| Catheter system for implanting an intravascular medical device -> Monitor Keywords |
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Catheter system for implanting an intravascular medical deviceRelated Patent Categories: Surgery: Light, Thermal, And Electrical Application, Light, Thermal, And Electrical Application, Electrical Energy Applicator, Placed In BodyCatheter system for implanting an intravascular medical device description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20060241732, Catheter system for implanting an intravascular medical device. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This is a continuation in part of U.S. patent application Ser. No. 11/112,181 filed on Apr. 22, 2005. STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] Not Applicable BACKGROUND OF THE INVENTION [0003] 1. Field of the Invention [0004] The present invention relates to medical devices that are implanted into the vasculature of an animal, and more particularly to the apparatus for performing the implantation. [0005] 2. Description of the Related Art [0006] A remedy for people with slowed or disrupted natural heart activity is to implant a cardiac pacing device which is a small electronic apparatus that stimulates the heart to beat at regular rates. [0007] Typically the pacing device is implanted in the patient's chest and has sensor electrodes that detect electrical impulses associated with in the heart contractions. These sensed impulses are analyzed to determine when abnormal cardiac activity occurs, in which event a pulse generator is triggered to produce electrical pulses. Wires carry these pulses to electrodes placed adjacent specific cardiac muscles, which when electrically stimulated contract the heart chambers. It is important that the electrodes be properly located to produce contraction of the heart chambers. [0008] Modem cardiac pacing devices vary the stimulation to adapt the heart rate to the patient's level of activity, thereby mimicking the heart's natural activity. The pulse generator modifies that rate by tracking the activity of the sinus node of the heart or by responding to other sensor signals that indicate body motion or respiration rate. [0009] U.S. Pat. No. 6,445,953 describes a cardiac pacemaker that has a pacing device, which can be located outside the patient, to detect abnormal electrical cardiac activity. In that event, the pacing device emits a radio frequency signal, that is received by a stimulator implanted in a vein or artery of the patient's heart. Specifically, the radio frequency signal induces a voltage pulse in an antenna on the stimulator and that pulse is applied across a pair of electrodes, thereby stimulating adjacent muscles and contracting the heart. [0010] The stimulator in that wireless system is powered by the energy of the received signal thus requiring that the pacing device transmit a relatively strong radio frequency signal in order to provide adequate energy to the stimulator implanted deep in the patient's chest. It is desirable to place the stimulator, or at least the antenna for the stimulator, in a blood vessel located closer to the skin of the patient with electrodes implanted in one or more cardiac blood vessels and connected to the stimulator by wires extending through the electronic circuit circulatory system. This would enable more of the energy from the frequency signal to reach the stimulator, however, the blood vessels close to the skin are not sufficiently large to accommodate the size of the stimulator. [0011] The antenna, usually in the form of a coil, must possess several characteristics in order to function within the blood vessel. The coil must retain its shape in order to remain tuned to the particular radio frequency being used. The conductors of the antenna have to be insulated so that the blood and other substances flowing through the vascular system do not provide a short circuit or otherwise detune the antenna. In addition the antenna must be biologically compatible with the blood vessel walls and with the blood. [0012] Therefore, it is desirable to provide an apparatus for positioning each of the components of the medical device in the patient. SUMMARY OF THE INVENTION [0013] A catheter system is provided to implant a medical device in an animal, wherein the medical device has a plurality of components that are to be placed at different locations. The system is particular adapted to implant a medical device in which the components are electrically interconnected by wires. [0014] The catheter system comprises a guide wire, a first catheter with a guide wire lumen for slidably receiving the guide wire, and a tubular outer sheath through which the first catheter extends. A first cavity is formed between the first catheter and the outer sheath within which a first component of the medical device is releasably located. A second cavity also is formed between the first catheter and the outer sheath within which a second component of the medical device is releasably located. [0015] In a preferred embodiment, the catheter system further includes a second catheter with a lumen within which the first catheter is slidably received. Thus, the first and second catheters are both within the outer sheath. The first cavity is located between the first and second catheters and the second cavity is located between the second catheter and the outer sheath. As an option, an inner sheath may be provided between the first and second catheters, with the first cavity between the first catheter and the inner sheath. More catheters and sheaths may be added coaxially on the catheter system to deliver additional components into the animal. [0016] The catheter system is manipulatable to independently release each of the first and second components at different locations in the animal. Initially the guide wire is inserted into the animal to a first location. Then, the assembly of catheters is slid over the guide wire until reaching the first location. The outer sheath is moved over the second catheter to expose the second component, that is deposited at the first location. [0017] If a desired second location for implantation of the second first component is along the existing route of the guide wire through the animal, the first and second catheters are slid along the guide wire to place the first component at the second location. Otherwise, the guide wire can be repositioned to the second location before the first and second catheters are slid into place. Thereafter, the first and second catheters are moved with respect to each other to expose the first component, which is deposited at the second location. [0018] A second embodiment of a catheter system having two guide wires and two catheter assemblies, one for each guide wire, also is described. The two catheter assemblies cooperate to implant a greater plurality of components, that are electrically interconnected by wires. BRIEF DESCRIPTION OF THE DRAWINGS [0019] FIG. 1 is a representation of a cardiac pacing system attached to a medical patient; Continue reading about Catheter system for implanting an intravascular medical device... Full patent description for Catheter system for implanting an intravascular medical device Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Catheter system for implanting an intravascular medical device patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. 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