Patent application number | Description | Published |
20080228090 | METHOD AND APPARATUS FOR MANAGEMENT OF HEART FAILURE HOSPITALIZATION - A hospitalization management system including a heart failure analyzer that receives diagnostic data including at least sensor data representative of one or more physiological signals sensed from a hospitalized patient using one or more sensors and assesses risk of rehospitalization for the patient using the diagnostic data. The outcome of the risk assessment is used during and following the patient's hospitalization for reducing the risk of rehospitalization. | 09-18-2008 |
20090069720 | Logging daily average metabolic activity using a motion sensor - An implantable activity detector can detect metabolic stress levels, which can be normalized, such as to identify times of activities such as walking and running or to identify trends such as a decrease in metabolic activity. The data can be derived from different sources such as an accelerometer and pedometer. This data can be compared to independently specifiable thresholds, such as to trigger an alert or responsive therapy, or to display one or more trends. The information can also be combined with other congestive heart failure (CHF) indications. The alert can notify the patient or a caregiver, such as via remote monitoring. Metabolic activity data from one or more of the activity detectors can be used to establish a model of metabolic stress, to which further activity data can be compared for identifying periods of increased or decreased metabolic stress. | 03-12-2009 |
20090149719 | System And Method For Performing Remote Patient Risk Assessment Through A Visual Analog Scale - A system and method for integrating qualitative assessment into remote patient management through a visual analog scale is provided. A query is associated to a physiological condition. A visual analog scale includes a linear gradient and, at each end, descriptors for a range of subjective and continuous responses to the query. Assessment data for a patient is obtained. A medical device of the patient is interrogated and stored data is received. The query is displayed with the visual analog scale. An answer to the query includes a point selected between the ends of and along the linear gradient. A distance of the point from one end of the linear gradient is determined. The distance is quantified as a fixed value in proportion to the distance. A risk to the patient is assessed. The stored data and the fixed value are analyzed against the physiological condition to represent patient wellness. | 06-11-2009 |
20090312659 | MANAGING PRELOAD RESERVE BY TRACKING THE VENTRICULAR OPERATING POINT WITH HEART SOUNDS - A system and method for managing preload reserve and tracking the inotropic state of a patient's heart. The S1 heart sound is measured as a proxy for direct measurement of stroke volume. The S3 heart sound may be measured as a proxy for direct measurement of preload level. The S1-S3 pair yield a point on a Frank Starling type of curve, and reveal information regarding the patient's ventricular operating point and inotropic state. As an alternative, or in addition to, measurement of the S3 heart sound, the S4 heart sound may be measured or a direct pressure measurement may be made for the sake of determining the patient's preload level. The aforementioned measurements may be made by a cardiac rhythm management device, such as a pacemaker or implantable defibrillator. | 12-17-2009 |
20100016678 | CARDIAC REHABILITATION USING PATIENT MONITORING DEVICES - Systems and methods permit remotely-monitored rehabilitation of a patient. A system can comprise a patient monitor configured to monitor a patient's physiological data. The patient monitor can monitor using a first monitoring mode. A patient communication device can be configured to present, to the patient, an option to perform an exercise regimen, and to receive a response indicating whether the patient will perform the exercise regimen. A configuration module coupled to the patient communication device can be configured to activate a second monitoring mode when the response indicates that the patient will perform the exercise regimen. When the exercise regimen is complete, the first monitoring mode can be re-established. When the response indicates that the patient will not perform the exercise regimen, the response can be recorded as a negative response, and the option to perform the exercise regimen can be presented again. | 01-21-2010 |
