摘要:
A medical device delivery apparatus has an inner tube with a medical device receiving region at the distal end, a balloon assembly movably disposed about the inner tube and a medical balloon displaceable from the medical device receiving region. A retractable outer sheath is diposed about the inner tube and is movable relative to the inner tube to expose the medical device receiving region. An inflation lumen capable of fluid communication with the medical balloon extends proximally from the balloon. Disposed about the distal portion of the inner tube is an expandable medical device that is distal to the medical balloon. The balloon may be moved within the medical device to expand the medical device.
摘要:
This invention is a method and device for quickly removing thrombus from the vascular system, particularly from a saphenous vein graft which can have highly organized thrombus over its entire length. Thrombus is pulled into a chamber at the distal end of the thrombus extraction device as a result of negative pressure, a severing mechanism severs the portion of the thrombus that is in the chamber, and fluid under pressure is supplied to transport and dilute the blood and thrombus, which renders the thrombus more manageable and reduces the blood loss to the patient.
摘要:
A covered stent comprises a coiled sheet stent having at least a portion with open cell geometry and a graft material covering at least a portion of the coiled sheet stent.
摘要:
A covered stent comprises a coiled sheet stent having at least a portion with open cell geometry and a graft material covering at least a portion of the coiled sheet stent.
摘要:
A high performance guide wire with a pressure sensor for measuring blood pressure, may utilize a single electrical lead connected to the guide wire. An integrated circuit, powered by the single electrical connection on the guide wire, may interface with the pressure sensor, and may convert pressure information to an encoded signal. The encoded signal may be detectable in the electrical circuit, and can be used to display a pressure waveform as detected by the pressure sensor. For example, when utilized for percutaneous coronary interventions, such a guide wire can provide high quality blood pressure measurements (e.g., for fractional flow reserve), while also possessing excellent steerability and handling characteristics for navigating tortuous anatomy.
摘要:
A drug eluting stent comprising a multilayer tubular structure which includes at least one intermediate layer having reservoirs therein for deposition of a drug, the intermediate layer eluting drug in a lateral direction, and methods of making the same.
摘要:
A method for substituting at least one high quality position measurement of an object taken before an interrupting event with a set of upgraded low quality position measurements of the object provided by the same source of measurements after the interrupting event. The method comprises the following steps: (A) obtaining at least one high quality position measurement of the object provided by a source of measurements before the interrupting event; (B) saving at least one high quality position measurement of the object; (C) if at least one position measurement of the object provided by source of measurements after the interrupting event is of substantially high quality, using at least one position measurement of substantially high quality of the object for navigation purposes of the object; and (D) if each position measurement of the object provided by the source of measurements after the interrupting event is of low quality, and if there is not at least one restoration event; then upgrading at least one position measurement of the object by using an upgrade algorithm.
摘要:
Various configurations of systems that employ leadless electrodes to provide pacing therapy are provided. In one example, a system that provides multiple sites for pacing of myocardium of a heart includes wireless pacing electrodes that are implantable at sites proximate the myocardium using a percutaneous, transluminal, catheter delivery system. Each of the electrodes contains a source of electrical energy for pacing the myocardium and is adapted to receive electromagnetic energy from a source outside the myocardium. The system also includes a source adapted for placement outside the myocardium and that uses locally measured electrocardiograms to synchronize pacing of the heart by sending electromagnetic commands to the electrodes to pace the myocardium surrounding the electrodes. Also disclosed is various configurations of such systems, wireless electrode assemblies, and delivery catheters for delivering and implanting the electrode assemblies.
摘要:
The present invention relates to an elongate intravascular device adapted to be advanced through a vessel of a subject. The present invention further includes an antenna which is disposed on an inflatable member such that the antenna can be increased or decreased in size to more accurately tune the system in which it is employed.