Class / Patent application number | Description | Number of patent applications / Date published |
600506000 | By detecting electrical impedance of body portion | 24 |
20080275352 | Cerebral Perfusion Monitor - A method of estimating cerebral blood flow includes obtaining a measure of time-varying blood volume in the head, using an impedance plethysmography ( | 11-06-2008 |
20090177099 | PERIPHERAL IMPEDANCE PLETHYSMOGRAPHY ELECTRODE AND SYSTEM WITH DETECTION OF ELECTRODE SPACING - In a system and method for peripheral impedance plethysmography, an electrode for application to the patient's limb includes two outer current electrodes and two inner voltage electrodes. A distance between the two inner electrodes is automatically input into an analyzing device, either as a pre-stored value or as determined automatically from the electrode. Peripheral blood flow is calculated in accordance with that distance. | 07-09-2009 |
20090204013 | WEARABLE MONITORING SYSTEM - A system for measuring/monitoring the vital signs of a patient especially blood pressure, comprising a plurality of electrodes arranged at least in the waistband of an undergarment, and means for deriving measurements from the electrodes using pulse-transit times. | 08-13-2009 |
20090209872 | Method and Device for Determining Flow in a Blood Vessel - The invention relates to a method and device for determining the flow in a blood vessel, comprising the determining the relation between the shear rate and the impedance of flowing blood, measuring the impedance in the blood in a cross-section of the blood vessel, determining the shear rate from this relation and the measured impedance, determining the size of the cross-section of the blood vessel, selecting a theoretical relative flow distribution over the blood vessel cross-section, determining the average flow speed on the basis of the average shear rate and the relative flow distribution, and determining the flow volume from the determined average flow speed and the cross-section. | 08-20-2009 |
20090259132 | Apparatus And Method For Determination Of Stroke Volume Using The Brachial Artery - Provided herein are methods and apparatus for stroke volume determination by bioimpedance from a patient's upper arm, or brachium, or a patient's thorax, utilizing pulsations of the arteries contained therein. The apparatus includes two or more spaced apart alternating current flow electrodes positioned on the patient's arm or thorax and two or more spaced apart voltage sensing electrodes positioned on the patient's arm or thorax and in-between alternating current flow electrodes. The system and method utilizes voltage sensed by the voltage sensing electrodes to calculate a cardiogenically induced impedance variation value of the patient, and to determine a stroke volume of the patient by multiplying the cardiogenicaly induced impedance variation value by a volume conductor V | 10-15-2009 |
20090264776 | MEASUREMENT OF PHYSIOLOGICAL CHARACTERISTICS - A system for measuring physiological aspects has a non-invasive monitor configured to generate monitor signals relating to fluid characteristics in the body. A computational device is operatively connected to the monitor and is configured to process the monitor signals to generate characterising data relating to at least one of regional fluid volumes, intra/extracellular fluid volume ratios and blood flow. A data output device is connected to the computational device and is configured to output the characterising data. A method and a computer program product for measuring physiological characteristics are also provided. | 10-22-2009 |
20090264777 | Determining a Flow Characteristic of a Material in a Structure - An volume of a patient can be mapped with a system operable to identify a plurality of locations and save a plurality of locations of a mapping instrument. The mapping instrument can include one or more electrodes that can sense a voltage that can be correlated to a three dimensional location of the electrode at the time of the sensing or measurement. Therefore, a map of a volume can be determined based upon the sensing of the plurality of points without the use of other imaging devices. An implantable medical device can then be navigated relative to the mapping data. | 10-22-2009 |
20090287102 | BLOOD FLOW ASSESSMENT OF VENOUS INSUFFICIENCY - Impedance analysis can be used to measure calf muscle pump (CMP) function in a patient. This may be done by applying electrical signals via a first set of electrodes, and measuring the impedance via a second set of electrodes. The change in impedance as the patient undergoes calf extension or exercise may be measured, and the change in impedance may then be used to assess CMP function. The change in impedance may be used to determine an indicator indicative of the volume of blood ejected by the CMP. | 11-19-2009 |