20100022911 | SYSTEMS AND METHODS FOR MONITORING PULMONARY EDEMA DYNAMICS - This document discusses, among other things, systems and methods for measuring the dynamics of pulmonary congestion in heart failure subjects over time to monitor the subjects susceptibility to pulmonary edema, including sensing and receiving information indicative of a bodily pressure and information indicative of pulmonary fluid, and using the transient responses of these measurements to compute parameters related to the dynamics of thoracic fluid accumulation, such as a critical pressure (P | 01-28-2010 |
20100076398 | CENTRAL VENOUS PRESSURE SENSOR AND METHOD TO CONTROL A FLUID OR VOLUME OVERLOAD THERAPY - An implantable system for monitoring a hydration state of a patient and adjusting fluid removal from the patient includes a pressure sensor implantable within an inferior vena cava of the patient and a processor. The pressure sensor senses and generates an output representative of a baseline inferior vena caval pressure value of the patient and chronically senses and generates outputs representative of an inferior vena caval pressure value of the patient. The processor compares differences between the baseline inferior vena caval pressure value and subsequent inferior vena caval pressure values. The processor can reside in another implantable device or in an external device/system. | 03-25-2010 |
20100087890 | TRACKING PROGRESSION OF CONGESTIVE HEART FAILURE VIA A FORCE-FREQUENCY RELATIONSHIP - A system, method, or device monitor a force-frequency relationship exhibited by a patient's heart. A contractility characteristic, such as a heart sound characteristic of an S | 04-08-2010 |
20100094102 | MULTI-SENSOR STRATEGY FOR HEART FAILURE PATIENT MANAGEMENT - An apparatus comprises plurality of sensors and a processor. Each sensor provides a sensor signal that includes physiological information and at least one sensor is implantable. The processor includes a physiological change event detection module that detects a physiological change event from a sensor signal and produces an indication of occurrence of one or more detected physiological change events, and a heart failure (HF) detection module. The HF detection module determines, using a first rule, whether the detected physiological change event is indicative of a change in HF status of a subject, determines whether to override the first rule HF determination using a second rules, and declares whether the change in HF status occurred according to the first and second rules. | 04-15-2010 |
20100145403 | SENSING RATE OF CHANGE OF PRESSURE IN THE LEFT VENTRICLE WITH AN IMPLANTED DEVICE - An implantable device and method for monitoring S1 heart sounds with a remotely located accelerometer. The device includes a transducer that converts heart sounds into an electrical signal. A control circuit is coupled to the transducer. The control circuit is configured to receive the electrical signal, identify an S1 heart sound, and to convert the S1 heart sound into electrical information. The control circuit also generates morphological data from the electrical information. The morphological data relates to a hemodynamic metric, such as left ventricular contractility. A housing may enclose the control circuit. The housing defines a volume coextensive with an outer surface of the housing. The transducer is in or on the volume defined by the housing. | 06-10-2010 |
20100179620 | SYSTEM AND METHOD FOR PROMOTING DIURESIS AND NATRIURESIS BY THE APPLICATION OF ELECTRIC FIELDS TO THE KIDNEY - A system and method of applying an electric field to the kidney of a subject can reduce renal salt and water retention through the process of electrophoresis. The system includes a first and a second electrode, at least of which is implantably associated with the kidney. The electric field can be controlled to affect the removal of a first constituent (e.g. sodium) from the kidney while the level of a second constituent (e.g. potassium) is maintained within normal physiological range. | 07-15-2010 |
20100286746 | APPLICATION OF ELECTRIC FIELDS TO THE LUNG AS THERAPY FOR PULMONARY EDEMA - System and method of applying electric fields to a patient's lung(s) to reduce pulmonary edema. The system includes a first electrode and a second electrode, at least one of which is associated with the lung. The electric field can be controlled so as to modulate a level of fluid in the lung. | 11-11-2010 |
