Implantable cardiac function monitor and stimulator for diagnosis and therapy delivery
May 16, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesBiomedical method and apparatus for controlling the administration of therapy to a patient in response to changes in physiologic demand Apparatus and method for adjusting heart/pacer rate relative to ejection time to obtain a required cardiac output Method and apparatus including a sliding insulation lead for cardiac assistance Physiologic control of pacemaker rate using pre-ejection interval as the controlling parameter Cardiac pacemaker Pacing system and method for cardiac pacing as a function of determined myocardial contractility Multiple monopolar system and method of measuring stroke volume of the heart Muscle fitness detection by colorimetry Muscle stimulator with variable duty cycle Rate adaptive pacemaker controlled by ejection fraction InventorsApplicationNo. 243069 filed on 05/16/1994US Classes:607/18, Plural sensed conditions607/3, Combined with nonelectrical therapy607/23, Blood pressure607/24Stroke volumeExaminersPrimary: Kamm, William E.Assistant: Schaetzle, Kennedy J. Attorney, Agent or FirmInternational ClassA61N 001/365AbstractAn implantable monitor/stimulator is disclosed that monitors and assesses indices of cardiac function, including the strength and timing of cardiac contraction, then automatically executes a physician-selected mode of therapy. It accomplishes this by assessing impedance, electrocardiogram, and/or pressure measurements, then calculating various cardiac parameters. The results of these calculations may be stored within the device, telemetered to an external monitor or display and/or may be used by the physician to determine the mode of therapy to be chosen. If indicated, therapy is administered by the device itself or by telemetering control signals to various peripheral devices for the purpose of enhancing either contraction or relaxation of the heart. The cardiac parameters that are calculated all provide an assessment of level of cardiac function by monitoring changes in ventricular filling and ejection or by calculating isovolumic phase indices of heart contraction. Examples of such parameters are ejection fraction, cardiac output, stroke work, and/or various pressure-volume relationships. These parameters determine the mode of therapy that will be selected by a physician. Choices of therapy include several forms of pacing of cardiac or skeletal muscle, and telemetry to implanted or external units for drug infusion or for monitoring by a central data system.Other References
Field of SearchCombined with nonelectrical therapyElectrical therapeutic systems Stroke volume Heart rate regulating (e.g., pacing) Parameter control in response to sensed physiological load on heart Plural sensed conditions Blood pressure CARDIAC AUGMENTATION (PULSATORS, ETC.) With condition responsive means | |