20100210958 | SYSTEM, METHOD AND DEVICE FOR MONITORING THE CONDITION OF AN INTERNAL ORGAN - A system, method and device for monitoring the condition of an internal organ, such as a brain, by providing an internal electrode. The internal electrode is operatively connected to at least one surface, external, electrode, and a system handler. A signal is generated between the electrodes such that the electrical properties, including conductivity and impedance among others, can be measured at and across the electrodes. The electrode arrangement allows for continuous monitoring of an internal organ and, where desired, mapping of the electrical properties thereof. The system obtains pressure readings, nodal conductivity and/or electrode impedance to monitor, map and report the condition of the internal organ. A correlation procedure is provided for generating a graphical representation of the condition of an internal organ from the gathered data. A medical treatment method is also provided for monitoring the status of the brain, and includes providing an internal electrode for measuring electrical properties of the internal organ. | 08-19-2010 |
20100312128 | SYSTEMS AND METHODS FOR MONITORING BLOOD PARTITIONING AND ORGAN FUNCTION - Methods and systems for monitoring an organ of interest within a patient use one or more sensors to obtain one or more signals indicative of one or more of blood being provided to the organ of interest, blood being received from the organ of interest, and blood present in the organ of interest. Changes in an amount of blood being provided to the organ of interest, an amount of blood being received from the organ of interest, and/or an amount of blood present in the organ of interest are monitored based on changes in the obtained signal(s). Such methods and systems can be used to detect dysfunction of the organ of interest or tumor growth in the organ of interest, but are not limited thereto. | 12-09-2010 |
20110196245 | MEASUREMENT OF CEREBRAL HEMODYNAMIC PARAMETERS - A method of finding an indication of a degree of cerebro-vascular bilateral asymmetry in a subject, comprising:
| 08-11-2011 |
20110201950 | MONITORING OF ACUTE STROKE PATIENTS - A method of monitoring an acute stroke patient, comprising:
| 08-18-2011 |
20110237966 | Device for Blood Flow Property Measurement and Method of its Connection - The device for blood flow property measurement in the body and the method of its connection to the subject enables to measure electrical impedance in the main parts of body simultaneously. The impedance is spatially localized in the particular scanning channels ( | 09-29-2011 |
20120203121 | DEVICES AND METHODS FOR MONITORING CEREBRAL HEMODYNAMIC CHARACTERISTICS - Devices, and methods for receiving and comparing bioimpedance signals are disclosed. In one aspect, the devices and methods may include receiving bioimpedance signals indicative of hemodynamic characteristics within a subject's brain. Bioimpedance signals may be compared, and the comparison used to provide information for diagnosing changes in arterial occlusion. Bioimpedance signals may be associated with left and right sides of a subject's brain. Signature features within the bioimpedance signals may be detected and used to determine differences in the bioimpedance signals. | 08-09-2012 |
20120203122 | DEVICES AND METHODS FOR MONITORING CEREBRAL HEMODYNAMIC CONDITIONS - Devices, and methods for synchronizing cerebro-hemodynamic signals are disclosed. In one aspect, the devices and methods may include synchronizing first and second signals indicative of hemodynamic characteristics within a subject's brain. Differences may be determined between the synchronized signals and used to provide information for diagnosing changes in arterial occlusion. Differences between the synchronized signals may include differences, such as timing delays, between signature features of the synchronized signals. The first and second signals may be indicative of hemodynamic characteristics in first and second hemisphere's of a subject's brain. The first and second signals may be bioimpedance signals. | 08-09-2012 |
20120259237 | FLUID INJECTION SYSTEM COMPRISING A MOTION TRANSFER CABLE - An injection system for transferring a volume of fluid from a syringe into a patient comprises a syringe assembly having a syringe adapter configured to securely receive a pre-filled syringe and a plunger assembly configured to be selectively moved relative to the syringe adapter. The injection system further comprises a fluid delivery module comprising at least one motor to move an actuator in at least one direction. In some embodiments, the injection system additionally comprises a motion transfer cable. In one embodiment, one end of the motion transfer cable is mechanically coupled to the actuator of the fluid delivery module, and the other end is mechanically coupled to the plunger assembly of the syringe assembly. In some embodiments, movement of the actuator by the motor is transferred through the motion transfer cable to the plunger assembly, resulting in the plunger assembly moving a desired distance relative to the pre-filled syringe. | 10-11-2012 |