20110034812 | PULMONARY ARTERY PRESSURE BASED SYSTOLIC TIMING INTERVALS AS A MEASURE OF RIGHT VENTRICULAR SYSTOLIC PERFORMANCE - Systems and methods include identifying a first portion and a second portion of a pulmonary artery pressure (PAP) signal during a cardiac cycle. A first timing interval between the first portion and the second portion is obtained and data related to the first timing interval is trended to provide a chronic physiological prognostic indicator. In an embodiment, a second timing interval is obtained from a third portion and a fourth portion of the PAP signal. Then, a function of the first and second timing intervals is trended to provide the chronic physiological prognostic indicator. In one instance, a ratio of the first interval to the second interval is calculated to provide an estimated right ventricle ejection fraction (RVEF) and the RVEF is trended. | 02-10-2011 |
20110093026 | METHOD AND APPARATUS FOR CARDIORENAL ELECTRICAL STIMULATION - An implantable cardiorenal stimulator delivers cardiorenal stimulation in response to detection of decompensation associated with heart failure. The cardiorenal stimulation includes delivering renal stimulation pulses to promote diuresis and/or natriuresis and delivering cardiac stimulation pulses to enhance the diuretic and/or natriuretic effects of the renal stimulation pulses. | 04-21-2011 |
20110144712 | VENTRICULAR PACING TO AUGMENT ATRIAL NATRIURETIC HORMONE PRODUCTION - Intermittent delivery of ventricular pacing pulses synchronized to occur during an atrial diastole time period can be used to provide atrial stretch therapy and augment the production and release of atrial natriuretic hormone. | 06-16-2011 |
20110263988 | SENSING RATE OF CHANGE OF PRESSURE IN THE LEFT VENTRICLE WITH AN IMPLANTED DEVICE - An implantable device and method for monitoring S1 heart sounds with a remotely located accelerometer. The device includes a transducer that converts heart sounds into an electrical signal. A control circuit is coupled to the transducer. The control circuit is configured to receive the electrical signal, identify an S1 heart sound, and to convert the S1 heart sound into electrical information. The control circuit also generates morphological data from the electrical information. The morphological data relates to a hemodynamic metric, such as left ventricular contractility. A housing may enclose the control circuit. The housing defines a volume coextensive with an outer surface of the housing. The transducer is in or on the volume defined by the housing. | 10-27-2011 |
20110264042 | CONDUCTIVE POLYMER MATERIALS AND APPLICATIONS THEREOF INCLUDING MONITORING AND PROVIDING EFFECTIVE THERAPY - A coupler includes a conductive polymer material that is so constructed and arranged to join tubing, wherein the conductive polymer material includes a conductive polymer component selected from the group consisting of polyaniline, polypyrrole, polythiophenes, polyethylenedioxythiophene, poly(p-phenylene vinylene) and mixtures thereof. | 10-27-2011 |
20110301473 | SYSTEM AND METHOD FOR ASSESSING CARDIAC PERFORMANCE THROUGH CARDIAC VIBRATION MONITORING - A system and method for assessing cardiac performance through cardiac vibration monitoring is described. Cardiac vibration measures are directly collected through an implantable medical device. Cardiac events including at least one first heart sound reflected by the cardiac vibration measures are identified. The first heart sound is correlated to cardiac dimensional measures relative to performance of an intrathoracic pressure maneuver. The cardiac dimensional measures are grouped into at least one measures set corresponding to a temporal phase of the intrathoracic pressure maneuver. The at least one cardiac dimensional measures set is evaluated against a cardiac dimensional trend for the corresponding intrathoracic pressure maneuver temporal phase to represent cardiac performance. | 12-08-2011 |
20120041325 | METHOD AND APPARATUS FOR MANAGEMENT OF HEART FAILURE HOSPITALIZATION - A hospitalization management system including a heart failure analyzer that receives diagnostic data including at least sensor data representative of one or more physiological signals sensed from a hospitalized patient using one or more sensors and assesses risk of rehospitalization for the patient using the diagnostic data. The outcome of the risk assessment is used during and following the patient's hospitalization for reducing the risk of rehospitalization. | 02-16-2012 |
20120157797 | DETECTING HEART FAILURE BY MONITORING THE TIME SEQENCE OF PHYSIOLOGICAL CHANGES - Systems and methods for detecting heart failure by monitoring the time-sequence of physiological changes of a subject using a state machine circuit configured to receive information about physiological characteristics of the subject is described. The current state transitions between a first and a second state in response to a first transition trigger. The current state transitions between the second and first states in response to at least one of the expiration of a first timer or ceasing of the first transition trigger. The current state transitions between the second and third states in response to a second transition trigger. The current state transitions between the third and second states in response to at least one of expiration of a second timer or ceasing of the second transition trigger. | 06-21-2012 |
