摘要:
Implants or systems of implants and methods apply a selected force vector or a selected combination of force vectors within or across the left atrium, which allow mitral valve leaflets to better coapt . The implants or systems of implants and methods make possible rapid deployment, facile endovascular delivery, and full intra - atrial adjustability and retrievability years after implant . The implants or systems of implants and methods also make use of strong fluoroscopic landmarks. The implants or systems of implants and methods make use of an adjustable implant and a fixed length implant. The implants or systems of implants and methods may also utilize an adjustable bridge stop to secure the implant, and the methods of implantation employ various tools.
摘要:
Methods and apparatus for crossing totally to substantially occluded blood vessels by passing a redirectable wire such as a guidewire from a relatively proximal point past the occlusion within a subintimal space formed between the intimal layer and the adventitial layer of a blood vessel wall. The wire may be advanced to a point distal to the occlusion, and thereafter deflected back into the blood vesel lumen, typically using a deflecting catheter which is advanced over the guidewire after it has been positioned within the subintimal space. The deflecting catheter may include a flapper valve assembly or preformed actuator wire for redirecting the guidewire. After the guidewire is returned to the blood vessel lumen, the deflecting catheter may be withdrawn, and the guidewire may be available for introduction of other inverventional and diagnostic catheters for performing procedures such as stenting.
摘要:
Embolectomy catheters (10, 10', 10'', 10''', 10''''), rapid exchange microcatheters, systems and methods for removing clots or other obstructive material (e.g., thrombus, thromboemboli, embolic fragments of atherosclerotic plaque, foreign objects, etc.) from blood vessels. This invention is particularly useable for percuatneous removal of thromboemboli or other obstructive matter from small blood vessels of the brain, during an evolving stroke or period of cerebral ischemia. In some embodiments, the embolectomy catheters (10, 10', 10'', 10''', 10'''') of this invention are advanceable with or over a guidewire (GW) which has been pre-inserted through or around the clot. Also, in some embodiments, the embolectomy catheters include clot removal devices which are deployable from the catheter after the catheter has been advanced at least partially through the clot. The clot removal device may include a deployable wire nest (14) that is designed to prevent a blood clot from passing therethrough. The delivery catheter may include telescoping inner and outer tubes, with the clot removal device being radially constrained by the outer tube. Retraction of the outer tube removes the constraint on the clot removal device and permits it to expand to its deployed configuration. An infusion guidewire is particularly useful in conjunction with the embolectomy catheter, and permits infusion of medicants or visualization fluids distal to the clot.
摘要:
An anastomotic connector (60) for attaching two blood vessels, comprising a cylinder-like portion having a lumen, two ends, and an array of cells elements, and a tissue engaging portion (60) comprising at least one set of spikes (64) wherein at least one spike arranged adjacent one of the two ends of said cylinder-like portion. The connector (60) may comprise at least a second set of spikes (66) adjacent the other of the two ends.
摘要:
A method for placing various types of catheters into the pericardial space takes advantage of the fact that the right auricle is a thin walled, low-pressure structure which can be readily penetrated without damaging the pericardium or the epicardium. A guide catheter (401) is passed through a selected peripheral vein to establish a trans-venous route to the right auricle of the heart. A needle catheter (401) is then passe through guide catheter and into the right auricle so that a distal end of the needle catheter (402) is positioned against a wall of the right auricle. The wall of the right auricle is than pierced with the needle catheter (402). A guide wire (403) is advanced through the needle catheter and into the pericardial space. Once in position the guide wire (403) can be used as a conduit over which a desired catheter may be introduced for performing a specific medical procedure.
摘要:
The present invention is a device and a method for boring a perfusion channel into the myocardial tissue of a patient. Structurally, the present invention includes a positioning catheter and a cutting catheter. The positioning catheter is formed with an inflation lumen and a deployment lumen and has an inflatable balloon mounted at its distal end. The cutting catheter has a sharpened distal end and is advanceable through the deployment lumen of the positioning catheter. Advancement of the cutting catheter through the deployment lumen causes the distal end of the cutting catheter to be directed radially outward from the positioning catheter. In use, the positioning catheter is positioned within a target vessel. The inflatable balloon is then expanded to anchor the distal end of the positioning catheter. The cutting catheter is then advanced through the deployment lumen, projecting the distal end of the cutting catheter radially outward from the positioning catheter, boring a perfusion channel in the tissue adjacent to the target vessel.
摘要:
The catheter system is designed for penetration of tight stenoses or total occlusions (called blockages) as a precursor to balloon angioplasty, atherectomy, or any other vessel opening means that requires an initial passageway, and comprises a catheter (20) carrying at its distal end a pointed tool, e.g. an auger (30) that may be used to open up plastic deformation of the plaque rather than by excision.
摘要:
A guidewire and guidewire assembly (10) for placement within a blood vessel for penetrating an occlusion therein. The guidewire comprises a length of flexible wire (12) having a concentric lumen (14) running its entire length and a distal end portion (20) having an arcuate tip (22) and a diameter greater than that of the wire immediately proximal thereto. The guidewire assembly comprises the guidewire described along with a flexible stylet (32) substantially the same length as the flexible wire and disposed within the lumen of the wire. In operation, the distal end portion is positioned in the blood vessel against an occlusion, and a dottering action is thereafter provided whereby the distal end portion repeatedly impinges on the occlusion until penetration of the occlusion occurs.
摘要:
Un fil de guidage (10) destiné à pénétrer dans une occlusion (62) se trouvant à l'intérieur d'un conduit ou d'un vaisseau, tel qu'un vaisseau sanguin, présente un corps de fil de guidage principal allongé (20) d'un premier diamètre réduit. Le fil de guidage se termine, en son extrémité distale, par une partie extrême souple élargie (24) présentant une surface extérieure lisse (22) et il est formé et construit pour pénétrer l'occlusion. Le corps du fil de guidage est construit pour être relativement souple dasn l'extrémité distale corrspondant au bout élargi, et relativement plus rigide dans ses parties proximales afin de permettre la manipulation du fil à partir de son extrémité proximale et afin de permettre à ladite partie extrême distale de pénétrer l'occlusion ainsi que d'y former un passage. Dans un mode de réalisation, un manchon extérieur (100, 206) glisse sur le corps principal, et venant en aboutement contre l'extrémité proximale de la partie extrême élargie il contribue à la rigidité axiale de la combinaison afin de permettre une manipulation à travers l'occlusion. Après la mise en place on retire ce manchon et l'on glisse un cathéter de dilatation (50) sur le corps principal, ledit cathéter pénétrant l'occlusion derrière la partie extrême élargie.