20130041271 | DEVICES AND METHODS FOR MONITORING INTRACRANIAL PRESSURE AND ADDITIONAL INTRACRANIAL HEMODYNAMIC PARAMETERS - Devices and methods for monitoring intracranial hemodynamic parameters, such as intracranial pressure, cerebral blood volume, cerebral blood flow, and cerebral perfusion pressure are disclosed. In one aspect, the devices and methods may involve receiving at least one impedance plethysmography signal. Waveforms may be extracted from the impedance plethysmography signals and used for estimating the intracranial hemodynamic parameters. Various characteristics may be determined from the waveforms to aid in the estimation of intracranial hemodynamic parameters. | 02-14-2013 |
20130144177 | SYSTEM, METHOD AND APPARATUS FOR MEASURING BLOOD FLOW AND BLOOD VOLUME - A method of calculating blood flow in an organ of a subject using output radiofrequency signals transmitted to the organ and input radiofrequency signals received from the organ, the method comprises determining a phase shift of the input radiofrequency signals relative to the output radiofrequency signals and using the phase shift to calculate the blood flow in the organ. | 06-06-2013 |
20140031705 | HARNESS WITH SENSORS - A garment for ambulatory, physiological monitoring of a patient includes a belt, having first and second end portion with closures at the end portions to wrap around a user's chest, a strap having a first end coupled to a portion of the belt with the strap having a second end, a pair of shoulder strap portions each shoulder strap portion having a first end coupled together at the second end of the strap and a second end, and a back portion that joins the second ends of the pair of shoulder strap portions, with at least one of the belt, strap portions and back portion having an accommodation for carrying a sensor. Other embodiments are described. | 01-30-2014 |
20140163404 | Cerebral Perfusion Monitor - A method of estimating cerebral blood flow by analyzing IPG and PPG signals of the head, the method comprising:
| 06-12-2014 |
20140249435 | BODY-WORN SYSTEM FOR CONTINUOUS, NONINVASIVE MEASUREMENT OF CARDIAC OUTPUT, STROKE VOLUME, CARDIAC POWER, AND BLOOD PRESSURE - The invention provides a system for measuring stroke volume (SV), cardiac output (CO), and cardiac power (CP) from a patient that features: 1) an impedance sensor connected to at least two body-worn electrodes and including an impedance circuit that processes analog signals from the electrodes to measure an impedance signal (e.g. a TBEV waveform); 2) an ECG sensor connected to at least two chest-worn electrodes and including an ECG circuit that processes analog signals from the electrodes to measure and ECG signal; 3) an optical sensor connected to a body-worn optical probe and including an optical circuit that processes signals from the probe to measure at least one optical signal (e.g. a PPG waveform) from the patient; 4) a processing system, typically worn on patient's wrist and connected through a wired interface to the optical sensor, and through either a wired or wireless interface to the TBEV and ECG sensors. | 09-04-2014 |
20140358016 | Device for Monitoring Blood Flow to the Brain - A method of estimating blood flow in a brain, comprising: a) causing currents to flow inside the head by producing electric fields inside the head; b) measuring at least changes in the electric fields and the currents; c) estimating changes in the blood volume of the head, using the measurements of the electric fields and the currents, where the current are produced in children or using electrodes at or near holes in the skull. Optionally, the configuration is selected to focus the flow of current to be inside the brain to a significant degree. | 12-04-2014 |
20150148695 | METHOD AND SYSTEM FOR ASSESSING LIKELIHOOD OF SEPSIS - A method of assessing the likelihood that an infected subject develops sepsis, using an input radiofrequency signal received from the subject responsively to an output radiofrequency signal transmitted to the subject. The method comprises: processing the input signal to provide a processed signal, analyzing the processed signal to determine a characteristic pulse morphology of the processed signal, and using the characteristic pulse morphology for assessing the likelihood that the subject develops sepsis. | 05-28-2015 |
20160022195 | MEASUREMENT OF PHYSIOLOGICAL CHARACTERISTICS - A system for measuring physiological aspects has a non-invasive monitor configured to generate monitor signals relating to fluid characteristics in the head and body. A computational device is operatively connected to the monitor and is configured to process the monitor signals to generate characterizing data relating to at least one of regional fluid volumes, intra/extracellular fluid volume ratios and blood flow. A data output device is connected to the computational device and is configured to output the characterizing data. A method and a computer program product for recording, measuring, and displaying physiological characteristics are also provided. | 01-28-2016 |