20120157858 | MONITORING PROJECTIONS ALONG PRINCIPAL COMPONENTS OF MULTIPLE SENSORS AS AN INDICATOR OF WORSENING HEART FAILURE - A device can include at least a first physiologic sensor circuit configured to provide a first physiologic signal, a second physiologic sensor circuit configured to provide a second physiologic signal, and a processor circuit. The processor circuit includes a principal component analysis circuit configured to represent data determined from the at least first and second physiologic sensor circuits as at least first and second axes, respectively, in a multidimensional space, determine one or more principal components in the multidimensional space, determine a quantitative attribute of the first and the second physiologic signals using at least one of the determined principal components or a projection of the data along the at least one determined principal component, and provide an indication of heart failure status according to the quantitative attribute to at least one of a user or a process. | 06-21-2012 |
20120203092 | PATIENT HEALTH IMPROVEMENT MONITOR - Systems and methods to monitor an improvement of a subject's physiological condition using a goal improvement profile are described. In an example, a physiological condition of a subject can be compared to a goal improvement profile, where the profile includes at least one target condition indicative of an improved physiological condition detectable using a physiological sensor signal, and a target time when the subject is expected to reach the target condition, where the comparison can be used to indicate whether the subject has met the target condition by the target time. | 08-09-2012 |
20120203116 | MANAGING PRELOAD RESERVE BY TRACKING THE VENTRICULAR OPERATING POINT WITH HEART SOUNDS - A system and method for managing preload reserve and tracking the inotropic state of a patient's heart. The S1 heart sound is measured as a proxy for direct measurement of stroke volume. The S3 heart sound may be measured as a proxy for direct measurement of preload level. The S1-S3 pair yield a point on a Frank Starling type of curve, and reveal information regarding the patient's ventricular operating point and inotropic state. As an alternative, or in addition to, measurement of the S3 heart sound, the S4 heart sound may be measured or a direct pressure measurement may be made for the sake of determining the patient's preload level. The aforementioned measurements may be made by a cardiac rhythm management device, such as a pacemaker or implantable defibrillator. | 08-09-2012 |
20120303079 | APPARATUS AND METHOD FOR COMBINED CARDIAC FUNCTION MANAGEMENT AND RENAL THERAPIES - A system can coordinate operation of a cardiac function management (CFM) device and a renal device, such as during a vulnerable period in which a patient has an increased risk of tachyarrhythmia. | 11-29-2012 |
20120330174 | SENSING RATE OF CHANGE OF PRESSURE IN THE LEFT VENTRICLE WITH AN IMPLANTED DEVICE - An implantable device and method for monitoring S1 heart sounds with a remotely located accelerometer. The device includes a transducer that converts heart sounds into an electrical signal. A control circuit is coupled to the transducer. The control circuit is configured to receive the electrical signal, identify an S1 heart sound, and to convert the S1 heart sound into electrical information. The control circuit also generates morphological data from the electrical information. The morphological data relates to a hemodynamic metric, such as left ventricular contractility. A housing may enclose the control circuit. The housing defines a volume coextensive with an outer surface of the housing. The transducer is in or on the volume defined by the housing. | 12-27-2012 |
20130060151 | METHOD AND APPARATUS FOR MANAGEMENT OF HEART FAILURE HOSPITALIZATION - A hospitalization management system including a heart failure analyzer that receives diagnostic data including at least sensor data representative of one or more physiological signals sensed from a hospitalized patient using one or more sensors and assesses risk of rehospitalization for the patient using the diagnostic data. The outcome of the risk assessment is used during and following the patient's hospitalization for reducing the risk of rehospitalization. | 03-07-2013 |
