve sizer and method of sizing to increase the quality and yield of, and decrease the expense of fabricating, prosthetic heart valves. The sizer includes an axially-extending sizing portion size to fit within the lumen of a donor heart valve. The sizing portion may be conical such that a resistance to further insertion is felt when the exterior of the sizing portion contacts the annulus of the valve. A measuring bracket attached to the sizing portion includes a scale aligned with the sizing portion that indicates the final expected valve size based on the position of the fresh donor valve on the sizing portion. The measuring bracket includes regions of acceptable valve sizes, and may also include regions of unacceptable valve sizes. A method of sizing includes utilizing the sizer in the slaughterhouse to reduce the overall number of valves shipped the valve assembly facility to obtain a particular valve size. The sizer and method are particular useful for sizing xenograft valves, especially porcine aortic valves. The sizing portion may be made of polytetrafluoroethylene, and have an included taper of approximately 4°.
摘要:
An intraluminal device implantable in a blood vessel having an aneurysm therein in the vicinity of a perforating vessel and/or of a bifurcation leading to a branch vessel. The intraluminal device includes a mesh-like tube of bio-compatible material having an expanded condition in which the tube diameter is slightly larger than the diameter of the blood vessel in which it is to be implanted, and the tube length is sufficient to straddle the aneurysm and to be anchored to the blood vessel on the opposite sides of the aneurysm. The mesh-like tube also has a contracted condition wherein it is sufficiently flexible so as to be easily manipulatable through the blood vessel to straddle the aneurysm. In its expanded condition, the mesh-like tube has a porosity index of 55% - 80% such as to reduce the flow of blood through its wall to the aneurysm sufficiently to decrease the possibility of rupture of the aneurysm but not to unduly reduce the blood flow to a perforating or branch vessel to the degree likely to cause significant damage to tissues supplied with blood by such perforating or branch vessel.
摘要:
A first catheter (30) has a return bend formed near its distal free end and a first magnet (32) mounted on the distal free end. The first catheter (17) is introduced through a sheath in a first common femoral artery (16) into an elongate leg of a stent graft and pulled back until the return bend positions the first magnet near a truncate leg of the stent graft. A second catheter (36) having a second magnet (38) on its distal free end is introduced through a second common femoral artery (18) and positioned near the first magnet (32) so that the magnets become interconnected. The second catheter (18) is pulled into the stent graft, a guide wire is inserted through it, and a second sheath is introduced into the stent graft. A contralateral limb is deployed through the second sheath and the second sheath is removed. In another embodiment, catheters with magnets pull a nephroureteral stent from a kidney.
摘要:
The invention concerns a method for manufacturing a prosthetic ligament for replacing a natural articular ligament, comprising between two end parts (2, 2') a median part (3) formed only by a skein of active yarn (4, 11, 12) advantageously in polyester, monofilament or multifilament with a yarn count not less than 100 decitex, longitudinal, adjacent and not transversely linked between them characterised in that previous to the mounting of the ligament (1) a longitudinal twist is given to each active yarn, clockwise or anti-clockwise, for forming a prosthetic ligament (1) for right articulation and left articulation respectively, the ends of said yarn (4, 11, 12) being maintained together by all appropriate means over a sufficient width for constituting the end parts (2, 2') of said prosthetic ligament (1). The invention also concerns the left articulating or right articulating ligament thus obtained.
摘要:
Method and device for manufacturing of expandable cylindrical metal meshes (100) for use in expandable stents and in particular for customized manufacturing. The method includes determining the type and size of the stent to be implanted, electrochemically forming the stent with desired pattern of meshes and implanting the stent into patient. The method comprises using a cathode (150) with desired pattern of meshes and a tubular blank (250), from which the stent is formed. Between the cathode and the blank is delivered an electrolyte and the cathode and the blank are simultaneously rotated during electrochemical forming process.