摘要:
The present invention provides a method and apparatus for assessing ventricular function on a chronic basis using a plurality of electrodes disposed on or about a left ventricle and/or a right ventricle—and optionally, at least one mechanical or metabolic sensor—all operatively electrically coupled to an implantable medical device. The plurality of electrodes are preferably spaced-apart so that at least one electrode is disposed electrical communication with a discrete volume of ventricular tissue. In one embodiment, the discrete volume of tissue is defined by multiple longitudinal and axial planes as known and used in the medical arts. Thus, according to the present invention, at least one electrode couples to appropriate sensing circuitry and essentially provides a localized electrogram (EGM) that, when compared to other EGMs, provides for configurable, localized delivery of therapeutic pacing stimulus, diverse impedance-sensing vectors, various diagnostic information regarding myocardial function and/or anti-tachycardia pacing.
摘要:
An improved medical lead assembly and method of use is provided. The lead assembly includes a lead body, and a spring member positioned adjacent to the lead body. The spring member may be deployed a selectable amount to maintain the lead body in a fixed location within a patient's body. The spring member may be an expandable coil, a mesh structure that is similar to a stent, or any other similar device that may be positioned in a low-profile state during a lead implant procedure. After the lead is positioned at a target destination, the spring member may be deployed an amount that is selected based on the characteristics of the surrounding tissue, including vessel size. According to one aspect of the invention, the lead assembly may provide means for facilitating chronic lead extraction.
摘要:
A medical system incorporating fluid delivery and lead delivery lumens dispense fluid into a volume of tissue. The fluid comprises or contains a pharmacologic, genetic, or biologic agent. The fluid may be dispensed initially during implantation or later using a minimally invasive medical procedure.
摘要:
An improved suture sleeve for a lead body includes an elongated tubular sleeve body formed of a compressible elastomeric material wherein a surface of the lumen has a relatively rough texture formed by a particulate or fibrous media embedded therein.
摘要:
A bipolar cardiac vein lead and method of assembly is provided wherein the lead includes a flexible coil anode electrode such that the lead may be advanced through a tortuous pathway. The coil electrode is coupled to a conductor using a method of assembly that minimizes or eliminates rigid components, maintaining flexibility of the distal lead end. Multi-polar cardiac vein leads may include multiple flexible coil electrodes to achieve pacing and/or sensing in the left atrium and the left ventricle or at multiple left heart sites.
摘要:
An electrical medical lead is provided having two or more electrodes, electrically insulated from each other and electrically coupled to individually insulated filars in a multi-filar coiled conductor. When the lead is used with a medical device equipped with a switch matrix, electrodes are selected individually or simultaneously to serve as an anode or cathode in any unipolar, bipolar or multi-polar configuration for delivering stimulation and/or sensing signals in excitable tissue. In one embodiment, a tip electrode array is expandable for improving electrode contact with targeted tissue and stabilizing lead position.
摘要:
An implantable lead system includes an elongated device slideably engaged within a lumen of a lead body. A distal portion of the elongated device is slidable through a helix tip coupled to a distal end of the lead body by passing through a pierceable fluid-tight seal disposed in proximity to the distal end of the lead body; the seal prevents ingress of bodily fluid into the lumen of the lead body.
摘要:
An electrical connector has a compressible portion that expands to accept an inserted lead and then contracts around the lead to provide both an electrical and a spring-like mechanical connection to the lead. The connector may have a fluted pin that collapses around the lead body when a set screw of the connector port is tightened. Alternatively, a middle segment of a pin may have indentations or slots that collapse around an inserted lead body. The connector can be attached to the lead body after the lead body is implanted in the body of the patient. In lead systems in which the lead body is implanted using a guide catheter, attaching the connector to the lead body after implantation makes removal of the guide catheter much less difficult.
摘要:
A medical electrical lead having an elongated insulative sheath carrying an elongated electrical conductor therein and having a drug-dispensing electrode assembly coupled to a distal end of the elongated conductor. The electrode assembly takes the form of a conductive electrode member having a distal electrode portion exposed exterior to the elongated sheath and a shank portion extending proximally from the distal portion and coupled to the elongated conductor. A drug release device is mounted around the shank proximal to the distal portion of the electrode member and the electrode member is provided with at least one bore extending from a surface of the release device to a surface of the distal portion of the electrode member.
摘要:
An implantable sensing device includes a sensing element and a mounting element. The mounting element has a first end and a second end with a longitudinal axis therethrough. The sensing element is positioned at the first end of the mounting element with the mounting element having a length that is adjustable along the longitudinal axis. The mounting element includes a sleeve having a first open end and a second open end with the longitudinal axis therethrough. The sensing element is positioned in the second open end and includes a lead body connected thereto extending through the second open end. The sleeve includes an outer sleeve member coupled for adjustment along the longitudinal axis with respect to an inner sleeve member. Further, the mounting element may include a flexible element about the first open end extending outwardly relative to the longitudinal axis and a flange element extending outwardly relative to the longitudinal axis from at least a portion of the second end. The device can be implanted in a bone with the flange element and the flexible element for direct or indirect contact with the anterior and posterior surface of the bone. A method of implanting the sensor includes providing a sensing element and drilling a hole in a bone. The hole extends to the intrathoracic cavity. The sensing element is inserted into the hole and positioned in communication with a region in the intrathoracic cavity. The hole is drilled in the manubrium. When the flexible element is inserted into the hole, the flexible element about the first open end collapses towards the longitudinal axis and when the sensor mounting assembly is removed from the hole, the flexible element collapses towards the longitudinal axis during removal. Methods for providing stimulation of a patient to treat respiratory disorders using the sensor are also provided as are stimulation systems for providing stimulation of a patient to treat respiratory disorders.