20130123878 | APPLICATION OF ELECTRIC FIELDS TO THE LUNG AS THERAPY FOR PULMONARY EDEMA - System and method of applying electric fields to a patient's lung(s) to reduce pulmonary edema. The system includes a first electrode and a second electrode, at least one of which is associated with the lung. The electric field can be controlled so as to modulate a level of fluid in the lung. | 05-16-2013 |
20130165755 | PHYSIOLOGICAL STATUS INDICATOR APPARATUS AND METHOD - A processor circuit can be configured to obtain a first multidimensional vector. The first multidimensional vector can include dimensions corresponding to respective first conductivity characteristics obtained from different implantable electrode configurations associated with a subject. The processor circuit can also be configured to obtain a second multidimensional vector or vector space. The second multidimensional vector or vector space can include dimensions corresponding to respective second conductivity characteristics obtained from such different electrode configurations associated with the same or a different subject. The processor circuit can also provide a physiological status indicator that can be obtained at least in part by performing a vector comparison of the first multidimensional vector to the second multidimensional vector space or vector. | 06-27-2013 |
20130178786 | REMOTE CLOSED-LOOP TITRATION OF DECONGESTIVE THERAPY FOR THE TREATMENT OF ADVANCED HEART FAILURE - An apparatus comprises one or more physiological sensing circuits that generate a sensed physiological signal and at least one of the physiological sensing circuits is implantable, a measurement circuit configured to recurrently measure one or more physiological parameters that indicate a status of heart failure of the subject, a comparison circuit configured to compare the one or more physiological parameter measurements to one or more physiological parameter target values, a therapy circuit configured to control delivery of one or more drugs to treat heart failure, and a control circuit in electrical communication with the comparison circuit and the therapy circuit and configured to recurrently adjust delivery of drug therapy according to the comparison of the measured physiological parameters to the physiological parameter targets. | 07-11-2013 |
20130324900 | SYSTEM AND METHOD FOR ACTIVE BYPASS DIALYSIS ACCESS DISCONNECTION DETECTION - A dialysis system comprising: a blood circuit including a blood pump, a dialyzer, and an air removal apparatus; an arterial line of the blood circuit extending from the blood pump to an arterial access needle; a venous line of the blood circuit extending from the air removal apparatus to a venous access needle; arterial and venous conductive connections placed along the arterial and venous lines, respectively; a first electrical potential source configured to apply a first electrical potential between (i) the arterial and venous conductive connections and (ii) the arterial and venous access needles; and a second electrical potential source configured to apply a second electrical potential between (a) the arterial and venous conductive connections and (b) one of the blood pump, dialyzer or air removal device. | 12-05-2013 |
20140018690 | SENSING RATE OF CHANGE OF PRESSURE IN THE LEFT VENTRICLE WITH AN IMPLANTED DEVICE - An implantable device and method for monitoring S1 heart sounds with a remotely located accelerometer. The device includes a transducer that converts heart sounds into an electrical signal. A control circuit is coupled to the transducer. The control circuit is configured to receive the electrical signal, identify an S1 heart sound, and to convert the S1 heart sound into electrical information. The control circuit also generates morphological data from the electrical information. The morphological data relates to a hemodynamic metric, such as left ventricular contractility. A housing may enclose the control circuit. The housing defines a volume coextensive with an outer surface of the housing. The transducer is in or on the volume defined by the housing. | 01-16-2014 |
20140031886 | VENTRICULAR PACING TO AUGMENT ATRIAL NATRIURETIC HORMONE PRODUCTION - Intermittent delivery of ventricular pacing pulses synchronized to occur during an atrial diastole time period can be used to provide atrial stretch therapy and augment the production and release of atrial natriuretic hormone. | 01-30-2014 |
20140073971 | MANAGING PRELOAD RESERVE BY TRACKING THE VENTRICULAR OPERATING POINT WITH HEART SOUNDS - A system and method for managing preload reserve and tracking the inotropic state of a patient's heart. The S1 heart sound is measured as a proxy for direct measurement of stroke volume. The S3 heart sound may be measured as a proxy for direct measurement of preload level. The S1-S3 pair yield a point on a Frank Starling type of curve, and reveal information regarding the patient's ventricular operating point and inotropic state. As an alternative, or in addition to, measurement of the S3 heart sound, the S4 heart sound may be measured or a direct pressure measurement may be made for the sake of determining the patient's preload level. The aforementioned measurements may be made by a cardiac rhythm management device, such as a pacemaker or implantable defibrillator. | 03-13-2014 |
20140142440 | METHOD AND APPARATUS FOR MANAGEMENT OF HEART FAILURE HOSPITALIZATION - A hospitalization management system including a heart failure analyzer that receives diagnostic data including at least sensor data representative of one or more physiological signals sensed from a hospitalized patient using one or more sensors and assesses risk of rehospitalization for the patient using the diagnostic data. The outcome of the risk assessment is used during and following the patient's hospitalization for reducing the risk of rehospitalization. | 05-22-2014 |
20140221786 | MULTI-SENSOR STRATEGY FOR HEART FAILURE PATIENT MANAGEMENT - An apparatus comprises plurality of sensors and a processor. Each sensor provides a sensor signal that includes physiological information and at least one sensor is implantable. The processor includes a physiological change event detection module that detects a physiological change event from a sensor signal and produces an indication of occurrence of one or more detected physiological change events, and a heart failure (HF) detection module. The HF detection module determines, using a first rule, whether the detected physiological change event is indicative of a change in HF status of a subject, determines whether to override the first rule HF determination using a second rules, and declares whether the change in HF status occurred according to the first and second rules. | 08-07-2014 |
20150038854 | SYSTEM AND METHOD FOR DETECTING WORSENING OF HEART FAILURE BASED ON RAPID SHALLOW BREATHING INDEX - Systems and methods for detecting a worsening of patient's heart failure condition based, at least in part, on an increasing trend in a representative rapid shallow breathing index (RSBI) value over multiple days. The RSBI value may be a minimum RSBI, and more particularly may be a minimum RSBI value determined for an afternoon portion of each of the multiple days. The minimum RSBI value measured during an afternoon portion of the day may be more sensitive to changes in a patient's respiration, particularly when a patient is expected to be more active, and thus, may more readily exhibit an increasing trend when patient's heart failure is in decline. | 02-05-2015 |
20150038866 | SYSTEM AND METHOD FOR DETECTING WORSENING OF HEART FAILURE BASED ON TIDAL VOLUME - Systems and methods for detecting a worsening of a patient's heart failure condition based, at least in part, on a declining trend in a representative tidal volume value over multiple days. The tidal volume value may be a maximum tidal volume, and more particularly, a maximum tidal volume determined for an afternoon portion of each of the multiple days or a selected portion of each of the multiple days that excludes a night portion. The maximum tidal volume during these portions of the day may be more sensitive to changes in a patient's respiration, particularly when a patient is expected to be more active, and thus, may more readily exhibit a declining trend when the patient's heart failure status is in decline. | 02-05-2015 |
20150073203 | HEART FAILURE SYSTEMS AND METHODS - Embodiments of the disclosure include medical device systems and related methods. In an embodiment, the disclosure includes a medical device system. The medical device system can include a cardiac device. The cardiac device can include a processor, a memory, a communications circuit, and one or more sensors. The cardiac device can be configured to engage a sensor mode specific for patients receiving or having implanted ventricular assist devices. The cardiac device can be configured to process data as specified by the sensor mode specific for patients receiving or having implanted ventricular assist devices. In an embodiment, the disclosure includes a method for monitoring heart failure patients. In an embodiment, the disclosure includes a method of controlling devices for heart failure patients. Other embodiments are also included herein. | 03-12-2015 |